To be or not to be an excellent football referee: different experts’ viewpoints

Football is central to the lives of countless individuals around the globe. While most of the attention of those passionate about the sport is focused on the players, football referees are often just as important in shaping the outcome of the games. Therefore, research is increasingly examining the role of referees. Even so, our understanding of the factors that create an excellent football referee is still scarce.

Based on our analysis of the opinions of 24 football experts, we demonstrate the multidimensionality of excellence in the performance of football referees. From a Categorical Principal Components Analysis (CatPCA), we were able to pinpoint that football referee excellence is shaped by three distinct dimensions: individual preparation, game preparation and game management. Additionally, we were able to see if these perceptions were different from individuals “within” the game versus those “outside” the game. Namely, we used CatPCA to graphically display the main correlations between the latent dimensions of football refereeing performance and the “inside” and “outside” perspective of the game. The findings of our work contribute towards the knowledge of the factors that shape football referee excellence, while also highlighting areas in need of additional research attention.     

Protective effects of therapeutic cold and heat against the oxidative damage induced by a muscle strain injury in rats

Abstract

The mechanisms of action of physical agents commonly used to treat skeletal muscle lesions are not well understood. In this study, we examined whether the modulation of oxidative stress is involved in the beneficial effects of cold and heat on gastrocnemius muscle strain injury. Adult male Wistar rats were submitted to a strain injury and treated with therapeutic agents in an isolated or combined form. Strain damage caused an increase in muscle and blood oxidative damage. We suggest that this oxidative damage might be related to the impairment of the muscle cell structure, since we observed a significant positive correlation between increased plasma creatine kinase activity and both oxidized dichlorofluoresceine and lipid peroxidation levels in muscle and blood. The intensity of the inflammatory response appears also to be an important factor in the genesis of oxidative damage immediately following a muscle strain injury. Therapeutic cold seems to be more effective in preventing the damage induced by a strain injury, possibly due to its capacity to control the impairment of muscle cell structure and to modulate the intensity of the inflammatory response that follows a muscle strain injury.     

The transformation of doctoral education: a systematic literature review

Higher Education - Framed by a wide range of factors, doctoral education has undergone a deep transformation, especially in the last two decades. The aim of this systematic literature review was to...     

Short animation movies as advance organizers in physics teaching: a preliminary study

Background : Advance organizers are instructional materials that help students use previous knowledge to make links with new information. Short animation movies are a possible format and are well suited for physics, as they can portray dynamic phenomena and represent abstract concepts.

Purpose : The study aimed to determine guidelines for the construction of an instructional short animation movie, with the role of an advance organizer. A film was created in order to evaluate the effectiveness of the approach, making part of a physics lesson and concerning the subject ‘moment of a force’.

Sample : The study took place in a Brazilian school in the city of Arapoti, in the south region of the country. Thirty-eight students participated, having an average age of 16 and following the third year of high school.

Design and methods : Criteria drawn from a literature review directed the construction of the movie and the lesson. Data were collected using pre- and post-tests; registers of oral comments were also done during the class. The post-test included open-ended questions, allowing students to write remarks concerning the lesson and the animation.

Conclusions : The article describes steps and guidelines to orient the process of designing an animation movie with the role of advance organizer. Data indicated that the movie facilitated the construction of links between pre-existent knowledge and the new information presented in the lesson. The proposed methodology can be considered a valid framework to derive similar approaches.     

Youth Oppression as a Technology of Colonialism: Conceptual Frameworks and Possibilities for Social Justice Education Praxis

In this article, we conceptualize youth oppression as a social justice issue using SJE frameworks including Adams’ levels of oppression, Bell's defining features of oppression, Hardiman et. al.'s matrix of oppression, Young's Five Faces, and Love's internalized oppression. We examine youth as a social identity group, and youth oppression as a mechanism through which the roles of dominant and subordinate are installed on all humans, and through which we are socialized to participate in the maintenance and perpetuation of other forms of oppression.

This conceptualization of youth oppression is rooted in examination of discourses that create childhood as a subordinate social status in relation to adults, and parallels with certain discourses of colonialism. Examination of parallels between discourses that create childhood and some of the discourses of colonialism illuminate youth oppression as a technology of colonialism. Colonialism, a complex oppressive system operating on multiple levels, maintains unequal, hierarchical relationships. Examining colonialism provides a lens through which to view the broader systemic and global connections that formulate oppression. The relationships within which youth oppression occurs often obscures these systemic, multi-level global connections.

We propose youth oppression as a generative theme in social justice praxis. Implications include transforming how we conceptualize, contextualize, and strategize SJE praxis, and changing how we think about the oppression of humans and possibilities for liberation.