The prepositional calculiC n , 1 n introduced by N.C.A. da Costa constitute special kinds of paraconsistent logics. A question which remained open for some time concerned whether it was possible to obtain a Lindenbaum''s algebra forC n . C. Mortensen settled the problem, proving that no equivalence relation forC n . determines a non-trivial quotient algebra.The concept of da Costa algebra, which reflects most of the logical properties ofC n , as well as the concept of paraconsistent closure system, (...) are introduced in this paper. (shrink)

Mexico's pandemic management and the absence of measures have been harshly criticized as being disproportionate. This paper examines whether the proportionality principle was properly applied to Mexico's COVID-19 response and outlines three reasons against such an endeavor, namely (i) the content of “proportionate measures” remained insufficiently well defined, (ii) there were yet fundamental rights conflicts to resolve, and (iii) the situation was moreover characterized by epistemic uncertainty.

La violencia en México, específicamente en algunos estados de la República mexicana en donde la población se enfrenta a situaciones de peligro, tiene como una de tantas consecuencias la ausencia de personal médico que se desempeñe como profesional y proporcione servicios de salud en estas zonas rurales. En este sentido, es de considerar que la asignación de recursos humanos en salud es fundamental para el funcionamiento de un sistema eficiente y observar las causas por las que médicos que desde el (...) servicio social hasta el desempeño de su especialidad no consideran trabajar en lugares en donde se sienten vulnerables. En este proceso, es importante visibilizar los cuestionamientos éticos que pueden surgir por lo que este trabajo pretende dar importancia al tema de la exposición de circunstancias, hechos y cifras dentro de esta problemática y plantear las cuestiones normativas pertinentes dentro de este contexto. (shrink)

Las obras históricas escritas en la época de la Reforma y el Segundo Imperio Mexicano, así como su discusión en la prensa, son importantes para la construcción del Estado mexicano moderno. Se analiza la recepción que tuvo en los periódicos un corpus de obras históricas representativas escritas por liberales y conservadores, publicadas entre 1856 y 1874.

While there is abundant research on innovations, we know little about why and when the commercialization of highly contested innovations, such as genetically modified (GM) crops, is approved by governments. In this paper, we argue that governments' decision to approve the commercialization of GM crops is influenced by heuristics based on the decisions of other governments with which they have greater trade, the gap between country performance and aspiration, and governments' prior decisions on GM crops field trials. We further propose (...) that the effect of these heuristics weakens when the government operates in countries with higher governance quality. Using data on approval of GM crop commercialization between 1991 and 2016, we found support for these arguments and suggest the joint effects of heuristics based on the decisions of trade partners and governance quality on governments' approval of GM crop commercialization. (shrink)

El Espacio Europeo de Educación Superior (EEES) establece que el aprendizaje debe estar centrado en el estudiante. Partiendo de este enunciado, el artículo explica cómo la gamificación puede ser una técnica pedagógica que propicie el ansiado cambio en la docencia universitaria hacia donde marca el EEES. Este trabajo presenta el diseño de una metodología de gamificación sencilla y fácil de implementar en un Grado de Ingeniería utilizando Kahoot! como herramienta y su evolución a lo largo de tres cursos académicos. Los (...) resultados indican que los alumnos ven más atractiva la asignatura, aumenta el seguimiento y mejoran sus resultados académicos. (shrink)

El objetivo del presente artículo es el de Contribuir al conocimiento y reflexión sobre las experiencias que enfrenta el personal médico en situaciones críticas. Se llevaron a cabo once entrevistas a médicos en diversas regiones del país, utilizando un guion elaborado a partir de una revisión de la literatura en artículos académicos y medios de comunicación en línea. Con los datos recopilados, se construyó una matriz y se realizó un análisis temático. Se identificaron cinco conjuntos de temas: (i) Información general (...) de los médicos y motivos para trabajar en zonas críticas; (ii) efectos de la violencia y la pandemia por COVID-19 en la prestación de servicios de salud; (iii) Recursos en salud; (iv) La ambivalencia del triaje: alivio ante la escasez, pero descontento moral hacia los médicos y (v) Gobernanza y políticas públicas. Como conclusiones se puede decir que la interacción de dos situaciones críticas, la violencia y la pandemia de COVID-19, plantea desafíos éticos que requieren una reflexión profunda. (shrink)

The scientific literature highlights the risk of the appearance of internalizing and externalizing symptoms, together with difficulties in the academic area, linked to diagnosis of Attention Deficit Hyperactivity Disorder. This is normally assessed by teachers and primary caregivers, disregarding the self-perception of the adolescents themselves, which limits detection of this disorder at an evolutionary stage. Our aim was to analyze the psychometric properties of a self-report for ADHD in adolescence and its relationship with psychopathology and academic performance. This study assessed (...) an incidental sample of 267 students from secondary schools in the Region of Murcia, Spain, using the EDAH questionnaire adapted for self-report, in order to analyze its psychometric properties in assessing ADHD. The Youth Self-Report and the Brief Self-Control Scale were also used to determine their association with psychopathological, self-control and academic performance variables. An ADHD prevalence of between 3.7 and 13.1% was observed depending on the established cut-off point. The adapted EDAH showed adequate reliability indices and explained a high variance percentage. Adolescents with anxiety/depression difficulties, dissocial behavior, aggressiveness, and poor performance in mathematics showed a higher amount of ADHD symptoms. Moreover, self-control, dissocial behavior, age, and performance in Social Sciences acted as predictors of the disorder. The good psychometric properties of this questionnaire and its adequate correspondence with other variables of interest suggest it is an appropriate self-report instrument to assess ADHD in adolescence. (shrink)

Preimplantation genetic diagnosis generates a series of ethical and legal questions: Which goals does it pursue? Does it protect the embryo? Should this technique be regulated by the legal system? And if so, which is the incumbent criteria? This research describes the limits that some international laws regulating this technique have considered. Additionally, a series of judgments about the legal problems that have occurred with the application of this technique will be analyzed, among them, the misdiagnosis.

Cherchant à refonder l’édifice euclidien, Leibniz a formulé une Caractéristique géométrique qui annonce les concepts géneraux de la théorie des ensembles. Dans ce cadre, il a pu en particulier formaliser sa conception du continu. L’intérêt du Pacidius Philalethi (1676) est de montrer qu’en choisissant la conception intensionnelle du continu -position qu’il ne dementira jamais- il sélectionne parmi les images duales celle dont se déduit le changement qualitatif, base d’une philosophie naturelle qui soutiendra encore la dynamique ultérieure. Une tâche se dessine (...) maintenant, soit déduire la nécessité d’un mouvement universei et infiniment varié à partir de ses conditions topologiques.We know that Leibniz intended to bring new foundations to the euclidean geometry and he has according to this view formulate a Characteristica geometrica which announces few general concepts of set theory. Parlicularly he tried to formalise his conception of continuity. Before the main interest of the Pacidius Philalethi (1676) is here: showing us that Leibniz when he chooses an intensional conception of continuity he chooses in the same time the dual image from which be can deduce the qualitative variation. We reckon again these conception at the grounds of his later philosophy of nature. But now we have to follow Leibniz demostrating how universal and infinite variations flow from its topological conditions. (shrink)