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This article reviews the history of the phenomenon of Brownian motion, how it confirmed the molecular view of matter, and how it led to the invention of nonequilibrium statistical mechanics.  相似文献   
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This paper uses regression analysis to test if the universities performing less well according to Shanghai Jiao Tong University’s world universities league tables are able to catch up with the top performers, and to identify national and institutional factors that could affect this catching up process. We have constructed a dataset of 461 universities across 41 countries. We found consistent evidence of a moderate degree of catching up, especially amongst non-US universities. Larger universities as well as universities located in English speaking countries not only perform better on average, but also catch up more over 2003–2009. Universities located in lower income countries are also catching up more. The performance of private universities, as compared to that of public universities, varies substantially between the US and the other countries.  相似文献   
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IntroductionMicroRNAs are small, non-coding RNA molecules that are becoming popular biomarkers in several diseases. However, their low abundance in serum/plasma poses a challenge in exploiting their potential in clinics. Several commercial kits are available for rapid isolation of microRNA from plasma. However, reports guiding the selection of appropriate kits to study downstream assays are scarce. Hence, we compared four commercial kits to evaluate microRNA-extraction from plasma and provided a modified protocol that further improved the superior kit’s performance.Materials and methodsWe compared four kits (miRNeasy Serum/Plasma, miRNeasy Mini Kit from Qiagen; RNA-isolation, and Absolutely-RNA MicroRNA Kit from Agilent technologies) for quality and quantity of microRNA isolated, extraction efficiency, and cost-effectiveness. Bioanalyzer-based Agilent Small RNA kit was used to evaluate quality and quantity of microRNA. Extraction efficiency was evaluated by detection of four endogenous control microRNA using real-time-PCR. Further, we modified the manufacturer’s protocol for miRNeasy Serum/Plasma kit to improve yield.ResultsmiRNeasy Serum/Plasma kit outperformed the other three kits in microRNA-quality (P < 0.005) and yielded maximum microRNA-quantity. Recovery of endogenous control microRNA i.e. hsa-miR-24-3p, hsa-miR-191-5p, hsa-miR-423-5p and hsa-miR-484 was higher as well. Modification with the inclusion of a double elution step enhanced yield of microRNA extracted with miRNeasy Serum/Plasma kit significantly (P < 0.001).ConclusionWe demonstrated that miRNeasy Serum/Plasma kit outperforms other kits and can be reliably used with a limited plasma quantity. We have provided a modified microRNA-extraction protocol with improved microRNA output for downstream analyses.  相似文献   
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A growing body of research has shown that customized messages have certain advantages over non-customized ones such as being more memorable and more persuasive. However, most prior studies tested customization effects with American participants only. It remains a mystery in the literature how people from other cultures may process customized messages. The current article examined the effects of two types of customized information, tailored and targeted, through two studies. Thirty Chinese working professionals and students in the US participated in study 1 and 56 Asian students in Hong Kong participated in study 2. In both studies, participants' tendencies toward collectivistic and individualistic cultures were measured. It was found that more collectivism-oriented participants generated higher recall and more favorable attitudes toward targeted messages, whereas less collectivism-oriented participants generated higher recall and more favorable attitudes toward tailored messages.  相似文献   
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Two experiments were conducted to explore the contributions of sexual and violent images contained in movie previews on viewers' anticipated perceptions and enjoyment of previewed films. In neither study were portrayals of sex or violence directly associated with greater anticipated enjoyment. However, both studies provided evidence that sexual and violent portrayals may indirectly enhance viewers' enjoyment via perceptions of heightened suspense (Study 1) or heightened humor (Study 2). These results are discussed in terms of viewers' responses to media images of sexuality and violence, and the importance of these portrayals in the marketing of motion pictures.  相似文献   
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Rishi Sriram, T. Laine Scales, and Meghan Oster share how the assessment efforts of Baylor University's Engaged Learning Groups have led to effective advocating for program improvement as well as increased administrative support.  相似文献   
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