Resonances in small scatterers with impedance boundaryWith analytical (generalized Mie scattering) and numerical (integral-equation-based) considerations we show the existence of strong resonances in the scattering response of small spheres with…Ari Sihvola, Dimitrios C. Tzarouchis, Pasi Ylä-Oijala et al.·May 22, 2018SaveLearn
Observation of slowly decaying eigenmodes without exceptional points in Floquet, dissipative, synthetic circuitsWe report the first experimental observation of multiple transitions showing the emergence and disappearance of slowly decaying eigenmodes in a dissipative, Floquet electronic system with synthetic…Roberto de J. León-Montiel, Mario A. Quiroz-Juárez, Jorge L. Domínguez-Juárez et al.·May 22, 2018SaveLearn
On physical scattering density fluctuations of amorphous samplesUsing some rigorous results by Wiener [(1930). Acta Math. 30, 118-242] on the Fourier integral of a bounded function and the condition that small-angle scattering intensities of amorphous…Salvino Ciccariello, Piero Riell, A. Benedetti·May 20, 2018SaveLearn
Analytic representation of discrete and continuous mechanical systemsWe investigate how the theory of self-adjoint differential equations alone can be used to provide a satisfactory solution of the inverse vatiational problem. For the discrete system, the self-adjoint…Benoy Talukdar, Supriya Chatterjee, Sekh Golam Ali·May 20, 2018SaveLearn
Non-stationary localized oscillations of an infinite string, with time-varying tension, lying on the Winkler foundation with a point elastic inhomogeneityWe consider non-stationary oscillations of an infinite string with time-varying tension. The string lies on the Winkler foundation with a point inhomogeneity (a concentrated spring of negative…S. N. Gavrilov, E. V. Shishkina, Yu. A. Mochalova·May 18, 2018SaveLearn
Structural discontinuity as generalized strain and Fourier transform for discrete-continuous systemsWe consider a segmented structure, possibly connected with a continuous medium, as initially homogeneous, where discontinuities arise as localized strains induced by self-equilibrated localized…Leonid I. Slepyan·May 17, 2018SaveLearn
Projectile motion: the "coming and going" phenomenonAn interesting phenomenon that occurs in projectile motion, the "coming and going", is analyzed considering linear air resistance force. By performing both approximate and numerical analysis,…Williams J. M. Ribeiro, J. Ricardo de Sousa·May 17, 2018SaveLearn
Resolving Force Indeterminacy in Contact Dynamics Using Compatibility ConditionsContact dynamics (CD) is a powerful method to solve the dynamics of large systems of colliding rigid bodies. CD can be computationally more efficient than classical penalty-based discrete element…Tyler Olsen, Ken Kamrin·May 16, 2018SaveLearn
Radiation Reaction of an accelerating Point Charge: A new ApproachAbraham Lorentz (AL) formula of Radiation Reaction and its relativistic generalization, Abraham Lorentz Dirac (ALD) formula, are valid only for periodic (accelerated) motion of a charged particle,…Nikhil D. Hadap·May 15, 2018SaveLearn
What Current Flows Through a Resistor?Our digital technology depends on mathematics to compute current flow and design its devices. Mathematics describes current flow by an idealization, Kirchhoff's current law. All the electrons…Bob Eisenberg, Nathan Gold, Zilong Song et al.·May 13, 2018SaveLearn
Topological mechanical metamaterial with nonrectilinear constraintsIn this paper we study Maxwell lattices with non-rectilinear constraints, where the elastic energy is determined by the collective motion of three or more particles, in contrast to a rectilinear…Natalia Lera, J. V. Alvarez, Kai Sun·May 11, 2018SaveLearn
Enhancement of Dual-Band Reflection-Mode Circular Polarizers Using Dual-Layer Rectangular Frequency Selective SurfacesA new kind of dual-band reflection-mode circular polarizers (RMCPs) is introduced with wide bandwidth and wide-view at the operating frequencies. The proposed RMCPs are based on dual-layer…Mahdi Fartookzadeh, Seyed Hossein Mohseni Armaki·May 11, 2018SaveLearn
Electromagnetic binding and radiation force reversal on a pair of electrically conducting cylinders of arbitrary geometrical cross-section with smooth and corrugated surfacesThe electromagnetic (EM) radiation force-per-length exerted on a pair of electrically-conducting cylindrical particles of circular and non-circular cross-sections is examined using a formal…F. G. Mitri·May 3, 2018SaveLearn
Vibrations and elastic waves in chiral multi-structuresWe develop a new asymptotic model of the dynamic interaction between an elastic structure and a system of gyroscopic spinners that make the overall multi-structure chiral. An important result is the…Michael Nieves, Giorgio Carta, Ian Jones et al.·May 3, 2018SaveLearn
Radiation from transmission lines PART II: insulated transmission linesWe develop in this work a radiation losses model for Quasi-TEM two-conductors transmission lines insulated in a dielectric material. The analysis is exact, based on Maxwell equations and all the…Reuven Ianconescu, Vladimir Vulfin·May 2, 2018SaveLearn
Self-torque and angular momentum balance for a spinning charged sphereAngular momentum balance is examined in the context of the electrodynamics of a spinning charged sphere, which is allowed to possess any variable angular velocity. We calculate the electric and…Beatrice Bonga, Eric Poisson, Huan Yang·May 1, 2018SaveLearn
Edge-induced radiation force and torque on a cylindrically-radiating active acoustic source near a rigid corner-spaceThis work examines the physical effect of the edge-induced acoustic radiation force and torque on an acoustically radiating circular source, located near a rigid corner. Assuming harmonic (linear)…F. G. Mitri·Apr 30, 2018SaveLearn
Self-ordering induces multiple topological transitions for elastic waves in phononic crystalsTopological defects with symmetry-breaking phase transitions have captured much attention. Vortex generated by topological defects exhibits exotic properties and its flow direction can be switched by…Jiujiu Chen, Hongbo Huang, Shaoyong Huo et al.·Apr 28, 2018SaveLearn
Finding the period of a simple pendulumPendulums have long fascinated humans ever since Galileo theorized that they are isochronic with regards to their swing. While this simplification is useful in the case of small-angle pendulums due…Nicolas Graber-Mitchell·Apr 28, 2018SaveLearn
Multipole expansions for time-dependent charge and current distributions in quasistatic approximationWe propose a consistent approach to the definition of electric, magnetic, and toroidal multipole moments. Electric and magnetic fields are split into potential, vortex, and radiative terms, with the…Yuri Krynytskyi, Andrij Rovenchak·Apr 27, 2018SaveLearn
Experimental demonstration of an anisotropic exceptional pointExceptional points (EPs) associated with a square-root singularity have been found in many non-Hermitian systems. In most of the studies, the EPs found are isotropic meaning that the same singular…Kun Ding, Guancong Ma, Z. Q. Zhang et al.·Apr 25, 2018SaveLearn
Length correction of 2D discontinuities or perforations at large wavelengths and for linear acousticsThis work focuses on the length correction due to radiation effect of a duct discontinuity or at the surface of a perforated plate in the linear acoustic domain and at large wavelengths. Two results…Luc Jaouen, Fabien Chevillotte·Apr 25, 2018SaveLearn
Networks of non-equilibrium condensates for global optimizationRecently several gain-dissipative platforms based on the networks of optical parametric oscillators, lasers, and various non-equilibrium Bose-Einstein condensates have been proposed and realised as…Kirill P. Kalinin, Natalia G. Berloff·Apr 24, 2018SaveLearn
Sparse Identification of Nonlinear Duffing Oscillator From Measurement DataIn this paper we aim to apply an adaptation of the recently developed technique of sparse identification of nonlinear dynamical systems on a Duffing experimental setup with cubic feedback of the…Saeideh Khatiry Goharoodi, Kevin Dekemele, Luc Dupre et al.·Apr 23, 2018SaveLearn
Progressive instability in circular masonry columnsThe instability behaviour of eccentrically loaded circular masonry columns is investigated. Two approaches are considered for the analysis. One is based on a semi-analytical formulation of the…M. Broseghini, P. Zanetti, A. D. Jefferson et al.·Apr 23, 2018SaveLearn