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Classical Physics papers — page 182

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Spontaneous Symmetry Breaking in Quantum Mechanics
We present a clear and mathematically simple procedure explaining spontaneous symmetry breaking in quantum mechanical systems. The procedure is applicable to a wide range of models and can be easily…
Jasper van Wezel, Jeroen van den BrinkSep 21, 2006
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The inertia of stress
We present a simple example in which the importance of the inertial effects of stress is evident. The system is an insulating solid narrow disc whose faces are uniformly charged with charges of equal…
Rodrigo MedinaSep 16, 2006
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Superconducting pipes and levitating magnets
Motivated by a beautiful demonstration of the Faraday's and Lenz's law in which a small neodymium magnet falls slowly through a conducting non-ferromagnetic tube, we consider the dynamics of…
Yan Levin, Felipe B. RizzatoSep 15, 2006
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Some Remarks About Extremum Principles Involving the Rate of Entropy Production
The minimum rate of entropy production (MREP) and the least dissipation energy (LDE) principles are re-examined concerning continuous systems in stationary nonequilibrium states. By means of simple…
M. SalisSep 6, 2006
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Orbital and spin components of the angular momentum of a general electromagnetic field
A decomposition of the angular momentum of the classical electromagnetic field into orbital and spin components that is manifestly gauge invariant and general has been obtained. This is done by…
A. M. StewartSep 5, 2006
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Développement d'instabilités dans un écoulement subsonique se développant au-dessus d'une cavité : mesures synchronisées PIV-LDV
A boundary layer interacting with a cavity is a benchmark case that is present in environmental applications, aeronautics, automobile aerodynamics or industrial applications, where the velocity over…
Thierry Faure, François Lusseyran, Luc Pastur et al.Sep 1, 2006
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Vortex shedding dynamics in the laminar wake of cones
Vortex Shedding Dynamics in the Laminar Wake of Cones Michel Provansal1 and Peter A. Monkewitz1,2 1 IRPHE Aix-Marseille Universités FRANCE 2LMF, EPFL, SWITZERLAND Experiments on two cones of…
Michel Provansal, Peter MonkewitzAug 31, 2006
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Liberties in Nature. On Photons, Bugs and Chess Players
Free will is an old philosophical enigma that has been recently revived by neuropsychology. We restrict ourselves to the problem that determinism seems to allow only an illusion of freedom but random…
Petr HajicekAug 28, 2006
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Noether's theorem in classical mechanics revisited
A didatic approach of the Noether's theorem in classical mechanics is derived and used to obtain the laws of conservation.
Rubens de Melo MarinhoAug 26, 2006
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An Explanation of Dayton Miller's Anomalous "Ether Drift" Result
In 1933 Dayton Miller published in this journal the results of his voluminous observations using his ether drift interferometer, and proclaimed that he had determined the "absolute motion of the…
Thomas J. RobertsAug 24, 2006
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Maxwell's demon through the looking glass
Mechanical Maxwell's demons, such as Smoluchowski's trapdoor and Feynman's ratchet and pawl need external energy source to operate. If you cease to feed a demon the Second Law of…
Z. K. SilagadzeAug 10, 2006
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Influence of magnetic-field inhomogeneity on nonlinear magneto-optical resonances
In this work, a sensitivity of the rate of relaxation of ground-state atomic coherences to magnetic-field inhomogeneities is studied. Such coherences give rise to many interesting phenomena in…
S. Pustelny, D. F. Jackson Kimball, S. M. Rochester et al.Aug 9, 2006
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The hydrino and other unlikely states
We discuss the tightly bound (hydrino) solution of the Klein-Gordon equation for the Coulomb potential in 3 dimensions. We show that a similarly tightly bound state occurs for the Dirac equation in 2…
Norman DombeyAug 8, 2006
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Non-Singular Magnetic Monopole
Magnetic Monopole is a cosequence of the existence of the duality symmetry in electromagnetics. Although, no conclusive experimental evidence have so far been found but the subject is still of much…
Siamak Khademi, Masoumeh Shahsavari, Amir Hosein SaeidAug 4, 2006
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Derivation of the paraxial form of the angular momentum of the electromagnetic field from the general form
It is shown how the standard forms for the spin and orbital components of the angular momentum of a paraxial wave of electromagnetic radiation are obtained from the general expressions for the…
A. M. StewartAug 3, 2006
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Sound beam through a circular aperture and the far-field nonparaxial regime
Propagation of sound beam diffracted from a circular aperture in far-field region has been studied in this paper by the method of angular spectrum representation and stationary phase method. This…
Manas Kumar RoyJul 27, 2006
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Foundations of Special Relativity and the Principle of Conservation of Information
The theory of special relativity can be generalized by means of a new principle called Conservation of Information. This allows a derivation of the constancy of the velocity of light with respect to…
C. Pombo, Th. M. NieuwenhuizenJul 22, 2006
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Turbulence characteristics of the Bödewadt layer in a large shrouded rotor-stator system
A three-dimensional direct numerical simulation (3D DNS) is performed to describe the turbulent flow in an enclosed rotor-stator cavity characterized by a large aspect ratio G=(b-a)/h=18.32 and a…
Sébastien Poncet, Anthony RandriamampianinaJul 18, 2006
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Electrostatic internal energy using the method of images
For several configurations of charges in the presence of conductors, the method of images permits us to obtain some observables associated with such a configuration by replacing the conductors with…
Rodolfo A. Diaz, William J. Herrera, J. Virgilio NiñoJul 14, 2006
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Microstrip antenna miniaturization using partial dielectric material filling
In this paper we study microstrip antenna miniaturization using partial filling of the antenna volume with dielectric materials. An analytical expression is derived for the quality factor of an…
Olli Luukkonen, Pekka Ikonen, Sergei TretyakovJul 14, 2006
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Circular and helical equilibrium solutions of inhomogeneous rods
Real filaments are not perfectly homogeneous. Most of them have various materials composition and shapes making their stiffnesses not constant along the arclength. We investigate the existence of…
Alexandre F. da Fonseca, C. P. MaltaJul 14, 2006
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The Stoner-Wohlfarth model of Ferromagnetism: Dynamic and Statistical properties
The physics of magnetic state change or reversal in single domain magnetic grains (called Stoner particles) is interesting from the fundamental as well as the applied points of view. A change in…
C. Tannous, J. GieraltowskiJul 12, 2006
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The Stoner-Wohlfarth model of Ferromagnetism: Static properties
Recent advances in high-density magnetic storage and spin electronics are based on the use of magnetic materials along with conventional microelectronic materials (metals, insulators and…
C. Tannous, J. GieraltowskiJul 12, 2006
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Magnetic domain-walls and the relaxation method
The relaxation method used to solve boundary value problems is applied to study the variation of the magnetization orientation in several types of domain walls that occur in ferromagnetic materials.…
C. Tannous, J. GieraltowskiJul 12, 2006
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Vortex sheet dynamics and turbulence
The nonlinear evolution of a vortex sheet driven by the Kelvin--Helmholtz instability is characterized by the formation of a spiral possessing complex stretching and intensity patterns. We show that…
Malek Abid, Alberto VergaJul 12, 2006
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