Estimations of non-linearities in structural vibrations of string musical instrumentsUnder the excitation of strings, the wooden structure of string instruments is generally assumed to undergo linear vibrations. As an alternative to the direct measurement of the distortion rate at…Kerem Ege, Marc Rébillat, Xavier Boutillon·Oct 15, 2012SaveLearn
Comparison of the vibroacoustical characteristics of different pianosOn the basis of a recently proposed vibro-acoustical model of the piano soundboard (X. Boutillon and K. Ege, Vibroacoustics of the piano soundboard: reduced models, mobility synthesis, and acoustical…Xavier Boutillon, Kerem Ege, Stephen Paulello·Oct 15, 2012SaveLearn
On the magnetic dipole energy expression of an arbitrary current distributionWe show that the magnetic dipole energy term appearing in the expansion of the magnetic potential energy of a localized current distribution has the form U= + m · B which is wrong by…Keeyung Lee·Oct 15, 2012SaveLearn
Variational electrodynamics of AtomsWe generalize Wheeler-Feynman electrodynamics by the minimization of a finite action functional defined for variational trajectories that are required to merge continuously into given past and future…Jayme De Luca·Oct 14, 2012SaveLearn
Variations on the adiabatic invariance: the Lorentz pendulumWe analyze a very simple variant of the Lorentz pendulum, in which the length is varied exponentially, instead of uniformly, as it is assumed in the standard case. We establish quantitative criteria…Luis L. Sanchez-Soto, J. Zoido·Oct 14, 2012SaveLearn
Tidal interactions and principle of corresponding states: from micro to macro cosmos. A century after van der Waals' Nobel PrizeThe current attempt is aimed to honor the first centennial of Johannes Diderik van der Waals (VDW) awarding Nobel Prize in Physics. The VDW theory of ordinary fluids is reviewed in the first part of…R. Caimmi·Oct 13, 2012SaveLearn
Experimental estimations of viscoelastic properties of multilayer damped plates in broad-band frequency rangeRegarding lightweighting structures for aeronautics, automotive or construction applications, the level of performance of solutions proposed in terms of damping and isolation is fundamental. Hence…Kerem Ege, Thibault Boncompagne, Bernard Laulagnet et al.·Oct 11, 2012SaveLearn
Flute-Model Acoustic Metamaterials with Simultaneously Negative Bulk Modulus and Mass DensityWe experimentally constructed a three-dimensional flute-model "molecular" structure acoustic metamaterial(AM)from a periodic array of perforated hollow steel tubes (PHSTs) and investigated…H. C. Zeng, C. R. Luo, H. J. Chen et al.·Oct 9, 2012SaveLearn
Exact computations of the acoustic radiation force on a sphere using the translational addition theoremIn this paper, the translational addition theorem for spherical functions is employed to exactly calculate the acoustic radiation force produced by an arbitrary shaped beam on a sphere suspended in…Glauber T. Silva, André L. Baggio, J. Henrique Lopes et al.·Oct 7, 2012SaveLearn
Analytical mechanics of a relativistic particle in a positional potentialWe propose a form for the action of a relativistic particle subject to a positional force that is invariant under time reparametrization and therefore allows for a consistent Hamiltonian formulation…S. Mignemi·Oct 7, 2012SaveLearn
Two Models Relevant to the Interaction of a Point Charge and a Magnetic MomentAn understanding of the interaction of a point charge and a magnetic moment is crucial for understanding the experiments involving electromagnetic momentum carried by permeable materials as well as…Timothy H. Boyer·Oct 5, 2012SaveLearn
A time-domain numerical method for Biot-JKD poroelastic waves in 2D heterogeneous mediaAn explicit finite-difference scheme is presented for solving the two-dimensional Biot equations of poroelasticity across the full range of frequencies. The key difficulty is to discretize the…Emilie Blanc, Guillaume Chiavassa, Bruno Lombard·Oct 1, 2012SaveLearn
The full energy regularization of point charge in classical electrodynamicsConvergence of the full energy (mass) of point charged particle by means of direct calculation is proved. The consideration is based on the strict solutions of nonlinear equations system of…A. Serdyukov, A. Yegorov·Sep 30, 2012SaveLearn
Separation of Potentials in the Two-Body ProblemIn contrast to the well-known solution of the two-body problem through the use of the concept of reduced mass, a solution is proposed involving separation of potentials. It is shown that each of the…Andrey Vasilyev·Sep 28, 2012SaveLearn
Double-negative acoustic metamaterial based on hollow steel tube meta-atomWe presented an acoustic 'meta-atom' model of hollow steel tube (HST). The simulated and experimental results demonstrated that the resonant frequency is closely related to the length of the…Huaijun Chen, Hongcheng Zeng, Changlin Ding et al.·Sep 27, 2012SaveLearn
Charged particles constrained to a curved surfaceWe study the motion of charged particles constrained to arbitrary two-dimensional curved surfaces but interacting in three-dimensional space via the Coulomb potential. To speed-up the interaction…Thomas Müller, Jörg Frauendiener·Sep 19, 2012SaveLearn
Nonlinear interaction of torsional and longitudinal guided waves in hyperelastic cylindersThe nonlinear forcing terms for the wave equation in general curvilinear coordinates are derived based on a hyperelastic material. The expressions for the nonlinear part of the first Piola-Kirchhoff…Yang Liu, Ehsan Khajeh, Cliff J. Lissenden et al.·Sep 16, 2012SaveLearn
Technical Notes on Classical Electromagnetism, with exercisesThe present technical notes offer a brief summary of the essential points of electromagnetism at the undergraduate physics level. Some problems are presented at the end of each section; those with…Christine C. Dantas·Sep 14, 2012SaveLearn
Evaluating transport in irregular pore networksA general approach for investigating transport phenomena in porous media is presented. This approach has the capacity to represent various kinds of irregularity in porous media without the need for…Dimitri A. Klimenko, Kamel Hooman, Alexander Y. Klimenko·Sep 13, 2012SaveLearn
Adapting the Euler-Lagrange equation to study one-dimensional motions under the action of a constant forceThe Euler-Lagrange equations (EL) are very important in the theoretical description of several physical systems. In this work we have used a simplified form of EL to study one-dimensional motions…Clenilda F Dias, Vagson L Carvalho-Santos·Sep 11, 2012SaveLearn
Special solutions to a compact equation for deep-water gravity wavesRecently, Dyachenko & Zakharov (2011) have derived a compact form of the well known Zakharov integro-differential equation for the third order Hamiltonian dynamics of a potential flow of an…Francesco Fedele, Denys Dutykh·Sep 11, 2012SaveLearn
Obtaining Maxwell's equations heuristicallyStarting from the experimental fact that a moving charge experiences the Lorentz force and applying the fundamental principles of simplicity (first order derivatives only) and linearity…Gerhard Diener, Jürgen Weissbarth, Frank Grossmann et al.·Aug 31, 2012SaveLearn
Guided Wave Propagation in Complex Curved Waveguides I: Method Introduction and VerificationA phenomenological method is developed to consider elastic guided wave propagation in complex curved waveguides. The theory on guided wave propagation in hollow circular cylinders is used in order to…E. Khajeh, L. Breon, J. L. Rose·Aug 30, 2012SaveLearn
Lift-off dynamics in a simple jumping robotWe study vertical jumping in a simple robot comprising an actuated mass-spring arrangement. The actuator frequency and phase are systematically varied to find optimal performance. Optimal jumps occur…Jeffrey Aguilar, Alex Lesov, Kurt Wiesenfeld et al.·Aug 30, 2012SaveLearn
Classical MechanicsThese notes provide an introduction to a number of those topics in Classical Mechanics that are useful for field theory.D. G. C. McKeon·Aug 27, 2012SaveLearn