Now showing items 171-177 of 177
Regularity of critical invariant circles of the standard nontwist map
(IOP Publishing Ltd, 2005-05-01)
We study critical invariant circles of several noble rotation numbers at the edge of break-up for an area-preserving map of the cylinder, which violates the twist condition.These circles admit essentially unique parametrizations ...
Type II string theory and modularity
(IOP Publishing Ltd, 2005-08-01)
This paper, in a sense, completes a series of three papers. In the previous two [1],[2], we have explored the possibility of refining the K-theory partition function in type II string theories using elliptic cohomology. ...
Surveying standard model flux vacua on T6/ℤ2 × ℤ2
(IOP Publishing Ltd, 2005-09-01)
We consider the SU (2)L × SU(2)R Standard Model brane embedding in an orientifold of T6/ℤ2 × ℤ2. Within defined limits, we construct all such Standard Model brane embeddings and determine the relative number of flux ...
Azimuthal clumping instabilities in a ZZ-pinch wire array
(The American Institute of Physics, 2005-05)
A simple model is constructed to evaluate the temporal evolution of azimuthal clumping instabilities in a cylindrical array of current-carrying wires. An analytic scaling law is derived, which shows that randomly seeded ...
The C4 clustering algorithm: clusters of galaxies in the Sloan Digital Sky Survey
(Univ Chicago Press, 2005-09)
We present the C4 Cluster Catalog, a new sample of 748 clusters of galaxies identified in the spectroscopic sample of the Second Data Release (DR2) of the Sloan Digital Sky Survey (SDSS). The C4 cluster-finding algorithm ...
Memory effects and magnetic interactions in a γ‐Fe2O3γ‐Fe2O3 nanoparticle system
(The American Institute of Physics, 2005-05-15)
The low-temperature dynamics of a magnetic nanoparticle system (γ‐Fe2O3γ‐Fe2O3—alginate nanocomposite with average particle size around 4 nm4nm) have been studied by superconducting quantum interference device measurements. ...
Laser based synchrotron radiation
(The American Institute of Physics, 2005-02)
Beams of x rays in the kiloelectronvolt energy range have been produced from laser-matter interaction. Here, energetic electrons are accelerated by a laser wakefield, and experience betatron oscillations in an ion channel ...