Holographic characterization of chain photopolymerization

A holographic characterization technique is developed in accordance with a general photopolymerization model. The technique allows detailed quantification of the chemical parameters, including their variation from the Trommsdorff effect. The holographic procedure is especially suited for studying the diffusion of the chemical reactants

Amplitude-equation formalism for four-wave-mixing geometry with transmission gratings

An amplitude equation is derived for a four-wave-mixing geometry with nearly counterpropagating, mutually incoherent, nondiffracting pump beams, spatially overlapping in a photorefractive material with a nonlocal response. This equation extends the earlier linear two-dimensional theory to the weakly nonlinear regime. The analysis also starts from a more complete equation for the photorefractive effect, which leads to the prediction of novel effects especially apparent in the nonlinear regime. Precise predictions for the spatiotemporal behavior of the grating amplitude in the nonlinear regime are presented. The range of validity of the amplitude equation is studied. The characteristics of the instability in the nonlinear regime are analyzed through a front-selection analysis

Transition to an oscillator for double phase-conjugate mirror

Summary form only given. Some of the novel quantified characteristics for double phase conjugate mirrors are analysed including the effects of the nonlinearity on the critical dynamics (approach to saturation) and on the spatial distribution of the grating (large scale distortion of the beams and conjugation fidelity) and sensitivity to noise (seeding). The approach used also clarifies the question of linear instability and predicts a new transition to an oscillatory regime

Gender differences in item format and skill area: Some evidence from an EFL acheievement test

Cataloged from PDF version of article.The present study investigated the extent to which male and female language learners’ scores on achievement tests vary according to item format and skill areas. The statistical analysis of data from one achievement test administered to 303 pre-intermediate level students indicated that males and females’ scores showed differences in both item format and skill areas. While females outperformed males significantly with ‘find the correct form’ and ‘paragraph writing’ questions, males did not show any superiority in any item format. Females also outperformed males in three skill areas; ‘writing’ ‘grammar’ and ‘vocabulary’ while males scored higher only in ‘listening’. Possible reasons behind these differences between males and females’ scores can benefit future researchers, language teachers, and administrators in terms of theoretical and practical perspectives. © Association of Gazi Foreign Language Teaching. All rights reserve

Vergi usul kanunundan uluslararasi finansal raporlama standartlarina dogru : finansal tablolarin yolculugu

While the independent auditing in publicly-held corporations was made in accordance with Serial X No:11 Communique of the Capital Market Law until 2005 pursuant to CML, then the regulatory authorities (Banking Regulation and Supervision Agency, BRSA - Undersecretariat of Treasury and Energy Market Regulatory Authority, etc.) led by the Capital Market Board ordered independent audit to be made over the financial statements prepared in accordance with the International Financial Reporting Standards within the framework of union acquis. Basically, all the companies in Turkey are obliged to prepare their financial statements in accordance with the provisions of Tax Procedure Law (TPL). Companies subject to supreme regulatory authorities led by publicly-held corporations subject to Capital Market Law are obliged to submit some correction and classification records while preparing their financial statements in accordance with International Financial Reporting Standards (IFRS) after the preparation of financial statements in accordance with the Tax Procedure Law; and generally these accounting records are provided by majority of the companies not over the accounting information system but outside accounting.peer-reviewe

Multimodal person recognition for human-vehicle interaction

Next-generation vehicles will undoubtedly feature biometric person recognition as part of an effort to improve the driving experience. Today's technology prevents such systems from operating satisfactorily under adverse conditions. A proposed framework for achieving person recognition successfully combines different biometric modalities, borne out in two case studies

A Search for Vector Diquarks at the CERN LHC

Resonant production of the first generation vector diquarks at the CERN Large Hadron Collider (LHC) is investigated. It is shown that the LHC will be able to discover vector diquarks with masses up to 9 TeV for quark-diquark-quark coupling alpha_(D)=0.1 and 4 TeV for alpha_(D)=5x10^(-4).Comment: 9 pages, 4 tables, 4 figure

Measurement of the Permanent Electric Dipole Moment of the 129^{129}Xe Atom

We report on a new measurement of the CP-violating permanent Electric Dipole Moment (EDM) of the neutral $^{129}$Xe atom. Our experimental approach is based on the detection of the free precession of co-located nuclear spin-polarized $^3$He and $^{129}$Xe samples. The EDM measurement sensitivity benefits strongly from long spin coherence times of several hours achieved in diluted gases and homogeneous weak magnetic fields of about 400~nT. A finite EDM is indicated by a change in the precession frequency, as an electric field is periodically reversed with respect to the magnetic guiding field. Our result, $\left(-4.7\pm6.4\right)\cdot 10^{-28}$ ecm, is consistent with zero and is used to place a new upper limit on the $^{129}$Xe EDM: $|d_\text{Xe}|<1.5 \cdot 10^{-27}$ ecm (95% C.L.). We also discuss the implications of this result for various CP-violating observables as they relate to theories of physics beyond the standard model

Self-written waveguides in photopolymerizable resins

We study the optically-induced growth and interaction of self-written waveguides in a photopolymerizable resin. We investigate experimentally how the interaction depends on the mutual coherence and relative power of the input beams, and suggest an improved analytical model that describes the growth of single self-written waveguides and the main features of their interaction in photosensitive materials.Comment: 3 pages, 3 figure