© 2016 Regents of the University of California.The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,062 new measurements from 721 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. All the particle properties and search limits are listed in Summary Tables. We also give numerous (...) tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 117 reviews are many that are new or heavily revised, including those on Pentaquarks and Inflation. The complete Review is published online in a journal and on the website of the Particle Data Group. The printed PDG Book contains the Summary Tables and all review articles but no longer includes the detailed tables from the Particle Listings. A Booklet with the Summary Tables and abbreviated versions of some of the review articles is also available. (shrink)

This paper addresses the doubts voiced by Wigner about the physical relevance of the concept of geometrical points by exploiting some facts known to all but honored by none: Almost all real numbers are transcendental; the explicit representation of any one will require an infinite amount of physical resources. An instrument devised to measure a continuous real variable will need a continuum of internal states to achieve perfect resolution. Consequently, a laboratory instrument for measuring a continuous variable in a finite (...) time can report only a finite number of values, each of which is constrained to be a rational number. It does not matter whether the variable is classical or quantum-mechanical. Now, in von Neumann’s measurement theory (von Neumann, Mathematical Foundations of Quantum Mechanics, Princeton University Press, Princeton, [1955]), an operator A with a continuous spectrum—which has no eigenvectors—cannot be measured, but it can be approximated by operators with discrete spectra which are measurable. The measurable approximant F(A) is not canonically determined; it has to be chosen by the experimentalist. It is argued that this operator can always be chosen in such a way that Sewell’s results (Sewell in Rep. Math. Phys. 56: 271, [2005]; Sewell, Lecture given at the J.T. Lewis Memorial Conference, Dublin, [2005]) on the measurement of a hermitian operator on a finite-dimensional vector space (described in Sect. 3.2) constitute an adequate resolution of the measurement problem in this theory. From this follows our major conclusion, which is that the notion of a geometrical point is as meaningful in nonrelativistic quantum mechanics as it is in classical physics. It is necessary to be sensitive to the fact that there is a gap between theoretical and experimental physics, which reveals itself tellingly as an error inherent in the measurement of a continuous variable. (shrink)

First published in 1999. Routledge is an imprint of Taylor & Francis, an informa company.

It is a safe prediction that, especially now with cultural contacts freely flowing between East and West in both directions, the Hungarian thinker Istvan Bibo will soon be given full accolade as one of the most outstanding political theorists of this century, in stature equal to the �greats� in the entire European tradition of political thought. Bibo's significance far exceeds local, parochial interests. While profoundly original and organically stemming from Hungarian culture, Bibo belongs also to the �West�. If his political (...) thought is to be epitomized in one succinct phrase, it is �the realism of moralism�, or the almost flawless synthesis of a deeply radical, morally infused vision and value-system with the hard-nosed, unsentimental realist-s insight into enduring problems of politics and society. This synthesis is �almost� flawless: in the closing section of this article I will advance a few constructively critical remarks concerning some questionable points in the trajectory of Bibo's thought. (shrink)

Contrary to what might be expected given a religious or other motivation, Pierre Duhem's interest in mediaeval science was the result of his surprise encounter with Jordanus de Nemore while working on Les origines de la statique in the late autumn of 1903. Historical assumptions common among physicists at that time may explain this surprise, which occasioned a frantic search for more mediaeval precursors for Renaissance mechanics. It also raised serious historiographical problems that threatened even his methodological views, until they (...) were resolved in his To save the phenomena of 1908. (shrink)

The dominant view of women has changed radically during the last century. These changes have had an important impact on the way of life of women in general and, undoubtedly, on women as patients. So far, gender differences have received little attention when developing healthcare services. Stroke hits a great number of elderly women. Wyller et al. found that women seemed to be harder hit by stroke than men; they achieved lower scores in tests of motor, cognitive and ADL functions, (...) both in the acute phase and 1 year after stroke. It is reasonable to expect that differences in outcome among male and female sufferers may in part be explained by the fact that rehabilitation services are designed primarily to meet the needs of men. de Beauvoir's feminist theory maintains that one's body is fundamental in creating the person, which is a lifelong process. Traditionally, the female body has been exposed to alienation and oppression through life. This has led women to develop a life in immanence. This we feel can be of significance in connection with rehabilitation after a stroke, particularly for elderly women. In this article we will discuss how de Beauvoir's theory can throw new light on the experiences and rehabilitation of elderly women and point to ways of improving the process of rehabilitation. (shrink)

Violent: Isn't his account of philosophy, however, rather strange?--not, I fear, in the sense that it is novel or quite unusual, but in the sense that it is oddly misguided? Part of the oddness comes out in its titular description--"the search for ultimate reality." We find that he views ontology as the center of philosophy, for "philosophy is that cognitive endeavor in which the question of being is asked". "The search for ultimate reality beyond everything that seems to be real (...) is the search for being-itself, for the power of being in everything that is. It is the ontological question, the root question of every philosophy". (shrink)