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中国青铜器历史悠久,源远流长。特别是到了商代晚期,青铜制造业得到迅猛发展,进一步推动两周时期青铜器的发展,使中国的青铜文化达到高峰。其中,最引人注目的是青铜器纹饰,无愧于古代装饰艺术的典范。 相似文献
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中国古代青铜文明曾夸耀于世,遗留至今的青铜器数量众多,具有较高艺术价值的可举出不少,但一眼就能给人以强烈震撼的并非多见。现收藏于保利艺术博物馆的镇馆之宝——西周早期的神面卣,就是这样一件让人观后难以忘怀的青铜瑰宝。 卣本是中国古代盛酒的一种容器,形状与今天一般所见的提梁壶差不多,只是横剖面呈椭圆形而已;卣内盛酒,使用时打开 相似文献
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滇国青铜器是中国青铜器里的一只奇葩,代表着中国西南古滇民族的青铜文化.滇国扣饰造型丰富,技术精湛,堪称滇国青铜艺术的杰出代表.滇国扣饰的形式美是研究扣饰艺术的重要基础工作,通过对滇国扣饰形式的探讨,给读者一个启示以开拓更为广阔的研究领域. 相似文献
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近些年来，许多私人收藏者开始着眼于青铜器的收藏，对于青铜器的真伪识别，可能很多人难以把握。青铜器是一定历史时期的产物，它们主要是商、周、秦、汉时代的文化遗物，这些珍贵的青铜艺术精粹，展示了中国古代青铜冶铸技术从兴起发展至鼎盛繁荣的历程。作为现在的收藏爱好者在进行鉴定时需要丰厚的历史文物知识，而往往对此知之甚少者居多，使许多收藏者难以对青铜器的真伪作出辨别，为此损失惨重。我作为一名普通的文物文化工作者，现对青铜器的辨识和收藏浅谈一二以供爱好者参考。 相似文献
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以各种动物纹饰为主要特征的中国古代北方草原青铜艺术,是我国北方地区发展起来的一种草原文化,是以匈奴族为主体的我国古代北方诸部族共同创造的闪耀在草原上的一颗明珠.中国古代北方草原青铜艺术以其特有的艺术魅力而享誉世界,精品与佳作不胜枚举.而以构思奇妙的动物纹饰为主要风格的各种饰物,是草原青铜艺术篇章中最为精彩的一页. 相似文献
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根据历史文献及地方志和有关资料记载，以及贵州历年出土商用至秦汉时期的青铜器、青铜冶铸范模和青铜冶炼遗址，进行综合分析研究，阐述贵州古代夜郎地区青铜文化及青铜冶铸工艺的产生及发展，以及夜郎地区青铜文化的自身特点。 相似文献
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青铜器是中国古代文物最富有特色的门类之一,所有接触过辉煌的中华传统文化的人们,都认识到中国古代青铜器的重要历史价值和美术成就。青铜器在中国的萌生演进,绵延历几千年,其出土的范围几乎遍及各地,而陕西是发现青铜器最多的中心,自两千年前的西汉,即有获得青铜器的记录,随后史不绝书,近现代的发现为数更多。现代考古学在中国建立以后, 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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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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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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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):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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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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《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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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