Revistas Científicas de Filo (Facultad de Filosofía y Letras, UBA - Universidad de Buenos Aires)
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Stability analysis for time-dependent nonlinear systems. An interval approach
No full textOne of the most important issues in control is determining the stability of a system. Since the 1960’s, Lyapunov-based methods have been developed to determine the stability of linear and nonlinear systems. However, when the system is nonlinear, time-dependent and uncertain, in a set-membership context, stability analysis is challenging and no reliable methods have been developed. This paper proposes an original set-membership based approach for establishing the stability of non-linear, uncertain, time-dependent systems. Two new concepts G-Stability (which is the stability of nonlinear time-dependent uncertain trajectories) and capture tubes (which is an invariant stability region for time-dependent systems) are introduced and illustrated for an autonomous, uncertain, robotic sailboat. Then, G-Stability is used to formulate and prove the safety for a set of capture tubes. This result is then used to analyse the safety of a squad of uncertain, robotic sailboat moving in their environment (no collision among the robots)
H εκπαίδευση στην κοινωνική εργασία την εποχή της κρίσης στην Ελλάδα: εκπαιδεύοντας το ανθρώπινο δυναμικό να καταπολεμήσει τις ανισότητες
No full textSince 2010, Greece has experienced an unprecedented economic and humanitarian crisis, which continues to have tremendous social impact. Austerity measures and policy cuts have included a dis-investment in social work and social care and more recently the abolition of one of the four national Social Work Departments providing qualifying social work education. In this context, this study addresses the following question: how does pre-qualifying social work education in Greece influence students’ ability to manage value tensions in relation to anti-oppressive practice? Using a case study methodology, the research was based in one Social Work Department (subsequently abolished). Data were collected through semi-structured interviews from social work students at two points in their professional education (n=32) and once from academic staff/placement supervisors (n=10). Data were analysed drawing on grounded theory techniques. In this paper only one particular dataset is considered in detail: the attitudes and experiences of final year students. The main findings indicate students’ narrow understandings and individualistic approaches towards oppression, reflecting an urgent need to redefine social work education and practice in Greece according to current social justice concerns. Specifically, social work education needs to give greater weight to a structural perspective on the dynamics of oppression
Ecologies of educational reflexivity and agency – a different way of thinking about equitable educational policies and practices for England and beyond?
No full textThe current UK education policy for Englandemphasis on equity and social mobility focuses on narrowing the educational attainment gap between more and less advantaged groups of young people – an approach that has strong parallels in many Anglophone countries around the world. We argue that these policy and associated practice proscriptions tend to privilege an individualised narrative of agency for young people, teachers and schools more generally. Our paper argues that this individualised approach is highly problematic in that it decontextualizes the complex and real agentic work of young people in schooling, making it difficult to empirically and theoretically account for differences in educational outcome between and within groups of young people. Informed by a social realist perspective, and in particular the work of Margaret Archer, we propose a theoretical model that we suggest provides greater explanatory and predictive power. The model focuses on the way ecologies of development emerge for young people. We suggest that such ecologies reflect different structural and cultural factors and processes, combining in ways that enable and/or constrain young people’s educational reflexivity and agency and their ensuing educational engagement and attainments. We believe that building a typology of such ecologies of educational reflexivity and agency provides improved ways of developing equitable educational policies and practice - ones that relate clearly to the compositional mix of young people in schools and enable the development of interventions that better relate to such ecologies
Reduction of elementary flux mode complexity enables rational metabolic engineering for biotechnological products
No full textNegociación colectiva en clave de géneros: demandas, estrategias y debates
No full textThe article presents the main trends of gender-terms in sectoral collective bargaining in urban regions of Argentina. It is based on a wide range of data, drawn from the survey of collective strategies and ways of building demands carried out in agreements, semi-structured interviews, and the data produced in workshops attended by activists, militants, and union leaders. Progress will be made in the description of the main areas of demands (wage gap, violence and care) establishing the obstacles, the challenges, as well as the stray collectives of women organized in trade unions.El artículo presenta las principales tendencias que se identifican en materia de negociación colectiva en clave de género en distintos sectores de actividad en regiones urbanas de la Argentina. Se parte de un conjunto amplio de datos construidos a partir del relevamiento de acuerdos y convenios colectivos, de entrevistas semiestructuradas y de la sistematización de lo producido en talleres en donde participaron activistas, militantes y dirigentes sindicales. Se avanzará en la descripción de las áreas de demandas más importantes (brecha salarial, violencia y cuidados) estableciendo los principales obstáculos y desafíos, así como las estrategias y las vías de construcción de demandas que llevan adelante colectivos de mujeres organizadas sindicalmente
Prácticas tecnológicas en las lagunas del centro de los pastizales pampeanos. El caso de Laguna Blanca Chica (cuenca superior del arroyo Tapalqué, Buenos Aires)
No full textThe main goal of this study is to understand the practices and management of technological production of the hunter-gatherer groups that inhabited the Tapalqué creek basin (Olavarría, Buenos Aires). The results of the techno-morphological analysis of the lithic assemblage from the Laguna Blanca Chica site are presented and discussed. Also, the function of a chert accumulation in a shallow lake (possibly a cache or knapping locus) is assessed. The different stages of the operational chains were reconstructed to identify technological practices and recognize the knapping techniques (debitage, façonnage, and retouch) involved in the production processes of the lithic artifacts. The raw material more frequently used is chert, followed by orthoquartzite with a wide range of colors. In smaller proportions, silica, quartz, silicified dolomite, limestone, and granitoid rocks are also present. Results reveal certain differences in the treatment of the main tool stones, which are reflected in varying technological activities and in the modes of tool manufacture. Finally, the technological practices identified at Laguna Blanca Chica are compared with those from other archaeological contexts within the central Pampa grasslandsEste trabajo tiene como principal objetivo conocer las prácticas y gestiones de producción tecnológicas llevadas a cabo por los grupos cazadores-recolectores que habitaron la cuenca del arroyo Tapalqué (partido de Olavarría, Buenos Aires). Con este propósito, se presentan y discuten los resultados obtenidos del análisis tecno-morfológico del conjunto lítico procedente del sitio Laguna Blanca Chica. Para identificar las prácticas tecnológicas y reconocer los modos de talla (debitage, façonnage y retoque) involucrados en las trayectorias de producción de los artefactos líticos se reconstruyeron las diferentes etapas de las cadenas operativas. En líneas generales, la materia prima que se encuentra mayormente representada es la ftanita, seguida por la ortocuarcita con una amplia diversidad de colores y, en proporciones menores, por sílice, cuarzo, dolomía silicificada, caliza y rocas granitoides. Los resultados obtenidos permiten identificar ciertas diferencias en el tratamiento de las principales rocas talladas, lo cual se ve reflejado en las diversas actividades tecnológicas y en los modos de manufactura de los artefactos formatizados. Por último, se discute la funcionalidad de una acumulación de ftanita en la laguna (escondrijo o locus de talla) y se comparan las prácticas tecnológicas identificadas en el sitio Laguna Blanca Chica con otros contextos arqueológicos del centro de los pastizales pampeanos
Diversidad y arte latinoamericano, historias de artistas que rompieron el techo de cristal: Andrea Giunta (2024). Buenos Aires, Siglo XXI. 256 pp.
No full textDiversidad y arte latinoamericano, historias de artistas que rompieron el techo de cristal.
Andrea Giunta (2024). Buenos Aires, Siglo XXI. 256 pp. 
Después de Parir. Una etnografía de la atención médica posparto: Clara Inés Gilligan (2024). Buenos Aires, Imago Mundi. 150 p.
No full textDespués de Parir. Una etnografía de la atención médica posparto
Clara Inés Gilligan (2024). Buenos Aires, Imago Mundi. 150 p
La clase trabajadora en la tormenta del mundo. El movimiento obrero argentino ante la crisis mundial (1929-1933)
No full textIn this article we seek to shift the angle of analysis towards the ways in which Argentine workers, through their union and political organizations, received, processed and offered programmatic responses to the unquestionable opening moment of the turbulent decade of the 1930s: the crash of the New York stock exchange in October 1929. The article is structured in three sections: in the first, we will address the readings that were made about the immediate impact of the crisis in October 1929, its causes and global explanations; in the second, we will focus on the analysis of its consequences, focusing not only on the voices referring to the local repercussions (for example, those related to the problem of unemployment) but also on the global echoes awakened by the crisis; finally, we will focus on the programmatic elaborations that they put forward as a response to the crisis and on the identification of the dense international network that influenced those interpretations and that linked the local labor movement with global structures. This is based on a large and varied body of documentation that includes national newspapers, party documents, and union sources, among others.En este artículo buscamos desplazar el ángulo de análisis hacia los modos en que las y los trabajadores argentinos, mediante sus organizaciones gremiales y políticas, recepcionaron, procesaron y ofrecieron respuestas programáticas ante el indubitable momento inaugural de la convulsionada década de 1930: el crack de la bolsa de Nueva York en octubre del 29. El artículo se estructura en tres apartados: en el primero, abordaremos las lecturas que se realizaron sobre el impacto inmediato de la crisis en octubre de 1929, sus causas y explicaciones globales; en el segundo, nos detendremos sobre los análisis de sus consecuencias, focalizando no solo en las voces referidas a las repercusiones locales (por ejemplo, abocadas al problema de la desocupación) sino a los ecos globales despertados por la crisis; finalmente, haremos foco en las elaboraciones programáticas que esgrimieron como respuesta a la crisis y en la identificación de la densa trama internacional que incidió en aquellas lecturas y que enhebró al movimiento obrero local con estructuras globales. Ello a partir de un nutrido y variado cuerpo documental que incluye periódicos nacionales, documentos partidarios, fuentes de índole gremial, entre otros.