Distance teaching and teaching 'as' distance. A critical reading of online teaching instruments during and after the pandemic

This paper intends to read through a critical lens the digitalization of schooling caused by the COVID-19 epidemic. The emergency has forced European governments to close the schools and consequently, all the schooling activities have been transferred online. Referring to some works of Giorgio Agamben, Paul Virilio and Walter Benjamin the authors propose some critical remarks on the transformation of schooling space and schooling time that characterizes the practice of distance learning. This transformation pertains not only to accidental aspects of schooling but affects the very identity of the schooling experience. In a completely digitalized school, time is characterized by instantaneousness: time as duration is replaced by the "time of exposure", as stated by Paul Virilio. In addition, the school completely dematerialized, is reduced to the two-dimensional space of the screen. The article aims to show that instantaneous time and dematerialized space make the experience of "crossing" difficult. Therefore, following some remarks by Jan Masschelein and Gert Biesta, it is maintained that the experience of "crossing" endangered by the digitalization of schooling is essential to an authentic experience of schooling. It is not intended to refuse the digital innovations as such but to "put them on the table", in order to suspend their immediate use and analyze them critically.Este documento pretende revisar con una visión crítica la digitalización escolar causada por la COVID-19. La emergencia ha forzado a los gobiernos europeos a cerrar los colegios y, como consecuencia, todas las actividades escolares han pasado a ser online. Haciendo referencia a algunos trabajos de Giorgio Agamben, Paul Virilio y Walter Benjamin, los autores proponen algunas observaciones críticas a la transformación del espacio escolar y del tiempo escolar que caracteriza la práctica del aprendizaje a distancia. Esta transformación no solo se refiere a aspectos escolares accidentales, sino que también afecta a la propia identidad de la experiencia escolar. En una escuela completamente digitalizada, el tiempo se caracteriza por su instantaneidad: el tiempo como duración es sustituido por el «tiempo de exposición», como argumentaba Paul Virilio. Además, el colegio completamente desmaterializado se reduce al espacio bidimensional de la pantalla. El artículo tiene por objeto demostrar que el tiempo instantáneo y el espacio desmaterializado dificultan la experiencia de «cruzar». Por tanto, siguiendo algunas observaciones de Jan Masschelein y Gert Biesta, se afirma que la experiencia de «cruzar», amenazada por la digitalización escolar, es esencial para vivir una auténtica experiencia escolar. No se pretenden negar las innovaciones digitales en sí, sino «ponerlas sobre la mesa» para suspender su uso inmediato y analizarlas de manera crítica

Plan de negocios para la organización de una empresa dedicada a la gestión y producción de indumentaria deportiva de clubes a nivel provincial

La empresa que se propone estará dedicada a la gestión y producción de indumentaria deportiva de clubes a nivel provincial. Específicamente, orientada al diseño, producción y venta de indumentaria (fútbol y deportes accesorios). Estará dirigida al mercado de la provincia de Mendoza, se toma como nicho de mercado tanto a los afiliados, como también a todos los prospectos simpatizantes de los clubes locales que se toma como referencia. Se espera una rápida recuperación de las inversiones, permitiendo obtener un margen de ganancia en el corto plazo. Los indicadores de VAN $ 625.414 Y TIR 120%. La propuesta de valor a los clubes locales a través de una estrategia de nicho basada en la diferenciación, permitiendo responder a las necesidades insatisfechas presentadas por la hinchada del club. Se puede concluir que el mismo es factible desde el punto de vista técnico, económico, organizacional y comercial.Fil: Gobbi, Federico Jos

How reliable are Hanle measurements in metals in a three-terminal geometry?

We test the validity of Hanle measurements in three-terminal devices by using aluminum (Al) and gold (Au). The obtained Hanle and inverted Hanle-like curves show an anomalous behavior. First, we measure Hanle signals 8 orders of magnitude larger than those predicted by standard theory. Second, the temperature and voltage dependences of the signal do not match with the tunneling spin polarization of the ferromagnetic contact. Finally, the spin relaxation times obtained with this method are independent of the choice of the metallic channel. These results are not compatible with spin accumulation in the metal. Furthermore, a scaling of the Hanle signal with the interface resistance of the devices suggests that the measured signal is originated in the tunnel junction.Comment: 9 pages, 5 figure

Diagnosis of Malaria Infection with or without Disease

The revised W.H.O. guidelines for malaria management in endemic countries recommend that treatment should be reserved to laboratory confirmed cases, both for adults and children. Currently the most widely used tools are rapid diagnostic tests (RDTs), that are accurate and reliable in diagnosing malaria infection. However, an infection is not necessarily a clinical malaria, and RDTs may give positive results in febrile patients who have another cause of fever. Excessive reliance on RDTs may cause overlooking potentially severe non malarial febrile illnesses (NMFI) in these cases. In countries or areas where transmission intensity remains very high, fever management in children (especially in the rainy season) should probably remain presumptive, as a test-based management may not be safe, nor cost effective. In contrast, in countries with low transmission, including those targeted for malaria elimination, RDTs are a key resource to limit unnecessary antimalarial prescription and to identify pockets of infected individuals. Research should focus on very sensitive tools for infection on one side, and on improved tools for clinical management on the other, including biomarkers of clinical malaria and/or of alternative causes of fever

Room-temperature air-stable spin transport in bathocuproine-based spin valves

Organic semiconductors, characterized by weak spin-scattering mechanisms, are attractive materials for those spintronic applications in which the spin information needs to be retained for long times. Prototypical spin-valve devices employing organic interlayers sandwiched between ferromagnetic materials possess a figure of merit (magnetoresistance (MR)) comparable to their fully inorganic counterparts. However, these results are a matter of debate as the conductivity of the devices does not show the expected temperature dependence. Here we show spin valves with an interlayer of bathocuproine in which the transport takes place unambiguously through the organic layer and where the electron spin coherence is maintained over large distances (>60 nm) at room temperature. Additionally, the devices show excellent air stability, with MR values almost unaltered after 70 days of storage under ambient conditions, making bathocuproine an interesting material for future spintronic applications.Fil: Sun, Xiangnan. CIC nanoGUNE; EspañaFil: Gobbi, Marco. Université de Strasbourg; Francia. CIC nanoGUNE; EspañaFil: Bedoya Pinto, Amilcar. CIC nanoGUNE; EspañaFil: Txoperena, Oihana. CIC nanoGUNE; EspañaFil: Golmar, Federico. CIC nanoGUNE; España. Instituto Nacional de Tecnología Industrial; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Llopis, Roger. CIC nanoGUNE; EspañaFil: Chuvilin, Andrey. CIC nanoGUNE; España. Fundación Vasca para la Ciencia; EspañaFil: Casanova, Félix. CIC nanoGUNE; España. Fundación Vasca para la Ciencia; EspañaFil: Hueso, Luis E.. CIC nanoGUNE; España. Fundación Vasca para la Ciencia; Españ

Room-Temperature Spin Transport in C60-Based Spin Valves

Carbon-based spin valves, composed of a C60 layer sandwiched between two magnetic materials show room temperature spin transport for a fullerene thickness up to 30 nm. This result, interpreted by a multistep tunnelling transport model, represents an advance in the field of carbon spintronics.Fil: Gobbi, Marco. CIC nanoGUNE Consolider; EspañaFil: Golmar, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Industrial; Argentina. CIC nanoGUNE Consolider; EspañaFil: Llopis, Roger. CIC nanoGUNE Consolider; EspañaFil: F. Casanova. CIC nanoGUNE Consolider; España. Basque Foundation for Science; EspañaFil: Hueso, Luis E.. CIC nanoGUNE Consolider; España. Basque Foundation for Science; Españ

C60-based hot-electron magnetic tunnel transistor

A C 60-based magnetic tunnel transistor is presented. The device is based on the collection of spin-filtered hot-electrons at a metal/C 60 interface, and it allows an accurate measurement of the energy level alignment at such interface. A 89% change in the collected current under the application of a magnetic field demonstrates that these devices can be used as sensitive magnetic field sensors compatible with soft electronics.Fil: Gobbi, M.. No especifíca;Fil: Bedoya Pinto, A.. No especifíca;Fil: Golmar, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Llopis, R.. No especifíca;Fil: Casanova, F.. No especifíca;Fil: Hueso, L. E.. No especifíca

Ultrasound and intestinal lesions in Schistosoma mansoni infection: A case-control pilot study outside endemic areas

Infection with Schistosoma mansoni is a major cause of morbidity and mortality in endemic areas, and is increasingly diagnosed in migrants and travellers outside transmission areas. Markers for the assessment of morbidity and impact of control programs in endemic areas and for the clinical management of patients in the clinical setting are scant, especially for intestinal involvement. Ultrasonography is well established to evaluate hepatosplenic pathology; on the contrary, ultrasound evaluation of intestinal schistosomiasis is virtually unexplored. In this pilot study, we aimed to describe and evaluate the accuracy of unenhanced intestinal ultrasound for morbidity due to intestinal S. mansoni infection

El seguro de caución

El presente trabajo busca aclarar algunos de los principales cuestionamientos que se presentan en la actualidad al contratar un seguro de caución. Específicamente se busca dirimir y definir la esencia y naturaleza jurídica del seguro de caución respecto de otras figuras, para finalmente encuadrarlo como seguro de garantía o fianza, lo que definirá su legislación, derechos y obligaciones.Fil: Corvalán, Marcelo Adrían . Universidad Nacional de Cuyo. Facultad de Ciencias Económicas.Fil: Cucchi Azar, Juan Martín. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas.Fil: Ferrando, Lucas Mario. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas.Fil: Ferreyra, José Daniel. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas.Fil: Gobbi, Federico. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas

The role of diagnostic imaging and interventional radiology in liver schistosomiasis: A case report of advanced disease

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