Digital electronics for the Pierre Auger Observatory AMIGA muon counters Wainberg, O.; Almela, Daniel Alejandro; Platino, Manuel; Sanchez, Federico Andrés; Suarez, Federico; Lucero, Luis Agustin; Videla, M.; Wundheiler, Brian; Melo, Diego Gabriel; Hampel, Matias Rolf; Etchegoyen, Alberto The ``Auger Muons and Infill for the Ground Array´´ (AMIGA) project provides direct muon counting capacity to the Pierre Auger Observatory and extends its energy detection range down to 0.3 EeV. It currently consists of 61 detector pairs (a Cherenkov surface detector and a buried muon counter) distributed over a 23.5 km2 area on a 750 m triangular grid. Each counter relies on segmented scintillator modules storing a logical train of `0´s and `1´s on each scintillator segment at a given time slot. Muon counter data is sampled and stored at 320 MHz allowing both the detection of single photoelectrons and the implementation of an offline trigger designed to mitigate multi-pixel PMT crosstalk and dark rate undesired effects. Acquisition is carried out by the digital electronics built around a low power Cyclone III FPGA. This paper presents the digital electronics design, internal and external synchronization schemes, hardware tests, and first results from the Observatory.

Conjuntos líticos Formativos del sitio Alero Cuevas (Salta, Argentina): puesto de caza de pastores de altura; Formative lithic assemblages from Alero Cuevas site (Salta, Argentina): highlands herders hunting spot Mercuri, Cecilia Aquí se presenta el análisis del material lítico proveniente del sitio Alero Cuevas fechado en 2020 AP. El sitio se encuentra localizado en la cuenca de Santa Rosa de los Pastos Grandes, en la Puna de la provincia de Salta. Este trabajo constituye un aporte al estudio de los conjuntos artefactuales de sociedades de base pastoril temprana. Se presentan las tendencias generales del conjunto lítico, a fin de explorar regularidades en algunos atributos tecnomorfológicos para caracterizar patrones en la confección/uso de conjuntos líticos que permitan discutir la funcionalidad del sitio. Los resultados indican que el Alero Cuevas ha sido utilizado como un sitio estacional por pastores-cazadores de altura.; The analysis of lithic assemblage from the Alero Cuevas site –dated on 2020 BP– is presented. It is located in the Santa Rosa de los Pastos Grandes basin, in the Puna of Salta province. This paper is a contribution to the study of artifact sets of early herding societies. We inform the general trends of the lithic assemblage in order to explore regularities in some techno-morphological attributes and, in turn, to characterize patterns in making / using lithic assemblages that allowed us to discuss site functionality. The results show Alero Cuevas was used as a seasonal site of highlands by herding- hunters.

Molecular phylogeny of the New World gecko genus Homonota (Squamata: Phyllodactylidae) Morando, Mariana; Medina, Cintia Débora; Avila, Luciano Javier; Perez, Cristian Hernan Fulvio; Buxton, Amy; Sites Jr., Jack W. The genus Homonota was described by Gray (1845) and currently includes 10 species: Homonota andicola, H. borellii, H. darwinii, H. fasciata, H. rupicola, H. taragui, H. underwoodi, H. uruguayensis, H. williamsii & H. whitii and one subspecies of H. darwinii (H. darwinii macrocephala). It is distributed from 15° latitude south in southern Brazil, through much of Bolivia, Paraguay, Uruguay and Argentina to 54° south in Patagonia and across multiple different habitats. Several morphological taxonomic studies on a subset of these species have been published, but no molecular phylogenetic hypotheses are available for the genus. The objective of this study is to present a molecular phylogenetic hypothesis for all the described species in the genus. We sequenced two mitochondrial genes (cyt-b & 12S: 1745 bp), seven nuclear protein coding (RBMX, DMLX, NKTR, PLRL, SINCAIP, MXRA5, ACA4: 5804 bp) and two anonymous nuclear loci (30Hb, 19Hb: 1306 bp) and implemented traditional concatenated analyses (MP, ML, BI) as well as species-tree (*beast) approaches. All methods recovered almost the same topology. We recovered the genus Homonota as monophyletic with strong statistical support. Within Homonota, there are three strongly supported clades (whitii, borellii and fasciata), which differ from those previously proposed based on scale shape, osteology, myology and quantitative characters. Detailed morphological analyses based on this highly resolved and well-supported phylogeny will provide a framework for understanding morphological evolution and historical biogeography of this phenotypically conservative genus. We hypothesize that extensive marine transgressions during Middle and Late Miocene most probably isolated the ancestors of the three main clades in eastern Uruguay (borellii group), north-western Argentina-southern Bolivia (fasciata group), and central-western Argentina (whitii group). Phylogeographic and morphological/morphometric analyses coupled with paleo-niche modelling are needed to better understand its biogeographical history.

Provincia de Buenos Aires: Mirada integral sobre el proyecto de policía municipal Spota, Julio César En la actualidad el debate en torno a la descentralización de las fuerzas de seguridad ganó entidad parlamentaria en la Provincia de Buenos Aires de la mano de la presentación de sucesivos proyectos legislativos. Distintos en su autoría pero afines en su espíritu, las iniciativas parlamentarias formuladas en la órbita política bonaerense aspiran a darle curso a la creación de cuerpos policiales municipales en aquellas jurisdicciones que superen un determinado número de habitantes (siendo la propia magnitud del guarismo un objeto de disputa entre los respectivos autores pero donde las diferencias cuantitativas oscilan entre los 70 y los 100 mil habitantes). En lo que hace a la presente exposición tomaremos como referencia los proyectos impulsados por el Gobernador Daniel Scioli y el diputado Marcelo Saín, con objeto de reflexionar en torno a los resultados susceptibles de ser esperados a raíz de la sanción efectiva de alguna de las propuestas aludidas. Sobre el particular es de especial interés atender a las especificidades normativasrectoras en el territorio nacional, provincial y local, como marco legal donde adquiere sentido el contenido conceptual de las categorías debatidas en los proyectos denotados. De forma convergente, las propuestas giran en torno a la descentralización en calidad de estrategia de desarrollo institucional conducente al diseño de las policías municipales. Cabe destacar que la descentralización remite a la acción y efecto de transferir distintos organismos y parte de laautoridad previamente ejercida por una unidad decisora central, en procura de la creación de reparticiones públicas dotadas de personalidad jurídica, patrimonio y presupuesto (la autarquía es esencial para la configuración de un proceso efectivo de descentralización).

Effects of fire on arbuscular mycorrhizal fungi in the Mountain Chaco Forest Longo, Maria Silvana; Nouhra, Eduardo Ramon; Goto, Bruno; Berbara, Ricardo; Urcelay, Roberto Carlos The aim of this study was to evaluate the fire effects on the AMF spore communities and soil chemical properties as well as the existence of possible correlations between them in the Chaco Serrano Forests of central Argentina. Our hypothesis is that the fire has a negative impact on the community of AMF spores (i.e. density, diversity, richness and evenness) and soil chemical properties. In addition, we expect to find a high correlation between changes in the communities of fungi and soil chemical properties. We selected five areas in the 'Sierras Pampeanas' mountain ranges within the Chaquean region in central Argentina. In each of them we selected adjacent burned and unburned forest sites. Burned sites have all the same time since fire occurrence (August-November 2009) and soil samples were collected in autumn (April) and spring (November) in 2010. The fire events had direct negative effects on AMF spore communities. Evenness, and notably diversity and richness of AMF spores decreased in the burned sites. Density of AMF spores was not affected by fire. With the exception of C:N, nitrate and electrical conduc- tivity, soil parameters showed significant differences between burned and unburned sites. The changes in AMF spore composition were not significantly correlated with most of the soil variables measured here. The results of this study suggest that fire occurrence negatively affect AMF communities. These effects do not seem to be mediated by changes in soil abiotic properties. Rather, they suggest direct effects of fire on soil fungi.

Measurements of Four-Lepton Production at the Z Resonance in pp Collisions at s√=7 and 8 TeV with Aad, G.; Abbott, B.; Abdallah, J.; Abdel Khalek, S.; Abdinov, O.; Otero y Garzon, Gustavo Javier; Piegaia, Ricardo Nestor; Sacerdoti, Sabrina; Reisin, Hernan Diego; Romeo, Gaston Leonardo; Alconada Verzini, María Josefina; Alonso, Francisco; Anduaga, Xabier Sebastian; Dova, Maria Teresa; Monticelli, Fernando Gabriel; Zhukov, K.; Zibell, A.; Zieminska, D.; Zimine, N. I.; Zimmermann, C.; Zimmermann, R.; Zimmermann, S.; Zimmermann, S.; Ziolkowski, M.; Zobernig, G.; Zoccoli, A.; Nedden, M. zur; Zurzolo, G.; Zutshi, V.; Zwalinski, L.; The ATLAS Collaboration Measurements of four-lepton (4ℓ, ℓ=e,μ) production cross sections at the Z resonance in pp collisions at the LHC with the ATLAS detector are presented. For dilepton and four-lepton invariant mass regions mℓ+ℓ->5  GeV and 80

Variaciones sanguíneas y corporales en bucerros nacidos en establecimientos ganaderos de Chaco y Corrientes, Argentina; Hematic and corporal variations in juvenile buffalos born in farms from Chaco and Corrientes, Argentina Koza, Gabriela Alejandra; Mussart, Norma Beatriz; Konrad, José Luis; Hernando, Josefina; Coppo, José Antonio La explotación de búfalos es una actividad en constante desarrollo en Argentina. El objetivo del ensayo fue determinar intervalos hemáticos de referencia en ejemplares juveniles (edad: 8-12 meses) criados en distintas zonas del nordeste del país. En enero de 2013 se evaluaron 30 machos de raza Mediterránea pertenecientes a dos establecimientos situados en los departamentos de Itatí (E1, n=10) y Empedrado (E2, n=10) en la Provincia de Corrientes y uno en San Fernando (E3, n=10), en la Provincia de Chaco, todos en buen estado de salud. Se registró el peso vivo (PV) y el perímetro torácico (PT), realizándose análisis hematológicos y bioquímicos. Los datos se procesaron bajo un diseño en bloques completos al azar, efectuándose estadísticas descriptivas y análisis de la varianza a una vía (p<0,05). PV resultó más elevado en E1 y E2 con relación a E3. PT fue superior en E1. Eritrocitos, hematocrito y hemoglobina fueron más altos en E1 y E2. Los leucocitos resultaron más elevados en E1 y E3. Proteínas totales, albúminas, colesterol, triglicéridos, C-HDL y C-LDL revelaron niveles más altos en E3, en tanto que E1 registró los mayores niveles de urea, calcio, magnesio y glucosa. En cambio, fructosamina no reveló diferencias significativas entre grupos. Las actividades más altas de las enzimas ALP, GGT y AST se constataron en E3, pero LDH fue mayor en E1. Las diferencias deberían atribuirse a la zona geográfica (clima, pasturas) y quizás a los sistemas de manejo de cada establecimiento. Se espera que los intervalos de referencia aquí obtenidos asuman utilidad para el diagnóstico de enfermedades y la valoración del estado nutricional de machos bubalinos en estadio juvenil de la raza Mediterránea en el nordeste argentino.; The breeding of buffalos is an activity in constant development in Argentina. The objective of this assay was to determine blood reference intervals in juvenile buffalos (age: 8-12 months) maintained in different areas of the northeast region of Argentina. In January 2013, thirty healthy male Mediterranean buffalos from two farms located in the departments of Itati (E1, n=10) and Empedrado (E2, n=10) from Corrientes Province and one in San Fernando (E3, n=10 from Chaco Province, were evaluated. Liveweight (PV) and thoracic perimeter (PT), as well as different hematological and biochemical parameters, were registered. Data were processed by a complete randomized block design using descriptive statistics and one-way analysis of variance (p<0.05). PV was higher in E1 and E2 compared to E3. PT was higher in E1. Red blood cells, packed cell volume and hemoglobin concentration were higher in E1 and E2. Total leukocytes were higher in E1 and E3. Total protein, albumin, cholesterol, triglycerides, HDL-C and LDL-C revealed higher levels in E3, whereas E1 registered the highest urea, calcium, magnesium and glucose levels. On the other hand, fructosamine did not reveal significant differences among groups. The highest enzymatic activities of ALP, GGT and AST were verified in E3, but LDH was increased in E1. Such differences should be attributed to the geographical area conditions (climate, pastures) and perhaps to the handling systems of each farm. The reference intervals obtained in this work may be useful for the diagnosis of diseases and the evaluation of the nutritional state from Mediterranean juvenile male buffalos from Northeastern Argentina.

Sufrimiento y responsabilidad: Dilemas morales en la intervención de una política pública Mancini, Inés María En este trabajo, nos proponemos abordar las conceptualizaciones de daño y sufrimiento en el contexto de la intervención de una política pública en una villa de emergencia de la ciudad de Buenos Aires. Nuestras reflexiones girarán en torno a algunos acontecimientos observados durante nuestro trabajo de campo: nos centraremos en episodios complejos, que se presentan para los actores como rupturas morales, en tanto y en cuanto implican una disrupción en la cotidiana irreflexividad de las moralidades (Zigon, 2007). Además, estos episodios resultan pertinentes para discutir distintas interpretaciones de los actores respecto del sufrimiento y la atribución de responsabilidades por este.; In this paper, we aim to describe the conceptualizations of harm and suffering that take place in the meetings organized by a social programm in a slum located in Buenos Aires City. Our reflections will focus on some events observed during our field work: we will focus on complex events, which are presented as moral breakdowns, as long as involve a disruption in the daily thoughtlessness of moralities (Zigon, 2007). Furthermore, these episodes are relevant to discuss different interpretations about suffering and the way people assign responsibility.

Optimal auxiliary-covariate-based two-phase sampling design for semiparametric efficient estimation of a mean or mean difference, with application to clinical trials Gilbert, Peter B.; Yu, Xuesong; Rotnitzky, Andrea Gloria To address the objective in a clinical trial to estimate the mean or mean difference of an expensive endpoint Y, one approach employs a two-phase sampling design, wherein inexpensive auxiliary variables W predictive of Y are measured in everyone, Y is measured in a random sample, and the semiparametric efficient estimator is applied. This approach is made efficient by specifying the phase two selection probabilities as optimal functions of the auxiliary variables and measurement costs. While this approach is familiar to survey samplers, it apparently has seldom been used in clinical trials, and several novel results practicable for clinical trials are developed. We perform simulations to identify settings where the optimal approach significantly improves efficiency compared to approaches in current practice. We provide proofs and R code. The optimality results are developed to design an HIV vaccine trial, with objective to compare the mean 'importance-weighted' breadth (Y) of the T-cell response between randomized vaccine groups. The trial collects an auxiliary response (W) highly predictive of Y and measures Y in the optimal subset. We show that the optimal design-estimation approach can confer anywhere between absent and large efficiency gain (up to 24 % in the examples) compared to the approach with the same efficient estimator but simple random sampling, where greater variability in the cost-standardized conditional variance of Y given W yields greater efficiency gains. Accurate estimation of E[Y|W] is important for realizing the efficiency gain, which is aided by an ample phase two sample and by using a robust fitting method.

Productivity and linkages of the food web of the southern region of the western Antarctic Peninsula continental shelf Ballerini, Tosca; Hofmann, Eileen E.; Ainley, David G.; Daly, Kendra; Marrari, Marina; Ribic, Christine A.; Smith, Walker O.; Steele, John H. The productivity and linkages in the food web of the southern region of the west Antarctic Peninsula continental shelf were investigated using a multi-trophic level mass balance model. Data collected during the Southern Ocean Global Ocean Ecosystem Dynamics field program were combined with data from the literature on the abundance and diet composition of zooplankton, fish, seabirds and marine mammals to calculate energy flows in the food web and to infer the overall food web structure at the annual level. Sensitivity analyses investigated the effects of variability in growth and biomass of Antarctic krill (Euphausia superba) and in the biomass of Antarctic krill predators on the structure and energy fluxes in the food web. Scenario simulations provided insights into the potential responses of the food web to a reduced contribution of large phytoplankton (diatom) production to total primary production, and to reduced consumption of primary production by Antarctic krill and mesozooplankton coincident with increased consumption by microzooplankton and salps. Model-derived estimates of primary production were 187-207gCm-2y-1, which are consistent with observed values (47-351gCm-2y-1). Simulations showed that Antarctic krill provide the majority of energy needed to sustain seabird and marine mammal production, thereby exerting a bottom-up control on higher trophic level predators. Energy transfer to top predators via mesozooplanton was a less efficient pathway, and salps were a production loss pathway because little of the primary production they consumed was passed to higher trophic levels. Increased predominance of small phytoplankton (nanoflagellates and cryptophytes) reduced the production of Antarctic krill and of its predators, including seabirds and seals.

Las condiciones formales del cambio cultural en la ruralidad: El análisis de un caso en el Valle de Traslasierra, Córdoba, Argentina Trimano, Luciana Geraldine La comunidad de Las Calles, ubicada en el Valle de Traslasierra, al oeste de la provincia de Córdoba (Argentina), se caracteriza por la combinación de lo rural y lo turístico; es escenario de un amplio movimiento de emigración de la ciudad al campo. En esta sociedad, conviven grupos culturales diversos y disímiles identidades. Entendiendo que esos grupos culturales forman parte de la “cultura” como espacio estratégico de comprensión de las tensiones que desgarran y recomponen el “estar juntos”. La presentación plantea el análisis de las interacciones de actores de culturas emergentes (hippiescabañeros) y preexistentes (paisas) en esta territorialidad rural y la aparición de nuevas prácticas ciudadanas. Desde ese lugar, la propuesta de Margaret Archer –razonamiento lógico abstracto– permite pensar procesos de “morfogénesis” y “morfoéstasis”, es decir, situaciones en las que la cultura cambia (disenso, situación dinámica) y situaciones en las que se mantiene estable (consenso). Se trata de observar en qué condiciones formales ocurre cada cosa, siendo el núcleo explicativo el tipo de “interacción sociocultural” que vincula a los agentes.

Latitudinal variation in clutch size-lay date regressions in Tachycineta swallows: Effects of food supply or demography? Winkler, David W.; Ringelman, Kevin M.; Dunn, Peter O.; Whittingham, Linda; Hussell, David J. T.; Clark, Robert G.; Dawson, Russell D.; Johnson, L. Scott; Rose, Alexandra; Austin, Suzanne H.; Robinson, W. Douglas; Lombardo, Michael P.; Thorpe, Patrick A.; Shutler, Dave; Robertson, Raleigh J.; Stager, Maria; Leonard, Marty; Horn, Andrew G.; Dickinson, Janis; Ferretti, Valentina; Massoni, Viviana; Bulit, Florencia; Reboreda, Juan Carlos; Liljesthrom, Marcela; Quiroga, Martin Anibal; Rakhimberdiev, Eldar; Ardia, Daniel R. In a study of almost 16 000 nest records from seven swallow species across the entire Western Hemisphere, clutch sizes decline with relative laying date in each population, but the slope of this decline grows steeper with increasing distance from the equator. Late-laying birds at all latitudes lay clutches of similar sizes, suggesting that latitudinal differences may be driven primarily by earlier-laying birds. Focused comparisons of site-years in North America with qualitatively different food availability indicate that food supply significantly affects mean clutch size but not the clutch size-lay date regression. Other studies on the seasonality of swallow food also indicate that steeper clutch size-lay date declines in the North are not caused by steeper earlier food peaks there. The distribution of lay dates grows increasingly right-skewed with increasing latitude. This variation in lay-date distributions could be due to the predominance of higher quality, early-laying (and large-clutched) individuals among populations at higher latitudes, resulting from latitudinal variation in mortality rates and the intensity of sexual selection. Our results underscore the importance of studying clutch size and lay date in tandem and suggest new research into the causes of their joint geographic variation.

Amaranth Milling Strategies and Fraction Characterization by FT-IR Roa Acosta, Diego Fernando; Santagapita, Patricio Roman; Buera, Maria del Pilar; Tolaba, Marcela Patricia Amaranth nutritional value has been widely recognized, but the required conditions for its processing cannot be adapted to traditional technologies. For the proposal of alternative strategies, the changes of several components should be understood. Enriched starch and lipid-protein fractions of amaranth flour upon different milling treatments were obtained and characterized by attenuated total reflectance-Fourier transform-infrared spectroscopy. Starch- and lipid-protein-enriched amaranth fractions were obtained by abrasive milling; amaranth starch was isolated by wet-milling procedure, and flour samples were obtained from planetary ball milling. Changes on starch, protein, and lipids relative contents, on starch crystallinity and on lipids and protein stability after milling and 6-month storage, were evaluated. The Fourier transform-infrared (FT-IR) spectroscopy peaks of the main grain components were identified in the middle-infrared range. By calculating the ratios between height intensities of selected specific peaks, several characteristics of the samples could be explained: increased protein content and lipid proportion of the enriched fraction; decrease of the starch crystallinity degree by abrasive milling and especially by ball milling due to starch amorphization during these processes; and lipids modification in milled and in 6-month aged samples. FT-IR analysis can be considered a rapid, nondestructive, solvent-free, sensitive, and useful tool to investigate starch, lipid, and protein modifications provoked by processing and storage as well as to determine, based on intensity ratio, the relative proportion of grain components within amaranth milling fractions. The abrasive milling associated to planetary ball milling to obtain modified different fractions is presented as an interesting strategy for the processing of amaranth grain.

Proliferación subdisciplinar en biología: debacle del reduccionismo y nuevas estrategias de unificación; Proliferation of subdisciplines in biology: the debacle of reductionism and new strategies of unification Ferreira Ruiz, María José; Folguera, Guillermo Durante las últimas décadas, la biología ha sido objeto de una considerable proliferación teórica y subdisciplinar, hecho que suscita la pregunta acerca de su unidad. Por ello, a partir del abandono del reduccionismo como estrategia unificadora, el interrogante filosófico es qué otras formas alternativas de relaciones subdisciplinares son posibles, y si dichas relaciones logran dar unidad a la biología. En el presente artículo, a partir de una breve consideración de algunos de los problemas que el programa reduccionista ha tenido en biología, analizaremos diferentes tipos de relaciones que se encuentran entre las subdisciplinas de la biología contemporánea. En particular, indagaremos cuatro de las principales propuestas que pueden encontrarse en la literatura filosófica especializada; ofrecemos entonces dos nuevas propuestas de relación interdisciplinar: el isomorfismo de la biología evolutiva, e la importación/exportación de cuerpos teóricos, propia de la relación entre la ecología y la fisiología. Finalmente, presentaremos algunas consideraciones en torno al objetivo de la unidad de la ciencia en general, como también acerca de la clase de cohesión que creemos posible para la biología a partir de nuestros análisis, defendiendo la idea de un pluralismo de las relaciones interdisciplinares y de la unidad como un fenómeno local.; Over the last decades, in biology there has been a proliferation of subdisciplines and theories, and this poses a question about its unity. Consequently, after reductionism was abandoned as a unifying strategy, philosophical questions have been raised about the possibility of alternative forms of relations among the subdisciplines, and whether they can effectively accomplish a unity of biology. This article starts with a brief consideration of some of the problems that the reductionist program confronts in biology, and then analyzes different kind of relations that are present among the subdisciplines of contemporary biology. In particular, we investigate four of the main proposals that can be found in the specialized philosophical literature; and then we propose two models of inter-disciplinary relations: isomorphism in evolutionary biology, and import/export of theoretical corpus, present in the relation between ecology and physiology. Finally, we offer a few ideas on unity as a goal for science in general, and also about the kind of cohesion that we think to be possible for biology based on our analysis. Thus, we defend the idea of pluralism of inter-disciplinary relations and of unity as a local phenomenon.

Dinámica inmobiliaria en la ciudad de Buenos Aires (2001-2011) Guevara, Tomás Alejandro La dinámica inmobiliaria conformada en la ciudad Autónoma de Buenos Aires en el período 2001-2011 adquirió un carácter excluyente y provocó un estrechamiento de las condiciones de acceso a la vivienda para sectores populares y medios. Esto se evidencia tanto en la evolución del precio de los terrenos, como en la evolución del precio de venta del metro cuadrado construido o del precio del alquiler, entre otras variables. Como consecuencia, el déficit habitacional fue en aumento durante todo el período, donde sobresale el componente de población en villas y asentamientos. El artículo se basa en estadísticas oficiales y privadas de precios de inmuebles, alquileres, superficies construidas, créditos hipotecarios, etc.

Dieta del Aguilucho Común (Geranoaetus polyosoma) en pastizales costeros y zonas periurbanas de la Región Pampeana; Diet of the variable hawk (Geranoaetus polyosoma) in grasslands and periurban zones of the pampean region of Argentina Baladron Felix, Alejandro Victor; Cavalli, Matilde; Martínez, Guadalupe Se estudió la dieta del Aguilucho Común (Geranoaetus polyosoma) durante el período no reproductivo en dos áreas contrastantes, un pastizal natural y una zona periurbana ubicadas en el sudeste de la Región Pampeana (Argentina), con el objetivo de evaluar si los hábitos tróficos de esta rapaz cambian de acuerdo al ambiente. La dieta del Aguilucho Común estuvo compuesta exclusivamente por micromamíferos en ambos sitios, aunque los ítem presa consumidos difirieron entre hábitats. El ratón de campo (Akodon azarae) fue la presa dominante en pastizales naturales, mientras que el tuco-tuco (Ctenomys talarum) fue la presa principal en zonas periurbanas. El Aguilucho Común realizó un alto consumo de roedores grandes en pastizales (83,3% menores a 30 g de peso promedio) en comparación con zonas periurbanas (61,5% mayores a 90 g de peso promedio). Los resultados evidenciarían la plasticidad de esta rapaz a cambiar su comportamiento alimentario dependiendo de las condiciones locales.; We studied the diet of the Variable Hawk (Geranoaetus polyosoma) during non-breeding season in two contrasting areas, a natural grassland and a periurban zone located in the southeast of the Pampean Region (Argentina), in order to address if food habits of this raptor change according to location. The diet of the Variable Hawk was composed exclusively of small mammals in both sites, although prey items were different between habitats. Akodon azarae was the dominant prey in grasslands, whereas Ctenomys talarum was the main prey in periurban zones. The Variable Hawk showed a high consumption of small rodents in grasslands (83.3% smaller than 30 g of mean mass) in comparison to periurban zones (61.5% larger than 90 g of mean mass). Our results would be evidencing the plasticity of this raptor to change its feeding behavior depending on the local conditions.

La dirigencia peronista jujeña y el movimiento obrero en el tercer gobierno de Perón: del entendimiento a la violencia política; Jujuy’s Peronist leadership and the labour movement during the third Peronist government: from understanding to political violence Kindgard, Adriana Mercedes Las relaciones entre la dirigencia peronista de Jujuy y el movimiento obrero no escaparon de los efectos derivados del avance – habilitado desde el poder central– de los sectores de derecha dentro del movimiento peronista, efectos pronto evidenciados en la escalada de violencia política instrumentada desde el Estado. Las líneas que siguen pretenden dar cuenta de las especificidades de estos procesos en la provincia norteña y del rol que jugaron los referentes claves del peronismo provincial, echando alguna luz sobre la cuestión de las complejas formas que en aquella coyuntura crítica asumió la conjunción de contextos nacionales y locales.; The relations between Jujuy’s Peronist leadership and the labour movement could not escape from the effects of the advance - promoted by the central power- of the right-wing sectors within the Peronist movement. These effects were soon evidenced in the increase of political violence carried out by the State. The following lines intend to give an account of the specifics of these processes in the Northern Province and of the role played by the key members of provincial Peronism, shedding some light on the question of the complex forms which the conjunction of national and local contexts assumed on that critical juncture.

Biocapital, indocumentação e experiência de classe na fronteira uruguaio-brasileira; Biocapital, indocumentación y experiencia de clase en la frontera uruguayo-brasileña; Biocapital, undocumentation and class experience in the Uruguayan-Brazilian border Martins Moraes, Alex El entrelazamiento entre situación de indocumentación y regímenes capitalistas de extracción de valor inscriben la existencia de algunos trabajadores rurales que habitan las fronteras del Mercado Común del Sur en un verdadero estado de excepción, que favorece y potencia los efectos del biocapital sobre sus cuerpos y subjetividades. En el presente trabajo, basado en una investigación etnográfica de dos años en la frontera brasileño-uruguaya, me propongo a reconstruir estas complejas cartografías del poder de modo de alinear la teoría social con una crítica situada y corporizada de los sistemas de dominación. Fuente: Pacarina del Sur - http://www.pacarinadelsur.com/index.php?option=com_content&view=article&id=882&catid=14&Itemid=31#resumen - Prohibida su reproducción sin citar el origen.; Nas fronteiras do Mercado Comum do Sul (Mercosul), o entrelaçamento entre situação de indocumentação e regimes capitalistas de extração de valor inscrevem a existência de determinados trabalhadores rurais em um verdadeiro estado de exceção que potencializa os efeitos do biocapital sobre seus corpos e subjetividades. Neste trabalho, baseado em uma investigação etnográfica de dois anos na fronteira brasileiro-uruguaia, eu reconstruo estas complexas cartografias do poder, de modo a alinhar a teoria social com uma crítica situada e corporizada dos sistemas de dominação.; The entanglement between undocumentation and capitalist regimes of value extraction inscribes the existence of some rural workers who inhabit the borders of the Southern Common Market in a real exception zone, that promotes and enhances biocapital effects over their bodies and subjectivities. In this article, based on a two-year ethnographic research on the Brazilian-Uruguayan border, I intend to reconstruct these complex cartographies of power in order to link social theory with a situated and embodied critique of domination systems. Fuente: Pacarina del Sur - http://www.pacarinadelsur.com/index.php?option=com_content&view=article&id=882&catid=14&Itemid=31#abstract - Prohibida su reproducción sin citar el origen.

La cuestión criminal: sensacionalismo y discurso mítico Tonkonoff, Sergio Esteban El presente artículo explora la reacción de gran intensidad afectiva que el crimen desencadena, partiendo de la premisa que esa afectividad no parece pura y simplemente repulsiva. Antes bien, se caracteriza por su ambivalencia. Afirmaremos que esto es así porque el acontecimiento criminal pone fuera de sí a los individuos habitualmente sujetos al ensamble societal y sus medidas. Este desequilibrio ocurre tanto en el plano afectivo como en el cognitivo, y en ciertas condiciones de comunicación puede conducirlos a estados de público o de multitud. Ello explica el exceso de la respuesta colectiva, tanto como la ambivalencia que comporta. Ello explica también que el mito sea la forma discursiva que habitualmente le corresponde −tales son al menos las tesis que hemos querido explorar aquí.

Tlatelolco 1968 y otros gritos subalternos del cine latinoamericano; Tlatelolco 1968 and other subaltern shouting from Latin American cinema Mestman, Mariano Ernesto En 1968, los estudiantes mexicanos del Centro Universitario de Estudios Cinematográficos (CUEC-UNAM) acompañaron con sus cámaras las protestas del Movimiento Estudiantil entre los primeros incidentes de julio y la masacre de Tlatelolco del 2 de octubre. Esos registros fueron guardados durante algunos meses ante la persecución desatada por el gobierno de Gustavo Díaz Orda y entre 1969 y 1970 terminaron de editarse en el largometraje documental El grito (Leobardo López Arretche). El presente artículo estudia la singular configuración del testimonio en aquel documental y su articulación con la representación de las protestas masivas. Asimismo, se compara con otros casos de la “literatura testimonial” de esos años también llevados al cine, a partir de una clásica distinción de John Beverley entre dos momentos clave de la producción testimonial latinoamericana: la coyuntura de radicalización en que emerge el “género” en los años 60 y aquella posterior (y distinta) cuando se articuló en la denuncia de las violaciones de derechos humanos y las represiones más cruentas desde la década de 1970.; In 1968, students from the Centro Universitario de Estudios Cinematográficos (CUEC-UNAM) captured with their cameras the process of protests, between the firsts manifestations in July and the October, 2 Tlatelolco massacre. Given the represions of Gustavo Díaz Ordaz government, the footage was hidden and finally edited between 1969 and 1970 to make the documentary El grito (Leobardo López Arretche). This article discusses the presence of the testimony and the representation of masses in El grito following John Beverly´s reflections about the genre. He has pointed out two key moments of Latin American testimonial literature: the emergence of the genre in the sixties still at the Revolutionary imaginary, and its place during the complaints on violations of human rights after the military goverments of the seventies. Drawing on Beverly´s distinction for the literature, this work focus on film, and also compares El grito with other testimonial latin american films of those years.