DSC_5169 - WGM-0234V Irizar i6s Efficient - Pastuszak - Budapest Deák Ferenc tér M, Bajcsy-Zsilinszky út 10/06/26

school dental treatment

 

Trinity Care Foundation is a network of highly accomplished and networked Public Health Professionals in Karnataka State, India. They aim to solve the challenges of Healthcare in India by working in Synergy with the Government system. At Trinity Care Foundation we aim to create a more efficient and effective social impact ecosystem using preventative healthcare system.

 

To join as an Intern, Link : trinitycarefoundation.org/volunteer

 

Write to us - support@trinitycarefoundation.org

 

Our Work : www.flickr.com/photos/trinitycarefoundation/albums | www.facebook.com/trinitycarefoundation

Desde Repsol apostamos por la innovación tecnológica como motor de nuevos sistemas energéticos más seguros, eficientes y sostenibles.

 

Más info en:

www.repsol.com/es_es/corporacion/conocer-repsol/canal-tec...

 

Repsol is committed to technological innovation as a driver of newer, safer, more efficient and sustainable energy systems.

 

More info on :

www.repsol.com/es_es/corporacion/conocer-repsol/canal- tec ...

The latest arrival for Garelochhead Coaches is this integral Irizar i6s efficient, YT25 DG.

It is seen here at the depot alongside the recently arrived eVoSeti.

Strolling through Old Aberdeen on my way to the University this beauty caught my eye, just had to capture the image to archive on Flickr.

 

Vehicle make: LAND ROVER

Date of first registration: October 2012

Year of manufacture: 2012

Cylinder capacity (cc): 2198 cc

CO₂Emissions: 266 g/km

Fuel type: DIESEL

Export marker: No

Vehicle status: Tax not due

Vehicle colour: BLUE

Vehicle type approval: N1

Wheelplan: 2 AXLE RIGID BODY

Revenue weight: 2505kg

 

The Land Rover Defender (initially called the Land Rover Ninety and Land Rover One Ten) is a British four-wheel-drive off-road SUV developed from the original Land Rover Series launched in June 1948.

 

In October 2013 Land Rover announced that production would end in December 2015 after a continuous run of 67 years.

 

Production finally ended on 29 January 2016 when the last Defender, H166 HUE, rolled off the production line at 9:22.

 

Jaguar Land Rover announced their intention to launch a replacement new Defender, which motoring journalists speculate will be different from the original version.

 

The model was introduced in 1983 as "Land Rover One Ten", and in 1984 the "Land Rover Ninety" was added - the numbers representing the respective wheelbases in inches. (In fact the Ninety was nearer 93 inches at 92.9".)

 

The number was spelled in full in advertising and in handbooks and manuals, and the vehicles also carried badges above the radiator grille which read "Land Rover 90" or "Land Rover 110", with the number rendered numerically.

 

The Ninety and One Ten replaced the earlier Land Rover Series, and at the time of launch, the only other Land Rover model in production was the Range Rover.

 

In 1989, a third model was brought out by Land Rover to be produced in parallel with the other two: the Land Rover Discovery.

 

To avoid possible confusion, from 1991 the Ninety and the One Ten were renamed the "Defender 90" and "Defender 110". These carried front badges that said "Defender", with a badge on the rear of the vehicle saying "Defender 90" or "Defender 110".

 

The most recent model, from 2007-2016, still featured the space above the radiator for the badge but was blank. Instead had "Land Rover" spelled across the leading edge of the bonnet in raised individual letters, in keeping with the Discovery and Freelander. At the rear was a new style of '"Defender" badge with an underlining "swoosh". On these last models there are no badges defining the wheelbase model of the vehicle.

 

The 127-inch (3,226 mm) wheelbase Land Rover 127, available from 1985, was always marketed with the name rendered numerically. Following the adoption of the Defender name, it became the "Defender 130", although the wheelbase remained unchanged.

 

The North American Specification (NAS) Defender 110 sold for the 1993 model year carried a badge above the radiator grille which read "Defender," whereas the NAS Defender 90 sold for the 1994 to 1997 model years had "Land Rover" spelled across the top of the radiator grille in individual letter decals. NAS Defenders also carried a cast plaque on the rear tub in the original style of the Series Station wagons with "Defender 110" or "Defender 90" below the Land Rover lozenge and the vehicle's unique limited edition production run number.

 

Production of the model now known as the Defender began in 1983 as the Land Rover 110, a name which reflected the 110-inch (2,800 mm) length of the wheelbase. The Land Rover 90, with 93-inch (2,362 mm) wheelbase, and Land Rover 127, with 127-inch (3,226 mm) wheelbase, soon followed.[4]

Outwardly, there is little to distinguish the post-1983 vehicles from the Series III Land Rover. A full-length bonnet, revised grille, plus the fitting of wheel arch extensions to cover wider-track axles are the most noticeable changes. Initially the Land Rover was also available with a part-time 4WD system familiar to all derivatives produced since 1949. The part-time system failed to sell and was quickly dropped from the options list by 1984. While the engine and other body panels carried over from the Series III, mechanically the 90 and 110 were modernized, including:

Coil springs, offering a more comfortable ride and improved axle articulation

A permanent four-wheel-drive system derived from the Range Rover, featuring a two-speed transfer gearbox with a lockable centre differential

A modernised interior

A taller one-piece windscreen

A new series of progressively more powerful and modern engines

The 110 was launched in 1983, and the 90 followed in 1984. From 1984, wind-up windows were fitted (Series models and very early 110s had sliding panels), and a 2.5-litre (153 cu in), 68 horsepower (51 kW) diesel engine was introduced. This was based on the earlier 2.3-litre (140 cu in) engine, but had a more modern fuel-injection system as well as increased capacity. A low compression version of the 3.5-litre (214 cu in) V8 Range Rover engine transformed performance. It was initially available in the 110 with a four-speed transmission with integral transfer case, then later in conjunction with a high strength "Santana" five-speed transmission.[5]

This period saw Land Rover market the utility Land Rover as a private recreational vehicle. While the basic pick-up, 4x4 and van versions were still working vehicles, the County 4x4s were sold as multi-purpose family vehicles, featuring improved interior trim and more comfortable seats. This change was reflected in Land Rover starting what had long been common practice in the car industry — detail changes and improvements to the County model from year to year in order to attract new buyers and to encourage existing owners to trade in for a new vehicle. These changes included different exterior styling graphics and colour options, and the introduction of new options, such as radio-cassette players, styled wheels, headlamp wash and wipe systems, as well as accessories such as surfboard carriers and bike racks. The switch from leaf spring to coil spring suspension was a key part of the new model's success. It offered improved off-road ability, load capacity, handling, and ride comfort.

 

The 127 (and 130)

 

From 1983, Land Rover introduced a third wheelbase to its utility line-up, a 127-inch (3,226 mm) wheelbase vehicle designed to accommodate larger, heavier loads than the 110. Called the "Land Rover 127", it was designed specifically with use by utility and electrical companies in mind, as well as military usage.

 

In its standard form, it is a four-door six-seater consisting of the front half of a 110 4x4, and the rear of a 110 high-capacity pick up (HCPU).

 

The logic was that this allowed a workcrew and their equipment to be carried in one vehicle at the same time. The 127 could carry up to a 1.4 tonnes (1.4 long tons; 1.5 short tons) payload, compared to the 1.03 tonnes (1.01 long tons; 1.14 short tons) payload of the 110 and the 0.6 tonnes (0.59 long tons; 0.66 short tons) of the 90

Land Rover 127s were built on a special production line, and all started life as 110 4x4 chassis (the model was initially marketed as the 110 crew cab, before the more logical 127 name was adopted). These were then cut in two and the 17 inches (432 mm) of extra chassis length welded on before the two original halves were reunited. These models did not receive their own dedicated badging like the other two models, instead they used the same metal grille badges as used on the Series III 109 V8 models, that simply said "Land-Rover".

 

Land Rover Defender 130; fully equipped car in the desert

Although the standard body-style was popular, the 127 was a common basis for conversion to specialist uses, such as mobile workshops, ambulances, fire engines and flatbed transports. In South Africa, the Land Rover assembly plant offered a 127 4x4 with seating for 15. Land Rover also offered the 127 as a bare chassis, with just front bodywork and bulkhead, for easy conversion.

 

127" chassis with double cab and bimobil camper module

Initially held back by the low power of the Land Rover engines (other than the thirsty petrol V8 engine), the 127 benefited from the improvements to the line-up, and by 1990 was only available with the two highest power engines, the 134 hp (100 kW) 3.5-litre V8 petrol, and the 85 hp (63 kW) 2.5-litre turbo diesel .

 

Engine development

 

The original 110 of 1983 was available with the same engine line-up as the Series III vehicles it replaced, namely 2.25-litre (137 cu in) petrol and diesel engines, and a 3.5-litre (210 cu in) V8 petrol unit, although a small number of 3.2-litre (200 cu in) V8s were produced.

 

In 1981 the 2.25 l engines were upgraded from three- to five-crankshaft bearings in preparation for the planned increases in capacity and power.

 

The 2.5-litre version of the diesel engine, displacing 2,495 cubic centimetres (152.3 cu in) and producing 68 hp (51 kW), was introduced in both the 110 and the newly arrived 90. This was a long-stroke version of the venerable 2.25-litre unit, fitted with updated fuel injection equipment and a revised cylinder head for quieter, smoother and more efficient running. A timing belt also replaced the older engine's chain.

 

In 1985 the petrol units were upgraded. An enlarged four-cylinder engine was introduced. This 83 hp (62 kW) engine shared the same block and cooling system (as well as other ancillary components) as the diesel unit. Unlike the diesel engine, this new 2.5-litre petrol engine retained the chain-driven camshaft of its 2.25-litre predecessor. At the same time, the 114 hp (85 kW) V8 was also made available in the 90- the first time a production short-wheelbase Land Rover had been given V8 power.

 

The V8 on both models was now mated to an all-new five-speed manual gearbox.

 

The year 1986 saw improvements in engines to match the more advanced offerings by Japanese competitors. The "Diesel Turbo" engine was introduced in September, a lightly turbocharged version of the existing 2.5-litre diesel, with several changes to suit the higher power output, including a re-designed crankshaft, teflon-coated pistons and nimonic steel exhaust valves to cope with the higher internal temperatures.[4][6] Similarly, an eight-bladed cooling fan was fitted, together with an oil cooler.

 

The changes for the turbo diesel were kept as slight as possible, in the aim of making the car saleable in Land Rover's traditional export markets across the globe.

 

The 2.5 diesel, 2.5 petrol and Diesel Turbo engines all shared the same block castings and other components such as valve-gear and cooling system parts, allowing them to be built on the same production line. The Diesel Turbo produced 85 hp (63 kW), a 13% increase over the naturally aspirated unit, and a 31.5% increase in torque to 150 lb·ft (203 N·m) at 1800 rpm.

 

Externally, turbo-diesel vehicles differed from other models only by having an air intake grille in the left-hand wing to supply cool air to the turbo. The engine was adopted as the standard engine for UK and European markets.

 

Early turbo-diesel engines gained a reputation for poor reliability, with major failures to the bottom-end and cracked pistons. A revised block and improved big end bearings were introduced in 1988, and a re-designed breather system in 1989. These largely solved the engine's problems, but it remained (like many early turbo-diesels) prone to failure if maintenance was neglected.

 

At the same time that the Diesel Turbo was introduced, the V8 engine was upgraded. Power was increased to 134 hp (100 kW), and SU carburettors replaced the Zenith models used on earlier V8s.

 

Sales turnaround

 

The new vehicles with their more modern engines, transmissions, and interiors reversed the huge decline in sales that took place in the 1980s (a 21% fall in a single year, 1980–1981). This growth was mainly in the domestic UK market and Europe. African, Australian and Middle-Eastern sales failed to recover significantly - Land Rover had not been immune to the poor reputation caused by poor build quality and unreliability which had afflicted the rest of British Leyland, of which Land Rover was still part. In these markets Japanese vehicles such as the Toyota Landcruiser and Nissan Patrol gradually took over what had been a lucrative export market for Land Rover for decades. Meanwhile, the company itself adopted more modern practices, such as using marketing campaigns to attract new buyers who would not previously have been expected to buy a Land Rover. The operation was streamlined, with most of the satellite factories in the West Midlands that built parts for the Land Rover being closed and production brought into the Solihull factory, which was expanded.

 

To maximise sales in Europe, Land Rover set up the Special Vehicles Division, which handled special low-number conversions and adaptations to the vehicles. The bulk of the division's work was the construction of stretched-wheelbase mobile workshops and crew carriers for British and European utility companies, often including six-wheel-drive conversions, but more unusual projects were undertaken, such as the construction of an amphibious Land Rover 90 used by the company as part of its sponsorship of Cowes Week from 1987 to 1990.

 

The Special Projects Division also handled specialised military contracts, such as the building of a fleet of 127-inch (3,226 mm)

V8-powered Rapier missile launchers for the British Army. The Rapier system actually consisted of three Land Rovers: a 127 which carried the launching and aiming equipment, and two 110s which carried the crew and additional equipment.

 

Land Rover Defender

 

The biggest change to the Land Rover came in late 1990, when it became the Land Rover Defender, instead of the Land Rover 90 or 110. This was because in 1989 the company had introduced the Discovery model, requiring the original Land Rover to acquire a name.

 

The Discovery also had a new turbodiesel engine, the 200TDi. This was also loosely based on the existing 2.5-litre turbo unit, and was built on the same production line, but had a modern alloy cylinder head, improved turbocharging, intercooling and direct injection.

 

It retained the block, crankshaft, main bearings, cambelt system, and other ancillaries as the Diesel Turbo. The breather system included an oil separator filter to remove oil from the air in the system, thus finally solving the Diesel Turbo's main weakness of re-breathing its own sump oil. The 200Tdi, produced 107 hp (80 kW) and 195 lb·ft (264 N·m) of torque, which was nearly a 25% improvement on the engine it replaced (although as installed in the Defender the engine was de-tuned slightly from its original Discovery 111 hp (83 kW) specification due to changes associated with the turbo position and exhaust routing).

 

This engine finally allowed the Defender to cruise comfortably at high speeds, as well as tow heavy loads speedily on hills while still being economical.

 

In theory it only replaced the older Diesel Turbo engine in the range, with the other four-cylinder engines (and the V8 petrol engine) still being available. However, the Tdi's combination of performance and economy meant that it took the vast majority of sales. Exceptions were the British Army and some commercial operators, who continued to buy vehicles with the 2.5-litre naturally aspirated diesel engine (in the army's case, this was because the Tdi was unable to be fitted with a 24 volt generator). Small numbers of V8-engined Defenders were sold to users in countries with low fuel costs or who required as much power as possible (such as in Defenders used as fire engines and ambulances).

 

Along with the 200Tdi engine, the 127's name was changed to the "Land Rover Defender 130". The wheelbase remained the same; the new figure was simply a tidying up exercise. More importantly, 130s were no longer built from "cut-and-shut" 110s, but had dedicated chassis built from scratch. The chassis retained the same basic structure as the 90 and 110 models, but with a longer wheelbase.

1994 saw another development of the Tdi engine, the 300Tdi. Although the 200Tdi had been a big step forward, it had been essentially a reworking of the old turbocharged diesel to accept a direct injection system. In contrast the 300Tdi was virtually new, despite the same capacity, and both the Defender and the Discovery had engines in the same state of tune, 111 bhp (83 kW), 195 lbf·ft (264 N·m).

 

Throughout the 1990s the vehicle attempted to climb more and more upmarket, while remaining true to its working roots. This trend was epitomised by limited-edition vehicles, such as the SV90 in 1992 with roll-over protection cage, alloy wheels and metallic paint and the 50th anniversary 90 in 1998, equipped with automatic transmission, air conditioning and Range Rover 4.0-litre V8 engine.

 

A new variant was the Defender 110 double cab, featuring a 4x4-style seating area, with an open pick up back. Although prototypes had been built in the Series days, it was not until the late 1990s that this vehicle finally reached production.

 

2012 updates

 

In August 2011, Land Rover announced an update of the Defender for the 2012 model year. By this time, Land Rover publicly acknowledged that it was working on a project to produce an all-new replacement for the Defender. This would lead to the unveiling of the first DC100 concept vehicle in September that year. While emissions and safety regulations have threatened the Defender since the early 2000s, these had either been avoided or Land Rover had found ways to modify the vehicle to economically meet the new requirements. However, safety regulations due for introduction in 2015 requiring minimum pedestrian safety standards and the fitment of airbags to commercial vehicles cannot be met without a wholesale redesign of the Defender.

 

The main change for the 2012 models was the installation of a different engine from the Ford Duratorq engine range. Ford decided, due to cost reasons, not to modify the 2.4-litre engine introduced in 2007 to meet the upcoming Euro V emissions standards and so the engine was replaced with the ZSD-422 engine, essentially a 2.2-litre variant of the same engine. Although smaller than the existing unit the power and torque outputs remained unchanged and the same six-speed gearbox was used as well.

 

The engine included a diesel particulate filter for the first time on a Defender. The only other change was the reintroduction of the soft top body style to the general market. This had been a popular option for the Land Rover Series but by the introduction of the Defender had been relegated to special order and military buyers only. Land Rover stated that the option was being brought back due to customer feedback.

 

The last Defender, a soft-top "90" rolled off the Solihull production line at 9:22 on Friday 29 January 2016. The BBC reports that the Defender's replacement is due to be launched in 2018/2019.

   

...evidence very efficiently.

AUMSVILLE, Ore. – Father-son farmers Steve (right) and Daniel (left) Keudell are seeing tremendous energy and water savings on their 1,600-acre vegetable farm, thanks to energy-efficient linear irrigation systems installed with financial assistance from USDA’s Natural Resources Conservation Service (NRCS). NRCS is helping farmers in Marion County convert to low-pressure, efficient irrigation systems, as part of a strategic groundwater conservation initiative in the Stayton-Sublimity Restricted Groundwater Priority Area. The new linear irrigation systems are up to 30 percent more efficient than other systems typically used in the area (such as big guns), and they save significant water and energy. Over time, these water savings reduce the strain on the groundwater priority area and allow the aquifer to stabilize. NRCS photo by Tracy Robillard, June 2015.

 

The BMW i8, first introduced as the BMW Concept Vision Efficient Dynamics, is a plug-in hybrid sports car developed by BMW. The 2015 model year BMW i8 has a 7.1 kWh lithium-ion battery pack that delivers an all-electric range of 37 km (23 mi) under the New European Driving Cycle (NEDC).[5] Under the United States Environmental Protection Agency (EPA) cycle, the range in EV mode is 24 km (15 mi) with a small amount of gasoline consumption.

 

The BMW i8 can go from 0–100 km/h (0 to 60 mph) in 4.4 seconds and has a top speed of 250 km/h (155 mph). The BMW i8 has a fuel efficiency of 2.1 L/100 km (134.5 mpg-imp; 112.0 mpg-US) under the NEDC test with carbon emissions of 49 g/km. EPA rated the i8 combined fuel economy at 76 equivalent (MPG-equivalent) (3.1 L gasoline equivalent/100 km; 91 mpg-imp gasoline equivalent).

 

The initial turbodiesel concept car was unveiled at the 2009 International Motor Show Germany. The production version of the BMW i8 was unveiled at the 2013 Frankfurt Motor Show. The i8 was released in Germany in June 2014. Deliveries to retail customers in the U.S. began in August 2014. Global cumulative sales totaled almost 4,500 units through June 2015.

 

History

 

The i8 is part of BMW's "Project i" and it is being marketed as a new brand, BMW i, sold separately from BMW or Mini. The BMW i3, launched for retail customers in Europe in the fourth quarter of 2013, was the first model of the i brand available in the market, and it was followed by the i8, released in Germany in June 2014 as a 2015 model year. Other i models are expected to follow.

 

The initial turbodiesel concept car was unveiled at the 2009 International Motor Show Germany, In 2010, BMW announced the mass production of the Concept Vision Efficient Dynamics in Leipzig beginning in 2013 as the BMW i8. The BMW i8 gasoline-powered concept car destined for production was unveiled at the 2011 Frankfurt Motor Show. The production version of the BMW i8 was unveiled at the 2013 International Motor Show Germany. The following are the concept and pre-production models developed by BMW that precedeed the production version.

 

BMW Vision EfficientDynamics (2009)

 

BMW Vision EfficientDynamics concept car is a plug-in hybrid with a three cylinder turbodiesel engine. Additionally, there are two electric motors with 139 horsepower. It allows an acceleration to 100 km/h (62 mph) in 4.8 seconds and an electronically limited top speed of 250 km/h (160 mph).

 

According to BMW, the average fuel consumption in the EU test cycle (KV01) is 3.76 liters/100 kilometers, (75.1 mpg imp), and has a carbon dioxide emission rating of 99 grams per kilometer (1,3 l/100 km and 33g CO2/km ; EU-PHEV ECE-R101). The estimated all-electric range is 50 km (31 mi), and the 24-liter petrol tank extends the total vehicle range to up to 700 km (430 mi). The lightweight chassis is made mainly from aluminum. The windshield, top, doors and fenders are made from polycarbonate glass, with the body having a drag coefficient of 0.26.

 

The designers in charge of the BMW Vision EfficientDynamics Concept were Mario Majdandzic, Exterior Design and Jochen Paesen, Interior Design.

 

The vehicle was unveiled in 2009 International Motor Show Germany, followed by Auto China 2010.

 

BMW i8 Concept (2011)

 

BMW i8 Concept plug-in hybrid electric vehicle includes an electric motor located in the front axle powering the front wheels rated 96 kW (131 PS; 129 hp) and 250 N·m (184 lb·ft), a turbocharged 1.5-liter 3-cylinder gasoline engine driving rear wheels rated 164 kW (223 PS; 220 hp) and 300 N·m (221 lb·ft) of torque, with combined output of 260 kW (354 PS; 349 hp) and 550 N·m (406 lb·ft), a 7.2 kWh (26 MJ) lithium-ion battery pack that allows an all-electric range of 35 km (22 mi). All four wheels provide regenerative braking. The location of the battery pack in the energy tunnel gives the vehicle a low centre of gravity, enhancing its dynamics. Its top speed is electronically limited to 250 km/h (160 mph) and is expected to go from 0 to 100 km/h (0 to 60 mph) in 4.6 seconds. Under normal driving conditions the i8 is expected to deliver 80 mpg-US (2.9 L/100 km; 96 mpg-imp) under the European cycle. A full charge of the battery will take less than 2 hours using 220V. The positioning of the motor and engine over the axles results in optimum 50/50 weight distribution.

 

The vehicle was unveiled at the 2011 International Motor Show Germany, followed by CENTER 548 in New York City, 42nd Tokyo Motor Show 2011, 82nd Geneva Motor Show 2012, BMW i Born Electric Tour at the Palazzo delle Esposizioni at Via Nazionale 194 in Rome, Auto Shanghai 2013.

 

This concept car was featured in the film Mission: Impossible – Ghost Protocol.

 

BMW i8 Concept Spyder (2012)

 

The BMW i8 Concept Spyder included a slightly shorter wheelbase and overall length over the BMW i8 Concept, carbon-fibre-reinforced plastic (CFRP) Life module, drive modules made primarily from aluminium components, interlocking of surfaces and lines, 8.8-inch (22.4 cm) screen display, off-white outer layer, orange tone naturally tanned leather upholstery.

 

The vehicle was unveiled in Auto China 2012 in Beijing and won Concept Car of the Year, followed by 83rd Geneva International Motor Show 2013.

 

The designer of the BMW i8 Concept Spyder was Richard Kim.

 

BMW i8 coupe prototype (2013)

 

The design of the BMW i8 coupe prototype was based on the BMW i8 Concept. The BMW i8 prototype has an average fuel efficiency of less than 2.5 L/100 km (113.0 mpg-imp; 94.1 mpg-US) under the New European Driving Cycle with carbon emissions of less than 59 g/km. The i8 with its carbon-fiber-reinforced plastic (CFRP) passenger cell lightweight, aerodynamically optimized body, and BMW eDrive technology offers the dynamic performance of a sports car, with an expected 0–100 km (0–60 mi) sprint time of less than 4.5 seconds using both power sources. The plug-in hybrid system of the BMW i8 comprises a three-cylinder, 1.5-liter BMW TwinPower turbo gasoline engine combined with BMW eDrive technology used in the BMW i3 and develops maximum power of 170 kW (230 hp). The BMW i8 is the first BMW production model to be powered by a three-cylinder gasoline engine and the resulting specific output of 115 kW (154 hp) per liter of displacement is on a par with high-performance sports car engines and is the highest of any engine produced by the BMW Group.

 

The BMW i8's second power source is a hybrid synchronous electric motor specially developed and produced by the BMW Group for BMW i. The electric motor develops maximum power of 131 hp (96 kW) and produces its maximum torque of around 320 N·m (240 lbf·ft) from standstill. Typical of an electric motor, responsive power is instantly available when starting and this continues into the higher load ranges. As well as providing a power boost to assist the gasoline engine during acceleration, the electric motor can also power the vehicle by itself. Top speed in electric mode is approximately 120 km/h (75 mph), with a maximum driving range of up to 35 km (22 mi). Linear acceleration is maintained even at higher speeds since the interplay between the two power sources efficiently absorbs any power flow interruptions when shifting gears. The BMW i8 has an electronically controlled top speed of 250 km (160 mi), which can be reached and maintained when the vehicle operates solely on the gasoline engine. The model-specific version of the high-voltage 7.2 lithium-ion battery has a liquid cooling system and can be recharged at a conventional household power socket, at a BMW i Wallbox or at a public charging station. In the US a full recharge takes approximately 3.5 hours from a conventional 120V, 12 amp household circuit or approximately 1.5 hours from a 220V Level 2 charger.

 

The driver can also select several driving modes: SPORT, COMFORT and ECO PRO. Using the gear selector, the driver can either select position D for automated gear selection or can switch to SPORT mode. SPORT mode offers manual gear selection and at the same time switches to very sporty drive and suspension settings. In SPORT mode, the engine and electric motor deliver extra performance, accelerator response is faster and the power boost from the electric motor is maximized. And to keep the battery topped up, SPORT mode also activates maximum energy recuperation during overrun and braking as the electric motor’s generator function, which recharges the battery using kinetic energy, switches to a more powerful setting. The Driving Experience Control switch on the center console offers a choice of two settings. On starting, COMFORT mode is activated, which offers a balance between sporty performance and fuel efficiency, with unrestricted access to all convenience functions. Alternatively, the ECO PRO mode can be engaged, which, on the BMW i8 as on other models, supports an efficiency-optimized driving style. On this mode the powertrain controller coordinates the cooperation between the gasoline engine and the electric motor for maximum fuel economy. On deceleration, the intelligent energy management system automatically decides, in line with the driving situation and vehicle status, whether to recuperate braking energy or to coast with the powertrain disengaged. At the same time, ECO PRO mode also programs electrical convenience functions such as the air conditioning, seat heating and heated mirrors to operate at minimum power consumption, but without compromising safety. The maximum driving range of the BMW i8 on a full fuel tank and with a fully charged battery is more than 500 km (310 mi) in COMFORT mode, which can be increased by up to 20% in ECO PRO mode. The BMW i8’s ECO PRO mode can also be used during all-electric operation. The vehicle is then powered solely by the electric motor. Only if the battery charge drops below a given level, or under sudden intense throttle application such as kickdown, is the internal combustion engine automatically activated.

 

The vehicle was unveiled in BMW Group's Miramas test track in France.

 

Production version

 

The production BMW i8 was designed by Benoit Jacob. The production version was unveiled at the 2013 International Motor Show Germany, followed by 2013 Les Voiles de Saint-Tropez. It features butterfly doors, head-up display, rear-view cameras and partially false engine noise. Series production of customer vehicles began in April 2014. It is the first production car with laser headlights, reaching further than LED lights.

 

The i8 has a low vehicle weight of 1,485 kg (3,274 lb) (DIN kerb weight) and a low drag coefficient (Cd) of 0.26. In all-electric mode the BMW i8 has a top speed of 120 km/h (75 mph). In Sport mode the i8 delivers a mid-range acceleration from 80 to 120 km/h (50 to 75 mph) in 2.6 seconds. The electronically controlled top speed is 250 km/h (160 mph).

 

Range and fuel economy[edit]

The production i8 has a 7.1 kWh lithium-ion battery pack with a usable capacity of 5.2 kWh and intelligent energy management that delivers an all-electric range of 37 km (23 mi) under the NEDC cycle. Under the EPA cycle, the range in EV mode is 15 mi (24 km), with a gasoline consumption of 0.1 gallons per 100 mi, and as a result, EPA's all-electric range is zero. The total range is 330 mi (530 km).

 

The production version has a fuel efficiency of 2.1 L/100 km (134.5 mpg-imp; 112.0 mpg-US) under the NEDC test with carbon emissions of 49 g/km.[5] Under EPA cycle, the i8 combined fuel economy in EV mode was rated 76 equivalent (MPG-equivalent) (3.1 L gasoline equivalent/100 km; 91 mpg-imp gasoline equivalent), with an energy consumption of 43 kW-hrs/100 mi and gasoline consumption of 0.1 gal-US/100 mi. The combined fuel economy when running only with gasoline is 28 mpg-US (8.4 L/100 km; 34 mpg-imp), 28 mpg-US (8.4 L/100 km; 34 mpg-imp) for city driving, and 29 mpg-US (8.1 L/100 km; 35 mpg-imp) in highway.

 

The U.S. Environmental Protection Agency's 2014 edition of the "Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends" introduced utility factors for plug-in hybrids to represent the percentage of miles that will be driven using electricity by an average driver, in electric only or blended modes. The BMW i8 has a utility factor in EV mode of 37%, compared with 83% for the BMW i3 REx, 66% for the Chevrolet Volt, 65% for the Cadillac ELR, 45% for the Ford Energi models, 43% for the McLaren P1, 39% for the Porsche Panamera S E-Hybrid, and 29% for the Toyota Prius PHV.

 

[Text from Wikipedia]

 

en.wikipedia.org/wiki/BMW_i8

 

This Lego miniland-scale BMW i8 has been created for Flickr LUGNuts' 94th Build Challenge, - "Appease the Elves Summer Automobile Build-off (Part 2)", - a design challenge combining the resources of LUGNuts, TheLegoCarBlog (TLCB) and Head Turnerz.

The Pitcairn PA-5 Mailwing was designed to carry air mail along the routes of the eastern United States. Efficient and economical, it helped build the route structure for what would ultimately become Eastern Air Lines.

  

Mailwing NC-2895 was built in 1927 and was the prototype for a series of Pitcairn mail planes. It combined a square-steel-tube fuselage with wooden wings, both covered by fabric.

 

After it became obsolete as a mail plane, this airplane served several private owners, survived a crash, and saw use as a crop-duster.

 

It was repurchased by employees of Eastern Air Lines, restored, and presented to company president Capt. Edward V. "Eddie" Rickenbacker, who later donated it to the Museum.

 

The aircraft was restored in 1975 by veteran Eastern pilot Capt. Joseph Toth.

The frame and the walls are made of wood - a climate-positive building that stores carbon dioxide. Both sides of the roof and the balcony fronts and gables are made of solar cells. 15 apartments for rent in each of the three buildings owned by the building company ETC Bygg. On the ground floor there is a shared laundry and room for bicycles.

There is also a car pool with an electric car for the three buildings.

The buildings are very energy efficient. Statistics regarding energy use in the buildings after one year show that one building uses as much energy as a normal villa. But thirty people live in one building, in a villa normally 3-4. This means that the large buildings actually save around 90% of the energy cost compared to normal villas.

Built: 2022-23. Architects: Hans Eek and Kaminsky Arkitektur.

Irizar i6s Efficient Integral de Avanza Movilidad Guipuzkoa.

These two Officer of the Chicago Police Mounted Unit have, quite appropriately in my view, parked their mounts in the space reserved for "fuel efficient vehicle parking only!"

 

2916 W. 47th Street.

More Info: www.axialracing.com/t/vehicles/rr10

 

The RR10 Bomber build-it-yourself kit is loaded with features allowing you to customize it and add your own electronics for the ultimate rock racer! Building on the current, successful ready-to-run model, this kit version includes a wide variety of desirable option parts that deliver next level performance and durability. Hard anodized aluminum suspension links, hard anodized aluminum steering links, long travel rear sway bar, hardened steel universal axles allowing up to 50 degrees of steering, aluminum lower link plates, and King adjustable machined aluminum shocks, all riding on sticky BFGoodrich® Baja T/A® KR2 tires wrapped around 2.2 Walker Evans Racing beadlock wheels.

 

FEATURES:

 

HARD ANODIZED MACHINED ALUMINUM THREADED LINKS:

The upper and lower suspension links as well as the steering tie rod and drag link are machined from aluminum to reduce flex and provide precise control over the roughest terrain. The tubes are threaded at both ends for easy assembly and they use larger and stronger M4 hardware.

 

HARD ANODIZED MACHINED ALUMINUM STEERING LINKS:

Our machined aluminum steering links give you more precise steering feel and response to help keep your rig pointed in the right direction. They’re hard anodized and use larger and stronger M4 hardware for durability.

 

LONG TRAVEL REAR SWAY BAR:

The pursuit of horsepower and the ability to put the power to the ground is one of the main aspects of offroad racing. This unique torsion bar design with long pivot arms used in conjunction with the long travel suspension is designed to help control the torque twist associated with massive power. This system also helps reduce body roll and adds stability at high speeds.

 

UNIVERSAL AXLES:

Our universal joint axles increase steering angle to 50 degrees, that's 60% over the stock dogbone/drive cup setup. Our universals provide smoother action for a higher performing, efficient drivetrain. The universal is oversized; a design you'd see on 1/8 scale vehicles and it's made of hardened steel so it's capable of handling extreme power.

• AR60 OCP universal axle set

• Up to 50 degrees of steering

• Smooth action for an efficient drivetrain

• Oversized design for durability

• Hardened steel construction

 

KING ADJUSTABLE MACHINED ALUMINUM SHOCKS:

The included aluminum King Shocks feature precision machined pistons which offer smooth performance throughout the range of travel. Made to tight tolerances, these aluminum shocks feature clear coated polished aluminum bodies, machined aluminum caps and aluminum preload spacers for precision shock adjustments. The rear shocks are mounted on the links rather than at the axle, allowing for more suspension travel which is better for high speed handling.

 

ALUMINUM LOWER LINK PLATES:

Includes hard anodized 2mm aluminum lower link plates for added durability and stiffness of the rear 4 link suspension.

 

2.2 WALKER EVANS RACING BEADLOCK WHEELS:

Officially licensed Walker Evans Racing beadlock wheels dressed in an aggressive all black style and they work with most 2.2 tires. Our IFD™ (Interchangeable Face Design) wheel system makes it easy to dress it up with a new look. The wheel design allows you to vary the amount of air passing through the breather holes. You can select between having one, two or three open holes (two, four or six total) by rotating the inner (beadlock) ring. The position is locked with reassembly.

• Three piece beadlock design

• Utilizes new 2x11mm pins for added strength

• Updated plastic hub adapter to eliminate slop and capture the new 2x11mm pin

• Adjustable breather holes for fine tuning tire performance

• Compatible with most 2.2 tires

• Easy six screw disassembly

 

BFGOODRICH® BAJA T/A® KR2 TIRES - R35 COMPOUND:

In the full-size world of off-road racing, BFGoodrich® tires have proven to be the ‘go-to’ tire for numerous racing victories, including Randy Slawson piloting them to victory at the 2013 and 2015 King of the Hammers. Axial’s version of this tire captures the same aggressive look and provides remarkable performance on a wide variety of surfaces. This is the perfect tire for this style of vehicle due to its high level of performance and diversity.

 

AR60 OCP-AXLE™:

The AR60 OCP-Axle™ is constructed from high strength composite material which has a low flex rate but is not as brittle as standard glass filled nylon. The combination of our axles and a true 4-link suspension gives you optimal performance for any terrain with the look of a real 1:1 vehicle.

• Off-center pumpkin design

• Axle tubes are reinforced with a boxed-in axle truss

• High strength composite material

• Updated steering knuckles for dual shear, also eliminates secondary bolt on plate

• Updated differential cover and servo mount for a new look

 

WB8 HD WILDBOAR™ DRIVESHAFTS, FRONT AND REAR:

The WB8 HD driveshafts feature an updated design with a larger diameter cross pin (2x11mm) along with an M4 Screw Shaft (2mm hex drive) for added strength. A center splined slider floats between each end and features added material which reduces flex and fatigue.

• 3-piece driveshaft with strengthened slider-floater tube.

• Increased surface at the connection between the ball joints and output shaft tubes.

• 2x11mm cross pin adds 25% more surface area providing more strength for the ball joint.

• Captured cross pin design eliminates older set screw design for more durability and easy maintenance.

 

MULTIPLE SHOCK/LINK POINTS AND DUAL SHEAR SHOCK MOUNTS:

We've included a variety of shock mounting points for running dual shock setups and for additional suspension tuning options. On the skid plate you'll find two front upper link mount positions and three rear upper link mount positions. All shock-mounting locations are dual shear with optional secondary shock mounts allowing for dual shock setups.

 

REALISTIC SCALE DETAILS:

Realistic scale details include molded driver figures, three pairs of helmets, molded shock reservoirs, a fuel cell, Bomber Fabrication body panels, two full color decal sheets with enough graphics for two completely unique looks, and a fully licensed scale tube chassis.

  

BFGoodrich® Tires and Baja T/A® KR2 Trademarks are used under License from Michelin

 

Odyssey Battery trademark(s) is/are the property of EnerSys and affiliates

 

NOTE: Prototype shown. Some imagery may differ from the actual product. Electronics shown are not included.

SunPower Touts World's Most Efficient Silicon Solar Panel - t.co/flIUZwsNNF t.co/lhM4bJnFnQ (via Twitter twitter.com/EnergySaversCA/status/755410977047322626)

Jellyfish, also known sea jellies, are the medusa-phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria.

 

Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles, although a few are anchored to the seabed by stalks rather than being mobile. The bell can pulsate to provide propulsion for highly efficient locomotion. The tentacles are armed with stinging cells and may be used to capture prey and defend against predators. Jellyfish have a complex life cycle. The medusa is normally the sexual phase, which produces planula larvae; these then disperse widely and enter a sedentary polyp phase, before reaching sexual maturity.

 

Jellyfish are found all over the world, from surface waters to the deep sea. Scyphozoans (the "true jellyfish") are exclusively marine, but some hydrozoans with a similar appearance live in freshwater. Large, often colorful, jellyfish are common in coastal zones worldwide. The medusae of most species are fast-growing, and mature within a few months then die soon after breeding, but the polyp stage, attached to the seabed, may be much more long-lived. Jellyfish have been in existence for at least 500 million years,[1] and possibly 700 million years or more, making them the oldest multi-organ animal group.[2]

 

Jellyfish are eaten by humans in certain cultures. They are considered a delicacy in some Asian countries, where species in the Rhizostomeae order are pressed and salted to remove excess water. Australian researchers have described them as a "perfect food": sustainable and protein-rich but relatively low in food energy.[3]

 

They are also used in research, where the green fluorescent protein used by some species to cause bioluminescence has been adapted as a fluorescent marker for genes inserted into other cells or organisms.

 

The stinging cells used by jellyfish to subdue their prey can injure humans. Thousands of swimmers worldwide are stung every year, with effects ranging from mild discomfort to serious injury or even death. When conditions are favourable, jellyfish can form vast swarms, which can be responsible for damage to fishing gear by filling fishing nets, and sometimes clog the cooling systems of power and desalination plants which draw their water from the sea.

  

Names

The name jellyfish, in use since 1796,[4] has traditionally been applied to medusae and all similar animals including the comb jellies (ctenophores, another phylum).[5][6] The term jellies or sea jellies is more recent, having been introduced by public aquaria in an effort to avoid use of the word "fish" with its modern connotation of an animal with a backbone, though shellfish, cuttlefish and starfish are not vertebrates either.[7][8] In scientific literature, "jelly" and "jellyfish" have been used interchangeably.[9][10] Many sources refer to only scyphozoans as "true jellyfish".[11]

 

A group of jellyfish is called a "smack"[12] or a "smuck".[13]

 

Mapping to taxonomic groups

 

A purple-striped jellyfish at the Monterey Bay Aquarium

Phylogeny

Definition

The term jellyfish broadly corresponds to medusae,[4] that is, a life-cycle stage in the Medusozoa. The American evolutionary biologist Paulyn Cartwright gives the following general definition:

 

Typically, medusozoan cnidarians have a pelagic, predatory jellyfish stage in their life cycle; staurozoans are the exceptions [as they are stalked].[14]

 

The Merriam-Webster dictionary defines jellyfish as follows:

 

A free-swimming marine coelenterate that is the sexually reproducing form of a hydrozoan or scyphozoan and has a nearly transparent saucer-shaped body and extensible marginal tentacles studded with stinging cells.[15]

 

Given that jellyfish is a common name, its mapping to biological groups is inexact. Some authorities have called the comb jellies[16] and certain salps[16] jellyfish, though other authorities state that neither of these are jellyfish, which they consider should be limited to certain groups within the medusozoa.[17][18]

 

The non-medusozoan clades called jellyfish by some but not all authorities (both agreeing and disagreeing citations are given in each case) are indicated with "???" on the following cladogram of the animal kingdom:

 

Animalia

Porifera

 

Ctenophora (comb jellies)[16] ???[17]

 

Cnidaria (includes jellyfish and other jellies)

 

Bilateria

Protostomia

 

Deuterostomia

Ambulacraria

 

Chordata

Tunicata (includes salps)[16] ???[18]

 

Vertebrata

 

Medusozoan jellyfish

Jellyfish are not a clade, as they include most of the Medusozoa, barring some of the Hydrozoa.[19][20] The medusozoan groups included by authorities are indicated on the following phylogenetic tree by the presence of citations. Names of included jellyfish, in English where possible, are shown in boldface; the presence of a named and cited example indicates that at least that species within its group has been called a jellyfish.

 

Cnidaria

Anthozoa (corals)

 

Polypodiozoa and Myxozoa (parasitic cnidarians)

 

Medusozoa

Acraspeda

Staurozoa (stalked jellyfish)[21]

 

Rhopaliophora

Cubozoa (box jellyfish)[16]

 

Scyphozoa

Discomedusae[16]

 

Coronatae (crown jellyfish)[22]

 

(true jellyfish[19])

Hydrozoa

Aplanulata

 

Siphonophorae

 

Some Leptothecata[16] e.g. crystal jelly

 

Filifera[16] e.g. red paper lantern jellyfish[23]

 

Trachylinae

Limnomedusae, e.g. flower hat jelly[16]

 

Narcomedusae, e.g. cosmic jellyfish[24]

 

Taxonomy

The subphylum Medusozoa includes all cnidarians with a medusa stage in their life cycle. The basic cycle is egg, planula larva, polyp, medusa, with the medusa being the sexual stage. The polyp stage is sometimes secondarily lost. The subphylum include the major taxa, Scyphozoa (large jellyfish), Cubozoa (box jellyfish) and Hydrozoa (small jellyfish), and excludes Anthozoa (corals and sea anemones).[25] This suggests that the medusa form evolved after the polyps.[26] Medusozoans have tetramerous symmetry, with parts in fours or multiples of four.[25]

 

The four major classes of medusozoan Cnidaria are:

 

Scyphozoa are sometimes called true jellyfish, though they are no more truly jellyfish than the others listed here. They have tetra-radial symmetry. Most have tentacles around the outer margin of the bowl-shaped bell, and long, oral arms around the mouth in the center of the subumbrella.[25]

Cubozoa (box jellyfish) have a (rounded) box-shaped bell, and their velarium assists them to swim more quickly. Box jellyfish may be related more closely to scyphozoan jellyfish than either are to the Hydrozoa.[26]

Hydrozoa medusae also have tetra-radial symmetry, nearly always have a velum (diaphragm used in swimming) attached just inside the bell margin, do not have oral arms, but a much smaller central stalk-like structure, the manubrium, with terminal mouth opening, and are distinguished by the absence of cells in the mesoglea. Hydrozoa show great diversity of lifestyle; some species maintain the polyp form for their entire life and do not form medusae at all (such as Hydra, which is hence not considered a jellyfish), and a few are entirely medusal and have no polyp form.[25]

Staurozoa (stalked jellyfish) are characterized by a medusa form that is generally sessile, oriented upside down and with a stalk emerging from the apex of the "calyx" (bell), which attaches to the substrate. At least some Staurozoa also have a polyp form that alternates with the medusoid portion of the life cycle. Until recently, Staurozoa were classified within the Scyphozoa.[25]

There are over 200 species of Scyphozoa, about 50 species of Staurozoa, about 50 species of Cubozoa, and the Hydrozoa includes about 1000–1500 species that produce medusae, but many more species that do not.[27][28]

 

Fossil history

 

Fossil jellyfish, Rhizostomites lithographicus, one of the Scypho-medusae, from the Kimmeridgian (late Jurassic, 157 to 152 mya) of Solnhofen, Germany

 

Stranded scyphozoans on a Cambrian tidal flat at Blackberry Hill, Wisconsin

 

The conulariid Conularia milwaukeensis from the Middle Devonian of Wisconsin

Since jellyfish have no hard parts, fossils are rare. The oldest unambiguous fossil of a free-swimming medusa is Burgessomedusa from the mid Cambrian Burgess Shale of Canada, which is likely either a stem group of box jellyfish (Cubozoa) or Acraspeda (the clade including Staurozoa, Cubozoa, and Scyphozoa). Other claimed records from the Cambrian of China and Utah in the United States are uncertain, and possibly represent ctenophores instead.[29]

 

Anatomy

 

Labelled cross section of a jellyfish

The main feature of a true jellyfish is the umbrella-shaped bell. This is a hollow structure consisting of a mass of transparent jelly-like matter known as mesoglea, which forms the hydrostatic skeleton of the animal.[25] 95% or more of the mesogloea consists of water,[30] but it also contains collagen and other fibrous proteins, as well as wandering amoebocytes which can engulf debris and bacteria. The mesogloea is bordered by the epidermis on the outside and the gastrodermis on the inside. The edge of the bell is often divided into rounded lobes known as lappets, which allow the bell to flex. In the gaps or niches between the lappets are dangling rudimentary sense organs known as rhopalia, and the margin of the bell often bears tentacles.[25]

  

Anatomy of a scyphozoan jellyfish

On the underside of the bell is the manubrium, a stalk-like structure hanging down from the centre, with the mouth, which also functions as the anus, at its tip. There are often four oral arms connected to the manubrium, streaming away into the water below.[31] The mouth opens into the gastrovascular cavity, where digestion takes place and nutrients are absorbed. This is subdivided by four thick septa into a central stomach and four gastric pockets. The four pairs of gonads are attached to the septa, and close to them four septal funnels open to the exterior, perhaps supplying good oxygenation to the gonads. Near the free edges of the septa, gastric filaments extend into the gastric cavity; these are armed with nematocysts and enzyme-producing cells and play a role in subduing and digesting the prey. In some scyphozoans, the gastric cavity is joined to radial canals which branch extensively and may join a marginal ring canal. Cilia in these canals circulate the fluid in a regular direction.[25]

  

Discharge mechanism of a nematocyst

The box jellyfish is largely similar in structure. It has a squarish, box-like bell. A short pedalium or stalk hangs from each of the four lower corners. One or more long, slender tentacles are attached to each pedalium.[32] The rim of the bell is folded inwards to form a shelf known as a velarium which restricts the bell's aperture and creates a powerful jet when the bell pulsates, allowing box jellyfish to swim faster than true jellyfish.[25] Hydrozoans are also similar, usually with just four tentacles at the edge of the bell, although many hydrozoans are colonial and may not have a free-living medusal stage. In some species, a non-detachable bud known as a gonophore is formed that contains a gonad but is missing many other medusal features such as tentacles and rhopalia.[25] Stalked jellyfish are attached to a solid surface by a basal disk, and resemble a polyp, the oral end of which has partially developed into a medusa with tentacle-bearing lobes and a central manubrium with four-sided mouth.[25]

 

Most jellyfish do not have specialized systems for osmoregulation, respiration and circulation, and do not have a central nervous system. Nematocysts, which deliver the sting, are located mostly on the tentacles; true jellyfish also have them around the mouth and stomach.[33] Jellyfish do not need a respiratory system because sufficient oxygen diffuses through the epidermis. They have limited control over their movement, but can navigate with the pulsations of the bell-like body; some species are active swimmers most of the time, while others largely drift.[34] The rhopalia contain rudimentary sense organs which are able to detect light, water-borne vibrations, odour and orientation.[25] A loose network of nerves called a "nerve net" is located in the epidermis.[35][36] Although traditionally thought not to have a central nervous system, nerve net concentration and ganglion-like structures could be considered to constitute one in most species.[37] A jellyfish detects stimuli, and transmits impulses both throughout the nerve net and around a circular nerve ring, to other nerve cells. The rhopalial ganglia contain pacemaker neurones which control swimming rate and direction.[25]

 

In many species of jellyfish, the rhopalia include ocelli, light-sensitive organs able to tell light from dark. These are generally pigment spot ocelli, which have some of their cells pigmented. The rhopalia are suspended on stalks with heavy crystals at one end, acting like gyroscopes to orient the eyes skyward. Certain jellyfish look upward at the mangrove canopy while making a daily migration from mangrove swamps into the open lagoon, where they feed, and back again.[2]

 

Box jellyfish have more advanced vision than the other groups. Each individual has 24 eyes, two of which are capable of seeing colour, and four parallel information processing areas that act in competition,[38] supposedly making them one of the few kinds of animal to have a 360-degree view of its environment.[39]

 

Box jellyfish eye

The study of jellyfish eye evolution is an intermediary to a better understanding of how visual systems evolved on Earth.[40] Jellyfish exhibit immense variation in visual systems ranging from photoreceptive cell patches seen in simple photoreceptive systems to more derived complex eyes seen in box jellyfish.[40] Major topics of jellyfish visual system research (with an emphasis on box jellyfish) include: the evolution of jellyfish vision from simple to complex visual systems), the eye morphology and molecular structures of box jellyfish (including comparisons to vertebrate eyes), and various uses of vision including task-guided behaviors and niche specialization.

 

Evolution

Experimental evidence for photosensitivity and photoreception in cnidarians antecedes the mid 1900s, and a rich body of research has since covered evolution of visual systems in jellyfish.[41] Jellyfish visual systems range from simple photoreceptive cells to complex image-forming eyes. More ancestral visual systems incorporate extraocular vision (vision without eyes) that encompass numerous receptors dedicated to single-function behaviors. More derived visual systems comprise perception that is capable of multiple task-guided behaviors.

 

Although they lack a true brain, cnidarian jellyfish have a "ring" nervous system that plays a significant role in motor and sensory activity. This net of nerves is responsible for muscle contraction and movement and culminates the emergence of photosensitive structures.[40] Across Cnidaria, there is large variation in the systems that underlie photosensitivity. Photosensitive structures range from non-specialized groups of cells, to more "conventional" eyes similar to those of vertebrates.[41] The general evolutionary steps to develop complex vision include (from more ancestral to more derived states): non-directional photoreception, directional photoreception, low-resolution vision, and high-resolution vision.[40] Increased habitat and task complexity has favored the high-resolution visual systems common in derived cnidarians such as box jellyfish.[40]

 

Basal visual systems observed in various cnidarians exhibit photosensitivity representative of a single task or behavior. Extraocular photoreception (a form of non-directional photoreception), is the most basic form of light sensitivity and guides a variety of behaviors among cnidarians. It can function to regulate circadian rhythm (as seen in eyeless hydrozoans) and other light-guided behaviors responsive to the intensity and spectrum of light. Extraocular photoreception can function additionally in positive phototaxis (in planula larvae of hydrozoans),[41] as well as in avoiding harmful amounts of UV radiation via negative phototaxis. Directional photoreception (the ability to perceive direction of incoming light) allows for more complex phototactic responses to light, and likely evolved by means of membrane stacking.[40] The resulting behavioral responses can range from guided spawning events timed by moonlight to shadow responses for potential predator avoidance.[41][42] Light-guided behaviors are observed in numerous scyphozoans including the common moon jelly, Aurelia aurita, which migrates in response to changes in ambient light and solar position even though they lack proper eyes.[41]

 

The low-resolution visual system of box jellyfish is more derived than directional photoreception, and thus box jellyfish vision represents the most basic form of true vision in which multiple directional photoreceptors combine to create the first imaging and spatial resolution. This is different from the high-resolution vision that is observed in camera or compound eyes of vertebrates and cephalopods that rely on focusing optics.[41] Critically, the visual systems of box jellyfish are responsible for guiding multiple tasks or behaviors in contrast to less derived visual systems in other jellyfish that guide single behavioral functions. These behaviors include phototaxis based on sunlight (positive) or shadows (negative), obstacle avoidance, and control of swim-pulse rate.[43]

 

Box jellyfish possess "proper eyes" (similar to vertebrates) that allow them to inhabit environments that lesser derived medusae cannot. In fact, they are considered the only class in the clade Medusozoa that have behaviors necessitating spatial resolution and genuine vision.[41] However, the lens in their eyes are more functionally similar to cup-eyes exhibited in low-resolution organisms, and have very little to no focusing capability.[44][43] The lack of the ability to focus is due to the focal length exceeding the distance to the retina, thus generating unfocused images and limiting spatial resolution.[41] The visual system is still sufficient for box jellyfish to produce an image to help with tasks such as object avoidance.

 

Utility as a model organism

Box jellyfish eyes are a visual system that is sophisticated in numerous ways. These intricacies include the considerable variation within the morphology of box jellyfishes' eyes (including their task/behavior specification), and the molecular makeup of their eyes including: photoreceptors, opsins, lenses, and synapses.[41] The comparison of these attributes to more derived visual systems can allow for a further understanding of how the evolution of more derived visual systems may have occurred, and puts into perspective how box jellyfish can play the role as an evolutionary/developmental model for all visual systems.[45]

 

Characteristics

Box jellyfish visual systems are both diverse and complex, comprising multiple photosystems.[41] There is likely considerable variation in visual properties between species of box jellyfish given the significant inter-species morphological and physiological variation. Eyes tend to differ in size and shape, along with number of receptors (including opsins), and physiology across species of box jellyfish.[41]

 

Box jellyfish have a series of intricate lensed eyes that are similar to those of more derived multicellular organisms such as vertebrates. Their 24 eyes fit into four different morphological categories.[46] These categories consist of two large, morphologically different medial eyes (a lower and upper lensed eye) containing spherical lenses, a lateral pair of pigment slit eyes, and a lateral pair of pigment pit eyes.[43] The eyes are situated on rhopalia (small sensory structures) which serve sensory functions of the box jellyfish and arise from the cavities of the exumbrella (the surface of the body) on the side of the bells of the jellyfish.[41] The two large eyes are located on the mid-line of the club and are considered complex because they contain lenses. The four remaining eyes lie laterally on either side of each rhopalia and are considered simple. The simple eyes are observed as small invaginated cups of epithelium that have developed pigmentation.[47] The larger of the complex eyes contains a cellular cornea created by a mono ciliated epithelium, cellular lens, homogenous capsule to the lens, vitreous body with prismatic elements, and a retina of pigmented cells. The smaller of the complex eyes is said to be slightly less complex given that it lacks a capsule but otherwise contains the same structure as the larger eye.[47]

 

Box jellyfish have multiple photosystems that comprise different sets of eyes.[41] Evidence includes immunocytochemical and molecular data that show photopigment differences among the different morphological eye types, and physiological experiments done on box jellyfish to suggest behavioral differences among photosystems. Each individual eye type constitutes photosystems that work collectively to control visually guided behaviors.[41]

 

Box jellyfish eyes primarily use c-PRCs (ciliary photoreceptor cells) similar to that of vertebrate eyes. These cells undergo phototransduction cascades (process of light absorption by photoreceptors) that are triggered by c-opsins.[48] Available opsin sequences suggest that there are two types of opsins possessed by all cnidarians including an ancient phylogenetic opsin, and a sister ciliary opsin to the c-opsins group. Box jellyfish could have both ciliary and cnidops (cnidarian opsins), which is something not previously believed to appear in the same retina.[41] Nevertheless, it is not entirely evident whether cnidarians possess multiple opsins that are capable of having distinctive spectral sensitivities.[41]

 

Comparison with other organisms

Comparative research on genetic and molecular makeup of box jellyfishes' eyes versus more derived eyes seen in vertebrates and cephalopods focuses on: lenses and crystallin composition, synapses, and Pax genes and their implied evidence for shared primordial (ancestral) genes in eye evolution.[49]

 

Box jellyfish eyes are said to be an evolutionary/developmental model of all eyes based on their evolutionary recruitment of crystallins and Pax genes.[45] Research done on box jellyfish including Tripedalia cystophora has suggested that they possess a single Pax gene, PaxB. PaxB functions by binding to crystallin promoters and activating them. PaxB in situ hybridization resulted in PaxB expression in the lens, retina, and statocysts.[45] These results and the rejection of the prior hypothesis that Pax6 was an ancestral Pax gene in eyes has led to the conclusion that PaxB was a primordial gene in eye evolution, and that the eyes of all organisms likely share a common ancestor.[45]

 

The lens structure of box jellyfish appears very similar to those of other organisms, but the crystallins are distinct in both function and appearance.[49] Weak reactions were seen within the sera and there were very weak sequence similarities within the crystallins among vertebrate and invertebrate lenses.[49] This is likely due to differences in lower molecular weight proteins and the subsequent lack of immunological reactions with antisera that other organisms' lenses exhibit.[49]

 

All four of the visual systems of box jellyfish species investigated with detail (Carybdea marsupialis, Chiropsalmus quadrumanus, Tamoya haplonema and Tripedalia cystophora) have invaginated synapses, but only in the upper and lower lensed eyes. Different densities were found between the upper and lower lenses, and between species.[46] Four types of chemical synapses have been discovered within the rhopalia which could help in understanding neural organization including: clear unidirectional, dense-core unidirectional, clear bidirectional, and clear and dense-core bidirectional. The synapses of the lensed eyes could be useful as markers to learn more about the neural circuit in box jellyfish retinal areas.[46]

 

Evolution as a response to natural stimuli

The primary adaptive responses to environmental variation observed in box jellyfish eyes include pupillary constriction speeds in response to light environments, as well as photoreceptor tuning and lens adaptations to better respond to shifts between light environments and darkness. Interestingly, some box jellyfish species' eyes appear to have evolved more focused vision in response to their habitat.[50]

 

Pupillary contraction appears to have evolved in response to variation in the light environment across ecological niches across three species of box jellyfish (Chironex fleckeri, Chiropsella bronzie, and Carukia barnesi). Behavioral studies suggest that faster pupil contraction rates allow for greater object avoidance,[50] and in fact, species with more complex habitats exhibit faster rates. Ch. bronzie inhabit shallow beach fronts that have low visibility and very few obstacles, thus, faster pupil contraction in response to objects in their environment is not important. Ca. barnesi and Ch. fleckeri are found in more three-dimensionally complex environments like mangroves with an abundance of natural obstacles, where faster pupil contraction is more adaptive.[50] Behavioral studies support the idea that faster pupillary contraction rates assist with obstacle avoidance as well as depth adjustments in response to differing light intensities.

 

Light/dark adaptation via pupillary light reflexes is an additional form of an evolutionary response to the light environment. This relates to the pupil's response to shifts between light intensity (generally from sunlight to darkness). In the process of light/dark adaptation, the upper and lower lens eyes of different box jellyfish species vary in specific function.[43] The lower lens-eyes contain pigmented photoreceptors and long pigment cells with dark pigments that migrate on light/dark adaptation, while the upper-lens eyes play a concentrated role in light direction and phototaxis given that they face upward towards the water surface (towards the sun or moon).[43] The upper lens of Ch. bronzie does not exhibit any considerable optical power while Tr. cystophora (a box jellyfish species that tends to live in mangroves) does. The ability to use light to visually guide behavior is not of as much importance to Ch. bronzie as it is to species in more obstacle-filled environments.[43] Differences in visually guided behavior serve as evidence that species that share the same number and structure of eyes can exhibit differences in how they control behavior.

 

Largest and smallest

Jellyfish range from about one millimeter in bell height and diameter,[51] to nearly 2 metres (6+1⁄2 ft) in bell height and diameter; the tentacles and mouth parts usually extend beyond this bell dimension.[25]

 

The smallest jellyfish are the peculiar creeping jellyfish in the genera Staurocladia and Eleutheria, which have bell disks from 0.5 millimetres (1⁄32 in) to a few millimeters in diameter, with short tentacles that extend out beyond this, which these jellyfish use to move across the surface of seaweed or the bottoms of rocky pools;[51] many of these tiny creeping jellyfish cannot be seen in the field without a hand lens or microscope. They can reproduce asexually by fission (splitting in half). Other very small jellyfish, which have bells about one millimeter, are the hydromedusae of many species that have just been released from their parent polyps;[52] some of these live only a few minutes before shedding their gametes in the plankton and then dying, while others will grow in the plankton for weeks or months. The hydromedusae Cladonema radiatum and Cladonema californicum are also very small, living for months, yet never growing beyond a few mm in bell height and diameter.[53]

  

The lion's mane jellyfish (Cyanea capillata) is one of the largest species.

The lion's mane jellyfish, Cyanea capillata, was long-cited as the largest jellyfish, and arguably the longest animal in the world, with fine, thread-like tentacles that may extend up to 36.5 m (119 ft 9 in) long (though most are nowhere near that large).[54][55] They have a moderately painful, but rarely fatal, sting.[56] The increasingly common giant Nomura's jellyfish, Nemopilema nomurai, found in some, but not all years in the waters of Japan, Korea and China in summer and autumn is another candidate for "largest jellyfish", in terms of diameter and weight, since the largest Nomura's jellyfish in late autumn can reach 2 m (6 ft 7 in) in bell (body) diameter and about 200 kg (440 lb) in weight, with average specimens frequently reaching 0.9 m (2 ft 11 in) in bell diameter and about 150 kg (330 lb) in weight.[57][58] The large bell mass of the giant Nomura's jellyfish[59] can dwarf a diver and is nearly always much greater than the Lion's Mane, whose bell diameter can reach 1 m (3 ft 3 in).[60]

 

The rarely encountered deep-sea jellyfish Stygiomedusa gigantea is another candidate for "largest jellyfish", with its thick, massive bell up to 100 cm (3 ft 3 in) wide, and four thick, "strap-like" oral arms extending up to 6 m (19+1⁄2 ft) in length, very different from the typical fine, threadlike tentacles that rim the umbrella of more-typical-looking jellyfish, including the Lion's Mane.[61]

 

Desmonema glaciale, which lives in the Antarctic region, can reach a very large size (several meters).[62][63] Purple-striped jelly (Chrysaora colorata) can also be extremely long (up to 15 feet).[64]

 

Life history and behavior

See also: Biological life cycle and Developmental biology

Illustration of two life stages of seven jelly species

The developmental stages of scyphozoan jellyfish's life cycle:

1–3 Larva searches for site

4–8 Polyp grows

9–11 Polyp strobilates

12–14 Medusa grows

Life cycle

Jellyfish have a complex life cycle which includes both sexual and asexual phases, with the medusa being the sexual stage in most instances. Sperm fertilize eggs, which develop into larval planulae, become polyps, bud into ephyrae and then transform into adult medusae. In some species certain stages may be skipped.[65]

 

Upon reaching adult size, jellyfish spawn regularly if there is a sufficient supply of food. In most species, spawning is controlled by light, with all individuals spawning at about the same time of day; in many instances this is at dawn or dusk.[66] Jellyfish are usually either male or female (with occasional hermaphrodites). In most cases, adults release sperm and eggs into the surrounding water, where the unprotected eggs are fertilized and develop into larvae. In a few species, the sperm swim into the female's mouth, fertilizing the eggs within her body, where they remain during early development stages. In moon jellies, the eggs lodge in pits on the oral arms, which form a temporary brood chamber for the developing planula larvae.[67]

 

The planula is a small larva covered with cilia. When sufficiently developed, it settles onto a firm surface and develops into a polyp. The polyp generally consists of a small stalk topped by a mouth that is ringed by upward-facing tentacles. The polyps resemble those of closely related anthozoans, such as sea anemones and corals. The jellyfish polyp may be sessile, living on the bottom, boat hulls or other substrates, or it may be free-floating or attached to tiny bits of free-living plankton[68] or rarely, fish[69][70] or other invertebrates. Polyps may be solitary or colonial.[71] Most polyps are only millimetres in diameter and feed continuously. The polyp stage may last for years.[25]

 

After an interval and stimulated by seasonal or hormonal changes, the polyp may begin reproducing asexually by budding and, in the Scyphozoa, is called a segmenting polyp, or a scyphistoma. Budding produces more scyphistomae and also ephyrae.[25] Budding sites vary by species; from the tentacle bulbs, the manubrium (above the mouth), or the gonads of hydromedusae.[68] In a process known as strobilation, the polyp's tentacles are reabsorbed and the body starts to narrow, forming transverse constrictions, in several places near the upper extremity of the polyp. These deepen as the constriction sites migrate down the body, and separate segments known as ephyra detach. These are free-swimming precursors of the adult medusa stage, which is the life stage that is typically identified as a jellyfish.[25][72] The ephyrae, usually only a millimeter or two across initially, swim away from the polyp and grow. Limnomedusae polyps can asexually produce a creeping frustule larval form, which crawls away before developing into another polyp.[25] A few species can produce new medusae by budding directly from the medusan stage. Some hydromedusae reproduce by fission.[68]

 

Lifespan

Little is known of the life histories of many jellyfish as the places on the seabed where the benthic forms of those species live have not been found. However, an asexually reproducing strobila form can sometimes live for several years, producing new medusae (ephyra larvae) each year.[73]

 

An unusual species, Turritopsis dohrnii, formerly classified as Turritopsis nutricula,[74] might be effectively immortal because of its ability under certain circumstances to transform from medusa back to the polyp stage, thereby escaping the death that typically awaits medusae post-reproduction if they have not otherwise been eaten by some other organism. So far this reversal has been observed only in the laboratory.[75]

 

Locomotion

 

Jellyfish locomotion is highly efficient. Muscles in the jellylike bell contract, setting up a start vortex and propelling the animal. When the contraction ends, the bell recoils elastically, creating a stop vortex with no extra energy input.

Using the moon jelly Aurelia aurita as an example, jellyfish have been shown to be the most energy-efficient swimmers of all animals.[76] They move through the water by radially expanding and contracting their bell-shaped bodies to push water behind them. They pause between the contraction and expansion phases to create two vortex rings. Muscles are used for the contraction of the body, which creates the first vortex and pushes the animal forward, but the mesoglea is so elastic that the expansion is powered exclusively by relaxing the bell, which releases the energy stored from the contraction. Meanwhile, the second vortex ring starts to spin faster, sucking water into the bell and pushing against the centre of the body, giving a secondary and "free" boost forward. The mechanism, called passive energy recapture, only works in relatively small jellyfish moving at low speeds, allowing the animal to travel 30 percent farther on each swimming cycle. Jellyfish achieved a 48 percent lower cost of transport (food and oxygen intake versus energy spent in movement) than other animals in similar studies. One reason for this is that most of the gelatinous tissue of the bell is inactive, using no energy during swimming.[77]

 

Ecology

Diet

Jellyfish are, like other cnidarians, generally carnivorous (or parasitic),[78] feeding on planktonic organisms, crustaceans, small fish, fish eggs and larvae, and other jellyfish, ingesting food and voiding undigested waste through the mouth. They hunt passively using their tentacles as drift lines, or sink through the water with their tentacles spread widely; the tentacles, which contain nematocysts to stun or kill the prey, may then flex to help bring it to the mouth.[25] Their swimming technique also helps them to capture prey; when their bell expands it sucks in water which brings more potential prey within reach of the tentacles.[79]

 

A few species such as Aglaura hemistoma are omnivorous, feeding on microplankton which is a mixture of zooplankton and phytoplankton (microscopic plants) such as dinoflagellates.[80] Others harbour mutualistic algae (Zooxanthellae) in their tissues;[25] the spotted jellyfish (Mastigias papua) is typical of these, deriving part of its nutrition from the products of photosynthesis, and part from captured zooplankton.[81][82] The upside-down jellyfish (Cassiopea andromeda) also has a symbiotic relationship with microalgae, but captures tiny animals to supplement their diet. This is done by releasing tiny balls of living cells composed of mesoglea. These use cilia to drive them through water and stinging cells which stun the prey. The blobs also seems to have digestive capabilities.[83]

 

Predation

Other species of jellyfish are among the most common and important jellyfish predators. Sea anemones may eat jellyfish that drift into their range. Other predators include tunas, sharks, swordfish, sea turtles and penguins.[84][85] Jellyfish washed up on the beach are consumed by foxes, other terrestrial mammals and birds.[86] In general however, few animals prey on jellyfish; they can broadly be considered to be top predators in the food chain. Once jellyfish have become dominant in an ecosystem, for example through overfishing which removes predators of jellyfish larvae, there may be no obvious way for the previous balance to be restored: they eat fish eggs and juvenile fish, and compete with fish for food, preventing fish stocks from recovering.[87]

 

Symbiosis

Some small fish are immune to the stings of the jellyfish and live among the tentacles, serving as bait in a fish trap; they are safe from potential predators and are able to share the fish caught by the jellyfish.[88] The cannonball jellyfish has a symbiotic relationship with ten different species of fish, and with the longnose spider crab, which lives inside the bell, sharing the jellyfish's food and nibbling its tissues.[89]

 

Blooms

Main article: Jellyfish bloom

 

Map of population trends of native and invasive jellyfish.[90]

Circles represent data records; larger circles denote higher certainty of findings.

Increase (high certainty)

Increase (low certainty)

Stable/variable

Decrease

No data

Jellyfish form large masses or blooms in certain environmental conditions of ocean currents, nutrients, sunshine, temperature, season, prey availability, reduced predation and oxygen concentration. Currents collect jellyfish together, especially in years with unusually high populations. Jellyfish can detect marine currents and swim against the current to congregate in blooms.[91][92] Jellyfish are better able to survive in nutrient-rich, oxygen-poor water than competitors, and thus can feast on plankton without competition. Jellyfish may also benefit from saltier waters, as saltier waters contain more iodine, which is necessary for polyps to turn into jellyfish. Rising sea temperatures caused by climate change may also contribute to jellyfish blooms, because many species of jellyfish are able to survive in warmer waters.[93] Increased nutrients from agricultural or urban runoff with nutrients including nitrogen and phosphorus compounds increase the growth of phytoplankton, causing eutrophication and algal blooms. When the phytoplankton die, they may create dead zones, so-called because they are hypoxic (low in oxygen). This in turn kills fish and other animals, but not jellyfish,[94] allowing them to bloom.[95][96] Jellyfish populations may be expanding globally as a result of land runoff and overfishing of their natural predators.[97][98] Jellyfish are well placed to benefit from disturbance of marine ecosystems. They reproduce rapidly; they prey upon many species, while few species prey on them; and they feed via touch rather than visually, so they can feed effectively at night and in turbid waters.[99][100] It may be difficult for fish stocks to re-establish themselves in marine ecosystems once they have become dominated by jellyfish, because jellyfish feed on plankton, which includes fish eggs and larvae.[101][102][96]

  

Moon jellyfishes can live in northern hemisphere seas,[103][104] such as the Baltic Sea.[105][106]

As suspected at the turn of this century, [107][108] jellyfish blooms are increasing in frequency. Between 2013 and 2020 the Mediterranean Science Commission monitored on a weekly basis the frequency of such outbreaks in coastal waters from Morocco to the Black Sea, revealing a relatively high frequency of these blooms nearly all year round, with peaks observed from March to July and often again in the autumn. The blooms are caused by different jellyfish species, depending on their localisation within the Basin: one observes a clear dominance of Pelagia noctiluca and Velella velella outbreaks in the western Mediterranean, of Rhizostoma pulmo and Rhopilema nomadica outbreaks in the eastern Mediterranean, and of Aurelia aurita and Mnemiopsis leidyi outbreaks in the Black Sea.[109]

 

Some jellyfish populations that have shown clear increases in the past few decades are invasive species, newly arrived from other habitats: examples include the Black Sea, Caspian Sea, Baltic Sea, central and eastern Mediterranean, Hawaii, and tropical and subtropical parts of the West Atlantic (including the Caribbean, Gulf of Mexico and Brazil).[105][106]

 

Jellyfish blooms can have significant impact on community structure. Some carnivorous jellyfish species prey on zooplankton while others graze on primary producers.[110] Reductions in zooplankton and ichthyoplankton due to a jellyfish bloom can ripple through the trophic levels. High-density jellyfish populations can outcompete other predators and reduce fish recruitment.[111] Increased grazing on primary producers by jellyfish can also interrupt energy transfer to higher trophic levels.[112]

 

During blooms, jellyfish significantly alter the nutrient availability in their environment. Blooms require large amounts of available organic nutrients in the water column to grow, limiting availability for other organisms.[113] Some jellyfish have a symbiotic relationship with single-celled dinoflagellates, allowing them to assimilate inorganic carbon, phosphorus, and nitrogen creating competition for phytoplankton.[113] Their large biomass makes them an important source of dissolved and particulate organic matter for microbial communities through excretion, mucus production, and decomposition.[90][114] The microbes break down the organic matter into inorganic ammonium and phosphate. However, the low carbon availability shifts the process from production to respiration creating low oxygen areas making the dissolved inorganic nitrogen and phosphorus largely unavailable for primary production.

 

These blooms have very real impacts on industries. Jellyfish can outcompete fish by utilizing open niches in over-fished fisheries.[115] Catch of jellyfish can strain fishing gear and lead to expenses relating to damaged gear. Power plants have been shut down due to jellyfish blocking the flow of cooling water.[116] Blooms have also been harmful for tourism, causing a rise in stings and sometimes the closure of beaches.[117]

 

Jellyfish form a component of jelly-falls, events where gelatinous zooplankton fall to the seafloor, providing food for the benthic organisms there.[118] In temperate and subpolar regions, jelly-falls usually follow immediately after a bloom.[119]

 

Habitats

 

A common Scyphozoan jellyfish seen near beaches in the Florida Panhandle

Most jellyfish are marine animals, although a few hydromedusae inhabit freshwater. The best known freshwater example is the cosmopolitan hydrozoan jellyfish, Craspedacusta sowerbii. It is less than an inch (2.5 cm) in diameter, colorless and does not sting.[120] Some jellyfish populations have become restricted to coastal saltwater lakes, such as Jellyfish Lake in Palau.[121] Jellyfish Lake is a marine lake where millions of golden jellyfish (Mastigias spp.) migrate horizontally across the lake daily.[82]

 

Although most jellyfish live well off the ocean floor and form part of the plankton, a few species are closely associated with the bottom for much of their lives and can be considered benthic. The upside-down jellyfish in the genus Cassiopea typically lie on the bottom of shallow lagoons where they sometimes pulsate gently with their umbrella top facing down. Even some deep-sea species of hydromedusae and scyphomedusae are usually collected on or near the bottom. All of the stauromedusae are found attached to either seaweed or rocky or other firm material on the bottom.[122]

 

Some species explicitly adapt to tidal flux. In Roscoe Bay, jellyfish ride the current at ebb tide until they hit a gravel bar, and then descend below the current. They remain in still waters until the tide rises, ascending and allowing it to sweep them back into the bay. They also actively avoid fresh water from mountain snowmelt, diving until they find enough salt.

  

Parasites

Jellyfish are hosts to a wide variety of parasitic organisms. They act as intermediate hosts of endoparasitic helminths, with the infection being transferred to the definitive host fish after predation. Some digenean trematodes, especially species in the family Lepocreadiidae, use jellyfish as their second intermediate hosts. Fish become infected by the trematodes when they feed on infected jellyfish.

 

Relation to humans

Jellyfish have long been eaten in some parts of the world. Fisheries have begun harvesting the American cannonball jellyfish, Stomolophus meleagris, along the southern Atlantic coast of the United States and in the Gulf of Mexico for export to Asia.

 

Jellyfish are also harvested for their collagen, which is being investigated for use in a variety of applications including the treatment of rheumatoid arthritis.

 

Aquaculture and fisheries of other species often suffer severe losses – and so losses of productivity – due to jellyfish.

 

Products

Main article: Jellyfish as food

In some countries, including China, Japan, and Korea, jellyfish are a delicacy. The jellyfish is dried to prevent spoiling. Only some 12 species of scyphozoan jellyfish belonging to the order Rhizostomeae are harvested for food, mostly in southeast Asia. Rhizostomes, especially Rhopilema esculentum in China (海蜇 hǎizhé, 'sea stingers') and Stomolophus meleagris (cannonball jellyfish) in the United States, are favored because of their larger and more rigid bodies and because their toxins are harmless to humans.

 

Traditional processing methods, carried out by a jellyfish master, involve a 20- to 40-day multi-phase procedure in which, after removing the gonads and mucous membranes, the umbrella and oral arms are treated with a mixture of table salt and alum, and compressed. Processing makes the jellyfish drier and more acidic, producing a crisp texture. Jellyfish prepared this way retain 7–10% of their original weight, and the processed product consists of approximately 94% water and 6% protein. Freshly processed jellyfish has a white, creamy color and turns yellow or brown during prolonged storage.

 

In China, processed jellyfish are desalted by soaking in water overnight and eaten cooked or raw. The dish is often served shredded with a dressing of oil, soy sauce, vinegar and sugar, or as a salad with vegetables. In Japan, cured jellyfish are rinsed, cut into strips and served with vinegar as an appetizer. Desalted, ready-to-eat products are also available.

 

Biotechnology

The hydromedusa Aequorea victoria was the source of green fluorescent protein, studied for its role in bioluminescence and later for use as a marker in genetic engineering.

Pliny the Elder reported in his Natural History that the slime of the jellyfish "Pulmo marinus" produced light when rubbed on a walking stick.

 

In 1961, Osamu Shimomura extracted green fluorescent protein (GFP) and another bioluminescent protein, called aequorin, from the large and abundant hydromedusa Aequorea victoria, while studying photoproteins that cause bioluminescence in this species. Three decades later, Douglas Prasher sequenced and cloned the gene for GFP. Martin Chalfie figured out how to use GFP as a fluorescent marker of genes inserted into other cells or organisms. Roger Tsien later chemically manipulated GFP to produce other fluorescent colors to use as markers. In 2008, Shimomura, Chalfie and Tsien won the Nobel Prize in Chemistry for their work with GFP. Man-made GFP became widely used as a fluorescent tag to show which cells or tissues express specific genes. The genetic engineering technique fuses the gene of interest to the GFP gene. The fused DNA is then put into a cell, to generate either a cell line or (via IVF techniques) an entire animal bearing the gene. In the cell or animal, the artificial gene turns on in the same tissues and the same time as the normal gene, making a fusion of the normal protein with GFP attached to the end, illuminating the animal or cell reveals what tissues express that protein—or at what stage of development. The fluorescence shows where the gene is expressed.

 

Aquarium display

Jellyfish are displayed in many public aquariums. Often the tank's background is blue and the animals are illuminated by side light, increasing the contrast between the animal and the background. In natural conditions, many jellies are so transparent that they are nearly invisible. Jellyfish are not adapted to closed spaces. They depend on currents to transport them from place to place. Professional exhibits as in the Monterey Bay Aquarium feature precise water flows, typically in circular tanks to avoid trapping specimens in corners. The outflow is spread out over a large surface area and the inflow enters as a sheet of water in front of the outflow, so the jellyfish do not get sucked into it. As of 2009, jellyfish were becoming popular in home aquariums, where they require similar equipment.

 

Stings

Jellyfish are armed with nematocysts, a type of specialized stinging cell. Contact with a jellyfish tentacle can trigger millions of nematocysts to pierce the skin and inject venom, but only some species' venom causes an adverse reaction in humans. In a study published in Communications Biology, researchers found a jellyfish species called Cassiopea xamachana which when triggered will release tiny balls of cells that swim around the jellyfish stinging everything in their path. Researchers described these as "self-propelling microscopic grenades" and named them cassiosomes.

 

The effects of stings range from mild discomfort to extreme pain and death. Most jellyfish stings are not deadly, but stings of some box jellyfish (Irukandji jellyfish), such as the sea wasp, can be deadly. Stings may cause anaphylaxis (a form of shock), which can be fatal. Jellyfish kill 20 to 40 people a year in the Philippines alone. In 2006 the Spanish Red Cross treated 19,000 stung swimmers along the Costa Brava.

 

Vinegar (3–10% aqueous acetic acid) may help with box jellyfish stings but not the stings of the Portuguese man o' war. Clearing the area of jelly and tentacles reduces nematocyst firing. Scraping the affected skin, such as with the edge of a credit card, may remove remaining nematocysts. Once the skin has been cleaned of nematocysts, hydrocortisone cream applied locally reduces pain and inflammation. Antihistamines may help to control itching. Immunobased antivenins are used for serious box jellyfish stings.

 

In Elba Island and Corsica dittrichia viscosa is now used by residents and tourists to heal stings from jellyfish, bees and wasps pressing fresh leaves on the skin with quick results.

 

Mechanical issues

Jellyfish in large quantities can fill and split fishing nets and crush captured fish. They can clog cooling equipment, having disabled power stations in several countries; jellyfish caused a cascading blackout in the Philippines in 1999, as well as damaging the Diablo Canyon Power Plant in California in 2008. They can also stop desalination plants and ships' engines.

The BMW i8, first introduced as the BMW Concept Vision Efficient Dynamics, is a plug-in hybrid sports car developed by BMW. The 2015 model year BMW i8 has a 7.1 kWh lithium-ion battery pack that delivers an all-electric range of 37 km (23 mi) under the New European Driving Cycle (NEDC).[5] Under the United States Environmental Protection Agency (EPA) cycle, the range in EV mode is 24 km (15 mi) with a small amount of gasoline consumption.

 

The BMW i8 can go from 0–100 km/h (0 to 60 mph) in 4.4 seconds and has a top speed of 250 km/h (155 mph). The BMW i8 has a fuel efficiency of 2.1 L/100 km (134.5 mpg-imp; 112.0 mpg-US) under the NEDC test with carbon emissions of 49 g/km. EPA rated the i8 combined fuel economy at 76 equivalent (MPG-equivalent) (3.1 L gasoline equivalent/100 km; 91 mpg-imp gasoline equivalent).

 

The initial turbodiesel concept car was unveiled at the 2009 International Motor Show Germany. The production version of the BMW i8 was unveiled at the 2013 Frankfurt Motor Show. The i8 was released in Germany in June 2014. Deliveries to retail customers in the U.S. began in August 2014. Global cumulative sales totaled almost 4,500 units through June 2015.

 

History

 

The i8 is part of BMW's "Project i" and it is being marketed as a new brand, BMW i, sold separately from BMW or Mini. The BMW i3, launched for retail customers in Europe in the fourth quarter of 2013, was the first model of the i brand available in the market, and it was followed by the i8, released in Germany in June 2014 as a 2015 model year. Other i models are expected to follow.

 

The initial turbodiesel concept car was unveiled at the 2009 International Motor Show Germany, In 2010, BMW announced the mass production of the Concept Vision Efficient Dynamics in Leipzig beginning in 2013 as the BMW i8. The BMW i8 gasoline-powered concept car destined for production was unveiled at the 2011 Frankfurt Motor Show. The production version of the BMW i8 was unveiled at the 2013 International Motor Show Germany. The following are the concept and pre-production models developed by BMW that precedeed the production version.

 

BMW Vision EfficientDynamics (2009)

 

BMW Vision EfficientDynamics concept car is a plug-in hybrid with a three cylinder turbodiesel engine. Additionally, there are two electric motors with 139 horsepower. It allows an acceleration to 100 km/h (62 mph) in 4.8 seconds and an electronically limited top speed of 250 km/h (160 mph).

 

According to BMW, the average fuel consumption in the EU test cycle (KV01) is 3.76 liters/100 kilometers, (75.1 mpg imp), and has a carbon dioxide emission rating of 99 grams per kilometer (1,3 l/100 km and 33g CO2/km ; EU-PHEV ECE-R101). The estimated all-electric range is 50 km (31 mi), and the 24-liter petrol tank extends the total vehicle range to up to 700 km (430 mi). The lightweight chassis is made mainly from aluminum. The windshield, top, doors and fenders are made from polycarbonate glass, with the body having a drag coefficient of 0.26.

 

The designers in charge of the BMW Vision EfficientDynamics Concept were Mario Majdandzic, Exterior Design and Jochen Paesen, Interior Design.

 

The vehicle was unveiled in 2009 International Motor Show Germany, followed by Auto China 2010.

 

BMW i8 Concept (2011)

 

BMW i8 Concept plug-in hybrid electric vehicle includes an electric motor located in the front axle powering the front wheels rated 96 kW (131 PS; 129 hp) and 250 N·m (184 lb·ft), a turbocharged 1.5-liter 3-cylinder gasoline engine driving rear wheels rated 164 kW (223 PS; 220 hp) and 300 N·m (221 lb·ft) of torque, with combined output of 260 kW (354 PS; 349 hp) and 550 N·m (406 lb·ft), a 7.2 kWh (26 MJ) lithium-ion battery pack that allows an all-electric range of 35 km (22 mi). All four wheels provide regenerative braking. The location of the battery pack in the energy tunnel gives the vehicle a low centre of gravity, enhancing its dynamics. Its top speed is electronically limited to 250 km/h (160 mph) and is expected to go from 0 to 100 km/h (0 to 60 mph) in 4.6 seconds. Under normal driving conditions the i8 is expected to deliver 80 mpg-US (2.9 L/100 km; 96 mpg-imp) under the European cycle. A full charge of the battery will take less than 2 hours using 220V. The positioning of the motor and engine over the axles results in optimum 50/50 weight distribution.

 

The vehicle was unveiled at the 2011 International Motor Show Germany, followed by CENTER 548 in New York City, 42nd Tokyo Motor Show 2011, 82nd Geneva Motor Show 2012, BMW i Born Electric Tour at the Palazzo delle Esposizioni at Via Nazionale 194 in Rome, Auto Shanghai 2013.

 

This concept car was featured in the film Mission: Impossible – Ghost Protocol.

 

BMW i8 Concept Spyder (2012)

 

The BMW i8 Concept Spyder included a slightly shorter wheelbase and overall length over the BMW i8 Concept, carbon-fibre-reinforced plastic (CFRP) Life module, drive modules made primarily from aluminium components, interlocking of surfaces and lines, 8.8-inch (22.4 cm) screen display, off-white outer layer, orange tone naturally tanned leather upholstery.

 

The vehicle was unveiled in Auto China 2012 in Beijing and won Concept Car of the Year, followed by 83rd Geneva International Motor Show 2013.

 

The designer of the BMW i8 Concept Spyder was Richard Kim.

 

BMW i8 coupe prototype (2013)

 

The design of the BMW i8 coupe prototype was based on the BMW i8 Concept. The BMW i8 prototype has an average fuel efficiency of less than 2.5 L/100 km (113.0 mpg-imp; 94.1 mpg-US) under the New European Driving Cycle with carbon emissions of less than 59 g/km. The i8 with its carbon-fiber-reinforced plastic (CFRP) passenger cell lightweight, aerodynamically optimized body, and BMW eDrive technology offers the dynamic performance of a sports car, with an expected 0–100 km (0–60 mi) sprint time of less than 4.5 seconds using both power sources. The plug-in hybrid system of the BMW i8 comprises a three-cylinder, 1.5-liter BMW TwinPower turbo gasoline engine combined with BMW eDrive technology used in the BMW i3 and develops maximum power of 170 kW (230 hp). The BMW i8 is the first BMW production model to be powered by a three-cylinder gasoline engine and the resulting specific output of 115 kW (154 hp) per liter of displacement is on a par with high-performance sports car engines and is the highest of any engine produced by the BMW Group.

 

The BMW i8's second power source is a hybrid synchronous electric motor specially developed and produced by the BMW Group for BMW i. The electric motor develops maximum power of 131 hp (96 kW) and produces its maximum torque of around 320 N·m (240 lbf·ft) from standstill. Typical of an electric motor, responsive power is instantly available when starting and this continues into the higher load ranges. As well as providing a power boost to assist the gasoline engine during acceleration, the electric motor can also power the vehicle by itself. Top speed in electric mode is approximately 120 km/h (75 mph), with a maximum driving range of up to 35 km (22 mi). Linear acceleration is maintained even at higher speeds since the interplay between the two power sources efficiently absorbs any power flow interruptions when shifting gears. The BMW i8 has an electronically controlled top speed of 250 km (160 mi), which can be reached and maintained when the vehicle operates solely on the gasoline engine. The model-specific version of the high-voltage 7.2 lithium-ion battery has a liquid cooling system and can be recharged at a conventional household power socket, at a BMW i Wallbox or at a public charging station. In the US a full recharge takes approximately 3.5 hours from a conventional 120V, 12 amp household circuit or approximately 1.5 hours from a 220V Level 2 charger.

 

The driver can also select several driving modes: SPORT, COMFORT and ECO PRO. Using the gear selector, the driver can either select position D for automated gear selection or can switch to SPORT mode. SPORT mode offers manual gear selection and at the same time switches to very sporty drive and suspension settings. In SPORT mode, the engine and electric motor deliver extra performance, accelerator response is faster and the power boost from the electric motor is maximized. And to keep the battery topped up, SPORT mode also activates maximum energy recuperation during overrun and braking as the electric motor’s generator function, which recharges the battery using kinetic energy, switches to a more powerful setting. The Driving Experience Control switch on the center console offers a choice of two settings. On starting, COMFORT mode is activated, which offers a balance between sporty performance and fuel efficiency, with unrestricted access to all convenience functions. Alternatively, the ECO PRO mode can be engaged, which, on the BMW i8 as on other models, supports an efficiency-optimized driving style. On this mode the powertrain controller coordinates the cooperation between the gasoline engine and the electric motor for maximum fuel economy. On deceleration, the intelligent energy management system automatically decides, in line with the driving situation and vehicle status, whether to recuperate braking energy or to coast with the powertrain disengaged. At the same time, ECO PRO mode also programs electrical convenience functions such as the air conditioning, seat heating and heated mirrors to operate at minimum power consumption, but without compromising safety. The maximum driving range of the BMW i8 on a full fuel tank and with a fully charged battery is more than 500 km (310 mi) in COMFORT mode, which can be increased by up to 20% in ECO PRO mode. The BMW i8’s ECO PRO mode can also be used during all-electric operation. The vehicle is then powered solely by the electric motor. Only if the battery charge drops below a given level, or under sudden intense throttle application such as kickdown, is the internal combustion engine automatically activated.

 

The vehicle was unveiled in BMW Group's Miramas test track in France.

 

Production version

 

The production BMW i8 was designed by Benoit Jacob. The production version was unveiled at the 2013 International Motor Show Germany, followed by 2013 Les Voiles de Saint-Tropez. It features butterfly doors, head-up display, rear-view cameras and partially false engine noise. Series production of customer vehicles began in April 2014. It is the first production car with laser headlights, reaching further than LED lights.

 

The i8 has a low vehicle weight of 1,485 kg (3,274 lb) (DIN kerb weight) and a low drag coefficient (Cd) of 0.26. In all-electric mode the BMW i8 has a top speed of 120 km/h (75 mph). In Sport mode the i8 delivers a mid-range acceleration from 80 to 120 km/h (50 to 75 mph) in 2.6 seconds. The electronically controlled top speed is 250 km/h (160 mph).

 

Range and fuel economy[edit]

The production i8 has a 7.1 kWh lithium-ion battery pack with a usable capacity of 5.2 kWh and intelligent energy management that delivers an all-electric range of 37 km (23 mi) under the NEDC cycle. Under the EPA cycle, the range in EV mode is 15 mi (24 km), with a gasoline consumption of 0.1 gallons per 100 mi, and as a result, EPA's all-electric range is zero. The total range is 330 mi (530 km).

 

The production version has a fuel efficiency of 2.1 L/100 km (134.5 mpg-imp; 112.0 mpg-US) under the NEDC test with carbon emissions of 49 g/km.[5] Under EPA cycle, the i8 combined fuel economy in EV mode was rated 76 equivalent (MPG-equivalent) (3.1 L gasoline equivalent/100 km; 91 mpg-imp gasoline equivalent), with an energy consumption of 43 kW-hrs/100 mi and gasoline consumption of 0.1 gal-US/100 mi. The combined fuel economy when running only with gasoline is 28 mpg-US (8.4 L/100 km; 34 mpg-imp), 28 mpg-US (8.4 L/100 km; 34 mpg-imp) for city driving, and 29 mpg-US (8.1 L/100 km; 35 mpg-imp) in highway.

 

The U.S. Environmental Protection Agency's 2014 edition of the "Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends" introduced utility factors for plug-in hybrids to represent the percentage of miles that will be driven using electricity by an average driver, in electric only or blended modes. The BMW i8 has a utility factor in EV mode of 37%, compared with 83% for the BMW i3 REx, 66% for the Chevrolet Volt, 65% for the Cadillac ELR, 45% for the Ford Energi models, 43% for the McLaren P1, 39% for the Porsche Panamera S E-Hybrid, and 29% for the Toyota Prius PHV.

 

[Text from Wikipedia]

 

en.wikipedia.org/wiki/BMW_i8

 

This Lego miniland-scale BMW i8 has been created for Flickr LUGNuts' 94th Build Challenge, - "Appease the Elves Summer Automobile Build-off (Part 2)", - a design challenge combining the resources of LUGNuts, TheLegoCarBlog (TLCB) and Head Turnerz.

Once Iowa Traction (IATR) 50 gets back to the yard. his ethanol cars are immediately emptied onto trucks for their final destination. They'll soon be ready to hand back to the U.P as empties.

Not the most efficient turn, but a good photo op for my friends' son, who has grown so much since last summer, I might not have recognized him without a name on the cap.

Tips for an Efficient Computer t.co/NVClnE1IhP t.co/wzAtEOePRx (via Twitter twitter.com/ProSaverApp/status/799336317951700992)

YT74 EFO is an Irizar I6S Efficient new to Craig, Campbeltown in September 2024 as their number 12425. It is one of six triaxles coaches delivered for Scottish Citylink routes linking Glasgow with Argyll.

 

It is seen here in Oban having worked the Citylink service 976 from Glasgow

Moving efficiently around orbital spaceports and also on low gravity moons, these spacecraft were a practical and popular product from Llwyngwril Space Systems. Large engines and a big magno-clamp load bed enabled a wide variety of loads to be quickly and easily shifted around loading bays and warehouses. The large area under the load bed was given over to fuel tanks, meaning that the ship only had be re-fuelled when its pilots changed shift.

 

With centuries of hard use, these workhorses gradually became increasingly unreliable. Obsolescence also meant that spare parts became hard to find. The crews of the ships generally replaced one of the consonants in the ships' name, due to poor rates of availability and safety.

 

********************************

 

Inspired by this and built months ago but I've got a Lego photography backlog.

 

conceptships.blogspot.co.uk/2017/06/lifter-from-alien-cov...

Vindolanda was a Roman auxiliary fort (castrum) just south of Hadrian's Wall in northern England, which it originally pre-dated. Archaeological excavations of the site show it was under Roman occupation from roughly 85 AD to 370 AD. Located near the modern village of Bardon Mill in Northumberland, it guarded the Stanegate, the Roman road from the River Tyne to the Solway Firth. It is noted for the Vindolanda tablets, a set of wooden leaf-tablets that were, at the time of their discovery, the oldest surviving handwritten documents in Britain.

 

The first post-Roman record of the ruins at Vindolanda was made by the antiquarian William Camden, in his Britannia (1586). Occasional travellers reached the site over the next two hundred years, and the accounts they left predate much of the stone-stealing that has damaged the site. The military Thermae (bath-house) was still partly roofed when Christopher Hunter visited the site in 1702. In about 1715 an excise officer named John Warburton found an altar there, which he removed. In 1814 the first real archaeological work was begun, by the Rev. Anthony Hedley.

 

Hedley died in 1835, before writing up his discoveries. Little more was done for a long time, although in 1914 a workman found another altar at the site, set up by the civilians living at the fort in honour of the Divine House and Vulcan. Several names for the site are used in the early records, including "Chesters on Caudley", "Little Chesters", "The Bower" and "Chesterholm"; the altar found in 1914 confirmed that the Roman name for the site was "Vindolanda", which had been in dispute as one early source referred to it as "Vindolana".

 

The garrison consisted of infantry or cavalry auxilia, not components of Roman legions. From the early third century, this was the Cohors IV Gallorum equitata also known as the Fourth Cohort of Gauls. It had been presumed that this title was, by this time, purely nominal, with auxiliary troops being recruited locally but an inscription found in a recent season of excavations suggests that native Gauls were still to be found in the regiment and that they liked to distinguish themselves from British soldiers. The inscription reads:

 

CIVES GALLI

DE GALLIAE

CONCORDES

QUE BRITANNI

 

A translation of this is "The troops from Gaul dedicate this statue to the goddess Gallia with the full support of the British-born troops".

 

Among the troops were Basque-speaking soldiers of the Varduli.

 

The earliest Roman forts at Vindolanda were built of wood and turf. The remains are now buried as much as 13 ft (4 m) deep in the anoxic waterlogged soil. There are five timber forts, built (and demolished) one after the other. The first, a small fort, was probably built by the 1st Cohort of Tungrians about 85 AD. By about 95 AD this was replaced by a larger wooden fort built by the 9th Cohort of Batavians, a mixed infantry-cavalry unit of about 1,000 men. That fort was repaired in about 100 AD under the command of the Roman prefect Flavius Cerialis. When the 9th Cohort of Batavians left in 105 AD, their fort was demolished. The 1st Cohort of Tungrians returned to Vindolanda, built a larger wooden fort and remained here until Hadrian's Wall was built around 122 AD, when they moved, most likely to Vercovicium (Housesteads Roman Fort) on the wall, about two miles to the north-east of Vindolanda.

 

Soon after Hadrian's Wall was built, most of its men were moved north to the Antonine Wall. A stone fort was built at Vindolanda, possibly for the 2nd Cohort of Nervians. From 208 to 211 AD, there was a major rebellion against Rome in Britain, and the Emperor Septimius Severus led an army to Britain to cope with it personally. The old stone fort was demolished, and replaced by an unconventional set of army buildings on the west, and an unusual array of many round stone huts where the old fort had been. Some of these circular huts are visible by the north and the southwest walls of the final stone fort. The Roman army may have built these to accommodate families of British farmers in this unsettled period. Septimius Severus died at York in 211 AD; his sons paid off the rebels and left for Rome. The stone buildings were demolished, and a large new stone fort was built where the huts had been, for the 4th Cohort of Gauls.

 

A vicus, a self-governing village, developed to the west of the fort. The vicus contains several rows of buildings, each containing several one-room chambers. Most are not connected to the existing drainage system. The one that does was perhaps a butchery where, for health reasons, an efficient drain would have been important. A stone altar found in 1914 (and exhibited in the museum) proves that the settlement was officially a vicus and that it was named Vindolanda. To the south of the fort is a thermae (a large imperial bath complex), that would have been used by many of the individuals on the site. The later stone fort, and the adjoining village, remained in use until about 285 AD, when it was largely abandoned for unknown reasons.

 

About 300 AD, the fort was again rebuilt, but the vicus was not reoccupied, so most likely the area remained too unsafe for life outside the defended walls of the fort. In about 370, the fort was roughly repaired, perhaps by irregular soldiers. There is no evidence for the traditional view that Roman occupation ended suddenly in 410; it may have declined slowly.

 

In the 1930s, the house at Chesterholm where the museum is now located was purchased by archaeologist Eric Birley, who was interested in excavating the site. The excavations have been continued by his sons, Robin and Anthony, and his grandson, Andrew Birley, into the present day. They are undertaken each summer, and some of the archaeological deposits reach depths of six metres. The anoxic conditions at these depths have preserved thousands of artefacts, such as 850 ink tablets and over 160 boxwood combs, that normally disintegrate in the ground, thus providing an opportunity to gain a fuller understanding of Roman life – military and otherwise – on the northern frontier. The study of these ink tablets shows a literacy among both the high born who there, as with the party invitation from one officer's wife to another and with soldiers and their families who send care packages with notes on the contents of the packages. A study of spindle whorls from the north-western quadrant has indicated the presence of spinners of low- and high- status in the fort in the 3rd and 4th century AD. Along with ongoing excavations (in season) and excavated remains, a full-size replica of a section of Hadrian's Wall in both stone and turf can be seen on the site. As of yet there is no reconstruction of the Vallum.

 

Nearly 2000-year-old Roman boxing gloves were uncovered at Vindolanda in 2017 by the Vindolanda Trust experts led by Dr Andrew Birley. According to the Guardian, being similar in style and function to the full-hand modern boxing gloves, these two gloves found at Vindolanda look like leather bands and date back to 120 AD. It is suggested that, based on their difference from gladiator gloves, warriors using this type of gloves had no purpose to kill each other. These gloves were probably used in a sport for promoting fighting skills. The gloves are currently displayed at Vindolanda's museum. According to Birley, they are not part of a matching pair:

 

The larger of the two gloves is cut from a single piece of leather and was folded into a pouch configuration, the extending leather at each side were slotted into one another forming a complete oval shape creating an inner hole into which a hand could still easily be inserted. The glove was packed with natural material acting as a shock absorber.

 

Recent excavations have been accompanied by new archaeological methodologies. 3-D imaging has been used to investigate the use of an ox cranium in target practice.

 

In 2021, a carved sandstone artifact was discovered a few inches below the floor of the fort. It depicts a nude warrior or deity before a horse or similar animal. Early interpretations point to the figure being of a Roman deity, perhaps of Mars or Mercury.

 

In 2023 February, a 2,000 year-old disembodied 6.3 inches long wooden phallus toy was revealed, according to the research published in the journal Antiquity.

 

In addition to the older initial findings of ink tablets, shoes and combs, several more artifacts and discoveries of note have been covered by the media. In 2017, the British newspaper The Guardian focused on a discovery of cavalry barracks that were uncovered during the excavation season that held a large number of artifacts including swords, ink tablets, textiles, arrowheads, and other military paraphernalia. Relative dating of the barracks had determined that they were built around 105 AD. The Guardian also publicized the discovery of a cache of 25 ink tablets found earlier in the 2017 season. The tablets were discovered in a trench in one of the earliest layers of the fort, dating to the 1st century AD. This discovery was considered to be the second-largest discovery of ink tablets in the world, with the first being a cache that was also discovered at Vindolanda in 1992.

 

In the 2014 excavation season, BBC ran a story about the discovery of one of the few surviving examples of a wooden toilet seat to be found in the Roman Empire. In the same year, they also recorded the discovery of the only (very old, very worn) gold coin ever to be found on the site with a mint date of 64 or 65 AD, lying in a site layer dating to the 4th century AD.

 

In 2010, the BBC announced the discovery of the remains of a child between the ages of 8 and 10 years, which was uncovered in a shallow pit in a barrack room in a position suggesting that its arms may have been bound. Further archaeological analysis indicated that it could be female. She is believed to have died about 1,800 years ago.

 

Another find publicised on the BBC website in 2006 was a bronze and silver fibula modelled with the figure of Mars, with the name Quintus Sollonius punched into its surface.

 

In 2020, archaeologists discovered a 5th-century chalice covered in religious iconography within a collapsed church structure. The images include crosses, angels, a smiling priestly figure holding a crook, fish, a whale, ships, the Greek letters chi-rho. In addition, the chalice bears scripts written in Latin, Greek, and possibly Ogham.

 

The Vindolanda site museum, also known as Chesterholm Museum, conserves and displays finds from the site. The museum is set in gardens, which include full-sized reconstructions of a Roman temple, a Roman shop, a Roman house and Northumbrian croft, all with audio presentations. Exhibits include Roman boots, shoes, armour, jewellery and coins, infrared photographs of the writing tablets and, from 2011, a small selection of the tablets themselves, on loan from the British Museum. 2011 saw the reopening of the museum at Vindolanda, and also the Roman Army Museum at Magnae Carvetiorum (Carvoran), refurbished with a grant from the Heritage Lottery Fund.

 

Roman Britain was the territory that became the Roman province of Britannia after the Roman conquest of Britain, consisting of a large part of the island of Great Britain. The occupation lasted from AD 43 to AD 410.

 

Julius Caesar invaded Britain in 55 and 54 BC as part of his Gallic Wars. According to Caesar, the Britons had been overrun or culturally assimilated by the Belgae during the British Iron Age and had been aiding Caesar's enemies. The Belgae were the only Celtic tribe to cross the sea into Britain, for to all other Celtic tribes this land was unknown. He received tribute, installed the friendly king Mandubracius over the Trinovantes, and returned to Gaul. Planned invasions under Augustus were called off in 34, 27, and 25 BC. In 40 AD, Caligula assembled 200,000 men at the Channel on the continent, only to have them gather seashells (musculi) according to Suetonius, perhaps as a symbolic gesture to proclaim Caligula's victory over the sea. Three years later, Claudius directed four legions to invade Britain and restore the exiled king Verica over the Atrebates. The Romans defeated the Catuvellauni, and then organized their conquests as the province of Britain. By 47 AD, the Romans held the lands southeast of the Fosse Way. Control over Wales was delayed by reverses and the effects of Boudica's uprising, but the Romans expanded steadily northward.

 

The conquest of Britain continued under command of Gnaeus Julius Agricola (77–84), who expanded the Roman Empire as far as Caledonia. In mid-84 AD, Agricola faced the armies of the Caledonians, led by Calgacus, at the Battle of Mons Graupius. Battle casualties were estimated by Tacitus to be upwards of 10,000 on the Caledonian side and about 360 on the Roman side. The bloodbath at Mons Graupius concluded the forty-year conquest of Britain, a period that possibly saw between 100,000 and 250,000 Britons killed. In the context of pre-industrial warfare and of a total population of Britain of c. 2 million, these are very high figures.

 

Under the 2nd-century emperors Hadrian and Antoninus Pius, two walls were built to defend the Roman province from the Caledonians, whose realms in the Scottish Highlands were never controlled. Around 197 AD, the Severan Reforms divided Britain into two provinces: Britannia Superior and Britannia Inferior. During the Diocletian Reforms, at the end of the 3rd century, Britannia was divided into four provinces under the direction of a vicarius, who administered the Diocese of the Britains. A fifth province, Valentia, is attested in the later 4th century. For much of the later period of the Roman occupation, Britannia was subject to barbarian invasions and often came under the control of imperial usurpers and imperial pretenders. The final Roman withdrawal from Britain occurred around 410; the native kingdoms are considered to have formed Sub-Roman Britain after that.

 

Following the conquest of the Britons, a distinctive Romano-British culture emerged as the Romans introduced improved agriculture, urban planning, industrial production, and architecture. The Roman goddess Britannia became the female personification of Britain. After the initial invasions, Roman historians generally only mention Britain in passing. Thus, most present knowledge derives from archaeological investigations and occasional epigraphic evidence lauding the Britannic achievements of an emperor. Roman citizens settled in Britain from many parts of the Empire.

 

History

Britain was known to the Classical world. The Greeks, the Phoenicians and the Carthaginians traded for Cornish tin in the 4th century BC. The Greeks referred to the Cassiterides, or "tin islands", and placed them near the west coast of Europe. The Carthaginian sailor Himilco is said to have visited the island in the 6th or 5th century BC and the Greek explorer Pytheas in the 4th. It was regarded as a place of mystery, with some writers refusing to believe it existed.

 

The first direct Roman contact was when Julius Caesar undertook two expeditions in 55 and 54 BC, as part of his conquest of Gaul, believing the Britons were helping the Gallic resistance. The first expedition was more a reconnaissance than a full invasion and gained a foothold on the coast of Kent but was unable to advance further because of storm damage to the ships and a lack of cavalry. Despite the military failure, it was a political success, with the Roman Senate declaring a 20-day public holiday in Rome to honour the unprecedented achievement of obtaining hostages from Britain and defeating Belgic tribes on returning to the continent.

 

The second invasion involved a substantially larger force and Caesar coerced or invited many of the native Celtic tribes to pay tribute and give hostages in return for peace. A friendly local king, Mandubracius, was installed, and his rival, Cassivellaunus, was brought to terms. Hostages were taken, but historians disagree over whether any tribute was paid after Caesar returned to Gaul.

 

Caesar conquered no territory and left no troops behind, but he established clients and brought Britain into Rome's sphere of influence. Augustus planned invasions in 34, 27 and 25 BC, but circumstances were never favourable, and the relationship between Britain and Rome settled into one of diplomacy and trade. Strabo, writing late in Augustus's reign, claimed that taxes on trade brought in more annual revenue than any conquest could. Archaeology shows that there was an increase in imported luxury goods in southeastern Britain. Strabo also mentions British kings who sent embassies to Augustus, and Augustus's own Res Gestae refers to two British kings he received as refugees. When some of Tiberius's ships were carried to Britain in a storm during his campaigns in Germany in 16 AD, they came back with tales of monsters.

 

Rome appears to have encouraged a balance of power in southern Britain, supporting two powerful kingdoms: the Catuvellauni, ruled by the descendants of Tasciovanus, and the Atrebates, ruled by the descendants of Commius. This policy was followed until 39 or 40 AD, when Caligula received an exiled member of the Catuvellaunian dynasty and planned an invasion of Britain that collapsed in farcical circumstances before it left Gaul. When Claudius successfully invaded in 43 AD, it was in aid of another fugitive British ruler, Verica of the Atrebates.

 

Roman invasion

The invasion force in 43 AD was led by Aulus Plautius,[26] but it is unclear how many legions were sent. The Legio II Augusta, commanded by future emperor Vespasian, was the only one directly attested to have taken part. The Legio IX Hispana, the XIV Gemina (later styled Martia Victrix) and the XX (later styled Valeria Victrix) are known to have served during the Boudican Revolt of 60/61, and were probably there since the initial invasion. This is not certain because the Roman army was flexible, with units being moved around whenever necessary. The IX Hispana may have been permanently stationed, with records showing it at Eboracum (York) in 71 and on a building inscription there dated 108, before being destroyed in the east of the Empire, possibly during the Bar Kokhba revolt.

 

The invasion was delayed by a troop mutiny until an imperial freedman persuaded them to overcome their fear of crossing the Ocean and campaigning beyond the limits of the known world. They sailed in three divisions, and probably landed at Richborough in Kent; at least part of the force may have landed near Fishbourne, West Sussex.

 

The Catuvellauni and their allies were defeated in two battles: the first, assuming a Richborough landing, on the river Medway, the second on the river Thames. One of their leaders, Togodumnus, was killed, but his brother Caratacus survived to continue resistance elsewhere. Plautius halted at the Thames and sent for Claudius, who arrived with reinforcements, including artillery and elephants, for the final march to the Catuvellaunian capital, Camulodunum (Colchester). Vespasian subdued the southwest, Cogidubnus was set up as a friendly king of several territories, and treaties were made with tribes outside direct Roman control.

 

Establishment of Roman rule

After capturing the south of the island, the Romans turned their attention to what is now Wales. The Silures, Ordovices and Deceangli remained implacably opposed to the invaders and for the first few decades were the focus of Roman military attention, despite occasional minor revolts among Roman allies like the Brigantes and the Iceni. The Silures were led by Caratacus, and he carried out an effective guerrilla campaign against Governor Publius Ostorius Scapula. Finally, in 51, Ostorius lured Caratacus into a set-piece battle and defeated him. The British leader sought refuge among the Brigantes, but their queen, Cartimandua, proved her loyalty by surrendering him to the Romans. He was brought as a captive to Rome, where a dignified speech he made during Claudius's triumph persuaded the emperor to spare his life. The Silures were still not pacified, and Cartimandua's ex-husband Venutius replaced Caratacus as the most prominent leader of British resistance.

 

On Nero's accession, Roman Britain extended as far north as Lindum. Gaius Suetonius Paulinus, the conqueror of Mauretania (modern day Algeria and Morocco), then became governor of Britain, and in 60 and 61 he moved against Mona (Anglesey) to settle accounts with Druidism once and for all. Paulinus led his army across the Menai Strait and massacred the Druids and burnt their sacred groves.

 

While Paulinus was campaigning in Mona, the southeast of Britain rose in revolt under the leadership of Boudica. She was the widow of the recently deceased king of the Iceni, Prasutagus. The Roman historian Tacitus reports that Prasutagus had left a will leaving half his kingdom to Nero in the hope that the remainder would be left untouched. He was wrong. When his will was enforced, Rome[clarification needed] responded by violently seizing the tribe's lands in full. Boudica protested. In consequence, Rome[clarification needed] punished her and her daughters by flogging and rape. In response, the Iceni, joined by the Trinovantes, destroyed the Roman colony at Camulodunum (Colchester) and routed the part of the IXth Legion that was sent to relieve it. Paulinus rode to London (then called Londinium), the rebels' next target, but concluded it could not be defended. Abandoned, it was destroyed, as was Verulamium (St. Albans). Between seventy and eighty thousand people are said to have been killed in the three cities. But Paulinus regrouped with two of the three legions still available to him, chose a battlefield, and, despite being outnumbered by more than twenty to one, defeated the rebels in the Battle of Watling Street. Boudica died not long afterwards, by self-administered poison or by illness. During this time, the Emperor Nero considered withdrawing Roman forces from Britain altogether.

 

There was further turmoil in 69, the "Year of the Four Emperors". As civil war raged in Rome, weak governors were unable to control the legions in Britain, and Venutius of the Brigantes seized his chance. The Romans had previously defended Cartimandua against him, but this time were unable to do so. Cartimandua was evacuated, and Venutius was left in control of the north of the country. After Vespasian secured the empire, his first two appointments as governor, Quintus Petillius Cerialis and Sextus Julius Frontinus, took on the task of subduing the Brigantes and Silures respectively.[38] Frontinus extended Roman rule to all of South Wales, and initiated exploitation of the mineral resources, such as the gold mines at Dolaucothi.

 

In the following years, the Romans conquered more of the island, increasing the size of Roman Britain. Governor Gnaeus Julius Agricola, father-in-law to the historian Tacitus, conquered the Ordovices in 78. With the XX Valeria Victrix legion, Agricola defeated the Caledonians in 84 at the Battle of Mons Graupius, in north-east Scotland. This was the high-water mark of Roman territory in Britain: shortly after his victory, Agricola was recalled from Britain back to Rome, and the Romans initially retired to a more defensible line along the Forth–Clyde isthmus, freeing soldiers badly needed along other frontiers.

 

For much of the history of Roman Britain, a large number of soldiers were garrisoned on the island. This required that the emperor station a trusted senior man as governor of the province. As a result, many future emperors served as governors or legates in this province, including Vespasian, Pertinax, and Gordian I.

 

Roman military organisation in the north

In 84 AD

In 84 AD

 

In 155 AD

In 155 AD

 

Hadrian's Wall, and Antonine Wall

There is no historical source describing the decades that followed Agricola's recall. Even the name of his replacement is unknown. Archaeology has shown that some Roman forts south of the Forth–Clyde isthmus were rebuilt and enlarged; others appear to have been abandoned. By 87 the frontier had been consolidated on the Stanegate. Roman coins and pottery have been found circulating at native settlement sites in the Scottish Lowlands in the years before 100, indicating growing Romanisation. Some of the most important sources for this era are the writing tablets from the fort at Vindolanda in Northumberland, mostly dating to 90–110. These tablets provide evidence for the operation of a Roman fort at the edge of the Roman Empire, where officers' wives maintained polite society while merchants, hauliers and military personnel kept the fort operational and supplied.

 

Around 105 there appears to have been a serious setback at the hands of the tribes of the Picts: several Roman forts were destroyed by fire, with human remains and damaged armour at Trimontium (at modern Newstead, in SE Scotland) indicating hostilities at least at that site.[citation needed] There is also circumstantial evidence that auxiliary reinforcements were sent from Germany, and an unnamed British war of the period is mentioned on the gravestone of a tribune of Cyrene. Trajan's Dacian Wars may have led to troop reductions in the area or even total withdrawal followed by slighting of the forts by the Picts rather than an unrecorded military defeat. The Romans were also in the habit of destroying their own forts during an orderly withdrawal, in order to deny resources to an enemy. In either case, the frontier probably moved south to the line of the Stanegate at the Solway–Tyne isthmus around this time.

 

A new crisis occurred at the beginning of Hadrian's reign): a rising in the north which was suppressed by Quintus Pompeius Falco. When Hadrian reached Britannia on his famous tour of the Roman provinces around 120, he directed an extensive defensive wall, known to posterity as Hadrian's Wall, to be built close to the line of the Stanegate frontier. Hadrian appointed Aulus Platorius Nepos as governor to undertake this work who brought the Legio VI Victrix legion with him from Germania Inferior. This replaced the famous Legio IX Hispana, whose disappearance has been much discussed. Archaeology indicates considerable political instability in Scotland during the first half of the 2nd century, and the shifting frontier at this time should be seen in this context.

 

In the reign of Antoninus Pius (138–161) the Hadrianic border was briefly extended north to the Forth–Clyde isthmus, where the Antonine Wall was built around 142 following the military reoccupation of the Scottish lowlands by a new governor, Quintus Lollius Urbicus.

 

The first Antonine occupation of Scotland ended as a result of a further crisis in 155–157, when the Brigantes revolted. With limited options to despatch reinforcements, the Romans moved their troops south, and this rising was suppressed by Governor Gnaeus Julius Verus. Within a year the Antonine Wall was recaptured, but by 163 or 164 it was abandoned. The second occupation was probably connected with Antoninus's undertakings to protect the Votadini or his pride in enlarging the empire, since the retreat to the Hadrianic frontier occurred not long after his death when a more objective strategic assessment of the benefits of the Antonine Wall could be made. The Romans did not entirely withdraw from Scotland at this time: the large fort at Newstead was maintained along with seven smaller outposts until at least 180.

 

During the twenty-year period following the reversion of the frontier to Hadrian's Wall in 163/4, Rome was concerned with continental issues, primarily problems in the Danubian provinces. Increasing numbers of hoards of buried coins in Britain at this time indicate that peace was not entirely achieved. Sufficient Roman silver has been found in Scotland to suggest more than ordinary trade, and it is likely that the Romans were reinforcing treaty agreements by paying tribute to their implacable enemies, the Picts.

 

In 175, a large force of Sarmatian cavalry, consisting of 5,500 men, arrived in Britannia, probably to reinforce troops fighting unrecorded uprisings. In 180, Hadrian's Wall was breached by the Picts and the commanding officer or governor was killed there in what Cassius Dio described as the most serious war of the reign of Commodus. Ulpius Marcellus was sent as replacement governor and by 184 he had won a new peace, only to be faced with a mutiny from his own troops. Unhappy with Marcellus's strictness, they tried to elect a legate named Priscus as usurper governor; he refused, but Marcellus was lucky to leave the province alive. The Roman army in Britannia continued its insubordination: they sent a delegation of 1,500 to Rome to demand the execution of Tigidius Perennis, a Praetorian prefect who they felt had earlier wronged them by posting lowly equites to legate ranks in Britannia. Commodus met the party outside Rome and agreed to have Perennis killed, but this only made them feel more secure in their mutiny.

 

The future emperor Pertinax (lived 126–193) was sent to Britannia to quell the mutiny and was initially successful in regaining control, but a riot broke out among the troops. Pertinax was attacked and left for dead, and asked to be recalled to Rome, where he briefly succeeded Commodus as emperor in 192.

 

3rd century

The death of Commodus put into motion a series of events which eventually led to civil war. Following the short reign of Pertinax, several rivals for the emperorship emerged, including Septimius Severus and Clodius Albinus. The latter was the new governor of Britannia, and had seemingly won the natives over after their earlier rebellions; he also controlled three legions, making him a potentially significant claimant. His sometime rival Severus promised him the title of Caesar in return for Albinus's support against Pescennius Niger in the east. Once Niger was neutralised, Severus turned on his ally in Britannia; it is likely that Albinus saw he would be the next target and was already preparing for war.

 

Albinus crossed to Gaul in 195, where the provinces were also sympathetic to him, and set up at Lugdunum. Severus arrived in February 196, and the ensuing battle was decisive. Albinus came close to victory, but Severus's reinforcements won the day, and the British governor committed suicide. Severus soon purged Albinus's sympathisers and perhaps confiscated large tracts of land in Britain as punishment. Albinus had demonstrated the major problem posed by Roman Britain. In order to maintain security, the province required the presence of three legions, but command of these forces provided an ideal power base for ambitious rivals. Deploying those legions elsewhere would strip the island of its garrison, leaving the province defenceless against uprisings by the native Celtic tribes and against invasion by the Picts and Scots.

 

The traditional view is that northern Britain descended into anarchy during Albinus's absence. Cassius Dio records that the new Governor, Virius Lupus, was obliged to buy peace from a fractious northern tribe known as the Maeatae. The succession of militarily distinguished governors who were subsequently appointed suggests that enemies of Rome were posing a difficult challenge, and Lucius Alfenus Senecio's report to Rome in 207 describes barbarians "rebelling, over-running the land, taking loot and creating destruction". In order to rebel, of course, one must be a subject – the Maeatae clearly did not consider themselves such. Senecio requested either reinforcements or an Imperial expedition, and Severus chose the latter, despite being 62 years old. Archaeological evidence shows that Senecio had been rebuilding the defences of Hadrian's Wall and the forts beyond it, and Severus's arrival in Britain prompted the enemy tribes to sue for peace immediately. The emperor had not come all that way to leave without a victory, and it is likely that he wished to provide his teenage sons Caracalla and Geta with first-hand experience of controlling a hostile barbarian land.

 

Northern campaigns, 208–211

An invasion of Caledonia led by Severus and probably numbering around 20,000 troops moved north in 208 or 209, crossing the Wall and passing through eastern Scotland on a route similar to that used by Agricola. Harried by punishing guerrilla raids by the northern tribes and slowed by an unforgiving terrain, Severus was unable to meet the Caledonians on a battlefield. The emperor's forces pushed north as far as the River Tay, but little appears to have been achieved by the invasion, as peace treaties were signed with the Caledonians. By 210 Severus had returned to York, and the frontier had once again become Hadrian's Wall. He assumed the title Britannicus but the title meant little with regard to the unconquered north, which clearly remained outside the authority of the Empire. Almost immediately, another northern tribe, the Maeatae, went to war. Caracalla left with a punitive expedition, but by the following year his ailing father had died and he and his brother left the province to press their claim to the throne.

 

As one of his last acts, Severus tried to solve the problem of powerful and rebellious governors in Britain by dividing the province into Britannia Superior and Britannia Inferior. This kept the potential for rebellion in check for almost a century. Historical sources provide little information on the following decades, a period known as the Long Peace. Even so, the number of buried hoards found from this period rises, suggesting continuing unrest. A string of forts were built along the coast of southern Britain to control piracy; and over the following hundred years they increased in number, becoming the Saxon Shore Forts.

 

During the middle of the 3rd century, the Roman Empire was convulsed by barbarian invasions, rebellions and new imperial pretenders. Britannia apparently avoided these troubles, but increasing inflation had its economic effect. In 259 a so-called Gallic Empire was established when Postumus rebelled against Gallienus. Britannia was part of this until 274 when Aurelian reunited the empire.

 

Around the year 280, a half-British officer named Bonosus was in command of the Roman's Rhenish fleet when the Germans managed to burn it at anchor. To avoid punishment, he proclaimed himself emperor at Colonia Agrippina (Cologne) but was crushed by Marcus Aurelius Probus. Soon afterwards, an unnamed governor of one of the British provinces also attempted an uprising. Probus put it down by sending irregular troops of Vandals and Burgundians across the Channel.

 

The Carausian Revolt led to a short-lived Britannic Empire from 286 to 296. Carausius was a Menapian naval commander of the Britannic fleet; he revolted upon learning of a death sentence ordered by the emperor Maximian on charges of having abetted Frankish and Saxon pirates and having embezzled recovered treasure. He consolidated control over all the provinces of Britain and some of northern Gaul while Maximian dealt with other uprisings. An invasion in 288 failed to unseat him and an uneasy peace ensued, with Carausius issuing coins and inviting official recognition. In 293, the junior emperor Constantius Chlorus launched a second offensive, besieging the rebel port of Gesoriacum (Boulogne-sur-Mer) by land and sea. After it fell, Constantius attacked Carausius's other Gallic holdings and Frankish allies and Carausius was usurped by his treasurer, Allectus. Julius Asclepiodotus landed an invasion fleet near Southampton and defeated Allectus in a land battle.

 

Diocletian's reforms

As part of Diocletian's reforms, the provinces of Roman Britain were organized as a diocese governed by a vicarius under a praetorian prefect who, from 318 to 331, was Junius Bassus who was based at Augusta Treverorum (Trier).

 

The vicarius was based at Londinium as the principal city of the diocese. Londinium and Eboracum continued as provincial capitals and the territory was divided up into smaller provinces for administrative efficiency.

 

Civilian and military authority of a province was no longer exercised by one official and the governor was stripped of military command which was handed over to the Dux Britanniarum by 314. The governor of a province assumed more financial duties (the procurators of the Treasury ministry were slowly phased out in the first three decades of the 4th century). The Dux was commander of the troops of the Northern Region, primarily along Hadrian's Wall and his responsibilities included protection of the frontier. He had significant autonomy due in part to the distance from his superiors.

 

The tasks of the vicarius were to control and coordinate the activities of governors; monitor but not interfere with the daily functioning of the Treasury and Crown Estates, which had their own administrative infrastructure; and act as the regional quartermaster-general of the armed forces. In short, as the sole civilian official with superior authority, he had general oversight of the administration, as well as direct control, while not absolute, over governors who were part of the prefecture; the other two fiscal departments were not.

 

The early-4th-century Verona List, the late-4th-century work of Sextus Rufus, and the early-5th-century List of Offices and work of Polemius Silvius all list four provinces by some variation of the names Britannia I, Britannia II, Maxima Caesariensis, and Flavia Caesariensis; all of these seem to have initially been directed by a governor (praeses) of equestrian rank. The 5th-century sources list a fifth province named Valentia and give its governor and Maxima's a consular rank. Ammianus mentions Valentia as well, describing its creation by Count Theodosius in 369 after the quelling of the Great Conspiracy. Ammianus considered it a re-creation of a formerly lost province, leading some to think there had been an earlier fifth province under another name (may be the enigmatic "Vespasiana"), and leading others to place Valentia beyond Hadrian's Wall, in the territory abandoned south of the Antonine Wall.

 

Reconstructions of the provinces and provincial capitals during this period partially rely on ecclesiastical records. On the assumption that the early bishoprics mimicked the imperial hierarchy, scholars use the list of bishops for the 314 Council of Arles. The list is patently corrupt: the British delegation is given as including a Bishop "Eborius" of Eboracum and two bishops "from Londinium" (one de civitate Londinensi and the other de civitate colonia Londinensium). The error is variously emended: Bishop Ussher proposed Colonia, Selden Col. or Colon. Camalodun., and Spelman Colonia Cameloduni (all various names of Colchester); Gale and Bingham offered colonia Lindi and Henry Colonia Lindum (both Lincoln); and Bishop Stillingfleet and Francis Thackeray read it as a scribal error of Civ. Col. Londin. for an original Civ. Col. Leg. II (Caerleon). On the basis of the Verona List, the priest and deacon who accompanied the bishops in some manuscripts are ascribed to the fourth province.

 

In the 12th century, Gerald of Wales described the supposedly metropolitan sees of the early British church established by the legendary SS Fagan and "Duvian". He placed Britannia Prima in Wales and western England with its capital at "Urbs Legionum" (Caerleon); Britannia Secunda in Kent and southern England with its capital at "Dorobernia" (Canterbury); Flavia in Mercia and central England with its capital at "Lundonia" (London); "Maximia" in northern England with its capital at Eboracum (York); and Valentia in "Albania which is now Scotland" with its capital at St Andrews. Modern scholars generally dispute the last: some place Valentia at or beyond Hadrian's Wall but St Andrews is beyond even the Antonine Wall and Gerald seems to have simply been supporting the antiquity of its church for political reasons.

 

A common modern reconstruction places the consular province of Maxima at Londinium, on the basis of its status as the seat of the diocesan vicarius; places Prima in the west according to Gerald's traditional account but moves its capital to Corinium of the Dobunni (Cirencester) on the basis of an artifact recovered there referring to Lucius Septimius, a provincial rector; places Flavia north of Maxima, with its capital placed at Lindum Colonia (Lincoln) to match one emendation of the bishops list from Arles;[d] and places Secunda in the north with its capital at Eboracum (York). Valentia is placed variously in northern Wales around Deva (Chester); beside Hadrian's Wall around Luguvalium (Carlisle); and between the walls along Dere Street.

 

4th century

Emperor Constantius returned to Britain in 306, despite his poor health, with an army aiming to invade northern Britain, the provincial defences having been rebuilt in the preceding years. Little is known of his campaigns with scant archaeological evidence, but fragmentary historical sources suggest he reached the far north of Britain and won a major battle in early summer before returning south. His son Constantine (later Constantine the Great) spent a year in northern Britain at his father's side, campaigning against the Picts beyond Hadrian's Wall in the summer and autumn. Constantius died in York in July 306 with his son at his side. Constantine then successfully used Britain as the starting point of his march to the imperial throne, unlike the earlier usurper, Albinus.

 

In the middle of the century, the province was loyal for a few years to the usurper Magnentius, who succeeded Constans following the latter's death. After the defeat and death of Magnentius in the Battle of Mons Seleucus in 353, Constantius II dispatched his chief imperial notary Paulus Catena to Britain to hunt down Magnentius's supporters. The investigation deteriorated into a witch-hunt, which forced the vicarius Flavius Martinus to intervene. When Paulus retaliated by accusing Martinus of treason, the vicarius attacked Paulus with a sword, with the aim of assassinating him, but in the end he committed suicide.

 

As the 4th century progressed, there were increasing attacks from the Saxons in the east and the Scoti (Irish) in the west. A series of forts had been built, starting around 280, to defend the coasts, but these preparations were not enough when, in 367, a general assault of Saxons, Picts, Scoti and Attacotti, combined with apparent dissension in the garrison on Hadrian's Wall, left Roman Britain prostrate. The invaders overwhelmed the entire western and northern regions of Britannia and the cities were sacked. This crisis, sometimes called the Barbarian Conspiracy or the Great Conspiracy, was settled by Count Theodosius from 368 with a string of military and civil reforms. Theodosius crossed from Bononia (Boulogne-sur-Mer) and marched on Londinium where he began to deal with the invaders and made his base.[ An amnesty was promised to deserters which enabled Theodosius to regarrison abandoned forts. By the end of the year Hadrian's Wall was retaken and order returned. Considerable reorganization was undertaken in Britain, including the creation of a new province named Valentia, probably to better address the state of the far north. A new Dux Britanniarum was appointed, Dulcitius, with Civilis to head a new civilian administration.

 

Another imperial usurper, Magnus Maximus, raised the standard of revolt at Segontium (Caernarfon) in north Wales in 383, and crossed the English Channel. Maximus held much of the western empire, and fought a successful campaign against the Picts and Scots around 384. His continental exploits required troops from Britain, and it appears that forts at Chester and elsewhere were abandoned in this period, triggering raids and settlement in north Wales by the Irish. His rule was ended in 388, but not all the British troops may have returned: the Empire's military resources were stretched to the limit along the Rhine and Danube. Around 396 there were more barbarian incursions into Britain. Stilicho led a punitive expedition. It seems peace was restored by 399, and it is likely that no further garrisoning was ordered; by 401 more troops were withdrawn, to assist in the war against Alaric I.

 

End of Roman rule

The traditional view of historians, informed by the work of Michael Rostovtzeff, was of a widespread economic decline at the beginning of the 5th century. Consistent archaeological evidence has told another story, and the accepted view is undergoing re-evaluation. Some features are agreed: more opulent but fewer urban houses, an end to new public building and some abandonment of existing ones, with the exception of defensive structures, and the widespread formation of "dark earth" deposits indicating increased horticulture within urban precincts. Turning over the basilica at Silchester to industrial uses in the late 3rd century, doubtless officially condoned, marks an early stage in the de-urbanisation of Roman Britain.

 

The abandonment of some sites is now believed to be later than had been thought. Many buildings changed use but were not destroyed. There was a growing number of barbarian attacks, but these targeted vulnerable rural settlements rather than towns. Some villas such as Chedworth, Great Casterton in Rutland and Hucclecote in Gloucestershire had new mosaic floors laid around this time, suggesting that economic problems may have been limited and patchy. Many suffered some decay before being abandoned in the 5th century; the story of Saint Patrick indicates that villas were still occupied until at least 430. Exceptionally, new buildings were still going up in this period in Verulamium and Cirencester. Some urban centres, for example Canterbury, Cirencester, Wroxeter, Winchester and Gloucester, remained active during the 5th and 6th centuries, surrounded by large farming estates.

 

Urban life had generally grown less intense by the fourth quarter of the 4th century, and coins minted between 378 and 388 are very rare, indicating a likely combination of economic decline, diminishing numbers of troops, problems with the payment of soldiers and officials or with unstable conditions during the usurpation of Magnus Maximus 383–87. Coinage circulation increased during the 390s, but never attained the levels of earlier decades. Copper coins are very rare after 402, though minted silver and gold coins from hoards indicate they were still present in the province even if they were not being spent. By 407 there were very few new Roman coins going into circulation, and by 430 it is likely that coinage as a medium of exchange had been abandoned. Mass-produced wheel thrown pottery ended at approximately the same time; the rich continued to use metal and glass vessels, while the poor made do with humble "grey ware" or resorted to leather or wooden containers.

 

Sub-Roman Britain

Towards the end of the 4th century Roman rule in Britain came under increasing pressure from barbarian attacks. Apparently, there were not enough troops to mount an effective defence. After elevating two disappointing usurpers, the army chose a soldier, Constantine III, to become emperor in 407. He crossed to Gaul but was defeated by Honorius; it is unclear how many troops remained or ever returned, or whether a commander-in-chief in Britain was ever reappointed. A Saxon incursion in 408 was apparently repelled by the Britons, and in 409 Zosimus records that the natives expelled the Roman civilian administration. Zosimus may be referring to the Bacaudic rebellion of the Breton inhabitants of Armorica since he describes how, in the aftermath of the revolt, all of Armorica and the rest of Gaul followed the example of the Brettaniai. A letter from Emperor Honorius in 410 has traditionally been seen as rejecting a British appeal for help, but it may have been addressed to Bruttium or Bologna. With the imperial layers of the military and civil government gone, administration and justice fell to municipal authorities, and local warlords gradually emerged all over Britain, still utilizing Romano-British ideals and conventions. Historian Stuart Laycock has investigated this process and emphasised elements of continuity from the British tribes in the pre-Roman and Roman periods, through to the native post-Roman kingdoms.

 

In British tradition, pagan Saxons were invited by Vortigern to assist in fighting the Picts, Scoti, and Déisi. (Germanic migration into Roman Britannia may have begun much earlier. There is recorded evidence, for example, of Germanic auxiliaries supporting the legions in Britain in the 1st and 2nd centuries.) The new arrivals rebelled, plunging the country into a series of wars that eventually led to the Saxon occupation of Lowland Britain by 600. Around this time, many Britons fled to Brittany (hence its name), Galicia and probably Ireland. A significant date in sub-Roman Britain is the Groans of the Britons, an unanswered appeal to Aetius, leading general of the western Empire, for assistance against Saxon invasion in 446. Another is the Battle of Deorham in 577, after which the significant cities of Bath, Cirencester and Gloucester fell and the Saxons reached the western sea.

 

Historians generally reject the historicity of King Arthur, who is supposed to have resisted the Anglo-Saxon conquest according to later medieval legends.

 

Trade

During the Roman period Britain's continental trade was principally directed across the Southern North Sea and Eastern Channel, focusing on the narrow Strait of Dover, with more limited links via the Atlantic seaways. The most important British ports were London and Richborough, whilst the continental ports most heavily engaged in trade with Britain were Boulogne and the sites of Domburg and Colijnsplaat at the mouth of the river Scheldt. During the Late Roman period it is likely that the shore forts played some role in continental trade alongside their defensive functions.

 

Exports to Britain included: coin; pottery, particularly red-gloss terra sigillata (samian ware) from southern, central and eastern Gaul, as well as various other wares from Gaul and the Rhine provinces; olive oil from southern Spain in amphorae; wine from Gaul in amphorae and barrels; salted fish products from the western Mediterranean and Brittany in barrels and amphorae; preserved olives from southern Spain in amphorae; lava quern-stones from Mayen on the middle Rhine; glass; and some agricultural products. Britain's exports are harder to detect archaeologically, but will have included metals, such as silver and gold and some lead, iron and copper. Other exports probably included agricultural products, oysters and salt, whilst large quantities of coin would have been re-exported back to the continent as well.

 

These products moved as a result of private trade and also through payments and contracts established by the Roman state to support its military forces and officials on the island, as well as through state taxation and extraction of resources. Up until the mid-3rd century, the Roman state's payments appear to have been unbalanced, with far more products sent to Britain, to support its large military force (which had reached c. 53,000 by the mid-2nd century), than were extracted from the island.

 

It has been argued that Roman Britain's continental trade peaked in the late 1st century AD and thereafter declined as a result of an increasing reliance on local products by the population of Britain, caused by economic development on the island and by the Roman state's desire to save money by shifting away from expensive long-distance imports. Evidence has been outlined that suggests that the principal decline in Roman Britain's continental trade may have occurred in the late 2nd century AD, from c. 165 AD onwards. This has been linked to the economic impact of contemporary Empire-wide crises: the Antonine Plague and the Marcomannic Wars.

 

From the mid-3rd century onwards, Britain no longer received such a wide range and extensive quantity of foreign imports as it did during the earlier part of the Roman period; vast quantities of coin from continental mints reached the island, whilst there is historical evidence for the export of large amounts of British grain to the continent during the mid-4th century. During the latter part of the Roman period British agricultural products, paid for by both the Roman state and by private consumers, clearly played an important role in supporting the military garrisons and urban centres of the northwestern continental Empire. This came about as a result of the rapid decline in the size of the British garrison from the mid-3rd century onwards (thus freeing up more goods for export), and because of 'Germanic' incursions across the Rhine, which appear to have reduced rural settlement and agricultural output in northern Gaul.

 

Economy

Mineral extraction sites such as the Dolaucothi gold mine were probably first worked by the Roman army from c. 75, and at some later stage passed to civilian operators. The mine developed as a series of opencast workings, mainly by the use of hydraulic mining methods. They are described by Pliny the Elder in his Natural History in great detail. Essentially, water supplied by aqueducts was used to prospect for ore veins by stripping away soil to reveal the bedrock. If veins were present, they were attacked using fire-setting and the ore removed for comminution. The dust was washed in a small stream of water and the heavy gold dust and gold nuggets collected in riffles. The diagram at right shows how Dolaucothi developed from c. 75 through to the 1st century. When opencast work was no longer feasible, tunnels were driven to follow the veins. The evidence from the site shows advanced technology probably under the control of army engineers.

 

The Wealden ironworking zone, the lead and silver mines of the Mendip Hills and the tin mines of Cornwall seem to have been private enterprises leased from the government for a fee. Mining had long been practised in Britain (see Grimes Graves), but the Romans introduced new technical knowledge and large-scale industrial production to revolutionise the industry. It included hydraulic mining to prospect for ore by removing overburden as well as work alluvial deposits. The water needed for such large-scale operations was supplied by one or more aqueducts, those surviving at Dolaucothi being especially impressive. Many prospecting areas were in dangerous, upland country, and, although mineral exploitation was presumably one of the main reasons for the Roman invasion, it had to wait until these areas were subdued.

 

By the 3rd and 4th centuries, small towns could often be found near villas. In these towns, villa owners and small-scale farmers could obtain specialist tools. Lowland Britain in the 4th century was agriculturally prosperous enough to export grain to the continent. This prosperity lay behind the blossoming of villa building and decoration that occurred between AD 300 and 350.

 

Britain's cities also consumed Roman-style pottery and other goods, and were centres through which goods could be distributed elsewhere. At Wroxeter in Shropshire, stock smashed into a gutter during a 2nd-century fire reveals that Gaulish samian ware was being sold alongside mixing bowls from the Mancetter-Hartshill industry of the West Midlands. Roman designs were most popular, but rural craftsmen still produced items derived from the Iron Age La Tène artistic traditions. Britain was home to much gold, which attracted Roman invaders. By the 3rd century, Britain's economy was diverse and well established, with commerce extending into the non-Romanised north.

 

Government

Further information: Governors of Roman Britain, Roman client kingdoms in Britain, and Roman auxiliaries in Britain

Under the Roman Empire, administration of peaceful provinces was ultimately the remit of the Senate, but those, like Britain, that required permanent garrisons, were placed under the Emperor's control. In practice imperial provinces were run by resident governors who were members of the Senate and had held the consulship. These men were carefully selected, often having strong records of military success and administrative ability. In Britain, a governor's role was primarily military, but numerous other tasks were also his responsibility, such as maintaining diplomatic relations with local client kings, building roads, ensuring the public courier system functioned, supervising the civitates and acting as a judge in important legal cases. When not campaigning, he would travel the province hearing complaints and recruiting new troops.

 

To assist him in legal matters he had an adviser, the legatus juridicus, and those in Britain appear to have been distinguished lawyers perhaps because of the challenge of incorporating tribes into the imperial system and devising a workable method of taxing them. Financial administration was dealt with by a procurator with junior posts for each tax-raising power. Each legion in Britain had a commander who answered to the governor and, in time of war, probably directly ruled troublesome districts. Each of these commands carried a tour of duty of two to three years in different provinces. Below these posts was a network of administrative managers covering intelligence gathering, sending reports to Rome, organising military supplies and dealing with prisoners. A staff of seconded soldiers provided clerical services.

 

Colchester was probably the earliest capital of Roman Britain, but it was soon eclipsed by London with its strong mercantile connections. The different forms of municipal organisation in Britannia were known as civitas (which were subdivided, amongst other forms, into colonies such as York, Colchester, Gloucester and Lincoln and municipalities such as Verulamium), and were each governed by a senate of local landowners, whether Brythonic or Roman, who elected magistrates concerning judicial and civic affairs. The various civitates sent representatives to a yearly provincial council in order to profess loyalty to the Roman state, to send direct petitions to the Emperor in times of extraordinary need, and to worship the imperial cult.

 

Demographics

Roman Britain had an estimated population between 2.8 million and 3 million people at the end of the second century. At the end of the fourth century, it had an estimated population of 3.6 million people, of whom 125,000 consisted of the Roman army and their families and dependents.[80] The urban population of Roman Britain was about 240,000 people at the end of the fourth century. The capital city of Londinium is estimated to have had a population of about 60,000 people. Londinium was an ethnically diverse city with inhabitants from the Roman Empire, including natives of Britannia, continental Europe, the Middle East, and North Africa. There was also cultural diversity in other Roman-British towns, which were sustained by considerable migration, from Britannia and other Roman territories, including continental Europe, Roman Syria, the Eastern Mediterranean and North Africa. In a study conducted in 2012, around 45 percent of sites investigated dating from the Roman period had at least one individual of North African origin.

 

Town and country

During their occupation of Britain the Romans founded a number of important settlements, many of which survive. The towns suffered attrition in the later 4th century, when public building ceased and some were abandoned to private uses. Place names survived the deurbanised Sub-Roman and early Anglo-Saxon periods, and historiography has been at pains to signal the expected survivals, but archaeology shows that a bare handful of Roman towns were continuously occupied. According to S.T. Loseby, the very idea of a town as a centre of power and administration was reintroduced to England by the Roman Christianising mission to Canterbury, and its urban revival was delayed to the 10th century.

 

Roman towns can be broadly grouped in two categories. Civitates, "public towns" were formally laid out on a grid plan, and their role in imperial administration occasioned the construction of public buildings. The much more numerous category of vici, "small towns" grew on informal plans, often round a camp or at a ford or crossroads; some were not small, others were scarcely urban, some not even defended by a wall, the characteristic feature of a place of any importance.

 

Cities and towns which have Roman origins, or were extensively developed by them are listed with their Latin names in brackets; civitates are marked C

 

Alcester (Alauna)

Alchester

Aldborough, North Yorkshire (Isurium Brigantum) C

Bath (Aquae Sulis) C

Brough (Petuaria) C

Buxton (Aquae Arnemetiae)

Caerleon (Isca Augusta) C

Caernarfon (Segontium) C

Caerwent (Venta Silurum) C

Caister-on-Sea C

Canterbury (Durovernum Cantiacorum) C

Carlisle (Luguvalium) C

Carmarthen (Moridunum) C

Chelmsford (Caesaromagus)

Chester (Deva Victrix) C

Chester-le-Street (Concangis)

Chichester (Noviomagus Reginorum) C

Cirencester (Corinium) C

Colchester (Camulodunum) C

Corbridge (Coria) C

Dorchester (Durnovaria) C

Dover (Portus Dubris)

Exeter (Isca Dumnoniorum) C

Gloucester (Glevum) C

Great Chesterford (the name of this vicus is unknown)

Ilchester (Lindinis) C

Leicester (Ratae Corieltauvorum) C

Lincoln (Lindum Colonia) C

London (Londinium) C

Manchester (Mamucium) C

Newcastle upon Tyne (Pons Aelius)

Northwich (Condate)

St Albans (Verulamium) C

Silchester (Calleva Atrebatum) C

Towcester (Lactodurum)

Whitchurch (Mediolanum) C

Winchester (Venta Belgarum) C

Wroxeter (Viroconium Cornoviorum) C

York (Eboracum) C

 

Religion

The druids, the Celtic priestly caste who were believed to originate in Britain, were outlawed by Claudius, and in 61 they vainly defended their sacred groves from destruction by the Romans on the island of Mona (Anglesey). Under Roman rule the Britons continued to worship native Celtic deities, such as Ancasta, but often conflated with their Roman equivalents, like Mars Rigonemetos at Nettleham.

 

The degree to which earlier native beliefs survived is difficult to gauge precisely. Certain European ritual traits such as the significance of the number 3, the importance of the head and of water sources such as springs remain in the archaeological record, but the differences in the votive offerings made at the baths at Bath, Somerset, before and after the Roman conquest suggest that continuity was only partial. Worship of the Roman emperor is widely recorded, especially at military sites. The founding of a Roman temple to Claudius at Camulodunum was one of the impositions that led to the revolt of Boudica. By the 3rd century, Pagans Hill Roman Temple in Somerset was able to exist peaceably and it did so into the 5th century.

 

Pagan religious practices were supported by priests, represented in Britain by votive deposits of priestly regalia such as chain crowns from West Stow and Willingham Fen.

 

Eastern cults such as Mithraism also grew in popularity towards the end of the occupation. The London Mithraeum is one example of the popularity of mystery religions among the soldiery. Temples to Mithras also exist in military contexts at Vindobala on Hadrian's Wall (the Rudchester Mithraeum) and at Segontium in Roman Wales (the Caernarfon Mithraeum).

 

Christianity

It is not clear when or how Christianity came to Britain. A 2nd-century "word square" has been discovered in Mamucium, the Roman settlement of Manchester. It consists of an anagram of PATER NOSTER carved on a piece of amphora. There has been discussion by academics whether the "word square" is a Christian artefact, but if it is, it is one of the earliest examples of early Christianity in Britain. The earliest confirmed written evidence for Christianity in Britain is a statement by Tertullian, c. 200 AD, in which he described "all the limits of the Spains, and the diverse nations of the Gauls, and the haunts of the Britons, inaccessible to the Romans, but subjugated to Christ". Archaeological evidence for Christian communities begins to appear in the 3rd and 4th centuries. Small timber churches are suggested at Lincoln and Silchester and baptismal fonts have been found at Icklingham and the Saxon Shore Fort at Richborough. The Icklingham font is made of lead, and visible in the British Museum. A Roman Christian graveyard exists at the same site in Icklingham. A possible Roman 4th-century church and associated burial ground was also discovered at Butt Road on the south-west outskirts of Colchester during the construction of the new police station there, overlying an earlier pagan cemetery. The Water Newton Treasure is a hoard of Christian silver church plate from the early 4th century and the Roman villas at Lullingstone and Hinton St Mary contained Christian wall paintings and mosaics respectively. A large 4th-century cemetery at Poundbury with its east–west oriented burials and lack of grave goods has been interpreted as an early Christian burial ground, although such burial rites were also becoming increasingly common in pagan contexts during the period.

 

The Church in Britain seems to have developed the cust

Bikini Swimsuit Model Goddess! Blonde California Surf Girl Laguna Beach! Pretty Blue Eyes & Pink Bikini Model Goddess! Tall, Thin, & Fit! 45SURF dx4/dt=ic 45EPIC

 

My Epic Book: Photographing Women Models!

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Portrait, Swimsuit, Lingerie, Boudoir, Fine Art, & Fashion Photography Exalting the Venus Goddess Archetype: How to Shoot Epic ...

 

All the photography, swimsuits, gold 45 revolver and 45surf logos, clothing designs, and lingerie are composed and designed in accordance with the golden ratio and divine proportion!

 

Dr. E’s Golden Ratio Principle: The golden ratio exalts beauty because the number is a characteristic of the mathematically and physically most efficient manners of growth and distribution, on both evolutionary and purely physical levels. The golden ratio ensures that the proportions and structure of that which came before provide the proportions and structure of that which comes after, thusly providing symmetry over not only space but time, and exalting life’s foundational dynamic symmetry. Robust, ordered, symmetric growth is naturally associated with health and beauty, and thus we evolved to perceive the golden ratio harmonies as inherently beautiful, as we saw and felt their presence in all vital growth and life. In the salient features and proportions of humans and nature alike, from the distribution of our facial features and bones to the arrangements of petals, leaves, and sunflowers seeds. As ratios between Fibonacci Numbers offer the closest whole-number approximations to the golden ratio, and as seeds, cells, leaves, bones, and other physical entities appear in whole numbers, the Fibonacci Numbers oft appear in the arrangement of nature’s discrete elements as “growth’s numbers.” From the dawn of time, humanity sought to salute their gods in art and temples exalting the same proportion by which they and all their vital sustenance, as well as all the flowers and nature’s epic beauty, had been created—the golden ratio.

 

Exalt your photography with Golden Ratio Compositions!

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Golden Ratio Compositions & Secret Sacred Geometry for Photography, Fine Art, & Landscape Photographers: How to Exalt Art with Leonardo da Vinci's, Michelangelo's!

 

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Light Time Dimension Theory's dx4/dt=ic graces all the clothes, swimsuits, and lingerie!

 

Proof of Light Time Dimension Theory's principle of a fourth expanding dimension:

 

Proof of ltd’s principle:

1. The velocity of every object through

Spacetime is c.

2. The velocity of light through the

Three spatial dimensions is always c.

3. If light had any velocity through x4,

Light’s total velocity would not be c.

4. Ergo light remains stationary in x4.

5. Thus light tracks and traces the

Movement and character of x4.

6. As light is a spherically-symmetric,

Probabilistic wavefront expanding

At c, x4 expands at the rate of c in a

Spherically-symmetric manner,

Distributing nonlocality.

QED

 

Beautiful Angel Goddess The Birth of Venus! White Summer Dress! 45Epic 45SURF Swimsuit Bikini Model! Beautiful Golden Ratio Composition Photography Surf Goddesses! Athletic Action Portraits of Swimsuit Bikini Models! High Res Venus! Sexy Hot dx4/dt=ic !

Mercedes Benz OC500RF-2546 Irizar i6s Efficient de Socibús.

Please don't use this image on websites, blogs or other media without my explicit permission. © All rights reserved

 

Using Energy Efficiently

 

For all the energy required to propel a vehicle, not all of it makes it to the wheels. Some of it is lost to friction and heat. Vehicle inefficiency can be classified into two categories of losses: road-load and energy conversion. At Tesla, careful attention is given to both to achieve the maximum range. The Tesla Roadster leverages both an incredible electric powertrain and an engineer’s obsession with efficiency to be the most efficient production sports car on the market today.

 

London Drive the Future

And I feel guilty that I am not a fan!

 

ODC: energy efficient

Energy efficient ('off the grid') Southern Vermont home features:

 

Electricity generation

2 turbine windmills

2 kinds of solar panels (rigid and amorphous/strips)

 

Heating/Water

Russian stove (closed chamber wood stove, thermal mass heating system)

solar water heating panels

gas powered radiant heating in the floor.

 

Low Energy Lighting & Appliances

Because of careful selection of lighting and appliances, the house is able to run within its energy budget almost all of the time.

 

After 2 years of running completely off-grid (with backup gasoline generator), we installed electricity (a "grid tie"), mostly used to feed excess capacity back into the grid.

 

Hints and Links on home energy consumption:

There are 2 ways to decrease home energy use.

1. Reduce power consumption.

2. Install a renewable energy system

 

The first can be as simple as replacing high usage incandescent bulbs with new compact flourescent bulbs and lighting fixtures. Around here, you can buy these products at a discount thru programs sponsored by the electric company (NStar).

 

Another good idea is replacing old appliances with newer energy efficient models.

 

There is a lot of information about energy saving here :

www1.eere.energy.gov/consumer/tips/

 

If you are interested in solar energy or other sustainable energy generation technologies, I suggest taking a look at www.homepower.com/ a magazine dedicated to "home-scale renewable energy and sustainable living".

 

This site has an overview article on Renewable Energy which is relatively short and clear. www.homepower.com/files/featured/HP116_pp46-50_Casale.pdf

 

Contact: For more information about energy efficient living you can write Paul at myerspe@starband.net

 

File: DSC_5825_ACR

Scania Irizar i6s Efficient de P. Puerto reforzando a Alsa en la línea Málaga-Valencia (VAC-150: Bacoma).

New 45EPIC Fine Art facebook and instagram landscapes!

 

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Sony A7RII Spring Wildflowers Fine Art Joshua Tree National Park! Dr. Elliot McGucken Fine Art Landscape Photography! Sony A7R 2 & Sony 16-35mm Vario-Tessar T FE F4 ZA OSS E-Mount Lens!

 

An important thing to remember is that even though pixel sizes keep getting smaller and smaller, the technology is advancing, so the smaller pixels are more efficient at collecting light. For instance, the Sony A7rII is back-illuminated which allows more photons to hit the sensor. Semiconductor technology is always advancing, so the brilliant engineers are always improving the signal/noise ratio. Far higher pixel counts, as well as better dynamic ranger, are thus not only possible, but the future!

 

Yes I have a Ph.D. in physics! I worked on phototranistors and photodiodes as well as an artificial retina for the blind. :)

 

You can read more about my own physics theory (dx4/dt=ic) here: herosodysseyphysics.wordpress.com/

 

And follow me on instagram! @45surf

instagram.com/45surf

 

Facebook!

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Dr. Elliot McGucken Fine Art Photography!

 

I love shooting fine art landscapes and fine art nature photography! :) I live for it!

 

45surf fine art!

 

Feel free to ask me any questions! Always love sharing tech talk and insights! :)

 

And all the best on Your Epic Hero's Odyssey!

 

The new Lightroom rocks!

 

Beautiful magnificent clouds!

 

View your artistic mission into photography as an epic odyssey of heroic poetry! Take it from Homer in Homer's Odyssey: "Tell me, O muse, of that ingenious hero who travelled far and wide after he had sacked the famous town of Troy. Many cities did he visit, and many were the nations with whose manners and customs he was acquainted; moreover he suffered much by sea while trying to save his own life and bring his men safely home; but do what he might he could not save his men, for they perished through their own sheer folly in eating the cattle of the Sun-god Hyperion; so the god prevented them from ever reaching home. Tell me, too, about all these things, O daughter of Jove, from whatsoever source you may know them. " --Samuel Butler Translation of Homer's Odyssey

 

All the best on your Epic Hero's Odyssey from Johnny Ranger McCoy!

Candid street shot, Teignmouth, Devon. UK.

  

Bikers at the "Devon Air Ambulance" charity ride out. Teignmouth, Devon,UK.

  

They came from all walks of life:

  

Builders, bakers, bank managers.

  

Farmers, farriers, and "frogmen".

  

Hairdressers, handy men and "Hell's Angels".

  

They all gave their time, money and support for a worthy cause.

  

DAAT is a Devon based charity that aims to relieve sickness and injury in and around the county of Devon, by assisting in the provision of an Air Ambulance service. By getting patients to the care they need in an efficient manner, chances of survival can be greatly improved. This is all achieved independent of government funding, through the fantastic donations of the public in Devon.

They like returning to the same perch. Perhaps it's just because it's efficient. Lots of activity at Shepherds Bush now. So unlike a handful of weeks ago when it felt like all the birds were on holiday!

Infographic poster for the San Diego Regional Energy Office.

Fish, any of approximately 34,000 species of vertebrate animals (phylum Chordata) found in the fresh and salt waters of the world. Living species range from the primitive jawless lampreys and hagfishes through the cartilaginous sharks, skates, and rays to the abundant and diverse bony fishes. Most fish species are cold-blooded; however, one species, the opah (Lampris guttatus), is warm-blooded.

 

The term fish is applied to a variety of vertebrates of several evolutionary lines. It describes a life-form rather than a taxonomic group. As members of the phylum Chordata, fish share certain features with other vertebrates. These features are gill slits at some point in the life cycle, a notochord, or skeletal supporting rod, a dorsal hollow nerve cord, and a tail. Living fishes represent some five classes, which are as distinct from one another as are the four classes of familiar air-breathing animals—amphibians, reptiles, birds, and mammals. For example, the jawless fishes (Agnatha) have gills in pouches and lack limb girdles. Extant agnathans are the lampreys and the hagfishes. As the name implies, the skeletons of fishes of the class Chondrichthyes (from chondr, “cartilage,” and ichthyes, “fish”) are made entirely of cartilage. Modern fish of this class lack a swim bladder, and their scales and teeth are made up of the same placoid material. Sharks, skates, and rays are examples of cartilaginous fishes. The bony fishes are by far the largest class. Examples range from the tiny seahorse to the 450-kg (1,000-pound) blue marlin, from the flattened soles and flounders to the boxy puffers and ocean sunfishes. Unlike the scales of the cartilaginous fishes, those of bony fishes, when present, grow throughout life and are made up of thin overlapping plates of bone. Bony fishes also have an operculum that covers the gill slits.

 

The study of fishes, the science of ichthyology, is of broad importance. Fishes are of interest to humans for many reasons, the most important being their relationship with and dependence on the environment. A more obvious reason for interest in fishes is their role as a moderate but important part of the world’s food supply. This resource, once thought unlimited, is now realized to be finite and in delicate balance with the biological, chemical, and physical factors of the aquatic environment. Overfishing, pollution, and alteration of the environment are the chief enemies of proper fisheries management, both in fresh waters and in the ocean. (For a detailed discussion of the technology and economics of fisheries, see commercial fishing.) Another practical reason for studying fishes is their use in disease control. As predators on mosquito larvae, they help curb malaria and other mosquito-borne diseases.

 

Fishes are valuable laboratory animals in many aspects of medical and biological research. For example, the readiness of many fishes to acclimate to captivity has allowed biologists to study behaviour, physiology, and even ecology under relatively natural conditions. Fishes have been especially important in the study of animal behaviour, where research on fishes has provided a broad base for the understanding of the more flexible behaviour of the higher vertebrates. The zebra fish is used as a model in studies of gene expression.

 

There are aesthetic and recreational reasons for an interest in fishes. Millions of people keep live fishes in home aquariums for the simple pleasure of observing the beauty and behaviour of animals otherwise unfamiliar to them. Aquarium fishes provide a personal challenge to many aquarists, allowing them to test their ability to keep a small section of the natural environment in their homes. Sportfishing is another way of enjoying the natural environment, also indulged in by millions of people every year. Interest in aquarium fishes and sportfishing supports multimillion-dollar industries throughout the world.

 

Fishes have been in existence for more than 450 million years, during which time they have evolved repeatedly to fit into almost every conceivable type of aquatic habitat. In a sense, land vertebrates are simply highly modified fishes: when fishes colonized the land habitat, they became tetrapod (four-legged) land vertebrates. The popular conception of a fish as a slippery, streamlined aquatic animal that possesses fins and breathes by gills applies to many fishes, but far more fishes deviate from that conception than conform to it. For example, the body is elongate in many forms and greatly shortened in others; the body is flattened in some (principally in bottom-dwelling fishes) and laterally compressed in many others; the fins may be elaborately extended, forming intricate shapes, or they may be reduced or even lost; and the positions of the mouth, eyes, nostrils, and gill openings vary widely. Air breathers have appeared in several evolutionary lines.

 

Many fishes are cryptically coloured and shaped, closely matching their respective environments; others are among the most brilliantly coloured of all organisms, with a wide range of hues, often of striking intensity, on a single individual. The brilliance of pigments may be enhanced by the surface structure of the fish, so that it almost seems to glow. A number of unrelated fishes have actual light-producing organs. Many fishes are able to alter their coloration—some for the purpose of camouflage, others for the enhancement of behavioral signals.

 

Fishes range in adult length from less than 10 mm (0.4 inch) to more than 20 metres (60 feet) and in weight from about 1.5 grams (less than 0.06 ounce) to many thousands of kilograms. Some live in shallow thermal springs at temperatures slightly above 42 °C (100 °F), others in cold Arctic seas a few degrees below 0 °C (32 °F) or in cold deep waters more than 4,000 metres (13,100 feet) beneath the ocean surface. The structural and, especially, the physiological adaptations for life at such extremes are relatively poorly known and provide the scientifically curious with great incentive for study.

 

Almost all natural bodies of water bear fish life, the exceptions being very hot thermal ponds and extremely salt-alkaline lakes, such as the Dead Sea in Asia and the Great Salt Lake in North America. The present distribution of fishes is a result of the geological history and development of Earth as well as the ability of fishes to undergo evolutionary change and to adapt to the available habitats. Fishes may be seen to be distributed according to habitat and according to geographical area. Major habitat differences are marine and freshwater. For the most part, the fishes in a marine habitat differ from those in a freshwater habitat, even in adjacent areas, but some, such as the salmon, migrate from one to the other. The freshwater habitats may be seen to be of many kinds. Fishes found in mountain torrents, Arctic lakes, tropical lakes, temperate streams, and tropical rivers will all differ from each other, both in obvious gross structure and in physiological attributes. Even in closely adjacent habitats where, for example, a tropical mountain torrent enters a lowland stream, the fish fauna will differ. The marine habitats can be divided into deep ocean floors (benthic), mid-water oceanic (bathypelagic), surface oceanic (pelagic), rocky coast, sandy coast, muddy shores, bays, estuaries, and others. Also, for example, rocky coastal shores in tropical and temperate regions will have different fish faunas, even when such habitats occur along the same coastline.

 

Although much is known about the present geographical distribution of fishes, far less is known about how that distribution came about. Many parts of the fish fauna of the fresh waters of North America and Eurasia are related and undoubtedly have a common origin. The faunas of Africa and South America are related, extremely old, and probably an expression of the drifting apart of the two continents. The fauna of southern Asia is related to that of Central Asia, and some of it appears to have entered Africa. The extremely large shore-fish faunas of the Indian and tropical Pacific oceans comprise a related complex, but the tropical shore fauna of the Atlantic, although containing Indo-Pacific components, is relatively limited and probably younger. The Arctic and Antarctic marine faunas are quite different from each other. The shore fauna of the North Pacific is quite distinct, and that of the North Atlantic more limited and probably younger. Pelagic oceanic fishes, especially those in deep waters, are similar the world over, showing little geographical isolation in terms of family groups. The deep oceanic habitat is very much the same throughout the world, but species differences do exist, showing geographical areas determined by oceanic currents and water masses.

 

All aspects of the life of a fish are closely correlated with adaptation to the total environment, physical, chemical, and biological. In studies, all the interdependent aspects of fish, such as behaviour, locomotion, reproduction, and physical and physiological characteristics, must be taken into account.

 

Correlated with their adaptation to an extremely wide variety of habitats is the extremely wide variety of life cycles that fishes display. The great majority hatch from relatively small eggs a few days to several weeks or more after the eggs are scattered in the water. Newly hatched young are still partially undeveloped and are called larvae until body structures such as fins, skeleton, and some organs are fully formed. Larval life is often very short, usually less than a few weeks, but it can be very long, some lampreys continuing as larvae for at least five years. Young and larval fishes, before reaching sexual maturity, must grow considerably, and their small size and other factors often dictate that they live in a habitat different than that of the adults. For example, most tropical marine shore fishes have pelagic larvae. Larval food also is different, and larval fishes often live in shallow waters, where they may be less exposed to predators.

 

After a fish reaches adult size, the length of its life is subject to many factors, such as innate rates of aging, predation pressure, and the nature of the local climate. The longevity of a species in the protected environment of an aquarium may have nothing to do with how long members of that species live in the wild. Many small fishes live only one to three years at the most. In some species, however, individuals may live as long as 10 or 20 or even 100 years.

 

Fish behaviour is a complicated and varied subject. As in almost all animals with a central nervous system, the nature of a response of an individual fish to stimuli from its environment depends upon the inherited characteristics of its nervous system, on what it has learned from past experience, and on the nature of the stimuli. Compared with the variety of human responses, however, that of a fish is stereotyped, not subject to much modification by “thought” or learning, and investigators must guard against anthropomorphic interpretations of fish behaviour.

 

Fishes perceive the world around them by the usual senses of sight, smell, hearing, touch, and taste and by special lateral line water-current detectors. In the few fishes that generate electric fields, a process that might best be called electrolocation aids in perception. One or another of these senses often is emphasized at the expense of others, depending upon the fish’s other adaptations. In fishes with large eyes, the sense of smell may be reduced; others, with small eyes, hunt and feed primarily by smell (such as some eels).

 

Specialized behaviour is primarily concerned with the three most important activities in the fish’s life: feeding, reproduction, and escape from enemies. Schooling behaviour of sardines on the high seas, for instance, is largely a protective device to avoid enemies, but it is also associated with and modified by their breeding and feeding requirements. Predatory fishes are often solitary, lying in wait to dart suddenly after their prey, a kind of locomotion impossible for beaked parrot fishes, which feed on coral, swimming in small groups from one coral head to the next. In addition, some predatory fishes that inhabit pelagic environments, such as tunas, often school.

 

Sleep in fishes, all of which lack true eyelids, consists of a seemingly listless state in which the fish maintains its balance but moves slowly. If attacked or disturbed, most can dart away. A few kinds of fishes lie on the bottom to sleep. Most catfishes, some loaches, and some eels and electric fishes are strictly nocturnal, being active and hunting for food during the night and retiring during the day to holes, thick vegetation, or other protective parts of the environment.

 

Communication between members of a species or between members of two or more species often is extremely important, especially in breeding behaviour (see below Reproduction). The mode of communication may be visual, as between the small so-called cleaner fish and a large fish of a very different species. The larger fish often allows the cleaner to enter its mouth to remove gill parasites. The cleaner is recognized by its distinctive colour and actions and therefore is not eaten, even if the larger fish is normally a predator. Communication is often chemical, signals being sent by specific chemicals called pheromones.

 

Many fishes have a streamlined body and swim freely in open water. Fish locomotion is closely correlated with habitat and ecological niche (the general position of the animal to its environment).

 

Many fishes in both marine and fresh waters swim at the surface and have mouths adapted to feed best (and sometimes only) at the surface. Often such fishes are long and slender, able to dart at surface insects or at other surface fishes and in turn to dart away from predators; needlefishes, halfbeaks, and topminnows (such as killifish and mosquito fish) are good examples. Oceanic flying fishes escape their predators by gathering speed above the water surface, with the lower lobe of the tail providing thrust in the water. They then glide hundreds of yards on enlarged, winglike pectoral and pelvic fins. South American freshwater flying fishes escape their enemies by jumping and propelling their strongly keeled bodies out of the water.

 

So-called mid-water swimmers, the most common type of fish, are of many kinds and live in many habitats. The powerful fusiform tunas and the trouts, for example, are adapted for strong, fast swimming, the tunas to capture prey speedily in the open ocean and the trouts to cope with the swift currents of streams and rivers. The trout body form is well adapted to many habitats. Fishes that live in relatively quiet waters such as bays or lake shores or slow rivers usually are not strong, fast swimmers but are capable of short, quick bursts of speed to escape a predator. Many of these fishes have their sides flattened, examples being the sunfish and the freshwater angelfish of aquarists. Fish associated with the bottom or substrate usually are slow swimmers. Open-water plankton-feeding fishes almost always remain fusiform and are capable of rapid, strong movement (for example, sardines and herrings of the open ocean and also many small minnows of streams and lakes).

 

Bottom-living fishes are of many kinds and have undergone many types of modification of their body shape and swimming habits. Rays, which evolved from strong-swimming mid-water sharks, usually stay close to the bottom and move by undulating their large pectoral fins. Flounders live in a similar habitat and move over the bottom by undulating the entire body. Many bottom fishes dart from place to place, resting on the bottom between movements, a motion common in gobies. One goby relative, the mudskipper, has taken to living at the edge of pools along the shore of muddy mangrove swamps. It escapes its enemies by flipping rapidly over the mud, out of the water. Some catfishes, synbranchid eels, the so-called climbing perch, and a few other fishes venture out over damp ground to find more promising waters than those that they left. They move by wriggling their bodies, sometimes using strong pectoral fins; most have accessory air-breathing organs. Many bottom-dwelling fishes live in mud holes or rocky crevices. Marine eels and gobies commonly are found in such habitats and for the most part venture far beyond their cavelike homes. Some bottom dwellers, such as the clingfishes (Gobiesocidae), have developed powerful adhesive disks that enable them to remain in place on the substrate in areas such as rocky coasts, where the action of the waves is great.

 

The methods of reproduction in fishes are varied, but most fishes lay a large number of small eggs, fertilized and scattered outside of the body. The eggs of pelagic fishes usually remain suspended in the open water. Many shore and freshwater fishes lay eggs on the bottom or among plants. Some have adhesive eggs. The mortality of the young and especially of the eggs is very high, and often only a few individuals grow to maturity out of hundreds, thousands, and in some cases millions of eggs laid.

 

Males produce sperm, usually as a milky white substance called milt, in two (sometimes one) testes within the body cavity. In bony fishes a sperm duct leads from each testis to a urogenital opening behind the vent or anus. In sharks and rays and in cyclostomes the duct leads to a cloaca. Sometimes the pelvic fins are modified to help transmit the milt to the eggs at the female’s vent or on the substrate where the female has placed them. Sometimes accessory organs are used to fertilize females internally—for example, the claspers of many sharks and rays.

 

In the females the eggs are formed in two ovaries (sometimes only one) and pass through the ovaries to the urogenital opening and to the outside. In some fishes the eggs are fertilized internally but are shed before development takes place. Members of about a dozen families each of bony fishes (teleosts) and sharks bear live young. Many skates and rays also bear live young. In some bony fishes the eggs simply develop within the female, the young emerging when the eggs hatch (ovoviviparous). Others develop within the ovary and are nourished by ovarian tissues after hatching (viviparous). There are also other methods utilized by fishes to nourish young within the female. In all live-bearers the young are born at a relatively large size and are few in number. In one family of primarily marine fishes, the surfperches from the Pacific coast of North America, Japan, and Korea, the males of at least one species are born sexually mature, although they are not fully grown.

 

Some fishes are hermaphroditic—an individual producing both sperm and eggs, usually at different stages of its life. Self-fertilization, however, is probably rare.

 

Successful reproduction and, in many cases, defense of the eggs and the young are assured by rather stereotypical but often elaborate courtship and parental behaviour, either by the male or the female or both. Some fishes prepare nests by hollowing out depressions in the sand bottom (cichlids, for example), build nests with plant materials and sticky threads excreted by the kidneys (sticklebacks), or blow a cluster of mucus-covered bubbles at the water surface (gouramis). The eggs are laid in these structures. Some varieties of cichlids and catfishes incubate eggs in their mouths.

 

Some fishes, such as salmon, undergo long migrations from the ocean and up large rivers to spawn in the gravel beds where they themselves hatched (anadromous fishes). Some, such as the freshwater eels (family Anguillidae), live and grow to maturity in fresh water and migrate to the sea to spawn (catadromous fishes). Other fishes undertake shorter migrations from lakes into streams, within the ocean, or enter spawning habitats that they do not ordinarily occupy in other ways.

 

The basic structure and function of the fish body are similar to those of all other vertebrates. The usual four types of tissues are present: surface or epithelial, connective (bone, cartilage, and fibrous tissues, as well as their derivative, blood), nerve, and muscle tissues. In addition, the fish’s organs and organ systems parallel those of other vertebrates.

 

The typical fish body is streamlined and spindle-shaped, with an anterior head, a gill apparatus, and a heart, the latter lying in the midline just below the gill chamber. The body cavity, containing the vital organs, is situated behind the head in the lower anterior part of the body. The anus usually marks the posterior termination of the body cavity and most often occurs just in front of the base of the anal fin. The spinal cord and vertebral column continue from the posterior part of the head to the base of the tail fin, passing dorsal to the body cavity and through the caudal (tail) region behind the body cavity. Most of the body is of muscular tissue, a high proportion of which is necessitated by swimming. In the course of evolution this basic body plan has been modified repeatedly into the many varieties of fish shapes that exist today.

 

The skeleton forms an integral part of the fish’s locomotion system, as well as serving to protect vital parts. The internal skeleton consists of the skull bones (except for the roofing bones of the head, which are really part of the external skeleton), the vertebral column, and the fin supports (fin rays). The fin supports are derived from the external skeleton but will be treated here because of their close functional relationship to the internal skeleton. The internal skeleton of cyclostomes, sharks, and rays is of cartilage; that of many fossil groups and some primitive living fishes is mostly of cartilage but may include some bone. In place of the vertebral column, the earliest vertebrates had a fully developed notochord, a flexible stiff rod of viscous cells surrounded by a strong fibrous sheath. During the evolution of modern fishes the rod was replaced in part by cartilage and then by ossified cartilage. Sharks and rays retain a cartilaginous vertebral column; bony fishes have spool-shaped vertebrae that in the more primitive living forms only partially replace the notochord. The skull, including the gill arches and jaws of bony fishes, is fully, or at least partially, ossified. That of sharks and rays remains cartilaginous, at times partially replaced by calcium deposits but never by true bone.

 

The supportive elements of the fins (basal or radial bones or both) have changed greatly during fish evolution. Some of these changes are described in the section below (Evolution and paleontology). Most fishes possess a single dorsal fin on the midline of the back. Many have two and a few have three dorsal fins. The other fins are the single tail and anal fins and paired pelvic and pectoral fins. A small fin, the adipose fin, with hairlike fin rays, occurs in many of the relatively primitive teleosts (such as trout) on the back near the base of the caudal fin.

 

The skin of a fish must serve many functions. It aids in maintaining the osmotic balance, provides physical protection for the body, is the site of coloration, contains sensory receptors, and, in some fishes, functions in respiration. Mucous glands, which aid in maintaining the water balance and offer protection from bacteria, are extremely numerous in fish skin, especially in cyclostomes and teleosts. Since mucous glands are present in the modern lampreys, it is reasonable to assume that they were present in primitive fishes, such as the ancient Silurian and Devonian agnathans. Protection from abrasion and predation is another function of the fish skin, and dermal (skin) bone arose early in fish evolution in response to this need. It is thought that bone first evolved in skin and only later invaded the cartilaginous areas of the fish’s body, to provide additional support and protection. There is some argument as to which came first, cartilage or bone, and fossil evidence does not settle the question. In any event, dermal bone has played an important part in fish evolution and has different characteristics in different groups of fishes. Several groups are characterized at least in part by the kind of bony scales they possess.

 

Scales have played an important part in the evolution of fishes. Primitive fishes usually had thick bony plates or thick scales in several layers of bone, enamel, and related substances. Modern teleost fishes have scales of bone, which, while still protective, allow much more freedom of motion in the body. A few modern teleosts (some catfishes, sticklebacks, and others) have secondarily acquired bony plates in the skin. Modern and early sharks possessed placoid scales, a relatively primitive type of scale with a toothlike structure, consisting of an outside layer of enamel-like substance (vitrodentine), an inner layer of dentine, and a pulp cavity containing nerves and blood vessels. Primitive bony fishes had thick scales of either the ganoid or the cosmoid type. Cosmoid scales have a hard, enamel-like outer layer, an inner layer of cosmine (a form of dentine), and then a layer of vascular bone (isopedine). In ganoid scales the hard outer layer is different chemically and is called ganoin. Under this is a cosminelike layer and then a vascular bony layer. The thin, translucent bony scales of modern fishes, called cycloid and ctenoid (the latter distinguished by serrations at the edges), lack enameloid and dentine layers.

 

Skin has several other functions in fishes. It is well supplied with nerve endings and presumably receives tactile, thermal, and pain stimuli. Skin is also well supplied with blood vessels. Some fishes breathe in part through the skin, by the exchange of oxygen and carbon dioxide between the surrounding water and numerous small blood vessels near the skin surface.

 

Skin serves as protection through the control of coloration. Fishes exhibit an almost limitless range of colours. The colours often blend closely with the surroundings, effectively hiding the animal. Many fishes use bright colours for territorial advertisement or as recognition marks for other members of their own species, or sometimes for members of other species. Many fishes can change their colour to a greater or lesser degree, by movement of pigment within the pigment cells (chromatophores). Black pigment cells (melanophores), of almost universal occurrence in fishes, are often juxtaposed with other pigment cells. When placed beneath iridocytes or leucophores (bearing the silvery or white pigment guanine), melanophores produce structural colours of blue and green. These colours are often extremely intense, because they are formed by refraction of light through the needlelike crystals of guanine. The blue and green refracted colours are often relatively pure, lacking the red and yellow rays, which have been absorbed by the black pigment (melanin) of the melanophores. Yellow, orange, and red colours are produced by erythrophores, cells containing the appropriate carotenoid pigments. Other colours are produced by combinations of melanophores, erythrophores, and iridocytes.

 

The major portion of the body of most fishes consists of muscles. Most of the mass is trunk musculature, the fin muscles usually being relatively small. The caudal fin is usually the most powerful fin, being moved by the trunk musculature. The body musculature is usually arranged in rows of chevron-shaped segments on each side. Contractions of these segments, each attached to adjacent vertebrae and vertebral processes, bends the body on the vertebral joint, producing successive undulations of the body, passing from the head to the tail, and producing driving strokes of the tail. It is the latter that provides the strong forward movement for most fishes.

 

The digestive system, in a functional sense, starts at the mouth, with the teeth used to capture prey or collect plant foods. Mouth shape and tooth structure vary greatly in fishes, depending on the kind of food normally eaten. Most fishes are predacious, feeding on small invertebrates or other fishes and have simple conical teeth on the jaws, on at least some of the bones of the roof of the mouth, and on special gill arch structures just in front of the esophagus. The latter are throat teeth. Most predacious fishes swallow their prey whole, and the teeth are used for grasping and holding prey, for orienting prey to be swallowed (head first) and for working the prey toward the esophagus. There are a variety of tooth types in fishes. Some fishes, such as sharks and piranhas, have cutting teeth for biting chunks out of their victims. A shark’s tooth, although superficially like that of a piranha, appears in many respects to be a modified scale, while that of the piranha is like that of other bony fishes, consisting of dentine and enamel. Parrot fishes have beaklike mouths with short incisor-like teeth for breaking off coral and have heavy pavementlike throat teeth for crushing the coral. Some catfishes have small brushlike teeth, arranged in rows on the jaws, for scraping plant and animal growth from rocks. Many fishes (such as the Cyprinidae or minnows) have no jaw teeth at all but have very strong throat teeth.

 

Some fishes gather planktonic food by straining it from their gill cavities with numerous elongate stiff rods (gill rakers) anchored by one end to the gill bars. The food collected on these rods is passed to the throat, where it is swallowed. Most fishes have only short gill rakers that help keep food particles from escaping out the mouth cavity into the gill chamber.

 

Once reaching the throat, food enters a short, often greatly distensible esophagus, a simple tube with a muscular wall leading into a stomach. The stomach varies greatly in fishes, depending upon the diet. In most predacious fishes it is a simple straight or curved tube or pouch with a muscular wall and a glandular lining. Food is largely digested there and leaves the stomach in liquid form.

 

Between the stomach and the intestine, ducts enter the digestive tube from the liver and pancreas. The liver is a large, clearly defined organ. The pancreas may be embedded in it, diffused through it, or broken into small parts spread along some of the intestine. The junction between the stomach and the intestine is marked by a muscular valve. Pyloric ceca (blind sacs) occur in some fishes at this junction and have a digestive or absorptive function or both.

 

The intestine itself is quite variable in length, depending upon the fish’s diet. It is short in predacious forms, sometimes no longer than the body cavity, but long in herbivorous forms, being coiled and several times longer than the entire length of the fish in some species of South American catfishes. The intestine is primarily an organ for absorbing nutrients into the bloodstream. The larger its internal surface, the greater its absorptive efficiency, and a spiral valve is one method of increasing its absorption surface.

 

Sharks, rays, chimaeras, lungfishes, surviving chondrosteans, holosteans, and even a few of the more primitive teleosts have a spiral valve or at least traces of it in the intestine. Most modern teleosts have increased the area of the intestinal walls by having numerous folds and villi (fingerlike projections) somewhat like those in humans. Undigested substances are passed to the exterior through the anus in most teleost fishes. In lungfishes, sharks, and rays, it is first passed through the cloaca, a common cavity receiving the intestinal opening and the ducts from the urogenital system.

 

Oxygen and carbon dioxide dissolve in water, and most fishes exchange dissolved oxygen and carbon dioxide in water by means of the gills. The gills lie behind and to the side of the mouth cavity and consist of fleshy filaments supported by the gill arches and filled with blood vessels, which give gills a bright red colour. Water taken in continuously through the mouth passes backward between the gill bars and over the gill filaments, where the exchange of gases takes place. The gills are protected by a gill cover in teleosts and many other fishes but by flaps of skin in sharks, rays, and some of the older fossil fish groups. The blood capillaries in the gill filaments are close to the gill surface to take up oxygen from the water and to give up excess carbon dioxide to the water.

 

Most modern fishes have a hydrostatic (ballast) organ, called the swim bladder, that lies in the body cavity just below the kidney and above the stomach and intestine. It originated as a diverticulum of the digestive canal. In advanced teleosts, especially the acanthopterygians, the bladder has lost its connection with the digestive tract, a condition called physoclistic. The connection has been retained (physostomous) by many relatively primitive teleosts. In several unrelated lines of fishes, the bladder has become specialized as a lung or, at least, as a highly vascularized accessory breathing organ. Some fishes with such accessory organs are obligate air breathers and will drown if denied access to the surface, even in well-oxygenated water. Fishes with a hydrostatic form of swim bladder can control their depth by regulating the amount of gas in the bladder. The gas, mostly oxygen, is secreted into the bladder by special glands, rendering the fish more buoyant; the gas is absorbed into the bloodstream by another special organ, reducing the overall buoyancy and allowing the fish to sink. Some deep-sea fishes may have oils, rather than gas, in the bladder. Other deep-sea and some bottom-living forms have much-reduced swim bladders or have lost the organ entirely.

 

The swim bladder of fishes follows the same developmental pattern as the lungs of land vertebrates. There is no doubt that the two structures have the same historical origin in primitive fishes. More or less intermediate forms still survive among the more primitive types of fishes, such as the lungfishes Lepidosiren and Protopterus.

 

The circulatory, or blood vascular, system consists of the heart, the arteries, the capillaries, and the veins. It is in the capillaries that the interchange of oxygen, carbon dioxide, nutrients, and other substances such as hormones and waste products takes place. The capillaries lead to the veins, which return the venous blood with its waste products to the heart, kidneys, and gills. There are two kinds of capillary beds: those in the gills and those in the rest of the body. The heart, a folded continuous muscular tube with three or four saclike enlargements, undergoes rhythmic contractions and receives venous blood in a sinus venosus. It passes the blood to an auricle and then into a thick muscular pump, the ventricle. From the ventricle the blood goes to a bulbous structure at the base of a ventral aorta just below the gills. The blood passes to the afferent (receiving) arteries of the gill arches and then to the gill capillaries. There waste gases are given off to the environment, and oxygen is absorbed. The oxygenated blood enters efferent (exuant) arteries of the gill arches and then flows into the dorsal aorta. From there blood is distributed to the tissues and organs of the body. One-way valves prevent backflow. The circulation of fishes thus differs from that of the reptiles, birds, and mammals in that oxygenated blood is not returned to the heart prior to distribution to the other parts of the body.

 

The primary excretory organ in fishes, as in other vertebrates, is the kidney. In fishes some excretion also takes place in the digestive tract, skin, and especially the gills (where ammonia is given off). Compared with land vertebrates, fishes have a special problem in maintaining their internal environment at a constant concentration of water and dissolved substances, such as salts. Proper balance of the internal environment (homeostasis) of a fish is in a great part maintained by the excretory system, especially the kidney.

 

The kidney, gills, and skin play an important role in maintaining a fish’s internal environment and checking the effects of osmosis. Marine fishes live in an environment in which the water around them has a greater concentration of salts than they can have inside their body and still maintain life. Freshwater fishes, on the other hand, live in water with a much lower concentration of salts than they require inside their bodies. Osmosis tends to promote the loss of water from the body of a marine fish and absorption of water by that of a freshwater fish. Mucus in the skin tends to slow the process but is not a sufficient barrier to prevent the movement of fluids through the permeable skin. When solutions on two sides of a permeable membrane have different concentrations of dissolved substances, water will pass through the membrane into the more concentrated solution, while the dissolved chemicals move into the area of lower concentration (diffusion).

 

The kidney of freshwater fishes is often larger in relation to body weight than that of marine fishes. In both groups the kidney excretes wastes from the body, but the kidney of freshwater fishes also excretes large amounts of water, counteracting the water absorbed through the skin. Freshwater fishes tend to lose salt to the environment and must replace it. They get some salt from their food, but the gills and skin inside the mouth actively absorb salt from water passed through the mouth. This absorption is performed by special cells capable of moving salts against the diffusion gradient. Freshwater fishes drink very little water and take in little water with their food.

 

Marine fishes must conserve water, and therefore their kidneys excrete little water. To maintain their water balance, marine fishes drink large quantities of seawater, retaining most of the water and excreting the salt. Most nitrogenous waste in marine fishes appears to be secreted by the gills as ammonia. Marine fishes can excrete salt by clusters of special cells (chloride cells) in the gills.

 

There are several teleosts—for example, the salmon—that travel between fresh water and seawater and must adjust to the reversal of osmotic gradients. They adjust their physiological processes by spending time (often surprisingly little time) in the intermediate brackish environment.

 

Marine hagfishes, sharks, and rays have osmotic concentrations in their blood about equal to that of seawater and so do not have to drink water nor perform much physiological work to maintain their osmotic balance. In sharks and rays the osmotic concentration is kept high by retention of urea in the blood. Freshwater sharks have a lowered concentration of urea in the blood.

 

Endocrine glands secrete their products into the bloodstream and body tissues and, along with the central nervous system, control and regulate many kinds of body functions. Cyclostomes have a well-developed endocrine system, and presumably it was well developed in the early Agnatha, ancestral to modern fishes. Although the endocrine system in fishes is similar to that of higher vertebrates, there are numerous differences in detail. The pituitary, the thyroid, the suprarenals, the adrenals, the pancreatic islets, the sex glands (ovaries and testes), the inner wall of the intestine, and the bodies of the ultimobranchial gland make up the endocrine system in fishes. There are some others whose function is not well understood. These organs regulate sexual activity and reproduction, growth, osmotic pressure, general metabolic activities such as the storage of fat and the utilization of foodstuffs, blood pressure, and certain aspects of skin colour. Many of these activities are also controlled in part by the central nervous system, which works with the endocrine system in maintaining the life of a fish. Some parts of the endocrine system are developmentally, and undoubtedly evolutionarily, derived from the nervous system.

 

As in all vertebrates, the nervous system of fishes is the primary mechanism coordinating body activities, as well as integrating these activities in the appropriate manner with stimuli from the environment. The central nervous system, consisting of the brain and spinal cord, is the primary integrating mechanism. The peripheral nervous system, consisting of nerves that connect the brain and spinal cord to various body organs, carries sensory information from special receptor organs such as the eyes, internal ears, nares (sense of smell), taste glands, and others to the integrating centres of the brain and spinal cord. The peripheral nervous system also carries information via different nerve cells from the integrating centres of the brain and spinal cord. This coded information is carried to the various organs and body systems, such as the skeletal muscular system, for appropriate action in response to the original external or internal stimulus. Another branch of the nervous system, the autonomic nervous system, helps to coordinate the activities of many glands and organs and is itself closely connected to the integrating centres of the brain.

 

The brain of the fish is divided into several anatomical and functional parts, all closely interconnected but each serving as the primary centre of integrating particular kinds of responses and activities. Several of these centres or parts are primarily associated with one type of sensory perception, such as sight, hearing, or smell (olfaction).

 

The sense of smell is important in almost all fishes. Certain eels with tiny eyes depend mostly on smell for location of food. The olfactory, or nasal, organ of fishes is located on the dorsal surface of the snout. The lining of the nasal organ has special sensory cells that perceive chemicals dissolved in the water, such as substances from food material, and send sensory information to the brain by way of the first cranial nerve. Odour also serves as an alarm system. Many fishes, especially various species of freshwater minnows, react with alarm to a chemical released from the skin of an injured member of their own species.

 

Many fishes have a well-developed sense of taste, and tiny pitlike taste buds or organs are located not only within their mouth cavities but also over their heads and parts of their body. Catfishes, which often have poor vision, have barbels (“whiskers”) that serve as supplementary taste organs, those around the mouth being actively used to search out food on the bottom. Some species of naturally blind cave fishes are especially well supplied with taste buds, which often cover most of their body surface.

 

Sight is extremely important in most fishes. The eye of a fish is basically like that of all other vertebrates, but the eyes of fishes are extremely varied in structure and adaptation. In general, fishes living in dark and dim water habitats have large eyes, unless they have specialized in some compensatory way so that another sense (such as smell) is dominant, in which case the eyes will often be reduced. Fishes living in brightly lighted shallow waters often will have relatively small but efficient eyes. Cyclostomes have somewhat less elaborate eyes than other fishes, with skin stretched over the eyeball perhaps making their vision somewhat less effective. Most fishes have a spherical lens and accommodate their vision to far or near subjects by moving the lens within the eyeball. A few sharks accommodate by changing the shape of the lens, as in land vertebrates. Those fishes that are heavily dependent upon the eyes have especially strong muscles for accommodation. Most fishes see well, despite the restrictions imposed by frequent turbidity of the water and by light refraction.

 

Fossil evidence suggests that colour vision evolved in fishes more than 300 million years ago, but not all living fishes have retained this ability. Experimental evidence indicates that many shallow-water fishes, if not all, have colour vision and see some colours especially well, but some bottom-dwelling shore fishes live in areas where the water is sufficiently deep to filter out most if not all colours, and these fishes apparently never see colours. When tested in shallow water, they apparently are unable to respond to colour differences.

 

Sound perception and balance are intimately associated senses in a fish. The organs of hearing are entirely internal, located within the skull, on each side of the brain and somewhat behind the eyes. Sound waves, especially those of low frequencies, travel readily through water and impinge directly upon the bones and fluids of the head and body, to be transmitted to the hearing organs. Fishes readily respond to sound; for example, a trout conditioned to escape by the approach of fishermen will take flight upon perceiving footsteps on a stream bank even if it cannot see a fisherman. Compared with humans, however, the range of sound frequencies heard by fishes is greatly restricted. Many fishes communicate with each other by producing sounds in their swim bladders, in their throats by rasping their teeth, and in other ways.

 

A fish or other vertebrate seldom has to rely on a single type of sensory information to determine the nature of the environment around it. A catfish uses taste and touch when examining a food object with its oral barbels. Like most other animals, fishes have many touch receptors over their body surface. Pain and temperature receptors also are present in fishes and presumably produce the same kind of information to a fish as to humans. Fishes react in a negative fashion to stimuli that would be painful to human beings, suggesting that they feel a sensation of pain.

 

An important sensory system in fishes that is absent in other vertebrates (except some amphibians) is the lateral line system. This consists of a series of heavily innervated small canals located in the skin and bone around the eyes, along the lower jaw, over the head, and down the mid-side of the body, where it is associated with the scales. Intermittently along these canals are located tiny sensory organs (pit organs) that apparently detect changes in pressure. The system allows a fish to sense changes in water currents and pressure, thereby helping the fish to orient itself to the various changes that occur in the physical environment.

  

+++ DISCLAIMER +++

Nothing you see here is real, even though the conversion or the presented background story might be based historical facts. BEWARE!

  

Some background:

The "Entwicklung" tank series (= "development"), more commonly known as the E-Series, was a late-World War II attempt by Germany to produce a standardized series of tank designs. There were to be six standard designs in different weight classes, from which several specialized variants were to be developed. This intended to reverse the trend of extremely complex tank designs that had resulted in poor production rates and mechanical unreliability.

 

The E-series designs were simpler, cheaper to produce and more efficient than their predecessors; however, their design offered only modest improvements in armor and firepower over the designs they were intended to replace, such as the Jagdpanzer 38(t), Panther Ausf. G or Tiger II. However, the resulting high degree of standardization of German armored vehicles would also have made logistics and maintenance easier. Indeed, nearly all E-series vehicles — up through and including the E-75 — were intended to use what were essentially the Tiger II's 80 cm (31½ in) diameter, steel-rimmed road wheels for their suspension, meant to overlap each other (as on the later production Tiger I-E and Panther designs that also used them), even though in a highly simplified fashion. For instance, while the E-50/75’s running gear resembled outwardly the Tiger II’s, the latter’s torsion bar suspension, which necessitated a complex hull with many openings, was replaced by very compact conical spring coil packages that each held a pair of interleaved road wheels – with the benefit that all suspension elements remained outside of the hull. This considerably simplified production and saved time as well as scarce material.

 

Focus of initial chassis and combat vehicle development was the E-50/75 Standardpanzer, designed by Adler. These were two mostly identical vehicles and only differed in armor thickness, overall weight and running gear design to cope with the different weights. While the E-50 was the standardized replacement for the medium PzKpfw. V “Panther” and the last operational PzKpfw. VI “Tiger”, with an operational weight of around 50 tons, the E-75 was intended to become the standard heavy tank in the 70 ton class, as a replacement for the Tiger II battle tank and the Jagdtiger SPG. They were to share many components, including the same Maybach HL 234 engine with up to 900 hp output and the drivetrain, as well as running gear elements and almost all peripheral equipment. Both E-50 and E-75 were built on the same production lines for ease of manufacture.

 

This universal tank chassis would, beyond the primary use for battle tanks, also become the basis for a wide range of specialized support vehicles like self-propelled artillery, assault guns, tank hunters and anti-aircraft weapon carriers, which would gradually replace and standardize the great variety of former support vehicles, dramatically optimizing maintenance and logistics.

The E-50/75 SPAAG sub-family itself was quite diversified and comprised a wide range of vehicles that mainly carried different turrets with the respective weaponry as well as air space surveillance, targeting and command equipment. The range of armament included not only guns of various calibers for short, medium and long range in armored and mostly fully enclosed turrets, there were furthermore armored launch ramps for anti-aircraft missiles, including the guided “Rheintochter”, “Wasserfall” or “Enzian” SAMs as well as batteries with unguided “Taifun” anti-aircraft missiles.

 

Among this new vehicle family, the heaviest gun that was carried in a fully enclosed turret was the Rheinmetall 8.8 cm Flak 41. This was an improved version of the powerful pre-war 8.8 cm Flak 36/37 that was also developed into an anti-tank gun and became the main armament for Germany’s heavy battle tanks like the Tiger I: the 8.8 cm PaK 43 and KwK 43, respectively.

The 8.8 cm Flak 41 was a mobile field weapon on a new pedestal mounting that lowered its silhouette, and it used a longer barrel and a longer 88 mm cartridge with an increased propellant load. The shells had a weight of 9.4-kilogram (20 lb) and achieved a muzzle velocity of 1,000 m/s (3,280 ft/s), giving the gun an effective ceiling of 11,300 meters (37,100 ft) and a maximum of 14,700 meters (48,200 ft). The barrel initially consisted of three sections and had a length of 74 calibers but was then redesigned to a simpler dual-section barrel with a length of 72 calibers, for easier manufacture. Improvements in reloading raised the manual firing rate, with 20 to 25 rounds a minute being quoted. The Flak 41 could also be used against ground targets and was able to penetrate about 200 mm (7.9 inches) of armor at 1,000 m (3,280 feet), allowing it to defeat the armor of any contemporary tank from a relatively safe distance. Because of the high cost and complexity of this weapon, however, Rheinmetall manufactured relatively few of them, 556 in all. 399 were fielded, the rest went into SPAAG production.

 

The new pedestal mounting made it easy to adapt the weapon to a vehicle, so that this formidable weapon was immediately earmarked to be combined with a tank chassis to improve its mobility. Since an SPAAG would not need the massive frontal armor of a battle tank, the hull from the lighter E-50 was used (which still had a maximum armor thickness of 60mm at the front at 30°, which was effectively 120 mm vs. the E-75’s 185 mm), but instead of the E-50 MBT’s running gear with six steel wheels per side, the Flak 41 SPAAG used the heavier E-75’s running gear with eight wheels per side and wider tracks, effectively creating a hybrid E-50/75 chassis. This measure was taken to better distribute the vehicle’s overall weight and stabilize the it while moving and firing. In this form the new vehicle received the designation Sd.Kfz. 192/3, also known as “Einheits-Flakpanzer E-50 (88 mm)” or “E-50-41” for short.

 

The Flak 41 was integrated into Rheinmetall’s standardized SPAAG turret that could carry a wide range of automatic anti-aircraft weapons. It was a spacious, boxy design, optimized for maximum internal space than for effective armor protection, resulting in almost vertical side walls and a high silhouette. However, the level of armor was sufficient to protect the crew and the equipment inside from 20 mm gun shells – the typical armament of Allied fighter bombers of the time like the Hawker Typhoon and Tempest.

 

A heavy-duty hydraulic gun mount with a reinforced recoil system allowed an elevation of the Flak 41 between +83° and -3°. As a novel feature the weapon received a semi-automatic loading mechanism. This was the attempt to increase the gun’s excellent manual rate of fire even further, and it mimicked the magazine clips of the smaller 37 mm Flak 37 that contained seven rounds for short, continuous bursts of fire. A belt feed for truly continuous fire had been envisioned, but not possible with the long and heavy 88 mm rounds within the turret and chassis limits. A mechanical magazine solution, e. g. a drum with several rounds, was impossible, too. The most practical solution was a spiral-shaped magazine, driven by simple gravitation and directly attached to the Flak 41’s breech. This feeding could – beyond an initial round already in the barrel – hold up to three more rounds, and upon firing and expelling the empty case, a fresh round automatically fell into place. The rounds from the magazine could be fired in a fully automatic mode in a short burst with a rate of 50-55 RPM. The magazine itself had to be filled manually, though, and the gun could alternatively be fed directly, too, so that different types of ammunition could be prepared and the gunner could switch between them on short notice.

 

To accommodate the weapon’s longer ammunition (the Flak 41’s cartridge was 855 mm long) and a crew of four (commander, gunner and two loaders), the standard Rheinmetall Flak turret had to be extended at the rear. Anti-aircraft aiming was done visually, a stereoscopic rangefinder with a span of 200 cm (78¾ in) was integrated above the gun mount. A secondary ZF.20 scope for ground targets was available, too. Two more crewmen, the driver and a radio operator, sat in the hull in front of the turret, similar to the E-50/75 battle tank’s layout. The radio operator on the right side also acted as a third loader for the ammunition supply stored in the hull’s front.

 

Initially, no secondary defensive armament was provided since the new SPAAGs were to be operated in specialized anti-aircraft units, the so-called Fla-Züge, in which the SPAAGs’ protection would be taken over by supporting infantry and other dedicated vehicles. However, initial field experience quickly revealed this weak spot in the vehicle’s close-range defense: due to material and personnel shortages the Fla-Züge units could hardly be equipped with everything they needed to operate as planned, so that they were in most cases just an underserved mix of SPAAGs, occasionally augmented by a command vehicle and rarely with the protection these specialized vehicles needed. Most of the time the units’ vehicles had to operate independently and were therefore left to their own devices. As a solution, a commander cupola was soon added to the Sd. Kfz.192/3’s turret that not only improved the field of view around the vehicle to assess the tactical situation and detect approaching infantrymen that tried to attach mines or throw Molotov cocktails, it also featured a remote-controlled MG 42 that could be aimed and fired by the commander from the inside. However, to re-supply the ammunition, the cupola hatch had to be opened and someone had to leave the turret’s cover and manually insert a new box of rounds. Furthermore, a 100 mm grenade launcher, a so-called “Nahverteidigungswaffe”, was mounted into the opposite side of the turret roof, too. It fired SMi 35 leaping mines for close defense against approaching infantry. This made the cramped turret interior even more cluttered, but significantly improved the vehicle’s survivability, especially in a confined, urban combat environment. Updated vehicles reached the frontline units in late 1945 and were immediately thrown into service.

 

Despite being a powerful weapon, several operational problems with the Sd.Kfz. 192/3 became soon apparent. The complex Flak 41 and its feeding mechanism needed constant proper maintenance and service – otherwise it easily jammed. Spent shell casing also frequently jammed the gun. The high silhouette was an innate tactical problem, but this had already been accepted during the design phase of Rheinmetall’s SPAAG standard turret. However, the tall turret was the source of an additional conceptual weakness of the Sd.Kfz. 192/3: the sheer weight of the large turret with the heavy gun frequently caused imbalances that overstressed the turret bearing and its electric drive (which had been taken over from the E-50/75 battle tanks), resulting in a jammed turret — especially when either fully loaded or when the ammunition supply was depleted. Due to the large and heavy turret, the vehicle’s center of gravity was relatively high, too, so that its off-road handling was limited. Even on paved roads the early Sd.Kfz. 192/3s tended to porpoise in tight corners and upon braking. Stiffer coil springs, introduced during the running production and retrofitted through field kits to existing vehicles, countered this flaw, even though these kits were rare due to material shortages. Sometimes the harder coil springs were distributed between two vehicles, only replacing the suspension on the front and rear pair of wheels.

A different tactical problem was the limited ammunition supply for the Flak 41. While 57 rounds were sufficient for a comparable battle tank, the semi-automatic Flak 41‘s theoretical high rate of fire meant that the Sd.Kfz. 192/3 quickly depleted this supply and could only keep up fire and its position for a very limited period, or it had to save ammunition to a point that its deployment became pointless. After spending its ammunition, the vehicle had to retreat to a safe second line position to re-supply, and this was, due to the vehicle’s limited mobility, size and the heavy and bulky rounds, a risky undertaking and meant tedious manual labor with poor protection for the supply crews. The resulting supply logistics to keep the Sd.Kfz. 192/3 operational and effective were demanding.

 

Nevertheless, despite these shortcoming, the Sd.Kfz. 192/3 greatly improved the heavy Flak units’ mobility and firepower, and the weapon’s effectiveness was high against both air and ground targets. Until mid-1946, a total of around forty Sd.Kfz. 192/3 were built and put into service, primarily with units that defended vital production sites in Western Germany and Saxonia.

 

At the time of the Sd.Kfz. 192/3’s introduction, anti-aircraft aiming was already augmented by mobile radar systems like the “Würzburg” device or special command vehicles like the Sd.Kfz. 282 “Basilisk” which combined an autonomous radar system with a powerful visual rangefinder and an integrated analogue range calculator, the Kommandogerät 40. However, fire control development had continued, and at least one Sd.Kfz. 192/3 was used in late 1946 during trials to fully automatize gun aiming and firing remotely through electric drives through “slaving” a turret to an external director. This was a modified Sd.Kfz. 282/1 that successfully controlled the Sd.Kfz. 192/3 via cable from an elevated location 50 m away from the SPAAG’s firing position. The objective of these trials was to connect several anti-aircraft weapons to a single command unit with improved sensors and high accuracy under any weather condition for concentrated and more effective fire and an improved first shot hit probability.

  

Specifications:

Crew: Sixe (commander, gunner, two loaders, radio operator, driver)

Weight: 64 tonnes (71 short tons)

Length: 7.27 m (23 ft 10 ¾ in) (hull only)

9.57 m (31 ft 4 ½ in) with gun forward

Width: 3.88 m (12 ft 9 in)

Height 3.46 m (11 ft 4 in)

3.81 m (12 ft 6 in) with commander cupola

Ground clearance: 495 to 510 mm (1 ft 7.5 in to 1 ft 8.1 in)

Suspension: Conical spring

Fuel capacity: 720 liters (160 imp gal; 190 US gal)

 

Armor:

30 – 60 mm (1.2 – 2.4 in)

 

Performance:

Speed

- Maximum, road: 44 km/h (27.3 mph)

- Sustained, road: 38 km/h (24 mph)

- Cross country: 15 to 20 km/h (9.3 to 12.4 mph)

Operational range: 160 km (99 miles)

Power/weight: 14 PS/tonne (12.5 hp/ton)

 

Engine:

V-12 Maybach HL 234 gasoline engine with 900 PS (885 hp/650 kW)

 

Transmission:

ZF AK 7-200 with 7 forward 1 reverse gears

Armament:

1× 8,8 cm Flak 41 L/72 anti-aircraft cannon with 57 rounds in turret and hull

1× 7.92 mm Maschinengewehr 42 with 2.400 rounds, remote-controlled on the commander cupola

  

The kit and its assembly:

This fictional German SPAAG never existed, not even on the drawing boards. But I wondered, after ModelCollect had released an E-100 SPAAG with a twin 88mm gun some years ago, why there was no lighter vehicle with the powerful 88 mm Flak in a closed turret? There were plans to mount this weapon onto a tracked chassis in real life, but it would have been only lightly armored. Then I recently came across a whiffy aftermarket resin turret with a single 88 mm Flak, based on the Tiger II’s Porsche turret, and I liked the idea – even though the rather MBT-esque aftermarket turret looked rather dubious and too small for my taste – esp. the potential angle of the AA weapon appeared insufficient. From this basis the idea was born to create a personal interpretation of a Flak 41 in a fully enclosed turret on a tank chassis.

 

The basis became the Trumpeter 1:72 E-75 kit of the twin 55 mm Flak with its boxy turret. While I initially considered a totally different turret shape, I eventually settled on a generic design that would have been used for a variety of weapons. This appeared more realistic to me and so I stuck to the Rheinmetall AA turret. However, due to the heavy weapon its certainly massive mount and bulky recoil system as well as the long rounds and a crew of four, I decided to enlarge the Rheinmetall turret. The turret was cut into a front and rear half and an 8 mm wide plug, made from 1.5 mm styrene sheet, was implanted and PSRed. To keep the turret rotatable, the rear extension had to be raised, so that the “oriel” could move over the air intake fairings on the engine cover.

Due to the longer roof, some details were modified there. The most obvious addition is a commander cupola on the left, taken from an early Panzer IV, together with a MG 42 and a small shield on a swing arm, inspired by the remote-controlled installation on some Jagdpanzer 38(t) Hetzer. A stereoscopic rangefinder was added to the turret flanks and a periscope added to one of the loader’s hatches. A cover for a ventilator was added on the right side of the roof, together with a cover for a vertical grenade launcher underneath.

 

Using the original turret as base, the model’s movable mount for the twin 55 mm guns was retained and the rear extension would also become a good visual balance for the new main weapon. The armor at barrels’ base was cut off and a 1:72 Flak 41, taken from a Zvezda field gun kit, was glued to it, together with parts of the field gun’s recoil system and styrene bits to blend the new gun into the rest of the turret.

 

The E-75 chassis was taken OOB, since it would be a standardized vehicle basis. Outwardly the hull did not bear recognizable differences to the lighter E-50, which it is supposed to represent, just with more wheels to better cope with the bulky and heavy new turret.

 

Thankfully, this Trumpeter kit’s vinyl tracks were molded in black – sometimes they come in a sandy beige, and it’s a PITA to paint them! As another bonus, Trumpeter’s running gear on the 1:72 E-50/75 model is of a more sturdy and simpler construction than the one on the alternative ModelCollect kit(s), making the assembly and esp. the mounting of the tracks much easier. The Trumpeter kit is simpler than the comparable ModelCollect models with the E-50/75 basis, but the result is visually quite similar.

  

Painting and markings:

The paint scheme uses once more typical German late WWII "Hinterhalt" camouflage colors, namely Dark Yellow, Olive Green and Red Brown. This time, however, to adapt the livery to the boxy hull and the huge turret, the pattern ended up as a kind of a splinter scheme – inspired by a real Panzer V Panther from the Eastern Front in 1943.

The basic colors became Humbrol 57 (Buff) for the RAL 7028 Dunkelgelb, in this case as a rather pale (stretched?) shade, plus large areas of brown (RAL 8017, I used this time Humbrol 98 for a darker and less reddish shade) and Humbrol 86 for the green (RAL 6003), which appears quite pale in contrast to the dark brown. The camouflage was applied over an overall coat of sand brown as a primer coat, with the intention of letting this uniform basis shine through here and there. The distribution of the darker colors is quite unique, concentrating the brown on the vehicle’s edges and the green only to the flanks of hull and turret. However, the pattern works well on the huge E-50/75, and I can imagine that it might have worked well in an urban environment, breaking up the tank’s outlines.

As a match for the upper hull the wheels were painted uniformly in the same standard colors –without any pattern, because this would be very eye-catching while on the move. The many delicate tools on the tank’s hull are molded, and instead of trying to paint them I tried something else: I rubbed over them with graphite, and this worked very well, leaving them with a dark metallic shine. Just some wooden handles were then painted with a reddish brown.

 

Decals/marking came next, everything was procured from the scrap box. The Balkenkreuze came from a Hasegawa Sd.Kfz. 234/2 “Puma”, the tactical code from a TL-Modellbau sheet and the small unit badges on front and back from an UM Models Bergehetzer. A dry brushing treatment with light grey followed, highlighting surface details and edges, and after painting some details and adding some rust marks with watercolors followed a coat of matt varnish.

 

The tracks were painted with a cloudy mix of dark grey, red brown and iron acrylic paints, and mounted after hull and running gear had been assembled. The antennae, made from heated spure material, were mounted to the turret and, finally, the tank’s lower areas were dusted with a greyish-brown mineral pigment mix, simulating dust and mud residue.

  

This project was realized in just two days, made easy through the Trumpeter kit’s simple construction. Most work went into the extended turret and the different main weapon, but all parts mostly fell into place – and the result looks IMHO quite believable. In fact, the E-50/75 with a Flak 41 reminds a bit of the Italian Otomatic 76 mm SPAAG from the late Eighties?

 

Coachwork by Henri Chapron

 

Bonhams : the Zoute Sale

Sold for € 218.500

 

Zoute Grand Prix 2017

Knokke - Zoute

België - Belgium

October 2017

 

Just as it had done 21 years previously with the revolutionary 'Traction Avant', Citroën stunned the world again in 1955 with the launch of the strikingly styled 'DS'. Beneath the shark-like newcomer's aerodynamically efficient, low-drag bodyshell there was all-independent, self-levelling, hydro-pneumatic suspension; plus power-operated brakes, clutch, and steering. No European car would match the DS's ride quality for several years, the fundamental soundness of Citroën's ahead-of-its-time hydro-pneumatic suspension being demonstrated by its survival in top-of-the-range models until earlier this year. The DS's original 1,911cc, overhead-valve, long-stroke engine was replaced in 1966 by a short-stroke 1,985cc unit, also available in 2,175cc and 2,347cc versions, while other DS developments included swivelling headlights, fuel injection and a five-speed gearbox.

 

Other models offered alongside the original DS were the ID (a simplified, cheaper version), the cavernous Safari estate and the two-door Décapotable (convertible), the latter boasting coachwork by Henri Chapron. (Chapron's first convertibles had been produced independently of Citroën, but the factory eventually gave the project its blessing). Henri Chapron started his career in the motor industry as an upholsterer's apprentice, working for various coachbuilders in the Paris area. In 1919 he started his own business in the well-to-do Parisian suburb of Neuilly-sur-Seine where his main activity was re-bodying cars that had been requisitioned in wartime by the French Government. Chapron moved to larger premises in Levallois-Perret in 1923 and became the official builder of coach and convertible models for Delage and Delahaye, going on to body many of the most elegant French and European automobiles of the inter-war period.

 

Despite a much-reduced demand for bespoke coachwork after WW2, Chapron survived thanks to his exemplary creations for Delahaye, Talbot and Salmson, switching to offering bespoke versions of unitary construction models when motor manufacturers began to abandon the traditional separate chassis frame. The arrival of the Citroën DS in 1955 presented Chapron with a fresh opportunity that would result in his name being forever linked with this remarkable car.

 

Citroën's own Décapotables were built on the longer, stronger chassis of the ID Break (Estate) but the model was never produced in England, where Citroën's right-hand drive cars were assembled at its Slough factory up to 1966. In total, 1,365 usine (factory) convertibles were made with either the DS19 or DS21 engine between 1960 and 1971, while Chapron built a further 389 of his own, the last in 1973.

 

According to the Henri Chapron Attestation on file, this car was built by Citroën in November 1966 and sent to the Charon Factory in Levallois Perret on the 24th of that month. Production number '9088', this car was built in the Chapron workshops as were all the convertibles marketed by Citroën at this time. It was completed on 28th February 1967 and returned to Citroën to be sold by one of the company's concessionaires. Citroën had introduced the superior green Light Hydraulic Mineral (LHM) fluid on all hydro-pneumatically suspended models in September 1966, making this car one of the first to benefit from this advance. Having the pre-facelift nose and the green LHM system makes this car particularly rare; indeed we are advised that only 42 DS21 Décapotable models were completed to this specification.

 

On 27th March 1967 the DS was sold new via the Citroën dealer in Nice to its first owner, Mr Jean Thore of Eze in the South of France. Mr Thore and Mme Dominique Thore enjoyed the car for 34 years. They always kept it at Eze and covered approximately 90,000 kilometres during their ownership.

 

In 2001, Australian Mr John Plooy was looking for a 'green fluid' DS21 Cabriolet and chanced upon this car. He wanted to keep the Citroën in the Netherlands and use it for annual trips to Italy. When the car arrived in Holland, Mr Plooy immediately sent it to marque specialist Bart Kocken; it turned out to be in excellent original condition, with no rust or evidence of past accident damage. Mr Plooy commissioned a mechanical overhaul of anything that required it, and had the car repainted and a new convertible top fitted.

 

This Décapotable retains its original chassis, body panels, interior, Jaeger dashboard, carpets and FM radio, and is in excellent original condition overall, something seldom encountered with these cars. Mr Plooy drove the DS only some 10,000 kilometres over the years, and in 2017 decided to sell it, having reached the age of 80 years. Offered with its original tools, jack, Chapron paperwork, etc, this rare and ultra-desirable soft-top DS is ready for the next owner to use and enjoy.

TUESDAY, SEPTEMBER 29, 2015

Fortune Brainstorm E - Austin, TX, USA

 

9:45 AM

THE WIRED ENERGY CONSUMER

The race is on to control every aspect of the house from electric vehicle hookups, solar and storage systems to energy management, which includes smart products such as Internet connected thermostats and appliances. Technology, big data, sensors, massive processing power and mobile apps will help make tomorrow’s homes be more energy efficient. The businesses that control these smart products will be able to tap into a tremendous amount of data about the habits of Americans, presenting a huge, new marketing opportunity. The utilities want to dominant this new business but so do a lot of big home security, cable and Internet companies. Who will be the winners and losers?

 

Nick Akins, Chairman, President and CEO, American Electric Power Company

Ben Bixby, Director of Energy Products, Nest

Suzanne Shelton, Chief Executive Officer, Shelton Group

Dan Yates, Founder and CEO, Opower

Moderator: Stacey Higginbotham, Senior Editor, Fortune.com

 

Photograph by Stuart Isett/Fortune Brainstorm E

'Efficient', an Andrew Barclay 0-4-0 saddle tank (W/No.1598 built in 1918) shunting loaded bogie flat wagons at Shelton Steelworks during a photographic charter on 8th April 2000.

 

© Gordon Edgar - All rights reserved. Please do not use my images without my explicit permission

 

The loco is now at the Ribble Steam Railway, Preston and their website shows the following information:

 

'Efficient' was built at the Caledonia works of Andrew Barclay & Sons in Kilmarnock. It is a standard Barclay saddle tank with 14" x 22" cylinders and 3' 5" driving wheels. Painted in the Kilmarnock firms usual green lined livery and lettering, it spent it's entire working life at McKechnie Brothers' copper smelting works at Widnes. It shared the duties here with a smaller Barclay engine named 'Economic', which failed to live up to it's name and was scrapped in 1955. There were also two 100h.p. Sentinels as well.

 

When no longer required at the copper works 'Efficient' was purchased by the Liverpool Locomotive Preservation Group and moved to Seacombe in July 1969. From here, it worked the two Docker railtours in 1971 and 1972, double-headed with 'Lucy'. 'Efficient' moved to Southport in July 1973, where she had the distinction of being the first steam locomotive to enter the newly formed museum. She was fitted with a new inner firebox in 1981, and was a regular performer at Southport until the late 1990s when the site closed, eventually arriving at Preston on 27th July 1999. Efficient's last public steaming was in April 2000 as she took part in the closing celebrations at Shelton Steelworks in Stoke. A firm favourite amongst the crews at the museum, investigation was carried out during the summer of 2005 to bring the loco back into service.

 

Unfortunately, due to the extent of the work required on the boiler, she will have to wait her turn. She is on view in the museum in a 'as in industrial use' condition.

Bikini Swimsuit Model Goddess! Blonde California Surf Girl Laguna Beach! Pretty Blue Eyes & Pink Bikini Model Goddess! Tall, Thin, & Fit! 45SURF dx4/dt=ic 45EPIC

 

My Epic Book: Photographing Women Models!

geni.us/m90Ms

Portrait, Swimsuit, Lingerie, Boudoir, Fine Art, & Fashion Photography Exalting the Venus Goddess Archetype: How to Shoot Epic ...

 

All the photography, swimsuits, gold 45 revolver and 45surf logos, clothing designs, and lingerie are composed and designed in accordance with the golden ratio and divine proportion!

 

Dr. E’s Golden Ratio Principle: The golden ratio exalts beauty because the number is a characteristic of the mathematically and physically most efficient manners of growth and distribution, on both evolutionary and purely physical levels. The golden ratio ensures that the proportions and structure of that which came before provide the proportions and structure of that which comes after, thusly providing symmetry over not only space but time, and exalting life’s foundational dynamic symmetry. Robust, ordered, symmetric growth is naturally associated with health and beauty, and thus we evolved to perceive the golden ratio harmonies as inherently beautiful, as we saw and felt their presence in all vital growth and life. In the salient features and proportions of humans and nature alike, from the distribution of our facial features and bones to the arrangements of petals, leaves, and sunflowers seeds. As ratios between Fibonacci Numbers offer the closest whole-number approximations to the golden ratio, and as seeds, cells, leaves, bones, and other physical entities appear in whole numbers, the Fibonacci Numbers oft appear in the arrangement of nature’s discrete elements as “growth’s numbers.” From the dawn of time, humanity sought to salute their gods in art and temples exalting the same proportion by which they and all their vital sustenance, as well as all the flowers and nature’s epic beauty, had been created—the golden ratio.

 

Exalt your photography with Golden Ratio Compositions!

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Golden Ratio Compositions & Secret Sacred Geometry for Photography, Fine Art, & Landscape Photographers: How to Exalt Art with Leonardo da Vinci's, Michelangelo's!

 

Support epic fine art! 45surf ! Bitcoin: 1FMBZJeeHVMu35uegrYUfEkHfPj5pe9WNz

 

Light Time Dimension Theory's dx4/dt=ic graces all the clothes, swimsuits, and lingerie!

 

Proof of Light Time Dimension Theory's principle of a fourth expanding dimension:

 

Proof of ltd’s principle:

1. The velocity of every object through

Spacetime is c.

2. The velocity of light through the

Three spatial dimensions is always c.

3. If light had any velocity through x4,

Light’s total velocity would not be c.

4. Ergo light remains stationary in x4.

5. Thus light tracks and traces the

Movement and character of x4.

6. As light is a spherically-symmetric,

Probabilistic wavefront expanding

At c, x4 expands at the rate of c in a

Spherically-symmetric manner,

Distributing nonlocality.

QED

 

Beautiful Angel Goddess The Birth of Venus! White Summer Dress! 45Epic 45SURF Swimsuit Bikini Model! Beautiful Golden Ratio Composition Photography Surf Goddesses! Athletic Action Portraits of Swimsuit Bikini Models! High Res Venus! Sexy Hot dx4/dt=ic !

An automated packaging solution for all your packaging machine's needs and requirements is to complete the production line-up. To know more, visit Accutek Packaging Equipment, for efficient packagings such as filling, capping, labeling, washers, sealer, and many more. For further solution, contact us at +1 (760) 734-4177 or Visit us at www.accutekpackaging.com/

The cleanup of streets in New Orleans after Mardi Gras parades is phenomenal- one of the best shows of the season!! Efficient on another level! At the end of each final parade, the streets and neutral ground are CLEAR!

 

Mardi Gras 2017

New Orleans LA

To view more of my images, of Carrion and Birds of Prey, please click "here" !

 

"Click here" My Painting techneque! ............. Your turn to have a go; if you have Photoshop CS3, or later !

 

Rüppell's vulture or Rüppell's Griffon Vulture (Gyps rueppellii) is a large vulture that occurs throughout the Sahel region of central Africa. The current population of 30,000 is decreasing due to loss of habitat, deliberate poisoning by ivory poachers and other factors. Known also as Rüppell's griffon, Rueppell's griffon, Rüppell's griffin vulture, Rueppell's vulture and other variants, Rüppell's vulture is named in honor of Eduard Rüppell, a 19th-century German explorer, collector, and zoologist. Rüppell's vulture is considered to be the highest-flying bird, with confirmed evidence of a flight at an altitude of 11,300 m above sea level. These are large vultures, noticeably outsizing the closely related white-backed vulture, with which they often co-occur in the wild. Adults are 85 to 103 cm long, with a wingspan of 2.26 to 2.6 metres, and a weight that ranges from 6.4 to 9 kg Both genders look alike: mottled brown or black overall with a whitish-brown underbelly and thin, dirty-white fluff covering the head and neck. The base of the neck has a white collar, the eye is yellow or amber, the crop patch deep brown. Silent as a rule, they become vocal at their nest and when at a carcass, squealing a great deal. Rüppell's vultures are very social, roosting, nesting, and gathering to feed in large flocks. They are relatively slow birds, cruising at 35 kilometres per hour, but fly for 6-7 hours every day and will fly as far as 150 kilometres from a nest site to find food. Rüppell's vultures commonly fly at altitudes as high as 6,000 metres . The birds have a specialized variant of the hemoglobin alphaD subunit; this protein has a great affinity for oxygen, which allows the species to absorb oxygen efficiently despite the low partial pressure in the upper troposphere. A Rüppell's vulture was confirmed to have been ingested by a jet engine of an airplane flying over Abidjan, Côte d'Ivoire on November 29, 1973 at an altitude of 11,300 m During August 2010 a Rüppell's vulture escaped a bird of prey site in Scotland, prompting warnings to pilots in the area to watch carefully due to the danger of collision. Rüppell's vultures have several adaptations to their diet and are specialized feeders even among the Old World vultures of Africa. They have an especially powerful build and, after the most attractive soft parts of a carcass have been consumed, they will continue with the hide, and even the bones, gorging themselves until they can barely fly. They have backward-pointing spines on the tongue to help remove meat from bone. Despite their size, power and adaptations, they are not the most dominant vulture in their range, which is considered to be the even larger lappet-faced vulture.[11]Since first being assessed by the International Union for Conservation of Nature during 1988, populations of Rüppell's vulture have decreased. The species has been listed with an IUCN Red List status of "near threatened" since 2007 and the IUCN predicts that populations of the species will continue to decrease.[12] During 2012 the species was given Endangered status. Since 1992, Rüppell's vulture has been occurring as a vagrant in Spain and Portugal, with annual records since 1997, mainly in the Cadiz / Straits of Gibraltar area, but also further north.

 

From Wikipedia, the free encyclopedia

 

Irizar i6 Efficient

Watch the video here: youtu.be/KE18c9pA3pk

 

Here is a video I made to explain how to wash ands rub your hands efficiently with a hand sanitizer, step by step visual tutorial. I filmed it at CHU UCL Namur Hospital in Belgium.

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Hand sanitizer is a liquid or gel generally used to decrease infectious agents on the hands. Formulations of the alcohol-based type are preferable to hand washing with soap and water in most situations in the healthcare setting. It is generally more effective at killing microorganisms and better tolerated than soap and water. Hand washing should still be carried out if contamination can be seen or following the use of the toilet. The general use of non-alcohol based versions has no recommendations. Outside the health care setting, evidence to support the use of hand sanitizer over hand washing is poor. They are available as liquids, gels, and foams.

 

Hand sanitizer that contains at least 60 % alcohol or contains a "persistent antiseptic" should be used. Alcohol rubs kill many different kinds of bacteria, including antibiotic resistant bacteria and TB bacteria. 90% alcohol rubs are highly flammable, but kill many kinds of viruses, including enveloped viruses such as the flu virus, the common cold virus, coronaviruses, and HIV, though is notably ineffective against the rabies virus.

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The BMW i8, first introduced as the BMW Concept Vision Efficient Dynamics, is a plug-in hybrid sports car developed by BMW. The 2015 model year BMW i8 has a 7.1 kWh lithium-ion battery pack that delivers an all-electric range of 37 km (23 mi) under the New European Driving Cycle (NEDC).[5] Under the United States Environmental Protection Agency (EPA) cycle, the range in EV mode is 24 km (15 mi) with a small amount of gasoline consumption.

 

The BMW i8 can go from 0–100 km/h (0 to 60 mph) in 4.4 seconds and has a top speed of 250 km/h (155 mph). The BMW i8 has a fuel efficiency of 2.1 L/100 km (134.5 mpg-imp; 112.0 mpg-US) under the NEDC test with carbon emissions of 49 g/km. EPA rated the i8 combined fuel economy at 76 equivalent (MPG-equivalent) (3.1 L gasoline equivalent/100 km; 91 mpg-imp gasoline equivalent).

 

The initial turbodiesel concept car was unveiled at the 2009 International Motor Show Germany. The production version of the BMW i8 was unveiled at the 2013 Frankfurt Motor Show. The i8 was released in Germany in June 2014. Deliveries to retail customers in the U.S. began in August 2014. Global cumulative sales totaled almost 4,500 units through June 2015.

 

History

 

The i8 is part of BMW's "Project i" and it is being marketed as a new brand, BMW i, sold separately from BMW or Mini. The BMW i3, launched for retail customers in Europe in the fourth quarter of 2013, was the first model of the i brand available in the market, and it was followed by the i8, released in Germany in June 2014 as a 2015 model year. Other i models are expected to follow.

 

The initial turbodiesel concept car was unveiled at the 2009 International Motor Show Germany, In 2010, BMW announced the mass production of the Concept Vision Efficient Dynamics in Leipzig beginning in 2013 as the BMW i8. The BMW i8 gasoline-powered concept car destined for production was unveiled at the 2011 Frankfurt Motor Show. The production version of the BMW i8 was unveiled at the 2013 International Motor Show Germany. The following are the concept and pre-production models developed by BMW that precedeed the production version.

 

BMW Vision EfficientDynamics (2009)

 

BMW Vision EfficientDynamics concept car is a plug-in hybrid with a three cylinder turbodiesel engine. Additionally, there are two electric motors with 139 horsepower. It allows an acceleration to 100 km/h (62 mph) in 4.8 seconds and an electronically limited top speed of 250 km/h (160 mph).

 

According to BMW, the average fuel consumption in the EU test cycle (KV01) is 3.76 liters/100 kilometers, (75.1 mpg imp), and has a carbon dioxide emission rating of 99 grams per kilometer (1,3 l/100 km and 33g CO2/km ; EU-PHEV ECE-R101). The estimated all-electric range is 50 km (31 mi), and the 24-liter petrol tank extends the total vehicle range to up to 700 km (430 mi). The lightweight chassis is made mainly from aluminum. The windshield, top, doors and fenders are made from polycarbonate glass, with the body having a drag coefficient of 0.26.

 

The designers in charge of the BMW Vision EfficientDynamics Concept were Mario Majdandzic, Exterior Design and Jochen Paesen, Interior Design.

 

The vehicle was unveiled in 2009 International Motor Show Germany, followed by Auto China 2010.

 

BMW i8 Concept (2011)

 

BMW i8 Concept plug-in hybrid electric vehicle includes an electric motor located in the front axle powering the front wheels rated 96 kW (131 PS; 129 hp) and 250 N·m (184 lb·ft), a turbocharged 1.5-liter 3-cylinder gasoline engine driving rear wheels rated 164 kW (223 PS; 220 hp) and 300 N·m (221 lb·ft) of torque, with combined output of 260 kW (354 PS; 349 hp) and 550 N·m (406 lb·ft), a 7.2 kWh (26 MJ) lithium-ion battery pack that allows an all-electric range of 35 km (22 mi). All four wheels provide regenerative braking. The location of the battery pack in the energy tunnel gives the vehicle a low centre of gravity, enhancing its dynamics. Its top speed is electronically limited to 250 km/h (160 mph) and is expected to go from 0 to 100 km/h (0 to 60 mph) in 4.6 seconds. Under normal driving conditions the i8 is expected to deliver 80 mpg-US (2.9 L/100 km; 96 mpg-imp) under the European cycle. A full charge of the battery will take less than 2 hours using 220V. The positioning of the motor and engine over the axles results in optimum 50/50 weight distribution.

 

The vehicle was unveiled at the 2011 International Motor Show Germany, followed by CENTER 548 in New York City, 42nd Tokyo Motor Show 2011, 82nd Geneva Motor Show 2012, BMW i Born Electric Tour at the Palazzo delle Esposizioni at Via Nazionale 194 in Rome, Auto Shanghai 2013.

 

This concept car was featured in the film Mission: Impossible – Ghost Protocol.

 

BMW i8 Concept Spyder (2012)

 

The BMW i8 Concept Spyder included a slightly shorter wheelbase and overall length over the BMW i8 Concept, carbon-fibre-reinforced plastic (CFRP) Life module, drive modules made primarily from aluminium components, interlocking of surfaces and lines, 8.8-inch (22.4 cm) screen display, off-white outer layer, orange tone naturally tanned leather upholstery.

 

The vehicle was unveiled in Auto China 2012 in Beijing and won Concept Car of the Year, followed by 83rd Geneva International Motor Show 2013.

 

The designer of the BMW i8 Concept Spyder was Richard Kim.

 

BMW i8 coupe prototype (2013)

 

The design of the BMW i8 coupe prototype was based on the BMW i8 Concept. The BMW i8 prototype has an average fuel efficiency of less than 2.5 L/100 km (113.0 mpg-imp; 94.1 mpg-US) under the New European Driving Cycle with carbon emissions of less than 59 g/km. The i8 with its carbon-fiber-reinforced plastic (CFRP) passenger cell lightweight, aerodynamically optimized body, and BMW eDrive technology offers the dynamic performance of a sports car, with an expected 0–100 km (0–60 mi) sprint time of less than 4.5 seconds using both power sources. The plug-in hybrid system of the BMW i8 comprises a three-cylinder, 1.5-liter BMW TwinPower turbo gasoline engine combined with BMW eDrive technology used in the BMW i3 and develops maximum power of 170 kW (230 hp). The BMW i8 is the first BMW production model to be powered by a three-cylinder gasoline engine and the resulting specific output of 115 kW (154 hp) per liter of displacement is on a par with high-performance sports car engines and is the highest of any engine produced by the BMW Group.

 

The BMW i8's second power source is a hybrid synchronous electric motor specially developed and produced by the BMW Group for BMW i. The electric motor develops maximum power of 131 hp (96 kW) and produces its maximum torque of around 320 N·m (240 lbf·ft) from standstill. Typical of an electric motor, responsive power is instantly available when starting and this continues into the higher load ranges. As well as providing a power boost to assist the gasoline engine during acceleration, the electric motor can also power the vehicle by itself. Top speed in electric mode is approximately 120 km/h (75 mph), with a maximum driving range of up to 35 km (22 mi). Linear acceleration is maintained even at higher speeds since the interplay between the two power sources efficiently absorbs any power flow interruptions when shifting gears. The BMW i8 has an electronically controlled top speed of 250 km (160 mi), which can be reached and maintained when the vehicle operates solely on the gasoline engine. The model-specific version of the high-voltage 7.2 lithium-ion battery has a liquid cooling system and can be recharged at a conventional household power socket, at a BMW i Wallbox or at a public charging station. In the US a full recharge takes approximately 3.5 hours from a conventional 120V, 12 amp household circuit or approximately 1.5 hours from a 220V Level 2 charger.

 

The driver can also select several driving modes: SPORT, COMFORT and ECO PRO. Using the gear selector, the driver can either select position D for automated gear selection or can switch to SPORT mode. SPORT mode offers manual gear selection and at the same time switches to very sporty drive and suspension settings. In SPORT mode, the engine and electric motor deliver extra performance, accelerator response is faster and the power boost from the electric motor is maximized. And to keep the battery topped up, SPORT mode also activates maximum energy recuperation during overrun and braking as the electric motor’s generator function, which recharges the battery using kinetic energy, switches to a more powerful setting. The Driving Experience Control switch on the center console offers a choice of two settings. On starting, COMFORT mode is activated, which offers a balance between sporty performance and fuel efficiency, with unrestricted access to all convenience functions. Alternatively, the ECO PRO mode can be engaged, which, on the BMW i8 as on other models, supports an efficiency-optimized driving style. On this mode the powertrain controller coordinates the cooperation between the gasoline engine and the electric motor for maximum fuel economy. On deceleration, the intelligent energy management system automatically decides, in line with the driving situation and vehicle status, whether to recuperate braking energy or to coast with the powertrain disengaged. At the same time, ECO PRO mode also programs electrical convenience functions such as the air conditioning, seat heating and heated mirrors to operate at minimum power consumption, but without compromising safety. The maximum driving range of the BMW i8 on a full fuel tank and with a fully charged battery is more than 500 km (310 mi) in COMFORT mode, which can be increased by up to 20% in ECO PRO mode. The BMW i8’s ECO PRO mode can also be used during all-electric operation. The vehicle is then powered solely by the electric motor. Only if the battery charge drops below a given level, or under sudden intense throttle application such as kickdown, is the internal combustion engine automatically activated.

 

The vehicle was unveiled in BMW Group's Miramas test track in France.

 

Production version

 

The production BMW i8 was designed by Benoit Jacob. The production version was unveiled at the 2013 International Motor Show Germany, followed by 2013 Les Voiles de Saint-Tropez. It features butterfly doors, head-up display, rear-view cameras and partially false engine noise. Series production of customer vehicles began in April 2014. It is the first production car with laser headlights, reaching further than LED lights.

 

The i8 has a low vehicle weight of 1,485 kg (3,274 lb) (DIN kerb weight) and a low drag coefficient (Cd) of 0.26. In all-electric mode the BMW i8 has a top speed of 120 km/h (75 mph). In Sport mode the i8 delivers a mid-range acceleration from 80 to 120 km/h (50 to 75 mph) in 2.6 seconds. The electronically controlled top speed is 250 km/h (160 mph).

 

Range and fuel economy[edit]

The production i8 has a 7.1 kWh lithium-ion battery pack with a usable capacity of 5.2 kWh and intelligent energy management that delivers an all-electric range of 37 km (23 mi) under the NEDC cycle. Under the EPA cycle, the range in EV mode is 15 mi (24 km), with a gasoline consumption of 0.1 gallons per 100 mi, and as a result, EPA's all-electric range is zero. The total range is 330 mi (530 km).

 

The production version has a fuel efficiency of 2.1 L/100 km (134.5 mpg-imp; 112.0 mpg-US) under the NEDC test with carbon emissions of 49 g/km.[5] Under EPA cycle, the i8 combined fuel economy in EV mode was rated 76 equivalent (MPG-equivalent) (3.1 L gasoline equivalent/100 km; 91 mpg-imp gasoline equivalent), with an energy consumption of 43 kW-hrs/100 mi and gasoline consumption of 0.1 gal-US/100 mi. The combined fuel economy when running only with gasoline is 28 mpg-US (8.4 L/100 km; 34 mpg-imp), 28 mpg-US (8.4 L/100 km; 34 mpg-imp) for city driving, and 29 mpg-US (8.1 L/100 km; 35 mpg-imp) in highway.

 

The U.S. Environmental Protection Agency's 2014 edition of the "Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends" introduced utility factors for plug-in hybrids to represent the percentage of miles that will be driven using electricity by an average driver, in electric only or blended modes. The BMW i8 has a utility factor in EV mode of 37%, compared with 83% for the BMW i3 REx, 66% for the Chevrolet Volt, 65% for the Cadillac ELR, 45% for the Ford Energi models, 43% for the McLaren P1, 39% for the Porsche Panamera S E-Hybrid, and 29% for the Toyota Prius PHV.

 

[Text from Wikipedia]

 

en.wikipedia.org/wiki/BMW_i8

 

This Lego miniland-scale BMW i8 has been created for Flickr LUGNuts' 94th Build Challenge, - "Appease the Elves Summer Automobile Build-off (Part 2)", - a design challenge combining the resources of LUGNuts, TheLegoCarBlog (TLCB) and Head Turnerz.

ST23 TAR

Irizar i6 Efficient / Scania K360CB4

Star Coaches of Batley

 

Location: Whitestone Corner Roundabout, Shepton Mallet

Date: 30/06/2025

Just flowering

oh, oh

on my Smartphone the colors weren't so rich!

If we weren't so efficient at catching them, because they grow their entire life.

 

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Mittelenglisch nennt man die Form der englischen Sprache, die etwa zwischen dem 12. und der Mitte des 15. Jahrhunderts gesprochen wurde.

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Sie teilen dieselbe bio-georaphische Klimaregion: Atlanisch.

 

Biogeographic Region: Atlantic

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Das Altenglische entstand, als die Angeln, Jüten, Friesen und Sachsen sich ab ca. 450 in Britannien ansiedelten.

Altenglisch wurde ursprünglich mit Runen geschrieben, übernahm nach der Bekehrung zum Christentum jedoch das lateinische Alphabet, dem man einige Zeichen hinzufügte. So etwa wurde der Buchstabe Yogh aus dem Irischen übernommen, der Buchstabe ð (eth) war eine Abwandlung des lateinischen d, und die Buchstaben þ (thorn) und ƿ (wynn) stammen aus dem Fuþorc (der anglo-friesischen Variante der gemeingermanischen Runenreihe, dem älteren Fuþark).

 

Für Sprecher des modernen Englisch ist diese Sprachstufe ohne gezieltes Erlernen nicht mehr verständlich. Sie ist eine eng mit dem Friesischen und Niederdeutschen verwandte westgermanische Sprache und gehört der Gruppe der germanischen Sprachen an, einem Hauptzweig der indoeuropäischen Sprachfamilie.

Die angelsächsische Sprache spaltete sich ab dem 5. Jahrhundert vom kontinentalen Westgermanisch ab, als die Angeln, Sachsen, Friesen und Jüten sich in Britannien ansiedelten (Schlacht von Mons Badonicus). Vom 8. Jahrhundert an ist sie schriftlich belegt und erreicht um 1000 ein hohes Maß an Standardisierung (Spätwestsächsisch der „Schule von Winchester“).

Aus den vorher auf der Insel gesprochenen keltischen Sprachen übernahm das Angelsächsische nur sehr wenige Lehnwörter.

...

Durch die dänische und norwegische Einwanderung ab dem 8. Jahrhundert hat die englische Sprache gegenüber der altsächsischen Sprache auch zahlreiche nordgermanische Elemente integriert, die allerdings erst in den mittelenglischen Texten in größerer Zahl auftauchen, darunter neben einigen hundert anderen Wörtern so zentrale Begriffe wie sky, leg und das moderne Pronomen they.

 

Stärker noch als in der niedersächsischen Sprache wurden auch Elemente der lateinischen Sprache aufgenommen, insbesondere im Bereich des religiösen Wortschatzes.

 

Die Dialektsprecher auf dem Festland und der Insel konnten sich miteinander verständigen.

Einschnitt:

 

Mit der Eroberung Englands durch die französischen Normannen 1066

wurde die Sprache durch den französischen Einfluss aus der Normandie so sehr verändert, dass man sie ab diesem Zeitpunkt als mittelenglische Sprache bezeichnet.

  

...

Thema - you - they.

 

Um mehr zu sagen, ist die etymologische Seite dieses "Problems" sehr erhellend: Früher im Altenglischen war das ursprüngliche Wort für "Du" - "thou" - man findet es noch in alten sakralen Texten und Liedern. Und Ihr hieß ye- ye bezog sich also auf mehr als einen Anzuredenden.

 

Dann nach der normannischen Eroberung fand ein Einzug französischer Sprachelemente ins Englische statt, dies nennt sich Mittelenglische Zeit. "Thou" wurde langsam ersetzt durch "ye" da die französisch-höfische Sitte den Plural vorschrieb, um eine höherstehende Person anzusprechen, dies übertrug sich später auf gleichgestellte Personen.

 

Jedoch verblieb "thou" noch lange Zeit im Sprachgebrauch. Die Unterscheidung zwischen formaler und nicht-formaler Anrede kam von der üblich Anrede von Königen und anderen höfischen Adelspersonen im Plural. Das wurde schließlich weiter ausgedehnt, um jedwede höhergestellte Person oder Unbekannte mit dem Pluralwort "ye" anzureden. Denn dies wurde als höf-licher ! empfunden.

 

Das französische "tu" wurde als ein sehr intimes oder herablassendes Anredewort empfunden, einem Fremden gegenüber insbesondere als beleidigend. Im 18. Jahrhundert schrieb Samuel Johnson (ein sehr einflußreicher Gelehrter seiner Zeit, Autor, Essayist, Kritiker, Verfasser des ersten maßgeblichen Lexikons der Englischen Sprache) in seinem Werk: A Grammar of the English Tongue: "im zeremoniellen Sprachgebrauch..wird die zweite Person Plural für die zweite Person Singular verwendet..". Vergleichsweise schreibt The Merriam Webster Dictionary of English Usage, dass um 1650 herum bei den meisten Sprechern des südbritannischen Englisch "thou" unüblich geworden war, sogar im informalen Sprachgebrauch unter Freunden nicht mehr verwendet wurde.

 

Also wir erkennen: Das Wörtchen "thou" war veraltet, und das "ye" hat sich einfach als das gebräuchlichere Wort für "du", also die 2. Person Singular, eingeschlichen gehabt, weil man wohl zum einen sich dem Adel dadurch näher fühlte, also sich sozial aufgewertet sah, und die Gefahr, unhöflich zu sein, verringert wurde. Interessantes

Nebendetail:

 

auch heute gibt es in England noch einen Ort , wo das "thou" noch lebt im Sprachgebrauch:Lichfield, Staffordshire, wo Dr. Samuel Johnson geboren wurde. Und natürlich richtet sich das Verb nach dem Mehrzahlpronomen "ye", das "ye" das zum heutigen "you" verschmolzen ist!

de.wikipedia.org/wiki/Altenglisch

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The morning sunrise in Condobolin in far western NSW starts to warm up the town as VL362, VL353 and GL109 shunt 8890 back onto the mainline, having stabled the previous night in the yard after traveling from Broken Hill. The train consisted of CQMY wagons being transferred from Bowmans in South Australia to Bathurst and was operated by Sydney Rail Services.

The engines would travel light engine to Goulburn as D890 after dropping the wagons off the following day.