Towards a new generation of solar cells: silicon supersaturated with titanium or vanadium

We have analyzed the spectral sub-bandgap photoresponse of silicon (Si) samples implanted with vanadium (V) and titanium (Ti) at different doses and subsequently processed by pulsed-laser melting.

Intermediate band solar cells. The transition metal supersaturated Silicon approach

Within the framework of the third solar cell generation some new ideas to enlarge the spectral response of the solar cells toward the infrared have been proposed. Among them the inclusion of an Intermediate Band (IB) seems to be very promising. This paper will deal with one of the ways to generate the IB namely the deep level center approach. We will discuss not only its existence but also the carriers lifetime recovery which is necessary to obtain the expected increase of the solar cell efficiency.

Discursos pronunciados ... en las sesiones celebradas en el congreso de los diputados los dias 3 y 6 de noviembre de 1871, sobre la interpelacion relativa a la Sociedad Internacional.

Mode of access: Internet.

Asociación Latinoamericana y del Caribe en Economía Agrícola, V Congreso Internacional, “La transformación de la empresa en la agricultura”

Introducción Los trabajos se focalizaron en los problemas medulares de la agricultura, aspectos en lso cuales las relaciones entre la agricultura, economía y comercio internacional son fundamentales. Se desprende de las presentaciones que los desafíos de construir una nueva base institucional para apoyar el proceso de transformación  de la agricultura son demasiado evidentes como para continuar relegados; esa construcción se hace aun más necesaria cuando se plantea la importancia de incorporar en los procesos productivos las exigencias de carácter ambiental para generar productos más limpios y fortalecer la capacidad competitiva en los mercados internacionales y el los latinoamericanos y caribeños.

Identidad cultural latinoamericana: una reflexión impostergable

En este artículo se busca exponer sobre las categorías que han permitido reconocer nuestro entorno social y cultural durante los dos últimos siglos. Se identificarán las fuentes de aquellas categorías que nos han permitido reconocer el entorno socio cultural en América Latina y que, asociadas a distintas posiciones epistemológicas, han nutrido la comprensión científico social latinoamericana para definir prácticas sociales que han estado íntimamente relacionadas con el problema del poder en Nuestra América.

La paz como un signo de estos tiempos : la Iglesia latinoamericana ante la violencia y el aporte de las mujeres a la paz

Resumen: Esta ponencia forma parte del primer Panel Inaugural del II Congreso de Teólogas latinoamericanas y alemanas “Espacios de Paz”, realizado del 28 al 31 de marzo de 2016. Se aborda el tema de la paz como signo de estos tiempos desde tres claves: el contexto latinoamericano, la centralidad de la violencia en los estudios sobre la paz y su relación con las mujeres como constructoras de paz y víctimas de violencia. La reflexión se organiza en dos partes: primero, se analiza el discernimiento teológicopastoral sobre la paz realizado por la Conferencia de Medellín, en un contexto de subdesarrollo e injusticia caracterizados como violencia institucional y pecado estructural; además, se mencionan en forma breve los desafíos de reconciliación que plantearon los procesos de transición que siguieron a los gobiernos militares y a los conflictos armados internos. En la segunda parte, se enfocan algunos valores y esferas de la paz y la violencia –personal, estructural y cultural–, para considerar el concepto secular y cristiano de “pacificación” (peacebuilding) y los aportes teóricos y prácticos de las mujeres en la construcción de la paz en contextos de violencia.

Art, adolescence and Social Work: Anja, the invisible manager

This article has been written with the intention of being able to analyse the contributions of art —theatre, in this case— to the practice of social work. For this purpose, we have chosen to read the social reality in which we intervene through the lens of social constructionism. This helps us to rescue the social and subjective side of art, and, moreover, to recover the depathologization of the subject in professional intervention. Thus, using a practical case taken from work with adolescents in the German FSJ programme, hand-in-hand with a young girl called Anja we trace the developmental and sociological aspects of adolescence in order to later address certain common points of art and psychosocial work. Art will hence be redefined as a transitional object allowing questions to be addressed relating to (self-) perception, attachment, communication and changes in conduct as the ultimate goal of professional action. Lastly, we note the limitations and risks of art-based intervention, in order to conclude with a final synopsis.

Welfare Regimes and “progressive” governments in Latin America: The cases of Venezuela, Ecuador and Bolivia

Several authors have applied the concept of Welfare Regimens for studying social policy in Latin America (Esping-Andersen, 1993 and 2000). Among others, Martínez Franzoni (2007) develops a typology, with fi eld work is at the turn of the millennium, and establishes three categories: State-productivist regime, state-protectionist and family orientated. Most countries in the region are placed in the latter category. The hypothesis of this article argues that with the emergence of governments considered “left” or “progressive” in several countries of the region from the late ‘90s and, more decisively, in 2000’, the map of welfare regimes models could have mutated substantively. The nationally transformative experiences are different (various socio-economic realities and political action in which they are located exists) but they have several contact points that can be summarized in a greater state intervention in different areas previously closed to their operating and recovery of important functions of welfare and care of the population by the government. The paper discusses with an exploratory and descriptive approach the welfare schemes that would shape in three countries that have constitutionalized the change from the neoliberal paradigm: Venezuela, Bolivia and Ecuador.

Students with disabilities in a Chilean university

The purpose of this article is to give a report about a research related with the conditions of inclusion of students with disability in a Chilean university. This research is a quantitative, descriptive and cross-sectional study. To collect the data required, a survey was developed, which was applied to 38 students with disability. The main results reveal a high retention rate of students, who exhibit a positive perception of their inclusion in their university life and also a high level of satisfaction with most of the services provided. Seven out of ten students surveyed recognize having received some sort of education care from their programs to pursue their studies. However, there still exists a lack of connection between the current initiatives developed at the university to support the enrollment and permanence of students. Added to this fact, there is a lack of protocols and training for teachers and staff. In this study it is proposed that the university must establish a management system that defines objectives, strategies and actions that contribute to improve inclusion of people with disabilities.

Are they adicctied to college students social networks?

The development of the Internet and in particular of social networks has supposedly given a new view to the different aspects that surround human behavior. It includes those associated with addictions, but specifically the ones that have to do with technologies. Following a correlational descriptive design we present the results of a study, which involved university students from Social and Legal Sciences as participants, about their addiction to the Internet and in particular to social networks. The sample was conformed of 373 participants from the cities of Granada, Sevilla, Málaga, and Córdoba. To gather the data a questionnaire that was design by Young was translated to Spanish. The main research objective was to determine if university students could be considered social network addicts. The most prominent result was that the participants don’t consider themselves to be addicted to the Internet or to social networks; in particular women reflected a major distance from the social networks. It’s important to know that the results differ from those found in the literature review, which opens the question, are the participants in a phase of denial towards the addiction?

La narrativa indigenista en Argentina. Una doble denuncia

Desde tiempos de José Carlos Mariátegui, la crítica literaria indigenista viene articulando un discurso etnocentrista cuyo eje de producción se sitúa en Perú y los países vecinos, pero rara vez se ha mencionado una obra argentina que trate sobre las desigualdades que sufren los indígenas de ese país. Ni siquiera la academia argentina ha analizado ninguna novela desde la óptica indigenista.En un país cuyos gobiernos, desde el siglo XIX, han tratado de borrar cualquier traza de sangre indígena en su población, ya sea mediante la asimilación, exterminio o invisibilidad, y cuyas zonas de mayor asentamiento indígena se encuentran lejos del hegemónico Buenos Aires, las narraciones de problemas sociales ajenos quedaban encajonadas en el recóndito mundo de la literatura regional.Sin embargo, durante los años de eclosión del movimiento indigenista, escritores argentinos se hicieron eco de los sufrimientos y demandas de sus compatriotas indígenas por medio de novelas que sobrepasaron el peyorativo epíteto regionalista y que incomprensiblemente, han sido olvidadas.En este artículo, que forma parte de un estudio más amplio, se aborda el silencio crítico, se contextualiza la producción indigenista de la época y se analizan brevemente algunas de las obras.