Inspección de subestaciones eléctricas: YOLOv5 en la identificación de puntos calientes mediante imágenes térmicas

Substations are key facilities within an electrical system, untimely failures tend to cause low quality and negative effects on the electrical supply. An early indicator of potential electrical equipment failure is the appearance of hot spots; therefore, its detection and subsequent programmed correction avoids incurring in major failures and unnecessary operation stops. In this research, 64 experiments of the YOLOv5 algorithm were carried out, with the purpose of proposing an automated computer vision mechanism for the detection of hot spots in thermal images of electrical substations. The best results show a mAP value of 81.99%, which were obtained with the YOLOv5m algorithm and the transfer learning application. These results leave a basis to deepen and improve the performance of the algorithm by varying other hyperparameters to those considered in this study.Las subestaciones son instalaciones clave dentro de un sistema eléctrico; las fallas intempestivas tienden a causar baja calidad y efectos negativos del suministro eléctrico. Un indicador temprano de posibles fallas en los equipos eléctricos es la aparición de puntos calientes; por lo que su detección y posterior corrección programada evita incurrir en fallas mayores y paradas de operación innecesarias. En esta investigación se realizaron 64 experimentos del algoritmo YOLOv5, con la finalidad de proponer un mecanismo automatizado de visión por computadora para la detección de puntos calientes en imágenes térmicas de subestaciones eléctricas. Los mejores resultados muestran un valor mAP de 81,99 %, los cuales se obtuvieron con el algoritmo YOLOv5m y la aplicación de transfer learning. Estos resultados dejan una base para profundizar y mejorar el desempeño del algoritmo, variando otros hiperparámetros a los considerados en el presente estudio

The Dark Side of the Self-Determination Theory and Its Influence on the Emotional and Cognitive Processes of Students in Physical Education

Amongst the main objectives of physical education (PE) classes is the consolidation of healthy lifestyle habits in young people and adolescents. Nonetheless, these classes can also provide the basis from which adverse experiences are generated which affect students’ perceptions of these classes. Previously conducted studies have focused on motivational processes and not on emotional processes, nor on the way in which students learn. The objective of the present study was to explore the dark side of the self-determination theory, its influence on emotional intelligence and the meta-cognitive strategies of students. Methodology: A total of 1602 young people undertaking secondary education participated, with self-reported ages between 13 and 19 years. The following questionnaires were utilized: Controlling Coach Behaviors Scale, Frustration of Psychological Needs in PE classes Scale, Emotional Intelligence in PE Scale and Motivated Strategies for Learning Questionnaire. A structural equation model was developed which explained causal associations between the study variables. Results: Psychological control positively predicted each one of the sub-factors of frustration of psychological needs. Frustration of psychological needs negatively predicted emotional intelligence. Finally, emotional intelligence positively predicted meta-cognitive thinking. Conclusions: The influence and importance of the teaching style adopted by teachers is indicated, in addition to the effect of students’ psychological experiences on emotions and learning strategie

Influence of Quaternary Benzophenantridine and Protopine Alkaloids on Growth Performance, Dietary Energy, Carcass Traits, Visceral Mass, and Rumen Health in Finishing Ewes under Conditions of Severe Temperature-humidity Index.

Twenty Pelibuey×Katahdin ewes (35±2.3 kg) were used to determine the effects of the consumption of standardized plant extract containing a mixture of quaternary benzophenanthridine alkaloids and protopine alkaloids (QBA+PA) on growth performance, dietary energetics, visceral mass, and ruminal epithelial health in heat-stressed ewes fed with a high-energy corn-based diet. The basal diet (13.9% crude protein and 2.09 Mcal of net energy [NE] of maintenance/kg of dry matter) contained 49.7% starch and 15.3% neutral detergent fiber. Source of QBA+PA was Sangrovit RS (SANG) which contains 3 g of quaternary benzophenathridine and protopine alkaloids per kg of product. Treatments consisted of a daily consumption of 0 or 0.5 g SANG/ewe. Ewes were grouped by weight and assigned to 10 pens (5 pens/treatment), with two ewes per pen. The experimental period lasted 70 days. The mean temperature humidity index during the course of this experiment was 81.7±1.0 (severe heat stress). There were no treatment effects on water intake. Dry matter intake was not affected (p = 0.70) by treatments, but the group fed SANG had a numerically (11.2%) higher gain in comparison to the control group, SANG improved gain efficiency (8.3%, p = 0.04), dietary NE (5.2%, p<0.01) and the observed-to-expected NE (5.9%, p<0.01). Supplemental SANG did not affect (p≥0.12) carcass characteristics, chemical composition of shoulder, and organ weights (g/kg empty body weight) of stomach complex, intestines, and heart/lung. Supplemental SANG decreased liver weight (10.3%, p = 0.02) and increased visceral fat (16.9%, p = 0.02). Rumen epithelium of ewes fed SANG had lower scores for cellular dropsical degeneration (2.08 vs 2.34, p = 0.02), parakeratosis (1.30 vs 1.82, p = 0.03) and neutrophil infiltration (2.08 vs 2.86, p = 0.05) than controls. It is concluded that SANG supplementation helped ameliorate the negative effects of severe heat on growth performance of feedlot ewes fed high-energy corn-based diets. Improvement in energetic efficiency may have been mediated, in part, by anti-inflammatory effects of supplemental SANG and corresponding enhancement of nutrient uptake

Top couplings and top partners

5th International Workshop on Top Quark Physics (TOP2012). Winchester (U.K.) september 16-21, 2012.We review the model-independent description of the couplings of the top quark to the Higgs and gauge bosons in theories beyond the Standard Model. Then we examine these couplings in the case of arbitrary heavy vector-like quarks mixing with the third family. We also discuss the couplings of these top partners, and comment on implications for LHC searches.This work has been supported by the MICINN project FPA2010-17915

Actual treatment of attention deficit hyperactivity disorder (ADHD)

El tratamiento del trastorno por défi cit de atención e hiperactividad (TDAH) incluye intervenciones farmacológicas, psicosociales y educativas, y en él se aconseja un diseño personalizado teniendo en cuenta las características del paciente, el tipo de trastorno y la comorbilidad que lo acompaña. Los fármacos de primera línea son el psicoestimulante metilfenidato (MTF) y atomoxetina (ATX), un simpaticomimético de acción central no estimulante. Ambos reducen las manifestaciones clínicas de inquietud, inatención e impulsividad, mejorando la calidad de las relaciones sociales y el rendimiento académico. Metilfenidato bloquea el transportador presináptico de dopamina (DA) y noradrenalina (NA), aumentando la concentración de estos neurotransmisores en el espacio presináptico neuronal. Se presenta en formas de liberación inmediata (LI) (Rubifen® y Medicebran® en preparados de acción prolongada con tecnología OROS® [osmotic controlled-release oral delivery system], Concerta® y Metilfenidato Sandoz®) y en pellets (Medikinet®), que permiten seleccionar adecuadamente la dosis y la pauta posológica. Las formas de LI pueden inducir efecto rebote al provocar un pico plasmático elevado que decae en poco tiempo. Atomoxetina (Strattera®) es un inhibidor muy selectivo y potente del transportador presináptico de NA; aumenta los niveles de NA y DA en la corteza prefrontal, pero no en las regiones corticales relacionadas con el desarrollo de tics o riesgo de abusos de sustancias. Puede ser la alternativa a MTF cuando éste pierde efi cacia o está contraindicado. La efectividad de ambos fármacos debe considerarse a partir de las 2-4 semanas. Sus reacciones adversas son numerosas y con frecuencia causan malestar, lo que difi culta la adherencia. Por ello es necesario el seguimiento de estos pacientes, y el farmacéutico puede ejercer un papel destacado para mejorar el cumplimiento y los efectos de la farmacoterapiaTreatment of attention defi cit hyperactivity disorder (ADHD) includes pharmacological, psychosocial and educational interventions. A custom designed treatment taking into account patient characteristics, type of disorder and comorbidity must be advisable. First election drugs are the psychostimulant methylphenidate (MTF) and the sympathomimetic not stimulant atomoxetine (ATX). These drugs reduce the clinical manifestations of restlessness, inattention and impulsivity, improving the quality of social relationships and academic performance. MTF blocks the presynaptic dopamine (DA) and norepinephrine (NA) transporters increasing the concentration of these neurotransmitters in the presynaptic neuron. Both of them are available in the pharmaceutical forms of immediate release (IR) (Rubifen ® and Medicebran®, prolonged acting preparations with OROS® [osmotic controlled-release oral delivery system] technology, Con certa® and Metilfenidato Sandoz®) and pellets (Medikinet®), allowing a proper selection of dosage pattern. IR pharmaceutical forms can induce rebounding effect by causing high plasma peak that decays quickly. ATX is a highly selective and a potent inhibitor of presynaptic NA transporter, increasing levels of NA and DA in the prefrontal cortex, but not in cortical regions related to the development of tics or risk of substance abuse. It can be an alternative to MTF when this loses effectiveness or is contraindicated. The effectiveness of both drugs must be considered after 2 to 4 weeks of treatment. Their side effects are numerous and often cause discomfort making diffi cult adherence. Therefore it is necessary to monitor these patients playing pharmacist a leading role in improving the performance and the effects of pharmacotherap

Inspección de subestaciones eléctricas: YOLOv5 en la identificación de puntos calientes mediante imágenes térmicas

Las subestaciones son instalaciones clave dentro de un sistema eléctrico; las fallas intempestivas tienden a causar baja calidad y efectos negativos del suministro eléctrico. Un indicador temprano de posibles fallas en los equipos eléctricos es la aparición de puntos calientes; por lo que su detección y posterior corrección programada evita incurrir en fallas mayores y paradas de operación innecesarias. En esta investigación se realizaron 64 experimentos del algoritmo YOLOv5, con la finalidad de proponer un mecanismo automatizado de visión por computadora para la detección de puntos calientes en imágenes térmicas de subestaciones eléctricas. Los mejores resultados muestran un valor mAP de 81,99 %, los cuales se obtuvieron con el algoritmo YOLOv5m y la aplicación de transfer learning. Estos resultados dejan una base para profundizar y mejorar el desempeño del algoritmo, variando otros hiperparámetros a los considerados en el presente estudio

Microbial weathering of Fe-rich phyllosilicates and formation of pyrite in the dolomite precipitating environment of a Miocene lacustrine system

Sedimentary sequences composed of selenite gypsum, mudstone, and dolomite microbialites cropping out in the eastern part of the Madrid Basin were deposited in a mudflat – saline-lake system during the Miocene. In some dolomite beds enriched in detrital grains, dolomite crystals occur intergrown with framboidal pyrite clusters that in many cases are arranged along the associated phyllosilicate cleavages, which accounts for the mineral disaggregation, and eventually for the mineral replacement. Highresolution FE-SEM investigations across the interface between the pyrite and the phyllosilicate show that a single phyllosilicate is replaced by iron sulphides in different microsites, with retention of some aspects of the parent structure. Pyrite formed in the sediment as texturally complex framboids, coexisting with amorphous to poorly crystalline iron-rich sulphide phases, and include carbonaceous filaments with biogenic isotopic signatures (δ 13 C = -22.95 ‰). Microprobe analytical data indicate the weathered phyllosilicates to be significantly depleted in Fe relative to Si and Al. The selective release of Fe has not involved the mineral transformation to secondary phyllosilicates, which suggests a preferential microbial colonization of the Fe-bearing minerals rather than a thermodynamically driven degradation of those minerals. Depleted δ 34 S values in pyrite further suggest that sulphate microbial reduction to sulphide was active within the sediment during the alteration of the silicates. This paper gives new insight into the microbial weathering of phyllosilicates and the subsequent formation of pyrite through a sequence of intermediate products enriched in iron. These processes were coeval with the microbially-mediated precipitation of dolomite, which further reinforces the role of the microbes in the formation of the sulphides