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1.
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   

2.
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   

3.
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   

4.
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   

5.
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   

6.
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   

7.
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   

8.
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   

9.
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   

10.
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   

11.
<正>DING Zhongli,a distinguished geologist,Member and Vice President of CAS,was named new President of the University of the Chinese Academy of Sciences(UCAS)in Beijing on April 14,2014.DING graduated from the Department of Geology,Zhejiang University in 1982.He obtained his PhD from the former CAS Institute of Geology(today’s Institute of Geology and Geophysics)in 1988,and served as its director  相似文献   

12.
<正>The stern situation of the current outbreak of Ebola hemorrhagic fever has caught intensive attention from the leadership of CAS.With great concern,repeated instructions have been given,urging the CAS staff to actively provide ST support for emergency responses to potential invasion of this epidemic,drawing on its buildup in research on emerging and infectious diseases.  相似文献   

13.
<正>In September,soon after the reform plan was released,BCAS had the honor to invite Dr.POO Muming,director of the Institute of Neuroscience,who is also heading the CAS Center of Excellence in Brain Science,one of the first inaugurated centers of excellence in the Academy’s new structural landscape,to interpret the rationale and prospect of such a major initiative.The following is a QA between BCAS and Dr.Poo.  相似文献   

14.
胡琨  陈荣  吉久明 《现代情报》2017,37(7):144-150
中国高校的专利表现出了显著的重数量、轻维持的特征,非商业化的专利申请动机被认为是主要原因,有必要进行深入挖掘。本文探讨了商业化动机的概念,采用计量学方法,讨论了中国所有高校及华东理工大学、上海交通大学、东华大学3所高校的专利动机,并尝试主要以专利寿命为依据对商业化动机的强弱进行评估。研究发现,中国高校的专利不但平均寿命较短,而且在年费补贴结束时有大量的专利集中失效,反映了非商业化的动机广泛存在。改进考核评价体系,引入针对商业化的考核项目是可行的解决问题的方法。  相似文献   

15.
<正>April 2014 witnessed the inauguration of two SinoNepal joint centers at Tribhuvan University,Katmandu:the Third Pole Environment Kathmandu Center and the SinoNepal Joint Research Center for Geography.As a milestone in the history of scientific cooperation between the two neighboring countries,the new move showed the region’s determination to jointly address global challenges ranging from climate change,biodiversity preservation to the monitoring and management of natural hazards.The Third Pole Environment(TPE)Kathmandu Center was launched On April 7.Launched by CAS,the TPE program is dedicated to the study of the environment of the"Third Pole",a region centered on the Tibetan Plateau that  相似文献   

16.
<正>Preamble The entire spectrum of research forms a complex system where cultivating talent,increasing knowledge and promoting innovation are intertwined across all disciplines.Increasingly,the research community is linked to a much larger global framework involving the circulation of talent,results and discoveries among the various spheres of society.Within the global research system,the actions of GRC participants are crucial in promoting the attractiveness of research careers for new talents,as well as opportunities for professional career development for researchers in universities and research performing organisations.GRC  相似文献   

17.
<正>QIN Liping,a professor of geochemistry at the University of Science and Technology of China(USTC),was presented the 2014 Houtermans Medal by the European Association of Geochemistry in Sacramento in June.She is the fi rst Chinese to receive this award.QIN finished her undergraduate degree at USTC.After earning her PhD from the University of Chicago in 2007,she did her postdoc at the Carnegie Institution for Science in Washington,D.C.under a Carnegie Fellowship.Then she conducted research at the Lawrence Berkeley National Laboratory as a Geological Postdoctoral Fellow.In 2012,QIN was recruited by  相似文献   

18.
Saving energy is crucial to the survival of animals living in the cold regions of the world. A small marmot-like rodent from the Arctic is world champion when it comes to energy saving. According to YAN Jun from the CAS-MPG Partner Institute for Computational Biology in Shanghai, this makes the Arctic ground squirrel extremely suitable for studying the changes that occur at the molecular level during rodent hibernation. Based on this, the scientist and his colleagues aim to discover exactly how the animals can attain such dramatic reductions in their metabolic activity.  相似文献   

19.
<正>The Partner Group aims at research on hybrid systems built from two types of soft matter systems:water-soluble polymers and biomimetic membranes.The main goal of the group is to investigate the macromolecule-membrane interactions and their roles in the transformation of lipid bilayers in contact with aqueous polymer solutions.The experimental investigations are  相似文献   

20.
<正>For the last 2.5 million years,our planet has experienced cold and warm,millennia-long cycles that collectively have become known as the Ice Age.During cold periods,continental-scale ice sheets blanketed large tracts of the northern hemisphere.As the climate warmed up,these colossal glaciers receded,leaving Yosemite-like valleys and other majestic geologic features behind.The advance and retreat of the ice sheets also had a profound influence in the evolution and geographic distribution of many animals,including those that live today in the Arctic regions.A new study published online on June 11 in the Proceedings of the Royal Society B:Biological Sciences identifies a newly discovered 3-to 5-million-year-old  相似文献   

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