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Classical Physics papers — page 121

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The physics of articulated toys - a jumping and rotating kangaroo
We describe the physics of an articulated toy with an internal source of energy provided by a spiral spring. The toy is a funny low cost kangaroo which jumps and rotates. The study consists of a…
J. Güémez, M. FiolhaisJul 14, 2014
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Effect of the shape of mouth pressure variation on dynamic oscillation threshold of a clarinet model
Simple models of clarinet instruments based on iterated maps have been used in the past to successfully estimate the threshold of oscillation of this instrument as a function of a constant blowing…
Baptiste Bergeot, André Almeida, Christophe VergezJul 14, 2014
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A theory of static friction between homogeneous surfaces based on compressible elastic smooth microscopic inclines
We develop a theory of static friction by modeling the homogeneous surfaces of contact as being composed of a regular array of compressible elastic smooth microscopic inclines. Static friction is…
Freeman Chee Siong Thun, Vee-Liem Saw, Kin Sung ChanJul 11, 2014
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Variable viscosity condition in the modeling of a slider bearing
To reduce tear and wear of machinery lubrication is essential. Lubricants form a layer between two surfaces preventing direct contact and reduce friction between moving parts and hence reduce wear.…
Kedar Nath Uprety, Stefan C. MancasJul 11, 2014
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Occam's Razor Cuts Away the Maximum Entropy Principle
I show that the maximum entropy principle can be replaced by a more natural assumption, that there exists a phenomenological function of entropy consistent with the microscopic model. The requirement…
Łukasz RudnickiJul 9, 2014
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High frequency homogenisation for elastic lattices
A complete methodology, based on a two-scale asymptotic approach, that enables the homogenisation of elastic lattices at non-zero frequencies is developed. Elastic lattices are distinguished from…
D. J. Colquitt, R. V. Craster, M. MakwanaJul 8, 2014
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On the Superposition and Elastic Recoil of Electromagnetic Waves
Superposition demands that a linear combination of solutions to an electromagnetic problem also be a solution. This paper analyzes some very simple problems: the constructive and destructive…
Hans G. SchantzJul 7, 2014
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Closedness of orbits in a space with SU(2) Poisson structure
The closedness of orbits of central forces is addressed in a three dimensional space in which the Poisson bracket among the coordinates is that of the SU(2) Lie algebra. In particular it is shown…
Amir H. Fatollahi, Ahmad Shariati, Mohammad KhorramiJul 4, 2014
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A passively tunable non-resonant acoustic metamaterial lens for selective ultrasonic excitation
In this paper, we present an approach to ultrasonic beam-forming and beam-steering in structures based on the concept of embedded non-resonant acoustic metamaterial lenses. The lens design exploits…
Hongfei Zhu, Fabio SemperlottiJul 4, 2014
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A quasi-static electromagnetic analysis for experiments with strong permanent magnets
An electromagnetic analysis is presented for experiments with strong permanent disc magnets. The analysis is based on the well known experiment that demonstrates the effect of circulating eddy…
Sven Nordebo, Alexander GustafssonJul 3, 2014
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On local space-time of loop topological defects in a newtonian lattice
One of the most fundamental questions of modern physics is the nature of spacetime. There are various propositions on the table, as the grand unified theory, quantum gravity, supersymmetry, string…
Gérard GremaudJul 2, 2014
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Asymptotic decomposition in the problem of joined elastic plates
In this paper, a method of local perturbations, previously successfully applied to decompose the problem of elasticity in the system of connected thin rods and beams [Kolpakov and Andrianov, 2013],…
I. V. Andrianov, A. G. Kolpakov, B. MarkertJul 2, 2014
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Didactic derivation of the special theory of relativity from the Klein-Gordon equation
We present a didactic derivation of the special theory of relativity in which Lorentz transformations are `discovered' as symmetry transformations of the Klein-Gordon equation. The interpretation…
H. ArodźJun 27, 2014
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Transforming magnets
Based on the form-invariant of Maxwell's equations under coordinate transformations, we extend the theory of transformation optics to transformation magneto-statics, which can design magnets…
F. Sun, S. HeJun 25, 2014
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Forerunning mode transition in a continuous waveguide
We have discovered a new, forerunning mode transition as the periodic transition wave propagating in a uniform continuous waveguide. The latter is represented by an elastic beam separating from the…
Leonid Slepyan, Mark Ayzenberg-Stepanenko, Gennady MishurisJun 24, 2014
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A mode parabolic equations method with the resonant mode interaction
A mode parabolic equation method for resonantly interacted modes was developed. The flow of acoustic energy is conserved for the derived equations with an accuracy adequate to the used approximation.…
M. Yu. Trofimov, S. B. Kozitskiy, A. D. ZakharenkoJun 23, 2014
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System parameters and measurement instrument parameters are not separately observable: Relational mass is observable while absolute mass is not
A brief summary of the objections to the relational nature of inertial mass, gravitational mass and electric charge is presented. The objections are refuted by showing that the measurement process of…
Craig R. HoltJun 19, 2014
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Complete solutions of the Hamilton-Jacobi equation and the envelope method
It is shown that the parameters contained in any two complete solutions of the Hamilton-Jacobi equation, corresponding to a given Hamiltonian, are related by means of a time-independent canonical…
G. F. Torres del Castillo, G. S. Anaya GonzálezJun 19, 2014
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Geometrical and physical parameters for electromagnetic relativistic sources
The electromagnetic field is typically measured by the charged particle motion observation. Generally in the experiments, position, velocity and other physical parameters concerning relativistic…
Giuseppina ModestinoJun 18, 2014
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Tuning gain and bandwidth of traveling wave tubes using metamaterial beam-wave interaction structures
We employ metamaterial beam-wave interaction structures for tuning the gain and bandwidth of short traveling wave tubes. The interaction structures are made from metal rings of uniform cross section,…
Robert Lipton, Anthony PolizziJun 16, 2014
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Jump conditions for strings and sheets from an action principle
I present conditions for compatibility of velocities, conservation of mass, and balance of momentum and energy across moving discontinuities in inextensible strings and sheets of uniform mass…
J. A. HannaJun 14, 2014
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On the foundations of the classical relativistic theory of the field of an accelerated extended charge
The effect of nonzero extent of an electric charge is considered within the assumption that the structure of the charge at rest is spherically-symmetric and the current vector is linear in the…
M. B. EpendievJun 13, 2014
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Integral Property of Laplace Operator
Relations have been derived which establish connection between a scalar or a vector functions and the integral of Laplace operator of these functions (the integral property of Laplace operator). The…
Andrey VasilyevJun 13, 2014
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Reverse Time Migration for Reconstructing Extended Obstacles in Planar Acoustic Waveguides
We propose a new reverse time migration method for reconstructing extended obstacles in the planar waveguide using acoustic waves at a fixed frequency. We prove the resolution of the reconstruction…
Zhiming Chen, Guanghui HuangJun 10, 2014
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Vector Potential Electromagnetic Theory with Generalized Gauge for Inhomogeneous Anisotropic Media
Vector and scalar potential formulation is valid from quantum theory to classical electromagnetics. The rapid development in quantum optics calls for electromagnetic solutions that straddle quantum…
Weng Cho ChewJun 9, 2014
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