国内社交媒体用户持续使用研究现状

[目的/意义]对国内社交媒体用户持续使用行为研究文献进行梳理与总结,以把握国内用户持续使用研究的发展动态。[方法/过程]以CSSCI期刊库2012-2018年发表的社交媒体用户持续使用行为研究论文为研究对象,从相关理论和模型、因果分析框架、未来研究方向三方面剖析国内社交媒体用户持续使用研究现状。[结果/结论]研究发现：采用的理论模型最多的是信息系统持续使用模型及其扩展模型,其次是技术接受模型。本文提出了一个社交媒体用户持续使用行为研究的因果关系分析框架,将纷繁复杂的前因变量、中介变量、调节变量和结果变量都囊括其中。最后指出了未来研究方向。     

社交网站用户交互学习行为影响因素的实证分析

用户交互学习作为网络用户的深层次需求,对社交网站的运营与发展至关重要。基于社交网站环境、用户特征,构建社交网站用户交互学习行为影响因素的模型,通过问卷调查,运用Spss和Lisrel8．7对该模型验证性分析,其社交网站用户偏好、社交网站功能、社交网站信息资源质量、社交网站用户的有用感知、社交网站用户人际关系以及社交网站激励机制对用户交互学习行为均有明显的正向影响。     

基于用户行为感知的移动社交网络信息服务持续使用意愿研究

[目的/意义]本文以用户行为感知视角，研究影响移动社交网络主导型用户与浏览型用户持续使用的因素，为移动社交网络信息服务提供理论基础，并为移动社交网络提供商提出参考与应用借鉴。[方法/过程]分析移动社交网络主导型用户与浏览型用户持续使用意愿影响因素，引入相关变量，构建了基于用户行为感知的移动社交网络信息服务持续使用意愿模型并提出假设，最后通过结构方程模型进行实证分析。[结果/结论]感知有用性、感知易用性、感知娱乐、感知质量等因素均显著影响主导型及浏览型两类用户；服务质量、感知风险、知识获取、个人创新、社会认可、感知信任、感知转换成本等因素对两类用户有不同程度的影响。     

政府门户网站的公众持续使用行为研究

信息系统的成功很大程度上取决于使用客体的持续使用行为.在Bhattacherjee的信息系统持续使用模型的基础上,引入了信任感知和娱乐感知两个内部变量和社交影响等四个外部影响因子,提出了政府门户网站持续使用模型假设,最后结合模型对我国政府门户网站建设现状提出了几点建议.     

移动社交媒体用户持续使用行为研究

[目的/意义]文章旨在探究移动社交媒体用户持续使用行为的影响因素及其相互关系,为移动社交媒体运营商提高用户满意度和忠诚度,增强用户黏性,洞察用户真正兴趣和心理需求,培养用户习惯等提供决策参考。[方法/过程]本文整合扩展的ECM-ISC模型、自我决定理论及习惯,构建移动社交媒体用户持续使用行为概念模型,提出研究假设并设计调查问卷;针对微信用户进行纸质问卷调查,共回收234份有效问卷,采用偏最小二乘法分析数据,在排除共同方法变异的影响下,对测量模型和结构模型进行评估,并对研究假设和调节效应进行验证。[结果/结论]结果显示,持续使用意愿和习惯直接影响移动社交媒体用户持续使用行为,习惯对持续使用意愿和行为之间有负向的调节作用;使用后感知有用性、满意度及自我功效正向显著影响持续使用意愿;期望确认度对使用后感知有用性和满意度产生直接影响;感知关系性和感知胜任性正向显著影响内在动机,内在动机对满意度正向影响显著,满意度对习惯产生直接影响。根据研究结论,对移动社交媒体（微信）运营商提出管理建议。     

从人口统计特征和生活方式探讨SNS社交网站用户的使用行为及其活跃度

作为Web2．0时代的新兴产物,SNS社交网站已经成为互联网领域最热门的话题。而如何提高网站的活跃度是众多SNS企业关注的话题之一。从实证角度研究了社交网站用户的生活方式和人口统计特征如何影响其使用行为,进而影响其活跃度。发现分享新鲜事和玩游戏这两项使用行为对社交网站用户的活跃度有显著影响,而用户的某些生活方式（如创新因子）和人口统计特征（如性别、年龄、职业）又会对用户的使用行为产生显著影响。为SNS企业识别和留住活跃用户提供了理论依据。     

基于社交网站采纳健康信息行为特点及其影响因素的实证研究

健康信息与人的生命质量息息相关,研究其在社交网站上的采纳特点和影响因素十分必要。然而关于使用社交网络获取健康知识这一行为的研究仅处于起步阶段,尚缺乏对网络用户基于社交网站采纳健康信息行为的深入认识和探讨。结合社会认知理论和现有的健康信息系统研究,选取若干具有代表性的因子建立结构方程模型,以了解国内网络用户基于社交网站采纳健康信息的行为特点和影响因素。通过探索性因子分析和验证性因子分析,实证结果证实了用户健康自我效能、健康关注、感知风险和感知信息支持显著影响了用户对SNS健康信息的采纳意向;同时感知信息支持、感知情感支持、健康关注及感知风险显著影响了用户的健康自我效能;感知风险受到用户信任倾向的显著影响。为今后针对社交网络获取健康知识的研究提供了理论模型上的借鉴,为采取针对性的干预措施提供科学合理的参考。     

SNS社交网络个人用户持续使用行为的影响因素研究

以SNS社交网络个人用户持续使用行为为研究对象,以信息系统持续使用理论为参考框架,整合计划行为理论,针对SNS的特点引入感知娱乐、感知信任及习惯,建立研究模型进行实证研究。研究结果表明:信息系统持续使用理论在SNS情境下有良好的适用性;主观规范和感知行为控制对用户的使用意向和实际使用行为影响显著;感知娱乐对满意度和持续使用意向影响显著;习惯对实际使用行为的影响及对持续使用意向和行为之间的调节效应显著。     

基于“关注者”关系的SNS病毒营销机制有效性研究

首次归纳并提出了病毒营销分享机制的三维度模型,并采用国内大型社交网站的用户行为数据,以HGLM方法验证了不同分享机制的作用效果。研究证实,在用户启发式的信息处理模式下,包含简单社会线索的分享机制反而更能有效地与用户建立持久和稳定的交往关系;由物质激励带来的工具关系虽然会在短期内迅速提高关注量,但同时也会加速关注量的衰退,表现为不稳定的关系状态;工具关系还对其他分享机制的影响存在一定的调节作用。     

隐私关注困扰下用户持续使用社交网络的动机解析

[目的/意义]社交网络已广泛渗入到人们的日常生活中,用户对所提供个人数据的隐私关注一直存在,但却依然持续使用社交网络,需要解析产生这种现象的原因。[方法/过程]运用社会影响理论,通过解析用户使用社交网络的隐私成本(即隐私关注)和隐私收益(即行为诱导:人际关系管理,自我展示,主观规范),建立隐私权衡模型,分析用户的隐私权衡行为,寻找隐私关注困扰下用户持续使用社交网络的动机。[结果/结论]用户提供个人数据并持续使用社交网络的动机并非是忽略了隐私关注,而是行为诱导(包括人际关系管理和自我展示)的正面影响超过隐私关注的负面影响。     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

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.     

Cooler temperatures inductive to locust outbreaks

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.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

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.     

Low doses of a red wine ingredient figh diabetes in mice

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.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

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.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

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.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

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.     

Prevalence of soft neurological signs in Chinese people

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.     

Molecular motor assembly of a biomimetic system

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.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence