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文章从信息性社会影响和规范性社会影响视角,构建综合性问答网站用户信息采纳意愿的影响因素研究模型,并通过问卷调查和结构方程建模方法进行实证分析。结果表明：信息可信度和信息有用性对用户信息采纳意愿具有直接显著的正向影响,且信息可信度的作用更强。从信息性社会影响视角,发现信息质量和信源可信度是影响用户感知信息可信度和信息有用性的关键因素;从规范性社会影响视角,发现信息一致性对信息可信度产生显著的正向影响,信息评级正向显著影响信息有用性,而对信息可信度的影响不显著。 相似文献
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网络学术信息获取可信度感知的用户信息行为研究 总被引：1，自引：0，他引：1
文章综合了国内外研究现状,分析信息获取全过程三阶段影响因素,研究了用户信息行为对网络学术信息有效获取和合理利用的影响与作用,提出了用户可信度感知判据指标.采用分析对比的方法,通过典型案例的分析,得出的结论是:网络学术信息获取取决于用户的可信度感知,可信度感知的认识程度支配用户的信息行为,用户的信息行为决定网络学术信息有效获取和合理利用的最终结果. 相似文献
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【目的/意义】揭示用户在“互联网+”背景下的信息获取及利用规律,预测信息需求情况的发展趋势,重构 高校图书馆协同服务机制,形成主动化、个性化和智能化的服务范式。【方法/过程】运用灰色模型和Matlab拟合模 型两种数据拟合方法对高校用户信息行为的动态关系进行定量研究,对比分析两种模型的拟合结果,根据其特有 的内在规律作出必要的简化假设,掌握高校用户的信息行为动态,在本质上影响协同服务机制中各参与因素的结 构调整。【结果/结论】提出用户终端与移动终端相协同的PC-MT协同服务机制,包括信息需求响应机制、知识组织 与传输机制和服务评价与反馈机制,创新服务模式,提高服务效益和用户满意度。 相似文献
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从实体行为可信性的主观角度出发,针对传统主观逻辑理论没有考虑主观评测结果随时间动态变化的问题,提出对主观逻辑理论进行动态化多维扩展的思想,将传统的二维观点空间扩展为多维动态观点空间.在综合考虑实体行为的声誉和风险的基础上构建起实体可信度评价体系,提出一个基于主观逻辑扩展的实体行为动态可信评测模型.实验结果表明,该模型对实体恶意行为的反应更加灵敏,检测更加准确,抑制更加有效. 相似文献
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用户兴趣本体弥补了基于关键词的用户兴趣模型不能从语义上表达用户兴趣的缺陷,但大多是利用领域本体来构建,很难反映用户多方面和潜在兴趣,并且构建领域本体也是一个难点。本文据此提出一种基于词汇同现的用户兴趣本体构建方法。根据网页浏览记录找到用户兴趣网页集,经过数据处理将其转换成用户兴趣文本集。以TFIDF为指标抽取概念,词汇同现统计提取概念间关系,运用无尺度K-中心点聚类算法对其调整,将有关联用户的本体合并得到多用户本体,该本体能在语义上更全面反映用户兴趣并发现潜在兴趣。 相似文献
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针对重大疫情应急科研的紧迫性、重要性、时效性和协作性的特点,将协同主体、协同任务、协同要素、协同机制、协同绩效和支撑要素等多元协同维度纳入统一的分析框架和逻辑体系,构建多元协同的应急科研协同创新机制;然后将DEMATEL法和网络层次分析(ANP)法进行融合,建立基于DEMATEL-ANP模型的模糊综合评价模型,对重大疫情环境下的应急科研协同活动进行动态评价;并以新型冠状病毒(2019-nCoV)抗体检测试剂盒研发项目为实践案例,对其应急科研协同程度进行测度和评价。研究结果表明,基于DEMATEL-ANP模型的模糊综合评价模型科学有效,能够对重大疫情应急科研协同程度进行精准和动态评价。 相似文献
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针对重大传染病疫情应急科研的紧迫性、重要性、时效性和协作性的特点,将协同主体、协同任务、协同要素、协同机制、协同绩效和支撑要素等多元协同维度纳入统一的分析框架和逻辑体系,构建多元协同的应急科研协同创新机制;然后将DEMATEL法和网络层次分析(ANP)法进行融合,建立基于DEMATEL-ANP模型的模糊综合评价模型,对重大传染病疫情环境下的应急科研协同活动进行动态评价;并以新型冠状病毒（2019-nCoV）抗体检测试剂盒研发为实践案例,对其应急科研协同程度进行测度和评价。研究结果表明,基于DEMATEL-ANP模型的模糊综合评价模型科学有效,能够对重大传染病疫情应急科研协同程度进行精准和动态评价。 相似文献
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由于网络用户数据呈现稀疏状导致对用户信任值评价控制不准确,难以实现有效推荐。传统方法中使用语义Web结合协同过滤方法进行用户信任网络控制,在协同过滤中由于冷启动和不确定时延导致相似用户发现较为困难。提出一种基于Lyapunov稳定性理论的用户信任度评价渐进控制算法,完成用户信任网络控制器设计,并进行用户推荐模型构建,实现对用户信任度的准确评价。仿真实验表明,使用该算法和模型进行网络交易用户信任评价,能解决评价系统中存在的不确定误差、干扰和时滞等问题,用户推荐模型鲁棒性好。 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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《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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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)
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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Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
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Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
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Leah A. Lievrouw 《The Information Society》1998,14(2):83-96
The main premise of this article is that in information societies generally, and in virtual social contexts particularly, a distinctive style of interaction to facilitate the communication of difference, heterotopic communication , has emerged. It rests on two cultural foundations: an ideological belief in the positive, socially integrating power of communication, and a prevailing ethic of instrumental rationality, subjective individualism, and strategically practiced self-interest. The former is demonstrated by the use of simulation and spectacle as sources of information; exhibitionism/voyeurism as a communicative style; and the awareness of surveillance. The latter is seen in the competitive use of knowledge as a commodity; a surface globalism masking deep parochialism; lateral as well as vertical information inequity; and the use of public versus private as strategies for engagement rather than as spaces. Those who engage in heterotopic communication resort to their 'own devices' both in the sense of personal agendas, strategies, interests, and interpretations, and in the form of the telecommunication tools that help realize them. These personal and technological devices allow individuals with the right educational and technical resources to avoid exposure to disagreement, difference, or other information that does not serve their direct purposes or reflect their particular views of the world; yet they also help convey the appearance of openness, availability, and cooperation. This style of interaction is used strategically in combination with information and communication technologies to gain social or economic advantages, but it may encourage social separatism and parochialism, inhibit the negotiation of disputes, and emphasize competing interests. 相似文献