منابع مشابه
Digging in. Rifle-toting researcher fights to protect ancient sites.
George has had more than his share of such Indiana Jones-style adventures. He kept a constant vigil at the Iraqi Museum in Baghdad during the Gulf War, catching a nap in the cellar in between air raids; he organized opposition to the truckloads of armed looters who scoured the countryside in the mid-1990s; and he later survived a brutal assault by an unknown assailant. All the while, George has...
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The aim of this paper is to give a multiplicative asymptotics for the deviation of ergodic averages for certain classes of suspension flows over Vershik’s automorphisms [11, 13]. A corollary of the main result yields limit theorems for these flows. Informally, Vershik’s automorphisms (also sometimes called “adic transformations”) are dynamical systems whose orbits are leaves of the asymptotic f...
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Survey finds biodefense researcher anxiety-over inadvertently violating regulations.
A nationwide survey of biodefense researchers assessed the effectiveness of the select agent regulations (42 CFR §73), which govern the handling, storage, and security of listed biological agents and toxins, in achieving their statutory goals of protecting public health and national security. The survey assessed regulatory components and measured an ‘‘anxiety factor,’’ which indicated that resp...
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ژورنال
عنوان ژورنال: Nature
سال: 1999
ISSN: 0028-0836,1476-4687
DOI: 10.1038/21501