In this paper we study the motion of a charged particle in the presence of a magnetic field created by three different systems of wires: an infinite rectilinear filament, a circular wire and the union of both. In the first case we prove that the equations of motion are Liouville integrable and we provide a complete description of the trajectories, which turn out to be of helicoidal type. In the...

Chile, a long and narrow country in South America, is situated between the Andes mountains to the east and the Pacific Ocean to the west. It is bordered by Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the south (Fig. 1). Chilean territory includes the Pacific islands of Juan Fern andez, Salas y G omez, Desventuradas and Easter Island in Oceania. C...

Niikawa,N. 6739 Nishi.M. 6726 Niwa,O. 6709 Nixon.P. 6715 Noda.H. 6700 O'Hare.M.C. 6703 Okayama.H. 6485 Okazaki.K. 6485 Okazaki.N. 6485 Omura.T. 6700 Pakula.T.M. 6553 Pang,C.-P. 6731 Papaconstantinou.J. 6677 Pearce.J.H. 6713 PetruSyte.M. 6607 Polten,A. 6746 Pommier.Y. 6611 Pulleyblank.D.E. 6523 Puurand.U. 6694 Qiu,H. 6665 Rabek,J.P. 6677 Rafalski,J.A. 6531 RajBhandary,U.L. 6699 Rathgeber.G. 6633...

We examine the problem of almost-uniform sampling proper q-colorings of a graph whose maximum degree is ∆. A famous result, discovered independently by Jerrum [30] and Salas and Sokal [38], is that, assuming q > (2+δ)∆, the Glauber dynamics (a.k.a. single-site dynamics) for this problem has mixing time O(n logn), where n is the number of vertices, and thus provides a nearly linear time sampling...

Hariharan, Sathya N. M.S., Purdue University, August 2014. Improved Random Demodulator for Compressed Sensing Applications . Major Professor: Walter D. Leon-Salas. The advances in the field of signal processing have led to the continuous increase in the bandwidth of signals. Sampling these signals becomes harder and harder due to the increased bandwidth. This brings in need for a complex high r...

Mailing address: Paulo de Tarso Veras Farinatti Laboratório de Atividade Física e Promoção da Saúde (LABSAU), Instituto de Educação Física e Desportos, Universidade do Estado do Rio de Janeiro Rua São Francisco Xavier, 524, 8o andar, salas 8.121-F e 8.133-F 20550-013 – Rio de Janeiro, RJ, Brazil. E-mail: farinatt@uerj.br ABSTRACT The physiological adjustments to exercise have been extensively i...

The autbor greatly benefited from several discussions with Dr. Rafael Salas. Executive Director of UNFPA, and Dr. A. Thavarajah, Chief, Office of Policy And\sis and Statistics, UXFPA, and their staffs. Dr. Hirofumi Ando was especially htlpful. Dr. George Brown of the Population Council, Dr. Lee Jay Cho of the East;$'est Papulation Institute, Dr. Paul Demeny of the Population Council, Dr. James ...

The smooth clam Callista chione (Linnaeus, 1758), is distributed on sandy bottoms throughout the Mediterranean Sea and European Atlantic coasts over 0-180 m depth range (SALAS, 2011). This species is of great commercial interest in Spain, and is intensively exploited along the Catalan coast (DOGC, 2008). Catches have dramatically decreased over the recent years, threatening the biological and e...

Mutants of foot-and-mouth disease virus (FMDV) with altered biological properties can be selected during the course of persistent infection of BHK-21 cells with FMDV C-S8c1 (J. C. de la Torre, E. Martínez-Salas, J. Díez, A. Villaverde, F. Gebauer, E. Rocha, M. Dávila, and E. Domingo, J. Virol. 62:2050-2058, 1988). Two nucleotide substitutions, U to C at position -376 and A to G at position -15,...

Most modern organizations require individuals to work in teams to perform their tasks. Information systems development teams, advertising teams, and new product development teams are only a few examples from the business community. The group work environment creates challenges for the group members that may affect the group’s performance. The relevance and importance of group performance and it...