Control de múltiple objetivo del motor de inducción empleando asignación de estructuras propias y algoritmos genéticos

Este trabajo se centra en el diseño de un controlador lineal mediante la estrategia de optimización de múltiple objetivo sobre una máquina de inducción modelada en el sistema de coordenadas de flujo del rotor. Los índices de desempeño seleccionados son la sensibilidad de las variables de estado de forma individual, la ganancia del controlador y la sensibilidad mixta. La técnica de control empleada es la asignación de estructuras propias; la cual posiciona los polos usando los valores y vectores propios; la optimización es realizada con el método heurístico de algoritmo genético. Se realizaron los diseños del controlador de estructuras propias más control robusto con optimización de múltiple objetivo y un solo objetivo. Los resultados de simulación y comparación muestran que la optimización de múltiple objetivo lleva a la mejora del desempeño del sistema frente a la optimización de un solo objetivo y el control robusto H∞.A linear controller is calculated by the use of a multiobjective optimization technique, and is applied over the induction machine; which is modeled in the oriented coordinate rotor flux system. The performance indexes chosen are sensitivity of state variables, closed loop gain and the mixed sensitivity. The method used is the eigenstructure assignment; in which, the objective is to determine the controller through pole placement using eigenvalues and eigenvectors; the optimization is realized by the genetic algorithms. The tests applied over the system imply the controller design in combination with the robust problem and genetic algorithms, and two cases are taken into account; one objective and multiobjective. The computational results and comparisons show that the multiobjective optimization increases the performance of the system against the one objective optimization and the H∞ controller

Renewable Energy Sources on the Change of Energy Matrix in Manabí Province

The exploitation, distribution, and consumption of energy have caused the greatest environmental pollution on the planet and accelerated climate change; even though it has been the promoter of the social, economic development of many generations. Contemporary man can continue to increase his social development, but looking for alternatives to energy development. The work shows a model of energy development that will guarantee the sustainability of social development in the areas of the province of Manabí where energy arrives with low quality and in other places does not exist. The objective of the work is to propose the diversification of the energy matrix from the gradual and progressive introduction of technologies based on the use of renewable resources that it has was distributed in the territory of the province. This result will allow the use of indigenous renewable resources, reduce environmental pollution, and improve the quality of life of populations based on the principle of energy sustainability

Phylo‐biogeographical distribution of whitefly Bemisia tabaci (Insecta: Aleyrodidae) mitotypes in Ecuador

Abstract The Bemisia tabaci complex in Ecuador was studied with respect to phylogenetic relationships and eco‐geographical distribution. Whitefly samples were collected from natural and agricultural environments in nine provinces of Ecuador (latitude, 2° N–5° S; longitude, 78°–81° W). Mitotypes were identified based on phylogenetic analysis of the 3′‐mtCOI‐tRNAleu region (832 bp) and corrected pairwise distance analysis. The distribution of mitotypes was modeled using MaxEnt, and their predicted niches were characterized according to environmental gradients. Four B. tabaci mitotypes were identified, of which three are endemic, herein ECU1–3, and the other is the introduced B mitotype. Mitotypes ECU1 (44%), ECU2 (0.74%), and ECU3 (1.47%) grouped in the American Tropics (AMTROP) species and diverged by as much as 10%, which was higher than previous estimates for the AMTROP clade of 7–8.6%. Although haplotypes of ECU1 and ECU2 are known from the American Tropics, this is the first report of the ECU3 mitotype, which may possibly be restricted to southern Ecuador. The distribution of the three ECU‐endemic mitotypes spanned the high‐altitude niches of the western slope of the Andes, rich in microclimates with variable temperature and humidity conditions. The non‐endemic B mitotype (47%) occurred only in the irrigated cropping systems located in hot and/or dry‐tropical ecological niches. Of the endemic mitotypes, ECU1 occupied the most ecological niches. Among variables contributing to ECU1 and B mitotype niche range assignments, the most significant to influence ecological range was rainfall. The B. tabaci endemic to Ecuador were more diverse with respect to mtCOI‐tRNAleu sequence than previously known, and occupied distinct microclimate niches suggestive of ecological resilience

Características Antropométricas de Triatletas amateur Chilenos: Un estudio piloto

Introducción: Las características antropométricas de los triatletas son consideradas un importante factor condicionante del rendimiento deportivo. El objetivo del presente estudio fue caracterizar el perfil antropométrico de un grupo de triatletas amateur chilenos participantes de la prueba de medio Ironman de Pucón del año 2014 según categoría. Material y Métodos: Fueron evaluados 37 triatletas varones con un promedio de edad de 29,0 años y un peso de 74,3kg. Se midieron 25 variables antropométricas. Se calculó la composición corporal en cinco componentes y el somatotipo. Se utilizó estadística descriptiva para la caracterización de los triatletas amateur chilenos. Resultados: Los resultados del fraccionamiento muestran valores medios (desviación estándar) de masa adiposa 23,9% (3,5), masa muscular 48,0% (3,4), masa residual 11,6% (8,0), masa ósea 11,3% (1,3) y masa piel 5,2% (0,3). También se observan diferencias significativas en la masa piel entre las categorías ≤24 años y ≥35 años, y presencia de un menor porcentaje de masa adiposa y mayor masa muscular en el grupo 25-34 años. En el somatotipo se presenta una dominancia meso-endomorfica, con diferencias significativas en el componente endomórfico, mayor en ≥35 años, y ectomórfico, mayor en ≤24 años. Conclusiones: Las características morfológicas de los triatletas amateur chilenos no se asemejan a la de triatletas profesionales, observándose elevados porcentajes de masa adiposa, sumatoria de 6 pliegues y endomorfía; bajo nivel de masa muscular y ósea y del componente ectomórfico, lo cual pudiese afectar su rendimiento en este tipo de pruebas

Características Antropométricas de Triatletas amateur Chilenos: Un estudio piloto

Introduction: Anthropometric characteristics of triathletes are considered an important determinant of athletic performance. The aim of this study was to characterize the anthropometric profile of a group of Chilean amateur triathletes participating of the 2014 half Ironman developed in Pucon, Chile.Material and Methods: Thirty-seven male triathletes with an average age of 29.0 years and 74.3kg were evaluated. 25 anthropometric variables were measured. The pentacompartimental body composition and somatotype were calculated. Descriptive estatistic was used to characterize Chilean amateur triathletes.Results: Fractionation results showed mean values (and standard deviation) of fat mass 23.9% (3.5), muscle 48.0% (3.4), residual mass 11.6 (8.0), bone mass 11.3 (1.3) and skin mass 5.2 (0.3). There were also significant differences in skin mass between the categories ≤24 years and ≥35 years, and presence of a lower percentage of adipose mass and greater muscle mass in the group 25-34 years. The somatotype presents a meso-endomorphic dominance, with significant differences in the endomorphic component, which was higher in ≥35 years, and ectomorphic, which was higher in ≤24 years.Conclusions: The morphological characteristics of Chilean amateur triathletes are not similar to those of professional triathletes, observing high percentages of fat mass, 6 folds sum and endomorphy; low muscle mass and bone level and reduced ectomorphy, which could affect their performance.Introducción: Las características antropométricas de los triatletas son consideradas un importante factor condicionante del rendimiento deportivo. El objetivo del presente estudio fue caracterizar el perfil antropométrico de un grupo de triatletas amateur chilenos participantes de la prueba de medio Ironman de Pucón del año 2014 según categoría.Material y Métodos: Fueron evaluados 37 triatletas varones con un promedio de edad de 29,0 años y un peso de 74,3kg. Se midieron 25 variables antropométricas. Se calculó la composición corporal en cinco componentes y el somatotipo. Se utilizó estadística descriptiva para la caracterización de los triatletas amateur chilenos.Resultados: Los resultados del fraccionamiento muestran valores medios (desviación estándar) de masa adiposa 23,9% (3,5), masa muscular 48,0% (3,4), masa residual 11,6% (8,0), masa ósea 11,3% (1,3) y masa piel 5,2% (0,3). También se observan diferencias significativas en la masa piel entre las categorías ≤24 años y ≥35 años, y presencia de un menor porcentaje de masa adiposa y mayor masa muscular en el grupo 25-34 años. En el somatotipo se presenta una dominancia meso-endomorfica, con diferencias significativas en el componente endomórfico, mayor en ≥35 años, y ectomórfico, mayor en ≤24 años.Conclusiones: Las características morfológicas de los triatletas amateur chilenos no se asemejan a la de triatletas profesionales, observándose elevados porcentajes de masa adiposa, sumatoria de 6 pliegues y endomorfía; bajo nivel de masa muscular y ósea y del componente ectomórfico, lo cual pudiese afectar su rendimiento en este tipo de pruebas

Vacunación del adulto en atención primaria: durante y después de pandemia

Immunization is one of the most important advances in medicine, achieving protection against numerous microorganisms that have put the health of the population at risk for centuries and is currently one of the main health prevention strategies; Recently, with the appearance of COVID-19, a before and after has been marked, since vaccination has regained visibility and importance after the pandemic. However, despite the available evidence, there is limited dissemination and promotion of vaccination in the adult, a situation that generates low coverage in this population. The current global context sets an urgent call to strengthen the implementation of vaccination plans and strategies not only in the pediatric population, but also in the adult population, so the objective of this narrative review is to synthesize the current recommendations for vaccination in the population. from Colombia and Latin America with a focus on primary care in the adult population. For this, a bibliographic search was carried out in the PubMed, Science direct, Redalyc, Scielo and academic Google databases; Including studies related to vaccination in adults in Colombia and Latin America, which allow to propose systematized vaccination strategies in primary care.La inmunización es uno de los avances más importantes de la medicina, logrando la protección contra numerosos microorganismos que han puesto en riesgo la salud de la población durante siglos y siendo en la actualidad una de las principales estrategias de prevención en salud; recientemente con la aparición del COVID-19 se ha marcado un antes y un después, pues a partir de la pandemia la vacunación recobró visibilidad e importancia, sin embargo, a pesar de la evidencia disponible, existe una limitada divulgación y promoción de la vacunación en el adulto, situación que genera una baja cobertura en esta población. El contexto global actual configura un llamado urgente a fortalecer la implementación de planes y estrategias de vacunación no sólo en la población pediátrica, sino también en la población adulta, por lo que el objetivo de esta revisión narrativa es sintetizar las recomendaciones actuales de vacunación en la población adulta de Colombia y América Latina con un enfoque en atención primaria en la población adulta. Para esto, se llevó a cabo una búsqueda bibliográfica en las bases de datos PubMed, Science direct, Redalyc, Scielo y Google académico; Incluyendo estudios relacionados con la vacunación en el adulto en Colombia y América Latina, los cuales permiten plantear estrategias sistematizadas de vacunación en atención primaria

Standalone vertex finding in the ATLAS muon spectrometer

A dedicated reconstruction algorithm to find decay vertices in the ATLAS muon spectrometer is presented. The algorithm searches the region just upstream of or inside the muon spectrometer volume for multi-particle vertices that originate from the decay of particles with long decay paths. The performance of the algorithm is evaluated using both a sample of simulated Higgs boson events, in which the Higgs boson decays to long-lived neutral particles that in turn decay to bbar b final states, and pp collision data at √s = 7 TeV collected with the ATLAS detector at the LHC during 2011

Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC

Measurements are presented of production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs, H →γ γ, H → Z Z∗ →4l and H →W W∗ →lνlν. The results are based on the complete pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at centre-of-mass energies of √s = 7 TeV and √s = 8 TeV, corresponding to an integrated luminosity of about 25 fb−1. Evidence for Higgs boson production through vector-boson fusion is reported. Results of combined fits probing Higgs boson couplings to fermions and bosons, as well as anomalous contributions to loop-induced production and decay modes, are presented. All measurements are consistent with expectations for the Standard Model Higgs boson

Measurement of the top quark-pair production cross section with ATLAS in pp collisions at \sqrt{s}=7\TeV

A measurement of the production cross-section for top quark pairs(\ttbar) in $pp$ collisions at \sqrt{s}=7 \TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in two different topologies: single lepton (electron $e$ or muon $\mu$) with large missing transverse energy and at least four jets, and dilepton ($ee$, $\mu\mu$ or $e\mu$) with large missing transverse energy and at least two jets. In a data sample of 2.9 pb-1, 37 candidate events are observed in the single-lepton topology and 9 events in the dilepton topology. The corresponding expected backgrounds from non-\ttbar Standard Model processes are estimated using data-driven methods and determined to be $12.2 \pm 3.9$ events and $2.5 \pm 0.6$ events, respectively. The kinematic properties of the selected events are consistent with SM \ttbar production. The inclusive top quark pair production cross-section is measured to be \sigmattbar=145 \pm 31 ^{+42}_{-27} pb where the first uncertainty is statistical and the second systematic. The measurement agrees with perturbative QCD calculations.Comment: 30 pages plus author list (50 pages total), 9 figures, 11 tables, CERN-PH number and final journal adde

Measurement of the top quark pair cross section with ATLAS in pp collisions at √s=7 TeV using final states with an electron or a muon and a hadronically decaying τ lepton

A measurement of the cross section of top quark pair production in proton-proton collisions recorded with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 7 TeV is reported. The data sample used corresponds to an integrated luminosity of 2.05 fb -1. Events with an isolated electron or muon and a τ lepton decaying hadronically are used. In addition, a large missing transverse momentum and two or more energetic jets are required. At least one of the jets must be identified as originating from a b quark. The measured cross section, σtt-=186±13(stat.)±20(syst.)±7(lumi.) pb, is in good agreement with the Standard Model prediction