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Nonlinear generation of large-scale magnetic fields in forced spherical shell dynamos
Posted on March 4th, 2010 No commentsP. W. Livermore, D. W. Hughes, and S. M. Tobias<br/> In an earlier paper [P. W. Livermore, D. W. Hughes, and S. M. Tobias, The role of helicity and stretching in forced kinematic dynamos in a spherical shell, Phys. Fluids 19, 057101 (2007)], we considered the kinematic dynamo action resulting from a forced helical flow in a spherical shell. Although m … [Phys. Fluids 22, 037101 (2010)] published Thu Mar 4, 2010.
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Orientation, distribution, and deposition of elongated, inertial fibers in turbulent channel flow
Posted on March 4th, 2010 No commentsCristian Marchioli, Marco Fantoni, and Alfredo Soldati<br/> In this paper, the dispersion of rigid, highly elongated fibers in a turbulent channel flow is investigated. Fibers are treated as prolate ellipsoidal particles which move according to their inertia and to hydrodynamic drag and rotate according to hydrodynamic torques. The orientational behavior of … [Phys. Fluids 22, 033301 (2010)] published Thu Mar 4, 2010.
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Nonlinear dynamics of a thin liquid film on an axially oscillating cylindrical surface
Posted on March 4th, 2010 No commentsOry Haimovich and Alexander Oron<br/> We have derived a nonlinear evolution equation describing the dynamics of an axisymmetric liquid film on a cylindrical surface subjected to axial harmonic oscillation. We have found that the capillary long-time film rupture typical for the case of a film on a static cylinder can be arrested if the s … [Phys. Fluids 22, 032101 (2010)] published Thu Mar 4, 2010.
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Generalization of symmetric alpha-stable Levy distributions for q>1
Posted on March 4th, 2010 No commentsSabir Umarov, Constantino Tsallis, Murray Gell-Mann, and Stanly Steinberg<br/> The alpha-stable distributions introduced by Levy play an important role in probabilistic theoretical studies and their various applications, e.g., in statistical physics theory, life sciences, and economics. In the present paper we study sequences of long-range dependent random variables whose distributio … [J. Math. Phys. 51, 033502 (2010)] published Wed Mar 3, 2010.
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Path integral solutions for KleinGordon particle in vector plus scalar generalized Hulthen and WoodsSaxon potentials
Posted on March 4th, 2010 No commentsF. Benamira, L. Guechi, S. Mameri, and M. A. Sadoun<br/> The Green’s function for a KleinGordon particle under the action of vector plus scalar deformed Hulthen and WoodsSaxon potentials is evaluated by exact path integration. Explicit path integration leads to the Green’s function for different shapes of the potentials. From the singularities of the latt … [J. Math. Phys. 51, 032301 (2010)] published Wed Mar 3, 2010.
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Effect of ion bombardment on the field emission property of tetrapod ZnO
Posted on March 4th, 2010 No commentsYunkang Cui, Xiaobing Zhang, Wei Lei, Yunsong Di, Jinchan Wang et al.<br/> The influences of ion bombardment on the field emission performance of tetrapod ZnO nanostructures are reported. As the scanning electron microscopy images and photoluminescence spectrum show, the tips of the field emitters are destroyed and the surface state of the field emitters is also changed af … [J. Appl. Phys. 107, 054506 (2010)] published Thu Mar 4, 2010.
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Microscopic origin of slow dynamics at the good glass forming composition range in ZrCu metallic liquids
Posted on March 4th, 2010 No commentsS. G. Hao, C. Z. Wang, M. J. Kramer, and K. M. Ho<br/> We have studied the structure and dynamics of a series of ZrCu metallic liquids at temperatures of 1500 and 1300 K. We found that as the Cu composition increases, the ZrZr order undergoes considerable transition, which can be attributed to the different size of Zr and Cu atoms. The diffusivities of … [J. Appl. Phys. 107, 053511 (2010)] published Thu Mar 4, 2010.
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Characteristics of a magnetohydrodynamic electrical power generator using convexly divergent channel
Posted on March 4th, 2010 No commentsTomoyuki Murakami and Yoshihiro Okuno<br/> We describe a magnetohydrodynamic (MHD) electrical power generator equipped with a convexly divergent channel, as determined through shock-tunnel-based experiments. The slight enhancement in a MHD channel divergence upstream provides boundary layer relief in a MHD flow decelerated by a retarding Lor … [J. Appl. Phys. 107, 053304 (2010)] published Thu Mar 4, 2010.
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Heavily Ga-doped germanium layers produced by ion implantation and flash lamp annealing: Structure and electrical activation
Posted on March 4th, 2010 No commentsV. Heera, A. Mucklich, M. Posselt, M. Voelskow, C. Wundisch et al.<br/> Heavily p-type doped Ge layers were fabricated by 100 keV Ga implantation and subsequent flash lamp annealing for 3 ms in the temperature range between 700 and 900 degrees C. For comparison, some samples were annealed in a rapid thermal processor for 60 s. Ga fluences of 2 x 10, 6 x 10, and 2 x 10 … [J. Appl. Phys. 107, 053508 (2010)] published Thu Mar 4, 2010.
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Present status of theoretical modeling the magnetoelectric effect in magnetostrictive-piezoelectric nanostructures. Part I: Low frequency and electromechanical resonance ranges
Posted on March 4th, 2010 No commentsM. I. Bichurin, V. M. Petrov, S. V. Averkin, and E. Liverts<br/> Mechanical deformations of a magnetostrictive-piezoelectric bilayer result in the interaction between the magnetic and electric subsystems. This review reports the models for describing the distinctive features of magnetoelectric (ME) interactions in ferrite-piezoelectric nanostructures at low-frequ … [J. Appl. Phys. 107, 053904 (2010)] published Thu Mar 4, 2010.