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Joline Blais prompts participants to design burritos from ingredients gathered a local South LA markets and based on permaculture principles, during Still Water: What Networks Need to Thrive at the School of Cinematic Arts Gallery, University of Southern California.
Part of Redesigning Reality, a series sponsored by USC's Visions and Voices [web-app.usc.edu/ws/eo2/calendar/113/event/893758].], Media Arts and Practice PhD program [imap.usc.edu/]. and Institute for Multimedia Literacy [iml.usc.edu].
JUBA, SOUTH SUDAN, 30 MARCH: Force Commander, Mohan Subramanian, currently leads the military component at UNMISS.
On 5 July 2022, United Nations Secretary-General António Guterres appointed Lieutenant General Subramanian as his new Force Commander for UNMISS.
Photos by Gregório Cunha/UNMISS
The laser mounts I designed turned out not to fit - a slight scaling error between the SVG original and illustrator export. Eventually I turned the mounts around and drilled two 12MM holes that fitted the lasers almost exactly.
Some duck tape did the rest - something to recon with in a next iteration
© M J Anahory. These images are protected by copyright. You cannot copy or republish this photo without written consent of the copyright holder. Any copyright infringements will be followed up with action legal or otherwise.
This is the "clean" PCB, as seen through the magnifying glass.
The idea is to join the dots... placing the right components in between. Luckily there's always a shema printed on the reverse of the PCB ;)
Paul Component Engineering makes some of the most precise and beautiful components in the world. They've been doing it for 20 years and they'll be doing it for many to come.
Based in Chico CA they're making the dream - pared back, entirely functional pieces which operate exactly as they should every time. It's this attention to craft and performance that has made Paul's work truly iconic.
The Cross Lever is simple and comfortable. It won't ruin the line of a bar and can be used either in-line (routing the cables through drops - useful in CX) or stand-alone. We carry it with a 26.0mm and in black or silver.
EUROBIKE, 28 August 2014. Lectures on LEV Components within the LEV Components Special Exhibition.
Read the article: extraenergy.org/main.php?language=en&category=&su...
via
It is often overlooked what a decisive influence seals and gaskets have on the function and service life of machines and systems.
Proportional valves, for example, are limited in their function and endangered even from dirt particle sizes of 3 μm. Rolling bearings, on the other hand, are considerably impaired in terms of their service life by water content in the lubricant of just 200 ppm and can be damaged.
Seals basically fulfill two tasks for rotating or linear components: On the one hand, they protect the sensitive inner life of the machine elements from contamination, and on the other hand, they protect the environment from leaking lubricants or hydraulic operating fluids, for example.
Criteria for seal and gasket selection
In principle, three criteria apply when selecting the right seal:
1. Design specifications: Here, it is important to consider how the components behave towards each other.
2. Chemical and physical loads: Here it must be taken into account how large or different the pressure conditions are and how they behave with the temperatures. It must be checked whether friction occurs. An important aspect is whether sealing is required against corrosive substances that could attack the sealing material.
3. In the area of economy and assembly, the number of seals required must be taken into account and how the maintenance requirements are to be assessed.
What forms of gaskets and seals are there?
Basically, there are two forms of seals: Dynamic seals are used where the interfaces move. Static seals, on the other hand, are used where the interfaces are at rest. Examples of static seals are metal O-rings, flange seals or liquid seals. In general, the following applies: Since dynamic seals can only be realized by means of a gap – albeit a very narrow one – between the sealing surfaces, a 100-percent seal cannot be guaranteed. Often, however, these “leaks” are intentional, since the minimal escaping substances serve as lubricant. However, the leakage must not be too large to prevent serious damage.
Materials for gaskets
The operating temperature range and media resistance are the most important criteria when selecting materials for seals.
Nevertheless, the mechanical-technological values of an elastomer compound must be taken into account in an appropriate manner, as they are decisive for the service life of the seal.
Gasket material Flexseal NBR – acrylonitrile-butadiene rubber
NBR is one of the most widely used materials for seals. It is used in many areas due to its good mechanical properties and resistance to mineral oil-based lubricating oils and greases. However, good resistance to fuels is usually only achieved with special compounds.
The properties of Flexseal NBR are mainly determined by the acrylonitrile content (ACN between 18% and 50%). A low ACN content of NBR leads to good low-temperature flexibility but limited resistance to oils and fuels; as the ACN content increases, the low-temperature flexibility of Flexseal NBR decreases and the resistance to oils and fuels increases.
The NBR standard material has a medium ACN content to cover a wide range of applications as a gasket material with balanced properties. Flexseal NBR shows good mechanical-technological values, e.g. high abrasion resistance and good resistance to mineral oil-based lubricating oils and greases, hydraulic oils H, H-L, H-LP, flame-retardant pressure fluids HFA, HFB, HFC, aliphatic hydrocarbons, silicone oils and greases, water up to approx. +80 ͦ C.
Flexseal NBR is not resistant to aromatic and chlorinated hydrocarbons, fuels with a high aromatic content, polar solvents, glycol-based brake fluids and flame-retardant pressure fluids HFD.
The ozone, weathering and aging resistance of Flexseal NBR is low. In the majority of applications, e.g. when the material is wetted with oil, the low ozone, weathering and aging resistance does not have a negative effect.
Flexseal NBR is also available as a fabric reinforced version. Cotton or synthetic fibre fabrics can be used as the basis for rubber-fabric materials. Cotton fabric is used as standard for hydraulic seals. Outside the standard, a whole range of other types of fabric and almost all elastomers are available for impregnation.
Seal Flexseal FKM – fluorinated rubber
Flexseal FKM materials are characterized by their very high temperature and chemical resistance. In addition, the very good resistance to aging and ozone, the very low gas permeability (and thus good suitability for use in a vacuum) and the self-extinguishing fire behavior are also worth mentioning.
The FKM standard sealing material shows very good resistance properties in mineral oils and mineral greases, aliphatic, aromatic and chlorinated hydrocarbons, fuels, flame-retardant pressure fluids HFD and many organic solvents and chemicals.
In addition to the standard FKM materials, various special compounds are available, which are tailored for special sealing applications due to the different composition of the polymer chains and varying fluorine contents (65% to 71%).
FKM is generally not resistant to hot water, steam, polar solvents, glycol-based brake fluids and low-molecular organic acids.
Gasket material Flexseal EPDM – ethylene-propylene-diene rubber
EPDM materials generally show good resistance to hot water, steam, aging and chemicals as well as a wide thermal application range. They are used in many general sealing applications. They are divided into sulphur and peroxide cross-linked grades, whereby the peroxide EPDM compounds are thermally more resistant and show a significantly lower compression set.
EPDM has good resistance to hot water and steam, detergents, caustic soda and potash solutions, silicone oils and greases, many polar solvents, many diluted acids and chemicals. Special qualities are recommended for glycol-based brake fluids.
EPDM materials are absolutely incompatible with all mineral oil products (lubricants, fuels).
The temperature application limits of the Flexseal EPDM sealing material are – 45 ͦ C to +130 ͦ C (- 50 ͦ C to +150 ͦ C peroxide crosslinked).
Sealing material Flexseal VMQ – silicone rubber
Silicone rubbers are characterized in particular by their wide thermal application range and excellent resistance to ozone, weathering and aging. The mechanical properties of silicone are rather low compared to other elastomers. However, silicone types reinforced with glass fiber are available which are mechanically much more resilient than pure silicone sheets. In general, silicone materials are physiologically harmless, i.e. they are used in food-related and medical areas, among others.
The silicone standard material can be used in the temperature range from – 55 ͦ C to +200 ͦ C and is resistant to water (up to 100 ͦ C), aliphatic motor and transmission oils, animal and vegetable oils and fats.
Flexseal Silicone is generally not resistant to fuels, aromatic mineral oils, water vapor (briefly up to 120 ͦ C possible), silicone oils and greases, acids and alkalis.
Sealing material Flexseal TPU – Thermoplastic Polyurethane
Flexseal TPU materials belong to the group of thermoplastic elastomers (TPE’s). The strength of TPU’s lies in the combination of its good properties, both physical and chemical, as well as processing and economic. TPU is produced as standard on thermoplastic injection moulding machines and has been established for many years in sealing technology, especially in hydraulic applications.
TPU materials stand out from classic elastomers due to their significantly higher mechanical strength. Other outstanding material properties include high abrasion, wear and extrusion resistance, high compressive strength and high tear and tear propagation resistance.
The TPU material shows good flexibility (even in the upper hardness range) in the temperature application range from -40 ͦ C to +100 ͦ C and very good resistance to aging and ozone. TPU is well suited for use in mineral oils and greases, hydraulic oils H, HL, HLP, silicone oils and greases, flame-retardant pressure fluids HFA and HFB and water up to 50 ͦ C as well as pure aliphatic hydrocarbons.
Gasket material Tecfilm PTFE – Polytetrafluorethylene
PTFE is a fluorinated plastic. PTFE has a number of positive properties that have become indispensable in sealing technology. It is characterized by its almost universal resistance to chemicals, the wide temperature application range from -100 ͦ C to +250 ͦ C, an extremely low coefficient of friction and the resulting very good sliding properties, no stick-slip effect, special rigidity and almost unlimited resistance to ozone, weathering and aging. Almost all known hydraulic media, lubricants, chemicals and solvents cannot harm PTFE.
Only elementary fluorine and alkali metals attack it at high temperatures and pressures. Pure PTFE does not contain any extractable substances that could migrate and have an unfavorable effect on adjacent materials. It is therefore physiologically harmless and also particularly suitable for food, pharmaceutical and medical applications. PTFE is not flammable and therefore does not pose any additional danger in case of fire.
PTFE is not or only slightly elastic. Therefore, PTFE sealing elements are activated by elastic preloading elements in the form of O-rings or stainless steel springs.
However, PTFE also has certain disadvantages, such as the tendency to cold flow or creep of pure PTFE under pressure load. However, these weaknesses are compensated for in the sealing compounds by the addition of fillers. Fillers, such as bronze-filled compounds, give PTFE the ability to adapt to most operating conditions.
Gaskets with aramid fibers
Aramids are organic synthetic fibers that are characterized by special properties. In the form of gaskets, they are particularly suitable for use at higher temperatures, under pressure and for liquid media.
Aramid fiber gaskets are characterized by high tensile strength, high pressure resistance. They are heat and fire resistant and have good sealing properties as well as excellent chemical resistance. Gaskets with aramid fibers are available in a variety of combinations, each with its own property profile.
Our aramid fiber gaskets meet the requirements of the DVGW (German Technical and Scientific Association for Gas and Water) for drinking water approval. This makes them ideal for use in water pipes.
Depending on the region and requirements, we can supply material with different approvals (KTW, W270, WRAS, ACS).
The post Gaskets: important components appeared first on Dr. Dietrich Müller GmbH.
EUROBIKE, 28 August 2014. Lectures on LEV Components within the LEV Components Special Exhibition.
Read the article: extraenergy.org/main.php?language=en&category=&su...
EUROBIKE, 28 August 2014. Lectures on LEV Components within the LEV Components Special Exhibition.
Read the article: extraenergy.org/main.php?language=en&category=&su...
The brakes were by far the biggest cause for concern, once the loco was disassembled. All the components were heavily worn.
4th. October 2016. Photo courtesy Nick Noon
EUROBIKE, 28 August 2014. Lectures on LEV Components within the LEV Components Special Exhibition.
Read the article: extraenergy.org/main.php?language=en&category=&su...
TRP offers a new line of durable clutch replacement components including clutch brakes, pilot bearings, clutch release yokes and clutch installation kits. Among the components offered, the new line features hinged locking clutch brakes and high temperature pilot bearings that withstand hotter temperatures. The hinged locking clutch brakes, including torque limiting and two-piece clutch brakes, are available in 1 ¾-inch and 2-inch sizes.
Today's deal of the day is this used Cannondale R800 road bike, ca. 2001/02.
It is in superb condition spec'd with full Ultegra components and at 52cm in size it is perfect for a young cyclist new to road biking.
The price tag is only $500.
Used Cannondale R800
52cm frame
Ultegra deraileurs
Ultegra Flightdeck brake / shift levers
Ultegra brakes
Ultegra Crankset (53/39)
Mavic Classic Elite hubs and rims (w/straight pull spokes)
If you'd like to adopt this bicycle you can swing by the Elmore Cycle & Fitness anytime (M-F 10-6 / Sat 9-3) or call us at 419-862-1000
Other used bikes in stock:
$1299 Laser Blue X3 USX Recumbent Trike (like new!)
$250 Black Fuji Allegro road bike 62cm
$200 Nishiki Tamarack 20" (like new!)
$200 Giant Farrago Hybrid 18" (w/ Rack and Computer)
$125 Mongoose Menace BMX bike 20"
$125 Diamondback Outlook 24" kids mountain bike
Alisha and Amy cutting components during a workshop I convened to produce furniture for future publics, part of What Happens to Us a project that examines democracy as a system of community formation
Communities don’t just happen, they’re made.
Curated by Marsha Bradfield and Amy McDonnell
Paul of Paul Component Engineering shows his new 120mm dishless front disc hub for use in 29" wheels. He designed this hub to address issues with wheel strength in the big mountain bike wheels.
Reference shot.
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FISSILE CORE STORAGE –
The fissile cores were stored in small buildings arranged around the large non-nuclear component stores. In total there are 57 of these buildings, which are divided into 48 Type 'A' and 9 Type 'B' stores. The fissile core stores are organised in four uneven groups around the non-nuclear stores. The two southerly groups of stores are arranged symmetrically to the south of the large non-nuclear stores, each group having sixteen small store buildings. The north-eastern group contains eleven stores and the north-west group fourteen. All but the south-east group contained a mixture of Type 'A' and Type 'B' stores.
The store buildings are linked together by pedestrian width walkways, fenced by tubular steel pipes 37in tall with strands of white between the horizontal members. The area was lit by pre-cast concrete lamp-posts, each of which had a red panic button at chest height. The Type 'A' storage buildings 1-48 are small kiosk-like structures. In plan they measure 8ft 4in by 7ft 10in and stand 9ft above ground level. The foundations of the building are constructed of 3ft thick mass concrete. The walls are of cavity wall construction and are formed of solid concrete blocks, while the roof is a flat over-hanging reinforced concrete slab with a drip mould, and is covered with bituminous felt. The design drawing (Drg. No. 3563B/52) shows a variety of irregular roof plans designed to disguise the structures from the air. These were never built, all the roofs being rectangular in plan.
Fittings on the walls indicate that they were all originally protected by copper earthing straps. On the front of many of the stores a stencilled notice records ''Date of last lightning conductor test April - 63''. Internally the walls are finished in unpainted, smooth gritless plaster. The side and rear walls are ventilated by four small controllable ventilators, two at the base of the wall and two at the top. In the floor of each of the Type 'A' stores is a single keyhole shaped cavity. Each hole is 1ft 5in in diameter and 1ft 9in deep. The shaft of the hole measures 10in wide and is 8in long and is shallower than the main hole at 3½in. A scar around the hole suggests it originally contained a vessel with the asphalt brought up around its lip. This is confirmed by the survival of the surrounding lip in similar stores at RAF Faldingworth, Lincolnshire, and by the rare survival of a number of stainless steel vessels at the bomb store at RAF Gaydon, Warwickshire.
The electrical system of each store was contained within small bore metal pipes; circular junction boxes led to other electrical fittings, which have in most cases been removed. In a number of the stores 'Walsall' Type 1174X flameproof switch boxes remained. On their covers is cast ''5 Amp 250 Volt Flameproof switchbox type Walsall 1174BX Group 2 FLP 302 Group 3 Test P60 Isolate supply elsewhere before removing this cover''. A small formica sign confirmed that ''The electrical installation in this building is standard 'A' in accordance with AP 2608A''. All the stores originally had external fuse boxes to the left of their doors.
The doors are wooden and open outwards, their outer faces being protected by a steel sheet. They are secured by a combination lock and internal vertical locking bar operated by an external handle. A metal fitting in the path allowed the door to be secured half ajar. Above the door, and attached to its frame, is a spring-loaded electrical contact, which probably recorded on the control board in building 63 whether or not the door was open or closed. Externally and internally the doors are painted light blue. On the door of building No. 1 is a 1ft diameter radiation symbol in yellow and out-lined in black, below it is a 11½in yellow square with a black star at its centre.
The Type 'B' store buildings 49-57 are slightly larger than the Type 'A' measuring 9ft 7in by 7ft 10n. Otherwise the details of the stores are identical to the smaller stores. The principle difference between the two types of structures is that the Type 'B ' had two storage holes in their floors. Each of these buildings was also equipped with a small wooden counter adjacent to the doors; the counters measure 2ft 6in by 1ft 6in and standing 4ft tall. They have been removed from stores 53 and 55. At some point during the operational life of the station the holes in the floors of all the Type 'B' stores were filled and covered by gritless asphalt. The asphalt surfaces in the stores are continuous, often with a slight depression marking the position of the holes, which implies that the original floor was lifted and new floors laid. The holes in store 52 have been reopened, as indicated by fragments of the asphalt surface thrown back into the holes. This is in contrast to RAF Faldingworth where the holes have been left open.
In total there were enough holes to store 66 fissile cores. One source states that the single hole stores contained plutonium cores, while the double-hole stores were, used for cobalt cores. Currently available documentation does not reveal if one fissile core may be equated with one bomb, or if a bomb contained more than one fissile core. Recent research has shown that Britain probably produced no more than twenty Blue Danube warheads, with this number on the active stockpile between 1957 and 1961. It is therefore likely that no more than a handful of weapons were stored at RAF Barnham at anyone time.
The significance of the filling of the holes in the Type 'B' stores is also unclear. It may coincide with the withdrawal of the first generation nuclear weapon, ''Blue Danube'', and the deployment second generation atomic bomb, ''Red Beard'' (from 1961), or it may be related to the introduction of first British hydrogen bomb, ''Yellow Sun'' (from 1958). Given the number of available nuclear warheads in the late 1950’s and early 1960’s, it is unlikely that the RAF Barnham store was ever full. Part of RAF Barnham's function, along with other bomb stores, was to convince the Soviet Union that Britain had more nuclear weapons at her disposal than was in fact the case.
Information sourced from English Heritage.
Modern entry in Google Sketchup made from components uploaded to the Sketchup Library by Crestview Doors.
FIALHO, Arivelto Bustamante. Automatismos hidráulicos: princípios básicos, dimensionamentos de componentes e aplicações práticas. São Paulo: Érica, 2015. 112 p. (Série Eixos: Controle e processos industriais [Érica]). ISBN 9788536513355. Inclui bibliografia e índice; il. tab. quad.; 28x21cm.
Palavras-chave: ENGENHARIA HIDRAULICA; CIRCUITOS HIDRAULICOS.
CDU 621.22 / F438a / 2015
First the image was converted into a set data vectors in format (x,y,r,g,b), one for each pixel in image.
Then this 5D-data was projected to 2D-space using principal component analysis, The resulting image was rebuilt based on that reduced information.
EUROBIKE, 28 August 2014. Lectures on LEV Components within the LEV Components Special Exhibition.
Read the article: extraenergy.org/main.php?language=en&category=&su...
This is a method my friend and I have started using for storing electronics components. We have a bunch of old pill bottles kicking around, so we label them and use them for storage. We've found them most convenient.
EUROBIKE, 28 August 2014. Lectures on LEV Components within the LEV Components Special Exhibition.
Read the article: extraenergy.org/main.php?language=en&category=&su...