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Classical Physics papers — page 167

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Strong signatures of radiation reaction below the radiation dominated regime
The influence of radiation reaction (RR) on multiphoton Thomson scattering by an electron colliding head-on with a strong laser beam is investigated in a new regime, in which the momentum transferred…
A. Di Piazza, K. Z. Hatsagortsyan, C. H. KeitelOct 9, 2008
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Pressure control system with nonlocal friction
We analyze the motion of a pressure control system described by a differential equation with nonlocal dissipative force. This system is composed by an oscillator, a membrane and a constant force. We…
Kwok Sau Fa, S. R. OsipiOct 9, 2008
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Numerical upscaling of the permeability of a randomly cracked porous medium
The equivalent permeability of a randomly cracked porous material is studied using a finite element program in which a four-nodes zero-thickness element is implemented for modelling the cracks. The…
Siavash Ghabezloo, Ahmad PouyaOct 6, 2008
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Brachistochrones With Loose Ends
The classical problem of the brachistochrone asks for the curve down which a body sliding from rest and accelerated by gravity will slip (without friction) from one point to another in least time. In…
Stephan Mertens, Sebastian MingrammOct 3, 2008
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Relativistic Mechanics and a Special Role for the Coulomb Potential
It is shown that a nonrelativistic mechanical system involving a general nonrelativistic potential V(|r1-r2|) between point particles at positions r1 and r2 can be extended to a Lagrangian system…
Timothy H. BoyerOct 2, 2008
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Modeles Multiparticulaires Des Materiaux Multicouches M45n et M4(2n+1)M Pour L'Analyse Des Effets De Bord Multiparticle Models of Multilayered Materials M45n and M4(2n+1)M for Edge Effect Analysis
The Multiparticle Models of Multilayered Materials (models M4) are developed to analyze easily the 3D stress fields which produce delamination or transverse crackings in laminates. The M4 models are…
Armelle Chabot, Alain EhrlacherSep 29, 2008
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Lawn tennis balls, Rolling friction experiment and Trouton viscosity
We took three lawn tennis balls arbitrarily. One was moderately old, one was old and another was new. Fabricating a conveyor belt set-up we have measured rolling friction coefficients, μr, of…
Ankit Singh, Devang Jain, Kaustubh Kulkarni et al.Sep 28, 2008
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Sedimentation-consolidation of a double porosity material
This paper studies the sedimentation-consolidation of a double porosity material, such as lumpy clay. Large displacements and finite strains are accounted for in a multidimensional setting.…
Henry Wong, Chin J. Leo, Jean-Michel Pereira et al.Sep 25, 2008
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Measuring the internal clock of the electron
The existence of an internal frequency associated to any elementary particle conjectured by de Broglie is compared with a classical description of the electron, where this internal structure…
Martin RivasSep 22, 2008
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Experimental evidence of an instability over an impedance wall in a duct with flow
An experimental investigation of the acoustical behaviour of a liner in a rectangu- lar channel with grazing flow has been conducted. The liner consists of a ceramic structure of parallel square…
Yves Aurégan, Maud LerouxSep 22, 2008
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Dynamics of liquid nanofilms
The van der Waals forces across a very thin liquid layer (nanofilm) in contact with a plane solid wall make the liquid nonhomogeneous. The dynamics of such flat liquid nanofilms is studied in…
Henri Gouin, Sergey GavrilyukSep 20, 2008
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Uncertainties inherent in the decomposition of a Transformation
This contribution adds to the points on the <indeterminacy of special relativity> made by De Abreu and Guerra. We show that the Lorentz Transformation can be composed by the physical observations…
Chandru IyerSep 19, 2008
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Variational formulation of the electromagnetic radiation-reaction problem
A fundamental issue in classical electrodynamics is represented by the search of the exact equation of motion for a classical charged particle under the action of its electromagnetic (EM) self-field…
M. Tessarotto, C. Cremaschini, M. DorigoSep 19, 2008
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The theory of relativity and the Pythagorean theorem
It is shown that the most important effects of special and general theory of relativity can be understood in a simple and straightforward way. The system of units in which the speed of light c is…
L. B. OkunSep 15, 2008
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The absoption refrigerator as a thermal transformer
The absorption refrigerator can be considered a thermal transformer, i.e. a device that is analogous to the electric transformer. The analogy is based on a correspondence between the extensive…
Friedrich HerrmannSep 13, 2008
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A mechanical model for liquid nanolayers
Liquids in contact with solids are submitted to intermolecular forces making liquids heterogeneous and stress tensors are not any more spherical as in homogeneous bulks. The aim of this article is to…
Henri GouinSep 13, 2008
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The determination of the apsidal angles and Bertrand's theorem
We derive an expression for the determination of the apsidal angles that holds good for arbitrary central potentials. Then we discuss under what conditions the apsidal angles remain independent of…
Filadelfo C. Santos, Vitorvani Soares, Alexandre C. TortSep 11, 2008
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Reversal in time order of interactive events: Collision of inclined rods
In the rod and hole paradox as described by Rindler (1961 Am. J. Phys. 29 365-6), a rigid rod moves at high speed over a table towards a hole of the same size. Observations from the inertial frames…
Chandru Iyer, G. M. PrabhuSep 10, 2008
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Experimental Validation of Simplified Free Jet Turbulence Models Applied to the Vocal Tract
Sound production due to turbulence is widely shown to be an important phenomenon involved in a.o. fricatives, singing, whispering and speech pathologies. In spite of its relevance turbulent flow is…
Xavier Grandchamp, Annemie Van Hirtum, Xavier PelorsonSep 9, 2008
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Quasi-TEM modes in rectangular waveguides: a study based on the properties of PMC and hard surfaces
Hard surfaces or magnetic surfaces can be used to propagate quasi-TEM modes inside closed waveguides. The interesting feature of these modes is an almost uniform field distribution inside the…
Raphaël Pierre, Gérard Tayeb, Boris Gralak et al.Sep 9, 2008
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Bernoulli correction to viscous losses. Radial flow between two parallel discs
For a massless fluid (density = 0), the steady flow along a duct is governed exclusively by viscous losses. In this paper, we show that the velocity profile obtained in this limit can be used to…
Jordi Armengol, Josep Calbo, Toni Pujol et al.Sep 8, 2008
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The absorber hypothesis of electrodynamics
We test the absorber hypothesis of the action-at-a-distance electrodynamics for globally-bounded solutions of a finite-particle universe. We find that the absorber hypothesis forbids globally-bounded…
Jayme De LucaSep 1, 2008
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Dumbbell diffusion in a spatially periodic potential
We present a numerical investigation of the Brownian motion and diffusion of a dumbbell in a two-dimensional periodic potential. Its dynamics is described by a Langevin model including the…
Jochen Bammert, Steffen Schreiber, Walter ZimmermannSep 1, 2008
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On the Stability of Electrostatic Orbits
We analyze the stability of two charged conducting spheres orbiting each other. Due to charge polarization, the electrostatic force between the two spheres deviates significantly from 1/r2 as they…
Shubho Banerjee, Bradford Taylor, Anand BanerjeeAug 28, 2008
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Ultrashort Focused Electromagnetic Pulses
In this article we present a closed analytical description for few-cycle, focused electromagnetic pulses of arbitrary duration and carrier-envelope-phase (CEP). Because of the vectorial character of…
Daniel an der Brügge, Alexander PukhovAug 28, 2008
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