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1.
纳米技术孕育传感器革命 总被引：2，自引：0，他引：2
一、纳米技术与纳米薄膜压力传感器纳米技术是一门在纳米空间(0.1～100nm)内研究电子、原子和分子的运动规律及特性,通过操作单个原子以制造具有特定功能材料或器件为最终目的的崭新技术。由于纳米材料的新特征现象和引发的新技术,不仅涉及到当前科学技术的前沿研究,而且其应用也渗透到国民经济的各个部门,纳米技术由此被誉为“引导下次工业革命”的高新技术。目前,应用纳米技术研究开发纳米传感器,有两种情况:一是采用纳米结构的材料(包括粉粒状纳米材料和薄膜状的纳米材料)制作传感器;二是研究操作单个或多个纳米原子有序排列成所需结构而… 相似文献
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纳米技术是一种尖端技术，它将领导下一声产业革命。纳米原来只是一种计量单位，一纳米是一米的十亿分之一，一个中等原子的十几倍。自从扫描隧道显微镜发明后，世界上例诞生了一门以0.1至100纳米这样的尺度为研究对象的新学科。国际上确认，当物质的粒径在100纳米以下时，这种物质就可以称为纳米材料。纳米技术通过操纵原子、分子或原子团、分子团使其重新排列组合，形成新的物质，制造出具有新功能的机器。物质加工到100纳米以下尺寸时，往往产生既不同于微观原子、分子，也不同于宏观物质的超常规特性。纳米技术是一种材料技术。其发展的趋势之一就是将尺寸向越来越小的方向发展。所以，纳米技术正吸引越来越多科研人员的注意力。纳米技术不光改变着或即将改变着我们的生活，而且纳米技术还将使我国的传统产业焕发生机。 相似文献
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纳米是一个长度单位,指的是1米的10亿分之一。纳米技术,则是在纳米尺度（1～1000纳米之间）上研究物质的特性和相互作用,以及利用这些特性的技术。在纳米技术中,纳米材料是主要的研究对象与基础。 相似文献
4.
张丽珠 《科学学与科学技术管理》2001,22(2):77-78
一、纳米技术发展的新动态
纳米技术（nanoscaletechnology）是从80年代发展起来的一门崭新的高技术学科。它是在0.1～100nm尺度上研究自然界各种现象中原子、分子的行为与规律，以期在深化对客观世界认识的基础上，实现直接由人类按需要排布原子，创造出性能独特的产品。它是在现代物理学、化学和先进工程技术相结合基础上产生的多学科交叉的横断学科。纳米技术包括：纳米材料学、纳米电子学、纳米制造技术、纳米生物学、纳米显微学和纳米机械加工技术等。 相似文献
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纳米生物技术将纳米技术和生物技术相集成,将成为现代生物工程的重要组成部分,并将在生物医学、电子学、材料学、环境科学等诸多领域具有良好的应用前景。研究制备近红外发光的Yb生物纳米颗粒并研究其特性,具有重要意义。 相似文献
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纳米技术,是促进21世纪医学经济不断增长的助推器,它的巨大作用,可以使微电子学于20世纪后半叶对世界的影响相形见绌,而纳米技术,则是在纳米尺度上,研究物质结构的特性,通过利用纳米材料与组建,从中来实现智能作用和特有功能的高科技尖端技术。目前,这一高科技顶级技术,不仅受到了世界各个发达国家的广泛青睐,还给我国医学行业带来了革命性的变革。这里主要概述我国纳米生物医药的研究现状,以及发展前景,并提出一系列的相关看法和分析。 相似文献
7.
纳米伦理起源于人们对纳米技术风险的恐惧和担忧.迄今为止,纳米伦理经历了从最初的梳理纳米技术的伦理问题,到反思这些问题的可能后果,再到对反思的反思3个阶段,研究内容不仅涉及现实的、具体的层面,也包括未来的、概念性的以及评估的和管理的3个层面.文章指出,对纳米技术风险的恐惧与担忧源于纳米技术的中介性和不确定性,纳米伦理学的任务在于探索和构建纳米技术活动的伦理规范,促进纳米技术在全球伦理的框架下健康、可持续的发展,以让人们走出担忧和恐惧,寻求一个安全的未来. 相似文献
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未来的图书馆将是计算机技术、网络通讯技术和纳米技术三位一体的图书馆。而未来的计算机技术、网络技术发展与纳米技术不可分割。本文从纳米计算机、纳米信息存储材料、纳米网络、纳米图书馆的特征阐述纳米时代的图书馆。 相似文献
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近几年纳米技术成为一项新兴热门的研究方向,并在多个领域取得瞩目的成就。将纳米硅运用于质谱仪分析技术中是纳米技术的一个创新方向与发展前景。从纳米技术的背景和质谱仪的检测原理入手,详细说明了两者的创新结合方式与该项技术的实际运用和优点。 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
12.
《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
13.
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
14.
《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
15.
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
16.
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
17.
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
19.
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