Results 81 to 90 of about 731,067 (193)
DARK ENERGY AND KEY PHYSICAL PARAMETERS OF CLUSTERS OF GALAXIES
Acta Polytechnica, 2013 We study physics of clusters of galaxies embedded in the cosmic dark energy background. The equilibrium and stability of polytropic spheres with equation of state of the matter P = Kpγ, γ = 1 + 1/n, in presence of a non-zero cosmological ...
Gennady S. Bisnovatyi-Kogan +2 more
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Kinematic stability of roller pairs in free rolling contact [PDF]
A set of generalized stability equations was developed for roller pairs in free rolling contact. A symmetric, dual contact model was used. Four possible external contact profiles that possess continuous contacting surfaces were studied. It was found that
Loewenthal, S. H., Savage, M.
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, 1999 A fluid jet with a finite angular velocity is subject to centripetal forces in addition to surface tension forces. At fixed angular momentum, centripetal forces become large when the radius of the jet goes to zero.
Brenner, Michael P., Eggers, Jens
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Circular Kinks on the Surface of Granular Material Rotated in a Tilted Spinning Bucket
, 1999 We find that circular kinks form on the surface of granular material when the axis of rotation is tilted more than the angle of internal friction of the material.
A. Medina +15 more
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AN INJECTIVITY RADIUS ESTIMATE AND STABILITY OF MINIMAL SUBMANIFOLDS
Kyushu Journal of Mathematics, 1997 Various criteria under which a region \(\Delta \) in a minimal submanifold is stable have been found. Here, the authors choose to call a region \(\Delta \) stable if it is infinitesimally stable, i.e., the second variation operator for the volume functional is positive definite on the space of all variation fields on \(\Delta\).
Coghlan, Leslie, Itokawa, Yoe
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Applied SciencesA battery track engineering vehicle faces challenges such as derailment and other safety concerns when navigating an R20m minimum radius curve, primarily owing to its low vertical and horizontal stabilities.
Yang Shen +3 more
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Advances in Civil Engineering, 2018 The deformation and failure of tunnel surrounding rock is the result of tunnel excavation disturbance and rock stress release. When the local stress of surrounding rock exceeds the elastic limit of rock mass, the plastic analysis of surrounding rock must
MingZheng Zhu +3 more
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Multiple D4-D2-D0 on the Conifold and Wall-crossing with the Flop
, 2010 We study the wall-crossing phenomena of D4-D2-D0 bound states with two units of D4-brane charge on the resolved conifold. We identify the walls of marginal stability and evaluate the discrete changes of the BPS indices by using the Kontsevich-Soibelman ...
A Collinucci +26 more
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The stability radius of linear operator pencils
, 2000 Let T and S be two bounded linear operators from Banach spaces X into Y and suppose that T is Fredholm and the stability number k(T;S) is 0. Let d(T;S) be the supremum of all r > 0 such that dim N(T- S) and codim R(T- S) are constant for all with | | < r. It was proved in 1980 by H. Bart and D.C. Lay that d(T;S) = \lim_{n\to\infty} _{n}(T;S)
Badea, C., Mbekhta, M.
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European Physical Journal C: Particles and Fields, 2017 A new solution satisfying the Karmarkar condition is presented here. We were first to have discovered a hypergeometric function metric potential representing embedding class I spacetime.
Piyali Bhar +3 more
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