PRIMERAS LÍNEAS SOBRE LA TRADICIÓN EN EL MUNDO GRIEGO

La tradición como concepto en el que se plantean los problemas fundamentales de la memoria oral colectiva es una creación griega. Este ensayo es un análisis de los libros 11 y 111 de la República de Platón, en donde están dados todos los elementos para comprender el tema de la tradición en el mundo griego: el vínculo entre poesía y mitología, el carácter de la mentalidad oral, la actividad de poetas y mitólogos, la relación entre oralidad y escritura, y la fuerza de la tradición como elemento de continuidad en la cultura griega

PRIMERAS LÍNEAS SOBRE LA TRADICIÓN EN EL MUNDO GRIEGO

Tradition as a concept where the main problems of the collective oral memory are considered is a Greek creation. The present essay is an analysis of books 11 and 111 of Plato's Republic, where al1 the elements to understand the topic of tradition in the Greek world are to be found: the link between poetry and mithology, the nature of the oral mentality, the activity of poets and storytellers, the relationship between orality and literacy, and the power of tradition as a continuity element in the Greek culture.La tradición como concepto en el que se plantean los problemas fundamentales de la memoria oral colectiva es una creación griega. Este ensayo es un análisis de los libros 11 y 111 de la República de Platón, en donde están dados todos los elementos para comprender el tema de la tradición en el mundo griego: el vínculo entre poesía y mitología, el carácter de la mentalidad oral, la actividad de poetas y mitólogos, la relación entre oralidad y escritura, y la fuerza de la tradición como elemento de continuidad en la cultura griega

Relación entre la edad de debut sexual y el sexo bajo los efectos de las drogas en la adolescencia

El debut sexual temprano y la práctica de sexo asociada al consumo de drogas incrementan el riesgo de contraer infecciones de transmisión sexual y embarazos no deseados. No existen datos hasta el momento sobre cómo se relacionan entre sí ambos factores de riesgo. El objetivo de este estudio es analizar la relación entre el uso de drogas asociado a la actividad sexual y la edad de debut sexual en jóvenes. Participaron 351 estudiantes españoles sexualmente activos con una edad media de 15,9 años (DT = 0,75; rango: 14-18), de los que el 55% eran chicas y el 45% eran chicos. Se evaluó la actividad sexual (activo o no activo) y la práctica de relaciones sexuales bajo los efectos de las drogas. Se establecieron tres grupos empleando como criterio la edad media de debut sexual: debut sexual temprano (anterior a los 15 años), promedio (15 años) y tardío (posterior a los 15 años). Los jóvenes que debutaron sexualmente antes de los 15 años habían combinado en mayor proporción sexo y alcohol respecto al resto. No hubo diferencias en el uso de otras drogas combinado con sexo entre los tres grupos. Los análisis de regresión mostraron que la edad de la primera experiencia sexual es un factor predictor de las prácticas sexuales bajo los efectos de las drogas. Debutar sexualmente antes de los 15 se asoció con una mayor probabilidad de mantener relaciones sexuales bajo los efectos de las drogas. Se recomienda un abordaje conjunto de ambas problemáticas a edades tempranas.An early sexual debut and practice of sex associated with drug use have been shown to increase the risk of sexual transmitted infections and unwanted pregnancies. So far there has been no data on how both risk factors are related with each other. The aim of this study is to analyze the relationship between drug use associated with sexual activity and age of sexual debut among young people. Participants were 351 Spanish students who reported being sexually active. The mean age was 15.9 years (SD = 0.75, range: 14-18), 55% girls and 45% boys. We assessed sexual activity (active or non-active) and having had sex under the infl uence of drugs. Three groups were established using as criteria the average age of fi rst sexual relations: early sexual debut (earlier than 15), average (15) and late (later than 15). A higher proportion of young people who began having sex before age 15 had combined sex and alcohol in comparison to the rest. There were no differences in the use of other drugs combined with sex among the three groups. Regression analyzes showed that age of fi rst sexual experience is a predictor of unsafe sex under the infl uence of drugs. Sexual debut earlier than 15 was associated with increased likelihood of having sex under the infl uence of drugs. We recommend a combined approach to both problems at an early age

Influence of design parameters in the optimization of linear switched reluctance motor under thermal constraints

The objective of this paper is to present an original study for optimizing the size of the LongitudinalFlux Double-Sided Linear Switched Reluctance Motor (LSRM) under thermal and weight constraints. The performance is evaluated taken into account duty cycle operating conditions and thermal restrictions. The proposed approach couples Finite Element Analysis for magnetic propulsion force computation and Lumped Parameter Thermal Network for thermal transient analysis. The LSRMs design parameters are characterized by the number of phases and by their size denoted by the pole stroke. The operating conditions are the current density, the duty cycle and the admissible temperature rise of the insulation system. The grid search algorithm is used for solving the optimization problem. From the results, with the help of a novel multivariable optimization chart, a set of optimal configurations regarding to miniaturizations and downsizing of LSRMs is provided.Peer ReviewedPreprin

Thermal performance analysis of the double sided-linear switched reluctance motor

This paper presents an exhaustive study about the propulsion force and the thermal performance of the double-sided flat Linear Switched Reluctance Motor (LSRM) according to the number of phases (m) and the pole stroke (PS). The analysis is performed by means of the Finite Element Method (FEM) for electromagnetic computations and a lumped parameter for thermal model (LPT) both linked to an optimization algorithm based on the Response Surface Methodology (RSM) in order to reduce the computing time. The results show the optimal design of LSRM from the point of view of the thermo-mechanical performance for a given insulation class and a duty cycle operating conditions

Autoconcepto, ansiedad social y sintomatología depresiva en adolescentes españoles según su orientación sexual

Non-heterosexual adolescents are at risk for developing emotional problems because of social stigma and adaptation difficulties. In Spain there are hardly any data on the state of this population during adolescence. The objective of this study was to ex- amine differences in self-concept, depressive symptoms and social anxiety in adolescents based on their sexual orientation. Participants were 832 adolescents aged between 14 and 18, who reported their sexual orientation and completed the Beck Depression Inventory (BDI), the Social Anxiety Scale for Adolescents (SAS-A) and the Marsh Self-Description Questionnaire- abbreviated version (SDQII-S). Comparisons were made between two groups: heterosexuals (n = 60) and non-heterosexuals (n = 56). Non- heterosexual adolescents had higher depressive symptoms, better self-concept in physical ability and lower in honesty. There were no differences in social anxiety between groups. This study shows that ado- lescents’ sexual orientation is related to their self- concept and mood but not anxiety in social relationships. These data are useful to prevent and address early potential emotional problems in adolescents related to their sexual orientation