Latinoamérica le pone el cuerpo a la imagen

Sobre: Aquí nos vemos. Muestra fotográfica colectiva, curaduría de Adriana Lestido, Juan Travnik y Gabriel Díaz, en el Centro Cultural Kirchner, Sarmiento 151

Un viaje directo a la luna

Sobre: A moon Shaped Pool, de Radiohead. Thom York: voz y pianos, Jhonny Greenwood: guitarras, pianos y arreglos de cuerdas, Colin Greenwood: bajo eléctrico, Phil Selway: batería, Ed O`Brien: guitarras y efectos, XL records, 2016

El cine y sus nuevos horizontes

Sobre: Tangerine. Dirigida por Sean Baker. Con James Ransone, Karren Karagulian, Kiki Kitana Rodriguez,Mickey O`Hagan, Mya Taylor. Guionistas: Chris Bergoch, Sean Baker. Director de fotografía: Radium Cheung. Música: Matthew Smith

Strain Relaxation in Cu-Al-Ni Shape Memory Alloys Studied by in Situ Neutron Diffraction Experiments

In situ neutron diffraction is used to study the strain relaxation on a single crystal and other powdered Cu-Al-Ni shape memory alloys (SMAs) around martensitic transformation temperatures. This work is focused on the analysis of the strain evolution along the temperature memory effect appearing in these alloys after partial thermal transformations. A careful study of the influence of partial cycling on the neutron diffraction spectra in the martensitic phase is presented. Two different effects are observed, the d-spacing position shift and the narrowing of various diffraction peaks, along uncompleted transformation cycles during the thermal reverse martensitic transformation. These changes are associated with the relaxation of the mechanical stresses elastically stored around the martensitic variants, due to the different self-accommodating conditions after uncompleted transformations. The evolution of the stresses is measured through the strain relaxation, which is accessible by neutron diffraction. The observed effects and the measured strain relaxations are in agreement with the predictions of the model proposed to explain this behavior in previous calorimetric studies. In addition, the thermal expansion coefficients of both martensite and austenite phases were measured. The neutron experiments have allowed a complete description of the strains during martensitic transformation, and the obtained conclusions can be extrapolated to other SMA systems. (c) 2019 Author(s).This work was supported by the Spanish Ministry of Economy and Competitiveness (No. MINECO MAT2017-84069-P), as well as by the Consolidated Research Group (No. IT-1090-16) and the ELKARTEK-ACTIMAT project from the Education and Industry Departments of the Basque Government. The University of the Basque Country (UPV/EHU) also supported this work with the Research Group GIU17/071. This work has benefited from the use of NPDF at the Lujan Center at Los Alamos Neutron Science Center, funded by the Department of Energy (DOE) Office of Basic Energy Sciences. Los Alamos National Laboratory is operated by Los Alamos National Security LLC, under DOE Contract No. DE-AC52-06NA25396. The upgrade of NPDF was funded by the National Science Foundation (NSF) through Grant No. DMR 00-76488

The Influence of Thermal History on the Multistage Transformation of NiTi Shape-Memory Alloys

The multistage martensitic phase transformation of a polycrystalline NiTi shape-memory alloy (50.3 at. %Ni-49.7 at. % Ti) has been studied by means of calorimetric measurements. After a conventional thermal treatment followed by successive thermal cycles, the initial two-step forward transformation splits into four-overlapping stages. However, the reverse martensitic transformation maintains the initial two-step sequence, usually assigned to the B19'-> R -> B2 transformation. The correlation between the forward and reverse steps has been established by means of selected thermal cycles together with an estimation of their enthalpy and thermal hysteresis. These results have also provided information about the storage of the elastic strain energy and the frictional works associated with the variants' nucleation. Moreover, the study around the forward transformation temperature range by means of uncompleted thermal cycles undoubtedly shows the presence of temperature memory effects in both stages.This work has been supported by the Spanish Ministry of Economy and Competitiveness, MINECO, CONSOLIDER-INGENIO 2010 CSD2009-00013, as well as by the Consolidated Research Group IT-1090-16 and the ELKARTEK-ACTIMAT project from the Education and Industry Departments of the Basque Government. The University of the Basque Country has also supported this work with the Research Group grant: UPV/EHU GIU17/071. The authors appreciate the cooperation of J. Rodriguez-Aseguinolaza in the thermal treatments of the samples

Effects of eicosapentaenoic acid ethyl ester on visfatin and apelin in lean and overweight (cafeteria diet-fed) rats

Previous studies have demonstrated that the n-3 fatty acid EPA improves insulin resistance induced by high-fat diets. The aim of the present study was to investigate the potential role of visfatin and apelin in the insulin-sensitising effects of EPA ethyl ester. The effects of EPA on muscle and adipose GLUT mRNA, as well as on liver glucokinase (GK) and glucose-6-phosphatase (G6Pase) activity, were investigated. Male Wistar rats fed on a standard diet or a high-fat cafeteria diet were daily treated by oral administration with EPA ethyl ester (1 g/kg) for 5 weeks. A significant decrease (P,0·01) in white adipose tissue (WAT) visfatin mRNA levels was found in the cafeteria-fed rats, which was reversed by EPA administration (P,0·05). Moreover, a negative relationship was observed between homeostatic model assessment (HOMA) and the visfatin:total WAT ratio. In contrast, cafeteria-diet feeding caused a significant increase (P,0·01) in apelin mRNA in visceral WAT. EPA increased (P,0·01) apelin gene expression, and a negative relationship between HOMA index with visceral apelin mRNA and serum apelin:total WAT ratio was also observed. EPA treatment did not induce changes in skeletal muscle GLUT1, GLUT4 or insulin receptor mRNA levels. Neither liver GK and G6Pase activity nor the GK:G6Pase ratio was modified by EPA. These data suggest that somehow the insulin-sensitising effects of EPA could be related to its stimulatory action on both visfatin and apelin gene expression in visceral fat, while changes in skeletal muscle GLUT, as well as in hepatic glucose production, are not likely to be the main contributing factors in the improvement in insulin resistance induced by EPA

Experimental and Computational Studies on the Performance of Solar Trackers Under Vortex Shedding, Torsional Divergence, and Flutter

[Abstract] The current development of renewable energies has originated a number of new structural typologies that are the physical support of the energy production systems. Photovoltaic energy is a very mature source and it is obtained using rows of panels implemented in a longitudinal grillage. Many studies have been carried out in the past with an aim to improve the capacity to obtain electrical power, but another important issue is the need to guarantee the performance of these industrial facilities under the phenomena induced by the turbulent wind flow, taking into account the fact that they are usually built in wide open spaces. This paper describes an extensive research carried out on two configurations of solar trackers by experimental and computational methods. The former was composed of a number of tests of reduced models of segments of the solar trackers, which were carried out in an aerodynamic wind tunnel. The latter consisted of a series of structural analyses worked out through a finite element model of the full panel subjected to aerodynamic and aeroelastic loads. Several angles of attack of the wind flow and a wide range of wind speeds were included in the study. This approach allowed to clearly evaluate the structural and dynamic performance of both the configurations of solar trackers under the most important wind-induced phenomena such as vortex shedding, torsional divergence, and flutter. The paper relates the phases of the study and informs about the more relevant numerical results obtained in the experiments and the computer analysis

Desarrollo y Validación Clínica de un Hisopo Monolítico para Toma de Muestra Nasofaríngea en el diagnóstico de COVID-19

La empresa PS Anesthesia S.A. (PSA) solicito asesoramiento en el desarrollo de un kit para toma de muestra nasofaríngea. En mayo de 2020 comenzaron las actividades de investigación y desarrollo, que se materializaron en un hisopo nasofaríngeo prototipo integrante de un kit que contiene los insumos para la toma, recolección y transporte de muestras microbiológicas. La particularidad del hisopo nasofaríngeo desarrollado es su construcción monolítica (HNM) adaptada al proceso de moldeo por inyección, que prescinde del proceso de adhesión de microfibras para la captura de muestra.Facultad de Ingenierí

Uncontrolled donation programs after out-of-hospital cardiac arrest. An estimation of potential donors.

Objective To determine the number of potential deceased organ donors from out-of- hospital cardiac arrest cases (OHCA) attended by public physician-led emergency medical services in Spain, based on data recorded in the nationwide Spanish OHCA Registry (OHSCAR). Material and methods We analysed OHSCAR data on deceased OHCA patients in Spain during 13 months (1/10/2013 to 31/10/ 2014). Variables included age, sex, estimated OHCA time, cardiopulmonary resuscitation (CPR) start time and outcome. Inclusion criteria were: age 16–60 years, witnessed OHCA, no return of spontaneous circulation (ROSC) and time interval <15 min between OHCA occurrence and CPR initiation. Results Of a total 8789 cases, 3290 met the age criteria; of these, CPR was not witnessed in 745 cases. Among the remaining 2545 patients, 141 were included in uncontrolled donation after cardiac death (uDCD) programs, 902 arrived at the hospital with ROSC, 64 arrived with ongoing CPR and 15 cases were lost to follow-up. Of the remaining 1423 without ROSC, CPR initiation time was not recorded in 454 cases and 398 did not meet the time criteria <15 min between OHCA and CPR initiation. Finally, 571 met all the criteria and could have been potential donors. There were significant differences in the actual donors percentage from potential donors percentage between provinces with and without donor programs (141/322 = 43.8% versus 0/390 = 0%), but there were no differences in ROSC between the two types of provinces (418/1320 = 31.7% versus 652/1970 = 33.4%). Conclusions Many potential donors are missed in current clinical practice. uDCD programs are few and underused even in a country with high rates of organs transplantation.pre-print820 K

Evolution of adherence to antiretroviral treatment in a spanish hospital during 2001, 2005 and 2008

The aim of this study was to analyze the evolution of adherence to highly active antiretroviral therapy (HAART) in the Hospital General Universitario Gregorio Marañón (Madrid, Spain) over the last 8 years and determine the variables associated with the complexity of treatment and suboptimal adherence. An observational, retrospective method was used to measure adherence during the first 6 months of HAART in 3 cohorts: 2001 cohort (n = 90), 2005 cohort (n = 98), and 2008 cohort (n = 110). The adherence rate was determined using 2 methods: Pharmacy Department dispensation records and virologic response data. The evolution of the complexity of treatment and its influence on the adherence rate was analyzed by logistic regression. Adherence to HAART increased progressively from 45.6 % in 2001 to 56.1 % in 2005 and 77.3 % in 2008. Statistically significant differences were only observed between cohorts in 2005 and 2008. The average daily pill burden was 7, 4, and 4.5 tablets, respectively. The percentage of patients on twice-daily regimens decreased from 93.3 % in 2001 to 63.6 % in 2008, with a parallel increase in once-daily regimens. The proportion of patients with dietary restrictions decreased from 24.4 % to 3.6 %. A statistically significant association was found between the number of medication units per day and adherence and between frequency of administration and adherence. Adherence to HAART has improved significantly in the last 8 years. While the complexity of the treatment was significantly reduced in 2005, the largest increase in adherence occurred in the last cohort, which shows the influence of factors other than treatment simplification.Colegio de Farmacéuticos de la Provincia de Buenos Aire