Growth and body composition in Brazilian female rhythmic gymnastics athletes

Abstract

The aim was to analyse the physical growth and body composition of rhythmic gymnastics athletes relative to their level of somatic maturation. This was a cross-sectional study of 136 athletes on 23 teams from Brazil. Mass, standing height and sitting height were measured. Fat-free and fat masses, body fat percentages and ages of the predicted peak height velocity (PHV) were calculated. The z scores for mass were negative during all ages according to both WHO and Brazilian references, and that for standing height were also negative for all ages according to WHO reference but only until 12 years old according to Brazilian reference. The mean age of the predicted PHV was 12.1 years. The mean mass, standing and sitting heights, body fat percentage, fat-free mass and fat mass increased significantly until 4 to 5 years after the age of the PHV. Menarche was reached in only 26% of these athletes and mean age was 13.2 years. The mass was below the national reference standards, and the standing height was below only for the international reference, but they also had late recovery of mass and standing height during puberty. In conclusion, these athletes had a potential to gain mass and standing height several years after PHV, indicating late maturation.     

Ethical Practices and Implications in Distance Learning Ugur Demiray and Ramesh C. Sharma,Eds.

The purpose of this study was to determine the efficacy of traditionally spoken linguistic analysis approaches for understanding the nature and outcomes of online interaction. The study took place with twenty-eight elementary school teachers in ten suburban Chicago schools involved in a technology-supported, problem-based learning curriculum development effort. The asynchronous and face-to-face communications of participants were monitored to test the utility of linguistic discourse variables for understanding interaction. The evidence showed that similar sense-making and interaction strategies are used in both face-to-face and online dialogue but that the strategies were significantly more prevalent in the face-to-face than online dialogue. When critical reflection was studied as an outcome of both forms of dialogue, asynchronous electronic communication was significantly more reflective than face-to-face discourse.     

Reification and recognition in teenage years in the contemporary world: An interpretation based on a critical look at Axel Honneth's theses

Abstract

This article seeks to explore the theoretical contributions of Axel Honneth, particularly in his works, The Struggle for Recognition and Reification, aiming at diving deep into the debate on the contemporary ideological expressions and their incidence in the process of subjective constitution in teenage years. This particular interest springs from the need to interweave the concepts of reification, forgetfulness and recognition within a fruitful theoretical field in order to interpret a project work called Hip-Hop: cultures and identities, developed with teenagers in a public school in the city of São Paulo, Brazil. From our point of view, the concepts of reification and forgetfulness are fundamental to identify how the conservative ideological expressions are present in the imaginary of adolescents in the contemporary world. Although rereading the concepts of reification and forgetfulness, as proposed by the author, is regarded as essential for understanding the ideological expressions that are based on and guided by consumption. However, even though we acknowledge Honneth's efforts toward moving forward with the concept of reification, it is crucial to emphasize the mediation concept Lukács explored in his work, History and Class Consciousness, so as to elucidate how the forgetfulness of the primary recognition relations is processed.     

The point of view of firms in Minas Gerais about the contribution of universities and research institutes to R&D activities

The purpose of this paper is to analyze the interactions between firms, universities and research institutes based in Minas Gerais, Brazil. The theoretical standpoint is the innovation system of developing countries. Multivariate cluster analysis is used, more specifically, the Grade of Membership method, to group firms with similar characteristics and evaluate their pattern of interaction with universities and research institutes. The main results show that the highest rates of interaction are found among firms that manufacture chemical products, cellulose, paper and paper products, followed by those engaged in the extraction of metallic and non-metallic minerals.     

Child sex tourism in the context of the 2014 FIFA Football World Cup: the case of the host city of Recife,Brazil

This study aims to analyse the issue of child sex tourism (CST) and its correlation with sporting mega-events, taking into consideration the implementation of preventive public policy in the host city of Recife (located in the north-east of Brazil), during the 2014 FIFA Football World Cup. Through a qualitative approach based on a three-year longitudinal study – using interviews, observation and photographs – the theme will be analysed by considering the involved social issues, and the implications for excluded sectors of society in the organization of so-called mega-events. A total of 36 interviews were conducted with 22 individuals, who were divided into three groups: project managers, local population and children abused. CST does not occur in a vacuum and cannot be disconnected from more general social, economic and cultural concerns, which are often overlooked in analyses. Although this study is based upon a short-term timescale, the results obtained in the analysed projects have been satisfactory, but over the long term, effective social and educational measures must be prioritized in order to improve the situation for the actors involved. As part of a sporting mega-event, the topic of child sex tourism remains marginal, particularly in countries where social inequality persists.     

Positive Aging Beyond “Success”: Towards a More Inclusive Perspective of High Level Functioning in Old Age

Successful aging is the ability to maintain low probability of disease and disability, high cognitive and physical functioning, and active engagement with life (Rowe &; Kahn, 1999 Rowe, J. W. &; Kahn, R. L. (1999). Successful aging. New York, NY: Dell Pub. [Google Scholar]). These criteria allow for a minority of people to be classified as being “successful” and overlook the importance of psychological variables in balancing the weight of disease. A total of 1322 seniors (55 + years) were classified on their overall functioning according to core domains (health, psychological, cognitive, biobehavioural, social, personality). Findings support the idea that a broader perspective of aging outcomes, rather than success criteria, may better reflect reality.     

Output-feedback binary adaptive control of MIMO systems using monitoring function

The problem of adaptive control design for multivariable linear time-invariant plants with unknown control direction is considered. A solution is proposed based on the SDU factorization of the high frequency gain matrix (HFG) and the monitoring function approach. The adaptation scheme is the binary model reference adaptive control (BMRAC) which utilizes parameter projection and sufficiently high adaptation gains. The signs of the leading principal minors of the HFG define the control directions, and the lack of knowledge of which is a major challenge in the multivariable framework. The role of the monitoring function is to monitor the output error transient and then provide the necessary changes of the adaptation gain signs to guarantee a stable adaptive control. In addition to proving the signal boundedness of the resulting closed-loop system, the output tracking error is shown to be asymptotically as well as exponentially practically stable, i.e., exponentially stable with respect to a small residual compact set of size inversely proportional to the BMRAC adaptation gain. The latter implies good transient properties of the output tracking error in contrast to conventional adaptive laws which only guarantee asymptotic stability but can lead to extremely slow error convergence. The extension of the proposed approach to matched disturbances is also briefly discussed following the classical paradigm of disturbance estimators. Numerical results with a visual servoing application illustrate the efficiency of the proposed method.     

Development and validation of a theoretically based,multidimensional questionnaire of student evaluation of university teaching

The authors describe the development and validation of a multidimensional instrument of students’ evaluation of university teaching (the Pedagogical Questionnaire of the University of Porto). The goal was to develop an instrument based on a sound psychometric analysis and simultaneously supported by the learning theory. Based on the data from 4875 questionnaires, the present study examined the fit of the proposed multidimensional model of university teaching to the whole sample and to various specific university programmes of study using confirmatory factor analysis (AMOS 5.0). Results clearly supported the applicability of the proposed model for the whole university and across programmes of study, demonstrating the validity and reliability of the instrument in evaluating several distinct dimensions of the quality of university teaching.