Zooarchaeological analysis of Paso Otero 4 site, Buenos Aires province, Argentina. contributions to the discussion of the Pampean Region subsistence models

El sitio Paso Otero 4 se localiza en el Partido de Necochea, en la región pampeana. Los fechados radiocarbónicos sobre materia orgánica de sedimento ubican las ocupaciones humanas entre ca. 8900 y 4600 años AP. El objetivo de este trabajo es presentar las características del conjunto faunístico de Paso Otero 4, con el fin de discutir las principales tendencias de la subsistencia de los cazadores-recolectores que ocuparon el sitio durante el Holoceno temprano y medio y contribuir con nuevos datos a la discusión de los modelos de explotación faunística propuestos para la región pampeana. Se integran y discuten los resultados de los estudios zooarqueológicos y tafonómicos, los cuales fueron evaluados en conjunto con las dinámicas ambientales inferidas para el sitio. Las diferentes líneas de evidencia indican que el mismo habría funcionado como un campamento en el cual se llevaron a cabo actividades vinculadas a las últimas etapas de producción artefactual y manutención de instrumentos líticos, así como al procesamiento y consumo de una importante cantidad de taxones; entre ellos carnívoros, aves pequeñas y grandes, artiodáctilos, roedores grandes y armadillos pequeños y grandes. En términos comparativos, en las ocupaciones más tempranas (ca. 8900 a 7700 años AP; Niveles Inferiores) se registró una mayor diversidad faunística y se infirió una estrategia de subsistencia más diversificada. Por su parte, en las ocupaciones más tardías (ca. 7700 a 4600 años AP; Niveles Superiores) la diversidad de especies es un poco más baja que en momentos previos y la estrategia de subsistencia estuvo orientada hacia la obtención de artiodáctilos.Fil: Alvarez, María Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Investigaciones Arqueologicas y Paleontologicas del Cuaternario Pampeano; ArgentinaFil: Alcaraz, Ana Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Investigaciones Arqueologicas y Paleontologicas del Cuaternario Pampeano; ArgentinaFil: Gutierrez, Maria Amelia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Investigaciones Arqueologicas y Paleontologicas del Cuaternario Pampeano; ArgentinaFil: Martinez, Gustavo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Investigaciones Arqueologicas y Paleontologicas del Cuaternario Pampeano; Argentin

Unexpected high abyssal ophiuroid diversity in polymetallic nodule fields of the Northeast Pacific Ocean, and implications for conservation

The largest and commercially appealing mineral deposits can be found in the abyssal seafloor of the Clarion-Clipperton Zone (CCZ), a polymetallic nodule province, in the NE Pacific Ocean, where experimental mining is due to take place. In anticipation of deep-sea mining impacts, it has become essential to rapidly and accurately assess biodiversity. For this reason, ophiuroid material collected during seven scientific cruises from five exploration license areas within CCZ, one area protected from mining (APEI3, Area of Particular Environmental Interest) in the periphery of CCZ and the DIS-turbance and re-COLonisation (DISCOL) Experimental Area (DEA), in the SE Pacific Ocean, was examined. Specimens were genetically analysed using a fragment of the mitochondrial cytochrome c oxidase subunit I (COI). Maximum Likelihood and Neighbour Joining trees were constructed, while four tree-based and distance-based methods of species delineation (ABGD, BINs, GMYC, mPTP) were employed to propose Secondary Species Hypotheses (SSHs) within the ophiuroids collected. The species delimitations analyses concordant results revealed the presence of 43 deep-sea brittle stars SSHs, revealing an unexpectedly high diversity and showing that the most conspicuous invertebrates in abyssal plains have been so far considerably under-estimated. The number of SSHs found in each area varied from 5 (IFREMER area) to 24 (BGR area), while 13 SSHs were represented by singletons. None of the SSHs was found to be present in all 7 areas, while the majority of species (44.2 %) had a single-area presence (19 SSHs). The most common species were Ophioleucidae sp. (Species 29), Amphioplus daleus (Species 2) and Ophiosphalma glabrum (Species 3), present in all areas except APEI3. The biodiversity patterns could be mainly attributed to POC fluxes that could explain the highest species numbers found in BGR (German contractor area) and UKSRL (UK contractor area) areas. The five exploration contract areas belong to a mesotrophic province, while in contrary the APEI3 is located in an oligotrophic province which could explain the lowest diversity as well as very low similarity with the other six study areas. Based on these results the representativeness and the appropriateness of APEI3 to meet its purpose of preserving the biodiversity of the CCZ fauna are questioned. Finally, this study provides the foundation for biogeographic and functional analyses that will provide insight into the drivers of species diversity and its role in ecosystem function

Unexpected high abyssal ophiuroid diversity in polymetallic nodule fields of the Northeast Pacific Ocean, and implications for conservation

The largest and commercially appealing mineral deposits can be found in the abyssal seafloor of the Clarion-Clipperton Zone (CCZ), a polymetallic nodule province, in the NE Pacific Ocean, where experimental mining is due to take place. In anticipation of deep-sea mining impacts, it has become essential to rapidly and accurately assess biodiversity. For this reason, ophiuroid material collected during seven scientific cruises from five exploration license areas within CCZ, one area protected from mining (APEI3, Area of Particular Environmental Interest) in the periphery of CCZ and the DIS-turbance and re-COLonisation (DISCOL) Experimental Area (DEA), in the SE Pacific Ocean, was examined. Specimens were genetically analysed using a fragment of the mitochondrial cytochrome c oxidase subunit I (COI). Maximum Likelihood and Neighbour Joining trees were constructed, while four tree-based and distance-based methods of species delineation (ABGD, BINs, GMYC, mPTP) were employed to propose Secondary Species Hypotheses (SSHs) within the ophiuroids collected. The species delimitations analyses concordant results revealed the presence of 43 deep-sea brittle stars SSHs, revealing an unexpectedly high diversity and showing that the most conspicuous invertebrates in abyssal plains have been so far considerably under-estimated. The number of SSHs found in each area varied from 5 (IFREMER area) to 24 (BGR area), while 13 SSHs were represented by singletons. None of the SSHs was found to be present in all 7 areas, while the majority of species (44.2 %) had a single-area presence (19 SSHs). The most common species were Ophioleucidae sp. (Species 29), Amphioplus daleus (Species 2) and Ophiosphalma glabrum (Species 3), present in all areas except APEI3. The biodiversity patterns could be mainly attributed to POC fluxes that could explain the highest species numbers found in BGR (German contractor area) and UKSRL (UK contractor area) areas. The five exploration contract areas belong to a mesotrophic province, while in contrary the APEI3 is located in an oligotrophic province which could explain the lowest diversity as well as very low similarity with the other six study areas. Based on these results the representativeness and the appropriateness of APEI3 to meet its purpose of preserving the biodiversity of the CCZ fauna are questioned. Finally, this study provides the foundation for biogeographic and functional analyses that will provide insight into the drivers of species diversity and its role in ecosystem function

Predicción de generación fotovoltaica con técnicas de aprendizaje supervisado

En el siguiente trabajo se realizó la predicción de la potencia generada por un conjunto de módulos fotovoltaicos ubicado en el edificio 42 del Centro Atómico Constituyentes (CAC) de la Comisión Nacional de Energía Atómica (CNEA). Se efectuó un preprocesamiento de tres años de datos de generación recolectados del inversor fotovoltaico, y posteriormente se determinó a partir de diferentes métodos de aprendizaje supervisado y su análisis, que el método con el algoritmo de Random Forest presentó el comportamiento más adecuado para realizar una predicción respecto a los datos de generación fotovoltaica reales. Una vez elegido el método de aprendizaje, se optimizaron los parámetros y se analizaron qué variables características son las más influyentes en los resultados. Finalmente se obtuvo la energía producida por el conjunto de módulos a partir de la generación predicha y se comparó con los datos reales, obteniendo coeficientes de determinación mayores a 0,9.In this work was carried out the power prediction generated by a set of photovoltaic modules located in 42´s Constituyentes Atomic Center (CAC) building of the National Atomic Energy Commission (CNEA). A preprocessing of three years of photovoltaic generation data, collected from the inverter to which the modules are connected, was conducted. Later it was determined that the method with the Random Forest algorithm presented the most suitable behavior to make a prediction regarding the real photovoltaic generation data. After choosing the learning method, parameters were optimized and analyzed to determine which characteristic variables are the most influential in the results. Finally, the energy produced by the modules was obtained from the predicted generation and it was compared with the real data, obtaining coefficients of determination greater than 0.9.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Predicción de generación fotovoltaica con técnicas de aprendizaje supervisado

En el siguiente trabajo se realizó la predicción de la potencia generada por un conjunto de módulos fotovoltaicos ubicado en el edificio 42 del Centro Atómico Constituyentes (CAC) de la Comisión Nacional de Energía Atómica (CNEA). Se efectuó un preprocesamiento de tres años de datos de generación recolectados del inversor fotovoltaico, y posteriormente se determinó a partir de diferentes métodos de aprendizaje supervisado y su análisis, que el método con el algoritmo de Random Forest presentó el comportamiento más adecuado para realizar una predicción respecto a los datos de generación fotovoltaica reales. Una vez elegido el método de aprendizaje, se optimizaron los parámetros y se analizaron qué variables características son las más influyentes en los resultados. Finalmente se obtuvo la energía producida por el conjunto de módulos a partir de la generación predicha y se comparó con los datos reales, obteniendo coeficientes de determinación mayores a 0,9.In this work was carried out the power prediction generated by a set of photovoltaic modules located in 42´s Constituyentes Atomic Center (CAC) building of the National Atomic Energy Commission (CNEA). A preprocessing of three years of photovoltaic generation data, collected from the inverter to which the modules are connected, was conducted. Later it was determined that the method with the Random Forest algorithm presented the most suitable behavior to make a prediction regarding the real photovoltaic generation data. After choosing the learning method, parameters were optimized and analyzed to determine which characteristic variables are the most influential in the results. Finally, the energy produced by the modules was obtained from the predicted generation and it was compared with the real data, obtaining coefficients of determination greater than 0.9.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Influence of eye movements on academic performance: A bibliometric and citation network analysis

Background: For many years it has been studied how eye movements influence reading and learning ability. The objective of this study is to determine the relationships between the different publications and authors. As well as to identify the different areas of research ocular movement.; Methods: Web of Science was the database for the search of publications for the period 1900 to May 2021, using the terms: “Eye movement" AND “Academic achiev*”. The analysis of the publication was performed using the CitNetExplorer, VOSviewer and CiteSpace software.; Results: 4391 publications and 11033 citation networks were found. The year with the most publications is 2018, a total of 318 publications and 10 citation networks. The most cited publication was "Saccade target selection and object recognition: evidence for a common attentional mechanism." published by Deubel et al. in 1999, with a citation index of 214. Using the Clustering function, nine groups were found that cover the main research areas in this field: neurological, age, perceptual attention, visual disturbances, sports, driving, sleep, vision therapy and academic performance.; Conclusion: Even being a multidisciplinary field of study, the topic with the most publications to date is the visual search procedure at the neurological level

“Ocupamos as ruas com estandartes, confetes e serpentinas mostrando que o Rio é nosso”: O carnaval dos blocos de rua como espaço de luta política pelo direito à cidade

A discussão sobre direito à cidade vem sendo reatualizada nos últimos anos no campo das ciências humanas. Ela também passou a fazer parte do discurso dos movimentos sociais e culturais que, além de se apropriarem do conceito teórico desenvolvido por Lefebvre e Harvey, o ressignificam, atribuindo novas e múltiplas interpretações. Atualmente, o carnaval dos blocos de rua na cidade do Rio de Janeiro está pensando na festa como espaço privilegiado de disputas na arena política. Muitos blocos, associações e coletivos carnavalescos incorporaram em seus discursos as reivindicações em torno do direito à cidade, em um processo de carnavalização da política na e pela cidade. Este artigo busca compreender qual é o entendimento que os blocos de carnaval de rua estão utilizando para construir suas próprias reivindicações em torno do direito à cidade, discutindo e reivindicando o espaço urbano e suas vivências a partir de especificidades como gênero e sexualidade.The discussion regarding the right to the city has been recently updated in the field of human sciences. It was also included in the discourse of social and cultural movements that, in addition to appropriating the theoretical concept developed by Lefebvre and Harvey, reframe it, attributing new and multiple interpretations. Nowadays, the street carnival in the city of Rio de Janeiro is seeing the party as a privileged place for disputes in the political arena. Many carnival groups, associations and collective organizations incorporated in their speeches the claims about the right to the city, in a process of carnivalization of politics in and by the city. This article seeks to understand what is the understanding that street carnival blocks are using to build their own claims around the right to the city, discussing and claiming the urban space and its experiences based on specificities such as gender and sexuality

CIDADE E POLÍTICA: DISPUTAS DE NARRATIVAS NO CARNAVAL DE RUA CARIOCA

Carnival is built through disputes, acting as a space for political claims. Recently, Rio de Janeiro's street carnival strengthens their political struggles, mainly through the discussion of the right to culture and the city. This article seeks to comprehend, by means of ethnographic research, interviews, bibliographic review and study of media reports, the political and symbolic positions of social actors in relation to the party and the city. The appropriations and resignations of such subjects around the uses of town will be analyzed. The present work will seek to understand, therefore, what are the narratives undertaken by these carnival blocks, which transform the street carnival into a significant space of political struggle. Thus, the vision of carnival as a popular festival becomes more complex. Through playfulness, this cultural manifestation creates a current and intersectional political agenda, articulating the rights to the city, to carnival and to culture.Il y a beaucoup de dispute pour la construction du Carnaval, parce que c’est un espace de revendications politiques. Ces dernières années, le carnaval de rue carioca a potentialisé les luttes politiques, principalement par la discussion sour le droit à la culture et à la ville. Dans l’article, on utilise des recherches ethnographiques, interviews, revue bibliographique et étude des reportages des médias pour essayer de comprendre les positions politiques et symboliques presentées par les acteurs sour la fête et la ville. Ainsi, on analyse les appropriations et redefinitions des usages de l'espace public effectuées par ces acteurs. Ensuite, on examine quels sont les narratifs presentés par les fêtes de rue – appelés “blocos” -, qui transforment le carnaval de rue en un espace significatif de lutte politique. Donc, la vision du carnaval devient plus complexe, parce qu’il s’agit d’une fête populaire qui, par la fantaisie, construit un agenda politique qui articule les droits à la ville, au carnaval et à la culture d’une manière actuel et intersectionnel.O carnaval é construído por meio de disputas, atuando como espaço de reivindicações políticas. Nos últimos anos, o carnaval de rua carioca vem potencializando as lutas políticas, principalmente através da discussão do direito à cultura e à cidade. Este artigo procura entender, por meio de pesquisa etnográfica, entrevistas, revisão bibliográfica e estudo de reportagens em mídias, os posicionamentos políticos e simbólicos dos agentes ativos em relação à festa e à cidade. Logo, serão analisadas as apropriações e ressignificações de tais sujeitos em torno dos usos do espaço público. A partir disso, o presente trabalho buscará compreender quais são as narrativas empreendidas por esses blocos, que transformam o carnaval de rua em um significativo espaço de luta política. Complexifica-se, assim, a visão do carnaval enquanto festa popular que, através do lúdico, constrói uma pauta política atual e interseccional, articulando os direitos à cidade, ao carnaval e à cultura

Acute Coronary Syndrome in the Older Patient

Coronary artery disease is one of the leading causes of morbidity and mortality, and its prevalence increases with age. The growing number of older patients and their differential characteristics make its management a challenge in clinical practice. The aim of this review is to summarize the state-of-the-art in diagnosis and treatment of acute coronary syndromes in this subgroup of patients. This comprises peculiarities of ST-segment elevation myocardial infarction (STEMI) management, updated evidence of non-STEMI therapeutic strategies, individualization of antiplatelet treatment (weighting ischemic and hemorrhagic risks), as well as assessment of geriatric conditions and ethical issues in decision making