Digital inclusion in Chile: Internet in rural schools

This paper analyzes the teacher's contribution to improving digital inclusion in Chilean rural schools, using a multidimensional definition of the digital divide. Data was obtained from interviews and surveys applied to teachers and students from 145 rural schools. Results show that teachers function as gatekeepers. They do not teach students how to use ICT explicitly, but when teachers have high expectations, skills and technology access, this leads to conditions for students learning how to use ICT. Finally, the data contributes to a better understanding of the new role that teachers and schools play in rural areas in terms of social and symbolic integration.     

Expresión facial y reconocimiento de emociones en lactantes

Resumen

En esta revisión presentamos los resultados e implicaciones de los trabajos realizados por nuestro equipo de investigación sobre expresión y reconocimiento de emociones en la infancia. Dichos trabajos se enfocan desde una perspectiva psicobiológica, asumiéndose que un conjunto de emociones consideradas básicas son estados discretos del organismo, determinados genéticamente y regulados por estructuras nerviosas subcorticales, que tienen un valor adaptative para los individuos bajo determinadas circunstancias estimulares. Situándonos dentro de la tradición de estudios que apoyan la hipótesis de la universalidad de la expresión facial, aportamos una serie de datos que nos conducen a concluir que los lactantes son capaces de expresar y de discriminar desde los tres meses de edad las emociones de alegría, ira, miedo, sorpresa, desagrado y tristeza. Estos datos han sido obtenidos utilizando un paradigma de habituación visual y un método objetivo de análisis denominado Facial Action Coding System. A pesar de contar con estas pruebas empíricas, terminamos matizando que aún desconocemos los factores evolutivos que originan las expresiones emocionales.     

Interpersonal coordination tendencies shape 1-vs-1 sub-phase performance outcomes in youth soccer

This study investigated the influence of interpersonal coordination tendencies on performance outcomes of 1-vs-1 sub-phases in youth soccer. Eight male developing soccer players (age: 11.8 ± 0.4 years; training experience: 3.6 ± 1.1 years) performed an in situ simulation of a 1-vs-1 sub-phase of soccer. Data from 82 trials were obtained with motion-analysis techniques, and relative phase used to measure the space-time coordination tendencies of attacker-defender dyads. Approximate entropy (ApEn) was then used to quantify the unpredictability of interpersonal interactions over trials. Results revealed how different modes of interpersonal coordination emerging from attacker-defender dyads influenced the 1-vs-1 performance outcomes. High levels of space-time synchronisation (47%) and unpredictability in interpersonal coordination processes (ApEn: 0.91 ± 0.34) were identified as key features of an attacking player's success. A lead-lag relation attributed to a defending player (34% around -30° values) and a more predictable coordination mode (ApEn: 0.65 ± 0.27, P < 0.001), demonstrated the coordination tendencies underlying the success of defending players in 1-vs-1 sub-phases. These findings revealed how the mutual influence of each player on the behaviour of dyadic systems shaped emergent performance outcomes. More specifically, the findings showed that attacking players should be constrained to exploit the space-time synchrony with defenders in an unpredictable and creative way, while defenders should be encouraged to adopt postures and behaviours that actively constrain the attacker's actions.     

Supporting Faculty Grassroots Leadership

Various factors are making faculty leadership challenging including the rise in part-time and non-tenure-track faculty, the increasing pressure to publish and teach more courses and adopt new technologies and pedagogies, increasing standards for tenure and promotion, ascension of academic capitalism, and heavy service roles for women and people of color. This article focuses on describing actions taken by institutional agents and aspects of campus environments which are supportive of grassroots faculty leadership. While there are many conditions which inhibit faculty leadership (i.e., part-time and contingent faculty trends, rising publication standards, etc.), our study demonstrated certain campus conditions or characteristics can overcome the forces of change including counting leadership as service, creating campus networks, addressing dysfunctional department dynamics, fostering role models, supporting faculty who question or challenge decisions, ensuring flexibility and autonomy, and altering contingent faculty contracts to include service and leadership.

Fast implementation of two-dimensional singular spectrum analysis for effective data classification in hyperspectral imaging

Although singular spectrum analysis (SSA) has been successfully applied for data classification in hyperspectral remote sensing, it suffers from extremely high computational cost, especially for 2D-SSA. As a result, a fast implementation of 2D-SSA namely F-2D-SSA is presented in this paper, where the computational complexity has been significantly reduced with a rate up to 60%. From comprehensive experiments undertaken, the effectiveness of F-2D-SSA is validated producing a similar high-level of accuracy in pixel classification using support vector machine (SVM) classifier, yet with a much reduced complexity in comparison to conventional 2D-SSA. Therefore, the introduction and evaluation of F-2D-SSA completes a series of studies focused on SSA, where in this particular research, the reduction in computational complexity leads to potential applications in mobile and embedded devices such as airborne or satellite platforms.