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永嘉之乱中原流民迁入河陇及北魏太延五年河西士族东迁平城,这两次移民事件,对河陇学术的影响截然不同,这种不同不仅仅局限在人口的迁出与迁入这一层面上。以移民迁入河陇来说,学者们所热衷于讨论的永嘉移民使中原学术转移保存于河陇说,实际上是对陈寅恪学术观点的误读。陈寅恪先生所论是指文化重心转移而非移民所带来的文化之转移。而河西士人东迁平城后,又因他们的境遇很差,对北魏的贡献也大打折扣。相反的,河西士族被竭泽式的迁出,对于河陇,特别是对河西学术的影响却是灾难性的,河陇地域学术五百多年以来所形成的士族模式和地域格局因之发生了转折。 相似文献
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In this paper we investigate the dynamics of chartsuccess in the U.K. pre-recorded popular music industryover the period 1980 to 1993 using the British albumchart listings. We find that the incidence of chartsuccess is substantially skewed to the right, whethermeasured by total weeks spent per artist, averageweeks spent per album, or the total number of albumslisted per artist. We subsequently investigatepossible determinants of the length of chart survivalof albums in order to determine what may be drivingthe observed skewness. Our results indicate that thetype of album, seasonal demand, and initial popularityplay an important role in ensuring continued chartlisting of an album. 相似文献
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Maria Rentetzi 《Minerva》2008,46(4):437-462
A fierce debate ensued after the announcement in 1913 in the U.S.A. that all rights and ownership of radium-bearing ores found
on public land would be reserved by the government. At stake was the State monopolization of radium that pitted powerful industrialists
with radium claims, mainly in the Colorado area, against the Bureau of Mines and prestigious physicians who wished to reserve
radium for medical uses. This article describes the strategies of one of the biggest U.S. radium industries that dominated
the radium market, created huge customer bases, and legitimized their role within the scientific community. In contrast to
the European “radium situation,” radium extraction, production, and marketing in the United States was controlled by the industry;
and industrial in-house research was clearly separate from that done in academic circles. The production of knowledge was
ready-made in the factory and was entangled with commercial orders and advertising patterns.
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