El ojo ajeno Descubrimientos de Colombia

No me esperaba nada. Corría el año de gracia de 1956, yo era todavía joven pero me creía viejo, al revés de lo que me ocurre ahora. De mis cuarenta años de entonces había vivido la mayor parte en Buenos Aires, cuatro en París -que en el recuerdo se estiran a casi un siglo-, hacía dos que sudaba en el trópico de Puerto Rico. Sudaba en el sentido estricto y en el figurado: porque sentía mucho calor, y porque iniciaba mi carrera de profesor de historia del arte sin tener una formación pedagógica. Y lo hacía en la universidad de esa isla, poblada por la gente tal vez más buena y más violenta del mundo

Paso Vanoli: una instalación del Holoceno tardío en valles fluviales del sudoeste bonaerense

This paper presents the studies performed on an archaeological collection from Paso Vanoli site, housed at the Departamento Humanidades, UNS. Field works were carried out in the late 1970´s by Lic. Pérez Amat. Paso Vanoli is a ford in the lower Arroyo Napostá (Napostá Stream) in the area of urban common land of Bahía Blanca (38º 40´S; 62º 13´O), in Buenos Aires Province. It is a stratigraphic site located on a dune on the right bank of the stream. The collection is composed of lithics, pottery and human and faunistic remains. This paper presents ca. 700 yrs. BP radiocarbon dating and reports archaeofaunal and technological data. Lithic resources procurement, artifactual diversity and subsistence are discussed. It is proposed that the site was a residential base related to a spatially segregated burial. The site provides novel information on the mobility circuits in the southwest of Buenos Aires province in the Late Holocene.En este trabajo se presentan los estudios realizados sobre la colección arqueológica del sitio Paso Vanoli, conservada en el Dpto. de Humanidades de la UNS. Los trabajos de campo fueron llevados a cabo en la década de 1970 por la Lic. Pérez Amat. Paso Vanoli es un vado en el valle inferior del arroyo Napostá en el ejido urbano de Bahía Blanca (38º 40´S; 62º 13´O), provincia de Buenos Aires. Es un sitio en estratigrafía, emplazado sobre un médano, en la margen derecha del arroyo. La colección está integrada por artefactos líticos, cerámica, materiales faunísticos y restos óseos humanos. En este trabajo se presenta un fechado radiocarbónico de ca. 700 años AP y se informan los datos relacionados con las arqueofaunas y la tecnología. Se discute el abastecimiento de recursos líticos, la variabilidad artefactual y la subsistencia. Se propone que el sitio fue una base residencial vinculada con un sector de inhumaciones espacialmente segregado. Este sitio aporta información novedosa sobre los circuitos de movilidad en el sudoeste bonaerense durante el Holoceno tardío final

Global environmental changes: setting priorities for Latin American coastal habitats.

The definitive version is available at www.blackwell-synergy.comThe Intergovernmental Panel for Climate Change (IPCC) reports that Global Environmental Changes (GEC) are occurring quicker than at any other time over the last 25 million years and impacting upon marine environments (Bellard et al., 2012). There is overwhelming evidence showing that GEC are affecting both the quality and quantity of the goods and services provided by a wide range of marine ecosystems. In order to discuss regional preparedness for global environmental changes, a workshop was held in Ilhabela, Brazil (22- 26 April 2012) entitled "Evaluating the Sensitivity of Central and South American Benthic Communities to Global Environmental Changes" that drew together scientists from ten Latin American and three European countries. © 2013 Blackwell Publishing Ltd

Assisting walking balance using a bio-inspired exoskeleton controller

Background: Balance control is important for mobility, yet exoskeleton research has mainly focused on improving metabolic energy efficiency. Here we present a biomimetic exoskeleton controller that supports walking balance and reduces muscle activity. Methods: Humans restore balance after a perturbation by adjusting activity of the muscles actuating the ankle in proportion to deviations from steady-state center of mass kinematics. We designed a controller that mimics the neural control of steady-state walking and the balance recovery responses to perturbations. This controller uses both feedback from ankle kinematics in accordance with an existing model and feedback from the center of mass velocity. Control parameters were estimated by fitting the experimental relation between kinematics and ankle moments observed in humans that were walking while being perturbed by push and pull perturbations. This identified model was implemented on a bilateral ankle exoskeleton. Results: Across twelve subjects, exoskeleton support reduced calf muscle activity in steady-state walking by 19% with respect to a minimal impedance controller (p < 0.001). Proportional feedback of the center of mass velocity improved balance support after perturbation. Muscle activity is reduced in response to push and pull perturbations by 10% (p = 0.006) and 16% (p < 0.001) and center of mass deviations by 9% (p = 0.026) and 18% (p = 0.002) with respect to the same controller without center of mass feedback. Conclusion: Our control approach implemented on bilateral ankle exoskeletons can thus effectively support steady-state walking and balance control and therefore has the potential to improve mobility in balance-impaired individuals.Support Biomechanical Engineerin

Understanding the neurological implications of acute and long COVID using brain organoids

As early as in the acute phase of the coronavirus disease 2019 about the long-term implications of infection. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), like many other viruses, can trigger chronic disorders that last months or even years. Long COVID, the chronic and persistent disorder lasting more than 12 weeks after the primary infection with SARS-CoV-2, involves a variable number of neurological manifestations, ranging from mild to severe and even fatal. In vitro and in vivo modeling suggest that SARS-CoV-2 infection drives changes within neurons, glia and the brain vasculature. In this Review, we summarize the current understanding of the neuropathology of acute and long COVID, with particular emphasis on the knowledge derived from brain organoid models. We highlight the advantages and main limitations of brain organoids, leveraging their humanoerived origin, their similarity in cellular and tissue architecture to human tissues, and their potential to decipher the pathophysiology of long COVID

Estudio paleopatológico de la necrópolis mudéjar de la calle Colón, 3 (Novelda, Alicante)

X Congreso Nacional de Paleopatología. Univesidad Autónoma de Madrid, septiembre de 200