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471.
Physical activity is important in obesity prevention, but the effectiveness of different physical activity modalities remains to be determined among children. The main purpose of this study was to compare the effects of a 6-month soccer programme and a traditional physical activity programme on changes in body composition, cardiometabolic risk factors, inflammatory and oxidative markers, cardiorespiratory fitness and perceived psychological status in obese boys. Eighty-eight boys (8–12 years; BMI > +2 standard deviations of WHO reference values) participated in one of three groups: soccer, traditional activity and control. Soccer and traditional activity programmes involved 3 sessions per week for 60–90 min at an average intensity of 70–80% of maximal heart rate. Control group participated in activities of normal daily living. All boys participated in school physical education, two sessions per week of 45–90-min. Measurements were taken at baseline and after 6 months, and included body size and composition, cardiometabolic risk factors, inflammatory and oxidative markers, cardiorespiratory fitness and perceived psychological status. Physical activity and dietary intake were assessed before and immediately following the intervention. The three groups had similar characteristics at baseline. After 6 months, both intervention groups had significantly lower relative fatness (% fat), waist circumference and total cholesterol, and higher cardiorespiratory fitness, self-esteem, perceived physical competence and attraction to physical activity compared with control group. In conclusion, physical activity interventions over 6 months positively influenced several indicators of health status among obese boys. The results also suggested that soccer has the potential as an effective tool for the prevention and reduction of childhood obesity and associated consequences.  相似文献   
472.
This paper takes a longue durée look at universities at the core of the world economy, where the modern idea of intellectuals as trustees of the reflexive structures of society has achieved its most enduring institutional form. To wrest thinking away from a conformism that makes us see universities as nothing more than organisations amongst organisations forever in process of adapting themselves to the exigencies of world ordering, we focus on three moments of rupture: (i) the ‘prehistory of higher education’, when the work of the medieval renaissance was ‘largely done’ and original universities where founded in the folds of the nascent European économie-monde, (ii) the crisis of the Bretton Woods world order, and (iii) the present juncture  相似文献   
473.
474.
The research described in this paper addresses how a language tutoring system tackles a practical problem in learning a language — negative transfer (mother tongue influence). The empirical studies we have undertaken indicate that negative transfer is the most obvious explanation for most of the errors committed by first-year students in their study of Chinese grammar at the University of Durham. The results of our empirical studies accord with the views of experts on both negative transfer and the Chinese language. A language tutoring prototype (the Chinese Tutor) has been designed on the basis of the results of the empirical studies. The Chinese Tutor contains five models: the expert model, the student model, the diagnoser, the tutor model and the interface module. The five models work effectively together in order to ensure a successful tutorial session. A number of potential users from the Department of East Asian Studies at the University of Durham have used the Chinese Tutor with positive results. In this paper, we will first address issues in relation to empirical studies: the significance of empirical studies and the results of the empirical studies. We will then move on to some of the important design issues, i.e., how the problem of negative transfer is tackled by the Chinese Tutor, which includes discussions on how the rules in the mixed grammar are used for detecting arbitrary transfer errors; how the types of error made by the student are inferred; and how an appropriate tutorial strategy is selected. Finally, a tutorial session run by one of the students who has used the Chinese Tutor is presented and what the Chinese Tutor can offer to the students will also be addressed.  相似文献   
475.
This commentary on Roth, Lee, and Hwang’s paper aims at analysing their theoretical approach in terms of its object of study, and the aspects that are brought to the fore, like the cultural activity of conversation, and those that are overshadowed, like the role of the material world and its perception on learning. This analysis, developed on the basis of a pragmatic approach that combines theoretical frameworks, leads to a debate about the relevant components of teaching–learning situations according to the theoretical approaches, and the extent to which, due to the complexity of the studied phenomena, some theoretical frameworks are complementary or concurrent.
Andrée TiberghienEmail:

Andrée Tiberghien   obtained her Ph.D. in condensed matter physics from the University of Paris 6 in 1972. She started her research in science education with studies on students’ conceptions in several domains (electricity, heat-temperature, light). Currently her research work is focused on classroom practices and the evolution of students’ knowledge during teaching sequences. She is in charge of a database project on video recordings of teaching and training situations (ViSA). She has contributed for more than 10 years to a research-development group of researchers and teachers who are producing new teaching resources. She is a member of the science expert group of PISA 2006 and 2009.  相似文献   
476.
The computer-aided engineering (CAE) system gives an engineer a set of powerful new tools for proper realization of his/her design tasks. Therefore, it is also necessary to accept this methodological development adequately within the engineering curriculum of technical universities in the successful education of the new generation of engineers. CAE methodology influences all areas of an engineer's work and should be accompanied by principal changes in the traditionally used methods of engineering education. But the student's use of computer tools within many engineering disciplines hides the danger of gaining practical skills by means of the computer instead of traditional educational goals concerning the proper understanding of the solution principles of technical problems. Sometimes the students are not able to recognize the significance of, for example, software development problems or engineer workstation organization problems, in view of the main goal of engineering design—to develop a new technical system. To avoid this danger it is necessary to present methods of technical management as an integral part of CAE education. Such orientation has an important role within an engineer's education in the twentieth century.  相似文献   
477.
An in-depth scientific survey revealed the deterioration mechanisms affecting the ‘Santa Maria della Stella’ church in Saluzzo, Italy, where various salt crystallization processes are strongly damaging the building materials and artworks. Rainwater seepage permeates the vault and interior, causing: (1) epsomite growth as interstitial columnar crystals (resulting in pictorial coating detachment) or superficial, powdery efflorescence; (2) formation of nesquehonite/hydromagnesite crusts on wall paintings; and (3) nitratine growth causing pigment staining and detachment. These processes involve selective Mg2+ mobilization from magnesian-lime mortars and bacterial-induced formation of nitrates from guano, with consequent precipitation of degrading salts. The study confirms how characterization of all deterioration agents is fundamental to planning a viable cultural heritage conservation and restoration programme.  相似文献   
478.
New Interactions     
From the first studies of wearables inside MIT’s Media Lab decades ago to the smartwatches and smartglasses sold these days as consumer devices, wearables provide clues to better understand new paths to record and distribute information. Google Glass was one of the first immersive products, allowing users to capture and stream information to the Web, creating screen-based micro-interactions displayed in front of the user’s eye or sent to their smartphone. The first-person perspective is not new, but network-enabled Glass creates a novel state of streamed information and images, potentially making the journalist an avatar of the audience. Possibilities also lay in the development of Glass-specific ambient or calm communications—providing users with seamless information updates. Our study explores how Glass, attached to the head of the journalist-broadcaster, creates alternative behaviours in those captured due to its almost-invisible camera. These and other aspects of Glass will be explored during this paper, recalling experiences made across multiple test beds in the United Kingdom, Porto Alegre, Brazil and the Sahara Desert. The lessons acquired from these experiences allow us to understand not only new ways to inform, but new relationships between journalists, newsrooms and the public.  相似文献   
479.
Political, cultural and social fallout following the introduction of the anti-homosexuality bill in Uganda in 2009 intensified fabrication of an anti-gay public pedagogy of negation and nemesis that fuelled the passage of the Anti-Homosexuality Act, 2014. The Government of Uganda, conventional Anglicanism and US evangelical Christianity were all implicated in developing this homophobic public pedagogy. This article provides an extensive account of what transpired to result in prohibition of lifelong learning focused on Ugandan sexual minorities. In the face of this prohibition, the article calls for lifelong learning as critical action constructed as strategic public counter-pedagogy aimed at recognizing and accommodating sexual minorities in the face of homophobia. This critically progressive counter-pedagogy would include a pragmatic turn to comprehensive health education as a starting point for inclusive, holistic learning. The article also considers the important role that media could play in this work. It explores contemporary realities of advancing and deploying lifelong learning as critical action in Uganda, examining the current dire state of education in the nation. It concludes by considering the status of Uganda’s tenacious quest to entrench gay apartheid amid what is now a growing trend toward global gay inclusion.  相似文献   
480.
This study focuses on the teachers’ predictions of the students’ performances – in particular the middle-low achievers – while solving tasks testing inquiry competencies. The tasks come from PISA science. More specifically we study science teachers’ predictions for several aspects: levels of difficulty of the tasks, the potential sources of difficulty and the potential difficulty in solving it for medium-low achievers. We also study what assessed competencies are identified by science teachers in the tasks. Our approach is a questionnaire-based study. A sample of French teachers in science and technology (125) responded to the questionnaire. The teachers show a rather good ability to predict inquiry task levels of difficulty for medium-low achievers and are able to identify relevant potential sources of difficulty or easiness in the items. However, they are not aware of some essential difficulties that medium-low students encounter while solving science inquiry tasks. Moreover, the teachers have difficulty identifying the competencies that are tested by an item.  相似文献   
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