80 research outputs found

    Aumento de la mortalidad de la mosca de la fruta en la producción de chirimoya mediante tratamiento de irradiación de Co_60 en Laboratorio de SENASA Piura 2018

    Get PDF
    Las Moscas de la fruta en especial “Ceratitis capitata Wiedemann” es una de las plagas más dañinas que existe, ataca a las diferentes producciones frutícolas y de hortalizas originando así la principal restricción fitosanitaria para poder exportar estos productos que son de mucha importancia para la economía de nuestros agricultores y del país. La OIEA (Organismo Internacional de Energía Atómica) dentro del proyecto RLA/5/043 (ARCAL XXXIII). “Reglamento Cuarentenario Armonizado para la Irradiación de Frutas Frescas” con la participación de Cuba, Argentina, Brasil, Chile, Venezuela, México y Perú, es que inician investigaciones para demostrar la eficacia, viabilidad y poder así validar la irradiación como tratamiento cuarentenario. Perú inicia estas actividades con el IPEN (Instituto Peruano de Energía Nuclear), así mismo teniendo la posibilidad de realizar un ensayo es que se abre paso para realizar esta investigación en la Unidad de los Centro de Producción de Moscas de la Fruta de SENASA (Servicio Nacional d Sanidad Agraria) Piura, supervisado por el especialista Ing. Félix Quenta Cherre. El Trabajo de investigación consistió en 2 etapas: la primera consistió en determinar la dosis mínima efectiva de irradiación de Co_60 a la cual no existiera sobrevivencia de los estados inmaduros por consiguiente no hubiera emergencia de mosca adulta de la plaga de moscas de la fruta, la segunda que consistió en la evaluación de los frutos de chirimoya infestados artificialmente con larvas de moscas de la fruta a la dosis minina encontrada la cual nos proporciona datos confiables, confirmándose que a 100 Gy (0,1kGy) no hay emergencia de mosca adulta; la evaluación organoléptica determinó que no existe diferencia significativa frente a las chirimoyas que no fueron tratados con este procedimiento

    Satisfacción y desempeño laboral en los servidores administrativos de una entidad pública de Piura-2022

    Get PDF
    La presente tesis se ejecutó con el objetivo de determinar la relación entre la satisfacción y el desempeño laboral de los servidores administrativos de una entidad pública de Piura-2022, asimismo se plateo como hipótesis general, existe relación entre la satisfacción y el desempeño laboral de los servidores administrativos. El tipo de investigación fue de tipo básica, cuantitativa de alcance temporal con un diseño No Experimental, de carácter correlacional; la población y muestra estuvo constituida por 129 servidores de una entidad pública de Piura, estuvo enmarcada de un muestreo no probabilístico. Para la recolección de información se utilizaron como técnicas a la encuesta y como instrumentos dos cuestionarios con escala Likert, referente a las variables satisfacción laboral (20 ítems) y desempeño laboral (20 ítems), los cuales fueron validados por juicio de expertos. Según los resultados obtenidos, existe relación significativa alta (coeficiente de Pearson = 0,618) entre la dimensión condiciones de trabajo de la satisfacción laboral y el desempeño laboral; de la misma manera, existe relación significativa moderada (coeficiente de Pearson = 0,542) entre la dimensión reconocimiento personal y/o social de la satisfacción laboral y el desempeño laboral; y, por último, existe relación significativa alta (coeficiente de Pearson = 0,639) entre la dimensión beneficios económicos de la satisfacción laboral y el desempeño laboral. En conclusión, existe relación significativa Alta (coeficiente de Pearson = 0,702) entre la satisfacción laboral y el desempeño laboral de los servidores administrativos de una entidad pública de Piura. Con dichos resultados se acepta la hipótesis alterna (H1) y se rechaza la hipótesis nula (H0)

    Bose-Einstein correlations of charged hadrons in proton-proton collisions at s\sqrt s = 13 TeV

    Get PDF
    Bose-Einstein correlations of charged hadrons are measured over a broad multiplicity range, from a few particles up to about 250 reconstructed charged hadrons in proton-proton collisions at s \sqrt{s} = 13 TeV. The results are based on data collected using the CMS detector at the LHC during runs with a special low-pileup configuration. Three analysis techniques with different degrees of dependence on simulations are used to remove the non-Bose-Einstein background from the correlation functions. All three methods give consistent results. The measured lengths of homogeneity are studied as functions of particle multiplicity as well as average pair transverse momentum and mass. The results are compared with data from both CMS and ATLAS at s \sqrt{s} = 7 TeV, as well as with theoretical predictions.[graphic not available: see fulltext]Bose-Einstein correlations of charged hadrons are measured over a broad multiplicity range, from a few particles up to about 250 reconstructed charged hadrons in proton-proton collisions at s=\sqrt{s} = 13 TeV. The results are based on data collected using the CMS detector at the LHC during runs with a special low-pileup configuration. Three analysis techniques with different degrees of dependence on simulations are used to remove the non-Bose-Einstein background from the correlation functions. All three methods give consistent results. The measured lengths of homogeneity are studied as functions of particle multiplicity as well as average pair transverse momentum and mass. The results are compared with data from both CMS and ATLAS at s=\sqrt{s} = 7 TeV, as well as with theoretical predictions

    Search for an L-mu - L-tau gauge boson using Z -> 4 mu events in proton-proton collisions at root s=13 TeV

    Get PDF
    A search for a narrow Z' gauge boson with a mass between 5 and 70 GeV resulting from an L-mu - L-tau U (1) local gauge symmetry is reported. Theories that predict such a particle have been proposed as an explanation of various experimental discrepancies, including the lack of a dark matter signal in direct-detection experiments, tension in the measurement of the anomalous magnetic moment of the muon, and reports of possible lepton flavor universality violation in B meson decays. A data sample of proton-proton collisions at a center-of-mass energy of 13 TeV is used, corresponding to an integrated luminosity of 77.3 fb(-1) recorded in 2016 and 2017 by the CMS detector at the LHC. Events containing four muons with an invariant mass near the standard model Z boson mass are analyzed, and the selection is further optimized to be sensitive to the events that may contain Z -> Z'mu mu -> 4 mu decays. The event yields are consistent with the standard model predictions. Upper limits of 10(-8)-10(-7) at 95% confidence level are set on the product of branching fractions B(Z -> Z'mu mu)B(Z' -> mu mu), depending on the Z' mass, which excludes a Z' boson coupling strength to muons above 0.004-0.3. These are the first dedicated limits on L-mu - L-tau models at the LHC and result in a significant increase in the excluded model parameter space. The results of this search may also be used to constrain the coupling strength of any light Z' gauge boson to muons. (C) 2019 The Author(s). Published by Elsevier B.V.Peer reviewe

    Studies of Beauty Suppression via Nonprompt D-0 Mesons in Pb-Pb Collisions at root s(NN)=5.02 TeV

    Get PDF
    The transverse momentum spectra of D-0 mesons from b hadron decays are measured at midrapidity (vertical bar y vertical bar D-0 yield is found to be suppressed in the measured p(T) range from 2 to 100 GeV/c as compared to pp collisions. The suppression is weaker than that of prompt D-0 mesons and charged hadrons for p(T) around 10 GeV/c. While theoretical calculations incorporating partonic energy loss in the quark-gluon plasma can successfully describe the measured B -> D-0 suppression at higher p(T), the data show an indication of larger suppression than the model predictions in the range of 2 <p(T) <5 GeV/c.Peer reviewe

    Observation of the χb1(3P)\chi_{b1}(3P) and χb2(3P)\chi_{b2}(3P) and measurement of their masses

    Get PDF
    The χb1(3P)\chi_{b1}(3P) and χb2(3P)\chi_{b2}(3P) states are observed through their γ(3S)γ\gamma(3S)_\gamma decays, using an event sample of proton-proton collisions collected by the CMS experiment at the CERN LHC. The data were collected at a center-of-mass energy of 13 TeV and correspond to an integrated luminosity of 80.0  fb180.0  fb^{−1}. Theγ(3S)\gamma(3S) mesons are identified through their dimuon decay channel, while the low-energy photons are detected after converting to e+ee^+e ^− pairs in the silicon tracker, leading to a χb1(3P)\chi_{b1}(3P) mass resolution of 2.2 MeV. This is the first time that the J=1 and 2 states are well resolved and their masses individually measured: 10513.42±0.41(stat)±0.18(syst)  MeV10513.42±0.41(stat)±0.18(syst)  MeV and 10524.02±0.57(stat)±0.18(syst)  MeV10524.02±0.57(stat)±0.18(syst)  MeV; they are determined with respect to the world-average value of the γ(3S)\gamma(3S) mass, which has an uncertainty of 0.5 MeV. The mass splitting is measured to be 10.60±0.64(stat)±0.17(syst)  MeV10.60±0.64(stat)±0.17(syst)  MeV

    Search for single production of vector-like quarks decaying into Wb in pp collisions at s=8\sqrt{s} = 8 TeV with the ATLAS detector

    Get PDF

    Measurement of the W boson polarisation in ttˉt\bar{t} events from pp collisions at s\sqrt{s} = 8 TeV in the lepton + jets channel with ATLAS

    Get PDF

    Measurement of the charge asymmetry in top-quark pair production in the lepton-plus-jets final state in pp collision data at s=8TeV\sqrt{s}=8\,\mathrm TeV{} with the ATLAS detector

    Get PDF

    Measurements of top-quark pair differential cross-sections in the eμe\mu channel in pppp collisions at s=13\sqrt{s} = 13 TeV using the ATLAS detector

    Get PDF
    corecore