260 research outputs found
FILOU oscillation code
The present paper provides a description of the oscillation code FILOU, its
main features, type of applications it can be used for, and some representative
solutions. The code is actively involved in CoRoT/ESTA exercises (this volume)
for the preparation for the proper interpretation of space data from the CoRoT
mission. Although CoRoT/ESTA exercises have been limited to the oscillations
computations for non-rotating models, the main characteristic of FILOU is,
however, the computation of radial and non-radial oscillation frequencies in
presence of rotation. In particular, FILOU calculates (in a perturbative
approach) adiabatic oscillation frequencies corrected for the effects of
rotation (up to the second order in the rotation rate) including near
degeneracy effects. Furthermore, FILOU works with either a uniform rotation or
a radial differential rotation profile (shellular rotation), feature which
makes the code singular in the field.Comment: 6 pages, 5 figures. Astrophysics and Space Science (in press
El debate en torno a la utilización de la cámara oculta como técnica de investigación periodística
En este artículo se analiza desde una triple perspectiva la legitimidad del uso de la cámara oculta en la investigación periodística: el derecho, la deontología profesional y las consideraciones de los periodistas ante los dilemas surgidos en el ejercicio profesional. Las conclusiones obtenidas en cada una de estas esferas son complementarias, y proporcionan criterios más concretos y próximos para resolver situaciones excepcionales en las que el periodista se debate entre el derecho a la información de los ciudadanos y el respeto a la ley y la deontología profesiona
Pullback permanence in a non-autonomous competitive Lotka–Volterra model
AbstractThe goal of this work is to study in some detail the asymptotic behaviour of a non-autonomous Lotka–Volterra model, both in the conventional sense (as t→∞) and in the “pullback” sense (starting a fixed initial condition further and further back in time). The non-autonomous terms in our model are chosen such that one species will eventually die out, ruling out any conventional type of permanence. In contrast, we introduce the notion of “pullback permanence” and show that this property is enjoyed by our model. This is not just a mathematical artifice, but rather shows that if we come across an ecology that has been evolving for a very long time we still expect that both species are represented (and their numbers are bounded below), even if the final fate of one of them is less happy. The main tools in the paper are the theory of attractors for non-autonomous differential equations, the sub-supersolution method and the spectral theory for linear elliptic equations
Local climate determines intra- and interspecific variation in sexual size dimorphism in mountain grasshopper communities
The climate is often evoked to explain broad-scale clines of body size, yet its involvement in the processes that generate size inequality in the two sexes (sexual size dimorphism) remains elusive. Here, we analyse climatic clines of sexual size dimorphism along a wide elevation gradient (i) among grasshopper species in a phylogenetically controlled scenario and (ii) within species differing in distribution and cold tolerance, to highlight patterns generated at different time scales, mainly evolutionary (among species or higher taxa) and ontogenetic or microevolutionary (within species). At the interspecific level, grasshoppers were slightly smaller and less dimorphic at high elevations. These clines were associated with gradients of precipitation and sun exposure, which are likely indicators of other factors that directly exert selective pressures, such as resource availability and conditions for effective thermoregulation. Within species, we found a positive effect of temperature and a negative effect of elevation on body size, especially on condition-dependent measures of body size (total body length rather than hind femur length) and in species inhabiting the highest elevations. In spite of a certain degree of species-specific variation, females tended to adjust their body size more often than males, suggesting that body size in females can evolve faster among species and can be more plastic or dependent on nutritional conditions within species living in adverse climates. Natural selection on female body size may therefore prevail over sexual selection on male body size in alpine environments, and abiotic factors may trigger consistent phenotypic patterns across taxonomic scales.Funding was
partially provided by the Spanish Ministries of Science and Innovation (grants CGL2008-02749,
CGL2009-11302 and CGL2011-28177) and Agriculture and Environment (grant 375/2011). J.C. Illera was supported by a Ramón y Cajal postdoctoral fellowship.Peer reviewe
The Spanish version of the believability of anxious feelings and Thoughts Questionnaire
Background: Cognitive fusion is suggested to play an important role in the etiology and maintenance of anxiety disorders according to Acceptance and Commitment Therapy. This study presents the psychometric data of the Spanish version of a cognitive fusion measure in the context of anxiety: the Believability of Anxious Feelings and Thoughts Questionnaire (BAFT). Method: First, we back-translated the BAFT into Spanish and then, administered it to three samples, with a total of 598 participants, in addition to other relevant anxiety measures. Results: Data were very similar to those obtained with the original BAFT version. The BAFT showed a very good internal consistency (overall a= .92) and a hierarchical factor structure with two lower-order factors and one hierarchical factor. Participants showing mild levels of anxiety symptoms scored higher on the BAFT than participants who scored below the cutoffs. BAFT scores were significantly related to anxiety symptoms and to measures of psychological inflexibility, anxiety sensitivity, and mindfulness facets. Moreover, the BAFT showed incremental validity relative to anxiety sensitivity. Conclusions: This Spanish version of the BAFT emerges as a reliable and valid measure of cognitive fusion with anxious thoughts and feelings.
Versión española del Cuestionario de Credibilidad de Sentimientos y Pensamientos Ansiógenos. Antecedentes: la fusión cognitiva juega un papel importante en la etiología y mantenimiento de los trastornos de ansiedad según la Terapia de Aceptación y Compromiso. Este estudio presenta datos psicométricos de la versión española del Cuestionario de Credibilidad de Sentimientos y Pensamientos Ansiógenos (BAFT). Método: se realizó una traducción inversa del BAFT al español y se administró a tres muestras, con un total de 598 participantes, conjuntamente con otras medidas de ansiedad. Resultados: los datos fueron muy similares a los obtenidos en la versión original del BAFT. El BAFT mostró una muy buena consistencia interna (alfa promedio de .92) y una estructura jerárquica con dos factores de primer orden y un factor de segundo orden. Los participantes con niveles moderados de ansiedad puntuaron más en el BAFT que los participantes que mostraron puntuaciones inferiores. Las puntuaciones en el BAFT correlacionaron significativamente con variedad de síntomas de ansiedad y con medidas de inflexibilidad psicológica, sensibilidad a la ansiedad y facetas de mindfulness. El BAFT mostró validez incremental en relación a la sensibilidad a la ansiedad. Conclusiones: la versión española del BAFT emerge como una medida fiable y válida de fusión cognitiva con pensamientos y sentimientos ansiógenos
La Comisión de Deontología como referente de la autorregulación del periodismo: apuntes doctrinales sobre el periodismo digital
En este artículo se presentan los resultados de un estudio sobre la Comisión de Deontología del Periodismo de la FAPE, como instancia de la autorregulación del periodismo en España. El propósito del presente trabajo se cifra en realizar un balance de sus actividades durante su primera década de existencia. Por otro lado, se lleva a cabo un análisis de su doctrina sobre el periodismo online, para analizar si desde los principios éticos convencionales se alcanza a dar respuesta a los dilemas éticos. Se demostrará que los principios éticos del periodismo son los mismos pero la conveniencia de concretar pautas deontológicas más ajustadas a los desafíos digitales contribuiría a esclarecer las responsabilidades del periodista profesional en un entorno de gran confusión comunicativa
Wire Arc Additive Manufacturing of Mn4Ni2CrMo Steel: Comparison of Mechanical and Metallographic Properties of PAW and GMAW
Wire arc additive manufacturing, WAAM, is a popular wire-feed additive manufacturing technology that creates components through the deposition of material layer-by-layer. WAAM has become a promising alternative to conventional machining due to its high deposition rate, environmental friendliness and cost competitiveness. In this research work, a comparison is made between two different WAAM technologies, GMAW (gas metal arc welding) and PAW (plasma arc welding). Comparative between processes is centered in the main variations while manufacturing Mn4Ni2CrMo steel walls concerning geometry and process parameters maintaining the same deposition ratio as well as the mechanical and metallographic properties obtained in the walls with both processes, in which the applied energy is significantly different. This study shows that acceptable mechanical characteristics are obtained in both processes compared to the corresponding forging standard for the tested material, values are 23% higher for UTS and 56% for elongation in vertical direction in the PAW process compared to GMAW (no differences in UTS and elongation results for horizontal direction and in Charpy for both directions) and without significant directional effects of the additive manufacturing technology used.This research was funded by BASQUE GOVERNMENT, grant number KK-2018/00115 (ADDISEND, ELKARTEK 2018 programme) and grant number ZE-2017/00038 (HARITIVE, HAZITEK 2017 programme)
Accountability of the media as seen by Spanish citizens
This article analyses the opinions of citizens on the core values of the so-called Media accountability: truthfulness, independence, transparency, public participation and respect for peoples’ rights. It also analyses citizens’ perceptions of various deontological instruments to measure the effectiveness of compliance with these ethical values. The qualitative methodology used to carry out this analysis is part of the R+D+I research project “Accountability and Journalistic Cultures project in Spain. Impact and proposal of good practices in the Spanish media” (MediaACES), which has been achieved through six focus groups in different Spanish cities. The results of the analysis reflect the critical spirit of citizens towards the media due to the following factors: the absence of objectivity, the mixture of economic interests with their editorial line and an ambiguous participation of the public, which requires a better definition of their role within the information process. The conclusions derived from this analysis allow us to reflect on several aspects: among others, the competition in a deregulated market leads to infotainment and affects the quality of information, as well as the rights of people affected by the news. At the same time, the excess of information channels leads to greater disinformation, under the appearance of a spontaneous pluralism that is superfluous. Ethics, therefore, seems to be a necessary requirement to differentiate professional journalism from other inappropriate information channels and to guarantee the right to information of citizens.El presente artículo analiza las opiniones de los ciudadanos sobre los valores centrales de la denominada Media Accountability: veracidad, independencia, transparencia, participación del público y respeto a los derechos de las personas. Asimismo, se estudia la percepción de la ciudadanía hacia diversos instrumentos deontológicos para medir la eficacia del cumplimiento de dichos valores éticos. La metodología cualitativa empleada para realizar este análisis, enmarcado en el proyecto I+D+i “Accountability y Culturas Periodísticas en España. Impacto y propuesta de buenas prácticas en los medios de comunicación españoles” (MediaACES), se ha concretado mediante la realización de seis grupos de discusión (focus groups) en diversas ciudades del territorio español. Los resultados reflejan el espíritu crítico de la ciudadanía hacia los medios de comunicación por los siguientes factores: la ausencia de objetividad, la mezcla de intereses económicos con su línea editorial y una ambigua participación del público, que exige definir mejor su rol dentro del proceso informativo. Las conclusiones permiten reflexionar sobre diversos aspectos, entre otros, que la competencia en un mercado desregularizado conduce al infoespectáculo y afecta a la calidad informativa y los derechos de las personas afectadas por las noticias. Asimismo, el exceso de canales de información conduce a una mayor desinformación, bajo la apariencia de un pluralismo espontáneo que resulta superfluo. La ética, por tanto, se antoja como una exigencia necesaria para distinguir el periodismo profesional de otras opciones informativas impropias y garantizar el derecho a la información de los ciudadanos
Predictive Psychosocial Factors of Child-to-Parent Violence in a Sample of Mexican Adolescents
The aim of this study was to carry out a psychosocial analysis of child-to-parent violence (CPV) in a sample of school adolescents, considering a set of individual variables (psychological distress, problematic use of social networking sites, and perceived non-conformist social reputation) and family variables (open and problematic communication with parents) according to sex. The sample consisted of 3, 731 adolescents (54% boys), aged between 14 and 16 years (M = 14.6 years, SD = 0.567), from the state of Nuevo León, Mexico. The scores of the boys and girls were analyzed to check for differences. Also, correlations between all the study variables were calculated. Finally, a multiple stepwise regression analysis was carried out for the total sample and also for boys and girls separately. Results confirmed the important role of individual variables as predictors of CPV in boys and girls. The main difference between boys and girls was observed in the predictive weight of problematic use of social networking sites, which was higher in girls than in boys. Open communication with the father was a significant factor for predicting the decrease of CPV levels in the case of boys, while open communication with the mother predicted the decrease of CPV in girls. Problematic communication with the mother showed similar values in boys and girls when predicting CPV, however, the predictive weight of problematic communication with the father was higher in girls than in boys. These results are interesting and have important implications for the prevention of CPV
- …