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Classical Physics papers — page 106

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Unlimited-Power Reflectors, Absorbers, and Emitters with Conjugately Matched Layers
In order to ensure the fastest wireless energy transfer from a source to the user one needs to maximize the channel capacity for power transport. In communications technologies, the concept of MIMO…
Constantinos A. Valagiannopoulos, Sergei A. TretyakovMay 11, 2016
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A discussion on approximations for the determination of the maximum period of a simple pendulum
In this paper we deal with the care one must have in adopting approximations in regard with terms he chooses to leave behind in the particular case of the expression valid for the maximum period of a…
Rogério Netto Suave, José Alexandre NogueiraMay 10, 2016
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Linearization of the Relativistic Oscillator Hierarchy
This paper is based on MacColl's [1] solution of the equation of motion for a linear (harmonic) oscillator subject to the laws of special relativity in the rest frame of the center of attraction.…
Robert L. AndersonMay 6, 2016
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Achieving acoustic cloak by using compressible background flow
We propose a scheme of acoustic spherical cloaking by means of background irrotational flow in compressible fluid. The background flow forms a virtual curved spacetime and guides the sound waves…
Ruo-Yang Zhang, Qing Zhao, Mo-Lin GeMay 6, 2016
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On Divergence in Radiation Fields
Three thought experiments demonstrate that under certain circumstances electromagnetic fields have to be attenuated or amplified multiplicatively in order not to violate the conservation of energy.…
Joerg FrickeMay 2, 2016
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Stored energies for electric and magnetic current densities
Electric and magnetic current densities are an essential part of electromagnetic theory. The goal of the present paper is to define and investigate stored energies that are valid for structures that…
B. L. G. Jonsson, Mats GustafssonApr 28, 2016
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Angular momentum and topological dependence of Kepler's Third Law in the Broucke-Hadjidemetriou-Hénon family of periodic three-body orbits
We use 57 recently found topological satellites of Broucke-Hadjidemetriou-Henon's periodic orbits with values of the topological exponent k ranging from k = 3 to k = 58 to plot the angular…
Marija R. Janković, Veljko DmitrašinovićApr 28, 2016
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Formation of high-order acoustic Bessel beams by spiral diffraction gratings
The formation of high-order Bessel beams by a passive acoustic device consisting of an Archimedes' spiral diffraction grating is theoretically, numerically and experimentally reported in this…
Noé Jiménez, Rubén Picó, Víctor Sánchez-Morcillo et al.Apr 28, 2016
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Modified Shallow Water Equations for significantly varying seabeds
In the present study, we propose a modified version of the Nonlinear Shallow Water Equations (Saint-Venant or NSWE) for irrotational surface waves in the case when the bottom undergoes some…
Denys Dutykh, Didier ClamondApr 27, 2016
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A note on "Measuring propagation speed of Coulomb fields" by R. de Sangro, G. Finocchiaro, P. Patteri, M. Piccolo, G. Pizzella
In connection with the discussion and the measurements fulfilled in [R. de Sangro et al., Eur. Phys. J. C 75 (2015) 137], the full identity is demonstrated between the Feynman formula for the field…
D. M. Gitman, A. E. Shabad, A. A. ShishmarevApr 26, 2016
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Acoustojet: acoustic analogue of photonic jet phenomenon
It has been demonstrated for the first time that an existence of acoustic analogue of photonic jet phenomenon, called acoustojet, providing for subwavelength localization of acoustic field in the…
Igor V. Minin, Oleg V. MininApr 25, 2016
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Irreducible decomposition of strain gradient tensor in isotropic strain gradient elasticity
In isotropic strain gradient elasticity, we decompose the strain gradient tensor into its irreducible pieces under the n-dimensional orthogonal group O(n). Using the Young tableau method for…
Markus LazarApr 25, 2016
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Bloch waves in an arbitrary two-dimensional lattice of subwavelength Dirichlet scatterers
We study waves governed by the planar Helmholtz equation, propagating in an infinite lattice of subwavelength Dirichlet scatterers, the periodicity being comparable to the wavelength. Applying the…
Ory Schnitzer, Richard V. CrasterApr 23, 2016
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Dynamics of the verge and foliot clock escapement
The verge and foliot escapement has received relatively little attention in horology, despite the fact that it has been used in clocks for ages. We analyse the operation of a verge and foliot…
P. Hoyng, A. C. T. NieuwenhuizenApr 22, 2016
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Application of Cross-correlation Greens Function along with FDTD for Fast Computation of Envelope Correlation Coefficient over Wideband for MIMO Antennas
In this paper, the concept of cross-correlation Green's functions (CGF) is used in conjunction with the finite difference time domain (FDTD) technique for calculation of envelope correlation…
Debdeep Sarkar, Kumar Vaibhav SrivastavaApr 22, 2016
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Dynamics of spherical distributions of charge with small internal dipolar motion
This paper extends the Lorentz-Abraham model of an electron (i.e. the equations of motion for a small spherical shell of charge, which is rigid in its proper frame) to treat a small spherically…
P. D. FlammerApr 20, 2016
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Loss-induced enhanced transmission in anisotropic density-near-zero acoustic metamaterials
Anisotropic density-near-zero (ADNZ) acoustic metamaterials are investigated theoretically and numerically in this letter and are shown to exhibit extraordinary transmission enhancement when material…
Chen Shen, Yun JingApr 20, 2016
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Relativistic transformation of temperature and Mosengeil-Ott's antinomy
A not satisfactorily solved problem of relativistic transformation of temperature playing the decisive role in relativistic thermal physics and cosmology is reopened. It is shown that the origin of…
J. J. Mares, P. Hubik, J. Sestak et al.Apr 19, 2016
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Do we know what the temperature is?
Temperature, the central concept of thermal physics, is one of the most frequently employed physical quantities in common practice. Even though the operative methods of the temperature measurement…
Jiri J. MaresApr 19, 2016
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Excitation of the classical electromagnetic field in a cavity containing a thin slab with a time-dependent conductivity
An exact infinite set of coupled ordinary differential equations, describing the evolution of the modes of the classical electromagnetic field inside an ideal cavity, containing a thin slab with the…
V. V. Dodonov, A. V. DodonovApr 18, 2016
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Differential geometric mechanisms in Ostrohrads'kyj relativistic spherical top dynamics
Some intrinsic tools from the formal theory of variational equations are being demonstrated at work in application to one concrete example of the third-order evolution equation of free relativistic…
R. Ya. MatsyukApr 16, 2016
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Partial reconstruction of the rotational motion of Philae spacecraft during its landing on comet 67P/Churyumov-Gerasimenko
This paper presents a partial reconstruction of the rotational dynamics of the Philae spacecraft upon landing on comet 67P/Churyumov-Gerasimenko as part of ESA's Rosetta mission. We analyze the…
Tamás Baranyai, András Balázs, Péter L. VárkonyiApr 15, 2016
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Old Game, New Rules: Rethinking The Form of Physics
We investigate the modeling capabilities of sets of coupled classical harmonic oscillators (CHO) in the form of a modeling game. The application of simple but restrictive rules of the game lead to…
Christian BaumgartenApr 8, 2016
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Proceedings of the 39th Scandinavian Symposium on Physical Acoustics
The 39th Scandinavian Symposium on Physical Acoustics was held at Geilo, Norway from January 31 to February 3, 2016. It was arranged by the Acoustics and Optics group of the Norwegian Physical…
Erlend Magnus Viggen, Ulf KristiansenApr 6, 2016
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Ponderomotive forces in electrodynamics of moving media: The Minkowski and Abraham approaches
In the general setting of the problem, the explicit compact formulae are derived for the ponderomotive forces in the macroscopic electrodynamics of moving media in the Minkowski and Abraham…
V. V. Nesterenko, A. V. NesterenkoApr 6, 2016
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