The Dynamics of Perspective in Quantum Physics     

Pereira  Alexsandro  Solbes  Jordi 《Science & Education》2022,31(2):427-450

Science & Education - Debates on the philosophical interpretations of quantum physics have motivated a renewed interest in how secondary and lower undergraduate students interpret quantum...  相似文献   

The rating of perceived exertion predicts intermittent vertical jump demand and performance     

Pereira G  Correia R  Ugrinowitsch C  Nakamura F  Rodacki A  Fowler N  Kokubun E 《Journal of sports sciences》2011,29(9):927-932

The aims of this study were (a) to assess the ability of the rating of perceived exertion (RPE) to predict performance (i.e. number of vertical jumps performed to a fixed jump height) of an intermittent vertical jump exercise, and (b) to determine the ability of RPE to describe the physiological demand of such exercise. Eight healthy men performed intermittent vertical jumps with rest periods of 4, 5, and 6 s until fatigue. Heart rate and RPE were recorded every five jumps throughout the sessions. The number of vertical jumps performed was also recorded. Random coefficient growth curve analysis identified relationships between the number of vertical jumps and both RPE and heart rate for which there were similar slopes. In addition, there were no differences between individual slopes and the mean slope for either RPE or heart rate. Moreover, RPE and number of jumps were highly correlated throughout all sessions (r = 0.97-0.99; P < 0.001), as were RPE and heart rate (r = 0.93-0.97; P < 0.001). The findings suggest that RPE can both predict the performance of intermittent vertical jump exercise and describe the physiological demands of such exercise.  相似文献   

Power training in elite young soccer players: Effects of using loads above or below the optimum power zone     

Irineu Loturco  Lucas A. Pereira  Valter P. Reis  Chris Bishop  Vinicius Zanetti  Pedro E. Alcaraz 《Journal of sports sciences》2020,38(11-12):1416-1422

ABSTRACT

This study aimed to examine the effects of two jump squat (JS) training programs involving different loading ranges in under-20 soccer players during a preseason period. Twenty-three elite young soccer players performed sprint speed (at 5-, 10-, and 20-m), change-of-direction (COD) speed, JS peak-power (PP), and countermovement jump (CMJ) tests pre and post four weeks of training. Athletes were pair-matched in two groups according to their optimum power loads (OPL) as follows: lower than OPL (LOPL; athletes who trained at a load 20% lower than the OPL) and higher than OPL (HOPL; athletes who trained at a load 20% higher than the OPL). Magnitude-based inferences were used to compare pre- and post-training measures. Meaningful increases in the PP JS were observed for both groups. Likely and possible improvements were observed in the 5- and 10-m sprint velocity in the LOPL group. Meanwhile, possible and likely improvements were observed in the CMJ, 5- and 10-m sprint velocity, and COD speed in the HOPL group. Overall, both training schemes induced positive changes in athletic performance. Soccer coaches and sport scientists can implement the JS OPL-based training schemes presented here, either separately or combined, to improve the physical performance of youth soccer players.  相似文献   

Correlation analysis of performance measures for multi-label classification     

Rafael B. Pereira  Alexandre Plastino  Bianca Zadrozny  Luiz H.C. Merschmann 《Information processing & management》2018,54(3):359-369

In many important application domains, such as text categorization, scene classification, biomolecular analysis and medical diagnosis, examples are naturally associated with more than one class label, giving rise to multi-label classification problems. This fact has led, in recent years, to a substantial amount of research in multi-label classification. In order to evaluate and compare multi-label classifiers, researchers have adapted evaluation measures from the single-label paradigm, like Precision and Recall; and also have developed many different measures specifically for the multi-label paradigm, like Hamming Loss and Subset Accuracy. However, these evaluation measures have been used arbitrarily in multi-label classification experiments, without an objective analysis of correlation or bias. This can lead to misleading conclusions, as the experimental results may appear to favor a specific behavior depending on the subset of measures chosen. Also, as different papers in the area currently employ distinct subsets of measures, it is difficult to compare results across papers. In this work, we provide a thorough analysis of multi-label evaluation measures, and we give concrete suggestions for researchers to make an informed decision when choosing evaluation measures for multi-label classification.  相似文献   

Initial Validity and Reliability of the Portuguese Borg Rating of Perceived Exertion 6-20 Scale     

Luana L. Cabral  Fábio Y. Nakamura  Joice M. F. Stefanello  Luiz C. V. Pessoa  Bruno P. C. Smirmaul  Gleber Pereira 《Measurement in physical education and exercise science》2020,24(2):103-114

ABSTRACT

The aims of this study were to perform the cross-cultural adaptation of the Borg Rating of Perceived Exertion (RPE) 6–20 Scale to Brazilian Portuguese language and to start testing its validity and reliability. After performing the cross-cultural adaptation of the Scale, concurrent and discriminative validity, and reliability were determined on a treadmill in young (18–30 years) and older adult women (60–75 years). Considering young and older adult women, RPE presented high and moderate positive correlation with heart rate and high and low positive correlation with oxygen consumption, respectively. Older adult women presented RPE (11 ± 2) significantly higher than young ones (8 ± 1) exercising at the same absolute intensity. Intraclass coefficient correlation was excellent for RPE to young and older adult women. The Scale presented concurrent validity only to young adult women, whereas it presented discriminative validity between such groups of women. Moreover, the scale is reliable to young and older adult women.  相似文献   

Non‐at‐risk adolescents' attitudes towards reading in a Singapore secondary school     

Wendy Bokhorst‐Heng  Delfin Pereira 《Journal of Research in Reading》2008,31(3):285-301

In this paper, we examine the various nuanced dimensions of adolescents' dispositions towards reading in one secondary school in Singapore, where a high‐stakes examination culture often threatens to colonise the practices of leisure reading. Our focus is on the better and more avid readers as they were the ones that developed the more negative attitudes towards reading at the end of their first year in secondary school. Our analysis found that there were no significant differences between boys and girls in their declining attitudes, and that for both ‘intrinsic motivation’ saw the greatest decline. However, attitudes related to learning orientation remained stable, suggesting both the impact of constraints in an exam‐oriented educational structure as well as possibilities for developing reading pedagogy and adolescent reading programmes. We argue that the more educators are aware of the multidimensionality and complexity of the attitudes and values that students bring to their reading, the more effectively they will be able to design and implement programmes and pedagogy to foster positive attitudes and promote a lifelong love for reading.  相似文献   

Simulation framework for teaching in modeling and simulation areas     

Marisa Raquel De Giusti  Ariel Jorge Lira  Gonzalo Luján Villarreal 《European Journal of Engineering Education》2008,33(5-6):587-596

Simulation is the process of executing a model that describes a system with enough detail; this model has its entities, an internal state, some input and output variables and a list of processes bound to these variables. Teaching a simulation language such as general purpose simulation system (GPSS) is always a challenge, because of the way it executes the models and the abstraction level it can achieve, very different compared with most well-known programming languages. This article presents an open source simulation framework that implements a subset of entities of GPSS, which could help students to improve the understanding of this language. This tool also stores all entities of simulations in every single simulation time, which is very useful for debugging simulations, but also for getting a detailed history of all entities in the simulations, knowing exactly how they have behaved in every simulation time.  相似文献   

Evaluating effects of different forms of revision instruction in upper-primary students     

López  Paula  Torrance  Mark  Rijlaarsdam  Gert  Fidalgo  Raquel 《Reading and writing》2021,34(7):1741-1767

Reading and Writing - This study aimed to establish (a) whether teaching students revision skills provides benefit over and above teaching strategies for setting explicit goals for the...  相似文献   

(Re) thinking Emotions in Visual Education Activities: Students' Experiences          下载免费PDF全文

Silvia Casian  Amélia Lopes  Fátima Pereira 《The International Journal of Art & Design Education》2018,37(3):399-412

This article focuses on the emotions of 13 and 14 year‐old students related to visual art education activities. Our aim is to understand the interference of the students' emotions with the processes of the creation and reception of their own pictures, as well as their characteristics in an art education context. The article adopts a Vygotskian theoretical perspective about emotion and aesthetic education that refers to the biopsychological nature of emotion and its cultural determination. The need to transform emotions in art activities is stressed and the teenagers' pictures are interpreted as a means of communication. The data collection was based on questionnaires and interviews with seventh and eighth grade secondary school students. It is concluded that students' emotions are not only present in the creative process and in its result, but also that they could have a significant positive or negative impact on students' motivation and achievement behaviour in art education classes. In this context, the students' pictures, acting as stimuli, may evoke their emotions.  相似文献   

Moving beyond the predictable failure of Ed-Tech initiatives     

Juana M. Sancho-Gil  Pablo Rivera-Vargas  Raquel Miño-Puigcercós 《Learning, Media and Technology》2020,45(1):61-75

ABSTRACT

The development of Information and Communication Technology has created waves of excitement about its power to fix educational problems and improve learning results, prompting a succession of policy efforts to integrate digital technology into education. Educators, schools and corporations are increasingly driving these initiatives. This article makes the argument that a narrow vision of digital technology, which both ignores the complexity of education and wastes valuable public resources, is becoming an obstacle to significant improvement and transformation in education. Utilising our research and experience in the field of educational technology, this paper problematises the common elision of ‘technology’ and ‘digital technology’. From this basis, we then critically reflect on various common approaches to introducing digital technology in education under the guise of promoting equality and digital inclusion. These include national government-led programmes, more recent trends for local school-led initiatives, and the role of non-formal education initiatives led by corporations/foundations. Amidst the varying surface-level ‘failure’ and/or ‘success’ of these approaches, we point to limited underpinning ‘information and knowledge society’ logics in framing the application of digital technology to education. As such we conclude by considering the educational challenges for future Ed-Tech initiatives.  相似文献