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robin-boundary-condition
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Lower bounds for the blow-up time of nonlinear parabolic problems with robin boundary conditions
, Article Electronic Journal of Differential Equations ; Vol. 2014 , April , 2014 ; ISSN: 10726691 ; Hesaaraki, M ; Sharif University of Technology
Abstract
In this article, we find a lower bound for the blow-up time of solutions to some nonlinear parabolic equations under Robin boundary conditions in bounded domains of Rn
Casimir effect in domain wall formation
, Article International Journal of Modern Physics A ; Volume 18, Issue 23 , 2003 , Pages 4285-4293 ; 0217751X (ISSN) ; Sharif University of Technology
2003
Abstract
The Casimir forces on two parallel plates in conformally flat de Sitter background due to conformally coupled massless scalar field satisfying mixed boundary conditions on the plates is investigated. In the general case of mixed boundary conditions formulae are derived for the vacuum expectation values of the energy-momentum tensor and vacuum forces acting on boundaries. Different cosmological constants are assumed for the space between and outside of the plates to have general results applicable to the case of domain wall formations in the early universe