Electron-electron interactions in general lead to both ground state and excited state confinement. We show, however, that in phenyl-substituted polyacetylenes electron-electron interactions cause enhanced delocalization of quasiparticles in the optically excited state from the backbone polyene chain into the phenyl groups, which in turn leads to enhanced confinement in the chain direction. This...

The dispersion properties of rod-type chirped photonic crystals (PhCs) and non-channeled transmission in the direction of the variation of structural parameters from one cell of such a PhC to another are studied. Two types of configurations that enable multiple slow waves but differ in the utilized chirping scheme are compared. It is demonstrated that the multiple, nearly flat bands with a grou...

Project supported by the Wang Faculty Fellowship at Peking University, Beijing, China, 2006-2007 through California State University (CSU) International Programs USA; the National Basic Research Program of China (Grant No 2007CB307004), the National High Technology Research and Development Program of China (Grant No 2006AA03A113), and the National Natural Science Foundation of China (Grant Nos ...

The dynamics and confinement of laser-created plumes expanding across a transverse magnetic field have been investigated. 1.06 microm, 8 ns pulses from a neodymium-doped yttrium aluminum garnet laser were used to create an aluminum plasma which was allowed to expand across a 0.64 T magnetic field. Fast photography, emission spectroscopy, and time of flight spectroscopy were used as diagnostic t...

Recently, the need to increase the strength of reinforced concrete members has become a subject that civil engineers are interested in tackling. Of the many proposed solutions, fiber-reinforced polymer (FRP) materials have attracted attention due to their superior properties, such as high strength-to-weight ratio, high energy absorption and excellent corrosion resistance. FRP wrapping of concre...

Magnetized laser-produced plasmas are central to many studies in laboratory astrophysics, inertial confinement fusion, and industrial applications. Here, we present the results of large-scale three-dimensional magnetohydrodynamic simulations dynamics a plasma expanding into transverse magnetic field with strength tens teslas. The show being confined by strong slender slab structured magnetized ...

Introduction. Dedekind has determined all groups whose subgroups are all normal (see, e.g., [5, Theorem 12.5.4]). Partially generalizing this, Wielandt showed that a finite group is nilpotent, if and only if all its subgroups are subnormal, and also if and only if all maximal subgroups are normal [5, Corollary 10.3.1, 10.3.4]. Huppert [7, Sätze 23, 24] has shown that if all 2nd-maximal subgroup...

We have reached our goal of implementing a computationally cheap algorithm for realtime rendering of realistic two-dimensional fire. The fire is simulated using computational fluid dynamics, vorticity confinement, and combustion modelling and visualized using black-body radiation. Small rotationally homogenous fires like torches and candles viewed in front are the best candidates when using thi...

The results on description of direct photon yields, transverse momentum spectra, and flow harmonics, measured in ultrarelativistic heavy-ion collisions at the Relativistic Heavy Ion Collider (RHIC) Large Hadron (LHC) for different collision centrality classes, analyzed within Integrated Hydrokinetic Model (iHKM) are reviewed. iHKM simulation results, corresponding to two opposite approaches mat...

varicella-zoster viruses complications involving the cns are estimated to occur rarely, transverse myelitis after varicella-zoster virus in most patients is characterized by an abrupt onset of progressive weakness and sensory disturbance in the lower extremities , like other viruses. we describe the case of 17 year-old boy who experienced cervical transverse myelitis after chickenpox with inabi...