Now showing items 11-20 of 1362
Cosmic string in the van Stockum cylinder
(IOP Publishing Ltd, 2003-05-07)
The low density van Stockum dust solution is extended by including an angular deficit factor. The resulting model describes a rotating Gott–Hiscock string surrounded by an annular dust atmosphere. The interior spacetime ...
Instanton effects and linear-chiral duality
(IOP Publishing Ltd, 2004-05-01)
We discuss duality between the linear and chiral dilaton formulations, in the presence of super-Yang-Mills instanton corrections to the effective action. In contrast to previous work on the subject, our approach appeals ...
The influence of beam model differences in the comparison of dose calculation algorithms for lung cancer treatment planning
(IOP Publishing Ltd, 2005-03-07)
In this study, we show that beam model differences play an important role in the comparison of dose calculated with various algorithms for lung cancer treatment planning. These differences may impact the accurate correlation ...
Controlling the motion of interacting particles: Homogeneous systems and binary mixtures
(The American Institute of Physics, 2005-06)
We elaborate on recent results on the transport of interacting particles for both single-species and binary mixtures subject to an external driving on a ratchetlike asymmetric substrate. Moreover, we also briefly review ...
Holography, diffeomorphisms, and scaling violations in the CMB
(IOP Publishing Ltd, 2004-07-01)
We analyze diffeomorphism invariance in inflationary spacetimes regulated by a boundary at late time. We present the action for quadratic fluctuations in the presence of a boundary, and verify that it is gauge invariant ...
Brownian dynamics simulations with stiff finitely extensible nonlinear elastic-Fraenkel springs as approximations to rods in bead-rod models
(The American Institute of Physics, 2006-01-28)
A very stiff finitely extensible nonlinear elastic (FENE)-Fraenkel spring is proposed to replace the rigid rod in the bead-rod model. This allows the adoption of a fast predictor-corrector method so that large time steps ...
A soluble string theory of hadrons
(IOP Publishing Ltd, 2003-05-01)
We consider Penrose limits of the Klebanov-Strassler and Maldacena-Núñez holographic duals to N = 1 supersymmetric Yang-Mills. By focusing in on the IR region we obtain exactly solvable string theory models. These ...
Optical properties and structure characterization of sapphire after Ni ion implantation and annealing
(The American Institute of Physics, 2005-10-01)
Implantation of 64 keV64keV Ni ions to sapphire was conducted at room temperature to 1×1017 ions/cm21×1017ions∕cm2 with a current density of 55 or 10 μA/cm210μA∕cm2. Metallic Ni nanoparticles were formed with the 5 μA/cm25μA∕cm2 ...
Reduction of open membrane moduli
(IOP Publishing Ltd, 2002-02-01)
We perform a general reduction of the open membrane metric in a worldvolume direction of the M5-brane. Using reduction rules analogous to the bulk, we show that the open membrane metric leads to the standard open string ...
Self-assembled quantum dots: A study of strain energy and intersubband transitions
(The American Institute of Physics, 2002-11-15)
In this article we examine the strain energy and intersubband optical transitions in self-assembled dots on GaAs and InP substrates. On the GaAs substrate, in addition to the InAs/GaAs dots we examine strain compensated ...