Group-Work In Primary Education: An Analysis Of Textbooks In Spain     

Mariangeles De La Caba Collado  Rafael Lopez Atxurra 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2005,13(1):439-458

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Mining unstructured content for recommender systems: an ensemble approach     

Marcelo G. Manzato  Marcos A. Domingues  Arthur C. Fortes  Camila V. Sundermann  Rafael M. D’Addio  Merley S. Conrado  Solange O. Rezende  Maria G. C. Pimentel 《Information Retrieval》2016,19(4):378-415

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“Should I let them talk?”: Private speech and task performance among preschool children with and without behavior problems     

Adam Winsler  Louis Manfra  Rafael M. Diaz 《Early childhood research quarterly》2007

Preschool and kindergarten teachers must make decisions everyday about how much to allow their children to talk out loud to themselves during various classroom activities. The present study examines the effects of children's private speech use on task performance for a group of behaviorally at-risk children and a group of control children during a speech–action coordination task. Twenty-nine behaviorally at-risk preschool children and 43 control children completed two versions of a speech–action coordination task (motor sequencing version and numeric tapping) two times, once with and once without speech instructions. Results indicated that the behaviorally at-risk children used more speech spontaneously compared to control children and performed just as well, and that both groups of children performed better when given instructions to use speech. Implications of these findings for early childhood educators’ decisions about children's private speech use in the classroom are discussed.  相似文献   

Greater basal skeletal muscle AMPKα phosphorylation in men than in women: Associations with anaerobic performance     

Amelia Guadalupe-Grau  Lorena Rodríguez-García  Rafael Torres-Peralta  David Morales-Álamo  Jesús Gustavo Ponce-González  Ismael Pérez-Suarez 《European Journal of Sport Science》2016,16(4):455-464

Objectives: This study was designed to investigate the association of gender, fibre type composition, and anaerobic performance with the basal skeletal muscle signalling cascades regulating muscle phenotype. Design: Muscle biopsies were obtained from 25 men and 10 women all young and healthy. Methods. Protein phosphorylation of Thr¹⁷²AMPKα, Ser²²¹ACCβ, Thr²⁸⁶CaMKII as well as total protein abundance of PGC-1α, SIRT1, and CnA were measured by Western blot and anaerobic performance by the Wingate test. Results: Percent type I myosin heavy chain (MHC I) was lower in men (37.1?±?10.4 vs. 58.5?±?12.5, P?P?P?221ACCβ and Thr²⁸⁶CaMKII fractional phosphorylation tended to be higher in men (P?=?.1). PGC1-α and SIRT1 total protein expression was similar in men and women, whereas CnA tended to be higher in men (P?=?.1). Basal AMPKα phosphorylation was linearly related to the percentage of MHC I in men (r?=?0.56; P?Conclusion: In summary, skeletal muscle basal AMPKα phosphorylation is higher in men compared to women, with no apparent effect on anaerobic performance.  相似文献   

Cold-water immersion alters muscle recruitment and balance of basketball players during vertical jump landing     

Christiane de Souza Guerino Macedo  Rafael Chagas Vicente  Mauricio Donini Cesário 《Journal of sports sciences》2016,34(4):348-357

The purpose of this study was to evaluate the effects of cold-water immersion on the electromyographic (EMG) response of the lower limb and balance during unipodal jump landing. The evaluation comprised 40 individuals (20 basketball players and 20 non-athletes). The EMG response in the lateral gastrocnemius, tibialis anterior, fibular longus, rectus femoris, hamstring and gluteus medius; amplitude and mean speed of the centre of pressure, flight time and ground reaction force (GRF) were analysed. All volunteers remained for 20 min with their ankle immersed in cold-water, and were re-evaluated immediately post and after 10, 20 and 30 min of reheating. The Shapiro–Wilk test, Friedman test and Dunn’s post test (P < 0.05) were used. The EMG response values decreased for the lateral gastrocnemius, tibialis anterior, fibular longus and rectus femoris of both athletes and non-athletes (P < 0.05). The comparison between the groups showed that the EMG response was lower for the athletes. Lower jump flight time and GRF, greater amplitude and mean speed of centre of pressure were predominant in the athletes. Cold-water immersion decreased the EMG activity of the lower limb, flight time and GRF and increased the amplitude and mean speed of centre of pressure.  相似文献   

Relationship Between Language and Concept Science Notebook Scores of English Language Learners and/or Economically Disadvantaged Students     

Margarita Huerta  Beverly J. Irby  Rafael Lara-Alecio  Fuhui Tong 《International Journal of Science and Mathematics Education》2016,14(2):269-285

Despite research interest in testing the effects of literacy-infused science interventions in different contexts, research exploring the relationship, if any, between academic language and conceptual understanding is scant. What little research exists does not include English language learners (ELLs) and/or economically disadvantaged (ED) student samples—students most at risk academically. This study quantitatively determined if there exists a relationship, and if so, how strong of a relationship, between ELL and ED students’ academic language and conceptual understanding based on science notebook scores used in a larger science and literacy-infused intervention with a sample of culturally diverse students. The study also considered strengths of relationships between language and concept science notebook scores within student language status groups (ELL, former ELL, and English speaking). Correlational analyses noted positive, large, and significant correlations between students’ language and concept scores overall, with the largest correlations for science notebook entries using more academic language. Large correlations also existed for ELL student entries at the end of the school year. Implications of the findings for future research and practice in science classrooms including literacy interventions, such as science notebooks, with populations of culturally diverse students are discussed.  相似文献   

Narratives of learning communities in environmental education     

Maria do Carmo Galiazzi  Diana Paula Salomão de Freitas  Cleiva Aguiar de Lima  Cláudia da Silva Cousin  Moacir Langoni de Souza  Rodrigo Launikas Cupelli 《Environmental Education Research》2018,24(10):1501-1513

Abstract

This article introduces the core concepts that emerged from five environmental education action research studies conducted by a group called Learning Communities in Environmental Education, Science and Mathematics (CEAMECIM) from the Universidade Federal do Rio Grande (FURG) in the south of Brazil. The studies focus on teacher education processes in learning communities involving teachers, researchers and environmental educators, and the critical writing and reading texts of classroom recordings to problematise participants’ teaching practices. CEAMECIM used action research cycles to examine narratives of educational action, narratives from teachers concerning their development as environmental educators, and narratives of their development of a sense of belonging, with a particular focus on critiquing social models that are based on hierarchies and individuality. From this analysis, we propose a new perspective on being and learning how to become a learning community, crystallised by the belief that ‘we are more when we are together’.  相似文献   

Technological learning and entrepreneurial behaviour: A taxonomy of the chemical industry in Venezuela     

Arnoldo Pirela  Rafael Rengifo  Alexis Mercado  Rigas Arvanitis 《Research Policy》1993,22(5-6)

This paper presents a taxonomy of entrepreneurial behaviour vis-à-vis technology, derived from empirical research on a specific sector, that of the chemicals industry in Venezuela. The research focuses heavily on the accumulation of minor innovations through which enterprises acquire their technical knowledge and know how, their technological learning. We have tried to give a precise empirical meaning to that notion in order to understand which are the most important variables that affect the technical learning process. Both the process of technological learning and the technical external linkages — in particular with foreign firms — of Venezuelan companies seem to be the fundamental factors in understanding the development of a new competitive industry which adopts a new products-oriented strategy. But not all firms do respond to such a scheme and it is thus necessary to develop a taxonomy of the industrial sector both for scholarly reasons as well as a policy guide.  相似文献   

Towards an ontological foundation of information ethics     

Rafael Capurro 《Ethics and Information Technology》2006,8(4):175-186

The paper presents, firstly, a brief review of the long history of information ethics beginning with the Greek concept of parrhesia or freedom of speech as analyzed by Michel Foucault. The recent concept of information ethics is related particularly to problems which arose in the last century with the development of computer technology and the internet. A broader concept of information ethics as dealing with the digital reconstruction of all possible phenomena leads to questions relating to digital ontology. Following Heidegger’s conception of the relation between ontology and metaphysics, the author argues that ontology has to do with Being itself and not just with the Being of beings which is the matter of metaphysics. The primary aim of an ontological foundation of information ethics is to question the metaphysical ambitions of digital ontology understood as today’s pervading understanding of Being. The author analyzes some challenges of digital technology, particularly with regard to the moral status of digital agents. The author argues that information ethics does not only deal with ethical questions relating to the infosphere. This view is contrasted with arguments presented by Luciano Floridi on the foundation of information ethics as well as on the moral status of digital agents. It is argued that a reductionist view of the human body as digital data overlooks the limits of digital ontology and gives up one basis for ethical orientation. Finally issues related to the digital divide as well as to intercultural aspects of information ethics are explored – and long and short-term agendas for appropriate responses are presented.  相似文献   

Federal funding and the rate and direction of inventive activity     

Rafael A. Corredoira  Brent D. Goldfarb  Yuan Shi 《Research Policy》2018,47(9):1777-1800

Leveraging a new measure of patent citation trees (Corredoira and Banerjee, 2015), we demonstrate that research funded by the federal government is associated with more active and diverse technological trajectories. Our findings tie government funding to breakthrough inventions. The differences are especially evident at the upper percentiles of the distribution of long term patent influence and stem primarily from research conducted outside the federal government and sponsored by the DOD, HHS and NSF. Government funded patents are inputs into a broader range of technologies. Additional analyses indicate that federal programs invest in some technological areas that private corporations eschew, and federally funded university patents are in different technological classes than non-federally funded university patents. In this sense, the government may play an irreplaceable role in the rate and direction of inventive activity.“Generally speaking, the scientific agencies of Government are not so concerned with immediate practical objectives as are the laboratories of industry nor, on the other hand, are they as free to explore any natural phenomena without regard to possible economic applications as are the educational and private research institutions.” - Vannevar Bush, Science the Endless Frontier”, 1945.  相似文献