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Web searchers commonly have difficulties crafting queries to fulfill their information needs; even after they are able to craft a query, they often find it challenging to evaluate the results of their Web searches. Sources of these problems include the lack of support for constructing and refining queries, and the static nature of the list-based representations of Web search results. WordBars has been developed to assist users in their Web search and exploration tasks. This system provides a visual representation of the frequencies of the terms found in the first 100 document surrogates returned from an initial query, in the form of a histogram. Exploration of the search results is supported through term selection in the histogram, resulting in a re-sorting of the search results based on the use of the selected terms in the document surrogates. Terms from the histogram can be easily added or removed from the query, generating a new set of search results. Examples illustrate how WordBars can provide valuable support for query refinement and search results exploration, both when vague and specific initial queries are provided. User evaluations with both expert and intermediate Web searchers illustrate the benefits of the interactive exploration features of WordBars in terms of effectiveness as well as subjective measures. Although differences were found in the demographics of these two user groups, both were able to benefit from the features of WordBars. 相似文献
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Hegemonic masculinity would suggest that sport fandom is the exclusive domain of men and women are subordinate. Yet, it is apparent that women make up a significant portion of the professional sport spectator market. As such, it is important to systematically examine the role of hegemonic masculinity in the female sport fan experience. The purpose of this paper was to document, explore, and reflect upon personal experiences of female sport fans using a collaborative self-ethnography approach. Over a period of 3 months, we documented our experiences attending professional sport events (e.g., Major League Baseball, Canadian Football League) in the United States and Canada. Analysis of the data occurred through a process of sharing and critical reflection of our narratives. We identified three common themes that defined our experiences as female sport fans: (a) negotiating our definition of being a sport fan, (b) female sport fan as “the outsider”, and (c) marginalisation of other women. Our work provides some insight into the lived experiences of female sport fans. Discussion of the findings is intended to shed light on the conversation regarding hegemonic masculinity within the sport fan literature. 相似文献
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Many of the approaches to image retrieval on the Web have their basis in text retrieval. However, when searchers are asked to describe their image needs, the resulting query is often short and potentially ambiguous. The solution we propose is to perform automatic query expansion using Wikipedia as the source knowledge base, resulting in a diversification of the search results. The outcome is a broad range of images that represent the various possible interpretations of the query. In order to assist the searcher in finding images that match their specific intentions for the query, we have developed an image organization method that uses both the conceptual information associated with each image, and the visual features extracted from the images. This, coupled with a hierarchical organization of the concepts, provides an interactive interface that takes advantage of the searchers’ abilities to recognize relevant concepts, filter and focus the search results based on these concepts, and visually identify relevant images while navigating within the image space. In this paper, we outline the key features of our image retrieval system (CIDER), and present the results of a preliminary user evaluation. The results of this study illustrate the potential benefits that CIDER can provide for searchers conducting image retrieval tasks. 相似文献
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Drawing on the methodology of critical incidents, this study sets out to explore the perspectives that 20 experienced in‐service mentors in Israel adopt towards critical incidents in their work, as they account for how they reason about and act upon these incidents. Mentors’ stories of critical incidents shed light on the complex nature of mentors’ professional expertise, reflected in the finding that experienced mentors’ reasoning and behaviour constantly fluctuates between a novice and an expert stage, depending upon the nature of the situation and the type of mentor–mentee interaction that the mentor is confronted with. The study supports the more dynamic, discontinuous and interactionist view of the acquisition of expertise, highlighting the regressions and progressions that play out when experienced professionals take up an additional role, such as in the passage from teaching to mentoring. 相似文献
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Cracks in the iceberg: surfacing the tensions of constructivist pedagogy in the context of mentoring
Lily Orland‐Barak 《Teachers and Teaching》2013,19(3):293-313
In this study, the reciprocity between educational reforms and the role of teachers is examined. A social-discursive approach to sense-making provides a theoretical framework for understanding how teachers position themselves within the context of a reform. To illustrate the utility of such an approach, the specific case of a teacher involved in reforms is presented. The results show an ongoing positioning process and this process to constitute both the input and output for the interaction between teacher and reforms. The development of sensitivity to this positioning process appears to be a necessary prerequisite for successful reforms. 相似文献
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Larena Hoeber 《Sport Management Review》2010,13(4):345-354
Our understandings of volunteering in sport can be challenged and broadened by examining the experiences of those whose volunteer efforts go unrecognized or unnoticed. In the mainstream sport system, one such under-represented and under-researched sector is the Aboriginal community. The purpose of this paper is to examine the experiences of Canadian Aboriginal individuals as sport volunteers. The paper is based on a re-analysis of data collected for two related research projects. The first study consisted of nine focus groups with Aboriginal individuals who volunteered for Aboriginal and non-Aboriginal sport organizations. The second study involved five focus groups with Aboriginal individuals who volunteered at one of two multi-sport events. The data were manually coded on the dimensions of intended beneficiaries, structure, remuneration, and free choice (Cnaan, Handy, & Wadsworth, 1996). There was little discussion of the issue of free choice, however most participants spoke of choosing the organizations, venues, and sports they wanted to help. The primary beneficiaries of their volunteer efforts were Aboriginal communities and Aboriginal youth. While they helped out formal organizations and events, their preference in those organizations was for relatively unstructured positions, for not being managed, and for a fun and relaxed environment. Volunteering was generally understood as unpaid work; yet, there was discussion of the growing trend of paying Aboriginal individuals to volunteer. These findings illustrate a broader and alternative understanding of volunteering in sport and have implications for the management of sport volunteers. 相似文献
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Martin E. Orland∗∗ 《教育政策杂志》2013,28(5):167-179
This chapter tracks the early effects of the 1988 amendments to the federal Chapter One programme on the policies and practices of four large urban districts (Atlanta, Chicago, Dade County and Dallas). Specifically, the article analyses reform efforts in the areas of programme co‐ordination, parental involvement, school‐wide projects and school performance accountability. Drawing on an historical analysis of the evolution of relations between the federal government and local school districts since the programme's inception in the 1960s, the authors argue that the apparently only modest impact of the 1988 reforms on the practice of Chapter One programmes to date is a result of a basic conflict between the intent of the reforms (to enhance educational effectiveness) and the political context as it occurs at the local level (an orientation toward bureaucratic and regulatory compliance). 相似文献
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