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Classical Physics papers — page 166

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Thermal noise of microcantilevers in viscous fluids
We present a simple theoretical framework to describe the thermal noise of a microscopic mechanical beam in a viscous fluid: we use the Sader approach to describe the effect of the surrounding fluid…
Ludovic BellonNov 20, 2008
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Classical Langevin dynamics of a charged particle moving on a sphere and diamagnetism: A surprise
It is generally known that the orbital diamagnetism of a classical system of charged particles in thermal equilibrium is identically zero -- the Bohr-van Leeuwen theorem. Physically, this null result…
N. Kumar, K. Vijay KumarNov 19, 2008
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Kinetics of the thermal degradation of Erica arborea by DSC: Hybrid kinetic method
The scope of this work was the determination of kinetic parameters of the thermal oxidative degradation of a Mediterranean scrub using a hybrid method developed at the laboratory. DSC and TGA were…
Dominique Cancellieri, Eric Leoni, Jean Louis RossiNov 18, 2008
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Dilatation of a one-dimensional nonlinear crack impacted by a periodic elastic wave
The interactions between linear elastic waves and a nonlinear crack with finite compressibility are studied in the one-dimensional context. Numerical studies on a hyperbolic model of contact with…
Stéphane Junca, Bruno LombardNov 17, 2008
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Minimal Magnetic Energy Theorem
Thomson's theorem states that static charge distributions in conductors only exist at the conducting surfaces in an equipotential configuration, yielding a minimal electrostatic energy. In this…
M. C. N. Fiolhais, C. ProvidenciaNov 16, 2008
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Wave turbulence on the surface of a ferrofluid submitted to a magnetic field
We report the observation of wave turbulence on the surface of a ferrofluid mechanically forced and submitted to a static normal magnetic field. We show that magnetic surface waves arise only above a…
François Boyer, Eric FalconNov 12, 2008
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Visualization and analysis of jet oscillation under transverse acoustic perturbation
Schlieren flow visualizations of transverse oscillations of jets submitted to an acoustic perturbation are analyzed in this paper. The aim is to estimate the shape and the position of the median line…
Patricio De La Cuadra, Christophe Vergez, Benoit FabreNov 3, 2008
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Bitemporal Dynamics Sinai Divergence, An Energetic Analog to Boltzmann's Entropy?
Sinai chaos is characterized by exponential divergence between neighboring trajectories of a point billiard. If the repulsive potential of the finite-diameter fixed particle in the middle of the…
Otto E. Rossler, Ramis MovassaghNov 2, 2008
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On the homogenization of orthotropic elastic composites by the strong-property-fluctuation theory
The strong-property-fluctuation theory (SPFT) provides a general framework for estimating the constitutive parameters of a homogenized composite material (HCM). We developed the elastodynamic SPFT…
Andrew J. Duncan, Tom G. Mackay, Akhlesh LakhtakiaOct 31, 2008
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Efficient resolution of the Colebrook equation
A robust, fast and accurate method for solving the Colebrook-like equations is presented. The algorithm is efficient for the whole range of parameters involved in the Colebrook equation. The…
Didier ClamondOct 30, 2008
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Origin of undesirable cracks during layer transfer
We investigate the origin of undesirable transverse cracks often observed in thin films obtained by the layer transfer technique. During this process, two crystals bonded to each other containing a…
Laurent Ponson, Kenneth Diest, Harry Atwater et al.Oct 28, 2008
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Bracket relations for relativity groups
Poisson bracket relations for generators of canonical transformations are derived directly from the Galilei and Poincaré groups of changes of space-time coordinates. The method is simple but…
Thomas F. JordanOct 25, 2008
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A constitutive model for unsaturated cemented soils under cyclic loading
On the basis of plastic bounding surface model, the damage theory for structured soils and unsaturated soil mechanics, an elastoplastic model for unsaturated loessic soils under cyclic loading has…
C. Yang, Yu-Jun Cui, Jean-Michel Pereira et al.Oct 24, 2008
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Compensation strategies for a lip-tube perturbation of French [u]: an acoustic and perceptual study of 4-year-old children
The relations between production and perception in 4-year-old children were examined in a study of compensation strategies for a lip-tube perturbation. Acoustic and perceptual analyses of the rounded…
Lucie Ménard, Pascal Perrier, Jérôme Aubin et al.Oct 23, 2008
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Reverse rotations in the circularly-driven motion of a rigid body
We study the dynamical response of a circularly-driven rigid body, focusing on the description of intrinsic rotational behavior (reverse rotations). The model system we address is integrable but…
Fernando ParisioOct 23, 2008
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A simple derivation of the electromagnetic field of an arbitrarily moving charge
The expression for the electromagnetic field of a charge moving along an arbitrary trajectory is obtained in a direct, elegant, and Lorentz invariant manner without resorting to more complicated…
Hamsa PadmanabhanOct 23, 2008
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On non-holonomic systems and variational principles
We consider the compatibility of the equations of motion which follow from d'Alembert's principle in the case of a general autonomous non-holonomic mechanical system in N dimensions, with…
Christofer Cronstrom, Tommi RaitaOct 20, 2008
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Equilibria in the Troposphere
We show that various types of equilibrium play an important part in the behaviour of the troposphere. In analogy to the electro-chemical potential (well-known in solid-state physics and…
Friedrich HerrmannOct 19, 2008
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Recent developments in the techniques of controlling and measuring suction in unsaturated soils
The difficulty of measuring and controlling suction in unsaturated soils is one of the reasons why the development of the mechanics of unsaturated soils has not been as advanced as that of saturated…
Pierre Delage, Enrique Romero, Alessandro TarantinoOct 17, 2008
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Validity of the one-dimensional limp model for porous materials
A straightforward criterion to determine the limp model validity for porous materials is addressed here. The limp model is an "equivalent fluid" model which gives a better description of the…
Olivier Doutres, Nicolas Dauchez, Jean-Michel Génevaux et al.Oct 17, 2008
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Tradeoff between Efficiency and Melting for a High-Performance Electromagnetic Rail Gun
We estimate the temperature distribution in the rails of an electromagnetic rail gun (EMG) due to the confinement of the current in a narrow surface layer resulting from the skin effect. In order to…
William C. McCorkle, Thomas B. BahderOct 16, 2008
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Interaction of reed and acoustic resonator in clarinetlike systems
Sound emergence in clarinetlike instruments is investigated in terms of instability of the static regime. Various models of reed-bore coupling are considered, from the pioneering work of Wilson and…
Fabrice Silva, Jean Kergomard, Christophe Vergez et al.Oct 16, 2008
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The effect of undrained heating on a fluid-saturated hardened cement paste
The effect of undrained heating on volume change and induced pore pressure increase is an important point to properly understand the behaviour and evaluate the integrity of an oil well cement sheath…
Siavash Ghabezloo, Jean Sulem, Jérémie Saint-MarcOct 10, 2008
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On Fick's first law and the equations of quasi-static motion governing the molecular diffusion
The problem of the molecular diffusion in a biphasic fluid mixture is studied here from the two complementary points of view of Continuum Mechanics - in a somewhat different manner from Truesdell in…
Thierry DésoyerOct 10, 2008
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Real-Time Nearfield Acoustic Holography: Implementation of the Direct and Inverse Impulse Responses in the Time-Wavenumber Domain
The aim of the study is to demonstrate that some methods are more relevant for implementing the Real-Time Nearfield Acoustic Holography than others. First by focusing on the forward propagation…
Jean-Hugh Thomas, Vincent Grulier, Sébastien Paillasseur et al.Oct 10, 2008
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