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The evolution of physics teaching and research in the two most important Romanian intellectual centers Bucharest and Jassy is discussed. Three stages of historical development are reported: 1860–1890: teaching process is predominant; period of first laboratories setting-up; sporadic researches in Physics Departments of Universities; 1890–1940: appearance of small dedicated research centers around Universities (Meteorological, Seismological, Electrotechnical Institutes); after the World War II: founding of contemporary Physics Institutes, e.g. Institute of Atomic Physics, Bucharest. The recognition role played by the Romanian Academy (Scientifical Sessions and Journals) is mentioned. Short biographies of the most important professors-physicists from 1860 to 1940 are presented. Celebrations, in 1996, of one century from the first atomic physics experiment in Romania (a X-ray radiography by D. Hurmuzescu) and of the 100th birthday of H. Hulubei, the founder of modern Romanian Physics are discussed. 相似文献
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Bogdan Suchodolski 《比较教育学》1980,16(3):303-309
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We used approach/avoidance theory to develop a conceptual model of student attrition that we estimated using 262 first- and second-year students at a major midwestern research university. We found that we could use psychological theories to enhance our understanding of the retention process; that psychological and sociological factors accounted for 37 percent of the variance in student attrition; and that institutions can enhance retention by developing programs that increase appropriate academic and social approach behaviors and reduce avoidant behaviors.An earlier version of this paper was presented at the Annual Meeting of the Association for the Study of Higher Education, Pittsburgh, PA, November, 1994. 相似文献
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This paper examines several different approaches to exploiting structural information in semi-structured document categorization. The methods under consideration are designed for categorization of documents consisting of a collection of fields, or arbitrary tree-structured documents that can be adequately modeled with such a flat structure. The approaches range from trivial modifications of text modeling to more elaborate schemes, specifically tailored to structured documents. We combine these methods with three different text classification algorithms and evaluate their performance on four standard datasets containing different types of semi-structured documents. The best results were obtained with stacking, an approach in which predictions based on different structural components are combined by a meta classifier. A further improvement of this method is achieved by including the flat text model in the final prediction. 相似文献