Electrical and Thermal Conductivity of Complex-Shaped Contact SpotsThis paper explores the electrical and thermal conductivity of complex contact spots on the surface of a half-space. Employing an in-house Fast Boundary Element Method implementation, various complex…Paul Beguin, Vladislav A. Yastrebov·Nov 24, 2023SaveLearn
On the normal modes of coupled harmonic oscillatorsWe discuss in detail a well known method for obtaining the frequencies of the normal modes of coupled harmonic oscillators that is based on the simultaneous diagonalization of two symmetric matrices.…Francisco M. Fernández·Nov 20, 2023SaveLearn
Dynamic Instability of Follower Forced Euler Bernoulli Cantilever Beam With Tip MassThis work focuses on the stability analysis of an Euler Bernoulli cantilever beam with a tip mass at the free end, subject to a follower force. This can serve as a viable model for analysis of…Premjit Saha, Tarunraj Singh·Nov 17, 2023SaveLearn
Stress and power as a response to harmonic excitation of a fractional anti-Zener and Zener type viscoelastic bodyThe stress as a response to strain prescribed as a harmonic excitation is examined in both transient and steady state regime for the viscoelastic body modeled by thermodynamically consistent…Slađan Jelić, Dušan Zorica·Nov 16, 2023SaveLearn
The Foucault Pendulum: Trajectories of the Full LagrangianThe Foucault Pendulum is a Spherical Pendulum of fixed length with two angular degrees of freedom, attached to a suspension which rotates once a day around the Earth axis at a distance essentially…Richard J. Mathar·Nov 15, 2023SaveLearn
Enhanced classical radiation damping of electronic cyclotron motion in the vicinity of the Van Hove singularity in a waveguideWe study the damping process of electron cyclotron motion and the resulting emission in a waveguide using the classical Friedrichs model without relying on perturbation analysis such as Fermi's…Yuki Goto, Savannah Garmon, Tomio Petrosky·Nov 14, 2023SaveLearn
Electromagnetics with time-varied vacuum permittivity and permeabilityMaxwell equations provide a complete description of the electromagnetic (EM) phenomena, which have been one of the key fundamental-theories of modern physics, such as electromagnetism, optics,…Zhiwei Sun·Nov 14, 2023SaveLearn
A method to estimate the rectangular orthotropic plate elastic constants using least-squares and Chladni patternsA method to retrieve the elastic constants of rectangular wooden plates is presented, relying on the measurement of a set of eigenfrequencies and the identification of the corresponding mode shapes,…Michele Ducceschi, Sebastian Duran, Henna Tahvanainen et al.·Nov 12, 2023SaveLearn
There is no 'velocity kick' memory in electrodynamicsThe memory effect in electrodynamics, as discovered in 1981 by Staruszkiewicz, and also analysed later, consists of adiabatic shift of the position of a test particle. The proposed 'velocity…Andrzej Herdegen·Nov 10, 2023SaveLearn
Magnetostatic waves in metallic rectangular waveguides filled with uniaxial negative permeability mediaThe propagation characteristics of magneto-quasistatic waves, more commonly, known as magnetostatic waves in a long, metallic rectangular waveguide filled with a metamaterial slab are comprehensively…Afshin Moradi, Mohammed M. Bait-Suwailam·Nov 9, 2023SaveLearn
Statistical analysis of coupled oscillations with a single fixed endpoint and its application to carbon nanomaterialsSquared deviations from the equilibrium positions of one-dimensional coupled harmonic oscillators with fixed and free endpoints are calculated, and the time averages are expressed as a function of…Norio Inui·Nov 8, 2023SaveLearn
Complete set of bounds for the technical moduli in 3D anisotropic elasticityThe paper addresses the problem of finding the necessary and sufficient conditions to be satisfied by the engineering moduli of an anisotropic material for the elastic energy to be positive for each…Paolo Vannucci·Nov 5, 2023SaveLearn
The continuum limit of k-space cavity angular momentum is controlled by an infinite range difference operatorA wavepacket (electromagnetic or otherwise) within an isotropic and homogeneous space can be quantized on a regular lattice of discrete k-vectors. Each k-vector is associated with a temporal…Per Kristen Jakobsen, Masud Mansuripur·Nov 3, 2023SaveLearn
Free-Space Propagation and Skyrmion Topology of Toroidal Electromagnetic PulsesToroidal electromagnetic pulses have been recently reported as nontransverse, space-time nonseparable topological excitations of free space [Nat. Photon. 16, 523-528 (2022)]. However, their…Ren Wang, Zhi-Qiang Hu, Pan-Yi Bao et al.·Nov 3, 2023SaveLearn
Helmholtz Theorem and UniquenessVector calculus in three dimensions with a Euclidian metric is the lingua franca of classical physics, including classical electrodynamics. This article corrects some long-standing imprecision in a…Oliver Davis Johns·Oct 30, 2023SaveLearn
Motions of a homopolar motor inside a conducting tubeWe analyze the physics of a type of homopolar motor comprising an AA battery with two cylindrical neodymium magnets on each end that roll inside a metal cylindrical tube. The motion of the motor…Anh Q. Do, Duy V. Nguyen·Oct 30, 2023SaveLearn
Visualization of cylindrical resonancesThe analysis of cylindrical resonators is part of standard physics curricula but, unlike for their rectangular counterpart, their mode structure is hardly ever visualized. The aim of this work is to…Brais Vila·Oct 27, 2023SaveLearn
Forget metamaterial: It does not improve sound absorption performance as it claimsThe term `sub-wavelength' is commonly used to describe innovative sound-absorbing structures usually labeled as `metamaterials'. Such structures, however, inherently do not bring…Chao Shen, Yu Liu, Tianquan Tang et al.·Oct 23, 2023SaveLearn
Amplitude-dependent modal coefficients accounting for localized nonlinear losses in a time-domain integration of woodwind modelThis article develops the design of a sound synthesis model of a woodwind instrument by modal decomposition of the input impedance, taking into account viscothermal losses as well as localized…Nathan Szwarcberg, Tom Colinot, Christophe Vergez et al.·Oct 20, 2023SaveLearn
Dispersion and absorption effects in the linearized Euler-Heisenberg electrodynamics under an external magnetic fieldThe effects of the Ohmic and magnetic density currents are investigated in the linearized Euler-Heisenberg electrodynamics. The linearization is introduced through an external magnetic field, in…G. R. Santos, M. J. Neves·Oct 19, 2023SaveLearn
High-order homogenisation of the time-modulated wave equation: non-reciprocity for a single varying parameterLaminated media with material properties modulated in space and time in the form of travelling waves have long been known to exhibit non-reciprocity. However, when using the method of low frequency…Marie Touboul, Bruno Lombard, Raphaël Assier et al.·Oct 19, 2023SaveLearn
Amplification of electromagnetic waves by a rotating bodyIn 1971, Zel'dovich predicted the amplification of electromagnetic (EM) waves scattered by a rotating metallic cylinder, gaining mechanical rotational energy from the body. Since then, this…M. C. Braidotti, A. Vinante, M. Cromb et al.·Oct 18, 2023SaveLearn
Perfect Splitting in Rectangular Waveguide Junctions for Analogue ComputingIt has been recently shown how computing operations such as high-speed switching, routing, and solving partial differential equations can be performed by exploiting perfect splitting of…William Rogers, Christian Johnson-Richards, Alex Yakovlev et al.·Oct 13, 2023SaveLearn
Space-time symmetry and nonreciprocal parametric resonance in mechanical systemsLinear mechanical systems with time-modulated parameters can harbor oscillations with amplitudes that grow or decay exponentially with time due to the phenomenon of parametric resonance. While the…Abhijeet Melkani, Jayson Paulose·Oct 12, 2023SaveLearn
Stabilization against gravity and self-tuning of an elastic variable-length rod through an oscillating sliding sleeveAn elastic rod, straight in its undeformed state, has a mass attached at one end and a variable length, due to a constraint at the other end by a frictionless sliding sleeve. The constraint is…Panagiotis Koutsogiannakis, Diego Misseroni, Davide Bigoni et al.·Oct 12, 2023SaveLearn