Results 271 to 280 of about 287,878 (297)

Moduli Stabilization and String Geometry

AIP Conference Proceedings, 2008
I describe recent progress in using conformal field theory techniques to describe the stabilization of moduli fields arising in compactifications of type IIB string theory to four dimensions.
Katrin Becker, José D. Edelstein, Nicolás Grandi, Carmen Núñez, Martin Schvellinger   +4 more
openaire   +1 more source

Dilaton stabilization in string cosmology. I

Astrophysics, 2000
A mechanism for stabilization of the dilaton field within the framework of low-energy string gravitation with loop corrections to the dilaton coupling function was proposed in the first part of this paper. The mechanism is based on the assumption that loop corrections generate a singular dilaton kinetic function for a certain value of the dilaton field.
openaire   +1 more source

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.
openaire   +3 more sources

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
openaire   +2 more sources

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
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
openaire   +2 more sources

Stability of Nonlinear Oscillations of Stretched Strings

The Journal of the Acoustical Society of America, 1969
The stability of damped forced vibrations and undamped free vibrations of stretched strings is investigated. The regions of stability for the forced vibrations are plotted in the amplitude-frequency plane. It is shown that undamped planar free vibrations are unstable.
openaire   +2 more sources

From homogeneous to heterogeneous traffic flows: Lp String stability under uncertain model parameters

Transportation Research Part B: Methodological, 2021
Marcello Montanino, Julien Monteil, Vincenzo Punzo   +2 more
exaly  

Energy-Based Analysis of String Stability in Vehicle Platoons

IEEE Transactions on Vehicular Technology, 2022
Chiedu Nnaji Mokogwu, Keyvan Hashtrudi-Zaad   +1 more
exaly  

String stability of vehicle platoons

2011
In recent years, highway capacity has become a limiting factor, regularly causing traffic jams. Obviously, the road capacity can be increased by decreasing the inter-vehicle following distance di . As a consequence, however, vehicle automation in longitudinal direction is required in order to still guarantee safety. To this end, Adaptive Cruise Control
Ploeg, J., Wouw, N. van de, Nijmeijer, H.   +2 more
openaire   +1 more source