Suchergebnisse

Abstract
In this introduction we discuss the centrality of the management and perception of space-time coordinates during
the Covid-19 crisis and highlight some of the main themes that contributors develop in their articles. In particular, we analyze
how contributors' elaborations of the notion of chronotope involve a discussion of fundamental issues such as the
conceptualization of context, the relationships of chronotopes with ideologies, the configuration and interpretation of meanings
at different levels, and their social circulation.
In the second part of the introduction we discuss in what ways, by taking up a chronotopic lens, the contributors
provide new insights into some of the social processes of meaning making and changes in social relations that have been emerging
during the pandemic.

29 páginas ; La creación de organismos de regulación en Argentina se produjo en el marco de la reforma del Estado y de las privatizaciones que se llevaron a cabo en la década de los noventa. Los organismos reguladores argentinos son personas públicas estatales que forman parte de la administración pública descentralizada y no dependen del Poder Legislativo. En el sector de las telecomunicaciones y con motivo de la privatización de la Empresa Nacional de Telecomunicaciones (ENTEL), se constituyó en 1990 la Comisión Nacional de Telecomunicaciones (CNT), la cual —en virtud de su fusión con la Comisión Nacional de Correos y Telégrafos (CNCT)— después se transformó en la Comisión Nacional de Comunicaciones (CNC). En los noventa, en el sector de los servicios de comunicación audiovisual no se modificaron sustancialmente las funciones de regulación y control delimitadas por la Ley de Radiodifusión n.° 22.285 (1980) atribuidas al Comité Federal de Radiodifusión (COMFER). Con motivo del dictado de las Leyes n.° 26.522 (2009) de comunicación audiovisual y 27.078 (2014) de tecnologías de la información y las comunicaciones, se puso fin a la existencia del COMFER y de la CNC, respectivamente, y para reemplazarlas se crearon la Autoridad Federal de Servicios de Comunicación Audiovisual (AFSCA) y la Autoridad Federal de Tecnologías de la Información (AFTIC), ambas como organismos autárquicos en el ámbito del Poder Ejecutivo nacional. Las dos entidades concentraron las funciones de autoridades de aplicación de los marcos regulatorios, de control y de regulación. A partir del cambio de gobierno acaecido el 10 de diciembre de 2015, se produjeron dos importantes modificaciones en el sector de los servicios TIC y de comunicación audiovisual. Estos fueron: la creación del Ministerio de Comunicaciones y del Ente Nacional de Comunicaciones (ENACOM), este último como el continuador, a todos los efectos legales, de la AFSCA y de la AFTIC. El ENACOM se constituyó en el entendimiento de que la convergencia tecnológica demandaba que existiera un ente único de control y regulación.

ABSTRACTThe COVID‐19 pandemic created significant health, social and economic impacts, disproportionately affecting minority, immigrant and low‐income communities. Agencies were challenged to rapidly address emerging needs, yet most operated on anecdotal information. This paper describes a community‐informed family needs assessment in Miami, Florida, during November 2020–March 2021. It was conducted by a nonprofit agency collaborating with a university. The aims were to capture socio‐economic, educational and health needs experienced during the early pandemic to inform place‐based services. Eighty‐one participants, mostly Hispanic, foreign‐born parents, completed an anonymous online survey of pandemic experiences, with 15 parents participating in additional, in‐depth focus group discussions. Utilizing a mixed methods approach, results show that perceived economic, educational and psychosocial needs often exceeded and complicated health impacts, with basic needs including food/housing assistance, occupational programmes and online support groups. By coordinating the response around identified needs, this community–academic partnership strengthened and targeted their place‐based public health response, an approach that can serve to guide other communities.

La Unión Europea y los Estados Unidos de Norteamérica se encuentran negociando un mega- acuerdo comercial denominado "Acuerdo Transatlántico para el Comercio y la Inversión (ATCI)", cuyo objetivo es eliminar los aranceles y reducir barreras no arancelarias como las diferencias arbitrarias en las regulaciones y normas de la industria para productos, servicios e inversión exterior directa. Esta negociación se está llevando a cabo fuera de la órbita de la Organización Mundial del Comercio (OMC). El contenido de las negociaciones hace suponer que en el caso de firmarse dicho acuerdo el mismo generará un fuerte impacto en el comercio internacional. ; The European Union and the United States of America are negotiating a mega-trade agreement called the "Transatlantic Agreement for Trade and Investment" (TTIP), which aims to eliminate tariffs and reduce barriers, arbitrary differences in regulations and industry standards for products, services and direct foreign investment. This negotiation is taking place outside the orbit of the World Trade Organization (WTO). The content of the negotiations suggest that in the case of signing such an agreement, it will have a strong impact on international trade. ; Facultad de Ciencias Jurídicas y Sociales

[EN] Fast, high resolution and wide elastic modulus range mapping of heterogeneous interfaces represents a major goal of atomic force microscopy (AFM). This goal becomes more challenging when the nanomechanical mapping involves biomolecules in their native environment. Over the years, several AFM-based methods have been developed to address that goal. However, none of those methods combine sub-nanometer spatial resolution, quantitative accuracy, fast data acquisition speed, wide elastic modulus range and operation in physiological solutions. Here we present detailed protocols to generate high resolution maps of the elastic properties of biomolecules and polymers by using bimodal AFM. The method is fast because the elastic modulus, deformation and topography images are obtained simultaneously. The method is efficient because just a single data point per pixel is needed to generate the above images. In addition, by knowing the deformation, bimodal AFM enables to reconstruct the true topography of the surface. ; European Research Council (ERC–AdG–340177; 3DNanoMech) and grants CSD201000024 and MAT2016-76507-R from the Ministerio de Economía y Competitividad. This work received funding from the European Union's Horizon 2020 Research and Innovation Programme under Marie Sklodowska-Curie grant agreement 721874 (SPM2.0). We also acknowledge fellowships FPU15/04622 (C.A.A.) and BES-2017-081907 (V.G.G.) from the Ministerio de Educación. ; Peer reviewed

Non-destructive subsurface characterization of nanoscale structures and devices is of significant interest in nanolithography and nanomanufacturing. In those areas, the accurate location of the buried structures and their nanomechanical properties are relevant for optimization of the nanofabrication process and the functionality of the system. Here we demonstrate the capabilities of bimodal and trimodal force microscopy for imaging silicon nanowire devices buried under an ultrathin polymer film. We resolve the morphology and periodicities of silicon nanowire pairs. We report a spatial resolution in the sub-10 nm range for nanostructures buried under a 70 nm thick polymer film. By using numerical simulations we explain the role of the excited modes in the subsurface imaging process. Independent of the bimodal or trimodal atomic force microscopy approach, the fundamental mode is the most suitable for tracking the topography while the higher modes modulate the interaction of the tip with the buried nanostructures and provide subsurface contrast. ; This work was funded by the European Union FP7/2007-2013 under Grant Agreement No. 318804 (SNM), the Ministerio de Economía y Competitividad (Spain) under grants MAT2013-44858-R, CSD2010-00024 and the European Research Council ERC-AdG-340177 (3DNanoMech). ; Peer reviewed