排序方式： 共有98条查询结果，搜索用时 31 毫秒
61.
André Koscianski Rafael João Ribeiro Sani Carvalho Rutz da Silva 《Research in Science & Technological Education》2013,31(3):255-269
Background : Advance organizers are instructional materials that help students use previous knowledge to make links with new information. Short animation movies are a possible format and are well suited for physics, as they can portray dynamic phenomena and represent abstract concepts. Purpose : The study aimed to determine guidelines for the construction of an instructional short animation movie, with the role of an advance organizer. A film was created in order to evaluate the effectiveness of the approach, making part of a physics lesson and concerning the subject ‘moment of a force’. Sample : The study took place in a Brazilian school in the city of Arapoti, in the south region of the country. Thirty-eight students participated, having an average age of 16 and following the third year of high school. Design and methods : Criteria drawn from a literature review directed the construction of the movie and the lesson. Data were collected using pre- and post-tests; registers of oral comments were also done during the class. The post-test included open-ended questions, allowing students to write remarks concerning the lesson and the animation. Conclusions : The article describes steps and guidelines to orient the process of designing an animation movie with the role of advance organizer. Data indicated that the movie facilitated the construction of links between pre-existent knowledge and the new information presented in the lesson. The proposed methodology can be considered a valid framework to derive similar approaches. 相似文献
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In Portugal, as elsewhere, the rhetoric of managerialism in higher education is becoming firmly entrenched in the governmental policymakers?? discourse and has been widely disseminated across the institutional landscape. Managerialism is an important ideological support of New Public Management policies and can be classified as a narrative of strategic change. In this paper, we analyse how far the managerialism narrative has been injected into the discursive repertory of Portuguese academics in their role as the co-ordinators of the higher education institutions?? teaching and academic middle levels. Based on an analysis of interview responses, it seems that most academics support traditional academic values such as autonomy and collegiality, and reject university or polytechnic governance based on corporate philosophy. 相似文献
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Cristiano?Carvalho Edleno?Silva?de?Moura Adriano?VelosoEmail author Nivio?Ziviani 《Information Retrieval》2018,21(4):253-272
Duplicate content on the Web occurs within the same website or across multiple websites. The latter is mainly associated with the existence of website replicas—sites that are perceptibly similar. Replication may be accidental, intentional or malicious, but no matter the reason, search engines suffer greatly either from unnecessarily storing and moving duplicate data, or from providing search results that do not offer real value to the users. In this paper, we model the detection of website replicas as a pairwise classification problem with distant supervision. That is, (heuristically) finding obvious replica and non-replica cases is trivial, but learning effective classifiers requires a representative set of non-obvious labeled examples, which are hard to obtain. We employ efficient Expectation-Maximization (EM) algorithms in order to find non-obvious examples from obvious ones, enlarging the training-set and improving the classifiers iteratively. Our classifiers employ association rules, being thus incrementally updated as the EM process iterates, making our algorithms time-efficient. Experiments show that: (1) replicas are fully eliminated at a false-positive rate lower than 0.005, incurring in + 19% reduction in the number of duplicate URLs, (2) reduction increases to + 21% by using our site-level algorithms in conjunction with existing URL-level algorithms, and (3) our classifiers are more than two orders of magnitude faster than semi-supervised alternative solutions. 相似文献
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Régine Kolinsky Isabel Leite Cristina Carvalho Ana Franco José Morais 《Reading and writing》2018,31(3):649-677
The purpose of this case series was to explore whether adults who did not have the opportunity to acquire reading skills during childhood are able to do so rapidly if trained with an adequate literacy program. After 14 weeks of training with a new, optimized, literacy course based on cognitive research, six out of eight participants became able to read words they had never encountered, hence demonstrating that they were definitely engaged in decoding processes that allow autonomous reading. Moreover, they showed enhanced phonemic sensitivity and phonological memory. The latter finding implies that functional changes can take place rapidly outside the reading domain even when reading is acquired in adulthood. Thus, there is no major plasticity impediment preventing rapid eradication of illiteracy in adults. 相似文献
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Caio Moura Daoud Edleno Silva de Moura David Fernandes Altigran Soares da Silva Cristian Rossi Andre Carvalho 《Information Retrieval》2017,20(3):292-316
In this paper, we present Waves, a novel document-at-a-time algorithm for fast computing of top-k query results in search systems. The Waves algorithm uses multi-tier indexes for processing queries. It performs successive tentative evaluations of results which we call waves. Each wave traverses the index, starting from a specific tier level i. Each wave i may insert only those documents that occur in that tier level into the answer. After processing a wave, the algorithm checks whether the answer achieved might be changed by successive waves or not. A new wave is started only if it has a chance of changing the top-k scores. We show through experiments that such lazy query processing strategy results in smaller query processing times when compared to previous approaches proposed in the literature. We present experiments to compare Waves’ performance to the state-of-the-art document-at-a-time query processing methods that preserve top-k results and show scenarios where the method can be a good alternative algorithm for computing top-k results. 相似文献
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Filipe D. Pereira Elaine H. T. Oliveira David B. F. Oliveira Alexandra I. Cristea Leandro S. G. Carvalho Samuel C. Fonseca Armando Toda Seiji Isotani 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(4):955-972
Tools for automatic grading programming assignments, also known as Online Judges, have been widely used to support computer science (CS) courses. Nevertheless, few studies have used these tools to acquire and analyse interaction data to better understand the students’ performance and behaviours, often due to data availability or inadequate granularity. To address this problem, we propose an Online Judge called CodeBench, which allows for fine-grained data collection of student interactions, at the level of, eg, keystrokes, number of submissions, and grades. We deployed CodeBench for 3 years (2016–18) and collected data from 2058 students from 16 introductory computer science (CS1) courses, on which we have carried out fine-grained learning analytics, towards early detection of effective/ineffective behaviours regarding learning CS concepts. Results extract clear behavioural classes of CS1 students, significantly differentiated both semantically and statistically, enabling us to better explain how student behaviours during programming have influenced learning outcomes. Finally, we also identify behaviours that can guide novice students to improve their learning performance, which can be used for interventions. We believe this work is a step forward towards enhancing Online Judges and helping teachers and students improve their CS1 teaching/learning practices. 相似文献
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Luiz Marcelo de Carvalho Jorge Megid Neto Clarice Sumi Kawasaki Dalva Maria Bianchini Bonotto Ivan Amorosino do Amaral José Artur Barroso Fernandes 《Environmental Education Research》2018,24(10):1447-1463
AbstractThis article discusses an analysis of abstracts of Brazilian theses and dissertations on environmental education from a database organised and maintained by a group of researchers in the EArt Project (www.earte.net). In presenting extracts of key trends in this dataset, our aim is to provide a snapshot of the many possible approaches to, and histories of, Brazilian environmental education research. The data also allow us to raise some questions that explore possible ‘blank spots’, ‘blind spots’ and ‘bald spots’ in Brazilian research on environmental education. Given the temporal development of the research field since the 1980s, we illustrate these ‘spots’ by exploring data related to epistemological and methodological diversity, from the viewpoint of knowledge areas as well as the graduate programmes that have been developing research on environmental education. Finally, we draw a picture of the methodological trends that have been privileged by Brazilian researchers, and pose questions as to what is needed in shaping an agenda for research on environmental education in Brazil into the future. 相似文献
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A progressive attempt to replace traditional public administration values and concepts by others that are closer to private management can be observed in the replacement of the service user concept by that of consumer or client. This redefinition's more implicit or explicit intent is to increase consumers'/clients' status, their capacity to choose and make rational choices in the market, and, ultimately, to ensure that organisations fulfil their needs. Influenced by this tendency, higher education institutions (HEIs) also started to see students as clients or consumers and to influence their choices by trying to define HE demand. This is evident in the shift in their external communication strategies: ‘institutional information’, based on HEIs' prestige, is being progressively replaced by ‘marketed information’, based on economic consumer logic. In trying to understand how students are perceived by Portuguese HEIs, we undertook qualitative research based on the content analysis of undergraduate degrees' announcements in newspapers. Major findings evidence that their content: (1) can be classified in a continuum bounded by two poles: the use of ‘institutional information’ and the use of ‘marketed information’; (2) show the presence of a social representation of students as clients or consumers; (3) seems related to HEIs' nature (public vs. private), positioning in the HE system (universities and polytechnics) and ‘symbolic capital’ (traditional vs. new institutions). 相似文献
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Tertiary Education and Management - In the last years, the increasing pressure over higher education institutions to promote alternative non-state funding sources has lead to an increasing... 相似文献