The INQUA Dunes Atlas chronologic database Lancaster, Nicholas; Wolfe, Stephen; Thomas, David; Bristow, Charlie; Bubenzer, Olaf; Burrough, Sallie; Duller, Geoff; Halfen, Alan; Hesse, Paul; Roskin, Joel; Singhvi, Ashok; Tsoar, Haim; Tripaldi, Alfonsina; Yang, Xiaoping; Zárate, Marcelo Arístides The INQUA Dunes Atlas project has developed a global digital database of chronological information for periods of inland or continental sand dune accumulation and stabilization. The database comprises information on the site location (including coordinates), dune type, and stratigraphic context, pertinent analytical information (e.g. luminescence procedures), and literature citations to the original data source. This paper discusses the background to the project, the concept and structure of the chronologic database that forms its core, and gives some examples of the scope of the database and ways in which it can contribute to greater understanding of the spatial and temporal variability in dune development.

Espacios de consumo populares: las ferias comerciales de indumentaria en Argentina; Popular space of consumer: the clothing business fairs in Argentina Schiaffino, Guillermo Nicolás; Di Nucci, Josefina Inés En el período actual, la expansión del consumo en el territorio se materializa en las ciudades, evidenciándose el avance y la instalación de diferentes espacios de consumo. Por un lado, espacios de consumo de grandes capitales del circuito superior como son los shoppings center, supermercados e hipermercados; y por otro lado, espacios de consumo populares como las ferias comerciales de indumentaria y accesorios, denominadas muchas veces shoppings populares, con características distintivas del circuito inferior de la economía urbana (Santos, 1979). En este sentido, se observa que cada vez más las variables distintivas del período, como son la técnica, la información, la publicidad, las finanzas, el crédito, entre otras, se hacen presentes en este tipo de actividades. Proponemos en este artículo reflexionar sobre la importancia de estas variables haciendo énfasis en el consumo y en los diversos espacios comerciales. Se presentan brevemente las características del período actual y la centralidad del consumo. Luego, se profundiza en los espacios de consumo populares como las ferias comerciales de indumentaria en la Argentina para, por último, explicar sintéticamente el caso de la megaferia “La Salada”.; In the current period, the expansion of consumption in the territory materializes in cities demonstrating the progress and installation of different consumer spaces. On the one hand, consumer spaces large capital the upper circuit such as shopping centers, supermarkets and hypermarkets on the other hand, spaces popular consumer and trade shows of clothing and accessories, called often popular shopping, with distinctive features lower circuit of the urban economy (Santos, 1979). In this regard, it is noted that increasingly distinctive period variables such as technical, information, advertising, finance, credit, among others, are present in such activities. We propose in this article reflect on the importance of these variables with emphasis on consumption and the various commercial spaces. Briefly introduces the features of the current period and the centrality of consumption. Then it delves into the spaces of popular consumption and are apparel trade shows in Argentina to finally synthetically explain the case of the mega exhibition "La Salada".

Inflationary gravitational waves in collapse scheme models Mariani, Mauro; Bengochea, Gabriel Roman; Leon Garcia, Gabriel The inflationary paradigm is an important cornerstone of the concordance cosmological model. However, standard inflation cannot fully address the transition from an early homogeneous and isotropic stage, to another one lacking such symmetries corresponding to our present universe. In previous works, a self-induced collapse of the wave function has been suggested as the missing ingredient of inflation. Most of the analysis regarding the collapse hypothesis has been solely focused on the characteristics of the spectrum associated to scalar perturbations, and within a semiclassical gravity framework. In this Letter, working in terms of a joint metric-matter quantization for inflation, we calculate, for the first time, the tensor power spectrum and the tensor-to-scalar ratio corresponding to the amplitude of primordial gravitational waves resulting from considering a generic self-induced collapse. 

Phototriggered fibril-like environments arbitrate cell escapes and migration from endothelial monolayers Salierno, Marcelo Javier; García Fernández, Lui; Carabelos, Noelia; Kiefer, Karin; García, Andrés J.; Campo, Aránzazu del Cell detachment and migration from the endothelium occurs during vasculogenesis and also in pathological states. Here, we use a novel approach to trigger single cell release from an endothelial monolayer by in-situ opening of adhesive, fibril-like environment using light-responsive ligands and scanning lasers. Cell escapes from the monolayer were observed on the fibril-like adhesive tracks with 3-15 μm width. The frequency of endothelial cell escapes increased monotonically with the fibril width and with the density of the light-activated adhesive ligand. Interestingly, treatment with VEGF induced cohesiveness within the cell layer, preventing cell leaks. When migrating through the tracks, cells presented body lateral reduction and nuclear deformation imposed by the line width and dependent on myosin contractility. Cell migration mode changed from mesenchymal to amoeboid-like when the adhesive tracks narrowed (≤5 μm). Moreover, cell nucleus was shrunk showing packed DNA on lines narrower than the nuclear dimensions in a mechanisms intimately associated with the stress fibers. This platform allows the detailed study of escapes and migratory transitions of cohesive cells, which are relevant processes in development and during diseases such as organ fibrosis and carcinomas.

Cognitive problem-solving abilities and speech acts in children: an analysis in vulnerable family contexts Morelato, Gabriela Susana; Ison, Mirta Susana; Amaya, Marcela; Delgado, Melania The goal of this study was to analyze the cognitive abilities involved in interpersonal problemsolving and their connection with speech acts in children from contexts of social vulnerability. The sample included 120 schoolchildren between the ages of 8-13 in Mendoza, Argentina. The results showed that the children from more vulnerable family backgrounds, presented significantly less expressive speech acts than children at low vulnerability. It was also observed that displayed significantly poorer identification of emotions and anticipated significantly more negative consequences. In contrast, children who had high level of protective factors identified significantly more emotions, tended to generate more alternatives and anticipated less negative consequences. These results highlight the importance of carrying out early evaluations in contexts of risk, taking a preventive approach, and articulating knowledge from the fields of psychology and linguistics in order to develop new kinds of intervention and support strategies destined to children in school contexts.

First Fossil Record of Parasitic Flat-Bark Beetle (Coleoptera: Passandridae) from the Eocene of Patagonia, Argentina; Primer registro fósil de escarabajos planos de la corteza (Coleoptera: Passandridae) del Eoceno de la Patagonia, Argentina Ramírez, Leonardo César; Corsolini, Julián; Di Iorio, Osvaldo Catogenus punctatus sp. n. is the first fossil species described of the family Passandridae(Coleoptera: Cucujoidea) worldwide. The specimen was extracted from the Rio Pichileufú fossil-bearing strata, Huitrera Formation, Rio Negro, Argentina.; Catogenus punctatus sp. nov. es la primera especie fósil de la familia Passandridae (Coleoptera: Cucujoidea) descripta en el mundo. El espécimen fue extraído de los estratos fosilíferos de Río Pichileufú, en la Formación Huitrera, Río Negro, Argentina.

Utilización de imágenes satelitales para el estudio de la distribución térmica en distintas coberturas del suelo de la ciudad de Bahía Blanca (Argentina).; Utilization of satellite images to study the thermal distribution in different soil covers in Bahia Blanca city (Argentina) Ferrelli, Federico; Bustos, M.l.; Huamantinco Cisneros, M. A.; Piccolo, Maria Cintia El estudio del clima urbano es relevante para conocer el ambiente donde habita la mayor parte de la población. Las ciudades presentan sectores que incluyen estructuras edilicias, espacios verdes, suelos al descubierto, tránsito vehicular, necesidades calóricas de la ciudad y diferentes coberturas de sombras. Actualmente, el cambio climático y sus efectos sobre las ciudades son temas de gran interés científico. Son escasas las investigaciones que interpretan los cambios térmicos que se producen en el interior de las ciudades debido a la densificación de los edificios y como consecuencia de la variabilidad climática. Por tal motivo, el objetivo de este trabajo fue analizar el comportamiento de la Temperatura de Superficie Terrestre (TST) y su relación con las distintas coberturas del suelo en la ciudad de Bahía Blanca, Argentina. Para ello, se analizaron imágenes satelitales Landsat 5 TM y 7 ETM+ con el método monocanal. Además, se realizó un mapa de coberturas del suelo mediante interpretación visual de imágenes satelitales validado por intervención empírica. Posteriormente, se relacionaron los datos de TST con las coberturas del suelo. En el centro de la ciudad, la TST presentó variaciones espaciales heterogéneas según las estaciones del año y las sombras generadas por los edificios. Los mayores valores de TST se localizaron en la periferia (45,1°C) y en urbano muy disperso (46°C) y el menor en el centro de la ciudad (2°C). Las distintas coberturas del suelo generaron menores fluctuaciones de TST en invierno (>5°C) y las mayores en verano (entre 15 y 25°C).; The study of the urban climate is relevant to increase the knowledge about the environment where live most of the world’s population. Cities have areas that include buildings, green spaces, un-vegetated soils, transit, among others. Currently, scientists are focusing on the effects of climate change in cities. There is a shortage of studies that analyze the thermal changes that occur in the inner city due to the densification of buildings. For these reasons, the aim of this study was to analyze the spatial distribution of Land Surface Temperature (LST) and its relation with different soil covers in Bahia Blanca city, Argentina. Satellite images from Landsat 5 TM and Landsat 7 ETM + were analyzed with singlechannel method. Besides, it was made a soil coverage map through visual interpretation of satellite images and it was validated with field trips. LST data were compared with each soil coverage. In downtown, the LST was heterogeneous and presented spatial variations according to the season and the shadows of the buildings. The maximum values of LST were localized in the periphery (45.1°C) and in urban very sparse (46°C) and the minimum in downtown (2°C). Each soil cover had minor fluctuations in the winter (>5°C) and higher in the summer (15 to 25°C).

Variations in macrobenthic community structure in relation to changing environmental conditions in sandy beaches of Argentina Carcedo, Maria Cecilia; Fiori, Sandra Marcela; Piccolo, Maria Cintia; López Abbate, María Celeste; Bremec, Claudia Silvia This study describes for the first time the intertidal macrobenthic community of exposed sandy beaches located near the Bahía Blanca Estuary (38°S) and reports the physical characterization of this coastal fringe. The main objective of the study was to link environmental variables to biotic information, analyzing the results in the context of the Swash Exclusion Hypothesis (SEH) and possible estuarine influence. Four beaches were sampled seasonally at different distances from the mouth of the Bahía Blanca Estuary. To characterize the morphodynamic state of the beaches, the Dean parameter (Ω) was calculated. Multivariate analyses were used to assess benthic community structures and their relationships with physical variables. The two beaches located closest to the Bahía Blanca Estuary were classified as intermediate and those located further from the estuary as dissipative. Richness, diversity and biomass of intertidal macrobenthic communities varied with the SEH, increasing towards the dissipative beaches. However, total density was higher on intermediate beaches, possibly because of nutrient-rich silt-clay sediment input from the estuary, enabling them to maintain a higher density of organisms than dissipative beaches. The estuary acts as a moderator of habitat hardness, which together with the morphodynamic state of the beaches is an important factor in the structuring of the macrobenthic community along this coastal fringe.

Primer registro de Triatoma infestans (Klug) (Hemiptera: Reduviidae) asociado a nidos de loros barranqueros (Cyanoliseus patagonus) (Aves: Psittacidae); First record of Triatoma infestans (Klug) (Hemiptera, Reduviidae) associated with Burrowing Parrots nests (Cyanoliseus patagonus) (Aves: Psittacidae) Hernández, María Laura; Amelotti, Ivana; Lopez Pablo; Abrahan, Luciana Beatriz; Gorla, David Eladio; Catala, Silvia Susana Triatoma infestans es el vector más importante de la enfermedad de Chagas de la Argentina. Se cita por primera vez la presencia de T. infestans (Klug) (Hemiptera: Reduviidae) asociado a nidos de loro barranquero Cyanoliseus patagonus (Psittasiformes: Psittacidae) construidos en viviendas de adobe abandonadas. Se discuten las posibles implicancias de este hallazgo para la vigilancia entomológica del vector.; Triatoma infestans is the most important vector of Chagas disease in Argentina. We report for the first time the presence of T. infestans (Klug) (Hemiptera: Reduviidae) associated with burrowing parrot nests Cyanoliseus patagonus (Psittasiformes: Psittacidae) built on abandoned adobe houses. The possible implications of this finding are discussed, for entomological surveillance of the vector.

Democratization and School Governance: Two Cases in Latin America Miguez, Daniel Pedro This paper’s aim is to study the cultural perceptions of citizenship present in Brazil and Argentina by looking at the succession of democratic educational reforms that took place in both countries since the return of democracy and the first decades of the XXI century. In addition, the study tests the insights proposed Guillermo O’Donnel, who perceived that while Argentineans had an egalitarian perception of citizenship that sometimes resulted in anomic social relations, Brazilians had a more hierarchical conception that excluded significant majorities from the polity. The study is based on the analysis of the models of school governance proposed in official documents (laws, decrees and ministerial resolutions), showing that there are various kinds of asymmetry with varying degrees of legitimacy in the two countries. This reveals different perceptions of citizenship in Brazil and Argentina and leads to a nuanced confirmation of O’Donnel’s hypothesis.

Determination of the blocking temperature of magnetic nanoparticles: The good, the bad, and the ugly Bruvera, Ignacio Javier; Mendoza Zélis, Pedro; Calatayud, M. P.; Goya, G. F.; Sanchez, Francisco Homero A numerically solved two-level Stoner-Wohlfarth model with thermal agitation is used to simulate Zero Field Cooling (ZFC)-Field Cooling (FC) curves of monosize and polysize samples and to determine the best method for obtaining a representative blocking temperature TB value of polysize samples. The results confirm a technique based on the T derivative of the difference between ZFC and FC curves proposed by Micha et al. (the good) and demonstrate its relation with two alternative methods: the ZFC maximum (the bad) and the inflection point (the ugly). The derivative method is then applied to experimental data, obtaining the TB distribution of a polysize Fe3O4 nanoparticle sample suspended in hexane with an excellent agreement with TEM characterization.

A lower bound for faithful representations of nilpotent Lie algebras Cagliero, Leandro Roberto; Rojas, Nadina Elizabeth In this paper we present a lower bound for the minimal dimension µ(n) of a faithful representation of a finite dimensional p-step nilpotent Lie algebra n over a field of characteristic zero. Our bound is given as the minimum of a quadratically constrained linear optimization problem, it works for arbitrary p and takes into account a given filtration of n. We present some estimates of this minimum which leads to a very explicit lower bound for µ(n) that involves the dimensions of n and its center. This bound allows us to obtain µ(n) for some families of nilpotent Lie algebras.

Positive modulation of a neutral declarative memory by a threatening social event Fernández, Rodrigo Sebastián; Bavassi, Mariana Luz; Campos, Jorge; Allegri, Ricardo Francisco; Molina, Víctor Alejandro; Forcato, Cecilia; Pedreira, Maria Eugenia Memories can be altered by negative or arousing experiences due to the activation of the stress-responsive sympatho-adrenal-medullary axis (SYM). Here we used a neutral declarative memory that was acquired during multi-trial training to determine the effect of a threatening event on memory withouth emotional valence. To thgis end, participants received a new threatening social protocolbefore learning pairs of meanningless syllabes and were tested either 15´, 2 days or 8 days after acquisition. We first demostrate that this threatening social situation activates not only the SYM axis.

El lenguaje y la voz. Otras indagaciones Milone, María Gabriela En el presente artículo recorremos algunas reflexiones sobre la voz, especialmente de pensadores contemporáneos como Maurice Blanchot, Gilles Deleuze y Félix Guattari, Jacques Derrida, Michel Foucualt, Henri Meschonnic, Jean-Luc Nancy, Daniel Heller-Roazen, Pascal Quignard. Se propone pensar la resonancia y el temblor de la voz, como así también la pregunta por su edad, por su extensión, por sus estados; y siempre acompañados por la escritura poética de autores argentinos contemporáneos, tales como Juan Carlos Bustriazo Ortiz, Oscar del Barco, Juan L. Ortiz, Lilina Ponce, entre otros.

Disputas territoriales en el Valle del Intag en Ecuador: de la resistencia social contra la mega-minería a la creación de alternativas al desarrollo; Disputas territoriais no Valle do Intag, Equador: Da resistência social contra a mega-mineira à criação de alternativas ao desenvolvimento; Territorial conflicts in Intag Valley, Ecuador: From social resistance against mining enterprises to the development alternatives Wahren, Juan; Schvartz, Agustina En este artículo nos proponemos analizar y comprender los procesos de acción colectiva de los pobladores del Valle de Intag- Municipio de Cotacachi, provincia de Imbabura, Ecuadoren oposición a proyectos de explotación minera en la región por parte de compañías transnacionales de Japón y Canadá entre los años 1995 y la actualidad. Nos proponemos indagar acerca de las acciones colectivas de diferentes actores sociales donde se combinan acciones de protesta con proyectos productivos, culturales y organizativos que dan cuenta de formas de desarrollo alternativo al modelo hegemónico. En este sentido, nos interesa profundizar en las miradas críticas al “desarrollo” que subyacen en estas experiencias de acción colectiva de los movimientos sociales. Este trabajo se basa en una metodología cualitativa a través del uso de entrevistas y observaciones de campo.; Neste artigo analisamos as ações coletivas no Valle do Intag, Equador, contra os projetos mineiros das empresas transnacionais do Japão e Canada. Nessas ações coletivas um heterogêneo movimento social combina protestas publicas e diversos projetos produtivos e culturais con la meta do despregar um modelo do desenvolvimento alternativo. Esta pesquisa tem um enfoque qualitativo a traves dele uso de entrevistas e observações de campo na região do Valle do Intag.; In this article we analyze the collective actions in Intag Valley, Ecuador against the mining projects from transnational enterprises from Japan and Canada. In these collective actions, a heterogeneous social movement combine public protests with different productive and cultural projects with the objective to deploy an alternative development model. This work is based in a qualitative research perspective and we utilize interviews to some social movements leaders and field observation in the region of Intag Valley, Ecuador.

La tradición de El Pueblo. La circulación de lo gauchesco desde la prensa católica (1939-1945); The tradition of El Pueblo. The circulation of the gauchesque from the catholic press (1939-1945) Casas, Matías Emiliano Este trabajo se propone analizar la reproducción de lo gauchesco en las páginas del diario católico El Pueblo, en la coyuntura de las primeras Fiestas de la Tradición. La relación entre lo tradicional y la religión católica se había expresado con intensidad a partir de la gobernación conservadora de Manuel Fresco en la provincia de Buenos Aires. Las aproximaciones entre el gaucho y el catolicismo circularon, entonces, como una construcción ligada a cristalizar el carácter religioso del arquetipo de la tradición nacional. Esta investigación pretende desvelar cómo fue leída la oficialización del “gaucho” desde esa publicación católica masiva. Las editoriales de El Pueblo se complementaron con otras secciones que contribuyeron al denodado propósito de confirmar un “gaucho católico”.; This paper analyzes the reproduction of the gauchesque in the pages of the catholic daily El Pueblo, at the juncture of the first “Fiestas de la Tradición”. The relationship between tradition and the catholic religion had expressed - with intensity- since the conservative government of Manuel Fresco in Buenos Aires. Approaches between the gaucho and catholicism circulated as a construction linked to crystallize the religious character of the national archetype. El Pueblo publications were supplemented by other sections that contributed to the valiant purpose of confirming a "catholic gaucho". The purpose of this research is to study these interventions..

Trypanosoma cruzi infection induces the expression of CD40 in murine cardiomyocytes favoring CD40 ligation-dependent production of cardiopathogenic IL-6 Moreno Ayala, Mariela Alejandra; Casasco, Agustina; Gonzalez, Laura Mariela; Postan, Miriam; Corral, Ricardo Santiago; Petray, Patricia Beatriz The inflammatory response in the myocardium is an important aspect of the pathogenesis of Chagas heart disease raised by Trypanosoma cruzi. CD40, a transmembrane type I receptor belonging to the tumor necrosis factor receptor (TNFR) family, is expressed in a broad spectrum of cell types and is crucial in several inflammatory and autoimmune diseases. Activation of CD40 through ligation to CD40L (CD154) induces multiple effects, including the secretion of proinflammatory molecules. In the present study, we examined the ability of T. cruzi to trigger the expression of CD40 in cardiac myocytes in vitro and in a murine model of chagasic cardiomyopathy. Our results indicate, for the first time, that T. cruzi is able to induce the expression of CD40 in HL-1 murine cardiomyocytes. Moreover, ligation of CD40 receptor upregulated interleukin-6 (IL-6), associated with inflammation. Furthermore, the induction of this costimulatory molecule was demonstrated in vivo in myocardium of mice infected with T. cruzi. This suggests that CD40-bearing cardiac muscle cells could interact with CD40L-expressing lymphocytes infiltrating the heart, thus contributing to inflammatory injury in chagasic cardiomyopathy.

On the symmetry of three identical interacting particles in a one-dimensional box Amore, Paolo; Fernández, Francisco Marcelo We study a quantum-mechanical system of three particles in a one-dimensional box with two-particle harmonic interactions. The symmetry of the system is described by the point group D3d. Group theory greatly facilitates the application of perturbation theory and the Rayleigh-Ritz variational method. A great advantage is that every irreducible representation can be treated separately. Group theory enables us to predict the connection between the states for the small box length and large box length regimes of the system. We discuss the crossings and avoided crossings of the energy levels as well as other interesting features of the spectrum of the system.

Tecnología cerámica durante el período Tardío en Antofagasta de la Sierra (Prov. de Catamarca). Una visión a través de cadenas operativas; Pottery technology during the late period in Antofagasta de la Sierra (prov. Catamarca) : a view through chaine operatoire Gasparotti, Leticia Inés Este trabajo busca aportar nuevas evidencias acerca de la producción alfarera durante el Período Tardío (ca. 1000-1450 DC) en Antofagasta de la Sierra (Prov. de Catamarca). Abordando esta problemática a través de materiales provenientes de lugares que hasta hace poco tiempo no habían sido considerados relevantes para las discusiones, se pretende contribuir a comprender los procesos ocurridos durante este período de forma más acabada. A lo largo de este trabajo se considera que la tecnología cerámica es un fenómeno de prácticas socializadas y cotidianas de grupos o individuos, y que por lo tanto, una parte de la dimensión social, sus relaciones y dinámicas, puede ser aprehendida desde las elecciones tecnológicas que realiza cada alfarero/a en el proceso de manufactura. A través del caso particular del sitio Corral Alto (quebrada del rio Miriguaca), se buscó indagar en las prácticas de producción alfarera, insertas dentro del contexto socio-político que las condicionaron, y así explorar las formas de organización social a escala micro-regional.; This paper aims to provide new evidence about the pottery production during the Late Period (ca. 1000-1450 AD) in Antofagasta de la Sierra (Province of Catamarca). It addresses this problem through materials coming from places that until recently were not considered relevant to the discussions, it seeks to contribute to understanding the processes occurring during this period of more fi nished form. This problem is addressed through materials from places that until recently were not considered relevant to the discussions, with the objective to contribute to understanding the processes that occurred during this period. Along this work, the pottery technology is considered as a phenomenon of socialized and daily practices of individuals or groups, and therefore, a part of the social dimension, relationships and dynamics, can be apprehended from the technological choices performed by each potter in the manufacturing process. Through the case of Corral Alto (Miriguaca river gorge), It was sought to investigate the practices involved in the pottery production, embedded within the socio-political context that conditioned, and explore forms of social organization at micro-regional scale.

Del papel a la pantalla: tensiones y negociaciones en la transposición de tiras cómicas en el cine argentino clásico Kelly Hopfenblatt, Alejandro Para finales de los años ?40, la comedia cinematográfica argentina comenzó a mostrar indicios de agotamiento en sus modos y temáticas invitando a buscar nuevas alternativas. Una de ellas fue la adaptación de tiras cómicas que permitieron explorar caminos formales y estilísticos en el marco de la producción industrial.Estos films, surgidas de lo que Jorge Rivera denominó ?literaturas marginales? permitieron una mayor libertad en sus adaptaciones. Siendo la historieta gráfica y el cinematógrafo medios con muchos puntos en común, estas transposiciones invitaron a sus creadores a experimentar y tensionar el modelo fílmico clásico. Se presentan así un uso lúdico de los trucos visuales y el montaje, una tensión entre la narrativa aristotélica y la idea episódica de las historietas y una marcada explicitación de su carácter industrial. A diferencia de la modernidad cinematográfica, estas rupturas con el clasicismo apuntaron no tanto a búsquedas artísticas sino a reforzar y evidenciar los vínculos hacia dentro de la industria cultural de masas.