134 research outputs found

    La gestión de los recursos públicos y la administración de la cadena de suministros en el Gobierno Regional de Junín

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    La investigación tuvo como objetivo determinar la relación de la gestión de los recursos públicos con la administración de la cadena de suministros en el Gobierno Regional de Junín. Se utilizó para alcanzar dicho objetivo el método descriptivo que corresponde a la investigación de tipo descriptivo; asimismo la población objeto estuvo constituida por 260 funcionarios administrativos, relacionados directamente con el manejo de recursos económicos y logísticos de la Región Junín. Al calcular el tamaño de la muestra se trabajó finalmente con 156 personas. En cuanto a la técnica de recolección de datos tenemos a la encuesta que constó de 15 ítems de tipo cerrado. La prueba estadística utilizada fue la prueba chi cuadrado el margen de error utilizado fue 0.05. Finalmente se concluyó que la Gestión de los Recursos Públicos se relaciona positivamente con la Administración de la Cadena de Suministros en el Gobierno Regional de Junín; los resultados de los estadísticos de las hipótesis siempre son mayores al valor referencial del criterio de distribución de chi cuadrado que es 21.02; en ese sentido la hipótesis general nula es rechazadoThe research entitled aimed to determine the relationship of the management of public resources with the administration of the supply chain in the Regional Government of Junín. The descriptive method that corresponds to the descriptive research was used to reach this objective; Likewise, the target population was constituted by 260 administrative officials, directly related to the management of economic and logistic resources of the Junín Region. When calculating the sample size, we finally worked with 156 people. Regarding the technique of data collection we have the survey that consisted of 15 items of closed type, The statistical test used was the chi square test, the margin of error used was 0.05. Finally, it was concluded that the Public Resources Management is positively related to the Supply Chain Administration in the Regional Government of Junín; the results of the statistics of the hypotheses are always greater than the reference value of the chi square distribution criterion, which is 21.02; in that sense the null general hypothesis is rejecte

    Ethanol gas sensing mechanisms of p-type NiO at room temperature

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    Conductometric gas sensors based on metal oxide semiconductors (MOS) usually require high temperature operation, increasing their energy consumption and limiting their applicability. However, room temperature operation with these devices still remains a challenge in many sensor-analyte systems due in part to the low or null response and recovery speeds obtained at this temperature. In this work, the conductometric response of p-type NiO ceramic samples to ethanol is studied under room temperature operation. An anomalous response consisting in an unexpected resistance decrease upon ethanol exposure is observed depending on sample texturing, which is tuned by changing the temperature at which the samples are synthesized. This anomalous response is characterized by fast response and recovery times. A model based on two competing mechanisms, consisting in either an electron transfer from NiO to the ethanol molecule or the catalytic decomposition of adsorbed ethanol, is proposed to explain the observed anomalous response. Extending this model to other MOS could pave the way for fast sensors operating at room temperatur

    Effect of pH Change on the Microalgae-Based Biogas Upgrading Process

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    An alternative way to remove CO2 from biogas is the use of photosynthetic microorganisms, such as microalgae. This can be achieved by the operation of an open photobioreactor, connected with a mass transfer column, such as a counterflow column. This technology provides up-graded biogas with high quality. The microalgal uptake of CO2 from the biogas in counterflow columns generates pH changes in microalgae culture. To clarify the potential effect of these dynamic pH conditions in the culture, the effect of pH change on the photosynthetic activity and PSII quantum yield was studied for microalgae Chlorella sorokiniana. Thus, assays were carried out, where the pH drop reported in the counterflow columns was replicated in batch microalgae culture through HCl addition and CO2 injection, moving the culture pH from 7.0 to 5.0 and from 7.0 to 5.8, respectively. Moreover, the effect of light/darkness on photosynthetic activity was tested when the pH decreased. The results obtained in this research showed that the photosynthetic activity decreased for the light conditions when the pH was shifted by HCl addition and CO2 injection. Despite this, the value of the PSII quantum yield remained at 0.6–0.7, which means that the microalgae culture did not suffer a negative effect on the photosynthetic system of cells because a high value of PSII efficiency remained. In the same way, the results indicated that when the pH change was corrected, the photosynthetic activity recovered. Moreover, the apparent affinity constant for dissolved inorganic carbon (KDIC) was 0.9 µM at pH 5 and 112.0 µM at pH 7, which suggests that the preferred carbon source for C.sorokniana is CO2. Finally, all the results obtained indicated that the pH drop in the counter-flow column for biogas upgrading did not cause permanent damage to the photosynthetic system, and the decrease in the photosynthetic activity as a result of the pH drop can be recovered when the pH is corrected.This research was funded by FONDECYT-ANID CHILE, grant number 1120488, CRHIAM Centre (CONICYT/FONDAP) grant number 15130015, and VRIEA-PUCV grant number 039.315/2022

    Dictionary Royale

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    Treball de l'alumnat del Grau d'Educació Primària de la Facultat d'Educació de la UB. Proposta d'activitat emmarcada al projecte de recerca EDU201S-69332-R "Desarrollo de las competencias para la educación multilingüe". Any: 2017. Tutors: Juli Palou i Margarida CambraDictionary Royale és una proposta didàctica que fomenta l’aprenentatge de les llengües de manera interactiva i cooperativa a través d’una plataforma virtual. Alhora, també potencia l’aprenentatge de forma autodidàctica per part dels alumnes per tal que busquin i creïn les seves pròpies estratègies i siguin capaços d’expressar les seves descobertes

    Análisis del contenido multimedia empleado por la Policía Nacional en facebook sobre la pandemia, Lima 2021

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    La presente investigación buscará profundizar en el contenido multimedia empleado por la Policía Nacional en Facebook sobre la pandemia. Se utilizó un enfoque cualitativo de corte fenomenológico. Los resultados arrojan que su multimedia cuenta con una composición simple y creativa con un mensaje claro además de preciso que se apoya en el humor para informar y persuadir a las personas a identificarse con el contexto para así sumarse a la lucha contra esta pandemia. Se concluyó que el contenido multimedia sobre la pandemia empleado por la P.N.P en Facebook es innovador en la composición de mensajes para informar y sensibilizar sobre el COVID-19, usando correctamente formatos digitales en sus piezas, logrando un papel importante a la hora de comunicar al ser atractivo desde lo visual

    El impacto de la migración extranjera y la criminalización en el Distrito del Cercado de Lima, 2021

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    La presente investigación tiene como objetivo principal determinar el impacto de la migración extranjera y su relación con la criminalización, para llegar a ello se analizó el incremento de la delincuencia relacionada con la comunidad inmigrante, los efectos en la ciudadanía quienes formaron un juicio asociando la inmigración y criminalidad; se identificaron relaciones entre delitos ocurridos en el distrito del Cercado de Lima con determinados grupos de migrantes, mencionando consecuencias y factores de esta incidencia criminal. Esta investigación se desarrolla bajo un enfoque cuantitativo de tipo básico, transversal de investigación correlacional-descriptiva. Como técnica de recolección de datos se utilizó la encuesta, analizados en la discusión de resultados recogidas de la comunidad jurídica (Abogados, jueces, fiscales y personal policial) analizando estos resultados en encuestas realizadas según indicadores de criminalización y victimización del último año (2021) en ciudadanos extranjeros en el Perú. Del estudio se concluye que existe una relación directa entre el aumento del número de inmigrantes y número de delitos violentos, resultando situaciones complejas en la resolución por parte de las autoridades nacionales. Existe tolerancia en la normativa nacional especialmente en aquellos migrantes con identificación irregular, teniendo como consecuencia el aumento de sensación de miedo en la ciudadanía de Lima Cercado.The main objective of this research is to determine the impact of foreign migration and its relationship with criminalization, the increase in crime related to the immigrant community was analyzed, causing citizens to form judgment associating immigration and criminality; The relationships between crimes that occurred in the Cercado de Lima district and certain groups of migrants will be identified, mentioning consequences and factors of this criminal incidence. This research is developed under a qualitative approach of a basic, cross-sectional, correlational-descriptive research. As a data collection technique, the survey was used, analyzed in the discussion of results collected from the legal community (Lawyers, judges, prosecutors and police personnel) analyzing the results of surveys carried out on the criminalization and victimization indicators of the last year (2021 ) of which foreign citizens are in Peru. The study concludes that there is a direct relationship between the increase in the number of immigrants and the number for violent crimes exposing complex situations to national authorities in the already growing criminal repression originated by our compatriots from years prior to the migratory wave. There is tolerance in the national regulations, especially in those migrants with irregular identification, having as a consequence an increase in the feeling of fear in the citizens of Lima Cercado

    Searching for selective scaffolds against Plasmodium falciparum glucose-6-phosphate dehydrogenase 6-phosphogluconolactonase

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    Malaria is a parasitic disease caused by Plasmodium spp., being one of the major causes of death worldwide with two-hundred million new infections and hundreds of thousands of deaths in 2015. Despite the important advances in its prevention and treatment, its resistance to current drug therapies is still a serious risk in its eradication. There is urgency in finding novel targets and drugs operating by novel mechanisms, avoiding cross-resistance to classical antimalarials. In this context, the bifunctional enzyme Glucose-6- phosphate dehydrogenase 6-phosphogluconolactonase appears to be a promising therapeutic target due to its crucial role in regulating the PPP pathway (pentose phosphate pathway), which is the major source of redox potential in Plasmodium falciparum. In the last few years, our group detected a specific mutation between the human and the Plasmodium falciparum form in the binding site of Glucose-6-phosphate (G6P), the endogenous ligand of Glucose-6-phosphate dehydrogenase (G6PD). This mutation involves the substitution of an Arginine (human) by an Aspartate (parasite), which allowed us to create a validated in-house homology model of PfG6PD. Based on this result, the group has focused their efforts, through different molecular modelling techniques, in the discovery of selective scaffolds against PfG6PD. Current efforts address the development of a complete structural model of the bifunctional enzyme, which may offer novel opportunities to develop molecules capable of inhibiting this relevant enzyme

    Programming Languages and Development of Key Competences. Systematic Review

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    El presente estudio trata de dar respuesta a una serie de interrogantes relacionados con los lenguajes de programación en el marco de la educación formal; en particular, en qué etapas educativas se usan los lenguajes de programación y cuáles son los más utilizados. A su vez, se pretende conocer la repercusión de estos lenguajes en el aprendizaje del alumnado, para lo cual se ha estudiado su influencia en el desarrollo de las competencias clave. Se llevó a cabo una revisión sistemática, según los fundamentos de la declaración PRISMA, de los trabajos indexados en las bases de datos Web of Science y Scopus entre 2007 y 2018. Los resultados muestran un incipiente interés de la comunidad científica por los lenguajes de programación en entornos educativos formales. Asimismo, se ha constatado la eficacia del uso de los lenguajes de programación en el desarrollo competencial del alumnado.This study endeavors to answer a number of questions regarding programming languages in formal education – in particular, in which educational stages programming languages are used and which programming languages are most widely used. Similarly, the study also seeks to explore the impact of these languages on student learning, and to that end, examines how they influence the development of key competences. A systematic review was conducted of studies indexed in the Web of Science and Scopus databases from 2007 to 2018, in accordance with the PRISMA statement. The results show an emerging interest among the scientific community in programming languages in formal learning environments, while confirming the effectiveness of using programming languages for student competence development
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