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Classical Physics papers — page 122

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Wave propagation in non Gaussian random media
We develop a compact perturbative series for accoustic wave propagation in a medium with a non Gaussian stochastic speed of sound. We use Martin - Siggia and Rose auxiliary field techniques to render…
Mariano Franco, Esteban CalzettaJun 9, 2014
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Transmission Lines Emulating Moving Media
In this paper, we show how the electromagnetic phenomena in moving magnetodielectric media can be emulated using artificial composite structures at rest. In particular, we introduce nonreciprocal…
Joni Vehmas, Silvio Hrabar, Sergei TretyakovJun 6, 2014
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Maximum work for Carnot-like heat engines with infinite heat source
An analysis of efficiency and its bounds at maximum work output for Carnot-like heat engines is conducted. The heat transfer processes are described by the linear law with time-dependent heat…
Rui Long, Wei LiuJun 3, 2014
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Does the electromotive force (always) represent work?
In the literature of Electromagnetism, the electromotive force of a "circuit" is often defined as work done on a unit charge during a complete tour of the latter around the circuit. We…
C. J. Papachristou, A. N. MagoulasMay 29, 2014
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The Fields of a Charged Particle in Hyperbolic Motion
A particle in hyperbolic motion produces electric fields that appear to terminate in mid-air, violating Gauss's law. The resolution to this paradox has been known for sixty years, but exactly why…
Joel Franklin, David J. GriffithsMay 29, 2014
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Power flow in a small electromagnetic energy harvesting system excited by mechanical motion
In this study the power flow in a coupled mechanical and electromagnetic harvesting system in presence of both positional and electrical fluctuations is analyzed. Explicit expressions for the power…
Lars Egil HelsethMay 27, 2014
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Experimental demonstration of a multiphysics cloak: manipulating heat flux and electric current simultaneously
In past years, triggered by their successful realizations in electromagnetics, invisible cloaks have experienced rapid development and have been widely pursued in many different fields, though so far…
Yungui Ma, Yichao Liu, Muhammad Raza et al.May 27, 2014
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The Preferred System of Reference Reloaded
According to Karl Popper assumptions are statements used to construct theories. During the construction of a theory whether the assumptions are either true or false turn out to be irrelevant in view…
Israel PerezMay 26, 2014
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Cantilever Beam Equation for Almost Arbitrary Deflections: Derivation and Worked Examples
We derived a non-linear 4th-order ordinary differential equation the solutions of which lead to the exact shapes of the cantilever beam. The result of the equation in a non-dimensional form was found…
Aleš BerkopecMay 22, 2014
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On the accuracy of the Timoshenko beam theory above the critical frequency: best shear coefficient
We obtain values for the shear coefficient both below and above the critical frequency by comparing the results of the Timoshenko beam theory with experimental data published recently. The best…
J. A. Franco-Villafañe, R. A. Méndez-SánchezMay 19, 2014
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Special Relativity from the Dynamical Viewpoint
Arguments are reviewed and extended in favor of presenting special relativity at least in part from a more mechanistic point of view. A number of generic mechanisms are catalogued and illustrated…
William M. NelsonMay 15, 2014
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Transformation cloaking and radial approximations for flexural waves in elastic plates
It is known that design of elastic cloaks is much more challenging than the design idea for acoustic cloaks, cloaks of electromagnetic waves or scalar problems of anti-plane shear. In this paper, we…
M. Brun, D. J. Colquitt, I. S. Jones et al.May 13, 2014
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Scalar wave scattering by two-layer radial inhomogeneities
It is known that the Jost-function formulation of quantum scattering theory can be applied to classical problems concerned with the scattering of a plane scalar wave by a medium with a spherically…
Umaporn Nuntaplook, John A AdamMay 12, 2014
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The simplest example of the use of the method of images
It is shown that the system consisting of two infinite and parallel planes, one of them a conductor, and the other an insulator with a uniform distribution of charges, is the simplest example of the…
Antonio S. de CastroMay 11, 2014
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The contact of elastic regular wavy surfaces revisited
We revisit the classic problem of an elastic solid with a two-dimensional wavy surface squeezed against an elastic flat half-space from infinitesimal to full contact. Through extensive numerical…
Vladislav A. Yastrebov, Guillaume Anciaux Jean-Francois MolinariMay 9, 2014
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A nonlinearity in permanent-magnet systems used in watt balances
Watt balances are used to measure the Planck constant and will be used in the future to realize mass at the kilogram level. They increasingly rely on permanent magnet systems to generate the magnetic…
Shisong Li, Stephan Schlamminger, Jon PrattMay 8, 2014
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Temporal behavior of laser induced elastic plate resonances
This paper investigates the dependence on Poisson's ratio of local plate resonances in low attenuating materials. In our experiments, these resonances are generated by a pulse laser source and…
Jérôme Laurent, Daniel Royer, Claire PradaApr 29, 2014
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A Criticism of "Gas Mode" Reinterpretations of the Michelson-Morley and Similar Experiments
It has been argued by R. T. Cahill and others that a Michelson interferometer in "gas mode" - in which the light paths are through an included gaseous medium - are able to detect and have…
Daniel ShanahanApr 24, 2014
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How multiplicity determines entropy and the derivation of the maximum entropy principle for complex systems
The maximum entropy principle (MEP) is a method for obtaining the most likely distribution functions of observables from statistical systems, by maximizing entropy under constraints. The MEP has…
Rudolf Hanel, Stefan Thurner, Murray Gell-MannApr 22, 2014
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Submilisecond acoustic pulses: effective pitch and Weber-Fechner law in discrimination of duration times
The enclosed tests demonstrate that an effective pitch can be attributed to acoustic signals shorter then tenths of milliseconds. A power-law dependence of this pitch on the signal's duration…
Marcin Majka, Paweł Sobieszczyk, Robert Gębarowski et al.Apr 18, 2014
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Electromagnetic fields in matter revisited
The force density on matter and the kinetic energy-momentum tensor of the electromagnetic field in matter are obtained starting from Maxwell equations and Lorentz force at microscopic level and…
Rodrigo Medina, J. StephanyApr 18, 2014
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On a necessary criterion for stability of steady solutions of complex Ginzburg-Landau equation -- a counterexample to the 'maximum entropy production principle'
A maximum entropy production principle (MEPP) has been postulated to be a criterion of stability for steady states of open systems [Martyushev et al., Phys. Rep. 426, 1 (2006)]. We find a necessary…
Andrea Di VitaApr 14, 2014
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A unique focusing property of a parabolic mirror for neutrons in the gravitational field: geometric proof
An extraordinary focusing property of a parabolic mirror for ultracold neutrons in the presence of the gravitational field was first reported by A. Steyerl and co-authors. It was shown that all…
S. MasalovichApr 14, 2014
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The Lorentz force law and its connections to hidden momentum, the Einstein-Laub force, and the Aharonov-Casher effect
The Lorentz force of classical electrodynamics, when applied to magnetic materials, gives rise to hidden energy and hidden momentum. Removing the contributions of hidden entities from the Poynting…
Masud MansuripurApr 12, 2014
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Relativistic corrections to the central force problem in a generalized potential approach
We present a novel technique to obtain relativistic corrections to the central force problem in the Lagrangian formulation, using a generalized potential energy function. We derive a general…
Ashmeet Singh, Binoy Krishna PatraApr 10, 2014
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