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The Very Large Array (VLA) radio telescope which is presently under construction in central New Mexico is considered the highest priority new astronomical facility in the U.S.A. during the next decade. The instrument will consist of 27 separate parabolic antennas each of which will be movable along the arms of a Y-configuration. The technique of earth-rotation aperture synthesis will allow an aperture of 25 miles dia. to be synthesized. When the VLA is completed in 1981 it will be better than any other radio telescope, by one or two orders of magnitude, in terms of resolution, sensitivity and speed.  相似文献   
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In order to take multiple co-authorship appropriately into account, a straightforward modification of the Hirsch index was recently proposed. Fractionalised counting of the papers yields an appropriate measure which is called the hm-index. The effect of this procedure is compared in the present work with other variants of the h-index and found to be superior to the fractionalised counting of citations and to the normalization of the h-index with the average number of authors in the h-core. Three fictitious examples for model cases and one empirical case are analysed.  相似文献   
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This paper discusses the benefits of using Latent Class Analysis (LCA) versus K‐means Cluster Analysis or Hierarchical Clustering as a way to understand differences among visitors in museums, and is part of a larger research program directed toward improving the museum‐visit experience. For our comparison of LCA and K‐means Clustering, we use data collected from 190 visitors leaving the exhibition Against All Odds; Rescue at the Chilean Mine in the National Museum of Natural History in January 2012. For the comparison of LCA and Hierarchical Clustering, we use data from 312 visitors leaving the exhibition Elvis at 21 in the National Portrait Gallery in January 2011.  相似文献   
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Ethics and Information Technology - During the last decade there has been burgeoning research concerning the ways in which we should think of and apply the concept of responsibility for Artificial...  相似文献   
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This study frames the quality transition of Romanian business education embracing the role of students as clients and customers. In the first part of the study, responses from ninety‐four fourth‐year Romanian students provided a statistically significant gap between the level of importance of business competences and their level of preparation. The second part used content analysis to establish four major improvement themes: 1) new course specification; 2) pedagogical modification using practical applications; 3) course delivery improvement; and 4) university‐directed field experiences. The findings support the notion that Romanian students provide reliable and unique assessments of their education.  相似文献   
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December 1989 meant for the Romanian academie world the break off with the communist dogmaticism and the politics of indoctrination and also the possibility of installing a critical analysis and the continuity of the true values of Romanian universities. Two inquiries conducted in 1990 and 1991 among students and Professors revealed a strong contesting pathos (persons, teaching contents and methods. The entire educational System were contested) and also a true desire to find out the critical aspects which enhances a new ideology in the higher education System. Students and a part of the faculty have discovered expressions like “academic freedom” and “academie autonomy”. They started to use concepts like “change”, “academic democracy”, “social responsibility”. New expectations concerning the behavioural offer of Professors occurred. When defining the direction of this change, authors chose the expression “toward normality”. Indices of normality could be the assumption by the university of new functions and value orientations previously forgotten and abandoned, under the dictatorial system such as creation and diffusion of values, introduction of criteria of competence and morality in evaluating both academic status and behaviour of Professors.  相似文献   
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Abstract In 1999, the first author and his colleagues at the Smithsonian Institution published an article in Curator: The Museum Journal introducing research on the experiences visitors find satisfying in museums. Subsequent data collection has expanded on these findings, as this Research Note will elucidate. In general, the team found that experiences that visitors were looking forward to on entrance tended to have a distribution similar to that of the experiences they found satisfying on exit. The aim of this note is to present data that demonstrates this consistency, and to observe that visitors’ expectations that they would have certain types of experiences upon entering a museum or exhibition were a much larger factor in determining their responses than were minor differences in museum or exhibition content or presentation. In other words, on the whole they came in knowing what experiences they expected, and they left having found them, regardless of what museum personnel presented to them inside.  相似文献   
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