Development of the heterogeneous catalysts for the production of levulinic acid from furfuryl alcohol

207 p.

Value of information in product recovery decisions: A Bayesian approach

There is a widespread recognition of the need for better information sharing and provision to improve the viability of end-of-life (EOL) product recovery operations. The emergence of automated data capture and sharing technologies such as RFID, sensors and networked databases has enhanced the ability to make product information; available to recoverers, which will help them make better decisions regarding the choice of recovery option for EOL products. However, these technologies come with a cost attached to it, and hence the question 'what is its value?' is critical. This paper presents a probabilistic approach to model product recovery decisions and extends the concept of Bayes' factor for quantifying the impact of product information on the effectiveness of these decisions. Further, we provide a quantitative examination of the factors that influence the value of product information, this value depends on three factors: (i) penalties for Type I and Type II errors of judgement regarding product quality; (ii) prevalent uncertainty regarding product quality and (iii) the strength of the information to support/contradict the belief. Furthermore, we show that information is not valuable under all circumstances and derive conditions for achieving a positive value of information. © 2010 Taylor & Francis.

Optical properties of ZnO thin film on gamma-LiAlO2 substrate grown by pulsed laser deposition

Optical properties were investigated of ZnO thin films grown oil (100) gamma-LiAlO2 (LAO) substrates by pulsed laser deposition method. C-axis oriented ZnO film was grown oil (100) LAO substrate at the substrate temperature of 550 degrees C. The transmittances of the films were over 85%. Peaks attributed to excitons were seen in the absorption spectra, indicating that the thin films have high crystallinity. Photoluminescence spectra were observed at room temperature; the peak at 550 urn is ascribed to oxygen vacancies in the ZnO films caused by the diffusion of Li from the substrate into the film during deposition. (c) 2005 Elsevier B.V. All rights reserved.

Spectroscopic properties of Nd3+:(La,Sr)(Al,Ta)O-3 crystal

A new laser crystal Nd3+:(La, Sr)(Al, Ta)O-3 (abbreviated as Nd3+:LSAT) has been grown by the conventional Czochralski method. The absorption and luminescence spectra of trivalent neodymium in Nd3+:LSAT crystal were measured at room temperature. The value of absorption and emission cross-section was calculated. The Judd-Ofelt analysis was applied to the crystal to get the phenomenological parameters (Omega(i), i = 2,4,6), the line strengths, the radiative transition rates, the branching ratios and the radiative lifetime. (C) 2006 Elsevier B.V. All rights reserved.

Troca do ponto pela vírgula e da vírgula pelo ponto em redações de vestibular

A presente pesquisa objetiva investigar em que contextos ocorrem a troca do ponto pela vírgula e da vírgula pelo ponto em redações de vestibular. Este estudo foi buscar seu referencial teórico-metodológico numa teoria gramatical cientificamente fundamentada, bem como na Linguística do Texto, Análise do Discurso e Estilística. As perspectivas em relação à linguagem advindas do movimento teórico no interior da linguística tiveram consequências diretas na questão do ensino, motivando a construção deste estudo. Para fins de análise, serviram como corpus duzentas redações do vestibular da UERJ 2007/2008, além de alguns poucos textos de alunos de primeiro período de uma instituição de ensino particular em que a autora trabalha que mostraram-se interessantes para a análise. A pesquisa evidenciou que a troca da vírgula pelo ponto, de maneira geral, acarretou erro, possibilitando a formulação de regras; e a do ponto pela vírgula concentrou-se na esfera do estilisticamente desejável, favorecendo a formulação de conselhos. Os dados da análise serviram como referente básico para sugestões metodológicas com ressonância prática para os docentes em sala de aula