Physics

Meet An Astronaut: Public Invited to NASA Langley Open House

NASA Langley Research Center is holding an Open House event to celebrate its 95th anniversary on Saturday, September 22, from 10 a.m. to 4 p.m.

Soyuz Landing Coverage Planned for NASA Television

Soyuz Landing Coverage Planned for NASA Television

NASA Orbiter Observations Point to 'Dry Ice' Snowfall on Mars

NASA's Mars Reconnaissance Orbiter (MRO) data have given scientists the clearest evidence yet of carbon dioxide snowfalls on Mars.

NASA and German Aerospace Center Sign Civil Aviation Agreements

NASA and the German Aerospace Center (DLR) have signed two cooperative agreements to advance air traffic management benefiting airline passengers and citizens of both nations.

NASA Highlights 50th Anniversary of Kennedy 'Moon Speech' and Looks Ahead

NASA is offering a variety of special features to commemorate the 50th anniversary of President Kennedy's address at Rice University in Houston on Sept. 12, 1962.

Light-based computers? First all-optical nanowire switch

Computers may be getting faster every year, but those advances in computer speed could be dwarfed if their 1s and 0s were represented by light, instead of electricity. Researchers have made an important advance in this frontier of photonics, fashioning the first all-optical photonic switch out of cadmium sulfide nanowires. Moreover, they combined these photonic switches into a logic gate, a fundamental component of computer chips that process information.

Prototype represents a step toward enhanced soft-tissue tomography

A promising approach for producing medical images with enhanced soft tissue visibility—grating-based x-ray phase contrast—has now advanced from bench-top studies to implementation in an in vivo preclinical computed tomography scanner. A German, Swedish, and Belgian team led by scientists at the Technische Universitaet Muenchen (TUM) published the first experimental results demonstrating the practical potential of this technology, which can significantly improve the contrast in CT scans.

Optical microscopy enters a new phase: 3D measurement through tomographic bright field imaging

(Phys.org)—A widely-used tool for studying cellular structure – indeed, a technique in use throughout biology – phase contrast microscopy converts optical phase shifts to changes in brightness. At the same time, several issues in phase contrast microscopy – including reliance on custom instrumentation, the considerable costs of phase contrast condensers and objective lenses, complex analytics, and disruptive sample perturbations – have constrained its application to studying cellular refractive index and dry mass density.

Higgs boson: landmark announcement clears key hurdle

The announcement two months ago that physicists have discovered a particle consistent with the famous Higgs boson cleared a formal hurdle on Monday with publication in a peer-reviewed journal.

Landmark papers on the Higgs boson published

Physics Letters B, Elsevier's flagship journal in high energy physics, announced today that the observations of the long-sought Higgs particle, hailed as one of the greatest scientific discoveries of all time, have been published.

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