Autonomic modulation of heart rate in paraplegic wheelchair basketball players: Linear and nonlinear analysis     

Antonio Roberto Zamunér  Ester Silva  Rosana Macher Teodori  Aparecida Maria Catai  Marlene Aparecida Moreno 《Journal of sports sciences》2013,31(4):396-404

Abstract

This study aimed to evaluate the autonomic modulation of heart rate in sedentary paraplegics and paraplegic wheelchair basketball players with thoracic spinal cord injury below T6. Seven paraplegic wheelchair basketball players (active paraplegic group), five paraplegics who were not involved in regular exercise (sedentary paraplegic group) and 10 able-bodied participants (control group) took part in the study. The heart rate variability was evaluated by linear (low frequency and high frequency band in normalised units and low frequency/high frequency ratio) and nonlinear methods (Shannon entropy, corrected conditional entropy, and symbolic analysis).

The sedentary group presented significantly higher values for low frequency, low frequency/high frequency ratio and symbolic index with no significant variations (0V%), and also lower values for the high frequency and symbolic index with two significant unlike variation (2ULV%) compared to active paraplegic group. Shannon entropy and corrected conditional entropy analyses revealed significantly lower values in the sedentary group than in the control or active paraplegic groups. Paraplegic individuals who regularly undertake physical exercise have higher complexity of R-R interval time series, lower sympathetic modulation, and higher parasympathetic modulation than sedentary paraplegic participants.  相似文献   

Tannins characterization in historic leathers by complementary analytical techniques ATR-FTIR,UV-Vis and chemical tests     

Lina Falcão  Maria Eduarda M. Araújo 《Journal of Cultural Heritage》2013,14(6):499-508

This paper presents a complementary analytical approach to characterize vegetable tanning materials in historic leathers. It is described the application of two molecular spectroscopic techniques, ATR-FTIR and UV-Vis, and three specific chemical tests to analyse tannins present in leathers. Acid butanol, nitrous acid and rhodanine colorimetric tests, evaluated both visually and spectrophotometrically, were used to identify condensed tannins, ellagitannins and gallotannins, respectively. Ten samples of commercial, or laboratory prepared, vegetable tannins and seven new vegetable tanned leathers were also analysed and obtained results were used for comparison. The complete analytical procedure was performed, in a semi-micro-destructive scale, using fibres collected from leather. Analysis of ATR-FTIR and UV spectra of commercial and laboratory prepared vegetable tannins allowed the establishment of the characteristic bands of condensed and hydrolysable tannins and, more specifically, gallotannins. These data were used to confirm the type of vegetable tanning agents used in new leather extracts. The same approach was used in cultural heritage leathers, supported by the colorimetric tests, since protein degradation products were co-extracted in aged leathers and interfered in IR spectra.  相似文献   

Basic values predict doping likelihood     

Christopher Ring  Maria Kavussanu  Bahri Gürpınar 《Journal of sports sciences》2020,38(4):357-365

ABSTRACT

Basic values, defined as trans-situational goals that vary in importance and act as guiding principles in life, have been linked with unethical cognitions, emotions and actions. Their roles in doping, a form of cheating in sport, have yet to established. College athletes reported doping likelihood in hypothetical scenario-based situations and completed measures of basic values, moral disengagement, and anticipated guilt. Correlation analysis showed that doping likelihood was positively associated with self-enhancement values but negatively associated with self-transcendence values and conservation values. Moral disengagement correlated positively with self-enhancement values and negatively with self-transcendence values, whereas guilt correlated positively conservation values and negatively with self-enhancement values and openness to change values. Regression analyses showed that self-enhancement values positively predicted doping likelihood directly, self-transcendence values negatively predicted doping likelihood indirectly via moral disengagement and guilt, and conservation values negatively predicted doping likelihood indirectly via guilt. In line with theory and evidence concerning the relationship between basic value systems and moral thought and action, we found that the values of athletes are directly (self-enhancement) and indirectly (self-transcendence, conservation) linked with likely use of banned performance enhancing substances, an expression of cheating in sport.  相似文献   

The audiovisual action plan: a new audiovisual policy for Ireland     

Maria O’Brien 《Cultural Trends》2019,28(5):417-428

ABSTRACT

This article analyses the recent plan for the audiovisual industries introduced (after some delay) by the Irish Department of Culture, Heritage and the Gaeltacht. The Audiovisual Action Plan (“the Plan”) sets out the Department’s approach to the audiovisual industries and is, it is contended, evidence of a marketization of culture consistent with a creative industries perspective. The analysis of the Plan in a wider policy context identifies key issues shaping audiovisual production in Ireland. Using a thematic analysis approach from Braun and Clark (2005, 2019) a number of themes are developed from analysis of the relevant policy documents, broadly conceived around the increasing instrumentalism of culture. Taking a political economy perspective allows for development of themes around the commodification of the nation-state through the provision of policies that actively encourage a certain type of audiovisual production. Building on Mosco’s work on political economy (Mosco, 2009) the concept of spatialization from Lefebvre (Lefebvre, 1991) is used to interrogate the production of and commodification of space through Specifically, this article interrogates the policy norms underpinning the Audiovisual Action Plan introduced by the Department of Culture, Heritage and the Gaeltacht in Ireland in 2018 as part of Culture 2025, the national cultural policy framework. It identifies the key proposals which affect the audiovisual industries. It is concluded that the Plan (and other relevant policy documents) support a spatialized, commodified view of the audiovisual industries as primarily industrial in nature, paying scant attention to the consideration of such industries as cultural forces.  相似文献   

What matters? Talking value in Australian culture     

Maria O’Brien 《Cultural Trends》2019,28(4):334-335

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A sport for all programme in school: girls’ experiences     

Peter Carlman  Maria Hjalmarsson 《Sport in Society》2019,22(3):416-431

This article examines a Swedish Sport for All Programme (SAP) in school. We use a case study to discuss girls’ debut in alternative sports programme organized in collaboration between school and the sports movement. The empirical data are derived from repeated focus group interviews with one group of seven 10-year-old girls participating in one SAP. The analyses focus on their subjective experiences and how broader gender structures influence these experiences. Drawing on the results of this study, we argue that certain sports can be interpreted as oppressive activities that produce asymmetric power relationships between different groups of children. Simultaneously, the girls see the idea of sports as joyful activities, without male abuse and oppression or hierarchical gender relationships. Based on the girls’ accounts, we claim that both the leaders and the children actively reproduce gender stereotypes in the SAP.  相似文献   

An evaluation of an adaptive learning system based on multimodal affect recognition for learners with intellectual disabilities     

Penelope J. Standen  David J. Brown  Mohammad Taheri  Maria J. Galvez Trigo  Helen Boulton  Andrew Burton  Madeline J. Hallewell  James G. Lathe  Nicholas Shopland  Maria A. Blanco Gonzalez  Gosia M. Kwiatkowska  Elena Milli  Stefano Cobello  Annaleda Mazzucato  Marco Traversi  Enrique Hortal 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(5):1748-1765

Artificial intelligence tools for education (AIEd) have been used to automate the provision of learning support to mainstream learners. One of the most innovative approaches in this field is the use of data and machine learning for the detection of a student’s affective state, to move them out of negative states that inhibit learning, into positive states such as engagement. In spite of their obvious potential to provide the personalisation that would give extra support for learners with intellectual disabilities, little work on AIEd systems that utilise affect recognition currently addresses this group. Our system used multimodal sensor data and machine learning to first identify three affective states linked to learning (engagement, frustration, boredom) and second determine the presentation of learning content so that the learner is maintained in an optimal affective state and rate of learning is maximised. To evaluate this adaptive learning system, 67 participants aged between 6 and 18 years acting as their own control took part in a series of sessions using the system. Sessions alternated between using the system with both affect detection and learning achievement to drive the selection of learning content (intervention) and using learning achievement alone (control) to drive the selection of learning content. Lack of boredom was the state with the strongest link to achievement, with both frustration and engagement positively related to achievement. There was significantly more engagement and less boredom in intervention than control sessions, but no significant difference in achievement. These results suggest that engagement does increase when activities are tailored to the personal needs and emotional state of the learner and that the system was promoting affective states that in turn promote learning. However, longer exposure is necessary to determine the effect on learning.  相似文献   

Why (and how) do teachers engage in social networks? An exploratory study of professional use of Facebook and its implications for lifelong learning     

Maria Ranieri  Stefania Manca  Antonio Fini 《British journal of educational technology : journal of the Council for Educational Technology》2012,43(5):754-769

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Games to Improve Students Information Literacy Skills     

Marina Encheva  Anna Maria Tammaro  Alexandra Kumanova 《International Information and Library Review》2020,52(2):130-138

Abstract

As digital natives enter higher education, there is the need to improve their information skills but they often overestimate their information research skills and are unfamiliar with the library. The serious games give the opportunity for innovative and engaging approaches to information literacy learning. The paper describes NAVIGATE - Information Literacy: a Game-based Learning Approach for Avoiding Fake Content, a project funded by Erasmus?+?program. The Project aims to improve the competences to avoid fake content of the higher education students in the Humanities. The paper focuses on the comparative analysis of the students’ skills gap and the difficulty of actually assessing the learning improvement achieved by games, highlighting the lessons learned and the open issues.  相似文献   

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

Mônica Guimarães Teixeira do Amaral  Maria Patrícia Cândido Hetti 《Educational Philosophy and Theory》2020,52(5):508-523

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.  相似文献