Alberto Rodriguez

Aunque es erróneo creer en un desarrollo tecnológico absolutamente autónomo e independiente de constreñimientos humanos o sociales, la propia impresionante dinámica del actual avance tecnológico hace tentador creer en algún tipo de determinismo tecnológico. En el marco de la teoría de las consecuencias no intencionadas de la acción humana en la historia es posible acomodar una variante moderada, no absoluta de determinismo tecnológico. En ella hay cabida para un reconocimiento objetivo de la contingencia y finitud humanas junto a claras exigencias de responsabilidad

Nowadays, the high-temperature plasticity of yttria-stabilized tetragonal zirconia polycrystals is successfully explained in terms of a threshold stress. Despite the fact that its existence is very well proved experimentally, the origin and nature of the threshold stress are still unexplained. This work develops a possible explanation for the threshold stress in YTZPs. The model developed in this paper is able to explain quantitatively the dependence of this threshold stress with temperature and grain size. The model is able to predict the influence of a glassy phase present at grain boundaries and the values of the threshold stress in YTZP nanocrystals. The theoretical results are discussed and compared with the available data in the literature

The removal of water from mines was one of the key issues that former miners had to deal with. Roman colonists brought new technology to the Iberian Peninsula that addressed this problem. However, they did not invent this technology because it had already been applied to the growth of other endeavours in the Hellenistic society throughout the Eastern Mediterranean. In the mine, the Archimedes screw, waterwheels, bucket pulleys, and Ctesibius pumps were the primary drainage systems. In this essay, the primary characteristics, and modes of operation of machines are examined. Without leaving out the most significant finds made in the southwest of the Iberian Peninsula, one of the regions with the longest history of mining exploitation. To serve as a foundation for future research in this field, this work compares the primary mining mechanisms in ancient Huelva on a qualitative and quantitative level by the implementation of a TOPSIS methodology, a multi-criteria decision analysis method.

This article has deconstructed the general phenomenon of gentrification in the historic centre of A Coruña in two models. On the one hand, a model based on social class promotion, symbolic capital and economic status in the Cidade Vella. On the other hand, the neighbourhood of Orzán as a transformation process resulting from a phenomenon of commercial gentrification based on two interrelated processes: first, the demand for new places of consumption and entertainment and second, the material devaluation of the neighbourhood. In this regard, this work brings a new dimension to the global debate around commercial gentrification.

Este trabajo tiene como objetivo mostrar y proponer una metodología híbrida de enseñanza-aprendizaje de matemáticas universitarias con las primeras experiencias de un modelo educativo emergente elaborado con base en la “Guía para el retorno a las actividades presenciales en la Universidad Autónoma Metropolitana” (México). Con él se desea probar que la educación presencial y remota ofrecen resultados similares de aprendizaje en matemáticas. Para lograr este objetivo hemos aplicado una propuesta metodológica que combina una clase presencial de matemáticas y una vídeo clase en la sala ZOOM con apoyo de material educativo en Power Point y EXCEL. Tamaño de muestra: 70 estudiantes.

This is an observational exploratory study assessing self-concept and its association with depression, anxiety, satisfaction with life, and quality of life 6 months after experiencing a traumatic brain injury. Participants were 33 patients who suffered a traumatic brain injury 6 months before the assessment. The measures used in this study were the Repertory Grid Technique, Patient Health Questionnaire-9, Generalized Anxiety Disorder-7, Satisfaction With Life Scale, and the Quality of Life after Brain Injury. We calculated Euclidean distances to assess differences in pre-and post-injury self-perception, as well as the proportion of opposed pole construct rating and polarization to understand how they are associated with the scores of the other offered measures. We found that the distance between the present and ideal self, as well as the distance between the present self and the self before the lesion showed moderate positive correlations with depression, and negative correlations with satisfaction with life and quality of life. Also, for the present and self before the lesion, the proportion of opposed pole ratings was correlated with depression symptoms, quality, and satisfaction with life, while for the present self and the ideal self this proportion was correlated with all the measures. The proportion of polarization of the present self and the total polarization was negatively correlated with symptom measures. The repertory grid might facilitate a greater understanding of self-concept after traumatic brain injury. This information could be used to guide treatments that address the emotions related to distances observed in the perception of the self.