25 research outputs found
Management strategy for people management in the mining sector of Venezuela, Colombia and Chile
The stages of management strategic for the management of people of the mining sector of Venezuela,
Colombia and Chile are analyzed. The research is of quantitative type, descriptive, and non-experimental
cross-sectional design. The technique of the survey through a nine-item questionnaire, is used and applied
to 55 managers, attached to each vice presidency of the companies Carbones del Guasare, SA, Carbonifero
Cerrejon and Winter mine. The technique of analysis was descriptive, variance, linear regression and of
factorial type. The results showed lack of significant differences between the stages of management
strategic, considered to be moderate. The study showed that people management strategic management
enhances sustainable competitive advantages as a distinctive feature in the real sector, becoming partner in
generator of strategic value for their competence in the 0rganization, responding to the demands of the
environment.IndexaciĂłn: Scopu
Consenso mexicano sobre detecciĂłn y tratamiento del cĂĄncer gĂĄstrico incipiente
El cĂĄncer gĂĄstrico representa una de las neoplasias mĂĄs frecuentes en el aparato
digestivo y en la mayorĂa de los casos es el resultado de la progresiĂłn de lesiones premalignas.
La detecciĂłn oportuna de estas lesiones es relevante ya que un tratamiento oportuno brinda
la posibilidad de curaciĂłn. En nuestro paĂs no existĂa un consenso respecto a la detecciĂłn temprana del cĂĄncer gĂĄstrico, por lo que la AsociaciĂłn Mexicana de GastroenterologĂa reuniĂł aun grupo de expertos y realizĂł el Consenso sobre detecciĂłn y tratamiento del cĂĄncer gĂĄstricoincipiente (CGI) para establecer recomendaciones de utilidad para la comunidad mĂ©dica. Eneste consenso se utilizĂł la metodologĂa Delphi y se emitieron 38 recomendaciones al respectodel CGI. El consenso define el CGI como aquel que al momento del diagnĂłstico se encuentralimitado a la mucosa y a la submucosa, independientemente de metĂĄstasis en ganglios linfĂĄticos.En MĂ©xico, como otras partes del mundo, los factores asociados al CGI incluyen la infecciĂłn porHelicobacter pylori, los antecedentes familiares, el tabaquismo y los factores dietĂ©ticos. Para eldiagnĂłstico se recomienda utilizar cromoendoscopia, magnificaciĂłn y equipos con luz mejorada.Un diagnĂłstico histopatolĂłgico preciso es invaluable para tomar de decisiones terapĂ©uticas. Eltratamiento endoscĂłpico del CGI, ya sea disecciĂłn o resecciĂłn de la mucosa, debe ser preferidoal manejo quirĂșrgico cuando se puedan obtener resultados semejantes en tĂ©rminos de curaciĂłnoncolĂłgica. La vigilancia endoscĂłpica se deberĂĄ de individualizar
Role of age and comorbidities in mortality of patients with infective endocarditis
Purpose: The aim of this study was to analyse the characteristics of patients with IE in three groups of age and to assess the ability of age and the Charlson Comorbidity Index (CCI) to predict mortality.
Methods: Prospective cohort study of all patients with IE included in the GAMES Spanish database between 2008 and 2015. Patients were stratified into three age groups:<65 years, 65 to 80 years, and = 80 years.The area under the receiver-operating characteristic (AUROC) curve was calculated to quantify the diagnostic accuracy of the CCI to predict mortality risk.
Results: A total of 3120 patients with IE (1327 < 65 years;1291 65-80 years;502 = 80 years) were enrolled.Fever and heart failure were the most common presentations of IE, with no differences among age groups.Patients =80 years who underwent surgery were significantly lower compared with other age groups (14.3%, 65 years; 20.5%, 65-79 years; 31.3%, =80 years). In-hospital mortality was lower in the <65-year group (20.3%, <65 years;30.1%, 65-79 years;34.7%, =80 years;p < 0.001) as well as 1-year mortality (3.2%, <65 years; 5.5%, 65-80 years;7.6%, =80 years; p = 0.003).Independent predictors of mortality were age = 80 years (hazard ratio [HR]:2.78;95% confidence interval [CI]:2.32â3.34), CCI = 3 (HR:1.62; 95% CI:1.39â1.88), and non-performed surgery (HR:1.64;95% CI:11.16â1.58).When the three age groups were compared, the AUROC curve for CCI was significantly larger for patients aged <65 years(p < 0.001) for both in-hospital and 1-year mortality.
Conclusion: There were no differences in the clinical presentation of IE between the groups. Age = 80 years, high comorbidity (measured by CCI), and non-performance of surgery were independent predictors of mortality in patients with IE.CCI could help to identify those patients with IE and surgical indication who present a lower risk of in-hospital and 1-year mortality after surgery, especially in the <65-year group
Consenso mexicano sobre probiĂłticos en gastroenterologĂa
IntroducciĂłn: El uso de los probiĂłticos es comĂșn en la prĂĄctica clĂnica. Existe un nĂșmero signi-ficativo de estudios que apoyan la eficacia de los probiĂłticos en algunos trastornos digestivos.Sin embargo, el desconocimiento de la evidencia cientĂfica y las diferentes presentaciones ycomposiciones microbianas de los probiĂłticos disponibles dificultan su prescripciĂłn.Objetivo: Proveer al clĂnico de una revisiĂłn consensuada sobre los probiĂłticos y recomendacio-nes de su uso en gastroenterologĂa.Material y mĂ©todos: Se seleccionaron los ensayos clĂnicos controlados, metaanĂĄlisis y revisio-nes sistemĂĄticas publicados hasta 2015, usando los tĂ©rminos MESH: probiotics, gastrointestinaldiseases, humans, adults and children. Se utilizĂł la metodologĂa Delphi. Diecisiete gastroente-rĂłlogos de adultos y 12 de niËnos elaboraron enunciados los cuales fueron votados hasta obteneracuerdo > 70%. Para cada enunciado se evaluĂł el nivel de evidencia basado en el sistema GRADE.Resultados y conclusiones: Se generaron 11 enunciados sobre conceptos generales de probiĂł-ticos y 27 enunciados sobre uso de probiĂłticos en enfermedades gastrointestinales tanto enniËnos como en adultos. El grupo de consenso recomienda el uso de probiĂłticos en las siguientescondiciones clĂnicas: prevenciĂłn de la diarrea asociada a antibiĂłticos, tratamiento de la diarreaaguda infecciosa, prevenciĂłn de infecciĂłn por Clostridium difficile y enterocolitis necrosante,para disminuir los eventos adversos de la terapia de erradicaciĂłn del Helicobacter pylori, elalivio de los sĂntomas del sĂndrome de intestino irritable, en el estreËnimiento funcional deladulto, para inducir y mantener la remisiĂłn en pacientes con colitis ulcerosa crĂłnica idiopĂĄticay pouchitis, y en la encefalopatĂa hepĂĄtica oculta y manifiesta.© 2016 AsociaciÂŽon Mexicana de GastroenterologŽıa. Publicado por Masson Doyma MÂŽexico S.A.Este es un artŽıculo Open Access bajo la licencia CC BY-NC-ND (http://creativecommons.org/licenses/by-nc-nd/4.0/).
ASTRACT
Introduction: Probiotics are frequently prescribed in clinical practice. Their efficacy in treatinggastrointestinal disorders is supported by a significant number of clinical trials. However, thecorrect prescription of these agents is hampered due to a lack of knowledge of the scientificevidence and to the different presentations and microbial compositions of the probiotics thatare currently available.Aim: To provide the clinician with a consensus review of probiotics and recommendations fortheir use in gastroenterology.Materials and methods: Controlled clinical trials, meta-analyses, and systematic reviewspublished up to 2015 were selected, using the MESH terms: probiotics, gastrointestinal diseases,humans, adults, AND children. The Delphi method was employed. Eighteen gastroenterologiststreating adult patients and 14 pediatric gastroenterologists formulated statements that werevoted on until agreement > 70% was reached. The level of evidence based on the GRADE systemwas evaluated for each statement.Results and conclusions: Eleven statements on the general concepts of probiotics and 27 sta-tements on the use of probiotics in gastrointestinal diseases in both adults and children wereformulated. The consensus group recommends the use of probiotics under the following clini-cal conditions: the prevention of diarrhea associated with antibiotics, the treatment of acuteinfectious diarrhea, the prevention of Clostridium difficile infection and necrotizing enteroco-litis, the reduction of adverse events from Helicobacter pylori eradication therapy, relief fromirritable bowel syndrome symptoms, the treatment of functional constipation in the adult, and the induction and maintenance of remission in patients with ulcerative colitis and pouchitis,and the treatment of covert and overt hepatic encephalopathy.© 2016 AsociaciŽon Mexicana de GastroenterologŽıa. Published by Masson Doyma MŽexico S.A. Thisis an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
SUPLEMENTO DEL XV CONGRESO INTERNACIONAL DE ACTIVIDAD FĂSICA Y DEPORTE. 17,18 y 19 DE OCTUBRE DEL 2018. ENSENADA, BAJA CALIFORNIA, MĂXICO
Compendio, en formato artĂculo, de los mejores trabajos presentados en el XV CONGRESO INTERNACIONAL DE ACTIVIDAD FĂSICA Y DEPORTE celebrado los dĂas 17,18 y 19 de octubre del 2018 en la Universidad AutĂłnoma de Baja California en la ciudad de Ensenada, Baja California, MĂ©xico:La nutriciĂłn en la actividad fĂsica y deportiva: alimentos funcionales con nanotecnologĂa, aplicaciones potenciales. GonzĂĄlez GonzĂĄlez, K.Y.; Huerta Plaza, B.A.; Amaya Parra, G. (118-130)Perfil antropomĂ©trico, fĂsico y hĂĄbitos alimentarios en escolares indĂgenas de Tijuana MĂ©xico. Avendaño Cano, D.L.; GĂłmez Miranda, L.M.; Aburto Corona, J.A. (131-142)RelaciĂłn entre el clima de aprendizaje en EducaciĂłn FĂsica y la percepciĂłn de los estudiantes en las competencias del profesorado. Baños, R; Ortiz-Camacho, M.M.; Baena-Extremera, A.; Granero-Gallegos, A.; Machado-Parra, J.P.; RenterĂa, I.; Acosta, I.; RamĂrez, L. (143-153)ValoraciĂłn de capacidades fĂsicas, composiciĂłn corporal y consumo de vitaminas en una competencia de Crossfit. Cervantes-HernĂĄndez, N.; HernĂĄndez NĂĄjera, N.; Carrasco Legleu, C.E.; Candia Lujan, R.; EnrĂquez Del Castillo, L.A. (154-164)RelaciĂłn de la actividad fĂsica, caracterĂsticas antropomĂ©tricas y VO2mĂĄx en jĂłvenes universitarios: caracterĂsticas por gĂ©nero. EnrĂquez-del Castillo, L.A.; Cervantes-HernĂĄndez, N.; Carrasco-Legleu, C.E.; Candia LujĂĄn, R. (165-174)Entrenamiento vibratorio de cuerpo completo y sus efectos sobre la composiciĂłn corporal en jĂłvenes universitarios. Flores-Chico, B.; Bañuelos-Teres, L.E.; BuendĂa Lozada, E.R.P. (175-183)ActualizaciĂłn curricular, plan 2016 de la Licenciatura en Cultura FĂsica de la BUAP. Flores-Chico, B.; Flores-Flores, A.; LĂłpez de La Rosa, LE.; Aguilar-EnrĂquez, R.I.; Caballero GĂłmez, JM; Villanueva-Huerta, JA. (184-192)EvaluaciĂłn psicolĂłgica y de la musculatura isquiosural de basquetbolistas universitarias en distintas etapas deportivas. Moranchel-Charros, R.; MartĂnez-VelĂĄzquez, E.S. (193-203)Efecto del ejercicio fĂsico sobre la fuerza, resistencia y riesgo de caĂda en mujeres adultas. Ortiz Ortiz, M; Espinoza GutiĂ©rrez, R; GĂłmez Miranda, LM.; GuzmĂĄn GutiĂ©rrez, EC.; Calleja NĂșñez, JJ. (204-212)Desigualdad vs igualdad numĂ©rica y su efecto en la tĂ©cnica de jugadores de fĂștbol infantil. Vega-Orozco, SI; Gavotto Nogales, OI; Bernal Reyes, F; Horta Gim, MA; Sarabia Sainz, HM. (213-224
Helium identification with LHCb
The identification of helium nuclei at LHCb is achieved using a method based on measurements of ionisation losses in the silicon sensors and timing measurements in the Outer Tracker drift tubes. The background from photon conversions is reduced using the RICH detectors and an isolation requirement. The method is developed using pp collision data at â(s) = 13 TeV recorded by the LHCb experiment in the years 2016 to 2018, corresponding to an integrated luminosity of 5.5 fb-1. A total of around 105 helium and antihelium candidates are identified with negligible background contamination. The helium identification efficiency is estimated to be approximately 50% with a corresponding background rejection rate of up to O(10^12). These results demonstrate the feasibility of a rich programme of measurements of QCD and astrophysics interest involving light nuclei
Momentum scale calibration of the LHCb spectrometer
For accurate determination of particle masses accurate knowledge of the momentum scale of the detectors is crucial. The procedure used to calibrate the momentum scale of the LHCb spectrometer is described and illustrated using the performance obtained with an integrated luminosity of 1.6 fb-1 collected during 2016 in pp running. The procedure uses large samples of J/Ï â ÎŒ + ÎŒ - and B+ â J/Ï K + decays and leads to a relative accuracy of 3 Ă 10-4 on the momentum scale
Curvature-bias corrections using a pseudomass method
Momentum measurements for very high momentum charged particles, such as muons from electroweak vector boson decays, are particularly susceptible to charge-dependent curvature biases that arise from misalignments of tracking detectors. Low momentum charged particles used in alignment procedures have limited sensitivity to coherent displacements of such detectors, and therefore are unable to fully constrain these misalignments to the precision necessary for studies of electroweak physics. Additional approaches are therefore required to understand and correct for these effects. In this paper the curvature biases present at the LHCb detector are studied using the pseudomass method in proton-proton collision data recorded at centre of mass energy â(s)=13 TeV during 2016, 2017 and 2018. The biases are determined using ZâÎŒ + ÎŒ - decays in intervals defined by the data-taking period, magnet polarity and muon direction. Correcting for these biases, which are typically at the 10-4 GeV-1 level, improves the ZâÎŒ + ÎŒ - mass resolution by roughly 18% and eliminates several pathological trends in the kinematic-dependence of the mean dimuon invariant mass
Aerosol composition from Tlaxcoapan, Hidalgo in central Mexico
Air quality mexican regulations about atmospheric aerosols refer to particle sizes and to the total suspended particle. None of these norms establishes the allowed values based on the particulate chemical composition. Mexican environmental legislation also considers as critical zones those with high concentration of contaminants in the atmosphere. One of these zones is the Tula-Vito-Apasco corridor where no chemical composition characterization in terms of trace metal associated to the air particulate matter has been made. Along this corridor near Tlaxcoapan there are important contaminant sources as petrochemical and electric power plants, metal-mechanical industry, limestone quarry and contaminated soils. In this work PIXE and SEM-EDS were applied to the PM10 fraction collected on filters. The trace element values thus determined were compared with those of a similar critical zone. It was found that most of the coarse particles come from limestone quarry as fugitive dusts while V, Ni, Cr and Pb values are moderately high and seems to be associated to industrial activities and contaminated soil as well