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11.
中岛敦生平与创作有三个特点 ,其代表作《山月记》与中国唐代传奇小说《人虎传》比较 ,两者有六大不同点 ,主人公李征的形象有一定的含义  相似文献   
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Werner syndrome (WS) is a segmental progeroid syndrome in which patients display pleiotropic features of aging seen in the normal population. The advent of positional cloning in the 1990s markedly accelerated the identification of human disease-causing genes. In 1996, mutations in WRN, which was shown to encode a new, putative member of the family of RecQ DNA helicases, were identified in four patients as the cause of WS. Ten years after the identification of WRN, what have we learned about its role in WS, and its contribution to normal aging?  相似文献   
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This study assessed the health risks via inhalation and derived the occupational exposure limit (OEL) for the carbon nanotube (CNT) group rather than individual CNT material. We devised two methods: the integration of the intratracheal instillation (IT) data with the inhalation (IH) data, and the “biaxial approach.” A four‐week IH test and IT test were performed in rats exposed to representative materials to obtain the no observed adverse effect level, based on which the OEL was derived. We used the biaxial approach to conduct a relative toxicity assessment of six types of CNTs. An OEL of 0.03 mg/m3 was selected as the criterion for the CNT group. We proposed that the OEL be limited to 15 years. We adopted adaptive management, in which the values are reviewed whenever new data are obtained. The toxicity level was found to be correlated with the Brunauer‐Emmett‐Teller (BET)‐specific surface area (BET‐SSA) of CNT, suggesting the BET‐SSA to have potential for use in toxicity estimation. We used the published exposure data and measurement results of dustiness tests to compute the risk in relation to particle size at the workplace and showed that controlling micron‐sized respirable particles was of utmost importance. Our genotoxicity studies indicated that CNT did not directly interact with genetic materials. They supported the concept that, even if CNT is genotoxic, it is secondary genotoxicity mediated via a pathway of genotoxic damage resulting from oxidative DNA attack by free radicals generated during CNT‐elicited inflammation. Secondary genotoxicity appears to involve a threshold.  相似文献   
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A fundamental problem for all educational reform efforts is one of specifying in practical terms just what the reform requires of teachers and students. In addressing it, educational designers have introduced the term “accountability” to characterize something missing in classroom discourse. This term, however, held special significance in the writings of the American sociologist Harold Garfinkel. Livingston applied Garfinkel’s treatment of accountability to understanding the lived-work of doing mathematics, particularly proving work. We examine an 8th-grade student’s presentation during a Japanese geometry lesson as a proof-account. Within it we see elements of both classical and natural accountability placed on display.  相似文献   
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Abstract: What I will present here is mainly about the research I engaged in from 1988 until now, on the Chinese newcomers problem in the global city of Tokyo. From the community‐study point of view, I explored the migration process of Chinese newcomers from sojourning to settling. Migration processes of Chinese newcomers are different from those of old overseas Chinese in Japan. This paper presents the new immigration tendencies of Chinese newcomers. A transnational social space is forming between Japan and the places where immigrants come from. In the age of globalization, there will be new circumstances and formations of ethnic networks of Chinese newcomers at the global level. At present, both of these tendencies can be found in Japan's society. The process for Chinese newcomers to new overseas Chinese differs from that of the old overseas Chinese. In the near future, Japan may bring in some high‐level specialized personnel by adopting a method of welcoming immigrants. At the same time, new immigrants can also form a new transnational social space. The field research I have carried out on the Chinese newcomers during these ten years fully illustrates these points.  相似文献   
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Abstract

With the role of libraries evolving from warehousing data sources to controlling the dissemination of information sources, A&I (abstracting and indexing) information services must also evolve and play an equally important and challenging role. With over forty years of A&I publishing experience, CSA (formerly Cambridge Scientific Abstracts) has adapted A&I publishing methods to new technologies and Web-based publishing. The editorial basics of producing A&I journals and databases are unchanged; however, new production technologies, such as electronic feeds between primary and secondary publishers, electronic directory services, and machine-aided indexing, can provide efficiencies. Once just roadmaps pointing to information, A&I services are now conduits delivering information directly to the user. Serials Review 2003; 29:221–223.  相似文献   
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This paper theoretically studies how unfunded pay-as-you-go social security affects economic growth, the fertility rate, and welfare in a neoclassical growth model. In addition, this paper considers a more general form of child-rearing cost, which is a mixture of time and money. The first observation is that whether the fertility rate increases or not by the expansion of the pay-as-you-go social security depends on (1) the size of the monetary child-rearing cost relative to the time spent on child-rearing and (2) the current fertility and interest rate in laissez faire. The second observation is that income per worker can increase by an expansion in pay-as-you-go social security when the output elasticity of capital is sufficiently small and the payroll tax rate is high. The last finding is that welfare can be improved even though capital is underaccumulated in an economy.  相似文献   
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