O professor Paulo Freire faz da sua experiência a mais importante fonte de aquisição de conhecimento, partindo da análise de suas práticas para compreender as maneiras de enfrentar os problemas complexos da vida escolar, como utilizar o conhecimento e como criar novos procedimentos e estratégias. Para o educador, esse tipo de reflexão é mergulhar no mundo de experiência e sentimentos, carregado de valores intercambio simbólico, correspondências afetivas, interesses sociais e ao mesmo tempo perceber, do ponto de vista teórico, o que (...) se passa no mundo da objetividade. (shrink)

Este texto expresa los aspectos ideológicos que respaldan las prácticas del colectivo de la Red Juvenil de Medellín, (Colombia), pensadas y planteadas por ellos mismos. Se evidencian las relaciones y los comportamientos que estos jóvenes generan con el fin de buscar la transformación de la sociedad,..

The critical aspect of Slavoj Žižek’s philosophical system is clearly established. It has allowed us to see the ideological backdrop of late capitalism and its political situation. As we move from critique of ideology to theory proper, the desert of Žižekian politics lies in describing the political implications of a politics of subjectivity. Here, I tackle the question of how should we deal with the post-event rupture, when the morning after demands us to present a viable alternative to the previous (...) system. Engaging with Žižek’s latest works, I find a deadlock: responding to the myriad of anti-Trump movements and actions, Žižek warned us of the dangers of false activity and invites us to further study the conditions that allowed the rise of clownish populists in the first place; concerning the European debate about the refugee crisis, he argues for the strengthening of European borders as well as provide an effective bureaucracy to deal with the influx of refugees, avoiding the liberal leftist naïveté of open borders. Such positions do not sit well with the liberal leftist politics that invite us to combat fascism at all costs and demand a compassionate policy towards the refugees. Here, the question of Žižekian politics becomes clear: is it a form of pragmatism or a revolutionary theory that depends on the collective subject that introduces the rupture to the status quo? I do not argue that it is one or the other; rather, the two sides provoke a dialectical examination of our political situation, where grand revolutionary projects are constantly haunted by the stigma of failure. Hence, Žižekian politics, as a politics of subjectivity, is a politics of the organization of the collective from the margins that will break the status quo; but, as a politics of militantism, collectivity is complemented by the vigorous study of our present situation to be able to properly confront the political crises of our time. (shrink)

Much has been written about Žižek’s critique of ideology and its theoretical boundaries. Beyond the critical aspect of Žižekian philosophy, the desert of Žižekian politics lies in the way subjectivity persists even at the end of great revolutionary mobilizations. In this essay, I deal with the implications of a Žižekian politics based on the theory of subjectivity and the problem of the “morning after”. His rejection of the main currents of leftism opens up the discussion whether Žižekian politics is a (...) call for pragmatism or as a provocation to revolution. To address this issue, this essay proceeds in two ways. First, we study how Vladimir Lenin and Deng Xiaoping gives us two lessons in socialist pragmatism; the lessons we draw from Lenin and Deng allow us to study the problematic faced by the post-revolutionary politics: the need to arrive at a concrete plan to govern the nation and resuscitate the economy. Second, from what we learn as the audacity of Lenin’s strategic retreats and the missed political opportunities in Deng’s economic reforms, I argue that in a politics of militancy, collectivism is complemented by the rigorous study of our present situation. Militancy is an attitude of guarded optimism that complements communist optimism with a critical edge and a level-headed approach to dealing with political problems. (shrink)

Researchers have studied the athletes' dual careers with the aim of helping them to combine the sport and the academic–vocational sphere. Most of this research has addressed the study–sport combination, but there is a lack of studies on the work–sport combination. The main objective of this research was to explore the subjective perceptions of Spanish elite athletes when attempting to combine their careers as professional athletes with a second profession or trade. Further, this study aims to identify the access to (...) facilitating resources and the perception of obstacles and barriers to the development of a dual career. A qualitative approach was chosen to address these research questions. Interpretative phenomenological analysis was carried out on a sample of 18 elite athletes, and the data were collected using semi-structured interviews based on a set of superordinate and subordinate categories. The results showed that the athletes interviewed possessed valuable resources such as the transference of sports values to the work sphere. However, important barriers were highlighted such as the perception of sport institutions as absent entities in the work–sport combination. Thus, the study of this type of dual career seems to be one of the challenges facing the interested scientific community for the coming years. (shrink)

The World Health Organization has declared a world pandemic due to COVID-19. In response, most affected countries have enacted measures involving compulsory confinement and restrictions on free movement, which likely influence citizens' lifestyles. This study investigates changes in health risk behaviors with duration of confinement. An online cross-sectional survey served to collect data about the Spanish adult population regarding health behaviors during the first 3 weeks of confinement. A large sample of participants from all Spanish regions completed the survey. Binomial (...) logistic regressions adjusted for socioeconomic characteristics, body mass index, previous HRBs, and confinement context were conducted to investigate associations between the number of weeks confined and a set of six HRBs. When adjusted, we observed significantly lower odds of experiencing a higher number of HRBs than before confinement overall in a time-dependent fashion: OR 0.63; 95% CI: 0.49–0.81 for the second and OR 0.47; 95% CI: 0.36–0.61 for the third week of confinement. These results were equally consistent in all age and gender subgroup analyses. The present study indicates that changes toward a higher number of HRBs than before confinement, as well as the prevalence of each HRB except screen exposure, decreased during the first 3 weeks of COVID-19 confinement, and thus the Spanish adult population may have adapted to the new situational context by gradually improving their health behaviors. (shrink)

Nowadays, around half of the global population lives in urban areas. This rate is expected to increase up to two-thirds by the year 2050. Most studies analyze urban dynamics in wide geographic ranges, focusing mainly on cities. According to them, the global population is spatially distributed in two extremes: large urban agglomerations and rural deserts. However, this remark is excessively general and imprecise. For this reason, it remains essential to analyze these dynamics at other spatial scales. A close-up look in (...) thinly populated regions shows how urban dynamics are also noticeable. In this paper, we analyze spatiotemporal patterns of population distribution in a predominantly rural area by applying a local-scale approach. These patterns are represented by using spatial networks with nodes representing the human settlements and links showing hierarchies between nodes. This case study is conducted in a small municipality located in northwestern Spain. It is a predominantly rural area with a very particular spatial pattern of population distribution. (shrink)

Localization Wireless Sensor Networks (WSN) represent a research topic with increasing interest due to their numerous applications. However, the viability of these systems is compromised by the attained localization uncertainties once implemented, since the network performance is highly dependent on the sensors location. The Node Location Problem (NLP) aims to obtain the optimal distribution of sensors for a particular environment, a problem already categorized as NP-Hard. Furthermore, localization WSN usually perform a sensor selection for determining which nodes are to be (...) utilized for maximizing the achieved accuracy. This problem, defined as the Sensor Selection Problem (SSP), has also been categorized as NP-Hard. While different metaheuristics have been proposed for attaining a near optimal solution in both problems, no approach has considered the two problems simultaneously, thus resulting in suboptimal solutions since the SSP is biased by the actual node distribution once deployed. In this paper, a combined approach of both problems simultaneously is proposed, thus considering the SSP within the NLP. Furthermore, a novel metaheuristic combining the Black Widow Optimization (BWO) algorithm and the Variable Neighbourhood Descent Chains (VND-Chains) local search, denominated as BWO-VND-Chains, is particularly devised for the first time in the author’s best knowledge for the NLP, resulting in a more efficient and robust optimization technique. Finally, a comparison of different metaheuristic algorithms is proposed over an actual urban scenario, considering different sensor selection criteria in order to attain the best methodology and selection technique. Results show that the newly devised algorithm with the SSP criteria optimization achieves mean localization uncertainties up to 19.66 % lower than traditional methodologies. (shrink)

IntroductionRegular exercise has long been shown to positively impact the immune system responsiveness and improve mental well-being. However, the putative links between biomarkers of mental health and immune efficiency in exercising subjects have been scarcely investigated. The aim of this study was to verify the effect of a 14-week combined chair-based exercise program on salivary steroid hormones and anti-microbial proteins, functional fitness, and MWB indexes in pre-frail older women.MethodsThe participant women were randomly divided into the exercising group and the non-exercising (...) control group. The pre/post assessment included: salivary anti-microbial proteins lysozyme; and immunoglobulin-A ; salivary steroid hormones of testosterone and cortisol ; functional fitness ; MWB questionnaires.ResultsSignificant differences with large Cohen’s effect sizes were found on increased salivary TT after exercise intervention. The results revealed a decrease in IgA levels after CEP. The increase in subjective happiness levels and decrease of stress perception and depressive state were found after intervention in the CEP group. Robust statistical differences in gait speed and balance tests were also found in the CEP group. In control, COR increased moderately while no changes were found for the other indicators. Correlation analyses showed inter-dependence between pre–post variations of MWB, biochemical indexes, and fitness function.ConclusionThe CEP program was able to improve functional-fitness performance, decrease feelings of stress, and increase happiness. The CEP also induced clinically relevant hormonal and immune responses, which suggests that chair exercises that combine muscular strength, balance, and gait speed training are promising interventions to improve physical and mental health of older pre-frail adults. (shrink)