Saturated absorption spectroscopy: elimination of crossover resonances by use of a nanocellIt is demonstrated that velocity selective optical pumping/saturation resonances of reduced absorption in a Rb vapor nanocell with thickness L= λ, 2λ, and 3λ (resonant wavelength λ =…A. Sargsyan, D. Sarkisyan, A. Papoyan et al.·Nov 11, 2007SaveLearn
Short-time dynamics of a packing of polyhedral grains under horizontal vibrationsWe analyze the dynamics of a 3D granular packing composed of particles of irregular polyhedral shape confined inside a rectangular box with a retaining wall sub jected to horizontal harmonic forcing.…Émilien Azema, Farhang Radjaï, Robert Peyroux et al.·Nov 7, 2007SaveLearn
Continuous Limit of Discrete Systems with Long-Range InteractionDiscrete systems with long-range interactions are considered. Continuous medium models as continuous limit of discrete chain system are defined. Long-range interactions of chain elements that give…Vasily E. Tarasov·Nov 6, 2007SaveLearn
A mechanical experimental setup to simulate vocal folds vibrations. Preliminary resultsThis paper contributes to the understanding of vocal folds oscillation during phonation. In order to test theoretical models of phonation, a new experimental set-up using a deformable vocal folds…Nicolas Ruty, Annemie Van Hirtum, Xavier Pelorson et al.·Oct 23, 2007SaveLearn
Experimental validation and physical modelling of vocal folds pathologiesVoiced sounds involve self-sustained vocal folds oscillations due to the interaction between the airflow and the vocal folds. Common vocal folds pathologies like polyps and anatomical asymmetry…Nicolas Ruty, Claire Brutel, Xavier Pelorson et al.·Oct 23, 2007SaveLearn
Applicability of Boussinesq approximation in a turbulent fluid with constant propertiesThe equations of motion describing buoyant fluids are often simplified using a set of approximations proposed by J. Boussinesq one century ago. To resume, they consist in assuming constant fluid…Philippe-Emmanuel P. -E. Roche·Oct 18, 2007SaveLearn
Simple derivation of the special theory of relativity without the speed of light axiomWe show a very simple yet rigorous derivation of the invariance of the space-time interval (and hence the whole special relativity) just from the isotropy, homogeneity and a principle of relativity,…Ondrej Certik·Oct 17, 2007SaveLearn
Alternative Derivation of Electromagnetic Cloaks and ConcentratorsBeginning with a straightforward formulation of electromagnetic cloaking that reduces to a boundary value problem involving a single Maxwell first-order differential equation, explicit formulae for…Arthur D. Yaghjian, Stefano Maci·Oct 16, 2007SaveLearn
Apparition de structures tourbillonnaires de type Görtler dans une cavité parallélépipédique ouverte de forme variableThe interaction between a laminar boundary layer and an open cavity is investigated experimentally for Reynolds numbers between 860 and 32300. Flow visualizations are carried out for different…Thierry Faure, Nicolas Pechlivanian, François Lusseyran et al.·Oct 16, 2007SaveLearn
Shock-Induced Flows through Packed Beds: Transient RegimesThe early stage of the transient regimes in the shock-induced flows within solid-packed beds are investigated in the linear longwave and high-frequency approximation. The transient resistance law is…Yuri M. Shtemler, Isaac R. Shreiber, Alex Britan·Oct 15, 2007SaveLearn
Nouvelle analyse des phénomènes vibratoires en tournageIn the cutting process, machine-tools vibrations are generally a real problem when the amplitude crosses the limits of dimensional or surface quality workpiece precision required. It is necessary to…Claudiu-Florinel Bisu, Philippe Darnis, Jean-Yves K'Nevez et al.·Oct 15, 2007SaveLearn
Acoustic Probing of the Jamming Transition in an Unconsolidated Granular MediumExperiments with acoustic waves guided along the mechanically free surface of an unconsolidated granular packed structure provide information on the elasticity of granular media at very low pressures…Xavier Jacob, Vladislav Aleshin, Vincent Tournat et al.·Oct 11, 2007SaveLearn
Forces and momenta caused by electromagnetic waves in magnetoelectric mediaWe analyse the propagation of electromagnetic waves in magnetoelectric media. Recently, Feigel has predicted that such a medium may ``extract momentum from vacuum" in the sense that the total…Yuri N. Obukhov, Friedrich W. Hehl·Oct 11, 2007SaveLearn
Controlling suction by vapour equilibrium technique at different temperatures, application to the determination of the water retention properties of MX80 clayProblems related to unsaturated soils are frequently encountered in geotechnical or environmental engineering works. In most cases, for the purpose of simplicity, the problems are studied by…Anh-Minh Tang, Yu-Jun Cui·Oct 9, 2007SaveLearn
A new isotropic cell for studying the thermo-mechanical behavior of unsaturated expansive claysThis paper presents a new suction-temperature controlled isotropic cell that can be used to study the thermo-mechanical behavior of unsaturated expansive clays. The vapor equilibrium technique is…Anh-Minh Tang, Yu-Jun Cui, Nathalie Barnel·Oct 7, 2007SaveLearn
From Information Geometry to Newtonian DynamicsNewtonian dynamics is derived from prior information codified into an appropriate statistical model. The basic assumption is that there is an irreducible uncertainty in the location of particles so…Ariel Caticha, Carlo Cafaro·Oct 4, 2007SaveLearn
Dynamics of Fractal SolidsWe describe the fractal solid by a special continuous medium model. We propose to describe the fractal solid by a fractional continuous model, where all characteristics and fields are defined…Vasily E. Tarasov·Oct 3, 2007SaveLearn
Momentum of an electromagnetic wave in dielectric mediaAlmost a hundred years ago, two different expressions were proposed for the energy--momentum tensor of an electromagnetic wave in a dielectric. Minkowski's tensor predicted an increase in the…Robert N. C. Pfeifer, Timo A. Nieminen, Norman R. Heckenberg et al.·Oct 2, 2007SaveLearn
Reconstruction of Rayleigh-Lamb dispersion spectrum based on noise obtained from an air-jet forcingThe time-domain cross-correlation of incoherent and random noise recorded by a series of passive sensors contains the impulse response of the medium between these sensors. By using noise generated by…Eric Larose, Philippe Roux, Michel Campillo·Oct 1, 2007SaveLearn
Equation of motion of an interstellar Bussard ramjet with radiation and mass lossesAn interstellar Bussard ramjet is a spaceship using the protons of the interstellar medium in a fusion engine to produce thrust. In recent papers, it was shown that the relativistic equation of…C. Semay, B. Silvestre-Brac·Oct 1, 2007SaveLearn
Factorizations of one dimensional classical systemsA class of one dimensional classical systems is characterized from an algebraic point of view. The Hamiltonians of these systems are factorized in terms of two functions that together with the…S. Kuru, J. Negro·Sep 28, 2007SaveLearn
100 Years of dimensional analysis: New steps toward empirical law deductionOn the verge of the centenary of dimensional analysis (DA), we present a generalisation of the theory and a methodology for the discovery of empirical laws from observational data. It is well known…Michael Taylor, Angeles I. Diaz, Lucas A. Jodar-Sanchez et al.·Sep 22, 2007SaveLearn
Toroidal metamaterialIt is shown that a new type of metamaterial, a 3D-array of toroidal solenoids, displays a significant toroidal response that can be readily measured. This is in sharp contrast to materials that exist…K. Marinov, A. D. Boardman, V. A. Fedotov et al.·Sep 22, 2007SaveLearn
Concerning Hidden MomentumThe fact that the author of an excellent textbook on electromagnetism could be duped by "hidden momentum" vividly illustrates the problematic nature of its use.Timothy H. Boyer·Sep 21, 2007SaveLearn
An Efficient and Simple Analytical Model for Analysis of Propagation Properties in Impedance WaveguidesIn this paper propagation properties of a parallel-plate waveguide with tunable artificial impedance surfaces as sidewalls are studied both analytically and numerically. The impedance surfaces…Olli Luukkonen, Constantin R. Simovski, Antti V. Räisänen et al.·Sep 20, 2007SaveLearn