I'll be presenting this work at EHSM: http://ehsm.eu/nnI built an X-ray backscatter imaging system from parts found on eBay. This system wor...
I'll be presenting this work at EHSM: http://ehsm.eu/nnI built an X-ray backscatter imaging system from parts found on eBay. This system works by scanning a very thin beam of X-rays across the target, and measures the amount of backscatter for a given beam position. The beam is scanned mechanically by a rotating chopper (collimator) wheel, and by tilting the rotating wheel on an orthogonal axis. The output image is generated on an oscilloscope by matching the horizontal scan speed to the rotating wheel, and using a potentiometer to measure the vertical axis position. The scope's brightness (z axis) is controlled by the amount of backscatter signal received by a large-area detector. Thus, the image is constructed bit by bit. I used a long-exposure shutter on my camera to see the image formed by the moving oscilloscope trace.nnhttp://www.google.com/patents/US5181234 Less
Backscatter's Sean Boone demonstrates how to set up an underwater compact camera system with an aluminum housing and strobe. This instructio...
Backscatter's Sean Boone demonstrates how to set up an underwater compact camera system with an aluminum housing and strobe. This instructional video includes everything you need to get started with your new underwater compact camera system. For all of your underwater imaging needs, be sure to visit us at www.backscatter.com Less
A tutorial to show a quick way to remove lots of backscatter on your underwater pictures, using Photoshop Elements Magic Masking, and all wi...
A tutorial to show a quick way to remove lots of backscatter on your underwater pictures, using Photoshop Elements Magic Masking, and all without closing down Adobe Lightroom, by Duxy from Scuba Travel. Less
We present Wi-Fi Backscatter, a novel communication system that bridges RF-powered devices with the Internet. Specifically, we show that it ...
We present Wi-Fi Backscatter, a novel communication system that bridges RF-powered devices with the Internet. Specifically, we show that it is possible to reuse existing Wi-Fi infrastructure to provide Internet connectivity to RF-powered devices. We believe that this new capability can pave the way for the rapid deployment and adoption of RF-powered devices and achieve ubiquitous connectivity via nearby mobile devices that are Wi-Fi enabled. Less
Oct. 19: The full-body scanners that have become a routine part of air travel are now being replaced by millimeter wave sca...
Oct. 19: The full-body scanners that have become a routine part of air travel are now being replaced by millimeter wave scanners in some of the nation’s largest airports. NBC’s Tom Costello reports. Less
Hunting and fishing in Alaska are common both for recreation and subsistence. Hunting Alaska is a popular hunting destination. Hunters...
Hunting and fishing in Alaska are common both for recreation and subsistence. Hunting Alaska is a popular hunting destination. Hunters come from all over the world to hunt big game animals... Less
Rc911 and rc333 Grunthal to Winnipeg.
The USAF's Rome Laboratory had the first US success with their AN/FPS-118 OTH-B. A prototype with a 1 MW transmitter and a separate receiver...
The USAF's Rome Laboratory had the first US success with their AN/FPS-118 OTH-B. A prototype with a 1 MW transmitter and a separate receiver was installed in Maine, offering coverage over a 60 degree arc between 900 to 3,300 km. A permanant transmitting facility was then built in Moscow, Maine, a receiving facility in nearby Columbia Falls, and an operational center between them in Bangor. The coverage could be extended with additional receivers, providing for complete coverage over a 180 degree arc (each 60 degree portion known as a "sector"). GE Aerospace was awarded the development contract, expanding the existing east coast system with two additional sectors, while building another three-sector system on the west coast, a two-sector system in Alaska, and a one-sector system facing south. In 1992 the Air Force contracted to extend the coverage 15 degrees clockwise on the southern of the three east coast sectors to be able to cover the southeast US border. Additionally, the range was extended to 3000 miles, crossing the equator. This was operated 40 hours a week at random times. Radar data was fed to the U.S. Customs/Coast Guard C3I Center, Miami; Joint Task Force 4 Operations Center, Key West; U.S. Southern Command Operations Center, Key West; and U.S. Southern Command Operations Center, Panama.rnrnWith the end of the cold war, the influence of the two senators from Maine was not enough to save the operation and the Alaska and southern-facing sites were canceled, the two so-far completed western sectors and the eastern ones were turned off and placed in "warm storage," allowing them to be used again if needed. Less
The MINI Z system is ideal for security and public safety officials for multiple applications. Examples of areas of application include:nnP...
The MINI Z system is ideal for security and public safety officials for multiple applications. Examples of areas of application include:nnPublic Safety: Quick screening of unattended and suspicious bags and packages for potential terrorist threats in public spaces.nnBorder and Security Checkpoints: Inspecting vehicle bumpers, tires, panels, and interiors for explosives, plastic weapons, and other concealed threats and contraband.nnDrug Enforcement: Investigating suspected drug labs for drugs or currency.nnEvent Security: Screening hand baggage and deliveries to ensure public safety.nnVIP Security: Security sweeps of meeting rooms and furniture for organic threats and IEDs to ensure personnel safety.nnMaritime Security: Screening the hulls and bulkheads of suspected drug running boats for contraband or narcotics.nnGeneral Aviation Security: Inspecting the seats, compartments, and panels of small planes for hidden contraband.nnnMINI Z — the World's First Handheld Z Backscatter® Imaging System:nnScans in Places Other Systems Can't Reach: The MINI Z system is a compact, single-sided imager that can be used to scan objects in hard-to-reach areas, such as unattended bags, backpacks, or packages in a subway or bus. Unlike density meters, trace detectors, or portable transmission X-ray systems, the MINI Z system produces an easy-to-interpret image to quickly detect organic threats and contraband behind non-metallic surfaces.nnUnsurpassed detection of organic threats: The MINI Z handheld system uses AS&E's signature Z Backscatter technology, an advanced X-ray imaging technology that produces a real-time image of the scan target, highlighting organic materials that transmission X-ray systems can miss, such as explosives, currency, and drugs.nnAn easy to use, all-in-one imaging system: The MINI Z system is self-contained and does not require set-up, enabling immediate operation. The operator controls the scanning function using a simple, intuitive GUI on the system's dedicated tablet, upon which an image of the scanned target appears in real-time.nnSafe, secure and dependable operation: The MINI Z system is safe for operators, bystanders, and the environment. The system's X-ray dose conforms to the appropriate ANSI, ICRP, NCRP, and EURATOM radiation safety standards. Although the MINI Z is a low-energy and low-dose Z Backscatter system, it is not designed to scan people. The MINI Z system must be used in accordance with the manufacturer's instructions as well as applicable laws and regulations. Less
Smart Laser-Scanner for 3D Human-Machine InterfacenAlvaro Cassinelli, Stephane Perrin, Masatoshi Ishikawa, University of Tokyo, JapannThe pr...
Smart Laser-Scanner for 3D Human-Machine InterfacenAlvaro Cassinelli, Stephane Perrin, Masatoshi Ishikawa, University of Tokyo, JapannThe problem of tracking hands and fingers on natural scenes has received much attention using passive acquisition vision systems and computationally intense image processing. We are currently studying a simple active tracking system using a laser diode, steering mirrors, and a single non-imaging detector, which is capable of acquiring three dimensional coordinates in real time without the need of any image processing at all. Essentially, it is a smart rangefinder scanner that instead of continuously scanning over the full field of view restricts its scanning area, on the basis of a real-time analysis of the backscattered signal, to a very narrow window precisely the size of the target. The complexity of the whole setup is equivalent to that of a portable laser-based barcode reader, making the system compatible with wearable computers. Less
A study that on the surface appears to be independent has claimed that there are no safety concerns regarding radiation firing body scanners...
A study that on the surface appears to be independent has claimed that there are no safety concerns regarding radiation firing body scanners used by the TSA in the nation's airports. However, the research is based purely on old data that was released by the federal agency itself.nnThe LA Times reports today that the study, conducted by assistant professor of biomedical engineering Taly Gilat Schmidt of the Marquette University College of Engineering, has found that the scanners "do not expose passengers to dangerous levels of radiation."nnThe report notes that Schmidt's "new independent analysis" found that "the radiation levels are considerably lower than those of other X-ray procedures such as mammograms."nnSchmidt's findings are due to be published in the Medical Physics journal next month, and will surely be lauded by the TSA, which has sought to fend off constant criticism from concerned scientists and experts who have warned that the radiation from backscatter scanners subjects passengers to an increased risk of cancers.nnHowever, even the LA Times report itself admits that the analysis will likely not allay those concerns because, once again, no independent testing of the body scanners was undertaken.nnAs the report notes, "Schmidt, did not test the actual machines. Instead, she based her conclusions on scanner radiation data released publicly by the TSA."nhttp://www.infowars.com/another-bogus-study-claims-irradiating-tsa-body-scanners-are-safe/nby Steve Watsonnnhttp://www.infowars.com/nhttp://www.prisonplanet.tv/nhttp://twitter.com/#!/RealAlexJonesnhttp://www.facebook.com/AlexanderEmerikJonesn[Check out Alex's New Social Network-'Planet Infowars'nhttp://planet.infowars.com/ Less
Set sail in the British Virgin Islands. The turquoise sea looks good enough to drink, but we bring provisions for a week anyways - enough t...
Set sail in the British Virgin Islands. The turquoise sea looks good enough to drink, but we bring provisions for a week anyways - enough to go island-hopping, shipwreck diving, and cave snorkeling. As night falls in a sea of anchor lights, I find myself surrounded by stars above and below. nnSubscribe for updates, more to come!nAlso check out Kyoto "Rising Dawn"nhttp://www.youtube.com/watch?v=fgDyTK0Rz6wnnAnd see New York "Afterglow"nhttp://www.youtube.com/watch?v=kn-1D5z3-CsnnScenes include Tortola Island, Jost Van Dyke, Virgin Gorda, Sandy Cay, Cooper Island, Trellis Bay, Anegada, the Bitter End Yacht Club, Foxy's Taboo, the Indians, the Baths, snorkeling the caves at Norman Island, and diving the RMS Rhone shipwreck. nnThe BVI are a unique place, almost like an "island city of sailors." At night, it's quite a moment being surrounded by a dozen other boats in what resembles a neighborhood at sea. We lived on a 40-foot sailboat for a week - with just 3 people aboard, we had our hands full raising sails, hauling scuba tanks, cooking, and cleaning! Of course, we did have our share of problems. On our last night, we ran out of fresh water in the tanks as we realized we only filled one of the two tanks - so we bathed in drinking water and drank soda :) On another day, I was in the water and the boat drifted off! Someone onboard performed a "quickstop crew-overboard maneuver" to pick me up. I remember yelling "Turn off the motor!" just in case, so the propeller wouldn't grind me up :) nnAs for filming, the biggest challenge was keeping stuff dry. We fried our new Sony RX100 camera underwater in one of those ziploc-style camera bags :( I shot with the Nikon D800 and the GoPro HD Hero2 (with Dive Housing) for underwater shots. For the GoPro, I occasionally attached the Backscatter Red Flip Magic Filter for white balance correction, and at deeper depths (10ft or greater) the colors came out nicely in my opinion. Underwater visibility in the BVI is so clear, amazing. Lenses include the 24mm f/1.4G Nikkor and 85mm f/1.8G Nikkor. Stabilized with Glidecam HD-2000 and cut in Premiere.nnMusic by Stephen Anderson.nLeave a comment, thanks! Less
I built a large area detector that is sensitive to X-rays and will be used in an upcoming project. The detector is constructed from a "Lanex...
I built a large area detector that is sensitive to X-rays and will be used in an upcoming project. The detector is constructed from a "Lanex Regular" X-ray intensifying screen, and a Hamamatsu R6094 photomultiplier tube (PMT). The PMT amplifies the light from the intensifying screen which is emitted when an X-ray strikes the screen. The area of the screen allows it to catch many X-ray photons created by backscatter. The PMT is setup with a simple 100K resistor between the anode and ground. A 1V output corresponds to a 1 microamp anode current. I'll probably add a very simple opamp circuit to this, and then pipe it into an A/D converted for digitization. Less
Filmed in the Cayman Islands. My setup is a GoPro with a dive housing and a backscatter red filter. The depth this was filmed at is 90ft. Ta...
Filmed in the Cayman Islands. My setup is a GoPro with a dive housing and a backscatter red filter. The depth this was filmed at is 90ft. Tags: "Honda (Business Operation)" "Acceleration (Dimension)" cars Civic New Books paintball awesome sport fun bunkered laning ego geo nt luxe dye dm planet eclipse "Operation (game)" Review Airsoft Soft "Book (School Mascot)" Cool Funny Eagle Desert Potato Cannon Park "Honda Civic" Pilot Odyssey Less
In this talk, I explore a seldom-discussed facet of airport security: what happens after the backscatter/millimeter wave scan or the friendl...
In this talk, I explore a seldom-discussed facet of airport security: what happens after the backscatter/millimeter wave scan or the friendly pat-down? A marginally resourceful and MacGyver-esque individual can breeze through terminal gift shops, restaurants, magazine stands and duty-free shops to find everything they need to wage war on an airplane. We'll take weapons — melee, projectile, and beyond — from concept to prototype in this serious (yet often humorous) talk, replete with photos and video. Less
Here is a video I shot a little while back, using up to 6 GoPro Hero2 HD camera's. The point was to try and compare filters but conditions e...
Here is a video I shot a little while back, using up to 6 GoPro Hero2 HD camera's. The point was to try and compare filters but conditions ended up quite poor and results were not very conclusive at all. Filters used URPro CY dome for GoPro dive and Blurfix URPro CY 55mm thread on Blurfix Backscatter Magic Flip for GoPro Dive Oculus filter for GoPro Dive The main thing found is that the Hero2 has pretty bad auto white balance and doing a filter comparison in less then ideal conditions just didn't work and results are inconclusive here. I dint post this originally as I thought it would just cause more confusion but the results at under 15m where generally ok beyond that in this light and vis all cameras struggled due to WB issues. I did try some more filter tests using protune modes in the newer firmware but WB is still fully auto there and so results are just as random. I intended to test the max depth of each filters effectiveness but the conditions reduced the effective range compared to other dives I have done in better conditions with some of the same filters so results arent all that useful here. The data overlays is accurate for depth but for some reason the air pressure reading is not correct. My computer does give correct air reading on its screen but the recorded data is about as random as the GoPro's AWB and I apparently would have died on some of these dives if you pay close attention. I will be back here in about a month and will shoot some video with my hero3 ... Less
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