منابع مشابه
Profile of James M. Berger.
Whether he is restoring his 1976 Triumph TR6 British roadster or analyzing proteins, James Berger is curious about how machines work and what fuels them. Berger, a professor in the Department of Biophysics and Biophysical Chemistry at Johns Hopkins University School of Medicine, primarily studies biological nanomachines, which are fueled by the cellular energy currency ATP and carry out coordin...
متن کاملDemographic Structure and the James M . Poterba
This article examines the relationship between demographic structure and the level of government spending on K–12 education. Panel data for the states of the United States over the 1960–1990 period suggests that an increase in the fraction of elderly residents in a jurisdiction is associated with a significant reduction in per-child educational spending. This reduction is particularly large whe...
متن کاملEmbedding Projective Spaces by M. Mahowald and R. James Milgram
1. Haefliger reduced the question of embedding manifolds in the Euclidian space R to a homotopy problem in [ö]. Since then it has been of some interest to find examples of ^-manifolds which embed in R~ for a given k. In particular great effort has been spent studying embeddings of the various projective spaces. However, the k that were thus obtained were in no cases larger than 5 or 6 (see for ...
متن کاملM ar 1 99 6 Sinh - Gordon , Cosh - Gordon and Liouville Equations for Strings and Multi - Strings in Constant Curvature
We find that the fundamental quadratic form of classical string propagation in 2 + 1 dimensional constant curvature spacetimes solves the Sinh-Gordon equation, the Cosh-Gordon equation or the Liouville equation. We show that in both de Sitter and anti de Sitter spacetimes (as well as in the 2 + 1 black hole anti de Sitter spacetime), all three equations must be included to cover the generic str...
متن کاملJames
a chair, he was the very picture of dejection. His small head was hanging, an obstreperous tuft of the coarse, sandy hair standing defiantly upright on the crown of it; his complexion was sallow and pasty, and not in any way enhanced by a sparse scattering of tiny yellow freckles, plainly visible at close view; his generous mouth drooped, like his head, the lips pale, but firmly closed. In his ...
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ژورنال
عنوان ژورنال: Physics Today
سال: 1990
ISSN: 0031-9228,1945-0699
DOI: 10.1063/1.2810541