9,659 research outputs found

    Diagnóstico y relevamiento sobre confort higrotérmico y calidad de aire en áreas críticas del HIGA “San Martín” a partir de la utilización de los equipos de medición Hti, WeSense, Hobo e hilo caliente

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    El informe consiste en brindar información útil respecto al comportamiento higrotérmico y calidad de aire de espacios pertenecientes a áreas críticas, en este caso quirófanos, del Hospital Interzonal General de Agudos (HIGA) San Martín, ubicado en la ciudad de La Plata, provincia de Buenos Aires. El trabajo permitió identificar comportamiento de las variables medidas (temperatura, humedad relativa, concentración de CO2 en aire y cantidad de renovaciones de aire por hora) en cuatro quirófanos en relación a la ocupación (cantidad de personas en quirófano). Para efectuar las mediciones se utilizaron los siguientes equipos: Hobo ONESET MX2301A (temperatura y humedad relativa del exterior), HT-2000 (temperatura, humedad, concentración de CO2 en quirófanos), WeSense AIR (temperatura, humedad, concentración de CO2 en exterior) y anemómetro hilo caliente YK-2005AH (velocidad del aire, flujo volumétrico del aire). Se analizó tanto condición interna de los quirófanos de distintos tipos de servicios (quirófanos de guardia y de uso programado), como la condición externa del pabellón y el piso donde se encuentran las UTAs.Instituto de Investigaciones y Políticas del Ambiente Construid

    Last glacial maximum cooling of 9 °C in continental Europe from a 40 kyr-long noble gas paleothermometry record

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    International audienceThe Last Glacial Maximum (LGM; ∼26-18 kyr ago) is a time interval of great climatic interest characterized by substantial global cooling driven by radiative forcings and feedbacks associated with orbital changes, lower atmospheric CO2, and large ice sheets. However, reliable proxies of continental paleotemperatures are scarce and often qualitative, which has limited our understanding of the spatial structure of past climate changes. Here, we present a quantitative noble gas temperature (NGT) record of the last ∼40 kyr from the Albian aquifer in Eastern Paris Basin (France, ∼48°N). Our NGT data indicate that the mean annual surface temperature was ∼5 °C during the Marine Isotope Stage 3 (MIS3; ∼40-30 kyr ago), before cooling to ∼2 °C during the LGM, and warming to ∼11 °C in the Holocene, which closely matches modern ground surface temperatures in Eastern France. Combined with water stable isotope analyses, NGT data indicate δD/NGT and δ18O/NGT transfer functions of +1.6 ± 0.4‰/°C and +0.18 ± 0.04‰/°C, respectively. Our noble-gas derived LGM cooling of ∼9 °C (relative to the Holocene) is consistent with previous studies of noble gas paleothermometry in European groundwaters but larger than the low-to-mid latitude estimate of 5.8 ± 0.6 °C derived from a compilation of noble gas records, which supports the notion that continental LGM cooling was more extreme at higher latitudes. While an LGM cooling of ∼9 °C in Eastern France appears compatible with recent data assimilation studies, this value is greater than most estimates from current-generation climate model simulations of the LGM. Comparing our estimate for the temperature in Eastern France during MIS3 (6.4 ± 0.5 °C) with GCM outputs presents a promising avenue to further evaluate climate model simulations and constrain European climate evolution over the last glacial cycle

    Understanding and Exploring the Whole Set of Good Sparse Generalized Additive Models

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    In real applications, interaction between machine learning model and domain experts is critical; however, the classical machine learning paradigm that usually produces only a single model does not facilitate such interaction. Approximating and exploring the Rashomon set, i.e., the set of all near-optimal models, addresses this practical challenge by providing the user with a searchable space containing a diverse set of models from which domain experts can choose. We present a technique to efficiently and accurately approximate the Rashomon set of sparse, generalized additive models (GAMs). We present algorithms to approximate the Rashomon set of GAMs with ellipsoids for fixed support sets and use these ellipsoids to approximate Rashomon sets for many different support sets. The approximated Rashomon set serves as a cornerstone to solve practical challenges such as (1) studying the variable importance for the model class; (2) finding models under user-specified constraints (monotonicity, direct editing); (3) investigating sudden changes in the shape functions. Experiments demonstrate the fidelity of the approximated Rashomon set and its effectiveness in solving practical challenges

    A Meta-Regression Analysis to Evaluate the Effects of Narasin on Grow-Finish Pig Performance

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    A meta-regression analysis was conducted to evaluate the effects of added narasin in growing-finishing pig diets to predict the influence on average daily gain (ADG), feed efficiency (G:F), and carcass yield. A database was developed containing 21 technical reports, abstracts, and refereed papers from 2012 to 2021 representing 35 observations for growth performance data in studies ranging from 35 to 116 days in length (overall data). In addition, within these 35 observations, individual period data were evaluated (143 observations) using weekly, bi-weekly, or monthly performance intervals (period data). Regression model equations were developed, and predictor variables were assessed with a stepwise manual forward selection procedure. Important variables in predicting the response to added narasin included ADG, average daily feed intake (ADFI), and G:F of the control pigs, feeding duration (shorter or longer than 65 days) and body weight (greater than or less than 230 lb). Using median values from the database for predictor variables, the meta-analysis indicated narasin would be expected to improve ADG between 1.06 to 1.65%, G:F between 0.71 to 1.71%, and carcass yield by 0.31% when fed for longer than 65 days

    Perspectivas de pesquisa em imagem e gênero

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    O presente volume, organizado pela Linha de Pesquisa “Instituições, Discursos e Alteridade», reúne 17 contribuições, assinadas por egresses, pós-graduandes e orientadores, seja individualmente ou em co-autoria. O conjunto revela grande vitalidade intelectual. Ao mesmo tempo em que se destaca a rica pluralidade de estilos de escrita e objetos de estudo, algumas recorrências perpassam o conjunto, como: a presença de reflexões interdisciplinares, propondo interfaces entre a história da arte, a arquitetura, a antropologia e o cinema, por exemplo; a ênfase na potência e agentividade das imagens, capazes de construir visões de mundo, condensar memórias e mediar relações sociais; e análises que levam a sério a variante gênero, debruçando-se sobre mulheres artistas, discutindo representações de mulheres na arte, ou incorporando categorias como feminismo e interseccionalidade.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES
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