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Neue Rekorde mit “Schrauben aus Licht” aufgestellt

By Guest PostDecember 24, 2016Scienceanton zeilinger, forschungswelt, laser, mario krenn, photonen, quantenzahl, robert fickler, schrauben aus licht

Dem Forscherteam um Anton Zeilinger ist es gelungen, zwei neue Rekorde beim Experimentieren mit verdrehten Lichtteilchen aufzustellen. Zum einen konnten sie zeigen, dass die Verdrehung von Licht selbst über eine Distanz von 143 Kilometer aufrechterhalten bleibt, was zukünftige Datenübertragung revolutionieren könnte. Andererseits haben sie es in Zusammenarbeit mit australischen Wissenschaftern geschafft, einzelne Lichtquanten stärker zu verdrehen als je zuvor und diese zudem mit einem zweiten Teilchen zu verschränken. Auch diese Ergebnisse, veröffentlicht im renommierten Fachmagazin PNAS, weisen auf in Zukunft mögliche vergrößerte Speichermöglichkeiten auf einzelnen Lichtquanten hin. (more…)

International Space Station to Beam Video via Laser Back to Earth

By Guest PostApril 14, 2014Scienceclues, david palmer, earth, gehirn, golden spikes, international space station, jerome lettvin, laser, mars, matthias bethge, maya clay, netzhaut, radio frequency, rgcs, robotic arm, sheryl luzzadder beach, tim beach

A team of about 20 working at NASA’s Jet Propulsion Laboratory in Pasadena, Calif., through the lab’s Phaeton early-career-hire program, led the development of the Optical Payload for Lasercomm Science (OPALS) investigation, which is preparing for an April 14 launch to the International Space Station aboard the SpaceX-3 mission. The goal? NASA’s first optical communication experiment on the orbital laboratory.

Scientific instruments used in space missions increasingly require higher communication rates to transmit gathered data back to Earth or to support high-data-rate applications, like high-definition video streams. Optical communications-also referred to as “lasercom”-is an emerging technology where data is sent via laser beams. This offers the promise of much higher data rates than what is achievable with current radio frequency (RF) transmissions and has the advantage that it operates in a frequency band that is currently unregulated by the Federal Communications Commission. (more…)

Crossing Your Arms Relieves Pain

By Guest PostJune 8, 2011Healthbrain, centre of the body, clinical therapies, crossed hands, eeg, electroencephalography, external space, giandomenico iannetti, hand, intensity of pain, laser, neuroscience, pain, painful stimulus, phenomenon, sensory stimuli, ucl

Crossing your arms reduces the intensity of pain you feel when receiving a painful stimulus on the hand, according to research by scientists at UCL.

Published in the current issue of the journal PAIN, the research shows that crossing your arms over the midline (an imaginary line running vertically down the centre of the body) confuses the brain and reduces the intensity of the pain sensation. (more…)

Study Shows Wind Turbines on Farmlands May Benefit Crops

By Guest PostDecember 19, 20101 commentEnvironmentatmosphere, carbon dioxide, corn, crop, crops, domestic source of energy, earth surface, electricity, fungal infestations, gene takle, generate, laser, lidar, midwestern farm, moisture levels, photosynthesis, renewable energy, research, soybean, takle, turbine blades, wind turbines

Wind turbines in Midwestern farm fields may be doing more than churning out electricity. The giant turbine blades that generate renewable energy might also help corn and soybean crops stay cooler and drier, help them fend off fungal infestations and improve their ability to extract growth-enhancing carbon dioxide from the air and soil.

The preliminary findings of a months-long study that examines how wind turbines on farmlands interact with surrounding crops were presented on December 16 at the annual fall meeting of the American Geophysical Union in San Francisco. The presentation was made by researcher Gene Takle of the U.S. Department of Energy’s Ames Laboratory and Julie Lundquist, assistant professor in the University of Colorado at Boulder’s atmospheric and oceanic studies department. (more…)

Tag Archives: laser

Neue Rekorde mit “Schrauben aus Licht” aufgestellt

International Space Station to Beam Video via Laser Back to Earth

Crossing Your Arms Relieves Pain

Study Shows Wind Turbines on Farmlands May Benefit Crops