منابع مشابه
Auroral Observations at the Alaska Agricultural
Description of stations.--The two points of observation used for the auroral work are located a little over fourteen miles apart. One, designated as Station 1, is on the college campus: The other, Station 2, is on the Richardson Highway in a southeasterly direction from Station 1. The choice of an outlying station is limited as transportation must be reasonably easy. There are only two possible...
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Résumé. Nous présentons dans le présent document une vue d’ensemble du projet de détermination directe de la constante de von Klitzing RK, en cours de réalisation au Bureau International de Poids et Mesures (BIPM). Cette détermination est effectuée dans le contexte général de la révision du Système International d’unités qui sera effective à partir de 2018. L’objectif visé est de mesurer avec u...
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Next we turn to the case of a real vector bundle W −→ Y over a compact manifold Y and define the space of conormal distributions on the total space W of the vector bundle with respect to (i.e. only singular at) the zero section 0W . The latter is a compact embedded submanifold canonically isomorphic to Y. Before I do this, I want to point out some further properties in the case of the conormal ...
متن کاملThe Horvitz-Thompson Estimator
The Horvitz-Thompson estimator is a general estimator for a population total, which can be used for any probability sampling plan. This includes both sampling with and without replacement. • Let π i be the probability that the i th unit of the population is included in the sample (inclusion probability). • On each unit i, we measure a response y i , and typically seek to estimate: τ = N i=1 y i...
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To determine whether methicillin-resistant Staphylococcus aureus (MRSA) USA300 commonly caused infections among Alaska Natives, we examined clinical MRSA isolates from the Alaska Native Medical Center, Anchorage, during 2000–2006. Among Anchorage-region residents, USA300 was a minor constituent among MRSA isolates in 2000–2003 (11/68, 16%); by 2006, USA300 was the exclusive genotype identifi ed...
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ژورنال
عنوان ژورنال: American Journal of Science
سال: 1909
ISSN: 0002-9599
DOI: 10.2475/ajs.s4-28.168.520