BCB Based Packaging for Low Actuation Voltage RF MEMS DevicesThis paper outlines the issues related to RF MEMS packaging and low actuation voltage. An original approach is presented concerning the modeling of capacitive contacts using multiphysics simulation…David Peyrou, Fabienne Pennec, Hikmat Achkar et al.·Sep 19, 2007SaveLearn
Effect of Motion of the Reference Frame on Geometrical Form of the Line of Monopole SingularityThe monopole singularity string, infinite direct line in the rest reference frame, is considered as a rigid physical line, and behavior of its geometrical form under the Lorentz transformations is…V. M. Red'kov·Sep 16, 2007SaveLearn
About Superluminal motions and Special Relativity: A Discussion of some recent Experiments, and the solution of the Causal ParadoxesSome experiments, performed at Berkeley, Cologne, Florence, Vienna, Orsay, Rennes, etc., led to the claim that something seems to travel with a group velocity larger than the speed c of light in…Erasmo Recami, Flavio Fontana, Roberto Garavaglia·Sep 16, 2007SaveLearn
Maxwell equations in Riemannian space-time, geometry effect on material equations in mediaThe known possibility to consider the (vacuum) Maxwell equations in a curved space-time as Maxwell equations in flat space-time(Mandel'stam L.I., Tamm I.E.) taken in an effective media the…V. M. Red'kov, N. G. Tokarevskaya, E. M. Bychkouskaya et al.·Sep 15, 2007SaveLearn
Sub-luminal wave bullets: Exact Localized subluminal Solutions to the Wave EquationsIn this work it is shown how to obtain, in a simple way, localized (non- diffractive) subluminal pulses as exact analytic solutions to the wave equations. These new ideal subluminal solutions, which…Michel Zamboni-Rached, Erasmo Recami·Sep 14, 2007SaveLearn
Influence of particle shape on shear stress in granular mediaWe analyze the contact and force networks in a dense confined packing of pentagonal particles simulated by means of the contact dynamics method. The particle shape effect is evidenced by comparing…émilien Azema, Farhang Radjaï, Robert Peyroux et al.·Sep 14, 2007SaveLearn
On the Localized superluminal Solutions to the Maxwell EquationsIn the first part of this article the various experimental sectors of physics in which Superluminal motions seem to appear are briefly mentioned, after a sketchy theoretical introduction. In…Erasmo Recami, Michel Zamboni-Rached, Kleber Z. Nobrega et al.·Sep 14, 2007SaveLearn
A Boussinesq system for two-way propagation of interfacial wavesThe theory of internal waves between two layers of immiscible fluids is important both for its applications in oceanography and engineering, and as a source of interesting mathematical model…Hai Yen Nguyen, Frédéric Dias·Sep 13, 2007SaveLearn
Enhancement of the Benjamin-Feir instability with dissipationIt is shown that there is an overlooked mechanism whereby some kinds of dissipation can enhance the Benjamin-Feir instability of water waves. This observation is new, and although it is…Thomas J. Bridges, Frederic Dias·Sep 10, 2007SaveLearn
Kinematics of deformable mediaWe investigate the kinematics of deformations in two and three dimensional media by explicitly solving (analytically) the evolution equations (Raychaudhuri equations) for the expansion, shear and…Anirvan Dasgupta, Hemwati Nandan, Sayan Kar·Sep 5, 2007SaveLearn
Linear frictional forces cause orbits to neither circularize nor precessFor the undamped Kepler potential the lack of precession has historically been understood in terms of the Runge-Lenz symmetry. For the damped Kepler problem this result may be understood in terms of…P. M. Hamilton, M. Crescimanno·Aug 28, 2007SaveLearn
Discussion of "Second order topological sensitivity analysis" by J. Rocha de Faria et alThe article by J. Rocha de Faria et al. under discussion is concerned with the evaluation of the perturbation undergone by the potential energy of a domain Ω (in a 2-D, scalar Laplace equation…Marc Bonnet·Aug 28, 2007SaveLearn
Interaction of a Point Charge and a Magnet: Comments on "Hidden Mechanical Momentum Due to Hidden Nonelectromagnetic Forces"The interaction of a point charge and a magnetic moment (and by extension a point charge and a solenoid) is explored within well-defined point-charge magnetic-moment models where full calculations…Timothy H. Boyer·Aug 24, 2007SaveLearn
Relativistic Aberration for Accelerating ObserversWe investigate the effects of the aberration of light for a uniformly accelerating observer. The observer we consider is initially at rest with respect to a luminous spherical object--a star,…Robert Beig, J. Mark Heinzle·Aug 23, 2007SaveLearn
Comment on Experiments Related to the Aharonov-Bohm Phase ShiftRecent experiments undertaken by Caprez, Barwick, and Batelaan should clarify the connections between classical and quantum theories in connection with the Aharonov-Bohm phase shift. It is pointed…Timothy H. Boyer·Aug 23, 2007SaveLearn
The Physics of InformationWe review of the interface between (theoretical) physics and information for non-experts. The origin of information as related to the notion of entropy is described, first in the context of…F. Alexander Bais, J. Doyne Farmer·Aug 21, 2007SaveLearn
A geometric analysis of the Maxwell field in a vicinity of a multipole particle and new special functionsA method of solving Maxwell equations in a vicinity of a multipole particle (moving along an arbitrary trajectory) is proposed. The method is based on a geometric construction of a trajectory-adapted…Jerzy Kijowski, Piotr Podles·Aug 16, 2007SaveLearn
Electrically Small Supergain ArraysThe theory, computer simulations, and experimental measurements are presented for electrically small two-element supergain arrays with near optimal endfire gains of 7 dB. We show how the difficulties…Arthur D. Yaghjian, Terry H. O'Donnell, Edward E. Altshuler et al.·Aug 15, 2007SaveLearn
Origins of the Combinatorial Basis of EntropyThe combinatorial basis of entropy, given by Boltzmann, can be written H = N-1 W, where H is the dimensionless entropy, N is the number of entities and W is number of…Robert K. Niven·Aug 14, 2007SaveLearn
Physics of Non-Inertial Reference FramesPhysics of non-inertial reference frames is a generalizing of Newton's laws to any reference frames. The first, Law of Kinematic in non-inertial reference frames reads: the kinematic state of a…Timur F. Kamalov·Aug 12, 2007SaveLearn
Near-Field Focusing Plates and Their DesignThis paper describes the design of near-field focusing plates, which are grating-like structures that can focus electromagnetic radiation to spots or lines of arbitrarily small subwavelength…A. Grbic, R. Merlin·Aug 1, 2007SaveLearn
Comments on ``Spin Connection Resonance in Gravitational General Relativity''We comment on a recent article of M.W.Evans, Acta Physica Polonica B38 (2007) 2211. We point out that the equations underlying Evans' theory are highly problematic. Moreover, we demonstrate that…Gerhard W. Bruhn, Friedrich W. Hehl, Arkadiusz Jadczyk·Jul 30, 2007SaveLearn
Comment on "On an identity for the volume integral of the square of a vector field"Stewart has provided a position-space derivation of an identity for the volume integral of the square of a vector field that was quoted by Gubarev, Stodolsky and Zakharov. In this comment, I provide…Robert L. Intemann·Jul 27, 2007SaveLearn
Poynting's theorem for planes waves at an interface: a scattering matrix approachWe apply the Poynting theorem to the scattering of monochromatic electromagnetic planes waves with normal incidence to the interface of two different media. We write this energy conservation theorem…V. Dominguez-Rocha, C. Zagoya, M. Martinez-Mares·Jul 25, 2007SaveLearn
Electrical charges and tribology of insulating materialsElectrical charges generation occurring during contact and friction of insulating materials has been identified for a long time. However the contribution of these electrical charges to the friction…Christelle Guerret-Piecourt, Sandrine Bec, Daniel Treheux·Jul 18, 2007SaveLearn