Sensor-based physical activity,sedentary time,and reported cell phone screen time: A hierarchy of correlates in youth     

Pedro B. Júdice  Joo P. Magalhes  Gil B. Rosa  Duarte Henriques-Neto  Megan Hetherington-Rauth  Luís B. Sardinha 《运动与健康科学(英文)》2021,10(1):55

BackgroundEvidence on correlates relies on subjective metrics and fails to include correlates across all levels of the ecologic model. We determined which correlates best predict sensor-based physical activity (PA), sedentary time (ST), and self-reported cell phone screen time (CST) in a large sample of youth, while considering a multiplicity of correlates.MethodsUsing sensor-based accelerometry, we assessed the PA and ST of 2179 youths. A χ² automatic interaction detection algorithm was used to hierarchize the correlates associated with too much ST (> 50th percentile), insufficient moderate-to-vigorous PA (MVPA) (<60 min/day), and prolonged CST (≥2 h/day).ResultsAmong youth 10–14 years old, the correlates for being inactive consisted of being a girl, not having sport facilities in the neighborhood, and not perceiving the neighborhood as a safe place, whereas in the youth 15–18 years old, the correlate for being inactive was not performing sports (9.7% chance of being active). The correlates for predicting high ST in the younger group was not performing sports (55.8% chance for high ST), and in the older group, the correlates were not owning a pet, perceiving the neighborhood as safe, and having inactive parents (63.7% chance for high ST). In the younger group, the greatest chances of having high CST were among those who were in the last elementary school years, who were girls, and who did not have friends in the neighborhood (73.1% chance for high CST), whereas in the older group, the greatest chance for having high CST was among those who were girls and had a TV in the bedroom (74.3% chance for high CST).ConclusionTo counteract ST and boost MVPA among youths, a specific focus on girls, the promotion of sport participation and facilities, neighborhood safety, and involvement of family must be prioritized.  相似文献   

ICEM & SIIE 2011 Joint Conference “Old meets new - media in education” – A review     

Lúcia Pombo  Maria José Loureiro  Marina McIsaac  João Correia de Freitas 《Educational Media International》2013,50(1):77-80

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Modern chemistry,red in tooth and claw     

Simões  Ana 《Metascience》2010,19(3):485-488

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A multilevel hypernetworks approach to capture meso-level synchronisation processes in football     

João Ribeiro  Rui Lopes  Pedro Silva  Duarte Araújo  Daniel Barreira  Keith Davids 《Journal of sports sciences》2020,38(5):494-502

ABSTRACT

Understanding team behaviours in sports performance requires understanding the interdependencies established between their levels of complexity (micro-meso-macro). Previously, most studies examined interactions emerging at micro- and macro-levels, thus neglecting those emerging at a meso-level (reveals connections between player and team levels, depicted by the emergence of coordination in specific sub-groups of players–simplices during performance). We addressed this issue using the multilevel hypernetworks approach, adopting a cluster-phase method, to record player-simplice synchronies in two performance conditions where the number, size and location of goals were manipulated (first-condition: 6 × 6 + 4 mini-goals; second-condition: Gk + 6 × 6 + Gk). We investigated meso-level coordination tendencies, as a function of ball-possession (attacking/defending), field-direction (longitudinal/lateral) and teams (Team A/Team B). Generally, large synergistic relations and more stable patterns were observed in the longitudinal direction of the field than the lateral direction for both teams, and for both game phases in the first condition. The second condition displayed higher synchronies and more stable patterns in the lateral direction than the longitudinal plane for both teams, and for both game phases. Results suggest: (i) usefulness of hypernetworks in assessing synchronisation of teams at a meso-level; (ii) coaches may consider manipulating these task constraints to develop levels of local synchronies within teams.  相似文献   

Let the Aryanists know! Brazilian race and nation in the 1938 France World Cup     

Tiago J. Maranhão 《Soccer & Society》2019,20(7-8):912-922

ABSTRACT

Getúlio Vargas’ dictatorship (1937-1945) attributed to sports a key role to foment the formation of a ‘new Brazil’, using football as a crucial element to promote the state nationalist policy. A propitious moment for this attempt would be an international event, a space in which Brazil could demonstrate to the civilized nations – especially to the European countries – the best qualities of ‘the Brazilian race’. This arena was the 1938 World Cup, played in France. This essay presents some aspects of the relationship between football and the construction of Brazil’s national identity in the early twentieth century. My focus on the 1938 World Cup is due to the fact this was a quintessential event not only for the history of Brazilian sports but also for the debates on scientific racism and the construction of national identity. This event shaped, more than eight decades ago, the ways through which football articulated the core commonality of the Brazilian society, becoming one of the key elements to understand contemporary Brazil.  相似文献   

Rank-based self-training for graph convolutional networks     

Daniel Carlos Guimarães Pedronette  Longin Jan Latecki 《Information processing & management》2021,58(2):102443

Graph Convolutional Networks (GCNs) have been established as a fundamental approach for representation learning on graphs, based on convolution operations on non-Euclidean domain, defined by graph-structured data. GCNs and variants have achieved state-of-the-art results on classification tasks, especially in semi-supervised learning scenarios. A central challenge in semi-supervised classification consists in how to exploit the maximum of useful information encoded in the unlabeled data. In this paper, we address this issue through a novel self-training approach for improving the accuracy of GCNs on semi-supervised classification tasks. A margin score is used through a rank-based model to identify the most confident sample predictions. Such predictions are exploited as an expanded labeled set in a second-stage training step. Our model is suitable for different GCN models. Moreover, we also propose a rank aggregation of labeled sets obtained by different GCN models. The experimental evaluation considers four GCN variations and traditional benchmarks extensively used in the literature. Significant accuracy gains were achieved for all evaluated models, reaching results comparable or superior to the state-of-the-art. The best results were achieved for rank aggregation self-training on combinations of the four GCN models.  相似文献   

Human Anatomy: Teaching–Learning Experience of a Support Teacher and a Student with Low Vision and Blindness     

Carolina Rodrigues Mendonça  Karla Tais de Oliveira Souza  Jalsi Tacon Arruda  Matias Noll  Nilza Nascimento Guimarães 《Anatomical sciences education》2021,14(5):682-692

In Brazil, a federal law ensures that all students with disabilities are entitled to enrollment in higher education institutions. Higher courses in human anatomy stand out for their complexity in both theoretical and practical contents. Therefore, adaptation is required to accommodate students with special educational needs. This study aimed to describe the experience of a Support Teacher in the development of inclusive pedagogical practices for the discipline of Human Anatomy offered in the physiotherapy course for a student with low vision and blindness. The challenges and learning difficulties faced by a visually impaired student are reported. Qualitative analysis was performed by interviewing a student with low vision and blindness and a Support Teacher. The audio recordings were transcribed, categorized, and analyzed using content analysis. The Support Teacher created schematics and drawings of anatomical structures, reviewed theoretical and practical contents, developed adaptations of the examinations, and applied palpatory anatomy to facilitate the student’s learning process. The findings illustrate that the student faced the greatest difficulty in dealing with the emotional aspects, due to the inability to visualize the anatomical details in human cadavers. Thus, the presence of a Support Teacher was fundamental to ensure that the student could learn the content and overcome this limitation. In conclusion, personalized adaptation, commitment, and collaborative work between the Support Teacher and students with low vision and blindness improve their learning conditions.  相似文献   

The COVID-19 epidemic in Brazil: how statistics education may contribute to unravel the reality behind the charts     

da Silva  Alexandre Sousa  Barbosa  Maria Tereza Serrano  de Souza Velasque  Luciane  da Silveira Barroso Alves  Davi  Magalhães  Marcos Nascimento 《Educational Studies in Mathematics》2021,108(1-2):269-289

Educational Studies in Mathematics - The world is now facing the most severe health, social, and economic event of the last hundred years, which has made the need to acquire statistical thinking to...  相似文献   

The pathways to higher education: lexical availability in adult candidate students and in young first-year students     

Luís Filipe Barbeiro  Cláudia João  Susana Santos 《International Journal of Lifelong Education》2013,32(3):309-329

In the past few years there has been an increase in the number of adult students in higher education courses, many of whom have returned to school after a break. Most of these students do not intend to continue their studies from the point where they stopped; rather, they want to prepare for specific tests in order to have direct access to higher education courses, which in Portugal is a legal option for students over the age of 23. In response to this new cohort, higher education institutions need to find out what kind of students these are, determining their characteristics, capabilities and major problems, if they are to provide them with successful learning opportunities alongside younger students. This article presents a comparative study of lexical competence, focusing on lexical availability, contrasting those adult applicants to higher education who are attending a course preparatory to higher education with first-year students who have just entered higher education. The results show significant differences between the two groups, the adult group in general showing poorer results. Their withdrawal from schooling is clearly reflected in their vocabulary activation with regard to transversal themes. The most salient contrasts are related to the number of words mentioned and the frequency of words in the group, as well as the greater or lesser proximity to the topic of the terms mentioned.  相似文献   

FOUR GENERATIONS OF COMMUNITY COLLEGE LEADERSHIP     

Leila Gonzãlez Sullivan 《Community College Journal of Research & Practice》2013,37(8):559-571

Four generations of community college presidents are identified and described: the founding fathers, the good managers, the collaborators, and the millenium generation. Using the framework developed by Bolman and Deal (1991), the leadership styles of these four groups are compared, with particular attention given to the current and emerging generations. A shift in style is predicted from the participatory approach preferred by presidents in the 1990s to one that allows for just-in-time responses to workforce training needs and dramatic changes in higher education resulting from globalization and the technology explosion.  相似文献