Modelization of flow electrification in a polymer meltFlow electrification of polymer melts is an important side effect of polymer processing. The studies dealing with this phenomenon are seldom and most of the scientific work has been focused on flow…F. Flores, D. Graebling, A. Allal et al.·Jul 18, 2007SaveLearn
Surface oscillations in channeled snow flowsAn experimental device has been built to measure velocity profiles and friction laws in channeled snow flows. The measurements show that the velocity depends linearly on the vertical position in the…Marie Rastello, Alexi Bouchet·Jul 17, 2007SaveLearn
Sound beyond the speed of light: destructive interference, anomalous dispersion and nonlocality of near fieldExperimentally fixed sound pulse beyond of light speed in the region of anomalous dispersion [W. M. Robertson, e. a. Appl. Phys. Lett, 90, 014102 (2007)] can be explained, as well as the similar…M. E. Perel'man·Jul 11, 2007SaveLearn
Microwave whirlpools in a rectangular-waveguide cavity with a thin ferrite diskWe study a three dimensional system of a rectangular-waveguide resonator with an inserted thin ferrite disk. The interplay of reflection and transmission at the disk interfaces together with material…E. O. Kamenetskii, Michael Sigalov, Reuven Shavit·Jul 9, 2007SaveLearn
Effective chiral magnetic currents, topological magnetic charges, and microwave vortices in a cavity with an enclosed ferrite diskIn microwaves, a TE-polarized rectangular-waveguide resonator with an inserted thin ferrite disk gives an example of a nonintegrable system. The interplay of reflection and transmission at the disk…Michael Sigalov, E. O. Kamenetskii, Reuven Shavit·Jul 9, 2007SaveLearn
On the boundary-value problems and the validity of the Post constraint in modern electromagnetismWe recall that the theory of electromagnetism consists of three building blocks: (a) the inhomogeneous Maxwell equations for the electric and magnetic excitations (D,H) (which reflects charge…Yuri N. Obukhov, Friedrich W. Hehl·Jul 7, 2007SaveLearn
Systematic approximations for the period of a finite amplitude pendulumThe standard series expansion for the period of a finite amplitude pendulum as a function of energy (and hence amplitude) provides a lower limit on the period when the series is truncated. An…Ian R. Gatland·Jul 6, 2007SaveLearn
Scaling Symmetries of Scatterers of Classical Zero-Point RadiationClassical radiation equilibrium (the blackbody problem) is investigated by the use of an analogy. Scaling symmetries are noted for systems of classical charged particles moving in circular orbits in…Timothy H. Boyer·Jul 6, 2007SaveLearn
A new concept and design of ferrite-based microwave vortex devicesIn microwave resonant systems with ferrite samples, one becomes faced with specific phase relations for the electromagnetic fields. Such specific phase relations may lead to appearance of nontrivial…M. Sigalov, E. Kamenetskii, R. Shavit·Jul 3, 2007SaveLearn
Transmission-line networks cloaking objects from electromagnetic fieldsWe consider a novel method of cloaking objects from the surrounding electromagnetic fields in the microwave region. The method is based on transmission-line networks that simulate the wave…Pekka Alitalo, Olli Luukkonen, Liisi Jylhä et al.·Jun 29, 2007SaveLearn
Effect of hydrostatic pressure on elastic properties of ZDTP tribofilmsPrevious studies have shown that the elastic properties of Zinc Dialkyl-dithiophosphate (ZDTP) tribofilms measured by nanoindentation increase versus applied pressure (Anvil effect) [1, 2]. The aim…Karim Demmou, Sandrine Bec, Jean-Luc Loubet·Jun 28, 2007SaveLearn
Transmission des forces dans un milieu composé de grains non sphériquesWe perform a detailed analysis of the contact force network in a dense confined packing of pentagonal particles simulated by means of the contact dynamics method. The effect of particle shape is…Émilien Azema, F. RadjaÏ, R. Peyroux et al.·Jun 27, 2007SaveLearn
Free and smooth boundaries in 2-D finite-difference schemes for transient elastic wavesA method is proposed for accurately describing arbitrary-shaped free boundaries in single-grid finite-difference schemes for elastodynamics, in a time-domain velocity-stress framework. The basic idea…Bruno Lombard, Joël Piraux, Céline Gélis et al.·Jun 26, 2007SaveLearn
Axiomatic Foundations for the Principle of Entropy IncreaseWe show that the principle of entropy increase may be exactly founded on a few axioms valid not only for quantum and classical statistics, but also for a wide range of statistical processes.Qi-Ren Zhang·Jun 24, 2007SaveLearn
A dynamical law for slow crack growth in polycarbonate filmsWe study experimentally the slow growth of a single crack in polycarbonate films submitted to uniaxial and constant imposed stress. For this visco-plastic material, we uncover a dynamical law that…Pierre-Philippe Cortet, Loic Vanel, Sergio Ciliberto·Jun 24, 2007SaveLearn
Motion of Hexagonal Pencil on an Inclined PlaneThis paper has been withdrawn by the author(s), due a crucial sign error in Eqn. 1.Amin Rezaeezadeh·Jun 23, 2007SaveLearn
Relativity tests by complementary rotating Michelson-Morley experimentsWe report Relativity tests based on data from two simultaneous Michelson-Morley experiments, spanning a period of more than one year. Both were actively rotated on turntables. One (in Berlin,…Holger Mueller, Paul Louis Stanwix, Michael Edmund Tobar et al.·Jun 14, 2007SaveLearn
Quantum electrodynamics and experiment demonstrate the non-retarded nature of electrodynamical force fieldsIn quantum electrodynamics, the quantitatively most successful theory in the history of science, intercharge forces obeying the inverse square law are due to the exchange of space-like virtual…J. H. Field·Jun 12, 2007SaveLearn
Comment on the paper by Rovelli & al. about the compatibility of various "gauge conditions"The compatibility "demonstrated" by Rovelli & al. between various "gauge conditions" both in Classical Electromagnetism and General Relativity can be better understood if one…Germain Rousseaux·Jun 12, 2007SaveLearn
Transfer matrices for piecewise constant potentialsBy expressing the time-independent Schrodinger equation in one dimension as a system of two first-order differential equations, the transfer matrix for a rectangular potential barrier is obtained…G. F. Torres del Castillo, I. Rubalcava Garcia·Jun 7, 2007SaveLearn
Saturation effects in the sub-Doppler spectroscopy of Cesium vapor confined in an Extremely Thin CellSaturation effects affecting absorption and fluorescence spectra of an atomic vapor confined in an Extremely Thin Cell (cell thickness L < 1 μm) are investigated experimentally and theoretically.…C. Andreeva, S. Cartaleva, L. Petrov et al.·Jun 6, 2007SaveLearn
Magnetic noise around metallic microstructuresWe compute the local spectrum of the magnetic field near a metallic microstructure at finite temperature. Our main focus is on deviations from a plane-layered geometry for which we review the main…Bo Zhang, Carsten Henkel·Jun 5, 2007SaveLearn
Nonstationary random acoustic and electromagnetic fields as wave diffusion processesWe investigate the effects of relatively rapid variations of the boundaries of an overmoded cavity on the stochastic properties of its interior acoustic or electromagnetic field. For quasi-static…L. R. Arnaut·Jun 4, 2007SaveLearn
Oscillation thresholds for "strinking outwards" reeds coupled to a resonatorThis paper considers a "striking outwards" reed coupled to a resonator. This expression, due to Helmholtz, is not discussed here : it corresponds to the most common model of a lip-type valve,…Fabrice Silva, Jean Kergomard, Christophe Vergez·May 29, 2007SaveLearn
Use of a differential pressure transducer for the monitoring of soil volume change in cyclic triaxial test on unsaturated soilsA new experimental set-up using a differential pressure transducer was developed, that enables the monitoring of volume changes in cyclic triaxial tests on unsaturated soils. Calibration tests were…Yu-Jun Cui, Anh-Minh Tang, Duilio Marcial et al.·May 28, 2007SaveLearn