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

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.     

A constructivist approach to studying the bullwhip effect by simulating the supply chain

The Cider Game is a simulator for a supply chain-related learning environment. Its main feature is that it provides support to students in the constructivist discovery process when learning how to make logistics decisions, at the same time as noting the occurrence of the bullwhip phenomenon. This learning environment seeks a balance between direct instruction in the learning process on the part of the tutor, and a suitable and sufficient degree of freedom to regulate independent learning on the part of students. This article describes the basic learning mechanisms using the Cider Game and the graphical learning environments that it provides. We describe the functionality provided by this application, and analyse the effect over the rational understanding of the bullwhip phenomenon by the students and whether they are able to make decisions to minimise its impact, studying the differences when that decision-making learning is done individually or in groups.     

Do classroom exemplars promote the application of principles in teacher education? A comparison of videos,animations, and narratives

Students learned about teaching principles with a multimedia program that either did not include a classroom exemplar illustrating how to apply the learned principles to the teaching practice (control group) or included a classroom exemplar in video, animation, or text format. Across two experiments, video and animation groups reported more favorable attitudes towards learning and were better able to apply the learned principles than the control group. Text and control groups did not differ in their learning or attitudes towards learning, suggesting that format is an important factor in determining the effectiveness of classroom exemplars as pedagogical tools for teacher education. Results encourage the use of visual classroom exemplars to promote the application of theory into practice.     

Mediation role of cardiorespiratory fitness on the association between fatness and cardiometabolic risk in European adolescents: The HELENA study

PurposeThis study was aimed to analyze the mediation role of cardiorespiratory fitness (CRF) on the association between fatness and cardiometabolic risk scores (CMRs) in European adolescents.MethodsA cross-sectional study was conducted in adolescents (n = 525; 46% boys; 14.1 ± 1.1 years old, mean ± SD) from 10 European cities involved in the Healthy Lifestyle in Europe by Nutrition in Adolescence study. CRF was measured by means of the shuttle run test, while fatness measures included body mass index (BMI), waist to height ratio, and fat mass index estimated from skinfold thicknesses. A clustered CMRs was computed by summing the standardized values of homeostasis model assessment, systolic blood pressure, triglycerides, total cholesterol/high-density lipoprotein cholesterol ratio, and leptin.ResultsLinear regression models indicated that CRF acted as an important and partial mediator in the association between fatness and CMRs in 12–17-year-old adolescents (for BMI: coefficients of the indirect role β = 0.058 (95% confidence interval (95%CI): 0.023–0.101), Sobel test z = 3.11 (10.0% mediation); for waist to height ratio: β = 4.279 (95%CI: 2.242–7.059), z =3.86 (11.5% mediation); and for fat mass index: β = 0.060 (95%CI: 0.020–0.106), z = 2.85 (9.4% mediation); all p < 0.01).ConclusionIn adolescents, the association between fatness and CMRs could be partially decreased with improvements to fitness levels; therefore, CRF contribution both in the clinical field and public health could be important to consider and promote in adolescents independently of their fatness levels.     

Enhancing consent forms to support participant decision making in multimodal learning data research

Advances in the field of multimodal learning analytics (MMLA) research is often accomplished by actively exploring new technologies and techniques related to the collection and analysis of data. Exploration of ethical principles and procedures for governing the use of new technologies and techniques, however, is not as readily pursued. As collected data grow in complexity and invasiveness, potentially, a growing need is arising to scrutinize ethical aspects of MMLA research. In our study, we introduce an informed consent comprehension test for educational technology research and assess the effects of enhancing MMLA consent forms on comprehension of informed consent and on rates of enrollment in a MMLA study. One form is written from a researcher perspective and the other from a participant perspective. Results of the study involving first-year undergraduate students suggest that the overall level of comprehension did not differ between conditions. Yet, the participant-oriented consent form resulted in significantly lower rates of enrollment. Implications for MMLA researchers are discussed.     

Who is willing to pay for science? On the relationship between public perception of science and the attitude to public funding of science

This article examines the relationship between the general public's understanding of science and the attitude towards public funding of scientific research. It applies a multivariate and discriminant analysis (Wilks' Lambda), in addition to a more commonly used bivariate analysis (Cramer's V), to data compiled from the Third National Survey on the Social Perception of Science and Technology in Spain (FECYT, 2006). The general conclusion is that the multivariate analysis produces information complementary to the bivariate analysis, and that the variables commonly applied in public perception studies have limited predictive value with respect to the attitude towards public funding of scientific research.     

A Mirage of Change: Visibility of Politicians on TVE during the 2015 and 2016 General Elections

ABSTRACT

The use of strategies to enhance the media visibility of politicians intensifies above all at election time and their focus is chiefly television due to the fact that it still has the greatest power to sway voters. Thus, based on a content analysis of the evening news on Televisión Española (TVE) and 18 semi-structured in-depth interviews with professionals working at the Spanish public broadcaster, the airtime that politicians were given was established to assess whether it had fulfilled its obligation as regards independence and pluralism at two crucial moments for Spanish politics: the period prior to the election calls, the pre-campaign periods and the official campaigns before the general elections held on 20 December 2015 and 26 June 2016. Both were unique in their own way: on the one hand, the debut of new political parties with the potential to win a large number of seats in Parliament; and, on the other, despite the fact that in just six months the party in power had lost its absolute majority and there were still no visible signs of change at TVE, it is still worth examining the variations in news treatment prior to both elections.     

Distributed data-driven UAV formation control via evolutionary games: Experimental results

This work proposes a novel data-driven distributed formation-control approach based on multi-population evolutionary games, which is structured in a leader-follower scheme. The methodology considers a time-varying communication graph that describes how the multiple agents share information to each other. We present stability guarantees for configurations given by time-varying interaction networks, making the proposed method suitable for real-world problems where communication constraints change along the time. Additionally, the proposed formation controller allows for an agent to leave or enter the group without the need to modify the behaviors of other agents in the group. This game-theoretical approach is evaluated through numerical simulations and real outdoors experimental results using a fleet of aerial autonomous vehicles, showing the control performance.     

Interactive Multimodal Learning Environments

What are interactive multimodal learning environments and how should they be designed to promote students’ learning? In this paper, we offer a cognitive–affective theory of learning with media from which instructional design principles are derived. Then, we review a set of experimental studies in which we found empirical support for five design principles: guided activity, reflection, feedback, control, and pretraining. Finally, we offer directions for future instructional technology research.