网上免费英文图书情报学专业信息源评介

论文分类介绍了网上免费的英文图书情报学专业信息源,包括机构及学术网站、开放获取期刊、学术会议、科研项目网站、博客及邮件组、讨论组等。     

信用风险传染模型对债务抵押债权定价影响的比较研究

当前爆发的次贷危机是一种典型的信用违约传染的实例.到目前为止,专家学者尝试从不同角度为违约传染建模,但由于模型不同,产生违约时间的分布不同,直接影响了信用衍生品组合的定价.债务抵押债权(以下简称CDO)就成为次贷危机的主要导线.选择有代表性的三个违约传染模型:相关资产价值模型、信息驱使模型和强度违约模型,运用蒙特卡罗随机模拟的方式,比较由于模型选择的不同对信用衍生品组合定价的影响.     

美国2007年最佳免费参考网站评介

论文评介了美国图书馆协会下属机构机器辅助参考部(MARS)评选出的美国2007年最佳免费参考网站,并简述了历年的评介.     

高压氧对急性力竭性运动后血脂质过氧化物和超氧化物歧化酶代谢的影响

为了探讨ＨＢＯ对力竭性运动后机体氧自由基代谢的影响，让２０名体育系男大学生在自行车功率计上运动至力竭，然后随机分成ＨＢＯ组和对照组，他们分别在ＨＢＯ和自然状态下恢复约１２０Ｍｉｎ。在运动前、运动后和运动后２小时（恢复期）测定血清ＬＰＯ含量和ＳＯＤ活力。实验结果表明：短时间的力竭性运动使机体氧自由基的产生和清除处于一种高水平状态，并不破坏其平衡；适当的ＨＢＯ可以提高机体清除氧自由基的能力，有利于运动疲劳的恢复。     

番茄红素的生理特性及其在运动中的应用前景

番茄红素具有抗氧化、消除人体自由基等优越的生理功能,是一种很有发展前途的功能性天然色素。番茄红素在预防人类的某些癌症和其他疾病发生方面起着重要的作用。通过对番茄红素的理化性质、生物合成、吸收分布、提取分析、生理功能、生产应用等方面的研究及应用前景综合分析,认为番茄红素对于提高人体运动能力等方面有着较高的价值和作用。     

The Effects of Targeted Instruction and Other Interventions on the Interlibrary Loan Use Patterns of Historians and Their Students

Prior to this study, the Access Services Librarian systematically improved interlibrary loan (ILL) and related services offered by the R. Barbara Gitenstein Library of The College of New Jersey (TCNJ). She and her staff reviewed and revised workflows even as the Humanities Librarian focused on instructional efforts to further drive ILL use. Patrons’ confidence in ILL expanded. Requests for non-returnables, primarily journal articles and book chapters delivered electronically and within twenty-four hours, increased significantly. Returnables now arrive on average within six business days, more than double the speed previously achieved. Despite vastly improved turnaround times for all material types and efforts to boost users’ awareness of those improvements, faculty members affiliated with the History Department whose students rely on printed monographs told us that they remained reluctant to initiate ILL requests. Moving beyond anecdote, the Humanities and Access Services Librarians surveyed TCNJ historians and their capstone students on attitudes toward and use of ILL. Survey results are cross-referenced with ILL use statistics to aggregate reality versus perception among study participants. Changes in target patrons’ use of, confidence in, and feelings about TCNJ ILL over time are described.     

Language Difference and Communication Policy in the Information Age

This study argues that language difference is an important, though often neglected, element in contemporary flows of audiovisual media and organizations' efforts to influence them through policy. Because linguistic issues overlap a number of policy areas, including trade, culture, language, and communication, this study advocates for increased attention to language-related concerns within and across those areas by policymakers and researchers alike. Various developments associated with globalization have contributed to the significance of the transnational media trade, and are discussed in light of language difference. Special emphasis is given the handling of language in media by the European Union and North American Free Trade Agreement, two trade regimes that have treated language difference distinctly. The probable expansion of both trade regimes is likely to increase the salience of linguistic diversity among participant societies in the future.     

新信息环境下专业图书馆联盟与服务体系建设——以中国科学院专业图书馆联盟为例

中国科学院系统拥有大量的专业图书馆集群,因此讨论新信息环境下的专业图书馆联盟建设以中国科学院专业图书馆联盟为例最具有代表性。文章首先论述了中科院专业图书馆联盟的发展历程;其次通过对新信息环境下中科院专业图书馆联盟三大服务体系——文献传递与馆际互借体系、文献资源集团采购体系和学科化服务体系的介绍,使我们清楚地看到,联盟体系的建设使联盟内各成员馆的资源、资金和服务都得到了有效的外延;文章最后论述了中科院专业图书馆联盟未来的发展趋势。     

Teacher education,graduates’ teaching commitment and entrance into the teaching profession

This study aimed to gain insight into the relationship between teacher education and graduating teachers (not) starting in the teaching profession (n=209). Predictor variables referred to teacher education, integration into teaching, and teaching commitment. To examine interrelationships between these variables, factors were also interlinked to test a theoretical model of graduates’ teaching commitment. Results reveal that graduates’ teaching commitment is strongly related to their entrance into the teaching profession. Furthermore, the perception of mentor teachers’ evaluative support is directly related to teaching commitment and other variables (e.g. faculty support, type of teacher training) are indirectly related through the mediation with graduates’ teacher efficacy and professional orientation.