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Classical Physics papers — page 134

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The watt-balance operation: magnetic force and induced electric potential on a conductor in a magnetic field
In a watt balance experiment, separate measurements of magnetic force and induced electric potential in a conductor in a magnetic field allow for a virtual comparison between mechanical and…
C. P. Sasso, E. Massa, G. ManaDec 21, 2012
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Luge Track Safety
Simple geometric models of ice surface shape and equations of motion of objects on these surfaces can be used to explain ejection of sliders from ice tracks. Simulations using these can be used to…
Mont HubbardDec 20, 2012
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Electrodynamics of a Worldsheet of Lightlike Current
An equation of motion is derived for a topologically cylindrical worldsheet of lightlike electromagnetic current, embedded in 3+1 dimensions in a smooth external electromagnetic field. Then it is…
J. MarguliesDec 18, 2012
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Radiation Reaction Force on a Particle
The Abrahamn Lorentz radiation reaction force term, with da/dt, derived in text books is shown to be incomplete. We show that, with the addition of a term, the classical radiation reaction force can…
H. Fearn, J. BengtssonDec 14, 2012
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The double-padlock problem: is secure classical information transmission possible without key exchange?
The idealized Kish-Sethuraman (KS) cipher is theoretically known to offer perfect security through a classical information channel. However, realization of the protocol is hitherto an open problem,…
James M. Chappell, Derek AbbottDec 13, 2012
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Vibrational and acoustical characteristics of the piano soundboard
The vibrations of the soundboard of an upright piano in playing condition are investigated. It is first shown that the linear part of the response is at least 50 dB above its nonlinear component at…
Kerem Ege, Xavier BoutillonDec 13, 2012
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Vibroacoustics of the piano soundboard: (Non)linearity and modal properties in the low and mid-frequency ranges
The piano soundboard transforms the string vibration into sound and therefore, its vibrations are of primary importance for the sound characteristics of the instrument. An original vibro-acoustical…
Kerem Ege, Xavier Boutillon, Marc RébillatDec 11, 2012
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Canonical equations of Hamilton with beautiful symmetry
The Hamiltonian formulation plays the essential role in constructing the framework of modern physics. In this paper, a new form of canonical equations of Hamilton with the complete symmetry is…
Guo Liang, Qi GuoDec 10, 2012
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Recognising Top-Down Causation
One of the basic assumptions implicit in the way physics is usually done is that all causation flows in a bottom up fashion, from micro to macro scales. However this is wrong in many cases in…
George F R EllisDec 9, 2012
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Analysis of the circular track experiment measuring the one-way speed of light
All experiments attempting to verify the invariance of speed of light directly are based on two-way speed measurement. The challenge in one-way speed measurement, the requirement of spatially…
Evan John PhilipDec 7, 2012
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Impedance of rigid bodies in one-dimensional elastic collisions
In this work we study the problem of one-dimensional elastic collisions of billiard balls, considered as rigid bodies, in a framework very different from the classical one presented in text books.…
Janilo Santos, Bruna P. W. de Oliveira, Osman Rosso NelsonDec 6, 2012
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A General Formulation for the Stiffness Matrix of Parallel Mechanisms
Starting from the definition of a stiffness matrix, the authors present a new formulation of the Cartesian stiffness matrix of parallel mechanisms. The proposed formulation is more general than any…
Cyril Quennouelle, Clément M. GosselinDec 5, 2012
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A bimetal and electret-based converter for thermal energy harvesting
This paper presents a new device able to turn thermal gradients into electricity by using a bimetal-based heat engine coupled to an electrostatic converter. A two-steps conversion is performed: (i) a…
S. Boisseau, G. Despesse, S. Monfray et al.Dec 4, 2012
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Twisted Radio Waves and Twisted Thermodynamics
We present and analyze a gedanken experiment and show that the assumption that an antenna operating at a single frequency can transmit more than two independent information channels to the far field…
Laszlo B. Kish, Robert D. NevelsDec 2, 2012
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A high-order, purely frequency based harmonic balance formulation for continuation of periodic solutions: The case of non-polynomial nonlinearities
In this paper, we extend the method proposed by Cochelin and Vergez [A high order purely frequency-based harmonic balance formulation for continuation of periodic solutions, Journal of Sound and…
Sami Karkar, Bruno Cochelin, Christophe VergezNov 28, 2012
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Geometric Mechanics of Periodic Pleated Origami
Origami is the archetype of a structural material with unusual mechanical properties that arise almost exclusively from the geometry of its constituent folds and forms the basis for mechanical…
Zhiyan Wei, Zengcai Guo, Levi Dudte et al.Nov 27, 2012
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Absolute clock synchronisation and special relativity paradoxes
Solving special relativity paradoxes requires rigorous analysis of event timing, due to relative simultaneity in consequence of the Lorentz transformation. Since clock synchronisation is a convention…
Jacek Ciborowski, Marta WlodarczykNov 25, 2012
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On the "Non-Restricted special Relativity" theory (NRR), and further comments on "Cherenkov vs X-waves"
Our aim in this paper is to recall some essential points of "Extended special Relativity", now more correctly called "Non-Restricted special Relativity" theory (NRR), and in…
Michel Zamboni-Rached, Erasmo Recami, Ioannis M. BesierisNov 25, 2012
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Comment on "Exact Expression for Radiation of an Accelerated Charge in Classical Electrodynamics"
It is shown that a newly derived "exact expression" for radiation of an accelerated charge in the recent literature is simply incorrect, having arisen because of a wrong relativistic…
Ashok K. SingalNov 24, 2012
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Stored Electromagnetic Energy and Antenna Q
Decomposition of the electromagnetic energy into its stored and radiated parts is instrumental in the evaluation of antenna Q and the corresponding fundamental limitations on antennas. This…
Mats Gustafsson, B. L. G. JonssonNov 23, 2012
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Radiation reaction on a classical charged particle: a modified form of the equation of motion
We present and numerically solve a modified form of the equation of motion for a charged particle under the influence of an external force, taking into account the radiation reaction. This covariant…
Guillermo Garcia Alcaine, Felipe J. Llanes-EstradaNov 23, 2012
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Solving for three-dimensional central potentials using matrix mechanics
Matrix mechanics is an important component of an undergraduate education in quantum mechanics. In this paper we present several examples of the use of matrix mechanics to solve for a number of three…
B. A. Jugdutt, F. MarsiglioNov 22, 2012
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Uncertainty Analysis for a Simple Thermal Expansion Experiment
We describe a simple experiment for measuring the thermal expansion coefficient of a metal wire and discuss how the experiment can be used as a tool for exploring the interplay of measurement…
Dimitri R. Dounas-Frazer, Geoff Z. Iwata, Punit R. GandhiNov 19, 2012
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A variational approach to the analysis of non-conservative mechatronic systems
We develop a method for systematically constructing Lagrangian functions for dissipative mechanical, electrical and, mechatronic systems. We derive the equations of motion for some typical…
A. Allison, C. E. M. Pearce, D. AbbottNov 18, 2012
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Total absorption of electromagnetic waves in ultimately thin layers
We consider single-layer arrays of electrically small lossy bi-anisotropic particles that completely absorb electromagnetic waves at normal incidence. Required conditions for electromagnetic…
Younes Ra'di, Victor S. Asadchy, Sergei A. TretyakovNov 15, 2012
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