Nexos entre tecnología y filosofía: el caso específico del ecosistema del metaverso

El desarrollo de la tecnología y de la inteligencia artificial provocan desde hace años preguntas éticas y antropológicas. La Suma Teológica de Santo Tomás permite categorizar términos tecnológicos y establecer ontologías en clave filosófica. Con esta metodología de la Suma se va a estudiar aquí el término “metaverso” y sus implicaciones éticas. El artículo aporta además una revisión sistemática de literatura científica para elaborar un mapa de conocimiento desde un punto de vista cualitativo y cuantitativo que visibilice el impacto de esta terminología emergente en la investigaciónpost-print702 K

Time- and spatially-resolved magnetization dynamics driven by spin-orbit torques

Current-induced spin-orbit torques (SOTs) represent one of the most effective ways to manipulate the magnetization in spintronic devices. The orthogonal torque-magnetization geometry, the strong damping, and the large domain wall velocities inherent to materials with strong spin-orbit coupling make SOTs especially appealing for fast switching applications in nonvolatile memory and logic units. So far, however, the timescale and evolution of the magnetization during the switching process have remained undetected. Here, we report the direct observation of SOT-driven magnetization dynamics in Pt/Co/AlO$_x$ dots during current pulse injection. Time-resolved x-ray images with 25 nm spatial and 100 ps temporal resolution reveal that switching is achieved within the duration of a sub-ns current pulse by the fast nucleation of an inverted domain at the edge of the dot and propagation of a tilted domain wall across the dot. The nucleation point is deterministic and alternates between the four dot quadrants depending on the sign of the magnetization, current, and external field. Our measurements reveal how the magnetic symmetry is broken by the concerted action of both damping-like and field-like SOT and show that reproducible switching events can be obtained for over $10^{12}$ reversal cycles

Time- and spatially-resolved magnetization dynamics driven by spin-orbit torques

Current-induced spin-orbit torques (SOTs) represent one of the most effective ways to manipulate the magnetization in spintronic devices. The orthogonal torque-magnetization geometry, the strong damping, and the large domain wall velocities inherent to materials with strong spin-orbit coupling make SOTs especially appealing for fast switching applications in nonvolatile memory and logic units. So far, however, the timescale and evolution of the magnetization during the switching process have remained undetected. Here, we report the direct observation of SOT-driven magnetization dynamics in Pt/Co/AlO$_x$ dots during current pulse injection. Time-resolved x-ray images with 25 nm spatial and 100 ps temporal resolution reveal that switching is achieved within the duration of a sub-ns current pulse by the fast nucleation of an inverted domain at the edge of the dot and propagation of a tilted domain wall across the dot. The nucleation point is deterministic and alternates between the four dot quadrants depending on the sign of the magnetization, current, and external field. Our measurements reveal how the magnetic symmetry is broken by the concerted action of both damping-like and field-like SOT and show that reproducible switching events can be obtained for over $10^{12}$ reversal cycles

La construcción del análisis de la propia práctica en un espacio de formación inicial del Profesorado de Matemática

En esta comunicación compartimos una experiencia llevada adelante en el marco de la asignatura Didáctica Específica II y Prácticas Docentes en Matemática del Profesorado de Matemática de la Universidad Nacional de La Plata, durante el primer cuatrimestre de 2017. Una de las intenciones de la propuesta de trabajo de la cátedra es construir junto con los futuros egresados maneras de mirar las escenas de aula –propias y de otros- a partir de dimensiones matemático-didácticas que se van construyendo conjuntamente a lo largo de las clases. A su vez, lo que los estudiantes van recogiendo y documentando en sus experiencias en las instituciones escolares enriquecen, problematizan, tensionan y permiten complejizar lo que estudiamos en las clases. En este trabajo presentamos el desarrollo de una actividad que propusimos con la intención antes mencionada, y analizamos lo vivido particularmente por una de las estudiantes.Facultad de Humanidades y Ciencias de la Educació

La construcción del análisis de la propia práctica en un espacio de formación inicial del Profesorado de Matemática

En esta comunicación compartimos una experiencia llevada adelante en el marco de la asignatura Didáctica Específica II y Prácticas Docentes en Matemática del Profesorado de Matemática de la Universidad Nacional de La Plata, durante el primer cuatrimestre de 2017. Una de las intenciones de la propuesta de trabajo de la cátedra es construir junto con los futuros egresados maneras de mirar las escenas de aula –propias y de otros- a partir de dimensiones matemático-didácticas que se van construyendo conjuntamente a lo largo de las clases. A su vez, lo que los estudiantes van recogiendo y documentando en sus experiencias en las instituciones escolares enriquecen, problematizan, tensionan y permiten complejizar lo que estudiamos en las clases. En este trabajo presentamos el desarrollo de una actividad que propusimos con la intención antes mencionada, y analizamos lo vivido particularmente por una de las estudiantes.Facultad de Humanidades y Ciencias de la Educació

La construcción del análisis de la propia práctica en un espacio de formación inicial del Profesorado de Matemática

En esta comunicación compartimos una experiencia llevada adelante en el marco de la asignatura Didáctica Específica II y Prácticas Docentes en Matemática del Profesorado de Matemática de la Universidad Nacional de La Plata, durante el primer cuatrimestre de 2017. Una de las intenciones de la propuesta de trabajo de la cátedra es construir junto con los futuros egresados maneras de mirar las escenas de aula –propias y de otros- a partir de dimensiones matemático-didácticas que se van construyendo conjuntamente a lo largo de las clases. A su vez, lo que los estudiantes van recogiendo y documentando en sus experiencias en las instituciones escolares enriquecen, problematizan, tensionan y permiten complejizar lo que estudiamos en las clases. En este trabajo presentamos el desarrollo de una actividad que propusimos con la intención antes mencionada, y analizamos lo vivido particularmente por una de las estudiantes.Facultad de Humanidades y Ciencias de la Educació

Figurations of displacement in southern Europe: empirical findings and reflections on protracted displacement and translocal networks of forced migrants in Greece and Italy

This working paper is based on empirical research on the Translocal Figurations of Displacement in Greece and Italy. The authors aim to compare protracted displacement in Greece and Italy, looking at the structural forces shaping it and their interactions with migrants' mobility and connectivity. This comparison is based on the analysis of the relations between two contextual variables (governance regimes and host population) and three key variables (mobility, connectivity and marginalisation). In this paper, they present findings from three study sites in Greece and four research locations in Italy. Findings show that protracted legal and socio-economic marginalisation is a key feature characterising the lives of displaced people in southern European countries. It confirms the hypothesis that protracted displacement does not end when forced migrants reach Greece or Italy. Restrictive governance regimes at the national and EU level severely limit mobility opportunities within Greece and Italy and across the European Union (EU). To cope with and resist marginalising and immobilising policies, displaced migrants in Italy and Greece put in place several strategies, ranging from adapting to governance regimes and taking the most out of them to resisting them and finding ways to avoid, bypass or overcome such regimes. In this framework, mobility and connectivity emerge as a resource and a trap for displaced migrants in southern Europe. On the one hand, migrants' strategies of intra-national and intra-EU mobility may help them out of protracted displacement, while on the other, certain types of mobility (hyper-, circular, paradoxical) can entrap, rather than free them. Similarly, local, translocal and transnational networks emerge as a crucial resource for displaced people in Greece and Italy. At the same time, family and co-ethnic networks may also be experienced as disabling, hampering one's aspirations to get out of protracted displacement. Fieldwork in both countries highlighted common factors shaping the relationships between displaced migrants and host communities. We also observed different facets of intergroup relations, ranging from indifference to friendship. The paper concludes by highlighting similarities and differences on the findings from both countries, based on qualitative and quantitative data

The Q-LAMP Method Represents a Valid and Rapid Alternative for the Detection of the BCR-ABL1 Rearrangement in Philadelphia-Positive Leukemias

Molecular detection of the BCR-ABL1 fusion transcripts is necessary for the genetic confirmation of a chronic myeloid leukemia diagnosis and for the risk classification of acute lymphoblastic leukemia. BCR-ABL1 mRNAs are usually identified using a conventional RT-PCR technique according to the BIOMED-1 method. In this study, we evaluated 122 BCR-ABL1-positive samples with the Q-LAMP assay to establish if this technology may represent a valid alternative to the qualitative BIOMED-1 PCR technique usually employed for the detection and the discrimination of the common BCR-ABL1 transcripts (p190 and p210 isoforms). We found a 100% concordance rate between the two methods. Specifically, the p190- and p210-positive samples were amplified by Q-LAMP with a median threshold time (Tt) of 26.70 min (range: 24.45-31.80 min) and 20.26 min (range: 15.25-34.57 min), respectively. A median time of 19.63 was observed in samples displaying both (e13a2/e14a2) p210 isoforms. Moreover, the Q-LAMP assay allowed recognition of the BCR-ABL1 e13a2 and e14a2 isoforms (median Tts 18.48 for e13a2 vs. 26.08 min for e14a2; p < 0.001). Finally, 20 samples harboring rare BCR-ABL1 isoforms (e1a3, e13a3, e14a3, and e19a2) were correctly identified by the Q-LAMP assay. We conclude that the Q-LAMP assay may represent a faster and valid alternative to the qualitative BIOMED-1 RT-PCR for the diagnosis at BCR-ABL1-positive leukemias, especially when samples are analyzed in centers with restricted resources and/or limited technical expertise