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1
tesis de maestría
Publicado 2019
Enlace
Enlace
Descargue la tesis en el repositorio institucional de la Universidade Federal de São Carlos: https://doi.org/10.11606/D.104.2019.tde-08082019-103210
2
tesis de maestría
Publicado 2014
Enlace
Enlace
La metodología de superficie de respuesta juega un papel importante en el desarrollo, mejora y optimización de procesos y productos mediante la aplicación de un conjunto de técnicas estadísticas y matemáticas. Esta investigación se centra en la última etapa de esa metodología relacionada con el estudio de la superficie de respuesta en la región de interés. Por lo tanto, la presente disertación tiene como objetivo presentar de manera sintetizada un método para realizar el análisis de crestas de los modelos ajustados de superficies de respuesta de segundo orden que tienen como punto estacionario un punto de silla de montar o un punto fuera de la región experimental. En este análisis se buscan las condiciones óptimas de procesos y productos a través de experimentos planificados. El análisis de crestas es particularmente importante cuando es difícil visualizar la superfic...
3
tesis doctoral
El cambio climático representa una grave amenaza para la biodiversidad y la seguridad alimentaria. En este estudio se realizó una serie de experimentos y mediciones en campo para evaluar las respuestas de las plantas al cambio climático en los Andes de Perú. En el primer experimento, se cultivaron varias variedades de papa y maíz en diferentes elevaciones (y por tanto temperaturas) utilizando suelo del lugar o suelo trasladado desde elevaciones más altas. La idea fue simular un escenario de “migración“ (en el cual los agricultores tendrían que cambiar el lugar donde cultivan para mantener clima adecuado y similar al actual) y un escenario de “tolerancia“ (en el cual las plantas cultivadas tendrían que tolerar temperaturas más cálidas y, posiblemente, ataque de nuevos enemigos naturales). El segundo experimento tuvo similar diseño, excepto que se usó una especie de pl...
4
tesis doctoral
Publicado 2017
Enlace
Enlace
En este trabajo estudiamos las propiedades ópticas no lineales de origen puramente electrónico en muestras coloidales que contienen nanotubos de carbono semiconductores de pared simple (s-SWCNT) de diferentes quiralidades, elaboradas bajo dos métodos, síntesis por catálisis de cobalto y molibdeno (CoMoCAT) separadas usando cromatografía en columna y síntesis de monóxido de carbono a alta presión (HiPCO) con extracción acuosa de dos fases (ATPE). Para las mediciones no lineales, la técnica Z-scan (Z-scan) se montó con un láser de alta velocidad de repetición modulado por un chopper. Todas las muestras (SW01, SW02 y SW6,5) mostraron un comportamiento de índice de refracción no lineal negativo 2 (n <0), las curvas de dispersión | 2 | n generado debido a la exploración Z con longitudes de onda láser en resonancia con la banda de absorción de nanotubos muestran un comporta...
5
tesis de maestría
Publicado 2017
Enlace
Enlace
El virus Oropouche (OROV) es un arbovirus que se presenta en la región amazónica causando brotes de enfermedades febriles agudas y que puede ser asociado a meningoencefalitis. Aproximadamente 500.000 casos de Oropouche ocurrieron en Brasil. Sin embargo, no existe vacuna contra el OROV. El objetivo fue desarrollar un modelo animal de infección por OROV para estudiar la patogénesis de la enfermedad y para probar candidatos vacunales. Se utilizó como prototipo vacunal la proteína recombinante de la nucleocápside de OROV (NrOROV), que es el principal antígeno viral. En este estudio se utilizó ratones Balb/c de 12 semanas de edad, inoculados intracerebralmente con 8x10(elevado a 5) PFU de OROV, que indujo un 100% de letalidad después del tercer día de la infección. Altos títulos virales se encontraron en el cerebro y en la médula espinal de los animales. Sorprendentemente, 12 y ...
6
artículo
En el presente trabajo presentamos los resultados de una investigación realizada en la Facultad de Ciencias Matemáticas de la UNMSM, para investigar la proporción de personas que han consumido drogas, porcentaje de personas que consumen alcohol todos los fines de semana, y porcentaje de personas que copian en los exámenes, utilizando la teoría del modelo de respuesta no aleatorizada, el modelo paralelo (Tian, 2012;Tian & Liu 2014). En el diseño muestral, se utilizó el muestreo aleatorio estratificado con afijación proporcional al tamaño de cada estrato (Scheffer y Mendenhall, 2007) considerando como estratos a las Escuelas Académicas Profesionales (E.A.P.) de la FCM. Para el cálculo del tamaño de muestra se consideró un límite para el error de estimación de 3,03%, con un nivel de confianza del 95% y la información proporcionada por la Dirección Académica de la FCM, ...
7
artículo
En el presente trabajo presentamos los resultados de una investigación realizada en la Facultad de Ciencias Matemáticas de la UNMSM, para investigar la proporción de personas que han consumido drogas, porcentaje de personas que consumen alcohol todos los fines de semana, y porcentaje de personas que copian en los exámenes, utilizando la teoría del modelo de respuesta no aleatorizada, el modelo paralelo (Tian, 2012;Tian & Liu 2014). En el diseño muestral, se utilizó el muestreo aleatorio estratificado con afijación proporcional al tamaño de cada estrato (Scheffer y Mendenhall, 2007) considerando como estratos a las Escuelas Académicas Profesionales (E.A.P.) de la FCM. Para el cálculo del tamaño de muestra se consideró un límite para el error de estimación de 3,03%, con un nivel de confianza del 95% y la información proporcionada por la Dirección Académica de la FCM, ...
8
artículo
Publicado 2023
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Enlace
The author analyzes the problem of the application of life imprisonment in the crime of rape of minors, provided for in Article 173 of the Peruvian Criminal Code. He considers that although the Peruvian Supreme Court and Constitutional Court have reaffirmed its constitutionality, in the face of exceptional situations that arise in each particular case (grounds for reduction of punishability, procedural bonuses and personal circumstances of both the victim and the aggressor), the criminal law has not provided for the possibility of reducing the penalty to limits below the legal minimum, which in many cases has led to the legal operator of lower instances, despite such assumptions, to impose disproportionate penalties, far from the principle of guilt. This had to be corrected by the Supreme Court, and a context of legal insecurity was manifested that denaturalizes the purposes of criminal ...
9
tesis de grado
Publicado 2018
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Enlace
INTRODUÇÃO: O Fibroscan é um método não invasivo com alta reprodutibilidade e validado para avaliação da elasticidade pela elastografia hepática transitória (EHT) e da esteatose hepática através da medida do parâmetro de atenuação controlado (CAP). O surgimento dos antivirais de ação direta (DAAs) para o tratamento dos pacientes com hepatite viral C crônica (HCC) permitiu obter resposta virológica sustentada (RVS) em mais do 90% dos casos. Neste cenário, a elastografia por Fibroscan passou a ter papel de destaque, permitindo avaliação hepática não invasiva pré e pós-tratamento. OBJETIVOS: Avaliar os valores da EHT e do CAP (Fibroscan), no pré e pós-tratamento, dos pacientes tratados com DAAs para HCC e que obtiveram RVS, no ambulatório de hepatologia do Hospital Universitário Antônio Pedro. Descrever características gerais, perfil laboratorial e es...
10
artículo
Publicado 2025
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The complexity of the contemporary work environment has compelled organizations to adopt flexible work arrangements to enhance employee performance and satisfaction. Accordingly, this paper examines the implementation of employee flexibility and its effect on work quality. Specifically, it explores the impact of versatility, multitasking, and rapid response time on work quality. A survey research design was employed, targeting a population of 1,621 employees from selected manufacturing industries in Southwestern Nigeria. A scientifically determined sample size of 318 participants was selected, and a structured questionnaire was administered to them. The collected data were analyzed using partial least squares structural equation modeling (PLS-SEM). Findings reveal that multitasking exerts the strongest influence on work quality, followed by quick response time and versatility. The study ...
11
artículo
Publicado 2023
Enlace
Enlace
In 2020, the subject Science for Citizenship was included in the Chilean school curriculum in response to the global challenges to move towards scientific literacy to encourage citizens to participate in decision making for their personal lives or in their participation socially. The objective of the research was to understand the contributions of the subject Science for Citizenship to the Chilean school curriculum to advance toward scientific literacy.This article presents a descriptive analysis of the Chilean educational policy documents, based on the review of the purposes, approaches, modules, and learning objectives of the Science for Citizenship subject. The findings show that the curriculum promotes the acquisition, use, critical analysis, creation, and communication of information that addresses science and technology.
12
artículo
Publicado 2023
Enlace
Enlace
In 2020, the subject Science for Citizenship was included in the Chilean school curriculum in response to the global challenges to move towards scientific literacy to encourage citizens to participate in decision making for their personal lives or in their participation socially. The objective of the research was to understand the contributions of the subject Science for Citizenship to the Chilean school curriculum to advance toward scientific literacy.This article presents a descriptive analysis of the Chilean educational policy documents, based on the review of the purposes, approaches, modules, and learning objectives of the Science for Citizenship subject. The findings show that the curriculum promotes the acquisition, use, critical analysis, creation, and communication of information that addresses science and technology.
13
artículo
Publicado 2017
Enlace
Enlace
The aim of this study was to examine the preliminary evidence of validity of the Research Self-Efficacy Scale (RSE) through the analysis of item contents. A sample of ten research psychologists (70% male; Mage = 47.2 years old), and 34 Peruvian college students (> 70% female), both undergraduate (n = 19) and graduate (n = 15) was assessed. The researchers evaluated the relevance and clarity of the items, and the students, the clarity of the RSE statements. The answers given by the judges were systematized through Aiken’s V with confidence intervals, obtaining favorable results. In conclusion, the RSE exhibits favorable evidence regarding the representativity of the items. The practical implications of the findings are discussed here.
14
artículo
Publicado 2017
Enlace
Enlace
The aim of this study was to examine the preliminary evidence of validity of the Research Self-Efficacy Scale (RSE) through the analysis of item contents. A sample of ten research psychologists (70% male; Mage = 47.2 years old), and 34 Peruvian college students (> 70% female), both undergraduate (n = 19) and graduate (n = 15) was assessed. The researchers evaluated the relevance and clarity of the items, and the students, the clarity of the RSE statements. The answers given by the judges were systematized through Aiken’s V with confidence intervals, obtaining favorable results. In conclusion, the RSE exhibits favorable evidence regarding the representativity of the items. The practical implications of the findings are discussed here.
15
artículo
Publicado 2017
Enlace
Enlace
The aim of this study was to examine the preliminary evidence of validity of the Research Self-Efficacy Scale (RSE) through the analysis of item contents. A sample of ten research psychologists (70% male; Mage = 47.2 years old), and 34 Peruvian college students (> 70% female), both undergraduate (n = 19) and graduate (n = 15) was assessed. The researchers evaluated the relevance and clarity of the items, and the students, the clarity of the RSE statements. The answers given by the judges were systematized through Aiken’s V with confidence intervals, obtaining favorable results. In conclusion, the RSE exhibits favorable evidence regarding the representativity of the items. The practical implications of the findings are discussed here.
16
artículo
Publicado 2023
Enlace
Enlace
The UPPS-P scale is widely used to assess impulsivity. For this reason, the psychometric properties of the extensive version of UPPS-P were analyzed from the Rasch polytomous model. Eight hundred Argentine adolescents aged 12 to 18 years participated in the study. As a result, it was found that the dimensions of the UPPS-P presented an adequate fit to the Rasch model, adequate levels in the Person Separation Index (PSI), some items with local dependence and an adequate level of unidimensionality. It is concluded that the scale is a valid instrument to assess impulsivity in adolescents; therefore, a conversion table with interval scores is presented to increase the measurement precision of the instrument.
17
artículo
Publicado 2023
Enlace
Enlace
In 2020, the subject Science for Citizenship was included in the Chilean school curriculum in response to the global challenges to move towards scientific literacy to encourage citizens to participate in decision making for their personal lives or in their participation socially. The objective of the research was to understand the contributions of the subject Science for Citizenship to the Chilean school curriculum to advance toward scientific literacy.This article presents a descriptive analysis of the Chilean educational policy documents, based on the review of the purposes, approaches, modules, and learning objectives of the Science for Citizenship subject. The findings show that the curriculum promotes the acquisition, use, critical analysis, creation, and communication of information that addresses science and technology.
18
artículo
Publicado 2022
Enlace
Enlace
This study aimed to identify the capacity of the dark personality to explain the emotional intelligence trait. The sample comprised 395 subjects, aged 18 to 30 years (M = 21.19; SD = 1.75), who responded to the Short Dark Triad, Short Sadistic Impulse Scale, Spitefulness Scale and Emotional Skills Inventory. To achieve the proposed objective, a path analysis model was performed. The results indicated that sadism, achiavellianism and narcissism positively explain the dimensions of emotional intelligence, while psychopathy and pitefulness explain it negatively. The findings of this study highlight caution when interventions are carried out to increase emotional intelligence in individuals with dark traits, since they can use it for emotional manipulation.
19
artículo
Publicado 2023
Enlace
Enlace
This study aimed to identify the capacity of the dark personality to explain the emotional intelligence trait. The sample comprised 395 subjects, aged 18 to 30 years (M = 21.19; SD = 1.75), who responded to the Short Dark Triad, Short Sadistic Impulse Scale, Spitefulness Scale and Emotional Skills Inventory. To achieve the proposed objective, a path analysis model was performed. The results indicated that sadism, achiavellianism and narcissism positively explain the dimensions of emotional intelligence, while psychopathy and pitefulness explain it negatively. The findings of this study highlight caution when interventions are carried out to increase emotional intelligence in individuals with dark traits, since they can use it for emotional manipulation.
20
artículo
Publicado 2023
Enlace
Enlace
The UPPS-P scale is widely used to assess impulsivity. For this reason, the psychometric properties of the extensive version of UPPS-P were analyzed from the Rasch polytomous model. Eight hundred Argentine adolescents aged 12 to 18 years participated in the study. As a result, it was found that the dimensions of the UPPS-P presented an adequate fit to the Rasch model, adequate levels in the Person Separation Index (PSI), some items with local dependence and an adequate level of unidimensionality. It is concluded that the scale is a valid instrument to assess impulsivity in adolescents; therefore, a conversion table with interval scores is presented to increase the measurement precision of the instrument.
