منابع مشابه
Revolving rivers in sandpiles: from continuous to intermittent flows.
In a previous paper [E. Altshuler, Phys. Rev. Lett. 91, 014501 (2003)], the mechanism of "revolving rivers" for sandpile formation is reported: As a steady stream of dry sand is poured onto a horizontal surface, a pile forms which has a river of sand on one side flowing from the apex of the pile to the edge of the base. For small piles the river is steady, or continuous. For larger piles, it be...
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The revolving door between the government and the private sector has long been presumed to lead to the capture of regulators by industry interests. A growing body of empirical literature, however, either finds no conclusive evidence of a capture effect or finds evidence of an opposite effect that the revolving door indeed results in more aggressive, not less aggressive, regulatory actions. To a...
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IN THIS ISSUE In this issue of Physics & Society, we continue our series on the risks of nuclear weapons after the Cold War. In their article Illicit Trafficking of Weapons-Usable Nuclear Material: Facts and Uncertainties, Lyudmila Zaitseva and Friedrich Steinhausler have provided us with a very detailed look at what is known about the smuggling of fissile materials. They have also provided a r...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2003
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.91.014501