The extrema of an action principle for dissipative mechanical systemsA least action principle for damping motion has been previously proposed with a Hamiltonian and a Lagrangian containing the energy dissipated by friction. Due to the space-time nonlocality of the…Tongling Lin, Qiuping A. Wang·Oct 1, 2013SaveLearn
Status of the Clausius inequality in classical thermodynamicsWe present an analysis of the foundations of the well known Clausius inequality. It is shown that, strictly speaking, the inequality is not a logical consequence of the Kelvin-Planck formulation of…A. V. Gavrilov·Sep 27, 2013SaveLearn
The Paradox of Power Loss in a Lossless Infinite Transmission LineWe discuss here the famous paradox of a continuous power drainage from the source at the input of an otherwise lossless infinite transmission line. The solution of the paradox lies in the realization…Ashok K. Singal·Sep 26, 2013SaveLearn
Role of viscous friction in the reverse rotation of a diskThe mechanical response of a circularly-driven disk in a dissipative medium is considered. We focus on the role played by viscous friction in the spinning motion of the disk, especially on the effect…Pablo de Castro, Fernando Parisio·Sep 24, 2013SaveLearn
The Measurable Q Factor and Observable Energies of Radiating StructuresNew expressions are derived to calculate the Q factor of a radiating device. The resulting relations link Q based on the frequency change of the input impedance at the input port (Qx, Qz) with…M. Capek, L. Jelinek, P. Hazdra et al.·Sep 24, 2013SaveLearn
Dynamical symmetries of the Kepler problemThis work originates from a first year undergraduate research project on hidden symmetries of the dynamics for classical Hamiltonian systems, under the program 'Jovens talentos para a…Marco Cariglia, Eduardo Silva Araújo·Sep 22, 2013SaveLearn
Evolution of Random Wave Fields in the Water of Finite DepthThe evolution of random wave fields on the free surface is a complex process which is not completely understood nowadays. For the sake of simplicity in this study we will restrict our attention to…Denys Dutykh·Sep 22, 2013SaveLearn
Lorentz-invariant three-vectors and alternative formulation of relativistic dynamicsBesides the well known scalar invariants, there exist also vectorial invariants in the realm of special relativity. It is shown that the three-vector $(dpdt)…Krzysztof Rębilas·Sep 19, 2013SaveLearn
Origin of the thermodynamic time arrow demonstrated in a realistic statistical systemEmergence of one-time-direction macroscopic evolution of a classical system of two mixed gases having different temperatures is derived and explained. The analysis performed at the microscopic level,…Krzysztof Rębilas·Sep 19, 2013SaveLearn
Experimental determination of circuit equationsKirchhoff's laws offer a general, straightforward approach to circuit analysis. Unfortunately, use of the laws becomes impractical for all but the simplest of circuits. This work presents a novel…Jason Shulman, Frank Malatino, Matthew Widjaja et al.·Sep 19, 2013SaveLearn
Relative motion in spacetimeIn Minkowski spacetime, we consider an isolated system made of two pointlike bodies interacting at a distance, in the nonradiative approximation. Our framework is the covariant and a priori…Philippe Droz-Vincent·Sep 17, 2013SaveLearn
Anderson Localization Phenomenon in One-dimensional Elastic SystemsThe phenomenon of Anderson localization of waves in elastic systems is studied. We analyze this phenomenon in two different set of systems: disordered linear chains of harmonic oscillators and…R. A. Mendez-Sanchez, L. Gutierrez, A. Morales et al.·Sep 17, 2013SaveLearn
Generation of solutions of the Hamilton-Jacobi equationIt is shown that any function G(qi, pi, t), defined on the extended phase space, defines a one-parameter group of canonical transformations which act on any function f(qi, t), in such a…G. F. Torres del Castillo·Sep 16, 2013SaveLearn
A new versatile in-process monitoring system for millingTool condition monitoring (TCM) systems can improve productivity and ensure workpiece quality, yet, there is a lack of reliable TCM solutions for small-batch or one-off manufacturing of industrial…Mathieu Ritou, Sébastien Garnier, Benoît Furet et al.·Sep 16, 2013SaveLearn
High-performance NC for high-speed machining by means of polynomial trajectoriesThis paper summarises works carried out for defining tool trajectory formats well adapted to High Speed Machining (HSM). Advantages in using native polynomial formats, calculated directly from the…Claire Lartigue, Christophe Tournier, Mathieu Ritou et al.·Sep 15, 2013SaveLearn
Does Information Have Mass?Does information have mass? This question has been asked many times and there are many answers even on the Internet, including on Yahoo Answers. Usually the answer is "no". Attempts have been…Laszlo B. Kish, Claes-Goran Granqvist·Sep 14, 2013SaveLearn
Derivation of the Love equation for the charge density of a circular plate condenserThe electrostatic problem of two coaxial parallel charged disks of different radii in infinite space is solved by expansion in terms of complex potentials. For perfectly conducting disks a pair of…B. U. Felderhof·Sep 14, 2013SaveLearn
Initial versus tangent stiffness-based Rayleigh damping in inelastic time history seismic analysesIn the inelastic time history analyses of structures in seismic motion, part of the seismic energy that is imparted to the structure is absorbed by the inelastic structural model, and Rayleigh…Pierre Jehel, Pierre Léger, Adnan Ibrahimbegovic·Sep 11, 2013SaveLearn
Omnidirectional broadband insulating device for flexural waves in thin platesThis work presents a gradient index device for insulating from vibrations a circular area of a thin plate. The gradient of the refractive index is achieved by locally changing the thickness of the…Alfonso Climente, Daniel Torrent, José Sánchez-Dehesa·Sep 10, 2013SaveLearn
Magnetohydrodynamic simulations of the elliptical instability in triaxial ellipsoidsThe elliptical instability can take place in planetary cores and stars elliptically deformed by gravitational effects, where it generates large-scale three-dimensional flows assumed to be dynamo…David Cébron, Michael Le Bars, Pierre Maubert et al.·Sep 8, 2013SaveLearn
Is the mean free path the mean of a distribution?We bring attention to the fact that Maxwell's mean free path for a dilute hard-sphere gas in thermal equilibrium, (2σn)-1, which is ordinarily obtained by multiplying the average…Steve T. Paik·Sep 4, 2013SaveLearn
Interferometry with relativistic electronsWe propose an experiment to test the influence of Lorentz contraction on the interference pattern of a beam of electrons. The electron beam is split and recombined by two pairs of bi-chromatic laser…Karl-Peter Marzlin, Thomas Lee·Sep 4, 2013SaveLearn
Efficient binary tomographic reconstructionTomographic reconstruction of a binary image from few projections is considered. A novel heuristic algorithm is proposed, the central element of which is a nonlinear transformation…Stephane Roux, Hugo Leclerc, François Hild·Sep 4, 2013SaveLearn
Inhomogeneous Spatially Dispersive Electromagnetic MediaTwo key types of inhomogeneous spatially dispersive media are described, both based on a spatially dispersive generalisation of the single resonance model of permittivity. The boundary conditions for…Jonathan Gratus, Matthew McCormack·Sep 3, 2013SaveLearn
Diffraction of light by a nanowireA general scattering problem of a plane electromagnetic wave on an infinite cylindrical rod is formulated and solved in a form of Bessel functions series expansion. The conductivity account via Ohm…Katarzyna Krzyżanowska, Sergey Leble·Aug 31, 2013SaveLearn