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Classical Physics papers — page 88

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Radiation of Channeled Positrons in Ultrasonic Wave
In the classical approximation, we examine the problem of radiation by channeled positrons in the field of a longitudinal ultrasonic wave when the condition of parametric resonance is satisfied. We…
E. A. Ayryan, K. V. Ivanyan, M. Hnatic et al.Jan 8, 2018
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A Note on Norton's Dome
"Norton's Dome" is an example of a Newtonian system that violates the Lipschitz condition at a single point, leading to non-unique solutions (indeterminism). Here we reformulate this…
Christine C. DantasJan 5, 2018
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Reduction of the classical electromagnetism to a two-dimensional curved surface
The reduction of the three-dimensional classical electromagnetism is performed in a twofold way. In the first case the ordinary two-dimensional electromagnetism is obtained with sources in the form…
Tomasz RadozyckiJan 5, 2018
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Unconventional cycles, pseudoadiabatics and multiple adiabatic points
Unconventional cycles provide a useful didactic resource to discuss the second law of thermodynamics applied to thermal motors and their efficiency. In most cases they involve a negative slope,…
Jeferson J. ArenzonJan 4, 2018
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Radiation Forces and the Abraham-Minkowski Problem
Recent years have witnessed a number of beautiful experiments in radiation optics. Our purpose with this mini-review is to highlight some developments of radiation pressure physics in general, and…
Iver BrevikDec 30, 2017
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Low frequency acoustic stop bands in cubic arrays of thick spherical shells with holes
We analyse the propagation of pressure waves within a fluid filled with a three-dimensional array of rigid coated spheres (shells). We first draw band diagrams for corresponding Floquet-Bloch waves.…
Guillaume Dupont, Alexander Movchan, Stefan Enoch et al.Dec 29, 2017
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Lagrangian description and Hamiltonian density for the electrodynamics of dispersive metamaterials
The Lagrangians and dissipation functions are proposed for use in the electrodynamics of the double-negative and chiral metamaterials with finite loss. The double-negative metamaterial considered…
Pi-Gang LuanDec 29, 2017
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Revisiting the charging-capacitor problem
The charging capacitor is used as a standard paradigm for illustrating the concept of the Maxwell "displacement current". A certain aspect of the problem, however, is often overlooked. It…
C. J. PapachristouDec 22, 2017
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Demystifying the constancy of the Ermakov-Lewis invariant for a time dependent oscillator
It is well known that the time dependent harmonic oscillator possesses a conserved quantity, usually called Ermakov-Lewis invariant. I provide a simple physical interpretation of this invariant as…
T. PadmanabhanDec 20, 2017
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The Late Jolt -- Re-Examining the World Trade Center Catastrophe
A model of a gravity-driven collapse of a tall building has been proposed by Bažant et al. We apply this model to the collapse of the North Tower of the World Trade Center to determine the energy…
Ansgar SchneiderDec 17, 2017
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The Crush-Down Equation for Non-Constant Velocity Profiles
Bažant et al. have proposed a model for a gravity-driven collapse of a tall building that collapses after column failure in a single storey. Therein the collapsing building is described by three…
Ansgar SchneiderDec 17, 2017
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Energy Estimates of Progressive Floor Collapses and the World Trade Center Catastrophe
The Simple Collapse Model of Bažant and Zhou is evaluated for a progressive floor collapse of a tall building. A sequence of energy estimates indexed by the collapsing floors is derived. Each of the…
Ansgar SchneiderDec 17, 2017
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Impact-induced acceleration by obstacles
We explore a surprising phenomenon in which an obstruction accelerates, rather than decelerates, a moving flexible object. It has been claimed that the right kind of discrete chain falling onto a…
N. A. Corbin, J. A. Hanna, W. R. Royston et al.Dec 15, 2017
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Acoustic radiation force and torque on a viscous fluid cylindrical particle nearby a planar rigid wall
This work presents an analytical formalism for the modal series expansions of the acoustic radiation force and radiation torque experienced by a fluid viscous cylindrical object of arbitrary…
F. G. MitriDec 15, 2017
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Reflection from a multi-species material and its transmitted effective wavenumber
We formally deduce closed-form expressions for the transmitted effective wavenumber of a material comprising multiple types of inclusions or particles (multi-species), dispersed in a uniform…
Artur L. Gower, Michael J. A. Smith, William J. Parnell et al.Dec 14, 2017
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New exact relations for steady irrotational two-dimensional gravity and capillary surface waves
Steady two-dimensional surface capillary-gravity waves in irrotational motion are considered on constant depth. By exploiting the holomorphic properties in the physical plane and introducing some…
Didier ClamondDec 13, 2017
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Bell's Spaceships: The Views from Bow and Stern
Unravelling apparent paradoxes has proven to be a powerful tool for understanding the complexities of special relativity. In this paper, we focus upon one such paradox, namely Bell's spaceship…
Geraint F. Lewis, Luke A. Barnes, Martin J. StickaDec 12, 2017
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Applications of Fractional Calculus to Newtonian Mechanics
We investigate some basic applications of Fractional Calculus (FC) to Newtonian mechanics. After a brief review of FC, we consider a possible generalization of Newton's second law of motion and…
Gabriele U. VarieschiDec 10, 2017
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Semi-infinite herringbone waveguides in elastic plates
The paper includes novel results for the scattering and localisation of a time-harmonic flexural wave by a semi-infinite herringbone waveguide of rigid pins embedded within an elastic Kirchhoff…
Stewart G Haslinger, Ian S Jones, Natasha V Movchan et al.Dec 4, 2017
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Resonance oscillation of a damped driven simple pendulum
The resonance characteristics of a driven damped harmonic oscillator are well known. Unlike harmonic oscillators which are guided by parabolic potentials, a simple pendulum oscillates under…
D. Kharkongor, Mangal C. MahatoDec 4, 2017
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Paradoxes of differential nonlocal cantilever beams: Reasons and a novel solution
The paradoxes of differential nonlocal models have been attributed to the inconsistency in forming the nonlocal boundary conditions. To overcome these paradoxes, nonlocal boundary conditions should…
M. Shaat, S. Faroughi, L. AbasiniyanDec 2, 2017
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Poisson ratio effects on the mechanics of auxetic nanobeams
Poisson ratio is an important mechanical property that reveals the deformation patterns of materials. A positive Poisson ratio is a feature of the majority of materials. Some materials, however,…
S. Faroughi, M. ShaatDec 2, 2017
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The dynamics of scattering in undulatory active collisions
Natural and artificial self-propelled systems must manage environmental interactions during movement. Such interactions, which we refer to as active collisions, are fundamentally different from…
Jennifer M. Rieser, Perrin E. Schiebel, Arman Pazouki et al.Dec 1, 2017
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Relativistic Dynamics of Point Magnetic Moment
The covariant motion of a classical point particle with magnetic moment in the presence of (external) electromagnetic fields is revisited. We are interested in understanding Lorentz force extension…
Johann Rafelski, Martin Formanek, Andrew SteinmetzDec 1, 2017
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Long-Range Longitudinal Electric Wave in Vacuum Radiated by Electric Dipole: Part I
In this work by using the assumptions that wavelength is much smaller than charge separation distance of an electric dipole, which in turn is much smaller than a distance up to the point of…
Altay Zhakatayev, Leila TlebaldiyevaNov 30, 2017
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