Voice Signal Typing Using a Pattern Recognition Approach Miramont, Juan Manuel; Restrepo Rinckoar, Juan Felipe; Codino, J.; Jackson-Menaldi, C.; Schlotthauer, Gaston Voice signal classification in three types according to their degree of periodicity, a task known as signal typing, is a relevant preprocessing step before computing any perturbation measures. However, it is a time consuming and subjective activity. This has given rise to interest in automatic systems that use objective measures to distinguish among the different signal types. The purpose of this paper is twofold. First, to propose a pattern recognition approach for automatic voice signal typing based on a multi-class linear Support Vector Machine, and using rather well-known parameters like Jitter, Shimmer, Harmonic-to-Noise Ratio, and Cepstral Prominence Peak in combination with nonlinear dynamics measures. Two novel features are also proposed as objective parameters. Second, to validate this approach using a large amount of signals coming from two well-known corpora using cross-dataset experiments to assess the generalizability of the system. A total amount of 1262 signals labeled by professional voice pathologists were used with this purpose. Statistically significant differences between all types were found for all features. Accuracies over 82.71% were estimated in all intra-datasets and inter-datasets using cross-validation. Finally, the use of posterior probabilities is proposed as a measure of the reliability of the assigned type. This could help clinicians to make a more informed decision about the type assigned to a voice. These outcomes suggest that the proposed approach can successfully discriminate among the three voice types, paving the way to a fully automatic tool for voice signal typing in the future.

Ethos crítico y a priori histórico de una experiencia posible: contribución filosófica a la noción de crítica desde una ontología del presente Vignale, Silvana Paola Tal como lo anticipa el título de este dossier, la crítica se concibe como el trabajo sobre los límites y las posibilidades de un determinado objeto. Nuestra contribución se ocupará de atender el carácter de la crítica desde una perspectiva filosófica, más específicamente, desde el trabajo filosófico de una ontología del presente. Para eso, la abordaremos en un primer momento como una metódica de la investigación en las ciencias sociales y humanas, tomando distancia del disciplinamiento que busca reducir el trabajo teórico a metodologías prefabricadas. El posicionamiento crítico involucra al investigador en la realidad que investiga, e historiza su emergencia junto al objeto de estudio, con atención a las implicancias entre saber y poder, en el marco de lo que podemos denominar una epistemología crítica.

El proceso de sindicalización de los gremios policiales en Uruguay; The unionization process of police unions in Uruguay Calandrón, Julieta Sabrina; Galar, Santiago; Da Silva Lorenz, Mariana En 2006, formalmente la Policía Nacional de Uruguay obtuvo el derecho a sindicalizarse. Este derecho tuvo como precedente un intenso proceso de intervención de la Policía en la arena pública. Teniendo en cuenta el contexto regional, el objetivo de este artículo es analizar las dimensiones vinculadas con la sindicalización de la Policía uruguaya, atendiendo especialmente a las herramientas políticas desarrolladas y a las diversas adscripciones gremiales que este proceso contiene. Entre los principales resultados, esta investigación evidencia que el modelo sindical habilitado desde las esferas políticas ?que dista de ser el del sindicato ?único y por rama?? posibilita la fragmentación y diversificación de organizaciones que conviven, se asocian o se disputan el poder de acuerdo con las circunstancias y el posicionamiento político frente al Gobierno de turno. Este trabajo se realizó con una metodología cualitativa y exploratoria, esto último como derivación de la ausencia de investigaciones anteriores sobre el tema. Se realizaron entrevistas en profundidad con informantes clave y se reveló información de dos diarios (período 2015-2018) que permitieron reconstruir hechos y dar voz a actores significativos. Finalmente se registraron sitios web institucionales de los sindicatos, complementando esta información con leyes y decretos relacionados con temas surgidos del análisis del corpus.; The National Police of Uruguay obtained the right to unionize in 2006. This right was obtained after an intense intervention process of the Police in the public arena. With the regional context considered, this article seeks to analyze the unionization dimensions of the Uruguayan Police, paying close attention to the political tools developed and the diverse union affiliation in this process. Among its key results, this research highlights how the union model, which has been created by political sectors and is very different from the “trade union”, makes the fragmentation and diversification of organizations possible. These organizations coexist, associate with each other, and contest power according to the circumstances and the political opportunities present with the incumbent government. This research was conducted with a qualitative and exploratory methodology due to the lack of previous studies on this topic. In-depth interviews with key informants were conducted, and the information from two newspapers (2015-2018 period) made it possible to reconstruct facts and to give voices to important actors. Finally, institutional websites from unions were registered, which were complimented with information about laws and decrees related to the themes of analysis of the corpus.

Política exterior y de defensa en Argentina: De los gobiernos kirchneristas a Mauricio Macri (2003-2019); Foreign and Defense Policy in Argentina: From the Kirchner Governments to Mauricio Macri (2003-2019) Busso, Anabella Estela; Barreto, Luis Maximiliano El presente artículo tiene como objetivo avanzar reflexiones exploratorias y preliminares sobre el vínculo entre la política exterior y de defensa en Argentina, abordando los gobiernos kirchneristas (2003-2015) y el gobierno de Mauricio Macri (2015-2019). Se asumen como supuestos que este es un tema escasamente estudiado en dicho país y que la política exterior argentina ha mostrado signos de discontinuidad a lo largo del tiempo. Sobre la base de una estrategia metodológica cualitativa y del análisis de fuentes primarias y secundarias, se asevera que la política exterior ha enmarcado e influenciado a la política de defensa, no viceversa, y que esas influencias variaron en función de cómo los gobiernos nacionales entendieron a la política exterior en tanto política pública, qué propuesta de inserción internacional privilegiaron y qué modelo de desarrollo propusieron.; This paper aims to advance exploratory and preliminary reflections on the link between foreign and defense policy in Argentina, focusing on the Kirchner governments (2003-2015) and the government of Mauricio Macri (2015-2019). The subject has been poorly studied in this country and Argentina's foreign policy has shown signs of discontinuity over time. On the basis of a qualitative methodological strategy and the analysis of primary and secondary sources, it is asserted that foreign policy has framed and influenced defense policy, not vice versa, and that these influences varied depending on how national governments understood foreign policy as a public policy, what international insertion proposal they favored and what development model they proposed.

Agonist Effects of Propranolol on Non-Tumor Human Breast Cells Gargiulo, Lucía; Rivero, Ezequiel Mariano; Di Siervi, Nicolás; Buzzi, Edgardo David; Buffone, Mariano Gabriel; Davio, Carlos Alberto; Luthy, Isabel Alicia; Bruzzone, Ariana The β-blocker propranolol (PROP) has been proposed as a repurposed treatment for breast cancer. The similarity of action between β-agonists and antagonists found on breast cells encouraged us to compare PROP and isoproterenol (ISO, agonist) signaling pathways on a human breast cell line. Cell proliferation was measured by cell counting and DNA-synthesis. Cell adhesion was measured counting the cells that remained adhered to the plastic after different treatments. Changes in actin cytoskeleton were observed by fluorescence staining and Western Blot. ISO and PROP caused a diminution of cell proliferation and an increase of cell adhesion, reverted by the pure β-antagonist ICI-118551. ISO and PROP induced a reorganization of actin cytoskeleton increasing F-actin, p-COFILIN and p-LIMK. While ISO elicited a marked enhancement of cAMP concentrations and an increase of vasodilator-stimulated phosphoprotein (VASP) and cAMP response element-binding protein (CREB) phosphorylation, PROP did not. Clathrin-mediated endocytosis inhibition or β-arrestin1 dominant-negative mutant abrogated PROP-induced cell adhesion and COFILIN phosphorylation. The fact that PROP has been proposed as an adjuvant drug for breast cancer makes it necessary to determine the specific action of PROP in breast models. These results provide an explanation for the discrepancies observed between experimental results and clinical evidence.

Mapas de un futuro posible. Artefactos visuales en la construcción de una representación proyectiva sobre la Patagonia argentina (Bahía Blanca, 1940-1970); Maps of a possible future. Visual artifacts in the construction of a projective representation of the argentinian Patagonia (Bahía Blanca, 1940- 1970) López Pascual, Juliana Este trabajo reconstruye y analiza la producción de imágenes paisajísticas y cartográficas de la Patagonia argentina -ocurrida en Bahía Blanca a mediados del siglo XX- como parte del proceso sociocultural que buscaba consolidar una noción de centralidad de la localidad bonaerense sobre la región sureña. En este sentido, argumentaremos que la gráfica en cuestión se hizo eco de la primacía del sentido de la vista en las sociedades occidentales modernas y contribuyó a la conformación de una cultura visual articulada a la movilización de un amplio sector de la ciudadanía bahiense que, por diferentes vías, buscaba concretar una posición de hegemonía regional.; This work reconstructs and analyzes the production of landscape and cartographic images of the argentinian Patagonia – occurred in Bahía Blanca in the mid-twentieth century – as part of the socio-cultural process that sought to consolidate a notion of centrality of this town over the southern region of the country. In this sense, we will argue that the graphics in question echoed the primacy of the sense of sight in modern western societies and contributed to the conformation of a visual culture which articulated to the mobilization of a broad sector of the Bahía Blanca citizens that, by different ways, were looking for a position of regional hegemony.

El pensamiento tipológico como obstáculo para la arqueología de los procesos de evolución en las sociedades sin Estado; The typological thought as an obstacle to the archaeology of the evolution processes in stateless societies Nielsen, Axel Emil El estudio de aspectos sociales y políticos de las poblaciones que ocuparon el Noroeste argentino durante el Período de Desarrollo Regionales ha captado considerablemente la atención en los últimos años (Cremonte 1992; Nielsen 1988, 1989, 1992; Palma 1993; Raffino 1988; Tarragó 1987). Estos trabajos presentan varios puntos de contacto con los enfoques teóricos sustentados por quienes han investigado la naturaleza de las sociedades que preceden al estado en otros países –notablemente los Estados Unidos- durante las últimas tres décadas, desde la publicación de las obras seminales de Service (1962, 1984 [1975]) y Fried (1967) sobre evolución cultural.

Invasion success of the large hairy armadillo (Chaetophractus villosus) in a sub-antarctic insular ecosystem (Isla Grande, Tierra del Fuego, Argentina) Gallo, Jorge Alberto; Fasola, Laura; Abba, Agustin Manuel The large hairy armadillo (Chaetophractus villosus) was introduced to the Isla Grande of Tierra del Fuego almost 35 years ago. Previous studies described the armadillo’s distribution relative to heated oil pipelines. The present study updates this distribution, and evaluates associations with additional environmental variables to better explain the dispersion process and to propose areas for the control/eradication of this invasive species. We conducted 52 random transects looking for indirect evidence of the presence of C. villosus such as burrows and “foraging pits”. We looked for associations between the presence/habitat use of armadillos with local environmental characteristics and landscape features. We also gathered information about the invasion process through interviews with rural settlers. The species’ distribution was calculated with the Minimum Convex Polygon method, and a linear invasion rate was calculated. Finally, a map with priority areas for eradication was developed. Armadillos occur in areas with tall and medium-height vegetation and avoid low and floodable terrains. Signs of armadillo presence were more abundant in areas with humic soils but were not associated with any landscape features. The distribution of C. villosus increased by 4735.92 km2 in 12 years with an average linear expansion rate of 10.91 km/year. Humans seem to have facilitated the spread of armadillos towards the south. Implementation of any control measures should be focused on two areas of the island: namely those with high terrains, medium/high vegetation height and humic soils. This invasion represents a socio-ecological problem that needs full and urgent attention while eradication is still feasible.

Notas para un estudio de las agendas y los discursos sobre la pobreza en la prensa local argentina Sánchez, María del Rosario; London, Silvia La pobreza constituye una problemática estructural y coyuntural en Argentina. Más allá de las controversias en torno a su delimitación conceptual y su medición, esta realidad se evidencia desde diversos enfoques teórico metodológicos que estudian el fenómeno. Partiendo de esta premisa, el presente trabajo reúne algunas reflexiones que buscan aportar a la explicación de esta agenda urgente desde el análisis de la representación mediática de la problemática. Se trata de una primera aproximación al problema, en la que se reseñan antecedentes sobre el tema y se exponen pautas metodológicas de un estudio en curso acerca de la prensa de la ciudad de Bahía Blanca, Argentina. La literatura indica que la temática se instala en los medios del país de manera definitiva a partir de la crisis de 2001; la información ingresa en forma sesgada, no aparece como tópico principal ni explica sus causas estructurales. La descripción del método construido para el abordaje del caso presenta claves para un estudio interdisciplinario del fenómeno, en la búsqueda de contribuir al conocimiento sobre el tema.

Lignocellulosic nanofibers for the reinforcement of brown line paper in industrial water systems Tarres, Quim; Area, Maria Cristina; Vallejos, María Evangelina; Ehman, Nanci Vanesa; Delgado Aguilar, Marc; Mutjé, Pere The addition of nanofibrillated cellulose in paper production requires attention to its dispersion and retention during the paper forming process, and this is commonly facilitated by the use of retention agents. The performance of retention agents, which commonly have a cationic charge, is affected by the presence of dissolved and colloidal substances in the process water. In the process of paper production at an industrial level, especially when using recycled paper, there are a large amount of dissolved and colloidal substances in the water. A high proportion of these substances are negatively charged and are commonly referred to as anionic trash. Its presence increases the conductivity and charge density of the water, and this has a negative influence on the retention of cellulose nanofibers. In brown line paper production, some fibers have already been refined in at least one previous papermaking cycle. In this sense, recycled fibers have a reduced capacity to benefit from refining as they have suffered morphological damage. On the other hand, the addition of lignocellulosic nanofibers in the production of brown line paper has been found helpful to improve its properties and extend its lifespan. In this work the influence on the retention of nanofibers of different anionic trash levels in the water has been evaluated. The results showed its viability as a reinforcing agent in waters with high anionic trash content, through the addition of an anionic trash catching system

Lipoteichoic acid is involved in the ability of the immunobiotic strain lactobacillus plantarum CRL1506 to modulate the intestinal antiviral innate immunity triggered by TLR3 activation Mizuno, Hiroya; Arce, Lorena Paola; Tomotsune, Kae; Albarracín, Leonardo Miguel; Funabashi, Ryutaro; Vera, María Daniela; Islam, Md Aminul; Vizoso Pinto, María Guadalupe; Takahashi, Hideki; Sasaki, Yasuko; Kitazawa, Haruki; Villena, Julio Cesar Studies have demonstrated that lipoteichoic acid (LTA) is involved in the immunomodulatory properties of some immunobiotic lactobacilli. The aim of this work was to evaluate whether LTA contributes to the capacity of Lactobacillus plantarum CRL1506 in modulating the intestinal innate antiviral immune response. A D-alanyl-lipoteichoic acid biosynthesis protein (dltD) knockout CRL1506 strain (L. plantarumΔdltD) was obtained, and its ability to modulate Toll-like receptor (TLR)-3-mediated immune response was evaluated in vitro in porcine intestinal epithelial (PIE) cells and in vivo in Balb/c mice. Wild-type (WT) CRL1506 (L. plantarum WT) was used as positive control. The challenge of PIE cells with the TLR3 agonist poly(I:C) significantly increased interferon (IFN)-β, interleukin (IL)-6, and monocyte chemoattractant protein (MCP)-1 expressions. PIE cells pretreated with L. plantarumΔdltD or L. plantarum WT showed higher levels of IFN-β while only L. plantarum WT significantly reduced the expression of IL-6 and MCP-1 when compared with poly(I:C)-treated control cells. The oral administration of L. plantarum WT to mice prior the intraperitoneal injection of poly(I:C) significantly increased IFN-β and IL-10 and reduced intraepithelial lymphocytes (CD3+NK1.1+CD8αα+) and pro-inflammatory mediators (TNF-α, IL-6, and IL-15) in the intestinal mucosa. Similar to the WT strain, L. plantarumΔdltD-treated mice showed enhanced levels of IFN-β after poly(I:C) challenge. However, treatment of mice with L. plantarumΔdltD was not able to increase IL-10 or reduce CD3+NK1.1+CD8αα+ cells, TNF-α, IL-6, or IL-15 in the intestine. These results indicate that LTA would be a key molecule in the anti-inflammatory effect induced by the CRL1506 strain in the context of TLR3-mediated inflammation.

Postglacial migration shaped the genomic diversity and global distribution of the wild ancestor of lager-brewing hybrids Langdon, Quinn K.; Peris, David; Eizaguirre, Juan Ignacio; Opulente, Dana A.; Buh, Kelly V.; Sylvester, Kayla; Jarzyna, Martin; Rodríguez, María Eugenia; Lopes, Christian Ariel; Libkind Frati, Diego; Hittinger, Chris The wild, cold-adapted parent of hybrid lager-brewing yeasts, Saccharomyces eubayanus, has a complex and understudied natural history. The exploration of this diversity can be used both to develop new brewing applications and to enlighten our understanding of the dynamics of yeast evolution in the wild. Here, we integrate whole genome sequence and phenotypic data of 200 S. eubayanus strains, the largest collection known to date. S. eubayanus has a multilayered population structure, consisting of two major populations that are further structured into six subpopulations. Four of these subpopulations are found exclusively in the Patagonian region of South America; one is found predominantly in Patagonia and sparsely in Oceania and North America; and one is specific to the Holarctic ecozone. Plant host associations differed between subpopulations and between S. eubayanus and its sister species, Saccharomyces uvarum. S. eubayanus is most abundant and genetically diverse in northern Patagonia, where some locations harbor more genetic diversity than is found outside of South America, suggesting that northern Patagonia east of the Andes was a glacial refugium for this species. All but one subpopulation shows isolation-by-distance, and gene flow between subpopulations is low. However, there are strong signals of ancient and recent outcrossing, including two admixed lineages, one that is sympatric with and one that is mostly isolated from its parental populations. Using our extensive biogeographical data, we build a robust model that predicts all known and a handful of additional regions of the globe that are climatically suitable for S. eubayanus, including Europe where host accessibility and competitive exclusion by other Saccharomyces species may explain its continued elusiveness. We conclude that this industrially relevant species has rich natural diversity with many factors contributing to its complex distribution and natural history.

Cross-Cultural Comparison of Compassion: An In-Depth Analysis of Cultural Differences in Compassion Using the Compassion of Others’ Lives (COOL) Scale Chang, Jyh Hann; Detrick, Sarah M.; Maas, Zoë; Ço?kun, Halise; Klos, María Carolina; Zeifert, Heather; Parmer, Edward; Sule, Julia Compassion has been touted as a primal element that assists in both the recognition and alleviation of another’s grief, pain, or misfortune. The purpose of this study was to evaluate the usefulness of the Compassion of Others’ Lives (COOL) Scale across cultures, as well as identify differences in compassion between individuals in the U.S., Latin America, and Turkey. Importantly, the COOL Scale was found to be sufficiently valid after being translated from English into Turkish and Spanish. The 3 groups of data collected consisted of samples from the U.S., 10 South American countries, and Turkey, respectively, with a total of 1,602 participants. A Welch ANOVA test was conducted to determine if there were significant differences at (p <.05) between the data collected from these 3 cultures. Findings concluded significant differences at (p ≤.03) for each subset; empathy (F = 27.47) and behavior alleviating suffering scores (F = 3.54) as well as the total level of compassion (5.31). Further analysis using a Games Howell Post Hoc showed where the specific differences were for empathy, alleviating suffering, and total score for each culture. The U.S. sample had a significantly higher total COOL score than the Turkish sample. Latin America scored higher for empathy than the U.S., and the U.S. scored significantly higher for empathy than Turkey.

Sexual aggression in mammals Cassini, Marcelo Hernan In non-human mammals, sexual conflict should be particularly intense because males rarely provide parental care. An expected consequence of sexual conflict is male aggression towards mates. Considering how complex measurements and interpretations of behaviours such as sexual aggression and sexual coercion are, I preferred to define operationally, as ‘sexual disturbance’, any male behaviour towards females during the pericopulatory period that can be costly for females. The objectives in this review were as follows: 1) to estimate how widespread sexual disturbance is among mammals, 2) to analyse the types of female response to sexual disturbance, and 3) to characterise the costs of sexual disturbance to females. I conducted a systematic review by searching the literature in the Web of Knowledge database using the search tools available for 19 main journals, and I conducted a qualitative review via a taxon-by-taxon analysis. Sexual disturbance was frequent in four of the 32 mammalian orders: Primates, Artiodactyla, Carnivora, and Cetacea, which all include highly polygynous taxa. The most common expression of sexual conflict around copulation is seen in behaviours associated with female retention attempts that cause minor harm. Research suggests that the most common response of females to sexual disturbance comprises female grouping around a dominant male.

Estudiantes brasileños en la Facultad de Ciencias Médicas de Rosario (Argentina): implicancias interlingüísticas; Brazilian students at the Faculty of Medical Sciences of Rosario (Argentina): interlinguistic implications Camargo Angelucci, Thalita; Pozzo, María Isabel Rita Globalmente, la migración estudiantil universitaria aumenta. En Latinoamérica, Argentina se destaca como epicentro de los intereses de extranjeros, especialmente en las carreras de Medicina. Brasil restringe el acceso a la universidad vía examen de ingreso. En los últimos años, el número de inscritos brasileños en la Facultad de Ciencias Médicas de la Universidad Nacional de Rosario (Santa Fe/Argentina) ha aumentado significativamente. Este fenómeno se presenta en la agenda de los medios de comunicación; sin embargo, los estudios académicos al respecto son escasos. Por esto, el objetivo de este estudio fue analizar las implicancias lingüísticas del fenómeno en relación a: a) la reciente política lingüística universitaria (exigencia de certificación en idioma español a ingresantes no hispanohablantes); b) la formación de comunidades lingüísticas cerradas; y c) el posicionamiento en un paradigma médico, que usa jerga propia. Partimos del marco teórico de la Sociolingüística (ROTAETXE AMUSATEGI, 1990), específicamente de las Políticas Lingüísticas (CALVET, 2007; ARNOUX, 2000), y adoptamos conceptos teórico-metodológicos del Análisis de Discurso (ORLANDI, 2015, 2011; PÊCHEUX, 1975/2016) para construir y analizar el siguiente corpus: documentos institucionales, noticias periodísticas y entrevistas semiestructuradas. De acuerdo a los tres objetivos propuestos, el análisis señala que: a) la aprobación en el examen de lengua española no garantiza el desarrollo expresivo en el contexto áulico, b) el fortalecimiento de la comunidad de brasileños interfiere en su apropiación del idioma español y c) no se constata dificultades lingüísticas sustanciales respecto a la apropiación de la jerga médica. A modo de conclusión, consideramos apremiante fortalecer las políticas lingüísticas e interculturales universitarias volcadas al acogimiento de estudiantes extranjeros, sobretodo en el campo de la formación en Medicina.; Globally, university migration increases. In Latin America, Argentina stands out as the epicenter of the interests of foreigners, especially in medical careers. Brazil restricts access to the university through an entrance examination. In recent years, the number of Brazilian students in the Faculty of Medical Sciences of the National University of Rosario has increased significantly. This phenomenon is presented in the media agenda; however, academic studies are scarce. Therefore, it is aimed to analyze the linguistic implications of this phenomenon in relation to: a) the recent university language policy (require certification in Spanish to non-Spanish speakers); b) the formation of closed linguistic communities; and c) the positioning in a medical paradigm, which uses its own jargon. The study is based on the theoretical framework of Sociolinguistics (ROTAETXE AMUSATEGI, 1990), specifically on Linguistic Policies (CALVET, 2007; ARNOUX, 2000), and on theoreticalmethodological concepts of Discourse Analysis (ORLANDI, 2015, 2011; PÊCHEUX, 1975/2016) to build and analyze the following linguistic corpus: institutional documents, online news and semi-structured interviews. According to the three proposed objectives, the analysis indicates that: a) the approval in the Spanish language test does not guarantee the expressive development in the academic context, b) the strengthening of the Brazilian community interferes with its appropriation of the Spanish language and c) there are no substantial linguistic difficulties regarding the appropriation of medical jargon. It advocates strengthening university linguistic and intercultural policies aimed at fostering foreign students, especially in the field of medical training.

Una cuña marina dominada por mareas en la base de la Formación Lecho en el extremo noroeste argentino Astini, Ricardo Alfredo; Coppa Vigliocco, Ariadna; Gomez, Fernando Javier En el marco de la discusión sobre transgresiones marinas que afectaron durante el Cretácico Tardío al noroeste argentino, se da a conocer un intervalo influenciado por mareas dentro del denominado depocentro de Tres Cruces, asociado a la cuenca del Grupo Salta. El mismo, se encuentra interpuesto entre depósitos rojos asignados indiferenciadamente al Subgrupo Pirgua y eolianitas blanquecinas reconocidas regionalmente y asignadas a la Formación Lecho. Este desarrollo estratigráfico sólo abarca el extremo noroeste argentino en la serranía de los Siete Hermanos (Yavi), próxima al límite con Bolivia, no estando registrado en los asomos ubicados a la latitud de Tres Cruces. Estratificación sigmoidal con notables pantallas de fango y acumulación de intraclastos pelíticos concentrados hacia la base de los conjuntos de estratificación cruzada, junto con facies heterolíticas rítmicas constituyen evidencias sedimentológicas diagnósticas de estructuras y estratofábricas indicativas de procesos y periodicidades mareales que asociadas con otras características estratigráficas como color, continuidad lateral y apilamiento estratigráfico permiten documentar una primera incursión marina para esta región. La localización regional de estos depósitos junto a sus características sedimentológicas y estrati-gráficas permiten interpretarlo como un registro estuarino. Esto permite, por un lado, reafirmar la presencia de transgresiones marinas influyendo durante el Cretácico en el noroeste argentino y, por el otro, especular sobre consideraciones de estratigrafía secuencial aplicadas al marco de mares someros epicontinentales. Bajo estas condiciones, un registro marino transgresivo-regresivo puede permitir discriminar y entender modificaciones paleogeograficas y ordenamientos estratigráficos en función de la disponibilidad de espacio de acumulación (acomodación) y discutir sus controles.

Direct power compensation in AC distribution networks with SCES systems via PI-PBC approach Gil González, Walter; Serra, Federico Martin; Montoya Giraldo, Oscar Danilo; Ramírez, Carlos Alberto; Orozco Henao, Cesar Here, we explore the possibility of employing proportional-integral passivity-based control (PI-PBC) to support active and reactive power in alternating current (AC) distribution networks by using a supercapacitor energy storage system. A direct power control approach is proposed by taking advantage of the Park?s reference frame transform direct and quadrature currents ( id and iq ) into active and reactive powers (p and q). Based on the open-loop Hamiltonian model of the system, we propose a closed-loop PI-PBC controller that takes advantage of Lyapunov?s stability to design a global tracking controller. Numerical simulations in MATLAB/Simulink demonstrate the efficiency and robustness of the proposed controller, especially for parametric uncertainties.

Argentina y Brasil: La alianza necesaria Merke, Mario Federico; Stuenkel, Oliver Desde el regreso de la democracia, la relación entre Argentina y Brasil nunca se percibió tan deteriorada como ahora que sufre las presiones sumadas de factores mundiales, regionales e internos. Si miramos el cuadro más amplio, el papel expansionista de China en la región y su creciente rivalidad con Estados Unidos colocan a Sudamérica en general, y a Argentina y Brasil en particular, ante un dilema que pone en riesgo la asociación estratégica. La contracción del comercio mundial y la incertidumbre que genera incrementa la aversión al riesgo en los negocios y reduce los márgenes de inserción internacional de Brasilia y Buenos Aires. El acuerdo comercial del Mercado Común del Sur (Mercosur) con la Unión Europea y otras opciones de acuerdos comerciales que se barajan abren la posibilidad de que se deteriore aún más esa relación. A este escenario se suma la inestabilidad política en Sudamérica y las reacciones dispares que genera en Argentina y Brasil en términos de cómo abordar los desafíos de la gobernanza regional. Mientras Brasil se muestra crítico del gobierno venezolano de Nicolás Maduro y distante de los foros regionales, Argentina intenta navegar por una ruta intermedia entre Maduro y Juan Guaidó, y trata de reconstruir de algún modo la concertación regional...

Lenguaje denso y apertura: Otra vindicación de la poesía como órgano del conocimiento; Dense language and opening: Another vindication of poetry as an organ of knowledge Blanco Ilari, Juan Ignacio Este trabajo se enmarca dentro de las innumerables vindicaciones de la poesía. Comienza con el desarrollo de las cuatro características del “lenguaje poético” en tanto “lenguaje denso”. La figuratividad o metaforicidad, su alusividad, la identidad forma-contenido y el realismo poético. En el segundo apartado se analizan estas características a la luz de las categorías de “significatividad” y de “interpretante”. La ontología heideggeriana y la semiótica peirceana enriquecen el concepto de lenguaje denso y aclaran su poder epistémico. Finalmente, analizo algunos aspectos que Nietzsche, en su período retórico (1869-1874), elabora sobre el lenguaje, y que prefiguran y amplían la noción de lenguaje denso. Me centro allí en la idea que todo lenguaje es, en su origen, retórica, y en el modo en que el proceso comunicativo atenta contra dicho origen. Me interesan, en particular, las nociones de “fijación”, “olvido” y “restauración”.; This work is framed within the innumerable vindications of poetry. It begins with the development of the four characteristics of “poetic language” as “dense language”. Figurativity or metaphoricity, its allusiveness, form-content identity, and poetic realism. In the second section, these characteristics are analyzed in the light of the categories of “significance” and “interpretant”. The heideggerian ontology and the peircean semiotics enrich the concept of dense language and clarify its epistemic power. Finally, I analyze some aspects that Nietzsche, is his rhetorical period (1869-1874), elaborates on language, aspects that prefigure and expand the notion of dense language. I focus there on the idea that all language is, in its origin, rhetoric, and in the way in which the communicative process attacks that origin. I am particularly interested in the notions of “fixation”, “forgetting” and “restoration”.

El acontecimiento Sanders Plot, Martin Fernando Bernie Sanders no es solamente el nombre de un candidato y dirigente político estadounidense. Bernie Sanders es el nombre de un acontecimiento —y ese acontecimiento es, además, el reverso del anverso de otro acontecimiento, uno que también tiene nombre propio y se llama Donald Trump. Ambos acontecimientos irrumpieron en la vida política norteamericana en las elecciones primarias de los partidos demócrata y republicano de 2016 y aún no han cesado de generar consecuencias de relevancia.