منابع مشابه
5 NP Sep Oct
an instructor in the school’s Division of General Medical Disciplines and a physicianinvestigator at VA Palo Alto Health Care System, did the most comprehensive meta-analysis to date of existing studies comparing organic and conventional foods. They did not find strong evidence that organic foods are more nutritious or carry fewer health risks than conventional alternatives, though consumption ...
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We construct demographic models of retirement and death in office of U.S. Supreme Court justices, a group that has gained demographic notice, evaded demographic analysis, and is said to diverge from expected retirement patterns. Models build on prior multistate labor force status studies, and data permit an unusually clear distinction between voluntary and "induced" retirement. Using data on ev...
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In a pioneering classic, Warren McCulloch and Walter Pitts proposed a model of the central nervous system. Motivated by EEG recordings of normal brain activity, Chvátal and Goldsmith asked whether these dynamical systems can be engineered to produce trajectories that are irregular, disorderly, and apparently unpredictable. We show that they cannot build weak pseudorandom functions.
متن کاملPitts--a proposed new unit.
Dear Sir: I propose the establishment of a new intermediate unit of frequency-pitts. The pitts equals "pulses per second," "nerve pulses per second," or "spikes per second," all relatively clumsy terms used indeterminantly by neurophysiologists, brain research workers, and others. The proposed new unit honors the late Walter Pitts, colleague of the late Warren McCul-loch. Pitts and McCulloch, t...
متن کاملDoes Retirement Kill You? Evidence from Early Retirement Windows
Does Retirement Kill You? Evidence from Early Retirement Windows The magnitude of the effect that health has on the retirement decision has long been studied. We examine the reverse relationship, whether or not retirement has a direct impact on laterlife health. In order to identify the causal relationship, we use unexpected early retirement window offers to instrument for retirement behavior. ...
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ژورنال
عنوان ژورنال: The English Historical Review
سال: 1906
ISSN: 0013-8266,1477-4534
DOI: 10.1093/ehr/xxi.lxxxi.119