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[目的/意义]探究认知风格对消费者网购信息搜寻效率的影响,为电子商务网站信息搜寻系统的个性化设计与优化提供借鉴。[方法/过程]运用E-prime软件和眼动设备开展两组复杂度不同的实验,对眼动参数、正确率、反应时等数据进行处理和分析,验证认知风格和任务复杂度对消费者网购模拟界面信息搜寻效率的影响差异。[结果/结论]任务复杂度对信息搜寻反应时和正确率影响显著;认知风格对信息搜寻反应时影响显著,对正确率影响不显著,且场独立型消费者的平均反应时和平均正确率均低于场依存型消费者;眼动指标中注视点、注视时间和回视次数能辅助解释消费者信息搜寻效率产生差异的原因。 相似文献
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文章从信息技术协作主体、交流方式、协作任务3个方面对信息技术协作进行研究.主要研究结果包括:小组会议和学术讨论会是有效的交流方式,即时通信工具是主要的简单问题的交流方式;协作中所应用的信息技术复杂度不高,但是边界繁杂,问题复杂度对协作进度产生影响;在协作中存在明显的知识共享. 相似文献
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连锁药店总部资源、物流活动与物流能力关系实证研究 总被引：1，自引：0，他引：1
以长株潭地区连锁药店为样本,通过问卷调查和统计方法对连锁药店总部资源、物流活动和物流能力进行分析。研究结论如下:连锁药店物流能力包括成本与服务能力、柔性能力和交货能力;不同的药店类型在连锁总部资源、物流活动和物流能力上具有显著差异;连锁总部资源部分通过总部物流活动对成本及服务能力和交货能力产生积极显著影响,连锁总部资源完全通过总部物流活动对柔性能力产生积极显著影响。在此基础上,提出连锁药店物流能力发展的建议。 相似文献
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只有被执行的战略才有可能带来企业的竞争优势,因此研究影响战略有效执行的因素具有较大的价值。实证研究结果表明：不考虑环境动态性因素,战略宣贯度、体系保障和资源保障对于战略执行的有效性具有积极显著的作用;环境动态性对影响因素与战略执行有效性之间关系的调节作用确实存在。 相似文献
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针对隐性知识的隐蔽性、非结构化等特点,借鉴经验学习和知识转移理论,从任务视角出发用仿真方法研究了任务分配策略、任务到达速率、不同复杂任务比重对隐性知识学习的作用机制。仿真结果表明,以知识增长为目的的学习策略最有利于隐性知识学习;以当前时间成本最小化为目的的策略会引起原有知识的损失;随机分配策略对隐性知识学习无显著作用。任务到达速率衡量了员工的任务压力,适当增加员工任务压力能够极大地促进隐性知识学习。不同复杂任务的比重通过影响整体任务复杂度而作用于隐性知识学习,且任务复杂度与隐性知识学习之间呈现倒U型关系,无论各种任务之间的比重如何,只要整体任务复杂度维持在适中水平,就可以显著促进隐性知识学习。 相似文献
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以某企业员工在整体社会网络中的结构特征和员工行为特征为研究对象,构建计量回归模型,分析员工在工作咨询网、工作讨论网、朋友网和电子邮件网的位置特征对员工的知识分享行为、任务绩效和关系绩效的影响.研究发现,员工知识分享行为受到员工咨询网程度中心度和个人IT能力的影响;员工的关系绩效受员工知识分享行为和员工IT能力的显著影响,而员工社会网络特征值对关系绩效的影响不显著;员工任务绩效受员工社会网络结构特征的显著影响,而员工的个人知识分享行为和IT能力对任务绩效没有显著影响.论文结论对国内企业通过员工社会网络结构的改善和优化来提升员工绩效具有积极的现实指导意义,同时,对传统经济学由于忽视经济个体所处的社会网络结构来解释经济个体行为所导致的研究局限做一个补充和拓展,以更好地解释现实. 相似文献
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文章研究结果显示,随着企业自身发展周期的变化,企业所结成的价值网是变化的,企业持续创业过程中的核心资源和核心能力的需求也是随之变化的。对于处于创建期的新企业,关系嵌入对企业绩效产生主要的积极的影响;对于成长期企业,企业价值网关系嵌入与企业价值网结构嵌入共同对企业绩效产生显著的积极的影响;对于处于成熟期的创业企业,关系嵌入与结构嵌入对企业绩效都不产生积极的影响;对于处于蜕变期的企业,关系嵌入与结构嵌入对企业绩效都产生积极的影响。这些研究结果为大数据背景下创业企业价值网嵌入选择方法上的创新提供了决策依据和方法指导。 相似文献
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员工社会网络特征对员工知识分享行为和绩效的影响——来自珠江三角洲某企业的案例研究 总被引：1，自引：0，他引：1
以某企业员工在整体社会网络中的结构特征和员工行为特征为研究对象,构建计量回归模型,分析员工在工作咨询网、工作讨论网、朋友网和电子邮件网的位置特征对员工的知识分享行为、任务绩效和关系绩效的影响.研究发现,员工知识分享行为受到员工咨询网程度中心度和个人IT能力的影响;员工的关系绩效受员工知识分享行为和员工IT能力的显著影响,而员工社会网络特征值对关系绩效的影响不显著;员工任务绩效受员工社会网络结构特征的显著影响,而员工的个人知识分享行为和IT能力对任务绩效没有显著影响.论文结论对国内企业通过员工社会网络结构的改善和优化来提升员工绩效具有积极的现实指导意义,同时,对传统经济学由于忽视经济个体所处的社会网络结构来解释经济个体行为所导致的研究局限做一个补充和拓展,以更好地解释现实. 相似文献
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本文就知识型团队的网络结构、知识整合以及团队绩效之间的关系进行了实证研究.研究表明:知识整合对团队绩效有显著的积极影响;工具性社会网络密度对知识整合有显著的积极影响;工具性社会网络非中心度对知识整合有U型的影响关系;信任对于知识整合具有显著的积极影响;信任在情感性社会网络密度和网络非中心度对知识整合的作用中起到完全的中介作用.在此基础上,提出了对管理实践的启示和建议. 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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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):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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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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《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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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