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1
artículo
Publicado 2025
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This paper is concerned with traveling wave solutions for a delayed reaction-diffusion SVIR epidemic model that includes both general incidence function and imperfect vaccination. In the model, the spread of infection in space is explicitly taken into account by using a heterogeneous environment; it takes into consideration the delay in immune response and inefficiency in vaccinations. The analysis carried out below shows that the basic reproduction number Ro will be a critical value for determining the existence of traveling waves. More precisely, when Ro > 1 there exists a minimal wave speed ρ* > 0 such that the system admits nontrivial traveling wave solutions for ρ ≥ ρ* whereas no such solutions exist for ρ < ρ*. On the other hand, if Ro ≤ 1, there are no traveling wave solutions. The introduction of delays and imperfect vaccination adds richness and complexity to t...
2
tesis de grado
Publicado 2022
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Universidad Nacional Agraria La Molina. Facultad de Ingeniería Agrícola. Departamento Académico de Recursos Hídricos
3
artículo
An infant stimulation in mother-child relationship assessment scale (ISA Scale) was developed, based on a classification of probable effects on child's behavior, such as behavioral promotion stimulation (BPS) and behavioral control stimulation (BCS), refering to mother action level to promote desirable behaviors and to control socially non desirable behaviors in child's behavior repertory. 540 mother-child dyads were evaluated. The construct validity tests showed significant correlations in item analysis, between subescales along with child development measures (social maturity and aggressiveness). In addition significant correlations (p<.05) were identified in validity tests showing criteria. On the other hand, the reliability tests indicated high stability and internal consistency. During this work we verified the important influence this stimulation had on the psychological develop...
4
artículo
The purpose of this study is to determine the correlation between executive functions and mathematical notions in five-year-old children. In order to carry out the investigation, 80 infants of a public institution were taken as a sample, who were evaluated the different notions such as object, space, time and order; in conjunction with executive functions working memory, inhibitory control and cognitive flexibility. For which two observation sheets were used. The methodology used corresponds to a quantitative approach of basic type, basic type, correlational level, non-experimental design, cross-section. As a result, Rho = 0.638, were obtained, which indicates that the correlation is positive moderate according to Spearman with an equivalent degree of bilateral significance ap = 0.00 (p <.005), so a significant relationship between the two is affirmed. themes. It was concluded that th...
5
artículo
Publicado 2024
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This study aims to design a virtual learning platform for the Francisco Pizarro Educational Unit, based on a Moodle pedagogical model that offers a variety of flexible tools and functions that make it easier for students to build their own knowledge, the methodology is a research with a focus quantitative based on empiricism, experience, observation and analysis of facts, the research design is quasi-experimental, the survey and questions were used for the pair of variables, 74 students participated. It is concluded that the Shapiro-Wilk test (n < 50); points out that in the pretest, both the control group and the experimental group obtain a sig. = 0.000. Consequently, in all cases, the groups obtained a sig. < 0.05, in this way the H0 is rejected and the HI is accepted: which means that the data analyzed does not follow a normal distribution. Therefore, the Mann Whitney U statistic was ...
6
tesis de maestría
Publicado 2012
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El presente trabajo de investigación tiene como propósito la formulación de una metodología de Auditoria basada en Procesos y Riesgos a fin de que sea modelo de aplicación practica en las Auditorias que se realicen en el Banco de la Nación y en entidades financieras del sector público. Asimismo este modelo puede ser adecuado y replicado en las auditorias que los Órganos de Control Interno de otras entidades y empresas del estado ejecuten en cumplimiento de su Plan Anual de Control, tanto en las acciones y actividades de control. El enfoque de la investigación utilizada es mixto (combinación cualitativa y cuantitativo). Las técnicas para la recolección de datos fueron mediante entrevistas con la aplicación de un cuestionario tomando como base los procesos que se auditaran. Con respecto al alcance de la investigación cuantitativa los cuestionarios aplicados serán calificados...
7
artículo
Publicado 2025
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In Mexico, a high percentage of young people experience symptoms of generalized anxiety, which are associated with difficulties in executive functions (EF). However, previous studies have shown inconsistent results, as they often rely solely on either objective or subjective measures. Therefore, this study focused on analyzing the relationship between generalized anxiety and EF using both a neuropsychological battery and a self-report questionnaire, in order to provide a more comprehensive understanding of cognitive functioning in adolescents. A quantitative, non-experimental, cross-sectional, correlational, and explanatory design was employed. The sample consisted of 96 adolescents between 12 and 15 years old from the state of Puebla, Mexico. A total of 10.41% of participants presented severe symptoms of generalized anxiety. A significant relationship was found between anxiety and one o...
8
artículo
Publicado 2022
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Autism Spectrum Disorder (ASD) is considered a neurodevelopmental disorder, whose prevalence has increased in recent years, showing in some cases deficits in the cognitive area, with processing speed (PS) being one of the affected variables. Therefore, the present study aims to: 1) compare the scores obtained in relation to the PS variable between students aged 6 to 11 with ASD and their peers with neurotypical development in Metropolitan Lima; and 2) establish the PS profile of the included students with ASD. For this, 30 children aged 6 to 11 attending to regular basic education institutions (RBE) in Metropolitan Lima were sampled, 15 with neurotypical development and 15 included with ASD. For the first objective, a case-control design (CCD) was used, while the second objective was a selective non-probabilistic cross-sectional design. Results showed a lower performance by the group wit...
9
tesis de grado
Publicado 2017
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Universidad Nacional Agraria La Molina. Facultad de Economía y Planificación. Departamento Académico de Gestión Empresarial
10
tesis de grado
Publicado 2017
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El presente trabajo de investigación titulado “APLICACIÓN DE UN CONTROL DE INVENTARIOS BASADA EN LA DETERMINACIÓN DE MERMAS Y DESMEDROS Y SU INFLUENCIA EN EL COSTO DE VENTAS DE LA EMPRESA AVÍCOLA MABEL SAC TRUJILLO - 2017”, cuyo objetivo general fue demostrar que la aplicación de un control de inventarios basada en la determinación de mermas y desmedros influye en el costo de ventas de la empresa afectando los resultados financieros; se inició con la recopilación de información, utilizando el diseño de contrastación cuasi-experimental. Como primer punto se diagnosticó las actividades de control durante los procesos de adquisición y venta de mercaderías (pollo vivo); por consiguiente, se analizó el control de inventarios; permitiendo el hallazgo de una serie de deficiencias en cuanto al manejo de inventarios. Como resultado se determinó que la empresa desempeña sus fu...
11
tesis de grado
Publicado 2012
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In this research work has been synthesized and characterized by chemical route monometallic and bimetallic nanoparticles Core / Shell (Au / Ag), using two-step method involving the preparation of a solution of nuclei formed by gold nanospheres and its union with the armor formed by silver nanospheres; to this, the final size of the nanostructure, intimately dependent kernel size for that matter studied and experimentally examined the influence of parameter variation in the synthesis process._x000D_ It basically studied the influence of synthesis parameters on the gold nucleus, then it choose the best conditions and make the coating and produce silver bimetallic nanostructures. Variations were such as: Method of synthesis of the nanosphere, temperature stabilizing cetyltrimethylammonium bromide (CTAB) 65, 75, 85 and 95 °C, precursor Origin of chloroauric acid (HAuCl4) Stabilizer Type hom...
12
tesis de grado
Publicado 2025
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El presente proyecto, titulado “Solución tecnológica basada en Intune de Azure y Samsung Knox para la gestión administrativa de equipos móviles en una empresa productora de tuberías en el Perú”, aborda la necesidad de optimizar el control, la seguridad y la gestión administrativa de los dispositivos móviles corporativos. Durante el análisis inicial se identificaron diversas limitaciones en la gestión existente, tales como la falta de centralización, dificultades de acceso, bloqueos ocasionados por el uso de cuentas personales y la ausencia de mecanismos de restablecimiento remoto. Para resolver estas deficiencias, se diseñó una solución integrada basada en Microsoft Intune y Samsung Knox. El desarrollo del proyecto incluyó la configuración de un entorno centralizado de administración, el enrolamiento automático de dispositivos mediante Knox Mobile Enrollment y la ap...
13
tesis de grado
Publicado 2017
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RESUMEN La tesis “Mejora del proceso de atención de garantías en el área de servicios para Válvulas de Control en SAMSON CONTROLS S.A.”. Se aplicará en la empresa SAMSON CONTROLS S.A. – Filial Perú, con la finalidad de tener un mejor servicio de atención de garantías por parte de nuestros personal, así garantizando una acertada evaluación del estado de las válvulas de control, reduciendo tiempos de visita técnica innecesarias, tiempos muertos de atención, crear un estándar de procesos de atención de reclamos. La presente tesis, se debe a los resultados obtenidos por el crecimiento de la base instalada en la industria peruana desde el año 2010, aumentando la demanda de atención de garantías. Desde el 2011 al 2016 se ha cuadruplicado las ventas, y se ha duplicado la base instalada con respecto a los inicios de operación. El objetivo planteado es reducir el tiempo d...
14
tesis de grado
Publicado 2018
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La investigación tiene por objetivo, determinar el proceso del ambiente de control en el control interno, en una MYPE de turismo de Lima Metropolitana, debido a que por mucho tiempo el alcance del Control Interno estuvo limitado a las áreas económicas, y cuando se hablaba de Control Interno se entendía que era inherente a las actividades de Contabilidad y Finanzas; el resto de las áreas operacionales y de hecho sus colaboradores no se sentían involucrados. Esto hizo que en la investigación se maneje una metodología que “por su finalidad es pura o básica porque es rigurosa, organizada y se lleva a cabo cuidadosamente, aportando conocimiento, nuevas teorías y principios básicos” Hernández, Fernández & Baptista (2016). Por otro lado, “Por su nivel de investigación es descriptiva, porque señala cómo es y cómo se manifiesta un fenómeno o evento, cuando se busca especif...
15
artículo
Blockchain technology is expected to change the way in which the exchange of goods and services is developed, the management of conflicts, and will substantially influence the process of state modernisation. The current research aims to be a simple organisational and theoretical guide that provides a strategy for the process of conflict management in the state sphere. This is based on the imperative need to modernise the current public system, based on the division of powers. This article fundamentally emphasises three concordant ideas: first, that blockchain technology helps to automate certain tasks, thus facilitating access to a decentralised space independent of a central control authority. It democratises and makes management and decision-making processes transparent, allowing all those involved to be examined on an equal footing, and third, it aims to maintain the necessary manual ...
16
artículo
Publicado 2023
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The objective of the study was to evaluate the incidence of the application of trigonometric functions in a heuristic mode, on the cognitive development of adolescents from Cauri. In this sense, the autonomous variable was applied to the dependent variable to generate an effect of improvement in cognitive development. The study had an explanatory level, basic type and quasi-experimental design. The population was made up of 335 young people from Cauri, from which a non-random sample of 46 was selected, who were grouped as follows: 20 in the experimental group and 26 in the control group. The data were collected through three evaluative written tests, each with 10 propositions to develop. The data obtained were processed in Microsoft Excel, which allowed the calculation of the statistics corresponding to the descriptive and inferential analysis. The results showed that the test T value is...
17
artículo
Publicado 2019
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The purpose of this research is to present a summary of the functional characteristics of the worker of public administration through a tab with 20 items on Likert scale to evaluate trends positive and negative of committing some kind of administrative dysfunction as well as a summary of the Peruvian legal framework, sustaining new ethical guidelines that will promote the transformation of governancein which the Constitution of the Peru of 1993 and law No. 27815 among others were taken as references. The basic objective of the research was to identify, describe and analyze the values and principles that govern the behavior of the public official, and contribute to greater efficiency in the public service in the Nauta-Iquitos-Peru Local Government. Within the framework of the study considered a premise concerning the formation or transformation of the management towards a new institutiona...
18
artículo
Publicado 2023
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Early mathematical competencies have a great impact on academic performance and on the development of more complex mathematical skills, especially in early education. Several authors have highlighted the importance of working memory and inhibition in the development of these mathematical skills; however, there is no agreement regarding the explanatory capacity of these executive domains with respect to differentiated performance in mathematics. The aim of this research was to evaluate the predictive capacity of verbal and visuospatial working memory and of behavioral and cognitive inhibition in mathematical competencies of relational logic and numerical type in 106 Chilean children of early education between 4 and 6 years old, who were evaluated with four executive tasks and an early mathematical assessment test. For data analysis, correlations and multiple linear regressions were perfor...
19
artículo
Neural networks and muscle bio-potentials: towards a more natural control of myoelectric prosthetics
Publicado 2024
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Technological innovation in the control of myoelectric prostheses is essential for improving the functionality of people with motor disabilities. This study aimed to design and implement a non-invasive system for acquiring electromyographic (EMG) signals to classify basic upper limb movements using neural networks. The experimental methodology included hardware design, subject preparation, and EMG signal capture in three hand states (extended, relaxed, and closed). Disposable electrodes with conductive gel were placed on the forearm muscles, and a SichyRay board was used to amplify and digitize signals at 1 kHz and 10 bits. Signal processing included high-pass filters (5 Hz), low-pass filters (450 Hz), and segmentation into 200 ms windows. Google Colab, TensorFlow, and Scikit-learn were used for data analysis and classification. Three neural network models were evaluated: a feedforward n...
20
tesis de grado
Publicado 2024
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Actualmente en el Perú se tienen varios proyectos mineros, los cuales priorizan la construcción de campamentos mineros modulares, para el adecuado descanso se sus colaboradores; los cuales tengan los servicios básicos y brinden las comodidades que pudieran encontrar en sus respectivos hogares. Para que se puedan ejecutar los campamentos mineros se requiere de una serie de procesos propios de la construcción, pero a la par se requiere asegurar y controlar que la construcción de los campamentos mineros se realice de acuerdo a lo requerido por el cliente, lo cual esta previamente establecido en las especificaciones del proyecto. Para el aseguramiento y control de la calidad de la construcción de los campamentos mineros modulares se requiere una serie de formatos y registros como son los planes de calidad, planes de inspección y ensayo (PIE), registros de control de obra; estos planes...
