Search results for "cop"
showing 10 items of 25502 documents
Toward farm-level health management of wind turbine systems: status and scope for improvements
2018
An outline of health management for OWFs has been detailed in this chapter with description of various important elements. The need for such farm level management is explained and benefits are discussed. Key gaps to be filled in order to realize such a system are identified. The proposed health management system is mainly based on the existing knowledge of fleet-level management in the aerospace sector. Health management is much broader than CM; there are a number of aspects beyond the prognostics capabilities that are to be designed in order to arrive at a comprehensive maintenance management scheme. A comprehensive maintenance program that is sensitive to the health of the assets and adap…
High-spectral-resolution Fabry-Pérot interferometers overcome fundamental limitations of present volcanic gas remote sensing techniques
2023
Remote sensing (RS) of volcanic gases has become a central tool for studying volcanic activity. For instance, ultraviolet (UV) skylight spectroscopy with grating spectrographs (GS) enables SO2 (and, under favourable conditions, BrO) quantification in volcanic plumes from autonomous platforms at safe distances. These measurements can serve volcanic monitoring and they cover all stages of volcanic activity in long measurement time series, which substantially contributes to the refinement of theories on volcanic degassing. Infrared (IR) remote sensing techniques are able to measure further volcanic gases (e.g., HF, HCl, CO2, CO). However, the employed Fourier transform spectrometers (FTSs) are…
Predicción del éxito y el rendimiento académico en estudiantes dominicanos de tercero de secundaria: Un modelo procesual de variables contextuales y …
2019
El estudio “Predicción del éxito y el rendimiento académico en estudiantes dominicanos de tercero de secundaria: Un modelo procesual de variables contextuales y personales”, se ha realizado con una muestra representativa de 1,712 estudiantes de los Distritos Educativos 03-04 y 11-01. Los objetivos del estudio son: a) determinar las características psicométricas de los cuestionarios del estudio; b) analizar cómo afectan al éxito y al rendimiento académico distintas variables contextuales: apoyo padres, compañeros y docentes, zona de residencia, sector educativo, calidad del centro, nivel estudio de padres, pertenencia a grupos juveniles, práctica deportiva, sexo y edad; c) analizar cómo afec…
Sport Coaches Burnout as a Threat to Professional Success, Mental Health and Well-Being
2021
The article explores motivational and personality predictors of burnout syndrome in sports coaches. The study involved 183 sports coaches of 20–63 years old (86.9% women; M=41.34±10.56 years), with professional experience for 13.83±9.98 years. Three components of professional burnout ― Emotional exhaustion, Depersonification and Reduction of professional achievements ― were measured with the adapted Maslach professional burnout inventory (Vodopyanova, et al 2008). Motivational aspects were measured with the adapted Ryan and Connell Professional Motivation inventory (Osin et al, 2017). Personal resources ― stress resistance, authenticity and coping strategies ― were measured with the adapted…
Docenti precari: resilienza e promozione del benessere
2014
In questi ultimi anni la resilienza è stata oggetto di una serie di studi e di riflessioni della comunità scientifica nazionale e internazionale, che le hanno consentito di affrancarsi dall’ambiente teorico astratto entro cui si collocava, per diventare prassi e metodologia di lavoro per tutte le professioni. Nel modello teorico adottato si definisce la resilienza come la capacità di affrontare eventi stressanti, superarli e continuare a svilupparsi aumentando le proprie risorse con una conseguente riorganizzazione positiva della vita. Con la nostra indagine ci siamo proposti di analizzare e misurare il livello di resilienza di un gruppo di 543 docenti (precari) siciliani. Abbiamo verificat…
Previsione delle prestazioni del veicolo su strada: stato dell’arte
2016
Questo lavoro contiene una rassegna dei metodi che sono usati per la previsione delle prestazioni del veicolo su strada, in dipendenza del motore installato. La prima parte mostra il calcolo delle resistenze al moto, cioè le forze che il veicolo deve vincere per avanzare sulle strade piane e in salita. Particolarmente interessante appare la parte che riguarda la resistenza aerodinamica, della quale si tratta di metodi sperimentali (galleria del vento), metodi empirici e metodi CFD. Si propone inoltre l’applicazione della norma CUNA sulla velocità per la determinazione dei consumi anche al calcolo dei coefficienti aerodinamici. La rassegna esclude la resistenza accidentale in curva perché no…
Synthesis, Electrochemistry, and Photophysics of Aza-BODIPY Porphyrin Dyes
2016
International audience; The synthesis of dyad and triad aza-BODIPY-porphyrin systems in two steps starting from an aryl-substituted aza-BODIPY chromophore is described. The properties of the resulting aza-BODIPY-porphyrin conjugates have been extensively investigated by means of electrochemistry, spectroelectrochemistry, and absorption/emission spectroscopy. Fluorescence measurements have revealed a dramatic loss of luminescence intensity, mainly due to competitive energy transfer and photoinduced electron transfer involving charge separation followed by recombination.
Aplicaciones de la Resonancia Magnética Nuclear en el estudio de la Infertilidad
2015
En los últimos años se ha producido una reducción en el número de nacimientos en muchos países, fundamentalmente europeos. Esta reducción puede ser debida a diversos factores que afecten a la fertilidad de la mujer tales como factores culturales, sociales y económicos que aumentan la edad de la mujer para concebir su primer hijo, causas inmunitarias, alteraciones del aparato reproductor femenino, causas hipotalámico-hipofisarias y factores relacionados con el estilo de vida entre otros. Estos problemas de fertilidad se pueden solucionar mediante diversos tratamientos de reproducción asistida, como la inseminación artificial o la fecundación in vitro. En estos últimos, el ovocito que se empl…
Descripción del perfil metabólico de adenomas hipofisarios mediante espectroscopia "ex-vivo", por resonancia magnética de alta resolución con rotació…
2017
INTRODUCCION La técnica experimental de espectroscopia ex¬ vivo, mediante resonancia magnética de alta resolución con rotación al ángulo mágico, utilizada en el estudio de muestras intactas de tejidos biológicos, ha demostrado ser una herramienta útil para la obtención de datos relevantes acerca de su perfil metabólico. Como ejemplo, su aplicación al estudio de tumores gliales del sistema nervioso central, se ha trasladado a la clínica diaria y tiene un papel relevante en el manejo y toma de decisiones terapéuticas. Los adenomas hipofisarios son tumores frecuentes, con características biológicas que hacen de su diagnóstico y manejo una tarea compleja que requiere un abordaje multidisciplina…
Study of the thermochromic phase transition in CuMo1−xWxO4 solid solutions at the W L3-edge by resonant X-ray emission spectroscopy
2021
This is the peer reviewed version of the following article: I. Pudza, A. Kalinko, A. Cintins, A. Kuzmin, Acta Mater. 205 (2021) 116581, which has been published in final form at https://www.sciencedirect.com/science/article/abs/pii/S1359645420310181 This article may be used for non-commercial purposes in accordance with Elsevier Terrms and Conditions for Self-Archiving.