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"Everything should be as simple as it is, but not simpler", Albert Einstein
Browsing All Posts published on »October 24th, 2011«
Universe’s expansion may be understood without dark energy
Least-time paths of light by Arto Annila ABSTRACT The variational principle in its original form á la Maupertuis is used to delineate paths of light through varying energy densities and to associate shifts in frequency and changes in momentum. The gravitational bending and Doppler shift are in this way found as mere manifestations of least-time […]
NASA Telescopes Help Solve Ancient Supernova Mystery
October 24, 2011
A mystery that began nearly 2,000 years ago, when Chinese astronomers witnessed what would turn out to be an exploding star in the sky, has been solved. New infrared observations from NASA’s Spitzer Space Telescope and Wide-field Infrared Survey Explorer, or WISE, reveal how the first supernova ever recorded occurred and how its shattered remains […]
Maxwell’s Demon and Data Compression
October 24, 2011
Akio Hosoya , Koji Maruyama , Yutaka Shikano In an asymmetric Szilard engine model of Maxwell’s demon, we show the equivalence between information theoretical and thermodynamic entropies when the demon erases information optimally. The work gain by the engine can be exactly canceled out by the work necessary to reset demon’s memory after optimal data […]
Mathematical Physics: Problems and Solutions
October 24, 2011
The present issue of the series <Modern Problems in Mathematical Physics> represents the Proceedings of the Students Training Contest Olympiad in Mathematical and Theoretical Physics and includes the statements and the solutions of the problems offered to the participants. The contest Olympiad was held on May 21st-24th, 2010 by Scientific Research Laboratory of Mathematical Physics […]
A new kind of superconductivity
October 24, 2011
Physicists unveil a theory for a new kind of superconductivity In this 100th anniversary year of the discovery of superconductivity, physicists at the University of Massachusetts Amherst and Sweden’s Royal Institute of Technology have published a fully self-consistent theory of the new kind of superconducting behavior, Type 1.5, this month in the journal Physical Review […]
Highlights of the MAGIC Telescopes
October 24, 2011
Juan Cortina for the MAGIC Collaboration The MAGIC two 17 meter diameter Very High Energy (VHE) gamma-ray telescopes have now operated for two years in stereoscopic mode. The performance of the instrument has been evaluated: the integral sensitivity for an energy above 300 GeV is 0.76% crab units (10% Crab units differential sensitivity below 100 […]
October 24, 2011
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