Generalized Galilean transformations of tensors and cotensors with application to general fluid motionGalilean transformation properties of different physical quantities are investigated from the point of view of four dimensional Galilean relativistic (non-relativistic) space-time. The objectivity of…Peter Ván, Vincenzo Ciancio, Liliana Restuccia·Aug 20, 2016SaveLearn
A Conic Section Approach to the Relativistic Reflection LawWe consider the reflection of light, from a stationary source, off of a uniformly moving flat mirror, and derive the relativistic reflection law using well-known properties of conic sections. The…Mohsen Maesumi·Aug 19, 2016SaveLearn
Acoustic one-way mode conversion and transmission by sonic crystal waveguidesWe proposed a scheme to achieve one-way acoustic propagation and even odd mode switching in two mutually perpendicular sonic crystal waveguides connected by a resonant cavity. The even mode in the…Shiliang Ouyang, Hailong He, Zhaojian He et al.·Aug 19, 2016SaveLearn
Electromagnetic Boundaries with PEC/PMC EquivalenceThe most general electromagnetic boundary, defined by linear and local boundary conditions, is defined in terms of conditions which can be called generalized impedance boundary conditions. Requiring…Ismo V. Lindell, Ari Sihvola·Aug 19, 2016SaveLearn
An action principle of classical irreversible thermodynamics - Irreversible thermodynamic cycles and embodied bits of informationDespite its simplicity, it seems to my best of knowledge that the possibly simplest approach towards deriving equations governing irreversible thermodynamics from gas-kinetic considerations within…Rudolf A. Hanel·Aug 17, 2016SaveLearn
Ray and wave scattering in smoothly curved thin shell cylindrical ridgesWe propose wave and ray approaches for modelling mid- and high- frequency structural vibrations through smoothed joints on thin shell cylindrical ridges. The models both emerge from a simplified…Niels Sondergaard, David Chappell·Aug 16, 2016SaveLearn
Mechanical energy and mean equivalent viscous damping for SDOF fractional oscillatorsThis paper addresses the total mechanical energy of a single degree of freedom fractional oscillator. Based on the energy storage and dissipation properties of the Caputo fractional derivatives, the…Jian Yuan, Bao Shi, Mingjiu Gai et al.·Aug 14, 2016SaveLearn
Fundamental limitations for antenna radiation efficiencySmall volume, finite conductivity and high frequencies are major imperatives in the design of communications infrastructure. The radiation efficiency ηr impacts on the optimal gain, quality…Morteza Shahpari, David V. Thiel·Aug 13, 2016SaveLearn
Topological transport of sound mediated by spin-redirection geometric phaseWhen a dynamic system undergoes a cyclic evolution, a geometric phase that depends only on the path traversed in parameter space can arise in addition to the normal dynamical phase. These geometric…Shubo Wang, Guancong Ma, C. T. Chan·Aug 13, 2016SaveLearn
3D Single-port Labyrinthine Acoustic MetamaterialIn this paper, we report on the design, fabrication, and experimental characterization of a 3D single-port labyrinthine acoustic metamaterial. By using curled perforations with one end closed and…Chi Zhang, Xinhua Hu·Aug 11, 2016SaveLearn
Active cloaking for clusters of pins in thin platesThis paper considers active cloaking of a square array of evenly spaced pins in a Kirchhoff plate in the presence of flexural waves. Active sources are distributed exterior to the cluster and are…Jane O'Neill, Ozgur Selsil, Stewart Haslinger et al.·Aug 10, 2016SaveLearn
On the nature of discrete space-time: The atomic theory of space-time and its effects on Pythagoras's theorem, time versus duration, inertial anomalies of astronomical bodies, and special relativity at the Planck scaleIn this work, resolutions will be given for commonly stated problems associated with a model that assumes that space and time are discretized (i.e., atomized). This model is in contrast to the…David T Crouse·Aug 9, 2016SaveLearn
Divergence of Electric Field of Continuous and of a Point Charge for Relativistic and non-Relativistic MotionIn this paper we considered divergence of electric and of magnetic fields for four cases: classical point charge, classical continuous charge, relativistic point and relativistic continuous charges.…Altay Zhakatayev·Aug 9, 2016SaveLearn
Analytical solution to the Riemann problem of 1D elastodynamics with general constitutive lawsUnder the hypothesis of small deformations, the equations of 1D elastodynamics write as a 2 x 2 hyperbolic system of conservation laws. Here, we study the Riemann problem for convex and nonconvex…H Berjamin, B Lombard, G Chiavassa et al.·Aug 9, 2016SaveLearn
Broadband cloaking for flexural wavesThe governing equation for elastic waves in flexural plates is not form invariant, and hence designing a cloak for such waves faces a major challenge. Here, we present the design of a perfect…Ahmad Zareei, Mohammad-Reza Alam·Aug 8, 2016SaveLearn
Metamaterial bricks and quantization of meta-surfacesControlling acoustic fields is crucial in diverse applications such as loudspeaker design, ultrasound imaging and therapy, or acoustic particle manipulation. The current approaches use fixed lenses…Gianluca Memoli, Mihai Caleap, Michihiro Asakawa et al.·Aug 5, 2016SaveLearn
Superresolution through the topological shaping of sound with an acoustic vortex wave antennaIn this paper, we demonstrate far-field acoustic superresolution using shaped acoustic vortices. Compared with previously proposed near-field methods of acoustic superresolution, in this work we…Matthew D. Guild, Christina J. Naify, Theodore P. Martin et al.·Aug 5, 2016SaveLearn
A New Energy Conservation Law for Time-Harmonic Electromagnetic Fields and Its ApplicationsWe report a new energy conservation law for time-harmonic electromagnetic fields, which is valid for an arbitrary medium. In contrast to the well-established Poynting theorem for time-harmonic…Wen Geyi·Aug 4, 2016SaveLearn
An elementary approach to electromagnetic momentum in matterWe present an elementary discussion of the momentum transferred to a conducting sheet by an electromagnetic wave propagating in a polarizable medium. We show that conservation of momentum is…Rodrigo Medina, J. Stephany·Aug 2, 2016SaveLearn
Tilted resonators in a triangular elastic lattice: chirality, Bloch waves and negative refractionWe consider a vibrating triangular mass-truss lattice whose unit cell contains a resonator of a triangular shape. The resonators are connected to the triangular lattice by trusses. Each resonator is…Domenico Tallarico, Natalia V. Movchan, Alexander B. Movchan et al.·Aug 2, 2016SaveLearn
A Necessary and Sufficient Condition for Having Independent TE and TM Modes in an Anisotropic WaveguideWhether there exist independent transverse electric (TE) and transverse magnetic (TM) modes in a metallic waveguide filled with an anisotropic medium is a fundamental question in electromagnetics…Wei Jiang, Jie Liu, Qin Li et al.·Aug 2, 2016SaveLearn
An axiomatic approach to Maxwell's equationsThis paper suggests an axiomatic approach to Maxwell's equations. The basis of this approach is a theorem formulated for two sets of functions localized in space and time. If each set satisfies a…José A. Heras·Aug 2, 2016SaveLearn
Radiation from structured-ring resonatorsWe investigate the scalar-wave resonances of systems composed of identical Neumann-type inclusions arranged periodically around a circular ring. Drawing on natural similarities with the undamped…B. Maling, O. Schnitzer, R. V. Craster·Aug 1, 2016SaveLearn
Extremely High Q-factor metamaterials due to Anapole ExcitationWe demonstrate that ideal anapole metamaterials have infinite Q-factor. We have designed and fabricated a metamaterial consisting of planar metamolecules which exhibit anapole behavior in the sense…Alexey A. Basharin, Vitaly Chuguevsky, Nikita Volsky et al.·Jul 30, 2016SaveLearn
A new look on the stabilization of inverted pendulum with parametric excitation and large random frequencies: analytical and numerical approachesIn this paper we explore the stability of an inverted pendulum with generalized parametric excitation described by a superposition of N sines with different frequencies and phases. We show that…Roberto da Silva, Sandra D. Prado, Henrique A. Fernandes·Jul 29, 2016SaveLearn