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Paul Ehrenfest was born on 18 January 1880 in Vienna to Jewish parents, [3] who were originally from Loštice in Moravia (now part of the Czech Republic). His parents, Sigmund Ehrenfest and Johanna Jellinek, managed a grocery store. Although the family was not overly religious, Paul studied Hebrew and Jewish history. Later, he always emphasized ...
The implications of the Ehrenfest theorem for systems with classically chaotic dynamics are discussed at Scholarpedia article Ehrenfest time and chaos. Due to exponential instability of classical trajectories the Ehrenfest time, on which there is a complete correspondence between quantum and classical evolution, is shown to be logarithmically ...
The End of America: Letter of Warning to a Young Patriot is a 2007 non-fiction book by Naomi Wolf, published by Chelsea Green Publishing of White River Junction, Vermont. Wolf argues that events of the early 2000s paralleled steps taken in the early years of the twentieth century's worst dictatorships and called Americans to take action to ...
The book has three chapters. The first chapter, "Paul or the Discovery of the Irrational", written in the third person, is about physicist Paul Ehrenfest.The chapter opens with Ehrenfest shooting dead his son Vassily, who suffered from Down syndrome, and then himself.
The Ehrenfest paradox concerns the rotation of a "rigid" disc in the theory of relativity. In its original 1909 formulation as presented by Paul Ehrenfest in relation to the concept of Born rigidity within special relativity , [ 1 ] it discusses an ideally rigid cylinder that is made to rotate about its axis of symmetry. [ 2 ]
This relationship leads to the concept of thermal time which has been considered as a possible basis for a fully general-relativistic thermodynamics. It has been shown that the Tolman–Ehrenfest effect can be derived by applying the equivalence principle to the concept that temperature is the rate of thermal time with respect to proper time. [1]
America is a young adult novel written by E. R. Frank.It tells the story of America, a biracial boy.. The author of the book, E.R. Frank, is herself a social worker.In an author's note at the end of the book, she says she has worked with many Americas over the years.
Beaty was born in Crow, West Virginia.He studied for his B.A. and M.A. at the University of Virginia, and completed a Ph.D. in philosophy at Columbia University in 1921. He taught English at Southern Methodist University (SMU), from 1919 (becoming a full professor in 1922) until his retirement in 1957, having been appointed by SMU's first president, Robert Hyer.