465 research outputs found

    LOS MAESTROS Y LA CONFORMACIÓN DE UN INVENTARIO DEL FOLKLORE NACIONAL (1920-1940)

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    Esta investigación se propone analizar la producción de conocimiento y las redes de circulación de información y objetos relacionados con los estudios folklóricos, las consideradas “tradiciones populares” y el pasado regional en la Argentina entre las décadas de 1920 y 1940. Además, se indaga en las prácticas y dispositivos promovidos desde el Consejo Nacional de Educación para la recopilación de información a través de los maestros y escuelas de diferentes lugares del país. Se trabaja con diferentes materiales, entre ellos, la Encuesta Nacional de Folklore promovida por el Consejo Nacional de Educación en 1921. La Encuesta convocaba a los maestros de las escuelas primarias nacionales, con la finalidad de recolectar, clasificar y enviar al Consejo materiales del “folklore argentino”. Esto requirió especificaciones para los maestros, reunidas en un conjunto de “Instrucciones”, las cuales establecían pautas para la selección, organización y clasificación de la información a reunir de todo aquello referido a “tradiciones populares marcadamente antiguas”. Los cuadernos y anotaciones recopilados fueron cedidos a la FFyL (UBA) y organizados en el Catálogo de la Colección de Folklore, reuniendo los legajos por provincia y por docentes. La investigación en curso busca profundizar en aquello que desde la historia de la ciencia podría definirse como las “formas burocráticas del saber” (Podgorny, 2018) y el papel de las instrucciones en la manera de inventariar colectivamente el pasado o la naturaleza de un territorio. Para ello, se focaliza en las respuestas en torno a la categoría definida como “conocimientos populares en las diversas ramas de la ciencia”, en la cual se incluyó información clasificada como “arqueológica” y “etnográfica”. El análisis de la Encuesta no solo permite el estudio de la recopilación y la posterior conformación de la “Colección de Folklore”, sino también el estudio de las concepciones sobre el “saber popular” con respecto a los llamados conocimientos científicos. Asimismo, posibilita el análisis del sistema educativo como un espacio para la realización de proyectos de recopilación de información a gran escala, desde donde era factible movilizar cantidades significativas de colaboradores distribuidos en localidades distantes (cf. García y Mayoni, 2019). Este trabajo toma como referencia los estudios contemporáneos de historia de la ciencia sobre las redes de recopilación y circulación de datos y objetos a través de diferentes tipos de instrucciones y la influencia del papel de los mediadores e intermediarios y sus efectos en la producción de saberes. Asimismo, se vincula con la llamada “ciencia ciudadana” y los estudios sobre el papel de los aficionados o amateurs en las prácticas científicas (Guillemain y Richard, 2016)

    Bifocal design procedure for dual-reflectarray antennas in offset configurations

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    This letter presents a new bifocal design procedure for dual-reflectarray antennas (DRAAs) in offset configurations. The technique starts by considering an axially symmetric geometry with the reflectarrays placed in parallel planes, which allows the rotation of a two-dimensional bifocal design around the symmetry axis. To reach a more compact configuration and to obtain smoother phase distributions, the reflectarrays are tilted and their phases are adjusted by means of a ray-tracing routine. The technique has been validated by numerical simulations through the comparison with a previous center-fed dual-reflectarray prototype. Finally, the simulations of an offset DRAA with tilted reflectarrays are presented, providing 0.56° beam spacing at 20 GHz for multispot satellite applications in Ka-band.Agencia Estatal de Investigación | Ref. TEC2016-75103-C2-1-REuropean Space Agency | Ref. 4000117113/16/NL/A

    Relationship of Body Mass Index and Footprint Morphology to the Actual Height of the Medial Longitudinal Arch of the Foot

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    [Abstract] The medial longitudinal arch height of the foot is linked to individual characteristics such as sex and body mass index, and these characteristics have been shown to be associated with conditions such as flat feet. In this cross-sectional descriptive study, we examined the medial longitudinal arch morphology in an adult population to determine if there are differences related to sex and body mass index, and values were obtained for the foot posture index. Normalized anthropometric measurements and arch indices were calculated from footprints. Groups, defined by sex and body mass index, were compared, and the correlations between body mass index and the variables were determined. In the population studied (266 women and 177 men), significant differences between men and women for the foot posture index and normalized arch measurements were found. Analysis of the variables related to body mass index indicated there were significant differences in arch indices. Significant differences and positive correlations were also found between the arch index and body mass index for the left and right feet among the men and women studied. The results obtained allow us to reflect on and analyze whether the medial longitudinal arch morphology classification methods used in the clinical and research setting are adequate or whether the influence of factors such as body mass index can generate confusion

    Effectiveness of a comprehensive care protocol in patients with new diagnoses of type 2 diabetes mellitus and associated comorbidities in primary care : study protocol of a quasi-experimental trial

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    Type 2 diabetes mellitus (T2DM) is a highly prevalent chronic disease in the Spanish population. Typically, T2DM is associated with other chronic conditions. Intensive medication at the time of diagnosis has proven effective in reducing cardiovascular risk, improving glycaemic control and preventing T2DM complications. However, it has not yet been demonstrated that a comprehensive and intensive health education protocol at the time of diagnosis has the benefits described previously. Currently, there is great variability in the practices of primary care nurses regarding health education at the time of disease diagnosis.We aimed to evaluate the effectiveness of a systematic protocol with a comprehensive care programme in people with newly diagnosed T2DM with associated comorbidities. A multicentre quasi-experimental design comparing a group of individuals taking part in the intervention (intervention group (IG)) with a similar group receiving standard diabetes care (comparison group (CG)) is planned. The intervention will take place during the 3 months after study enrolment. Data will be collected at baseline and at 3, 6 and 12 months. Ten primary care centres in Barcelona city will be selected for participation: 5 for the IG and 5 for the CG. The IG will include five structured individual visits postdiagnosis with the primary care nurse, during which aspects of diabetes education will be discussed with the patient and his/her family. The results will be measured in terms of health-related quality of life and the change in main outcomes (glycated haemoglobin and weight). The study fully met the requirements of the Ethical Committee of Clinical Investigation of the IDIAP Jordi Gol (approval code: P13/118). Patients will be informed that their data are confidential, and they have the right to withdraw at any time without penalty. Dissemination will include publishing the findings in peer-reviewed journals and sharing our findings at scientific conferences. TRIAL REGISTRATION NUMBER: NCT03990857; Pre-results

    Application of bifocal concept to dual reflectarray configurations for multi-beam satellite antennas in Ka-band

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    This contribution describes the design of a multi-beam dual reflectarray antenna for operation in transmission in Ka-band (20 GHz). The bifocal design concept has been used to obtain an improved performance for the off-axis beams with respect to the single focused antenna. The required phase-shift distributions are initially obtained with the reflectarrays in parallel planes, and then adjusted to compensate the tilting of both reflectarrays in the final Cassegrain configuration. The simulated radiation patterns in the elevation and azimuth orthogonal planes have been calculated for the two beams generated by the focuses, and then the multi-beam performance of the antenna has been evaluated

    Influence of Demographic and Lifestyle Variables on Plasma Magnesium Concentrations and Their Associations with Cardiovascular Risk Factors in a Mediterranean Population

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    Several studies have shown that a low magnesium (Mg) intake in the diet is associated with greater cardiovascular risk and greater risk of diabetes. However, the results are not consistent in all populations. To minimize the biases derived from diet measurement, more objective biomarkers of magnesium status have been proposed. Although there is still no ideal biomarker for Mg, several studies have shown that plasma Mg concentrations could be a relatively acceptable biomarker for cardiovascular risk assessment. However, further studies are required to better characterize this marker in different populations. Our aim was to analyze the association between plasma Mg concentrations (measured through inductively coupled plasma mass spectrometry (ICP-MS)) methods, and cardiovascular risk factors in individuals from a general Mediterranean population (aged 18–80 years). The influence of demographic and lifestyle variables, including adherence to the Mediterranean diet, on plasma Mg concentrations was analyzed. The mean Mg level of the population studied was 0.77 ± 0.08 mmol/L, the prevalence of hypomagnesemia (<0.70 mmol/L) being 18.6%. We did not find any statistically significant differences between plasma Mg concentrations and sex, age, tobacco smoking and total adherence to the Mediterranean diet (p > 0.05). We found a statistically significant association between plasma Mg concentrations and the prevalence of type-2 diabetes (0.77 ± 0.08 mmol/L in non-diabetics versus 0.73 ± 0.13 mmol/L in diabetics; p = 0.009). Despite the low prevalence of type-2 diabetes in this population (11.24% in subjects with hypomagnesemia versus 3.91%, in normomagnesemia; p = 0.005), hypomagnesemia was associated with greater odds of being diabetic in comparison with normomagnesemia (OR = 3.36; p = 0.016, even after adjustment for sex, age, obesity, and medications). On the other hand, no statistically significant association of plasma Mg concentrations with obesity, hypertension, fasting triglycerides, HDL-cholesterol or uric acid was found. However, in contrast to what was initially expected, a statistically significant association was found between plasma Mg concentrations (basically in the highest quartile) and greater total cholesterol (p < 0.05) and LDL-cholesterol concentrations (p < 0.05). In conclusion, our results contribute to increasing the evidence gathered by numerous studies on the inverse association between hypomagnesemia and type-2 diabetes, as well as to the observation, previously reported in some studies, of a direct association with hypercholesterolemia. This paradoxical link should be deeply investigated in further studies.This study was partially funded, by the Spanish Ministry of Health (Instituto de Salud Carlos III) and the Ministerio de Economía y Competitividad-Fondo Europeo de Desarrollo Regional (FEDER) (grants CIBER 06/03, SAF2016–80532-R); the Junta de Andalucía (AGR145 research group); the University Jaume I (grant P1–1B2013–54); the Fundació La Marató de TV3 (grant 538/U/2016) and the Generalitat Valenciana (grants PROMETEO2017/017, and APOSTD/2019/136)

    Redes internacionales de la arquitectura española : 1r Seminario AEMCI : Barcelona, 9 de julio de 2019, Escuela Técnica Superior de Arquitectura de Barcelona, ETSAB-UPC

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    Descripció del recurs: 24 gener 2020Contribucions del primer Seminario AEMCI, celebrat a l'Escola Tècnica Superior d'Arquitectura de Barcelona, el 9 de juliol de 2019, en el marc del projecte competitiu "La arquitectura española en los medios de comunicación internacionales: publicaciones, exposiciones, congresos (primera parte: 1940-1975)". Els textos recullen els avenços de les investigacions en curs que formen part del projecte HAR2017-85205-PPrimera edició

    Severe cardiac and abdominal manifestations without lung involvement in a child With COVID-19

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    Coronavirus disease 2019 (COVID-19) has become a worldwide pandemic, affecting humans of all ages. Clinical features of the pediatric population have been published, but there is not yet enough information to make a definitive description. Fever is typical, as it is respiratory symptom. Rarely are the infection and complications severe, and, when they are, it is almost always in a patient with another underlying disease. However, some otherwise healthy children with COVID-19 do suffer critical organ injury, such as acute myocarditis, heart failure and gastrointestinal inflammation. The mechanism of these organ damages remains unclear. An otherwise normally healthy 13-year-old male was admitted to the pediatric intensive care unit with acute abdomen pain, possible myocarditis and a suspected diagnosis of COVID-19. Noteworthy basal findings were ventricular extrasystoles in the electrocardiogram (EKG) and moderate left ventricular systolic dysfunction. Chest X-ray was normal. Blood tests revealed altered levels of inflammation factors (C-reactive protein (CRP), D-dimer, fibrinogen, interleukin 6 (IL-6)), lymphopenia and elevated cardiac enzymes. The first test for polymerase chain reaction (PCR) of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was negative. The patient’s condition worsened, and he entered cardiogenic shock (hypotension, tachycardia and oliguria). He was vomiting continuously, which made pain control difficult; imaging of his abdomen was undertaken. There was no response to fluid resuscitation, and so milrinone and epinephrine were administered. Empiric treatment began with azithromycin, foscarnet, carnitine and immunoglobulins. Hydroxychloroquine was given before the results of repeated SARSCoV-2 and serology tests were available. Tocilizumab was administered once COVID-19 had been confirmed and massive inflammation had been observed. Progressively the clinical situation and the levels of the parameters studied improved. The patient was discharged 8 days after admission. Most children with SARS-CoV-2 infection are asymptomatic or present only mild symptoms. However, physicians should be aware of atypical and severe manifestations that may occur in the hyperinflammatory phase of the illness
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