In this paper we study existence and orbital stability for solitary waves of the nonlinear Klein-Gordon equation. The energy of these solutions travels as a localized packet, hence they are a particular type of solitons. In particular we are interested in sufficient conditions on the potential for the existence of solitons. Our proof is based on the study of the ratio energy/charge of a functio...

At the end of the 19 century, Wilhelm Windelband proposed a distinction between nomothetic and idiographic research, which became highly relevant for the discussion of the nature of psychological science. During the 20 th century, a number of writers (including William Stern, Gordon Allport, James Lamiell and David Magnusson) have criticized the focus on variables rather than persons, and popul...

In the dual risk model, we study periodic dividend problem with a non-exponential discount function which results in time-inconsistent control problem. Viewing it within game theoretic framework, extend Hamilton-Jacobi-Bellman (HJB) system of equations from fixed terminal to time ruin and derive verification theorem, generalize theory classical optimal dividend. Und...

The continual reduction of size has made microcomputers not only faster, but also cheaper. There has been no occasion to make a compromise between performance and cost. This is a reversal of the normal state of affairs. Gordon Moore, speaking at a meeting held at the Cavendish Laboratory in March 1997 to celebrate the centennial of the discovery of the electron, described it as a violation of M...

J. E. Gordon, C. Marcenat, J. P. Franck, I. Isaac, Guanwen Zhang, R. Lortz, C. Meingast, F. Bouquet, R. A. Fisher, and N. E. Phillips Physics Department, Amherst College, Amherst, Massachusetts 01002 DRFMC, SPSMS, CEA-Grenoble, 38054, Grenoble, France Department of Physics, University of Alberta, Edmonton, Alberta, Canada T6G2J1 Forschungszentrum Karlsruhe, Institut für Festkörperphysik, 76021 ...

This is a set of lecture notes used in a course on model theory at Virginia Commonwealth University (Math 591 Topics: Logic and Mathematical Structures), which I taught jointly with Sean Cox in the spring of 2014. Most of the material contained in these notes can be found in the following sources. References: • Chang and Keisler. Model Theory, Studies in Logic and the Foundations of Mathematics...

Articles republished from The ' British Medical Journal '. Contributed by St. J. D. Buxton, E. M. Cowell, C. Frankau, G. E. Gask, A. T. Hart, G. Jefferson, W. A. Lethem, D. D. Logan, P. H. Mitchiner, G. E. IMeligan, C. M. Page, J. Rickman, C. Seeley, G. Gordon-Taylor, J. M. Vaughan, J. M. Weddell, M. B. Wright. 1939. H. K. Lewis and Company, Limited, London. Pp. xii plus 256. Illustrated. Price...

Psychologists use the term ‘idiographic’ to refer to the characteristics of unique individuals and ‘nomothetic’ to refer to universal characteristics. It is widely accepted that Gordon Allport borrowed those terms from the German philosopher Wilhelm Windelband and introduced the idiographic/nomothetic distinction to American psychology. However, in this paper we argue that the terms were made a...

The phase diagram of QCD at finite baryon density and temperature was to my knowledge first envisioned by Cabiibo and Parisi,[1] and is shown in Fig. 1. By 1983, Gordon Baym had drawn the phase diagram shown in Fig. 2, a phase diagram that had become more sophisticated and included the possibility of a liquid-gas phase transition at relatively low temperature and density, and pion condensation ...

Sine-Gordon equation under a quasi-periodic perturbation or a chaotic perturbation is studied. Existence of a homoclinic tube is proved. Established are chaos associated with the homoclinic tube, and ‘‘chaos cascade’’ referring to the embeddings of smaller scale chaos in larger scale chaos. 2003 Elsevier Ltd. All rights reserved.