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元记忆的研究是当前记忆研究的热点。学习困难儿童元记忆监测与控制特点的研究更是一个崭新的领域,本文从四个方面总结了该领域内的相关研究成果：（1）学困生元记忆监测控制水平;（2）学困生元记忆监测控制水平年龄发展特点;（3）学习困难儿童学习时间分配特点;（4）学习困难儿童元记忆与其记忆成绩的关系。 相似文献
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采用实验室研究范式,以两位数字为实验材料,以内地某民族高校大学生为被试,探讨了汉语言能力对其前瞻记忆的影响。研究结果（：1）汉语言能力对第一母语为藏语的被试前瞻记忆有显著影响。（2）前瞻记忆任务难度对被试的前瞻记忆有显著影响,特别是对汉语言能力弱的被试,由于在完成任务中不能很好地理解任务及其完成程序导致前瞻记忆成绩显著低于汉语言能力强者。汉语言能力和任务难度之间存在着交互作用。 相似文献
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[目的/意义]网络和信息技术的发展给信息环境带来变化,数据的来源日趋多源化,不同维度的科技数据反映的情报信息各有侧重,开展多维度科技数据的情报感知方法及研究是非常必要的。近年来,世界先进国家高度重视生命科学领域的相关研究工作,加强生命科学领域的前瞻部署和研究投资。因此,面向生命科学领域的科技发展前瞻研究具有现实意义。[方法/过程]基于情报感知的理念,分别从战略研发计划视角、科技项目研发投资和科技论文与专利3个维度,提出定量和定性相结合的情报感知方法进行科技发展前瞻研究和分析。研究所用的数据为可公开获取的开源数据,主要来源于互联网及科技文献数据库。[结果/结论]对3个维度真实有效科技数据进行分析,通过综合不同维度科技数据的分析结果和专家意见,最终得出生命科学领域科技发展前瞻研究的情报感知分析结论。 相似文献
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文章调研和分析了近年来包括我国在内的世界主要国家发布的35份纳米科技战略计划和报告。首先,从投资力度、科研人员、研发重心、平台建设、教育等角度分析了各国发展纳米科技发展前瞻或部署的共性。其次,鉴于各国的国情不同,分析了各国前瞻/部署的总体方向和实现目标的异同,主要分析了美国、日本、韩国、德国、欧盟、澳大利亚及中国在纳米科技战略部署上的特色和侧重。最后,通过对纳米科技发展前瞻/部署的深度挖掘和分析,将获取的35份报告中涉及的研究方向按照生物、环境、能源、器件与制造、测量、仪器设备、标准与安全等7个领域进行比较分析,发现各国较为重视纳米生物领域的研究,此领域在各国的纳米科技战略计划中多有涉及,而纳米标准与安全的相关研究战略则在较少国家的纳米战略计划中被提及。 相似文献
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为前瞻思考世界发展大势,统筹谋划中国及中科院院科技发展战略,2007年夏季。中科院启动了若干重要领域科技发展路线图战略研究。 相似文献
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贝尔纳奖以其广泛的影响力和学术权威性成为科学学研究领域的代表性奖项。在对贝尔纳奖获奖者及获奖成果（1981-2015）进行统计分析的研究中发现,贝尔纳奖获奖者具有研究地域集中,研究内容多路演进,研究领域存在较为广泛的跨学科性、获奖学者年龄普遍老龄化、取得重大科研成果以及科研成果获奖周期长等现象。透过这些现象,结合学科发展背景,可以较为客观地捋清科学学领域发展的历史沿革、研究进路以及科学学研究发展中形成的多种特点,有助于从科学史、科学与技术的联系、研究策略等多角度思考科学学研究的前瞻延展。, 贝尔纳奖以其广泛的影响力和学术权威性成为科学学研究领域的代表性奖项。在对贝尔纳奖获奖者及获奖成果（1981-2015）进行统计分析的研究中发现,贝尔纳奖获奖者具有研究地域集中,研究内容多路演进,研究领域存在较为广泛的跨学科性、获奖学者年龄普遍老龄化、取得重大科研成果以及科研成果获奖周期长等现象。透过这些现象,结合学科发展背景,可以较为客观地捋清科学学领域发展的历史沿革、研究进路以及科学学研究发展中形成的多种特点,有助于从科学史、科学与技术的联系、研究策略等多角度思考科学学研究的前瞻延展。 相似文献
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科技前瞻是科技发展战略研究的一种重要形式，是科技智库发挥决策服务支撑作用的重要体现。科技前瞻作为智库大规模研究问题，在研究过程中面临学科交叉性挑战、相互关联性挑战、政策实用性挑战、社会影响性挑战、创新性挑战、不确定性挑战等“六大挑战”，具有高度复杂性，亟待形成科学化、标准化研究范式，以保障高质量科技前瞻成效。文章在探讨科技前瞻国内外研究进展的基础上，提出智库双螺旋法对科技前瞻的思维指导、过程指导、操作指导，形成了规范化、体系化的科技前瞻研究思路和方法，以期为科技发展战略研究提供借鉴。 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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《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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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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《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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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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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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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
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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