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Measuring Search Engine Quality   总被引:12,自引:3,他引:9  
The effectiveness of twenty public search engines is evaluated using TREC-inspired methods and a set of 54 queries taken from real Web search logs. The World Wide Web is taken as the test collection and a combination of crawler and text retrieval system is evaluated. The engines are compared on a range of measures derivable from binary relevance judgments of the first seven live results returned. Statistical testing reveals a significant difference between engines and high intercorrelations between measures. Surprisingly, given the dynamic nature of the Web and the time elapsed, there is also a high correlation between results of this study and a previous study by Gordon and Pathak. For nearly all engines, there is a gradual decline in precision at increasing cutoff after some initial fluctuation. Performance of the engines as a group is found to be inferior to the group of participants in the TREC-8 Large Web task, although the best engines approach the median of those systems. Shortcomings of current Web search evaluation methodology are identified and recommendations are made for future improvements. In particular, the present study and its predecessors deal with queries which are assumed to derive from a need to find a selection of documents relevant to a topic. By contrast, real Web search reflects a range of other information need types which require different judging and different measures.  相似文献   
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This article addresses the notion of ‘making it’ as an early-career academic in physical education and sport pedagogy. In it, we draw on the tradition of material semiotics to reflect on our shared journeys from doctoral student to beginning scholar and beyond. By attuning ourselves to the relationality, materiality and precariousness of our experiences, we offer an answer to the question of what it takes to ‘make it’ as an early-career academic by advocating the practice of ‘making do’ or ‘doctoring.’ We develop this argument, first, by describing the narrative methods we used to conduct our inquiry and by explaining the material-semiotic ideas we used to explore the stories it generated. Then, we tell tales of our transitions from higher degree research student to early-career academic, focusing specifically on our ongoing, collective efforts to make do. In our discussion, we explore these narratives and attend to three features of our actions and activities as early-career academics; namely semiotic relationality, material heterogeneity and the precarious processes of heterogeneous engineering through which we sought to make a career in our field. We conclude by encouraging beginning scholars in physical education and sport pedagogy to become sensitive to these aspects of their own agency, and to experiment, experience and tinker together in ways that are attentive, inventive, caring and persistent.  相似文献   
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Research in Higher Education - Since the turn of the twenty-first century, going to college has become increasingly financially difficult in the United States. Tuition prices continued to rise,...  相似文献   
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Abstract

During the late-nineteenth century, imperial expansion increasingly produced what Louise Pratt terms ‘contact zones’ – ‘social spaces where cultures meet, clash and grapple with each other, often in contexts of highly asymmetrical relations of power’. Sport was one of the most visible spaces where this process took place. This paper uses the example of cricket in Samoa to demonstrate how different groups sought to control sport’s meaning amidst great uncertainty. Almost as soon as they began playing cricket, Samoans radically altered its method and meaning to create the distinctively Samoan game of kirikiti. This act established the cricket pitch as a ‘contested space’ between Samoans and foreigners, who were wary of kirikiti’s association with Samoan politics and customary exchange. As was the case in Samoa more generally, however, this struggle was not neatly divided between Samoans and foreigners. While missionaries and settlers portrayed the game as a threat, others – notably sailors and proponents of British influence – greeted it with relative enthusiasm. For their part, Samoans used the game to signal alignment with or against one or another Western power. Finally, Samoa’s growing ‘mixed-race’ community saw the game as a means of confirming their place in both the Samoan and European ‘worlds’.  相似文献   
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The role of the library is to assist citizens in skills development critical to national interest and empowerment as literacy ambassadors, in general. Specifically, the work by the Federal Geographic Data Committee (1994) indicates that spatial literacy is for every citizen and not just a set of workforce specialists. Hence, the use of maps in decision making and problem solving will become fundamental to all professions, including library professionals. Thus, a spatial literacy awareness and rationale for such as standard job ability is discussed as a future librarian workforce proficiency and knowledge transfer medium.  相似文献   
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Fishing tournaments are a common feature in recreational angling across a wide range of target species in both fresh and salt waters. Tournaments are organised for a number of purposes, including as commercial enterprises; as fund-raising initiatives for angling clubs; for economic development purposes (e.g. tourism); as well as improve participants' skill levels. Most tournaments are confined to geographically small areas and usually occur over a small number of days, which can mean a pulse of economically significant activity in the local area. This paper analyses the nature of expenditure associated with angling tournaments, including travel, food and accommodation, and angling-related expenditures as a function of socio-economic and angler characteristics. Analysis based on 106 tournaments across Ireland during 2013 finds a clear 80/20 segmentation between ‘high’- and ‘low’-spend anglers and that the segmentation occurs across all fish target species considered. The analysis also finds that British coarse anglers participating at Irish angling tournaments spend considerably more than other anglers irrespective of target species or angler country of origin.  相似文献   
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Educational objectives focus practice and dictate what happens in US classrooms. Currently, instructional objectives are privileged in K–12 schools over other forms of objectives, thereby marginalizing the implementation of some educational perspectives. We argue that objectives should be expanded to attend to the student experience, promoting a variety of practices to utilize in classroom operations. In so doing, we suggest an addition to the network of objectives: experience-based objectives. We review the history of objectives before presenting experience-based objectives as embodying 5 major shifts in thinking, and as actualized through four criteria.  相似文献   
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