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11.
Executive functions (EF) can be promoted by classroom interventions. Our study investigated whether (a) an intervention conducted by teachers improves EF in children; (b) there are effects on behaviour and academic achievement; and (c) there are stable benefits in a one-year follow-up. Fifty-eight first-graders, divided into experimental (EG = 28) and control (CG = 30) groups, were assessed in EF, reading and arithmetic tests. Parents and teachers answered EF and behaviour functional scales. The intervention was conducted by teachers in the classroom context. EG children showed greater gains in EF and outperformed controls on reading and arithmetic measures. The EG maintained better performance in the one-year follow-up and showed transfer effect for behaviour measures. The EF intervention may be a useful tool for promoting improved adjustment and academic achievement. 相似文献
12.
Giselle Martins dos Santos Ferreira Márcio Silveira Lemgruber 《Learning, Media and Technology》2019,44(3):315-326
ABSTRACTNearly two decades have passed since the Open Educational Resources (OER) movement was launched. Its success in Brazil can be illustrated with the establishment of a UNESCO Chair in Open Education in 2014, in one of the country’s most prestigious universities. Crucially, OER were included in the 2014–2024 National Education Plan, a key piece of national educational legislation, as a category of educational technologies framed as tools. Assuming metaphors such as this play a key role in the ways we think, speak and act, this article presents a critical perspective on OER in Brazil. Examining the implications of the main metaphors used to construe OER in local media and academic sources, the text argues that these metaphors reflect hegemonic discourses on educational technology, concealing the non-neutrality of technological artefacts, obscuring issues concerning curriculum and pedagogy, and overlooking actual local needs. The article discusses issues concerning local OER advocacy, positioned in respect to specificities of a context where education, albeit a constitutionally established right, may be poised to undergo radical changes in the near future. 相似文献
13.
Vinícius Medina Kern Luciana Martins Saraiva Roberto Carlos dos Santos Pacheco 《Education and Information Technologies》2003,8(1):37-46
This article discusses the application of the peer review process as a pedagogical instrument for the promotion of written expression, collaborative work, critical thinking, and professional responsibility among Informatics and Engineering majors. The approach is introduced with a motivation, followed by a discussion about common principles of current learning paradigms and the peer review process. This work is being conducted in Brazil, where we intend to promote a learning paradigm shift through the application of peer review in education. A framework for this application is outlined, together with an account of results from experiences and a discussion about the skills that this approach exercises, especially with regard to widely accepted curricula and codes of ethics and professional conduct. Further research and development efforts are conjectured. 相似文献
14.
Cristina Martins Coelho Maycon Moura Reboredo Felipe Martins Valle Carla Malaguti Larissa Almeida Campos Lucas Mendes Nascimento 《Journal of sports sciences》2018,36(10):1186-1193
Supervised exercise has shown benefits for subjects with asthma, but little is known about the effectiveness of unsupervised physical activity on this population. We investigated the effects of a 12-week unsupervised pedometer-based physical activity program on daily steps and on clinical and psychological parameters of adults with asthma. Clinically stable adults with moderate to severe asthma were encouraged to take daily 30-minute walks and were randomized to pedometer and control groups. The pedometer group received pedometers and individualized daily step targets. Changes in daily steps (average of steps taken during six consecutive days), six-minute walk test (6MWT), health-related quality of life, asthma control and anxiety and depression levels were assessed 12 weeks after intervention and 24–28 weeks after randomization. Thirty-seven participants were recruited and 30 completed the intervention. At 12 weeks, the groups differed significantly in daily steps (adjusted average difference, 2488 steps; 95% confidence interval [CI], 803 to 4172; p = 0.005) and in the 6MWT (adjusted average difference, 21.9 m; 95% CI, 6.6 to 37.3; p = 0.006). These differences were not significant 24–28 weeks after randomization. The program was effective in increasing daily steps of adults with moderate to severe asthma 12 weeks after intervention. 相似文献
15.
The objective of this work was to investigate the influence of hydrodynamics on the growth kinetics of surface-adhering Pseudomonas putida cells. The results showed in particular that under non substrate-limiting conditions, the early step of bacterial apparent growth rate is lower than those measured with suspended cells. Contrary to previously cited authors which explain this behavior to the different adhesive properties of the “daughter”-cells (which makes more probable the detachment of these daughter-cells), in our experimental conditions, that explanation does not hold and we show a clear dependence of growth kinetics with flow conditions, due to the formation of boundary layer concentration at low Reynolds number. These results revealed that using Monod law in the modeling of biofilm growth in fixed-biomass processes should be performed with care. 相似文献
16.
It is known that the conductance of nanochannels as a function of electrolyte concentration deviates from a linearly proportional relationship and approaches a value independent of the concentration as the electrolyte concentration is lowered. Most of the proposed models account for this behavior by considering a constant surface charge density and an ideal electrolyte solution. However, at low electrolyte concentrations, the ideal electrolyte approximation is no longer valid because the ions that result from the atmospheric carbon dioxide dissolution in water dominate the ionic concentration. In this paper, arrays of silica nanochannels were electrically characterized via conductance measurements. The conductance at low salt concentrations is modeled by a variable surface charge model that accounts for all ionic species in solution. This model was used to determine the variable surface charge of the bare silica nanochannels as well as of chemically modified nanochannels. The model correctly predicted the variation of the nanochannel conductance observed after silane (aminopropyldimethylethoxysilane) functionalization and single-strand DNA immobilization. Finally, pH modification of bulk KCl solutions was employed as an alternative method of changing the surface charge of silica nanochannels. Surface charge calculated from conductance measurements performed at different bulk pH values confirmed that the surface charge of the silica nanochannel walls is sensitive to the H+ concentration. 相似文献
17.
Thaís Cyrino de Mello Forato Roberto de Andrade Martins Maurício Pietrocola 《Science & Education》2012,21(5):657-682
This article presents the main results of a research examining the didactic transposition of history and philosophy of science
in high school level. The adaptation of history of science to this particular level, addressing some aspects of the nature
of science aiming at the students’ critical engagement, was analyzed by examining both the historiographic requirements of
history of science and the pedagogical recommendations of science teaching. The research included the elaboration of a pilot
course on the history of optics, with historical texts and educational activities, and its application in a high school. We
used three episodes of the history of optics, addressing some epistemological points, especially criticizing the naive empirical-inductive
view of science. It was possible to identify a series of obstacles in using history of science and conveying philosophical
views. Their analysis resulted in devising strategies to surmount or to circumvent them. We implemented those strategies in
the classroom and analyzed the data that was obtained. As a result, we substantiated several of our proposals and found that
some solutions require improvement. We suggest some generalizations, which can be understood as initial parameters for guiding
the use of history and philosophy of science in science teaching. We used a qualitative methodology of educational research
to plan, to collect and to analyze the data, examining the interaction between students, teacher and knowledge. 相似文献
18.
This study looks at the ideas which children have of the particulate model of matter, at the time they start formal science in school. Pupils aged about eleven in three European countries‐‐Greece, Portugal and the UK‐‐were studied using word association tests. In the UK and Portugal the children had received no teaching of the particulate model; in Greece the pupils had received one year of introductory science, containing some teaching of the particulate model. Key words associated with the particulate model were investigated as free associations. In Portugal and the UK there was little or no evidence of particulate ideas in the pupils’ responses. In the Greek data particulate ideas were more in evidence. There were other clear differences in the data from the three countries. Educational and research implications of the findings are discussed. 相似文献
19.
Cristineide Leandro-França Sheila Giardini Murta Douglas A. Hershey Leonardo Barbosa Martins 《Educational gerontology》2013,39(7):497-512
ABSTRACTThe objective of this integrative literature review was to evaluate the quality of retirement planning programs described in the extant literature. This was accomplished through a qualitative analysis of methodological and efficacy criteria as described by Flay et al. (2005), Kazdin (2010, 2011 and Murta (2005). Several databases were consulted in searching for retirement program articles including: Academic Search Premier, Medline, PsycInfo, and Web of Science, among others. Retirement planning intervention articles published in English, Portuguese, and Spanish were considered, with a focus on their evaluation methods and results. Eleven studies were identified that described the procedures for both program implementation and intervention evaluation. Results revealed methodological shortcomings in the papers reviewed, with concerns being related to a lack of experimental or quasiexperimental approaches, a failure to use previously validated measurement instruments and longitudinal assessments, and insufficiently robust data analysis procedures. That said, however, there was evidence from multiple investigations that the intervention programs examined led to increases in knowledge, positive changes in attitudes linked to retirement, and an increase in retirement-linked planning and preparation behaviors. Identification of strengths and weaknesses in the methods used and efficacy of these interventions could facilitate the construction of a research agenda aimed at promoting more favorable research designs. Use of more rigorous designs would stand to improve the internal validity of these retirement programs and, consequently, progress in this field. 相似文献
20.
Adilson Marques Élvio Rubio Gouveira Miguel Peralta João Martins Joed Venturini Duarte Henriques-Neto 《Journal of sports sciences》2020,38(14):1690-1697
ABSTRACT This study aimed to systematically review the association between cardiorespiratory fitness and telomere length (TL). Studies were identified from searches in Cochrane Central, PubMed, Scopus, Sportdiscus, and Web of Science databases through July 2019. Eligibility criteria included: cross-sectional, prospective, and experimental study design; outcomes included TL; results expressed the relationship between cardiorespiratory fitness and TL; studies published in English, Portuguese, or Spanish. A total of 20 articles met the inclusion criteria. Sixteen studies (80%) reported a significant relationship between cardiorespiratory fitness, or training load, and TL. Better cardiorespiratory fitness or a large cardiorespiratory training load are associated with an increase in TL. Although, TL was related to regular moderate-to-vigorous aerobic exercise and cardiorespiratory fitness in older healthy humans, it was not related to cardiorespiratory fitness among young subjects. There seems to be a positive and significant relationship between cardiorespiratory fitness and TL, mainly among middle age and older people, which emphasizes the importance of cardiorespiratory fitness for healthy ageing. Therefore, endurance exercise and better cardiorespiratory fitness may regulate the TL in middle age and older adults, slowing the cellular ageing process. 相似文献