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Word sense disambiguation (WSD) is meant to assign the most appropriate sense to a polysemous word according to its context. We present a method for automatic WSD using only two resources: a raw text corpus and a machine-readable dictionary (MRD). The system learns the similarity matrix between word pairs from the unlabeled corpus, and it uses the vector representations of sense definitions from MRD, which are derived based on the similarity matrix. In order to disambiguate all occurrences of polysemous words in a sentence, the system separately constructs the acyclic weighted digraph (AWD) for every occurrence of polysemous words in a sentence. The AWD is structured based on consideration of the senses of context words which occur with a target word in a sentence. After building the AWD per each polysemous word, we can search the optimal path of the AWD using the Viterbi algorithm. We assign the most appropriate sense to the target word in sentences with the sense on the optimal path in the AWD. By experiments, our system shows 76.4% accuracy for the semantically ambiguous Korean words. 相似文献
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Based on survey responses from 187 parents of students who attended the Saturday Enrichment Program (SEP) at the Center for Talent Development (CTD) of Northwestern University, this study showed that overall, parents perceived favorable effects of the program on their children's talent development, especially academic talent development. As a result of participation in the CTD program, parents perceived that their children gained scholastic skills or knowledge, were more motivated to learn and interested in the subject areas they studied, and gained academic competence. After the program parents had higher academic expectations for their children. Parents felt positively about instructional aspects of the program such as focusing on a single subject in depth and breadth, experiencing interdisciplinary perspectives across subject areas, and having experiential learning opportunities. They also perceived that the SEP classes provided their children with both challenge and enjoyment. Despite the perceived benefits of SEP, results also showed that the majority of parents were still reluctant to pursue additional further educational actions inside or outside of school for their children after completing the program. However, of those who contacted their children's local schools, almost half said that their children received more challenging work (e.g., accepted and/or placed into advanced enrichment programs or other gifted programs/groupings in school, recommended for gifted programs, given additional materials or work, or skipped grades) as a result. 相似文献
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Tina Maschi Thalia MacMillan Manoj Pardasani Ji Seon Lee Claudia Moreno 《Educational gerontology》2013,39(4):228-242
The purpose of this study was to evaluate an experiential learning project with BSW students to see if their perceptions of older adults have changed. The project consisted of an oral history project and presentation that matched BSW students with older adults from diverse ethnic backgrounds to gather their immigration narratives. The study used a single group pretest posttest design with 17 BSW students enrolled in an integrative field seminar class. Using a series of inferential analyses, BSW students’ attitudes towards older adults, future career plans, confidence with working with older adults from diverse backgrounds, and geriatric competencies were examined. Overall, a significant increase in BSW students who had varying levels of participation in project perceptions of geriatric social work competencies between pretest and posttest were found. Students who both conducted and presented the oral histories of older adults also were significantly more likely to report future plans to work with older adults compared to students who did not. Exposing BSW students to aging and diversity content has important implications towards fostering student interest in pursuing social work practice with older adults and preparing them for culturally competent social work. 相似文献
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Dae Joong Kang Seon Joo Choi SeungHyeop Lee 《International Journal of Lifelong Education》2013,32(3):280-300
This study aimed to understand how people learn and teach informally in an anonymous online bulletin board, the primary purpose of which is not learning and teaching. We conducted a qualitative analysis of comments and replies tagged to the most popular postings of an anonymous online bulletin board, during the global economic crisis in 2008–2009. The bulletin board, Agora Economy Room, is housed in the Korean portal site, Daum. We found four interrelated collective activities—recognizing teaching presence, collaborating, labeling, and guarding—among the participants that made active informal learning and teaching possible. These activities had an effect on the characteristics of the emerging informal educative space in different ways. A conceptual map of the findings of this study is discussed as a conclusion. 相似文献
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Word sense disambiguation (WSD) is meant to assign the most appropriate sense to a polysemous word according to its context. We present a method for automatic WSD using only two resources: a raw text corpus and a machine-readable dictionary (MRD). The system learns the similarity matrix between word pairs from the unlabeled corpus, and it uses the vector representations of sense definitions from MRD, which are derived based on the similarity matrix. In order to disambiguate all occurrences of polysemous words in a sentence, the system separately constructs the acyclic weighted digraph (AWD) for every occurrence of polysemous words in a sentence. The AWD is structured based on consideration of the senses of context words which occur with a target word in a sentence. After building the AWD per each polysemous word, we can search the optimal path of the AWD using the Viterbi algorithm. We assign the most appropriate sense to the target word in sentences with the sense on the optimal path in the AWD. By experiments, our system shows 76.4% accuracy for the semantically ambiguous Korean words. 相似文献
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Cognitive diagnosis models (CDMs) typically assume skill attributes with discrete (often binary) levels of skill mastery, making the existence of skill continuity an anticipated form of model misspecification. In this article, misspecification due to skill continuity is argued to be of particular concern for several CDM applications due to the lack of invariance it yields in CDM skill attribute metrics, or what in this article are viewed as the “thresholds” applied to continuous attributes in distinguishing masters from nonmasters. Using the deterministic input noisy and (DINA) model as an illustration, the effects observed in real data are found to be systematic, with higher thresholds for mastery tending to emerge in higher ability populations. The results are shown to have significant implications for applications of CDMs that rely heavily upon the parameter invariance properties of the models, including, for example, applications toward the measurement of growth and differential item functioning analyses. 相似文献
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This study examined differences between students who qualified for talent search testing via scores on standardized tests and via parent nomination in their performances on the SAT or ACT and some demographic characteristics. Overall, the standardized testing group earned higher scores on the off‐level tests than the parent nominated group. Asian students used parent nomination more than standardized tests for talent search testing, and Hispanic/Latino students in the parent nominated group but not in the standardized testing group were among the top performers on the off‐level tests. Parent nomination as a feasible alternative to standardized achievement tests is suggested for talented students who are not native English speakers or would not be identified as gifted using traditional qualification methods. 相似文献
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Two hundred fourteen school officials who had students participate in an academic talent search through the Center for Talent Development of Northwestern University responded to a survey regarding how they use off‐level test scores for students’ talent development in school. Data showed that generally talent search is perceived by schools as a means of providing access to outside‐of‐school academic opportunities such as summer and distance learning courses. Few schools use talent search scores to design school‐based educational programs or to determine eligibility for in‐school gifted programs. Other findings included that schools learned about talent search mainly through mailings from the talent search center, gifted coordinators primarily administered talent search in their schools and participation was encouraged via letters to families, students were selected for talent search participation based on achievement test scores at the 95th percentile or above and follow‐up on talent search scores typically consisted of passing out certificates at a special ceremony. Schools that were more active versus less active in talent search were not different in terms of how they conducted or used talent search off‐level test scores. More efforts are needed from local schools to recognize the important role that talent search scores can have in their local programming to enhance the impact of talent search on gifted students. 相似文献
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Ji Seon Lee 《Educational gerontology》2013,39(9):805-815
Aging related social work research structures are vital in demonstrating the effectiveness of social work services with the elderly population, especially with the current focus on cost-effectiveness of services. However, not much is known about strategies employed by schools of social work to engage in social work research in the field of aging. This study surveyed all accredited MSW programs in the United States and had a response rate of 62%. The survey explored curriculum issues and interest levels in aging at both Master's and Doctoral levels, formal aging research structures within schools of social work and identified strengths and limits of these formal structures. The study also identified strategies for developing social work research in the field of aging in graduate schools of social work. 相似文献
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