气相爆轰波沿胞格的动力学机理研究

建立了一种以子单元分析为基础，研究气相爆轰波沿胞格运动时的动力学机理的新方法。根据该子单元的性质和斜冲击波关系，首先推导了对撞前后前导冲击波沿胞格对称轴的马赫数之比和入射冲击波入射角及胞格几何性质的关系，求解了胞格结构中的三波点对撞问题。然后，采用爆炸波模拟前导冲击波的自持运动过程，求解气相爆轰波沿胞格的动力学过程,理论分析表明，气相爆轰波在胞格起点首先经历一个增长过程，然后才出现衰减。理论分析结果与实验和数值计算结果的比较表明符合得较好。

飞秒激光诱导玻璃功能微结构

玻璃是一种传统材料，通过利用外场对玻璃进行空间选择性的微结构调控，发挥微结构的协同效应、量子效应和干涉效应等，可以赋予玻璃高功能和全新性能。本文阐述了近年来发展迅速的飞秒激光与玻璃相互作用的特征，介绍了我们利用飞秒激光诱导折射率变化直写三维光波导、微光栅和光散射型光纤衰减器，进行活性离子（稀土、过渡和重金属离子）的价态操作及应用和发现的基于飞秒激光与玻璃非线性相互作用的偏振依赖的纳米光栅形成机制。

Transformando as velhas formas do viver: o desafio da permanência dos alunos adultos no ensino noturno

O presente trabalho tem como foco a questão da permanência dos alunos adultos do ensino noturno. Este estudo busca analisar as razões da permanência escolar entre os adultos, por meio do estudo de suas narrativas quanto às trajetórias de vida, expectativas escolares, razões de seu retorno à escola e os sonhos que acalentam sobre o universo escolar. É uma pesquisa, portanto, que se realiza com uma perspectiva qualitativa. Os alunos pesquisados participam da Escola Municipal Nísia Vilela Fernandes, escola da rede pública de Duque de Caxias, município da Baixada Fluminense, no Rio de Janeiro. A escola pesquisada oferece o ensino fundamental em 4 turnos (7h as 11h; 11h as 15h; 15h as 19h; 19h as 22h) onde a organização das anos iniciais e do ensino noturno é em ciclos. Os adultos, por conta da política educacional local, foram incluídos no ensino regular noturno como uma das estratégias de inclusão no financiamento do FUNDEF (atualmente estratégia desnecessária com a criação do FUNDEB). Por que os alunos pesquisados permanecem na escola? Quais os significados da escola para estes alunos em suas Histórias de Vida? Quais relações mantiveram com a escola enquanto crianças e jovens? Quais expectativas mantêm em relação ao processo de escolarização? Como rompem com os desafios familiares e profissionais para estarem na escola? Estas questões são trabalhadas com auxílio de conceitos como pobreza (SANTOS, Milton, 2008; SANTOS, Boaventura de Souza, 1995, 2007; TELLES, 2008), religiosidade (TEIXEIRA, 2006; MENEZES, 2006; NOVAES, 2006; LAHIRE, 2006/08; BOURDIEU, 1997/8/9, 2001;) e processo de socialização escolar (LAHIRE, 2006/08; DUBET, 2004/08; BOURDIEU 1997/8/9, 2001; FREIRE, 1979, 1981/8, 1991/3/4 e 2000)

GaAs基低密度量子点、量子环分子束外延生长

Submitted by zhangdi (zhangdi@red.semi.ac.cn) on 2009-04-13T11:45:31Z

Alpha decay energies and half-lives for possibly synthesized superheavy elements

We investigate the ground state properties of some superheavy nuclei, which may be synthesized in future experiments. Special emphases are placed on the alpha decay energies and half-lives. The alpha decay energies and half-lives from different theoretical models are compared and discussed comprehensively. Through these calculations and comparisons, the optimal superheavy elements to be synthesized in future experiments are proposed theoretically.

CfLGBP, a pattern recognition receptor in Chlamys farreri involved in the immune response against various bacteria

Lipopolysaccharide and beta-1, 3-glucan binding protein (LGBP) is a kind of pattern recognition receptor, which can recognize and bind LPS and beta-1, 3-glucan, and plays curial roles in the innate immune defense against Gram-negative bacteria and fungi. In this study, the functions of LGBP from Zhikong scallop Chlamys farreri performed in innate immunity were analyzed. Firstly, the mRNA expression of CfLGBP in hemocytes toward three typical PAMPS stimulation was examined by realtime PCR. It was up-regulated extremely (P < 0.01) post stimulation of LPS and beta-glucan, and also exhibited a moderate up-regulation (P < 0.01) after PGN injection. Further PAMPs binding assay with the polyclonal antibody specific for CfLGBP proved that the recombinant CfLGBP (designated as rCfLGBP) could bind not only LPS and beta-glucan, but also PGN in vitro. More importantly, rCfLGBP exhibited obvious agglutination activity towards Gram-negative bacteria Escherichia coil, Gram-positive bacteria Bacillus subtilis and fungi Pichia pastoris. Taking the results of immunofluorescence assay into account, which displayed CfLGBP was expressed specifically in the immune cells (hemocytes) and vulnerable organ (gill and mantle), we believed that LGBP in C farreri, serving as a multi-functional PRR, not only involved in the immune response against Gram-negative and fungi as LGBP in other invertebrates, but also played significant role in the event of anti-Gram-positive bacteria infection. As the first functional research of LGBP in mollusks, our study provided new implication into the innate immune defense mechanisms of C. farreri and mollusks. (C) 2010 Elsevier Ltd. All rights reserved.