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排序方式： 共有273条查询结果，搜索用时 15 毫秒
81.
Hierarchical Text Categorization Using Neural Networks 总被引：8，自引：1，他引：7
This paper presents the design and evaluation of a text categorization method based on the Hierarchical Mixture of Experts model. This model uses a divide and conquer principle to define smaller categorization problems based on a predefined hierarchical structure. The final classifier is a hierarchical array of neural networks. The method is evaluated using the UMLS Metathesaurus as the underlying hierarchical structure, and the OHSUMED test set of MEDLINE records. Comparisons with an optimized version of the traditional Rocchio's algorithm adapted for text categorization, as well as flat neural network classifiers are provided. The results show that the use of the hierarchical structure improves text categorization performance with respect to an equivalent flat model. The optimized Rocchio algorithm achieves a performance comparable with that of the hierarchical neural networks. 相似文献
82.
Miguel Antonio Lim 《International Studies in Sociology of Education》2020,29(1-2):107-125
ABSTRACT
The UK Research Excellence Framework (REF) introduced impact as an indicator in the evaluation of higher education research quality in 2014. Impact case studies (ICS) are the basis of this evaluation. ICS use narrative explanations of how research causes ‘benefits to society’. This article analyses the evolving roles of the ICS and the relationships of ICS with various stakeholders. It draws on insights from legitimacy theory, Porter’s analysis of the social meaning of objectivity, and the insight from economist Alan Goodhart on the dysfunctional transformation of indicators into targets. It highlights the challenges to ICS evaluators and shows how a spiral of mistrust can both undermine but also cause demand for numbers. It explores whether impact narratives represent an escape from dominant research evaluation metrics and concludes that they do not. 相似文献
83.
For many students, school is a place that makes no sense; a place where students’ interests are not reflected in the curriculum. Using mixed methods research, we developed an instrument that identifies student interests. This instrument was applied in a pilot study that considered 10th-grade students from three schools in Santiago, Chile. We compared student interest and national curriculum for different factors and established how well aligned these are. The results reveal that private school students prefer subjects that require greater cognitive development, related to Young’s powerful knowledge. Students from voucher schools, on the other hand, prefer to develop their knowledge of the arts and physical education, both of which are subjects they tend to enjoy. These findings are coherent with Bernstein’s theories. This pattern is also repeated when comparing high-performing students with their low-performing counterparts, regardless of school type. The findings of this study not only help identify which subjects the students want to study, but also to understand the reasons behind their preferences. Understanding these reasons is key for developing a more contextualised curriculum that makes more sense to the students. 相似文献
84.
Alternative frameworks,conceptual conflict and accommodation: Toward a principled teaching strategy 总被引：3，自引：0，他引：3
Students' alternative frameworks (frequently regarded as misconceptions) play a crucial role in science concept learning. Accumulated research findings indicate that alternative frameworks are resistant to extinction despite formal instruction.This paper presents an instructional strategy based on the thesis that science concept learning involves cognitive accommodation of an initially held alternative framework. The strategy consists of three phases: (1) exposing alternative frameworks, (2) creating conceptual conflict, (3) encouraging cognitive accommodation. The first phase is facilitated through an exposing event, while the second and third focus on a discrepant event.The authors have used previous research findings about student alternative frame-works for the structure of a gas to create exposing and discrepant events for an introduction to the particle model of gases. The paper presents a case study of two lessons in a sequence on the particle model, accompanied by an analysis of the phases of the instructional strategy employed for cognitive accommodation.Based on a paper presented at the AERA convention, Los Angeles, California, April, 1981.This paper was prepared while the first author was a visiting professor at Cornell University, Ithaca, New York. 相似文献
85.
Educational Studies in Mathematics - The Peruvian basic education and its curriculum have been impacted by the COVID-19 pandemic. As a result, certain trends and phenomena have emerged, which shape... 相似文献
86.
Maria Dolores Calero Maria Beln García-Martín Maria Isabel Jimnez Miguel Kazn Arsenio Araque 《Learning and individual differences》2007,17(4):328-343
Current approaches in intelligence research indicate the need for a more extensive determination of characteristics of children with possible giftedness, not only at an intellectual level, but also at the level of self-regulation and motivation. The present study compares self-regulation efficiency between high-IQ and average-ability children aged 6 to 11 years using a computerized task: The ‘Self-regulation and concentration test for children’ [SRTC, Kuhl, J. & Kraska, K. (1993). Self-regulation: Psychometric properties of a computer-aided instrument. The German Journal of Psychology, 17, 11–24]. Results show that high-IQ children have better self-regulatory abilities than a comparable group of average-ability children. In addition, self-regulation efficiency is related to working memory and action orientation (i.e., self-motivation). It is concluded that the assessment of self-regulation is important both for the research and practice related to children with high intellectual ability. 相似文献
87.
Miguel Casas Armengol 《Higher Education in Europe》2002,27(3):187-196
Globalization is a new worldwide force that is producing deep changes in many sectors of developed and developing societies. These changes may be very positive for those societies that have the elements necessary to channel the strong impacts of globalization. The situation may be less positive for the developing societies that have not evolved such conditions that would allow them to reorient or to limit the negative effects of globalization. The latter situation is typical of many Latin American societies. The best strategy for controlling the force of globalization in Latin America would be the use of distance education and virtual universities that are highly integrated with traditional universities and based upon new informational-telematic paradigms. 相似文献
88.
Miguel Portela Nelson Areal Carla Sá Fernando Alexandre João Cerejeira Ana Carvalho Artur Rodrigues 《Higher Education》2008,56(2):185-203
This paper characterizes and evaluates the student allocation in the Portuguese public higher education system. It describes
the supply and demand sides of the system by looking at the numerus clausus across areas of study and institutions, institutions’ degree of diversity, and performance and adjustment indicators based
on students’ revealed preferences. Performance indicators quantify the adequacy between demand and supply, across institutions
and fields of study, and gauge the performance of public higher education institutions in the competition for candidates.
Adjustment indicators allow us to predict the potential impact of changes in higher education regulations on student allocation
and its stability. According to these indicators, such changes could result in an expansion for some institutions and fields
of study, whereas other institutions might face a reduction.
相似文献
| Carla SáEmail: |
89.
Silva Elsa Costa e Lino-Neto Teresa Ribeiro Eug&#;nia Rocha Miguel Costa Manuel Jo&#;o 《Education and Information Technologies》2022,27(2):2311-2329
Education and Information Technologies - Team-based learning (TBL) is an active learning pedagogy developed for in-class sessions and based on the collaborative work of small groups of students.... 相似文献
90.
Alfonso Gutiérrez-Martín Alba Torrego-González Miguel Vicente-Mariño 《Cultura y Educación》2019,31(2):267-295
AbstractThe digital age of post-truth is the ideal breeding ground for fake news and misinformation. In the world of social networks and the Internet in general, commercial interests hold primacy over the importance of the veracity of the information provided. In this study, we have carried out a quantitative and qualitative content analysis of the messages published as comments on the most popular videos about Pokémon Go published in Spanish on YouTube. The main objective of the study is to analyse not only the content of the videos but, above all, users’ reactions to the misinformation provided. The results confirm the hypothesis that misinformation is promoted by the crisis of truth as a journalistic and social value, by economic interest and by the lack of suitable media education. We conclude by advocating the need to recover truth as a journalistic and social value in the digital context, and to accept that media literacy is an essential task to be assumed by all educational agents: schools, media and social groups. 相似文献