浅析Z39.50协议在我国数字图书馆建设中的应用     

张秀兰  刘璇 《现代情报》2006,26(1):99-100

本文介绍了Z39．50协议及其在国内数字图书馆建设中的应用情况，分析了该协议在具体应用中存在的问题,并展望了Z39．50的发展前景。  相似文献   

Bullying,education and earnings: Evidence from the National Child Development Study     

Sarah Brown  Karl Taylor 《Economics of Education Review》2008

We explore the effect of bullying at school on the educational attainment of a sample of individuals drawn from the British National Child Development Study (NCDS). Our empirical findings suggest that school bullying has an adverse effect on human capital accumulation both at and beyond school. Moreover; the impact of bullying on educational attainment at age 16 is found to be similar in magnitude to class size effects. Furthermore, in contrast to class size effects, the adverse influence of bullying on educational attainment remains during adulthood. In addition, being bullied at school influences wages received during adulthood as well as indirectly influencing wages via educational attainment.  相似文献   

Ein Fremdenrecht für Wissenschaftler und Auslandsstudierende?     

Gerhard Muzak 《Zeitschrift für Hochschulrecht, Hochschulmanagement und Hochschulpolitik: zfhr》2007,6(3):67-73

Das Fremdenrechtspaket 2007 führte auch im Bereich des Aufenthalts von Studierenden und Wissenschaftlern zu einschneidenden ?nderungen. Von universit?rer Seite wird h?ufig kritisiert, die neuen – tendenziell restriktiveren – Regelungen beeintr?chtigen die Internationalit?t und Mobilit?t der ?sterreichischen Universit?ten. Der vorliegende Beitrag untersucht den Inhalt der einschl?gigen Regelungen, beleuchtet deren Auslegung durch die Praxis kritisch und zeigt auch aus rechtspolitischer Sicht m?gliche ?nderungsvorschl?ge auf.  相似文献   

泰山苋的名实问题   总被引：1，自引：0，他引：1  

李振宇  宋葆华  李法曾 《中国科学院研究生院学报》2002,40(4):383-384

发现泰山苋 A．taishanensis F．Z．Li et C．K．Ni即为源于美洲的合被苋 A．Polygonoides L .,故于归并。  相似文献   

大股东股权、经理自主权与公司绩效   总被引：6，自引：0，他引：6  

李有根  赵西萍 《中国软科学》2004,112(4):86-92

经理自主权是反映经理与董事会关系的制度安排集合。理论分析和实证数据表明,以职位权和报酬权测量的经理自主权指数随公司股权集中度提高而下降,呈凹函数形态。股权结构是影响公司绩效的外生变量,其机理在于改变经理自主权安排,从而影响公司绩效,但数据显示经理自主权作为中间变量的影响作用不显著。  相似文献   

A theoretical analysis of the role of social networks in entrepreneurship     

Dennis P. Leyden  Albert N. Link  Donald S. Siegel 《Research Policy》2014

Entrepreneurship involves innovation and uncertainty. We outline a theory of entrepreneurship, which highlights the importance of social networks in promoting innovation and reducing uncertainty. Our findings suggest that this “social” aspect of entrepreneurship increases the probability of entrepreneurial success. The results also lend credence to theories of entrepreneurship that suggest that entrepreneurial opportunities are formed endogenously by the entrepreneurs who create them. We also consider the public policy implications of our findings.  相似文献   

“当代中国政府与行政”“互联网+”课程改革路径探索     

陆筱璐 《教育教学论坛》2022,(10)

“当代中国政府与行政”作为公共管理学专业课程,是“z世代”目前公共管理学的必修课程。因此,亟待深入探索符合“Z世代”学习与表达的课堂方式,并借助现代互联网的各类技术,为教师和学生提供一些较为新颖的课堂模式。对课题前面的冲击与挑战深入分析,希望从根本上解决高校理论课程中存在的学生学习积极性差、学习成果转化率低及教育者的教学手段单一等问题,列举了三种“互联网+”语境下的课程改革路径,并提出了保证该路径顺利发展的相应保障措施,为高校相近课程实验教学模式改革提供参考。  相似文献   

利用"Z+Z"智能教育平台推进信息技术与数学课的整合   总被引：1，自引：0，他引：1  

乔贵春 《中国教育技术装备》2006,(7):22-25

“Z＋Z”智能教育平台的推出,给中国的数学教学带来了新的技术支持。从“Z＋Z”的特点出发．阐述“Z＋Z”的应用为数学课堂带来的变化,以及“Z＋Z”应用于数学课的三大功能,以更好地促进信息技术与数学课的整合。  相似文献   

Remarkable rate acceleration of SmI3-mediated iodination of acetates of Baylis-Hillman adducts in ionic liquid： facile synthesis of （Z）-allyl iodides     

Liu YK  Zheng H  Xu DQ  Xu ZY  Zhang YM 《Journal of Zhejiang University. Science. B》2006,7(3):193-197

Stereoselective transformation of Baylis-Hillman acetates I into corresponding （Z）-allyl iodides 2 has been achieved by treatment of I with samarium triiodide in THF. Remarkable rate acceleration of samarium triiodide-mediated iodination of 1 was found when ionic liquid 1-n-butyl-3-methyl-imidazolium tetrafluroborate （[bmim]BF4） was used as reaction media in stead of THF. This novel approach proceeds readily at 50 ℃ within a few minutes to afford （Z）-allyl iodides 2 in excellent yields. A mechanism involving stereoselective iodination of the acetates of Baylis-Hillman adducts by samarium triiodide is described, in which a six-membered ring transition state played a key role in the stereoselective formation of 2.  相似文献   

From symbolic values to symbolic innovation: Internet-memes and innovation     

Mickael Benaim 《Research Policy》2018,47(5):901-910

Innovation studies has largely focused on technological assets, while leaving other sources and forms of innovation less tackled. Among this neglected corpus, this article stresses the important role played by symbolic value in the consumption and production processes of innovative goods and services. I explore especially Internet-memes that represent iconic productions of the Internet ‘lead culture’, which embed significant symbolic values. This article therefore, refers to the economic sociology and innovation management literature to emphasise the force of these creations of symbolic value by culture-lead communities, through their production of Internet-memes. I argue that Internet-memes represent a widespread source of innovation in various sectors (from cultural industries to less expect ones like finance). While exploratory, the present study extends the debate on the nature of innovation, its symbolic and cultural aspects and its diffusion processes. It ultimately suggests potential new paths for innovation policies to tackle these new forms of innovations.  相似文献