Bright,dark and singular optical solitons in a power law media with fourth order dispersion

This study focuses on exact solutions of nonlinear Schrödinger equation in a power law media with fourth order dispersion. Jacobi elliptic functions will be used to carry out the integration of this equation. Bright, dark and singular optical soliton solutions are obtained as well as Jacobi elliptic function solutions.     

The Third Generation (e,e′K~+) A Hypernuclear Spectroscopy at Jlab

We are now preparing for the third generation (e,e′K~+) A hypernuclear spectroscopic experiment at Hall C,Jefferson Lab (USA).The goal of the experiment is the precise spectroscopy of hypernuclei in wide mass region.We have constructed a new high resolution electron spectrometer "HES" dedicated to (e,e′K~+) hypernuclear study in Japan and it was shipped to JLab in February,2008.We will discuss about the physics of the (e,e′K~+) hypernuclear study at JLab and report the current preparation status of the third generatrion experiment.     

Numerical modelling of continuous concrete box girder bridges considering construction stages

The aim of this study is to analyse the concrete continuous box girder bridges by considering segmentally construction stages through balanced cantilever method. Time-dependent material properties of concrete and steel are also taken into account. Budan Bridge is selected as a numerical example. The Bridge constructed with balanced cantilever method and located on Artvin–Erzurum highway, Turkey, at 55 + 729.00–56 + 079.00 km is modelled using SAP2000 program. Geometric nonlinearities are taken into consideration in the analysis using P-Delta and large displacement criterion. Time-dependent material properties are considered as compressive strength, aging, shrinkage and creep for concrete, and relaxation for steel. The structural behaviour of the bridge at different construction stages is examined. Variation of internal forces such as bending moment, shear forces and axial forces, and displacements for bridge deck and pier are given with detail.Analyses show that, to obtain real behaviour of concrete bridges, segmentally construction stage analysis using time dependent material properties and geometric nonlinearity should be considered, because construction period continue along time and loads may change during this period and after.     

Crystallization kinetics of basalt-based glass-ceramics for solid oxide fuel cell application

Journal of Thermal Analysis and Calorimetry - Solid oxide fuel cell (SOFC) is a very efficient and clean source of energy. The glass and glass-ceramics are the most suitable and compatible sealing...     

Photochemically prepared polysulfone/poly(ethylene glycol) amphiphilic networks and their biomolecule adsorption properties

Polysulfone/poly(ethylene glycol) amphiphilic networks were prepared via in situ photo-induced free radical crosslinking polymerization. First, the hydrophobic polysulfone diacrylate (PSU-DA) oligomer was synthesized by condensation polymerization and subsequent esterification processes. Then, the obtained oligomer was co-crosslinked with the hydrophilic poly(ethylene glycol) diacrylate (PEG-DA) or poly(ethylene glycol) methyl ether acrylate (PEG-MA) at different feed ratios. In the case of PEG-MA, the resulting network possessed dangling pendant hydrophilic chains on the crosslinked surface. The structure and the morphology of the membranes were characterized by attenuated total reflection infrared spectroscopy (ATR-IR) and scanning electron microscopy (SEM). The enhancement of surface hydrophilicity was investigated by water contact angle measurements. The biomolecule adsorption properties of these networks were also studied. The biomolecules easily adsorbed on the surface of the hydrophobic polysulfone networks whereas dangling hydrophilic chains on the surface prevented the adsorption of the biomolecules.     

Inclusion complexation of warfarin withβ-cyclodextrins and its influence on absorption kinetics of warfarin in rat

The inclusion complexes of warfarin withβ-cyclodextrin, 2-hydroxypropyl-β-CD and methyl-β-CD have been investigated in aqueous solution. The apparent binding constants of warfarin are found to be 542±19, 442±18 and 112±6M^?1 respectively, calculated from the increments in fluorescence emission of the drug. The influence of theβ-CDs on the absorption rate of the drug is investigated within situ experiments in a chronically isolated internal loop, in the small intestine of the rat. The first-order disappearance (absorption) rate constant decreases to 3.6×10^?4 min^?1 inβ-CD, to 5.0×10^?4 min^?1 in 2-hydroxypropyl-β-CD and to 1.4×10^?3 min^?1 in methyl-β-CD compared to 3.2×10^?3 min^?1 in isotonic phosphate buffer (pH=7.4) solution, all of them showing a good agreement with the percentage of free warfarin in their complexed solutions: 16%, 18% and 47% calculated, respectively.