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Parallax and Parsecs
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very now and then, I refer to astronomical distances such as Astronomical Units or Parsecs, but I dont think that Ive yet actually had a posting about the meaning of those terms. So, I thought that Id write about these distance measurements today. [url=http://astroprofspage.com/archives/1000]...
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Chalk River Laboratories
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New world-class research technology unveiled at AECL's Chalk River Laboratories Atomic Energy of Canada Limited (AECL) congratulates the National Research Council (NRC) on the official opening of Canada's first neutron reflectometer for the Canadian Neutron Beam Centre (CNBC) located at AE...
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Scientists and interviews
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Just don't quote me There's a fascinating discussion over at Tara's place regarding scientists and their frequent reluctance to answer interview requests from the media. I commented on this already on Aetiology, but the issue is multi-faceted enough that I think it warrants some reworking and ex...
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Unparticle Physics
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Title: Unparticle Physics Author: Howard Georgi I discuss some simple aspects of the low-energy physics of a nontrivial scale invariant sector of an effective field theory - physics that cannot be described in terms of particles. I argue that it is important to take seriously the possibility that...
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Polonium
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Polonium Is The Only Element With Simple Cubic Polonium is the only element with simple cubic crystal structure, and new theoretical work explains why that is. In a solid piece of polonium the atoms sit at the corners of a cubic unit cell and nowhere else. [url=http://www.aip.org/pnu/2007/split...
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Perovskites
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Two non-magnetic materials showing magnetism on their interface: scientists of the University of Twente and Radboud University of Nijmegen show that it is possible, in the coming issue of Nature Materials already online. Publication of this remarkable effect shortly follows previous results...
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New Form of Matter
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Pittsburgh Researchers Create New Form of Matter Physicists at the University of Pittsburgh have demonstrated a new form of matter that melds the characteristics of lasers with those of the world's best electrical conductors. The work introduces a new method of moving energy from one point to ano...
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Three-Planet Orbit
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If a supreme being were so inclined, it could configure three planets so that they would race around one another in a graceful figure-8 orbit. At least that's what Newton's theory of gravity predicts. Now, a team of physicists has shown that the figure-8 orbit is possible even if they use Einstein's m...
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Metallic Magnetism
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Physicists describe a new mechanism for metallic magnetism
Predicting the magnetic behaviour of metallic compounds is a surprisingly difficult problem for theoretical physicists. While the properties of a common refrigerator magnet are not a great mystery, certain materials e...
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Force Law for Granular Impacts
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Penn Physicists Develop Force Law for Granular Impacts: Sand, Other Granular Matter's Behaviour Is Better Defined Sand. A single grain is tiny, but solid, and shares the physical properties of other solid matter. But pack or transport millions of grains together - as modern society does with co...
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Newton's second law of motion
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Newton's second law of motion, that pillar of classical physics, the formula that says the force on an object is proportional to acceleration, has now been tested, and found to be valid, at the level of 5 x 10^-14 m/s^2. This is a thousandfold improvement in precision over the best previous test, one c...
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Chaos Theory
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The hype has subsided and now chaos theory is a ubiquitous part of science. Chaos theory, the study of how tiny fluctuations can have tremendous effects within a moving system, emerged in mainstream physics about 30 years ago. The signa...
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New form of metal crystals
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Appropriating cellulose fibres from cotton and crystallizing them, scientists at Pacific Northwest National Laboratory have grown never-before-seen configurations of metal crystals that show promise as components in biosensors, biological imaging, drug delivery and catalytic converte...
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How Ice Melts:
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How Ice Melts:
A breakthrough new study, supports a leading theory that melting starts when the fundamental structure of matter begins to crack.
Melting is considered a basic phenomenon in physics. An understanding of how it works is crucial to gaining a firm grasp on the physical worl...
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Mercury Atomic Clock
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An experimental atomic clock based on a single mercury atom is now at least five times more precise than the national standard clock based on a “fountain” of caesium atoms, according to a paper by physicists at the Commerce Department’s National Institute of Standards and Technology (NIST) in the J...
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