Results 231 to 240 of about 50,546 (263)

Stabilization of Generic Trees of Strings

Journal of Dynamical and Control Systems, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ammari, Kais, Jellouli, Mohamed, Khenissi, Moez   +2 more
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Existence and stability of nontopological strings

Physical Review D, 1988
The existence of a class of nontopological ``string'' soliton solutions is demonstrated. The string consists of a long, thin region of false vacuum supported against collapse by the pressure of massless particles trapped in its interior. It is shown that the string configuration is stable against decay into free particles.
, Copeland, , Kolb, , Lee
openaire   +2 more sources

Perturbative Stability of Smooth Strings

Physical Review Letters, 1987
Polyakov's theory of surfaces embedded in Euclidean space-time with an extrinsic curvature term is stable under small fluctuations only if the number of dimensions is positive and less than 26.
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Gravitational stability of local strings

Physical Review Letters, 1987
The full coupled gravity-string field equations are considered and they are used to show that a general local string will have an asymptotically conical structure. For the case of the Abelian Higgs model with U(1) gauge invariance, the gravitational field of a simple local string to first order in Geta/sup 2/ is exhibited.
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Two-dimensional analysis of string stability of nonlinear vehicle strings

52nd IEEE Conference on Decision and Control, 2013
Stability of nonlinear 2D continuous-discrete systems is shown using Lyapunov stability theory and iISS. The proposed stability conditions are applicable with non-positive divergence of the Lyapunov function. The results are used to rigorously prove string stability of a nonlinear vehicle string with variable time headway.
Steffi Knorn, Richard H. Middleton
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Coordinated String Stability of Two Platoons

2019 IEEE Intelligent Transportation Systems Conference (ITSC), 2019
This paper investigates the longitudinal string stability of a platoon, which is constituted by two other platoons of two vehicles. String stability conditions in the frequency domain are derived for different inter-platoon communication topologies.
Jiazhi Song, Shaoshuai Mou
openaire   +1 more source

STABILITY OF A STRING INSPIRED INFLATIONARY SCENARIO

International Journal of Modern Physics D, 1998
We consider an inflationary model inspired in the low energy limit of string theory. In this model, the scale factor grows exponentially with time, while the scalar fields are time independent. A perturbation study is performed, and we establish the conditions for such a model to be stable or not.
Magalhães Batista, Carlos Eudardo, Fabris, Júlio César   +1 more
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Existence and stability of semilocal strings

Physical Review Letters, 1992
Summary: It has recently been shown that a certain model field theory (which gives the abelian Higgs model a global SU(2) symmetry by duplicating the scalar sector) possesses static finite-energy vortex solutions despite having a simply connected vacuum manifold.
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Adaptive Stabilization of a Kirchhoff Moving String

Journal of Dynamical and Control Systems, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Abdelkarim Kelleche, Nasser-eddine Tatar
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Existence and stability of nontopological fermion strings

Physical Review D, 1990
We demonstrate the existence of a class of nontopological fermion string solutions. The fermion configurations exist because of a nontrivial coupling between the fermions and a real scalar field, and their long, thin regions of false vacuum are supported against collapse by the pressure of massless particles trapped in the interior, rather than by the ...
, Shi, , Li
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