Electromagnetic Interactions and Hadronic Structure,edited by F. Close,S. Donnachie and G. Shore

The first part considers the theory of the liquid state, discusses the influence of quantum effects on liquid beheviour, and introduces the dimensionless quantum parameter A? which expresses their relative importance. The second part surveys the experimental results for the chief physical properties of liquid rare gases (and also of liquid methane). The observed quantities have been ‘reduced’ for comparison purposes to dimensionless numbers, each being divided by an appropriate parameter of its own dimensions.     

Comment on a paper by G. H. Weiss,S. Havlin,and A. Bunde

A simple proof is pointed out for the asymptotic exponential decay of then-step survival probability of a random walk on a finite lattice with traps in the limit asn . Some bounds are mentioned, which are valid for finiten and for symmetric random walks.     

Klein,Einstein, and Five-Dimensional Unification

I examine the changing attitudes of Oskar Klein (1894–1977) and Albert Einstein (1879–1955) toward the notion of extending general relativity by an extra dimension with the aim of encompassing electromagnetism and gravitation in a unified field theory. I show how Klein developed his model of five-dimensional unification with the goal of explaining the discreteness of atomic energy levels, and how Einstein later embraced that goal. By examining the correspondence between Klein and Einstein, some of which was relayed through Paul Ehrenfest (1880–1933), I speculate that Klein’s work helped motivate Einstein to explore deterministic five-dimensional theories as a potential alternative to probabilistic quantum mechanics. Finally, I consider the contributions of Wolfgang Pauli (1900–1958) to the subject and elucidate his role in convincing Klein and Einstein that their models were not viable. Paul Halpern is Professor of Physics at the University of the Sciences in Philadelphia. He currently is a member of the Executive Committee of the Forum on the History of Physics of the American Physical Society.     

Kaluza,Klein, confinement,and nuclear forces

The nonsymmetric Kaluza-Klein and Jordan-Thiry theories are reviewed as interesting propositions of physics in higher dimensions. It is shown how a dielectric model of confinement can be derived from interference effects in these theories. It is postulated that the old puzzle of nuclear physics,-particles, can be connected to the skewon fieldg _[v] and the scalar field in the nonsymmetric Jordan-Thiry theory. Similarities are pointed out between the nonsymmetric Jordan-Thiry Lagrangian in the flat space limit and the soliton bag model Lagrangian. Finally the nonsymmetric Jordan-Thiry Lagrangian is proposed as the bosonic part of the strong interaction Lagrangian.On leave of absence from the Institute of Philosophy and Sociology of the Polish Academy of Science, 00-330 Warsaw, Poland.