Dynamics of spectrally truncated inviscid turbulenceThe evolution of the turbulent energy spectrum for the inviscid spectrally truncated Euler equations is studied by closure calculations. The observed behavior is similar to the one found in direct…Wouter J. T. Bos, Jean-Pierre Bertoglio·Dec 17, 2007SaveLearn
Spectral imbalance and the normalized dissipation rate of turbulenceThe normalized turbulent dissipation rate Cε is studied in decaying and forced turbulence by direct numerical simulations, large-eddy simulations, and closure calculations. A large difference in…Wouter J. T. Bos, L. Shao, Jean-Pierre Bertoglio·Dec 17, 2007SaveLearn
Directive Emission Obtained by Coordinate TransformationWe use coordinate transformation theory to realize substrates that can modify the emission of an embedded source. Simulation results show that with proper transformation functions the energy radiated…Jingjing Zhang, Yu Luo, Hongsheng Chen et al.·Dec 17, 2007SaveLearn
Three dimensional image correlation from X-Ray computed tomography of solid foamA new methodology is proposed to estimate 3D displacement fields from pairs of images obtained from X-Ray Computed Micro Tomography (XCMT). Contrary to local approaches, a global approach is followed…Stephane Roux, François Hild, Philippe Viot et al.·Dec 17, 2007SaveLearn
A preliminary study of asymmetric vocal fold vibrations: modeling and "in-vitro" validationThis paper deals with some of aspects of the influence of asymmetry on vocal folds vibrations. A theoretical model of vocal fold asymmetry is presented. The influence of asymmetry is quantitatively…Nicolas Ruty, Annemie Van Hirtum, Xavier Pelorson et al.·Dec 7, 2007SaveLearn
Iterative Methods for Model Reduction by Domain DecompositionWe propose a method to reduce the computational effort to solve a partial differential equation on a given domain. The main idea is to split the domain of interest in two subdomains, and to use…Marcelo Buffoni, Haysam Telib, Angelo Iollo·Dec 5, 2007SaveLearn
Extended symmetrical classical electrodynamicsIn the present article, we discuss a modification of classical electrodynamics in which ``ordinary'' point charges are absent. The modified equations contain additional terms describing the…A. V. Fedorov, E. G. Kalashnikov·Dec 5, 2007SaveLearn
Improved Time Domain Method to Measure Near-Field Distribution of Buried-ObjectThe paper analyses the ground antenna echo using microwave frequency detector and high speed sampling technology and a new method detecting buried object in time domain near-field is presented. The…Li-Ming Si·Dec 3, 2007SaveLearn
Incremental Magnetoelastic Deformations, with Application to Surface InstabilityIn this paper the equations governing the deformations of infinitesimal (incremental) disturbances superimposed on finite static deformation fields involving magnetic and elastic interactions are…Mélanie Otténio, Michel Destrade, Raymond W. Ogden·Dec 3, 2007SaveLearn
The stress field in a pulled cork and some subtle points in the semi-inverse method of nonlinear elasticityIn an attempt to describe cork-pulling, we model a cork as an incompressible rubber-like material and consider that it is subject to a helical shear deformation superimposed onto a shrink fit and a…Riccardo De Pascalis, Michel Destrade, Giuseppe Saccomandi·Dec 3, 2007SaveLearn
Magnetic Flux Diffusion and Expulsion with Thin Conducting SheetsWe present visualizations of the diffusion and expulsion of magnetic flux for thin conducting sheets, both stationary and moving, including representations of the eddy currents and of the associated…Yao Liu, John Belcher·Dec 2, 2007SaveLearn
Increase of Thermal Resistance Between a Nanostructure and a Surface due to Phonon MultireflectionsThe thermal resistance between a nanostructure and a half-body is calculated in the framework of particle-phonons physics. The current models approximate the nanostructure as a thermal bath. We prove…S. Volz, P. -O. Chapuis·Nov 29, 2007SaveLearn
Temperature measurement of sub-micrometric ICs by scanning thermal microscopySurface temperature measurements were performed with a Scanning Thermal Microscope mounted with a thermoresistive wire probe of micrometrSurface temperature measurements were performed with a…S. Gomès, Po Chapuis, F. Nepveu et al.·Nov 28, 2007SaveLearn
Relativistic energy of a moving spherical capacitorWe discuss the relativistic transformation of the energy of a charged spherical capacitor. The energy stored in the electromagnetic fields observed by an uniformly moving frame is related to that of…Nelson R. F. Braga, Gustavo Sophia·Nov 28, 2007SaveLearn
Weierstrass's criterion and compact solitary wavesWeierstrass's theory is a standard qualitative tool for single degree of freedom equations, used in classical mechanics and in many textbooks. In this Brief Report we show how a simple…Michel Destrade, Giuseppe Gaeta, Giuseppe Saccomandi·Nov 28, 2007SaveLearn
The number of dimensional fundamental constantsWe revisit, qualify, and objectively resolve the seemingly controversial question about what is the number of dimensional fundamental constants in Nature. For this purpose, we only assume that all we…George E. A. Matsas, Vicente Pleitez, Alberto Saa et al.·Nov 27, 2007SaveLearn
On the existence of Hamiltonians for non-holonomic systemsWe consider the question of existence of Hamiltonians for autonomous non-holonomic mechanical systems in this paper. The approach is elementary in the sense that the existence of a Hamiltonian for a…Christofer Cronstrom, Tommi Raita·Nov 26, 2007SaveLearn
A primer on elliptic functions with applications in classical mechanicsThe Jacobi and Weierstrass elliptic functions used to be part of the standard mathematical arsenal of physics students. They appear as solutions of many important problems in classical mechanics: the…Alain J. Brizard·Nov 26, 2007SaveLearn
Improving the reliability of material databases using multiscale approachesThis article addresses the propagation of constitutive uncertainties between scales occurring in the multiscale modelling of fibre-reinforced composites. The amplification of such uncertainties…Y. Rollet, M. Bonnet, N. Carrère et al.·Nov 25, 2007SaveLearn
Some results on ideal impacts of billiard ballsWe analyze the impact of two equal billiard balls in three ideal situations: when the balls freely slide on the plane of the billiard, when they roll without sliding and when one of them freely…Stefano Pasquero·Nov 23, 2007SaveLearn
In-situ observation of a soap film catenoid - a simple educational physics experimentThe solution to the Euler-Lagrange equation is an extremal functional.To understand that the functional is stationary at local extrema (maxima or minima), we propose a physics experiment that…Masato Ito, Taku Sato·Nov 21, 2007SaveLearn
On Constructing the Analytical Solutions for Localizations in a Slender Cylinder Composed of an Incompressible Hyperelastic MaterialIn this paper, we study the localization phenomena in a slender cylinder composed of an incompressible hyperelastic material subjected to axial tension. We aim to construct the analytical solutions…Huihui Dai, Yanhong Hao, Zhen Chen·Nov 19, 2007SaveLearn
Fractional StabilityA fractional generalization of variations is used to define a stability of non-integer order. Fractional variational derivatives are suggested to describe the properties of dynamical systems at…Vasily E. Tarasov·Nov 14, 2007SaveLearn
Product ecodesign and materials: current status and future prospectsThe aim of this paper is to discuss the current status of ecodesign in the industry and its future implications for materials. There is today more and more focus on the environmental impacts of…Fabrice Mathieux, Daniel Brissaud, Peggy Zwolinski·Nov 12, 2007SaveLearn