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No tots estan quiets...hi ha gent que es mou, i que es planta al mig de la Plaça Sant Jaume, el centre de poder de Barcelona i Catalunya, a expresar el que pensa.
The end of the day seems like a great time to take the metal detector out.
View my portfolio at www.eclecticair.com.
all opened up to complete the installation while the accélérator is being fixed because of the "incident"
You voted, and winning by more than twice the votes, this month's Corps Top Shot comes from Cpl. Alfred V. Lopez. Lopez is currently deployed with Regimental Combat Team 5.
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Cpl. Sean Grady, a dog handler and pointman with Echo Company, 1st Light Armored Reconnaissance Battalion, and Ace, an improvised explosive device detection dog, pause for a break while sweeping a chokepoint during a patrol here, April 27, 2012. Grady, a 27-year-old native of Otho, Iowa, and Ace have successfully located 16 IEDs, the most of any team in their battalion, since arriving in southern Helmand in October 2011.
(U.S. Marine Corps photo by Cpl. Alfred V. Lopez)
The question of mass has been especially puzzling, and has left the Higgs boson as the single missing piece of the Standard Model. The Standard Model has three of four of nature's forces: electromagnetism and the strong and weak nuclear forces. Electromagnetism has been fairly well understood for many decades. Recently, physicists have learned much more about the strong force, which binds the elements of atomic nuclei together, and the weak force, which governs radioactivity and hydrogen fusion.
Electromagnetism describes how particles interact with photons, tiny packets of electromagnetic radiation. In a similar way, the weak force describes how two other entities, the W and Z particles, interact with electrons, quarks, neutrinos and others. There is one very important difference between these two interactions: photons have no mass, while the masses of W and Z are huge. In fact, they are some of the most massive particles known.
The first inclination is to assume that W and Z simply exist and interact with other elemental particles. But for mathematical reasons, the giant masses of W and Z raise inconsistencies in the Standard Model. the Higgs boson.
Commer/Dodge FC/PA/PB/Spacevan (1960-82) Engine 1724cc S4 OHV
Registration Number CNJ 423 T
COMMER SET
www.flickr.com/photos/45676495@N05/sets/72157623652553073...
This van is a Televison Detector Van.
The Commer FC which was introduced in 1960 with many body styles, including a 1500 cc van. After engine and interior upgrades it was renamed the PB in 1967 and the SpaceVan in 1974. It was also sold as a Dodge and Fargo
The 1500cc engine was replaced by the 1725cc Rootes group engine mated to a four speed transmission.
One of the largest fleet users were the GPO.
Reportedly, one condition of the government bailout of Chrysler's British operations in 1976 was a commitment to upgrade the Spacevan, which was praised for its brakes, cornering, and price, but criticized for its power, comforts, and top speed. A revised Spacevan was thus introduced in 1977, using the same mechanics but with numerous cosmetic changes, conveniences, and a new interior. The last Spacevan was built in 1983.
UHF TELEVISION DETECTOR VAN
The equipment is installed in this modified 2500 Series Commer genral service vehicle. Eleven of these were made bringing the compliment of detection vehicles to two for each Telecom Region
A dummy roof houses the aerial movement mechanism. To prevent water entering the dummy roof and effecting the mechanism, the slot necessary to allow fore and aft movement of the front aerial is closed by a heavy duty zip fastened neoprene cover. Two sliders are used one mouted on the front of the aerial the other on the rear. The cover is thus opened in front of the aerial and closed behind it, as the aerial moves. A purpose built console in the body of the vehicle provides the operating position. Extra seats are provided for passengers during demonstrations.
The inside amd the roof of the vehicle is lined with washable plastic to reduce condensation. Hot air from an additional heater is ducted to the side windows to prevent misting and to the dummy roof to prevent seizure which would occur if moisture formed through condensation were allowed to freeze in low tempratures. The vehicle is fitted with Automatic transmission.in order to give smooth take off and slow speeds during detection runs.
Aerial Movement
Two separate movements are required. When the vehicle is not on a detection run the aerials are parked in line along the centre of the roof. Prior to operation it is therefore necessary to rotate them to face either the near or offside of the vehicle. Normally detection is arranged to take on the nearside, but in one way streets it may prove necessary to work both sides. The rotation of the aerials is is carried out by two cam-and-microswitch controlled D.C. shunt wound motors via worm and wheel gears to ensure that the aerials are locked in position when the power is disconnected from the motors.
The second movement is a linnear movement of the front aerial which is necessary to obtain the constant spacing of 6u between the two aerials. The front aerial is mounted on a light trolley which moves on wheels on two Z section rails. The trolley is fastened to an endless toothed belt driven by a third DC. shunt wound motor
CONTROL CIRCUITS
The positioning of the front aerial is controlled by a DC servo system. The UHF tuner shaft is coupled directly to one poteniometer and via a shaped cam to second potentiometer, which provides a correction voltage to convert from the straight-line frequency law of the tuner capacitor to the straight-line wavelength law required for the linear movement of the aerial. A third potentiometer is coupledf to the main motor gear-box to provide an error voltage. The three voltages are combined in a differential amplifier with a reference voltage from a Zener diode. The differential output is fed via two Schmitt-trigger circuits, which are included to prevent hunting, to switch a high power transistor bridge. This controls the power fed to the DC motor, to drive the aerial.
OPERATORS CONTROLS AND DISPLAY
The operators controls are mounted on a display panel on a console. To connect power to the detector, the vehicle ignition must be swithed on and the aerial position swith must be at PARK. In this position the main on off switch in the ON position connects power to the equipment. When the switch is set to OFF,power is not disconnected from the servo ststem until the aerials return to the parked position. In case an emergency such as fire, an EMERGENCY OFF position on the switch is used to disconnect all of the power from the equipment. Pilot lamps and an aerial position indicator are provided to let the operator see at a glance the position of the aerials
The panoramic receiver has three controls, frequency setting with associated digital logging displa, gain and sweep width. Brilliance focus and beam shift controls are provided for the cathode ray tubes, and an aerial control switch is fitted to select the main or either of the auxilary sensing aerials.
POWER
Power is provided by two heavy duty 6 volt batteriesin series. The batteries also provide for the normal electrical system of the vehicle and are charged by the vehicle alternator. A 230 volt 50 Hz supply obtained from the solid state invertor is used to power the panoramic receiver and the power unit for the cathode ray tube displays. Low voltage supplies for the transistor circuits are obtained from the display power pack.
CONCLUSION
A new system of Television detection has been designed, and a working prototype produced by the Post Office Regulatory Division. The production models are being manufactured by a contractor . The equipment is of a modular construction to facilitatefault finding and reduce out of service time by the replacement of faulty modules by spares. It is expected the new transistor receivers will have lower fault liability than the old thermionic v\lve receivers.
The new detection equipment enables an accurate location of the VHF and UHF telvision receivers to be made in the presence of reflections, and sensitivity allows for the low levels of radiation from modern transistor tuners.
Shot at Tatton Park, Manchester, Classic Car Show 18:08:2012 REF 88-84.
The approaching dawn bruises the sky above the RAF boneyard at Long Marston airfield. This is an English Electric Canberra light bomber, disappearing under a coating of moss and mold.
Night, 2 minute exposure. Full moon (though there was no moonlight filtering through the clouds), strong sodium vapor light, natural flashlight.
Reprocessed and replaced, June 2023.
Colorized scanning electron microscope image of nano metal organic frameworks stirred with polyethyelene glycol methyl ether methacrylate for 3 hours at 70 C. (the sample prepared by Safaa Al-Rehili)
Courtesy of Ms. Ohoud Alharbi , King Abdullah University of Science and Technology KAUST
Image Details
Instrument used: Magellan
Magnification: 10,000x
Voltage: 3 kV
Spot: 2.0
Working Distance: 2.2 mm
Detector: TLD
Cmdr Matt Ronson to Echo Base. I think I saw a meteor on vector 19-80, I'm going to go check it out.
This video shows a rather fun little device that can be called an Alpha Spark Detector. I found out about it from Carl Willis and built one of my own a few years ago. And couldn't get it to work.
I drug it out from a dusty corner and worked on it last week. And it sort of worked. And then stopped working. So I rebuilt it. And it sort of worked. So I changed the design. And it sort of worked. And rebuilt it again. Ditto. And finally now.
For such a simple thing there are lots of pitfalls. Dielectric proximity to the spark area causes misfires. Dust, ditto. Electrode wear. As I mentioned in the video reversing the potential stops all function. Huh?
Tips for other builders:
1) Use heavy construction or else the wires will distort the fixture. then your earlier wires will sag as you put in the later wires.
2) 150pF or so is good for the spark visibility. Larger will start to damage the wires. I am using 1Mohm in series with my power supply with the 150pF shunting the two electrodes.
3) Tungsten wire sounds like it might be a good idea to deal with spark erosion. Don't have a clue how to pull it into straight lines and make it stay.
4) The smaller the wire the better it works. I'm guessing that corona ionization from the thinner wires is important.
Cheers.
Thanks for stopping by and view this photo. The reason for posting this photo on Flickr is to learn so if you have constructive feedback regarding what I could do better and / or what should I try, drop me a note I would love to hear your input.
View on Black the way it should be seen!
-- Let the sound of the shutter always guide you to new ventures.
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From the creepy department at Bed Bath & Beyond! Shine this little black light on bed bugs, and they'll suddenly think they're at a 70's disco roller skating rink!
The Solenoidal Tracker at RHIC (STAR) is a detector which specializes in tracking the thousands of particles produced by each ion collision at RHIC. Weighing 1,200 tons and as large as a house, STAR is a massive detector. It is used to search for signatures of the form of matter that RHIC was designed to create: the quark-gluon plasma. It is also used to investigate the behavior of matter at high energy densities by making measurements over a large area.
Since the 1950's when sinister grey vans patrolling the streets could pinpoint an illicit television at your address, where you were watching it and what your were watching .. Today things are MUCH more sophisticated !!!
We're going to detect all those pirate transmissions. Then we're gonna give them their own radio show.
We should be under a severe thunderstorm warning by now.
If it is ever issued, it will be far too late to be effective here.
It is getting darker by the minute & this one has similar timing as the last one this past Tuesday.
Hope it will do a spilt over Lake St.Clair as they have in the past. You learn to become quite a good weather observer living here. www.youtube.com/watch?v=bye78kWwzJs&ab_channel=Instan...
Detector is the Moscow based underground band that plays wild and loud rock music. Logo was chosen for the LogoLounge 6.
If they ever build a railroad on the Moon, this is what the power will look like. It's a detector car, but whatever it was supposed to detect, it had to sneak up on, ti's that weird looking. Leave it to the UP in the '70's to have a track inspection car look this cool.
I now have a 3 day streak of having a detector catch something wrong on NBSR 120, and every on of those has happened at Welsford. Fortunately, those long delays have allowed for some unique locations to become available. Here 6407 leads 120 around 1 of the many curves along the road in Grand Bay - Westfield next to a beautiful oak tree.