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基于资源依赖理论和风险理论，本文探讨了新创企业社会网络、风险承担与企业绩效的关系。基于138个新创企业样本数据、运用层级回归模型，验证了风险承担在社会网络与企业绩效之间的中介效应：新创企业风险承担在社会网络与企业绩效影响关系中的中介效应显著——风险承担部分中介社会网络规模对企业绩效的影响、完全中介网络强度对企业绩效的影响。此外，本研究还采用配置方法进一步探讨不确定性环境下新创企业社会网络影响风险承担的作用机制。研究结果表明：在技术不确定性环境下，社会网络正向影响风险承担的效应显著增强；市场不确定性对两者关系的调节效应不显著。本研究的理论探讨和实证发现为探索社会网络对风险承担、企业绩效的作用机制提供了新思路，对创业者也有重要的实践启示。 相似文献
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基于企业网络和知识资源的理论,以创业企业为研究对象,对长三角267个创业企业进行实证研究,深入探讨网络嵌入、知识整合与创新绩效的相互影响,认为创业企业的网络嵌入性有利于知识整合与创新绩效的提升,同时,知识管理的创新也将极大地优化企业的创新策略。 相似文献
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网络位置、跨界搜索与制造企业服务创新绩效 总被引：1，自引：0，他引：1
为破解开放式网络环境下制造企业服务创新困境,基于社会网络理论和组织搜索理论,采用层次回归分析法实证检验网络位置对制造企业服务创新绩效的作用机制。通过对313家中国制造企业的调研数据分析发现：网络位置对制造企业服务创新绩效有显著正向影响;跨界搜索在网络位置与制造企业服务创新绩效之间起部分中介作用;吸收能力不仅在跨界搜索与制造企业服务创新绩效的关系中起调节作用,而且正向调节了跨界搜索在网络位置与制造企业服务创新绩效间的中介作用。研究结论拓展了网络位置影响效果研究,进一步澄清了网络位置对制造企业服务创新绩效影响的过程机制和边界条件,对制造企业利用跨界搜索突破资源局限,快速推进服务创新具有一定启示。 相似文献
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在986个科技型海归创业企业调研样本的基础之上,基于科技型企业成长的生命周期视角,从个人和团队社会网络2个方面构建海归双重社会网络影响企业技术创新绩效的理论模型,动态分析科技型企业4个生命周期阶段中双重社会网络对企业技术创新绩效的作用机制。研究结果表明:海归双重社会网络对科技型企业技术创新绩效的作用路径有2条,资源获取与整合、创业学习和技术创新能力分别在其中起到中介作用;在企业不同的生命周期阶段下,海归双重社会网络对企业技术创新绩效的作用特征、作用重点以及作用机制存在显著的差异,并且海归双重社会网络中的团队社会网络的作用高于个人社会网络。 相似文献
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基于长三角制造业企业调查问卷,分析企业创新网络机理,利用结构方程模型考察了网络能力与企业创新网络、创新绩效之间的关系,以及网络能力的形成和作用机制。研究表明,企业内部资源要素对网络能力、创新网络和创新绩效有正向影响,学习能力对网络能力、创新网络和创新绩效的影响不大;网络能力对资源内部要素、学习能力与创新网络的关系具有中介作用,企业内部资源要素和学习能力通过网络能力影响创新网络和创新绩效,资源内部要素和学习能力是网络能力形成的来源。 相似文献
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基于珠三角130家企业的问卷调查数据,实证分析了企业联盟网络特征对其创新绩效的影响以及外部环境不确定性、内部资源与能力的调节效应。研究结果表明,企业联盟网络的关系强度对其创新绩效具有显著的正向影响;企业在其联盟网络中占据的中心性位置对其创新绩效也具有显著的正向影响;外部环境不确定性正向调节企业联盟网络的关系强度与其创新绩效间的正向关系;内部资源与能力负向调节企业在其联盟网络中占据的中心性位置与其创新绩效间的正向关系。 相似文献
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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
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Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献