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Contents contributed and discussions participated by Lionel Jacques

Lionel Jacques

Cubesat to run applications - 0 views

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    the ArduSat (Arduino - satellite) will be the first open platform allowing the general public to design and run their own space-based applications, games and experiments, steer the onboard cameras to take pictures on-demand, and even broadcast personalized messages back to Earth.
Lionel Jacques

Joggobot turns a quadrocopter into a running companion - 3 views

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    Joggobot turns a quadrocopter into a running companion Researchers from RMIT in Melbourne, Australia have developed a flying running companion called Joggobot. The system uses the built-in camera on a commercially-available Parrot AR Drone quadrocopter to track the position of a jogger, and fly a few feet out in front.
Lionel Jacques

MIT researchers create robotic elephant trunk - 2 views

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    MIT researchers create robotic elephant trunk Regular readers might remember the robotic universal gripper that can pick up a wide variety of objects thanks to an elastic membrane filled with coffee grounds.
Lionel Jacques

IBM looking to put lithium-air batteries on the road - 0 views

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    f existing lithium-ion batteries were scaled up to match the range capacity of gas-powered vehicles, they would be unfeasibly large and heavy. Lithium-air batteries, which have the potential to provide energy densities that rivals traditional gasoline-powered engines, are seen as a possible solution.
Lionel Jacques

Hubble to Watch Historic Venus Transit, Using Moon as Mirror - 2 views

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    "Scientists are planning to use NASA's Hubble Space Telescope to observe next month's historic transit of Venus across the sun's face. But there's a twist.
    Researchers can't point Hubble anywhere near the sun, because our star's bright light could damage the telescope's super-sensitive instruments. So Hubble will watch the June 5-6 Venus transit by using the moon as a mirror."
Lionel Jacques

Quirky solar cell sets new efficiency record - physicsworld.com - 1 views

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    Researchers in the US have built a new type of solar cell that emits light as well as absorbs it, making it the most efficient solar cell ever developed. The efficiency of their prototype cell allows it to convert 28.6% of the Sun's energy into electricity.
Lionel Jacques

Cosmic-ray theory gets the cold shoulder - 0 views

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    "One of the leading theories describing how the most energetic cosmic rays are produced may need a rethink in light of a new study by physicists at the IceCube Neutrino Observatory in Antarctica. The team had set out to detect the extremely energetic neutrinos that are expected to be produced alongside high-energy cosmic rays in the violent explosions that mark the deaths of massive stars - but after looking at hundreds of these explosions, no such neutrinos have been found. "
Lionel Jacques

Exotic explanation for Pioneer anomaly ruled out - 1 views

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    "Given that for both craft electricity is supplied by a radioisotope thermoelectric generator (RTGs) powered by the heat given off by the radioactive decay of plutonium - an energy source that decays exponentially with time - Turyshev and others suggested that the extra acceleration could be caused by thermal radiation being emitted from the craft in a preferred direction. "
Lionel Jacques

NASA investigates sending CubeSats to Phobos and back - 3 views

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    NASA's Innovative Advanced Concepts Program provides funding to study a small number of highly advanced spaceflight concepts, with the goal of understanding the technological possibilities which will guide the development of future space missions. Under this program, a JPL (Jet Propulsion Laboratory) researcher has proposed the use of a pair of CubeSats for an autonomous mission to retrieve samples from Phobos, Mars' larger moon.
Lionel Jacques

Laser-wielding satellite swarm to deflect asteroids - 2 views

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    "The latest idea comes from engineers at Glasgow's University of Strathclyde who suggest that a swarm of laser-wielding satellites could nudge Earth-bound asteroids off their collision course.... One proposed deflection technique involves using lasers to pulverize the surface of the asteroid, ejecting tiny bits of rock that would act as a propellant and push it onto a different course."
Lionel Jacques

MIT researchers create camera that can see around corners - 1 views

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    "It works by emitting a burst of light from a femtosecond laser that reflects off visible surfaces - such as an opaque wall - onto objects that are hidden from the camera's direct view. The light then bounces off the object before ultimately making its way back to a detector. This process is repeated a number of times with the laser targeted at different areas of the reflecting surface."

    nice video
Lionel Jacques

Prolonged Space Travel Causes Brain and Eye Abnormalities in Astronauts | SpaceRef - Yo... - 1 views

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    "Magnetic resonance imaging (MRI) of the eyes and brains of 27 astronauts who have spent prolonged periods of time in space revealed optical abnormalities similar to those that can occur in intracranial hypertension of unknown cause, a potentially serious condition in which pressure builds within the skull."
Lionel Jacques

LED converts heat into light - 0 views

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    "A light-emitting diode (LED) that emits more light energy than it consumes in electrical energy has been unveiled by researchers in the US. The device - which has a conventional efficiency of greater than 200% - behaves as a kind of optical heat pump that converts lattice vibrations into infrared photons, cooling its surroundings in the process."
Lionel Jacques

Solar energy-harvesting "nanotrees" could produce hydrogen fuel on a mass scale - 1 views

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    "... they are looking to use the nanotree structure to mimic photosynthesis in a device that not only harnesses the power of the sun to produce hydrogen fuel, but also captures CO2 from the atmosphere to reduce carbon emissions at the same time."
Lionel Jacques

Scale of the Universe: from 10^-35 to 10^27m - 1 views

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    Nice animation...
Lionel Jacques

Solvay has successfully commissioned the largest PEM fuel cell in the world at SolVin's... - 0 views

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    Solvay announced today it has successfully commissioned its 1 MegaWatt (MW) industrial demonstration Fuel Cell at the SolVin plant in Lillo, Antwerp, Belgium. This Proton Exchange Membrane (PEM) Fuel Cell converts coproduced hydrogen (H2) in the plant into electricity and is now producing for weeks at a steady rate. The Fuel Cell has generated over 500 MWh in about 800 hours of operation, which amounts to the electricity consumption of 1370 families during the same time frame.
Lionel Jacques

NASA studying solar-electric propulsion for "space tugboat" - 0 views

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    NASA announced it was seeking proposals for mission concept studies of a high-power solar electric propulsion (SEP) system that could be used in a "space tugboat." Such a ship would be used ferry payloads in low Earth orbit (LEO) into higher energy orbits,
Lionel Jacques

IBM researchers make 12-atom magnetic memory bit - 0 views

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    Researchers have successfully stored a single data bit in only 12 atoms.
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