Modelling wake effects using two CFD techniques

Comparativa de dos técnica de simulación de rotor: BEM (Blade Element Momentum) y MRF (Moving Reference Frame) para el perfil S809 de NRE

Functional variants of DOG1 control seed chilling responses and variation in seasonal life-history strategies in Arabidopsis thaliana.

The seasonal timing of seed germination determines a plant's realized environmental niche, and is important for adaptation to climate. The timing of seasonal germination depends on patterns of seed dormancy release or induction by cold and interacts with flowering-time variation to construct different seasonal life histories. To characterize the genetic basis and climatic associations of natural variation in seed chilling responses and associated life-history syndromes, we selected 559 fully sequenced accessions of the model annual species Arabidopsis thaliana from across a wide climate range and scored each for seed germination across a range of 13 cold stratification treatments, as well as the timing of flowering and senescence. Germination strategies varied continuously along 2 major axes: 1) Overall germination fraction and 2) induction vs. release of dormancy by cold. Natural variation in seed responses to chilling was correlated with flowering time and senescence to create a range of seasonal life-history syndromes. Genome-wide association identified several loci associated with natural variation in seed chilling responses, including a known functional polymorphism in the self-binding domain of the candidate gene DOG1. A phylogeny of DOG1 haplotypes revealed ancient divergence of these functional variants associated with periods of Pleistocene climate change, and Gradient Forest analysis showed that allele turnover of candidate SNPs was significantly associated with climate gradients. These results provide evidence that A. thaliana's germination niche and correlated life-history syndromes are shaped by past climate cycles, as well as local adaptation to contemporary climate

Burnout en médicos de atención primaria de la provincia de Cáceres

ObjetivosAnalizar el grado de desgaste profesional en médicos de atención primaria de nuestra provincia y la influencia de diversos factores.DiseñoEstudio transversal, descriptivo y analítico.EmplazamientoProvincial, atención primaria.SujetosTodos los médicos de primaria de la provincia de Cáceres (n = 255).MedicionesCuestionario autoadministrado y anónimo, Maslach Burnout Inventory, que valora: despersonalización (DP), autoestima (PA) y agotamiento emocional (AE); variables sociodemográficas, sociolaborales, preguntas personales y medidas adoptadas si hay estrés laboral. Análisis mediante t de Student y Anova (medias) y ji-cuadrado o Fisher (porcentajes).Resultados principalesUn total de 157 cuestionarios válidos (tasa de respuesta, 62%). La edad media es 41,5 ± 7,2 años; 75% varones, 80,2% casados, 73,2% propietarios, 48,9% ejercen en núcleos urbanos, presión asistencial media de 40,5 ± 16,5 pacientes/día.Los valores medios obtenidos fueron: DP, 8,3 ± 5,8; PA, 35,2 ± 8,4; AE, 22 ± 11,3; un 65,8% presentó elevadas puntuaciones en alguna de las tres.Para AE las medias fueron significativamente superiores en varón, propietario, de centro urbano, más de 10 años de antigüedad o atendía a más de 40 pacientes/día.Un 50% presentaba alteraciones psicofísicas en los 3 meses previos; el 33% soporta mucha burocracia; ambos grupos muestran medias < PA y > AE. Dedicar < 2 h/día al ocio asocia > AE y ser tutor un nivel significativamente superior de burnout. Alteraciones en la esfera familiar o sociolaboral asocian niveles elevados de DP y AE (p < 0,001).ConclusionesCoincidiendo con otros estudios, encontramos un nivel moderado de desgaste profesional en nuestros encuestados. La antigüedad, conflictividad sociolaboral y familiar, y ciertas características personales y laborales se asocian con niveles altos de desgaste.ObjectivesTo analyse the degree of professional burnout in primary care doctors from our province and the effect of various factors.DesignDescriptive and analytic cross-sectional study.SettingPrimary care (PC) in the provinceParticipantsAll the PC doctors in the province of Cáceres (n=255).Main measurements and resultsSelf-administered anonymous questionnaire: the Maslach Burnout Inventory that evaluates Depersonalisation (DP), Self-esteem (SE), and Emotional Exhaustion (EE); social and personal variables, work data, personal questions and measures taken if there was work stress. Student´s t test, ANOVA (means), and Chi-square or Fisher test (percentages) were used. 157 valid questionnaires were returned (62% response rate). Mean age was 41.5 years old±7.2; 75% were male, 80.2% married, 73.2% had tenure, 48.9% worked in towns, and their mean case-load was 40.5±16.5 patients/day. Mean values found were: DP, 8.3±5.8; SE, 35.2±8.4; EE, 22±11.3; 65.8% scored high on one of the three. For EE mean scores were significantly higher in men, doctors with tenure, in towns, those with >10 years seniority or who saw >40 patients a day. 50% had had psycho-physical disorders in the previous 3 months; 33% withstood a lot of bureaucracy; both groups had <SE and >EE averages. Dedicating <2 hours a day to leisure was associated with >EE; and being a tutor with a significantly higher level of burnout. Disorders in the family or social/work sphere were associated with high levels of DP and EE (P<.001).ConclusionsLike other studies, we found a moderate level of burnout in our sample. Seniority, social/labour or family conflict, and certain personal and job characteristics were associated with high burnout

Comparing linear and non linear wind flow models

Assessing wind conditions on complex terrain has become a hard task as terrain complexity increases. That is why there is a need to extrapolate in a reliable manner some wind parameters that determine wind farms viability such as annual average wind speed at all hub heights as well as turbulence intensities. The development of these tasks began in the early 90´s with the widely used linear model WAsP and WAsP Engineering especially designed for simple terrain with remarkable results on them but not so good on complex orographies. Simultaneously non-linearized Navier Stokes solvers have been rapidly developed in the last decade through CFD (Computational Fluid Dynamics) codes allowing simulating atmospheric boundary layer flows over steep complex terrain more accurately reducing uncertainties. This paper describes the features of these models by validating them through meteorological masts installed in a highly complex terrain. The study compares the results of the mentioned models in terms of wind speed and turbulence intensity

Functional and Biological Potential of Bioactive Compounds in Foods for the Dietary Treatment of Type 2 Diabetes Mellitus

Type 2 diabetes mellitus (T2DM), or noninsulin-dependent diabetes, is a complex disease characterized by the alteration of oxidoreductive and proinflammatory mechanisms, which leads to disorders in the insulin receptor and consequent chronic hyperglycemia. The hypoglycemic, insulinomimetic, and lipid-lowering potential of food is a reality given the advances in understanding of the role of food in nutrition. Besides its nutritional content, food exerts a biological function in the organism, and this demonstrates the importance of redirecting therapeutic strategies as well as related prevention policies of T2DM. The present review evaluates the effect of food on T2DM treatment. Particular attention is paid to the consumption of nopal, soy, and oats for their hypoglycemic functions, as well as the consumption of omega-3 fatty acids, which are associated with the control of metabolic alterations of this disease

Procesos hidrogeoquímicos en las aguas subterráneas de la cuenca de la laguna Mar Chiquita, provincia de Buenos Aires

Fil: Glok Galli, Melisa. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata; ArgentinaFil: Martínez, Daniel E.. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata; ArgentinaFil: Kruse, Eduardo Emilio. Cátedra de Hidrología General. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Lima, María Lourdes. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata; Argentin

Radiocarbon reservoir ages and hardwater effect for the northeastern coastal waters of Argentina

Accelerator mass spectrometry (AMS) radiocarbon dates were obtained for 18 mollusk shells collected alive along the Buenos Aires province coast, Argentina, over the period AD 1914-1935. Reservoir ages were estimated for all samples on the basis of the tree-ring calibration curve for the Southern Hemisphere (SHCal04, McCormac et al. 2004) and the marine ΔR values calculated as the difference between the conventional 14C age and the age deduced from the marine, mixed-layer model calculation (Marine04, Hughen et al. 2004). For most coastal locations, a great ΔR scatter was observed, ranging from 191 to 2482 yr, which is explained by the input of varying content of dissolved carbonate by rivers and groundwater ("hardwater effect") and indicates a serious limitation for shell-based 14C chronologies. Within the interior of Bahía Blanca estuary, ΔR values ranged from -40 to 50 ± 46 as a consequence of the local geological particularities of the environment. This suggests that, with some restrictions, the marine calibration curve with standard parameters (ΔR = 0) could be used at this location.Facultad de Ciencias Naturales y Muse

A real time method for surface cleanliness measurement

The measurement of surface cleanliness is a signifi cant problem in many industrial and technological processes. Existing methods are based on laboratory procedures, that are not performed in real time, can not be automated, and usually are restricted to a small portion of the sample. In this study we describe a new method for real time measurement of the amount of surface dirt or contamination deposited on a surface. It relies on the ablation of the surface dirt film by means of a short laser pulse, and the subsequent measurement of the emitted sound. The intensity of the sound is proportional to the amount of surface dirt and provides a direct measurement of the cleanli ness of the surface. We also developed a reference sample for calibration, based on a uniform distribution of dots printed on white paper. The density and the dot size can be easily modified providing a homogeneous, uniform and reproducible standard for the measurement. Based on this method, we designed, de veloped and patented the first industrial instrument for on line determination of the degree of cleanliness of manufactured cold rolled steel plate bobbins.Facultad de Ciencias Exacta

A real time method for surface cleanliness measurement

The measurement of surface cleanliness is a signifi cant problem in many industrial and technological processes. Existing methods are based on laboratory procedures, that are not performed in real time, can not be automated, and usually are restricted to a small portion of the sample. In this study we describe a new method for real time measurement of the amount of surface dirt or contamination deposited on a surface. It relies on the ablation of the surface dirt film by means of a short laser pulse, and the subsequent measurement of the emitted sound. The intensity of the sound is proportional to the amount of surface dirt and provides a direct measurement of the cleanli ness of the surface. We also developed a reference sample for calibration, based on a uniform distribution of dots printed on white paper. The density and the dot size can be easily modified providing a homogeneous, uniform and reproducible standard for the measurement. Based on this method, we designed, de veloped and patented the first industrial instrument for on line determination of the degree of cleanliness of manufactured cold rolled steel plate bobbins.Facultad de Ciencias Exacta