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William Harper 《Quest (Human Kinetics)》2013,65(1):92-99
This paper contains an in-depth, three-part overview of the literature and ideas pertaining to professionalization of attitudes toward play. The first section focuses on the popular ideology which assumes that similar values are operative in both the sport world and the adult work world. The second part of the paper consists of a review and critique of the research and theory centering on value orientation and its relationship to age, athletic status, and gender. The last section contains an examination of the properties and assumptions of the Webb Scale and suggestions for scale improvement. The author attempts to show that thus far the existing research has failed to prove empirically (a) that significant differences in value orientation can be attributed to participation in athletics, and (b) that involvement in competitive sport socializes an athlete into the value system of the work world. The author also argues that the professionalization of attitudes is a complex and multidimensional phenomenon, a concept which has not been reflected in the measurement of such attitudes. 相似文献
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William J. Davis 《The Educational forum》2013,77(2):122-132
The goals of today's school athletic programs are vastly different from the original intentions of the administrators who established the first interscholastic athletic teams. For athletics to be anything more than a drain on school and taxpayer resources, these programs must undergo serious changes. 相似文献
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A pipelined architecture for distributed text query evaluation 总被引：1，自引：0，他引：1
Alistair Moffat William Webber Justin Zobel Ricardo Baeza-Yates 《Information Retrieval》2007,10(3):205-231
Two principal query-evaluation methodologies have been described for cluster-based implementation of distributed information
retrieval systems: document partitioning and term partitioning. In a document-partitioned system, each of the processors hosts
a subset of the documents in the collection, and executes every query against its local sub-collection. In a term-partitioned
system, each of the processors hosts a subset of the inverted lists that make up the index of the collection, and serves them
to a central machine as they are required for query evaluation.
In this paper we introduce a pipelined query-evaluation methodology, based on a term-partitioned index, in which partially
evaluated queries are passed amongst the set of processors that host the query terms. This arrangement retains the disk read
benefits of term partitioning, but more effectively shares the computational load. We compare the three methodologies experimentally,
and show that term distribution is inefficient and scales poorly. The new pipelined approach offers efficient memory utilization
and efficient use of disk accesses, but suffers from problems with load balancing between nodes. Until these problems are
resolved, document partitioning remains the preferred method.
Alistair Moffat was supported by the Australian Research Council, the ARC Special Research Center for Perceptive and Intelligent
Machines in Complex Environments, and the NICTA Victoria Laboratory.
William Webber and Justin Zobel were supported by the Australian Research Council.
Ricardo Baeza-Yates was supported by Grant P01-029-F from Millennium Initiative of Mideplan, Chile; and by the University
of Melbourne as a visiting scholar at the time this project was undertaken. 相似文献
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