济莱协作区体育产业的发展路径研究     

王汝斌  亓永顺 《体育科技文献通报》2015,(2)

文章通过走访面谈、问卷调查法和文献资料分析相结合的研究方法,并且在全面审视济莱协作区体育产业的现状和问题的情况下,提出了济莱协作区体育产业发展路径的对策与措施。  相似文献   

Age differences explain social class differences in students’ friendship at university: implications for transition and retention     

Mark Rubin  Chrysalis L. Wright 《Higher Education》2015,70(3):427-439

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Measurement of three-dimensional hand kinematics during swimming with a motion capture system: a feasibility study     

Tony Monnet  Mathias Samson  Anthony Bernard  Laurent David  Patrick Lacouture 《Sports Engineering》2014,17(3):171-181

Current trends in swimming biomechanics are focused on accurate measurements. Nowadays, reliable calibration methods have been proposed to reach an accuracy of about 1 mm on rigid structure. But the question remains about the final accuracy for three-dimensional hand kinematics measurement during the underwater phase of front crawl swimming. Furthermore, most research is based on manual tracking with two or more cameras. In this paper we propose a protocol to acquire three-dimensional hand kinematics when swimming in a specific pool with a motion analysis system behind windows. Results highlight the benefits of using such a system in terms of accuracy and feasibility: the time allowed for post-processing is ten times lower and the quantified improved accuracy is better than with manual tracking.  相似文献   

In memoriam Isabelle Liberman     

Hyla Rubin 《Reading and writing》1991,3(2):99-100

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Museums and galleries     

Bernard Casey  Philip Taylor  Jeremy Eckstein  Dominic Moody  Adrienne Muir  Catherine Shaw 《Cultural Trends》1995,7(25):19-45

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A study of results overlap and uniqueness among major Web search engines     

Amanda Spink  Bernard J. Jansen  Chris Blakely  Sherry Koshman 《Information processing & management》2006

The performance and capabilities of Web search engines is an important and significant area of research. Millions of people world wide use Web search engines very day. This paper reports the results of a major study examining the overlap among results retrieved by multiple Web search engines for a large set of more than 10,000 queries. Previous smaller studies have discussed a lack of overlap in results returned by Web search engines for the same queries. The goal of the current study was to conduct a large-scale study to measure the overlap of search results on the first result page (both non-sponsored and sponsored) across the four most popular Web search engines, at specific points in time using a large number of queries. The Web search engines included in the study were MSN Search, Google, Yahoo! and Ask Jeeves. Our study then compares these results with the first page results retrieved for the same queries by the metasearch engine Dogpile.com. Two sets of randomly selected user-entered queries, one set was 10,316 queries and the other 12,570 queries, from Infospace’s Dogpile.com search engine (the first set was from Dogpile, the second was from across the Infospace Network of search properties were submitted to the four single Web search engines). Findings show that the percent of total results unique to only one of the four Web search engines was 84.9%, shared by two of the three Web search engines was 11.4%, shared by three of the Web search engines was 2.6%, and shared by all four Web search engines was 1.1%. This small degree of overlap shows the significant difference in the way major Web search engines retrieve and rank results in response to given queries. Results point to the value of metasearch engines in Web retrieval to overcome the biases of individual search engines.  相似文献   

The Pell and the Poor: A Regression-Discontinuity Analysis of On-Time College Enrollment     

Rachel B. Rubin 《Research in higher education》2011,52(7):675-692

In this study, I capitalize on a natural experiment to examine the effect of federal Pell Grant eligibility on college enrollment for students who graduated from high school in spring 2004 and who completed the Free Application for Federal Student Aid (FAFSA). Data from the Education Longitudinal Study of 2002 are used to array students on the continuous Expected Family Contribution (EFC) variable, attained from the FAFSA, and divide them into two categories—those with an EFC at or below the federally designated amount for Pell eligibility, and those above. This regression-discontinuity approach allows me to measure whether students who vary regarding their Pell Grant eligibility, but who have essentially identical family incomes, differ in their college enrollment rates. I find no effect. While confirming prior studies examining the impact of the Pell Grant on college enrollment for traditional students, this finding remains inconsistent with findings on other need-based grants. This result suggests that the minimum Pell Grant amount, currently less than 10% of an average college’s tuition and fees, may be insufficient.  相似文献   

Medical students' attitudes toward the anatomy dissection room in relation to personality     

Plaisant O  Courtois R  Toussaint PJ  Mendelsohn GA  John OP  Delmas V  Moxham BJ 《Anatomical sciences education》2011,4(6):305-310

Assessment of the personalities of medical students could enable medical educators to formulate strategies for the best development of academic and clinical competencies. In this article, we focus on the experience of students in the anatomy dissecting room. While there have been many attempts to evaluate the emotional responses of medical students to human cadaveric dissection, there has been no investigation into how different personality traits affect the responses. The main hypothesis tested was that there is a relationship between personality traits and attitudes toward the dissection room. For the present study, a group of French medical students (n = 403; mean age 21.3 ± 1.6; 65.3% female) completed a "Big Five" personality inventory and a questionnaire to assess their attitudes in regard to human dissection. The findings are consistent with our hypothesis, in that we found a relationship between reporting anxiety and four of the "Big Five" dimensions (all except openness). The rated level of anxiety was positively correlated with negative affectivity, more strongly at the beginning than at the end of the course. There were significant gender differences in attitudes toward dissection. The findings are discussed in relation to the possibility of preparing students for the dissecting room experience and also in relation to the students' understanding of mortality issues.  相似文献   

Real time search on the web: Queries,topics, and economic value     

Bernard J. Jansen  Zhe Liu  Courtney Weaver  Gerry Campbell  Matthew Gregg 《Information processing & management》2011

Real time search is an increasingly important area of information seeking on the Web. In this research, we analyze 1,005,296 user interactions with a real time search engine over a 190 day period. Using query log analysis, we investigate searching behavior, categorize search topics, and measure the economic value of this real time search stream. We examine aggregate usage of the search engine, including number of users, queries, and terms. We then classify queries into subject categories using the Google Directory topical hierarchy. We next estimate the economic value of the real time search traffic using the Google AdWords keyword advertising platform. Results shows that 30% of the queries were unique (used only once in the entire dataset), which is low compared to traditional Web searching. Also, 60% of the search traffic comes from the search engine’s application program interface, indicating that real time search is heavily leveraged by other applications. There are many repeated queries over time via these application program interfaces, perhaps indicating both long term interest in a topic and the polling nature of real time queries. Concerning search topics, the most used terms dealt with technology, entertainment, and politics, reflecting both the temporal nature of the queries and, perhaps, an early adopter user-based. However, 36% of the queries indicate some geographical affinity, pointing to a location-based aspect to real time search. In terms of economic value, we calculate this real time search stream to be worth approximately US $33,000,000 (US $33 M) on the online advertising market at the time of the study. We discuss the implications for search engines and content providers as real time content increasingly enters the main stream as an information source.  相似文献   

“国际科学书系”与达尔文主义的传播     

莱特曼 《科学文化评论》2011,8(5):69-80

在本文中我考察了“国际科学书系”作为出版界的一个独特的试验,在它存在的过程中是否传播了达尔文主义关于科学与宗教的关系的观念。赫胥黎、丁铎尔、斯宾塞和尤曼斯是国际科学书系创办之初的关键人物,他们都是进化论的自然主义者,对于科学与宗教的关系共同持有一种复杂的看法。虽然国际科学书系最初是一个致力于传播进化论自然主义的出版项目,但我将论证,到19世纪80年代初,当该系列最初的创办者们丧失对它的控制时,一条新的路线方针被建立起来。  相似文献