When is multitask learning effective? Semantic sequence prediction under varying data conditions

Multitask learning has been applied successfully to a range of tasks, mostly morphosyntactic. However, little is known on when MTL works and whether there are data characteristics that help to determine its success. In this paper we evaluate a range of semantic sequence labeling tasks in a MTL setup. We examine different auxiliary tasks, amongst which a novel setup, and correlate their impact to data-dependent conditions. Our results show that MTL is not always effective, significant improvements are obtained only for 1 out of 5 tasks. When successful, auxiliary tasks with compact and more uniform label distributions are preferable.Comment: In EACL 201

Comparing galaxy populations in compact and loose groups of galaxies II: brightest group galaxies

The properties of the brightest galaxies (BCGs) are studied in both compact and loose groups of galaxies in order to better understand the physical mechanisms influencing galaxy evolution in different environments. Samples of BCGs are selected in the compact groups identified by McConnachie et al. (2009), and in loose groups taken from Zandivarez & Mart\'inez (2011). The following physical properties of the BCGs in compact groups and in subsamples of loose groups are compared, defined by their mass and total luminosity. The fraction of BCGs classified as red and/or early-type as a function of galaxy luminosity are studied. The fraction of the group's total luminosity contained in the BCG and the difference in luminosity between the BCG and the second-ranked galaxy, are also analysed. Some properties of BCGs in compact and loose groups are comparable. However, BCGs in compact groups are systematically more concentrated and have larger surface brightness than their counterparts in both, high- and low-mass loose groups. The fractions of red and early-type BCGs in compact groups are consistent with those of high-mass loose groups. Comparing BCGs in subsamples of compact and loose groups selected for their similar luminosities, BCGs in compact groups are found to be, on average, brighter, more massive, larger, redder and more frequently classified as elliptical. In compact groups, the BCG contains a larger fraction of the system's total luminosity and differs more in absolute magnitude from the second-ranked galaxy. BCGs in compact and loose groups are found to be different. Some mechanisms responsible for transforming late-type galaxies into early types, such as mergers, may be more effective within compact groups due to their high densities and small velocity dispersion, which would lead their BCGs along somewhat different evolutionary paths.Comment: Accepted for publication in Astronomy & Astrophysics (A&A

Soldados hispanos en las cohortes urbanas

En este artículo estudiaremos los testimonios epigráficos de soldados hispanos que sirvieron en las cohortes urbanas.In this article we will study epigraphic remains of hispanic soldiers who served in urban cohorts

Las relaciones entre cerebro y conducta: ¿hay posibilidades de comunicación?

La discusión sobre las contribuciones de la neurociencia y en particular de la neurociencia cognitiva para la comprensión del comportamiento animal y humano, sigue siendo un tema en la agenda de la Psicología en general y del análisis experimental de la conducta en particular. El notable incremento en la producción investigadora de la neurociencia en los años recientes ha desplazado el interés por la investigación conductual. Sin embargo, distintos aspectos filosóficos, conceptuales y metodológicos están implicados en esta discusión que marcan las distancias entre ambos dominios, pero paradójicamente a la vez, podrían ser considerados para intentar establecer posibles vías de interacción entre la neurociencia y el análisis de la conducta, si realmente estamos interesados en ganar una comprensión más completa del comportamiento.The discussion on the contributions of neuroscience, and cognitive neuroscience specifically, to the understanding of animal and human behavior remains an issue on the agenda of Psychology in general, and also a particular issue for the experimental behavior analysis. The notable increase in the neuroscience research in recent years has displaced the interest outside behavioral research. However, different philosophical, conceptual and methodological aspects are involved in this discussion, so it marks the distance between both domains. At same time, paradoxically, if we are really interested in acquiring a more complete understanding of behavior, those aspects could be considered to establish possible interactions between neuroscience and behavior analysis

"With American Eyes" and the canvas of "Lazarillo" (An example of creative intertextuality)

Este artículo pretende mostrar las concomitancias de diversa índole entre la novela "Con ojos americanos" y "El Lazarillo de Tormes". Esos puntos de contacto, abundantes, se interpretan como resultado de un ejercicio de intertextualidad creativa. Afectan al punto de vista narrativo, la primera persona, como eje vertebrador de la narración, a la intención satírica y a otros materiales menudos del entramado narrativo. El protorrelato picaresco del "Lazarillo" sería el cañamazo sobre el que se dibuja, compleja y original, una andadura narrativa llena de humor e incitaciones, que provoca la sonrisa y la reflexión.This article shows the concommittances of various sorts between the novel "With American Eyes" and "Lazarillo de Tormes". Such points of contact, abundant, are interpreted as the result of an exercise in creative intertextuality. They concern the narrative point of view, the first person, as the backbone of the narrative, the satirical intention and other tiny materials of the narrative framework. The picaresque “protorrelato” of "Lazarillo" would be the canvas on which it is drawn, complex and original, a narrative journey full of humor and incitements, which brings a smile and reflection.peerReviewe

Espacio Mestizo . Lenguajes artísticos desde la comunidad con menores en riesgo, en los barrios de León

Treballar vincles i educar des de l’acompanyament de processos vitals és clau, en el treball amb persones amb vincles negatius o amb falta de vincles i referents positius, en la seva vida. Poder aparèixer l’educador com una relació significativa i vinculant, amb el problema afegit i clàssic del compromís personal i la transferència i, fins i tot, ingerència en la vida privada. L’aposta educativa des de la Fundación en aquest sentit és molt clara, cal crear, mantenir i desenvolupar el vincle educatiu amb els nostres adolescents.To work bonds and to educate trhough ongoing support in vital processes are key points in the work with people with negative bonds or with lack of bonds and positive references in their life. The relationship with the educator should be considered significant and binding, but with the added and classic problem of personal commitment and transference, and even the interference in private life. The educational stance of the Foundation in this sense is very clear: educational bonds with our adolscents must be created, sustained and developed.Trabajar vínculos y educar desde el acompañamiento de procesos vitales es clave, en el trabajo con personas con vínculos negativos o con falta de vínculos y referentes positivos, en su vida. Poder aparecer el educador como una relación significativa y vinculante, con el problema añadido y clásico del compromiso personal y la transferencia e, incluso, injerencia en la vida privada. La apuesta educativa desde la Fundación en este sentido es muy clara, hay que crear, mantener y desarrollar el vínculo educativo con nuestros adolescentes

Characterization of optical frequency comb bades me asurements and spectral purity transfer for optical atomic clocks

Tesis doctoral inédita cotutelada por l´Université de La Sorbonne y por la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Física de Materiales. Fecha de lectura: 15-03-202