Physics

White dwarf star throws light on possible variability of a constant of Nature

An international team led by the University of New South Wales has studied a distant star where gravity is more than 30,000 times greater than on Earth to test its controversial theory that one of the constants of Nature is not a constant.

Identifying the meaning of words with multiple meanings, without using their semantic context

Two Brazilian physicists have devised a method to automatically elucidate the meaning of words with several senses, based solely on their patterns of connectivity with nearby words in a given sentence – and not on semantics. Thiago Silva and Diego Amancio from the University of São Paulo, Brazil, reveal, in a paper about to be published in the European Physical Journal B, how they modelled classics texts as complex networks in order to derive their meaning.

Fermi team releases catalog of gamma-ray sources at energies above 10 GeV

(Phys.org) —The team of scientists associated with the Fermi Gamma-ray Space Telescope mission has published a catalog of gamma-ray sources at energies above 10 GeV. In their paper uploaded to the preprint server arXiv, they outline the various sources of gamma-ray emissions above 10 GeV detected by the Large Area Telescope (LAT) currently orbiting the Earth.

Underwater survival story presents physics puzzle

(Phys.org) —When Lawrence Livermore National Laboratory physicist Maxim Umansky flipped through the news, a startling underwater survival story caught his attention. In May, a boat cook survived a 60-hour underwater ordeal 100 feet below the surface after his tugboat sank near the Nigerian coast.

Device physics: Simulating electronic smog

A research team from A*STAR and Samsung Electronics has developed a fast and accurate way to estimate the electromagnetic emissions from printed circuit boards that could help designers to ensure that devices meet regulatory standards.

New method to generate Laughlin states with atomic systems

In 1998, the Nobel Prize in Physics was conferred to the discovery of a new type of quantum fluid with fractional charge excitations, known as Laughlin state. The production of this quantum state, which explains the behaviour of electrons in two-dimensional metallic plaques when they are exposed to intense magnetic fields, has been one of the most popular research topics on ultracold and Bose-Einstein condensed atoms for one decade.

New method to generate Laughlin states with atomic systems

In 1998, the Nobel Prize in Physics was conferred to the discovery of a new type of quantum fluid with fractional charge excitations, known as Laughlin state. The production of this quantum state, which explains the behaviour of electrons in two-dimensional metallic plaques when they are exposed to intense magnetic fields, has been one of the most popular research topics on ultracold and Bose-Einstein condensed atoms for one decade.

OU physicists develop rationale for the next-generation particle collider

A University of Oklahoma-developed theory provides the rationale for the next-generation particle accelerator—the International Linear Collider. The discovery of the Higgs boson at the CERN Large Hadron Collider in Geneva Switzerland this past year prompted particle physicists to look ahead to the development of the ILC, an electron-positron collider designed to measure in detail all the properties of the newly discovered Higgs particle.

NASA Selects Electrical Systems Engineering Services Contract

NASA has awarded a contract to ASRC Federal Space & Defense (AS&D) of Greenbelt, Md., for the Electrical Systems Engineering Services II (ESES II) for the agency's Goddard Space Flight Center.

Long-Running NASA/CNES Ocean Satellite Takes Final Bow

The curtain has come down on a superstar of the satellite oceanography world that played the "Great Blue Way" of the world's ocean for 11 1/2 years.

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