Real time phase-slopes calculations by correlations using FPGAs

J. Trujillo Sevilla ; M. R. Valido ; L. F. Rodríguez Ramos ; E. Boemo ; F. Rosa ; J. M. Rodríguez Ramos, “Real time phase-slopes calculations by correlations using FPGAs,” Proc. SPIE 7015, Adaptive Optics Systems, 70153B (July 11, 2008), Norbert Hubin; Claire E. Max; Peter L. Wizinowich , 7015 (Issue) 70153B, (2008). Copyright © 2008 SPIE Society of Photo‑Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.ELT laser guide star wavefront sensors are planned to handle an expected amount of data to be overwhelmingly large (1600x1600 pixels at 700 fps). According to the calculations involved, the solutions must consider to run on specialized hardware as Graphical Processing Units (GPUs) or Field Programmable Gate Arrays (FPGAs), among others. In the case of a Shack-Hartmann wavefront sensor is finally selected, the wavefront slopes can be computed using centroid or correlation algorithms. Most of the developments are designed using centroid algorithms, but precision ought to be taken in account too, and then correlation algorithms are really competitive. This paper presents an FPGA-based wavefront slope implementation, capable of handling the sensor output stream in a massively parallel approach, using a correlation algorithm previously tested and compared to the centroid algorithm. Time processing results are shown, and they demonstrate the ability of the FPGA integer arithmetic in the resolution of AO problems. The selected architecture is based in today’s commercially available FPGAs which have a very limited amount of internal memory. This limits the dimensions used in our implementation, but this also means that there is a lot of margin to move real-time algorithms from the conventionalThis work has been partially supported by “Programa Nacional de Diseño y Producción Industrial" (Project DPI 2006- 07906) of the “Ministerio de Educación y Ciencia" of the Spanish Government, and by “European Regional Development Fund" (ERDF)

An instrumental puzzle: the modular integration of AOLI

The Adaptive Optics Lucky Imager, AOLI, is an instrument developed to deliver the highest spatial resolution ever obtained in the visible, 20 mas, from ground-based telescopes. In AOLI a new philosophy of instrumental prototyping has been applied, based on the modularization of the subsystems. This modular concept offers maximum flexibility regarding the instrument, telescope or the addition of future developments.Comment: 10 pages, 8 figures, Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99082Z (August 9, 2016

Maxwell homogenization scheme for piezoelectric composites with arbitrarily-oriented spheroidal inhomogeneities

International audienc

Relación de la calidad de vida profesional y el burnout en médicos de atención primaria

ObjetivoConocer la relación, si es que la hay, entre la calidad de vida profesional (CVP) y burnout de facultativos de atención primaria.DiseñoEstudio transversal mediante cuestionario CVP-35 y MBI (Maslach Burnout Inventory), por correo postal.ÁmbitoTres centros urbanos y 3 zonas de atención rural. Participó un total de 131 profesionalesMedicionesDel CVP-35 se obtienen puntuaciones que van de 0 (mínimo) a 10 (máximo). El cuestionario Maslach clasifica en nivel alto, medio y bajo de cada dimensión.ResultadosContestó a la encuesta el 71,7%. La edad media era de 44 años y la media de tarjetas sanitarias, 1.339. El número de consultas/día fue de 37; en cuanto las visitas domiciliarias, realizaban una diaria. El valor medio de la CVP fue de 4,48 (intervalo de confianza [IC] del 95%, 4,08-4,88). La percepción de la demanda tuvo una puntuación de 5,9 (IC del 95%, 5,6-6,1); la motivación intrínseca del profesional se situó en 6,5 (IC del 95%, 6,2-6,7) y el apoyo de los directivos en 3,8 (IC del 95%, 3,6-4,1). En cuanto al cuestionario MBI, se observó una despersonalización alta en el 54,3%, cansancio emocional alto en un 56,2% y realización personal alta en el 9,3%. La correlación mayor fue entre las demandas en el puesto y el cansancio emocional (r=0,6; p<0,0001), la motivación intrínseca y la realización personal (r=0,46; p<0,0001) y la calidad de vida profesional frente al cansancio emocional (r=−0,4; p<0,0005).ConclusionesLa CVP y el burnout miden dimensiones diferentes pero relacionadas. Por tanto, su utilidad es diferente en función de los objetivos. Con estos instrumentos se pueden identificar elementos clave de la gestión de personas que pueden mejorar la calidad de vida profesional.ObjectiveTo know the relationship, if this exists, between the quality of professional life (CPL) and the burnout of primary health care staff.DesignTransversal study employing CVP-35 test and MBI (Maslach Burnout Inventory), both sent by postmail.Setting3 urban centers and 3 rural centers. Total: 131 professionals.MeasuresIn the CVP-35 test, scores from 0 (minimum) to 100 (maximum) are obtained. Maslach categorised each dimension into high, medium and low level.Results71.7% answered. Medium age 44 years, average of 1339 sanitary cards. The number of visits/day was 37, home visits 1 per day. The CVP average was 4.48 (95% CI, 4.08-4.88). The damage perception in the post 5.9 (95% CI, 5.6-6.1); the professional intrinsic motivation 6.5 (95% CI, 6.2-6.7), and the manager support 3.8 (95% CI, 3.6-4.1). MBI: high depersonalization 54.3%, emotional exhaustion (r=0.6; P<.0001), intrinsic motivation, and personal accomplishment (r=0.46; P<.0001) and profesional quality of life front emotional fatigue (r= −0.4; P<.0005).ConclusionsCPL and burnout measure different but related dimensions. Therefore, its utility is dependent on the objectives. Target elements, which can improve the quality of professional life, can be identified from these tools

High spatial resolution optical imaging of the multiple T Tauri system LkH{\alpha} 262/LkH{\alpha} 263

We report high spatial resolution i' band imaging of the multiple T Tauri system LkH$\alpha$ 262/LkH$\alpha$ 263 obtained during the first commissioning period of the Adaptive Optics Lucky Imager (AOLI) at the 4.2 m William Herschel Telescope, using its Lucky Imaging mode. AOLI images have provided photometry for each of the two components LkH$\alpha$ 263 A and B (0.41 arcsec separation) and marginal evidence for an unresolved binary or a disc in LkH$\alpha$ 262. The AOLI data combined with previously available and newly obtained optical and infrared imaging show that the three components of LkH$\alpha$ 263 are co-moving, that there is orbital motion in the AB pair, and, remarkably, that LkH$\alpha$ 262-263 is a common proper motion system with less than 1 mas/yr relative motion. We argue that this is a likely five-component gravitationally bounded system. According to BT-settl models the mass of each of the five components is close to 0.4 M$_{\odot}$ and the age is in the range 1-2 Myr. The presence of discs in some of the components offers an interesting opportunity to investigate the formation and evolution of discs in the early stages of multiple very low-mass systems. In particular, we provide tentative evidence that the disc in 263C could be coplanar with the orbit of 263AB.Comment: 11 pages, 7 figures, Accepted 2016 May

A counterfactual impact evaluation of a bilingual program on students’ grade point average at a spanish university

This observational study intends to estimate the causal effects of an English as a Medium of Instruction (EMI) program (as predictor) on students Grade Point Average (GPA) (as outcome) at a particular University in Spain by using a Counterfactual Impact Evaluation (CIE). The need to address the crucial question of causal inferences in EMI programs to produce credible evidences of successful interventions contrasts, however, with the absence of experimental or quasi-experimental research and evaluation designs in the field. CIE approach is emerging as a methodologically viable solution to bridge that gap. The program evaluated here consisted in delivering an EMI program in a Primary Education Teacher Training Degree group. After achieving balance on the observed covariates and recreating a situation that would have been expected in a randomized experiment, three matching approaches such as genetic matching, nearest neighbor matching and Coarsened Exact Matching were used to analyze observational data from a total of 1288 undergraduate students, including both treatment and control group. Results show unfavorable effects of the bilingual group treatment condition. Potential interpretations and recommendations are provided in order to strengthen future causal evidences of bilingual education programs’ effectiveness in Higher Education.This work was supported by the Junta de Andalucía-funded Proyecto de Excelencia: “Análisis y Garantía de Calidad de la Educación Superior Plurilingüe en la Educación Superior de Andalucía [Junta de Andalusia-funded Project of Excelence: Analysis and Warrantee of the Quality of Plurilingual Higher Education in Andalucia] (AGCEPESA; Grant Agreement No. P12-SEJ − 1588)

Percepción sobre las vacunas y nivel de conocimientos, actitudes y prácticas hacia la COVID-19 en adultos mayores de Lima, Perú

El objetivo fue describir la percepción sobre las vacunas y el nivel de conocimientos, actitudes y prácticas hacia la COVID-19 en adultos mayores que acuden a un hospital en Lima, Perú. Estudio descriptivo y transversal de marzo a noviembre del 2021. Se adaptó y validó un instrumento para medir el nivel de conocimientos, actitudes y prácticas, y se evaluó la percepción sobre vacunas con un cuestionario exploratorio. Se encuestaron a 83 adultos mayores, la media de edad fue 74,0 años y el 62,7% fueron mujeres. La mayoría conoce la causa y síntomas, y el 50,6% cree que puede transmitirse por alimentos contaminados. El 61,7% usa medicina tradicional para prevenirla, y el 65,4% considera insuficiente el nivel de conciencia social. El 91,5% se vacunó contra la COVID-19, y el 65,4% considera que estas vacunas son seguras. En conclusión, la mayoría de los adultos mayores presenta un alto nivel de conocimientos, actitudes y prácticas y una percepción positiva sobre la vacuna contra la COVID-19