Binary Pathfinder: An improvement to the Pathfinder algorithm     

Vicente P. Guerrero-Bote  Felipe Zapico-Alonso  María Eugenia Espinosa-Calvo  Rocío Gmez Crisstomo  Flix de Moya-Anegn 《Information processing & management》2006,42(6):1484

The Pathfinder algorithm is widely used to prune social networks. The pruning maintains the geodesic distances between nodes. It has shown itself to be very useful in the analysis of, amongst others, citations in BIS (bibliometrics, informetrics, and scientometrics). It has even been proposed for the online display of the search results in an information retrieval system. However, its great time and space complexity limits its use in real-time applications and in networks of any considerable size.The present work describes an improved algorithm with considerably reduced time and space complexity. Its lower execution costs thus increase its applicability both in real time and to large networks.  相似文献   

Do local contributions affect the efficiency of public primary schools?   总被引：3，自引：0，他引：3  

Emmanuel Jimenez  Vicente Paqueo 《Economics of Education Review》1996,15(4):377-386

Are public schools that rely on local resources for a greater share of their financing more cost-effective? Could financial decentralization lead to more efficient schools? This paper attempts to answer these questions using cost, financial sources and student achievement data from Philippine primary schools, which are financed primarily from central sources but which also raise funds from other sources, to differing degrees. It concludes that schools which rely more heavily on local sources, such as contributions from the local school board, municipal government, parent-teacher associations (PTA) and other sources are more efficient—i.e. have lower cost, holding constant for enrollment and quality. A 1% increase in the share of financing coming from local sources will lead to a decline in total costs of 0.135%, or about the cost of providing for a place for one more student.  相似文献   

Studying mathematics problem-solving classrooms. A comparison between the discourse of in-service teachers and student teachers     

Javier Rosales  Josetxu Orrantia  Santiago Vicente  Jose M. Chamoso 《European Journal of Psychology of Education - EJPE》2008,23(3):275-294

In the article we compare the approaches of 3 in-service teachers and 3 student teachers when they tried to solve a verbal arithmetic problem in the classroom. Each interaction was studied using a System of Analysis that takes into account the cognitive processes involved in the solution of a mathematic problem and describes the interaction at different levels showing what is done and to what degree teachers and/or pupils are responsible for what is done. The results of the study suggest that both groups of teachers are different in how they direct the student’s attention toward the essential aspects implied in the resolution of word problem. On the one hand, the in-service teachers guaranteed students’ understanding of the problem before dealing with the solution, while students teachers only did so when pupils committed errors. On the other hand, the in-service teachers allowed a high level of student participation, while student teachers took a more prominent role so children’s participation was lower.  相似文献   

Guidance and education,an analysis of young peoples’ discontinuous school pathways: the guidance-oriented approach of educational institutions     

Aisenson  Gabriela  Legaspi  Leandro Pablo María  Valenzuela  Viviana  Czerniuk  Renee  Miguelez  Violeta Vicente  Moulia  Lourdes  Larriba  Gerardo  Solano  Lila  Alonso  Diego Eduardo 《International Journal for Educational and Vocational Guidance》2022,22(3):739-758

International Journal for Educational and Vocational Guidance - This article presents results of an investigation that explored the school pathways of young Argentine unskilled workers without a...  相似文献   

Detection of explanation obstacles in scientific texts: the effect of an understanding task vs. an experiment task     

Júlia Morgado  José Otero  Vicente Sanjosé  Helena Caldeira 《Educational studies》2014,40(2):164-173

The aim of this study is to analyse the effect of tasks on the detection of explanation obstacles when secondary school students read scientific texts. Students were instructed to read short passages under different task conditions, and to ask questions if necessary. Obstacle detection was operationalised in terms of the type of questions asked by the students. The experiment examined the influence of goals associated with the task of reading to understand a text vs. reading to perform a procedure described by the text (a science experiment). Significantly, more explanation obstacles were found in the understanding condition than in the experiment condition. Scientific text also had an effect on the explanation obstacles detected.  相似文献   

Executive functions and pragmatics in children with high-functioning autism     

Filipe  Marisa G.  Veloso  Andreia  Frota  Sónia  Vicente  Selene G. 《Reading and writing》2020,33(4):859-875

Children with deficits in executive functions (EFs) and impairments in pragmatic language have a range of cognitive and language difficulties that affect their literacy and educational achievements. As deficits in EFs and pragmatic impairments are characteristics of autism spectrum disorders, this study examined the associations between EFs and pragmatic skills in children with high-functioning autism (HFA). Fifteen children with HFA (5–9 years; M?=?7.44, SD 1.21), matched to 15 typically developing peers on age, gender, and non-verbal intelligence participated in the study. Children completed a pragmatic language assessment protocol, and a rating scale of EFs was administered to parents. Our results point to two main findings: children with HFA presented pragmatic difficulties and EFs impairments when compared with typically developing peers; and, as shown by a significant indirect effect of group on pragmatics via EFs, the poor pragmatics skills of HFA children were associated with their EFs difficulties. These findings may be of clinical relevance for children with pragmatic impairments, such as autism spectrum disorders. Future studies are crucial to further investigate the relationship between impaired pragmatics and EFs.

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Student-initiated Facebook sites: nurturing personal learning environments or a place for the disenfranchised?     

Jennifer Charteris  Mitchell Parkes  Sue Gregory  Peter Fletcher  Vicente Reyes 《Technology, Pedagogy and Education》2013,22(4):459-472

ABSTRACT

Facebook is social media that is ubiquitously used in higher education contexts by both staff and students. It provides a platform for student networking and expression. The authors illuminate how pre-service teachers in an Australian university, undertaking undergraduate units, use Facebook as a student-initiated social media community. Although an increasing number of research studies have investigated student use of social media in higher education, this is an under-theorised area. In particular, little has been written about the student-initiated use of Facebook as a commentary on the activities running simultaneously to formal online learning programmes in universities. Data drawn from 15 semi-structured interviews support an investigation into student Facebook use. Findings highlight that student-driven Facebook sites have a range of purposes and offer ever-present access to a relational community online, although this can sometimes be problematic. When emotional support is not forthcoming from academics or there is disenfranchisement in formal learning spaces, membership in student-initiated learning communities can afford immediacy, informality, influence and shared emotional connections.  相似文献   

New Method for Historic Rammed-earth Wall Characterization: The Almohade Ramparts of Malaga and Seville     

Juan Jesús Martín-del-Rio  Vicente Flores-Alés  Francisco Javier Alejandre-Sánchez  Fco. Javier Blasco-López 《文物保护研究》2013,58(6):363-372

ABSTRACT

The goal of this research is to propose a new method of characterizing rammed-earth walls. Based on their historic building materials properties, five broad test groups were established for the characterization: chemical and mineralogical composition, physical properties, mechanical properties, particle size distribution, and dating. These determinations can, in turn, be grouped into two different types: instrumental techniques such as XRF, XRD, and SEM-EDX, as well as adaptations of standard methods (mainly UNE-EN standards) for application to these materials. As case studies where the proposed method is applied, we present our research on the rammed-earth walls in the ramparts of Seville and Malaga (Spain), clearly showing the method’s capacity for comparing and differentiating different rammed-earth walls.  相似文献   

Design and development challenges for an E2E DRM content business integration platform     

Antonio  Jos  Vicente 《International Journal of Information Management》2009,29(5):389-396

Current studies on Digital Rights Management (DRM) have focused on controlling access to and copies of contents, centered exclusively on the end of the value chain (end users). This focus has been oriented towards security and encryption as a means of solving the issue of illegal copying by purchasers. In this paper, we propose End-to-End Digital Rights Management (E2E DRM) that involves the protection of the content throughout the entire value chain. This concept is given form in the new technologies for representing intellectual property (IP) which, in a secure and unequivocal manner, identify the content at each point in the value chain: from the author to the end user, the content is identifiable in any of the transactions and statuses through which it passes. The key concept which E2E DRM must provide is not only the governability of access and copying, but also that of all the processes associated with the content business. We establish an E2E DRM model and architecture, and propose the R&D management of its design and implementation that makes it possible to protect content from content creator to purchaser. Finally, the paper also analyzes their impact from a global perspective.  相似文献   

Not so altruistic? Some keys elements about the knowledge,perception and participation of university students in NGOs / ¿No tan altruistas? Algunas claves sobre el conocimiento,la percepción y la participación del estudiantado universitario en ONG     

Vicente Díaz-Gandasegui  Begoña Elizalde-San-Miguel  Constanza Tobío-Soler 《Cultura y Educación》2018,30(2):276-307

This article analyses the knowledge, perception and participation of university students in NGOs. The social group analysed has a very positive perception towards volunteering as well as a life situation and preparation that, in theory, facilitates their participation in such activities. However, their effective participation is much lower than the levels shown by potential volunteers who would like to participate. We have identified two elements that stand between the possibility and reality: the lack of information and the time available. In this sense, universities appear as institutions capable of connecting the needs and demands of NGOs and students.  相似文献