Optically controlled one-dimensional photonic crystal structures for the THz range are studied both theoretically and experimentally. A GaAs:Cr layer constitutes a defect in the photonic crystals studied; its photoexcitation by 800 nm optical femtosecond pulses leads to the modulation of the THz beam. Since the THz field can be localized in the photoexcited layer of the photonic crystal, the inter

The local well-posedness of a generalized Camassa-Holm equation is established by means of Kato's theory for quasilinear evolution equations and two types of results for the blow-up of solutions with smooth initial data are given.

BACKGROUND: Studies in patients with peripheral arterial disease (PAD) have reported an association between inflammatory markers and severity of disease or worsening of symptoms. However, few have studied the prognostic significance of inflammatory markers in asymptomatic subjects, measured many years before the onset of symptomatic PAD requiring treatment (trPAD).MATERIAL AND METHODS: Five inflam

The objectives of the technical committee are to identify those properties and characteristics, which are of importance, survey the existing knowledge, evaluate the data and the relevant literature, suggest activity in areas not already covered and provide facilities for the dissemination of information in papers and by discussion. In this report the main features of the behaviour of steel at high

Laparoscopy and palpation offer only a rough estimate of the extent of endometriosis. Consequently, endometriosis involving the bowels and urinary tract is under-diagnosed. Bowel obstruction and retroperitoneal endometriosis with obstruction of the ureter are uncommon conditions, but awareness of them is important. Ureteric obstruction develops slowly from periureteral fibrosis and often results i

The aim of this thesis is to show how modal particles can be integrated into a modular description of language where grammar and pragmatics are seen as two independent but interacting modules. The modular approach is chosen because of the problems connected with a functional approach. On the syntactic level, it is assumed that modal particles are XPs. The fact that modal particles cannot occur alo

We have calculated band-edge energies for most combinations of zinc blende AlN, GaN, InN, GaP, GaAs, InP, InAs, GaSb, and InSb in which one material is strained to the other. Calculations were done for three different geometries (quantum wells, wires, and dots) and mean effective masses were computed in order to estimate confinement energies. For quantum wells, we have also calculated band-edges f

Abstract not available.

Abstract in French Opérant à 25 °C, on a étudié le comportement de la phase ternaire isotherme et de la structure des systèmes copolymère–eau–xylène amphiphiles de deux copolymères à trois blocs de poly(oxyde d'éthylène)–poly(oxyde de propylène) (PEO–PPO), (EO)4(PO)59(EO)4 et (EO)17(PO)59(EO)17. On a identifié les barrières des phases par RMN du 2H et par inspection sous de la lumière polarisée. OThe isothermal ternary phase behaviour and structure of amphiphilic copolymer-water-xylene systems was investigated for two poly(ethylene oxide)-poly(propylene oxide) (PEO-PPO) triblo k copolymers, (EO)(4)(PO)(59)(EO)(4) and (EO)(17)(PO)(59)(EO)(17), at 25degreesC. The phase boundaries were identified using H-2 NMR and inspection under polarized light. The microstructure and structural length scal

The process of selecting requirements for a release of a software product is challenging as the decision-making is based on uncertain predictions of customer value and development cost. This paper presents a method aimed at supporting software product development organisations in the identification of process improvement proposals to increase requirements selection quality. The method is based on