Physics

NASA JSC, Univ of Texas at Arlington Team to Enhance Environmental, Health & Safety Training

NASA Johnson Space Center and The University of Texas Arlington's Division for Enterprise Development are partnering to develop best practices for enhancing environmental, health and safety training in support of current and future missions and initiatives.

NASA Statement on Space Technology Meetings in Europe

The following is a statement from NASA's associate administrator for space technology, Michael Gazarik, about his meetings this week in Europe to discuss potential cooperation on development of space technologies that will enable NASA's future missions. These include the asteroid initiative announced in the president's fiscal year 2014 budget proposal.

Atomic-scale investigations solve key puzzle of LED efficiency

From the high-resolution glow of flat screen televisions to light bulbs that last for years, light-emitting diodes (LEDs) continue to transform technology. The celebrated efficiency and versatility of LEDs -- and other solid-state technologies including laser diodes and solar photovoltaics -- make them increasingly popular. Their full potential, however, remains untapped, in part because the semiconductor alloys that make these devices work continue to puzzle scientists.

Twin Stars Are Closer to Earth Than Thought

Imagine if you could see a car’s headlights from more than 20 miles away. Those must be some headlights! It might even throw your whole understanding of headlights into question – how could there be any this bright? But then, you realize that the car wasn’t 20 miles away, but just 2; instantly, things make sense again.

This is how scientists solved an astronomical mystery involving not headlights, but a double star system named SS Cygni. It’s a kind of system known as a dwarf nova, which

Biophysicists measure mechanism that determines fate of living cells

For the first time, biophysicists have measured the molecular force required to mechanically transmit function-regulating signals within a cell. A new laboratory method, named the tension gauge tether approach, has made it possible to detect and measure the mechanics of the single-molecule interaction by which human cell receptors are activated.

A quantum simulator for magnetic materials

Physicists have developed a quantum simulator that allows arranging atoms in a way that they mimic the behavior of electrons in magnetic materials. The experiment opens up the possibility of systematically studying poorly understood properties of novel materials. The fresh insights might lead to designs for new magnetic materials.

Gold nanocrystal vibration captured on billion-frames-per-second film

A billon-frames-per-second film has captured the vibrations of gold nanocrystals in stunning detail for the first time.

Error sought & found: State-of-the-art measurement technique optimised

A systematic error has been eliminated from a measurement technique for analysing the physical properties of the Earth's atmosphere using signals from GPS satellites – thanks to an Austrian Science Fund FWF project. As part of this project, the radio occultation technique, which is based on phase shifts in GPS signals, was systematically tested for error sources. A significant error was found through a day-night comparison of measurement data recorded over a ten-year period. The findings have now been published along with a correction proposal.

Engineers pioneer flat spray-on optical lens

A University of British Columbia engineer and a team of U.S. researchers have made a breakthrough utilizing spray-on technology that could revolutionize the way optical lenses are made and used.

Stitching defects into world’s thinnest semiconductor

Researchers have grown high-quality crystals of molybdenum disulfide, the world's thinnest semiconductor, and studied how these crystals stitch together at the atomic scale to form continuous sheets, gaining key insights into the optical and electronic properties of this new "wonder" material.

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