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1
artículo
Publicado 2004
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OBJECTIVE: To relate the perceived index of the environmental quality to environmental stress in students of the UNMSM - Peru. DESIGN: Descriptive corelational with an intentional sample of 200 subjects. MATERIAL And METHODS: The semantic differential was used to measure both variables. 5 aspects of the atmosphere were moderate selected by the sample: the green sweepings, areas, the smog, the transit, the security, being the considered SMOG most serious. RESULTS: Was an equal index PEQI to 3.82, slightly satisfactory. The level of measured environmental stress was of an average of 3.45, little satisfactory. CONCLUSIONS: Both results little indicate a good relation with the surroundings. The relation between both variables has an equal r to 0.62, is to say that it is significant.
2
artículo
Publicado 2004
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OBJETIVO: Relacionar el índice percibido de la calidad ambiental con el estrés ambiental en estudiantes de la UNMSM - Perú. DISEÑO: Descriptivo correlacional con una muestra intencional de 200 sujetos. MATERIAL Y MÉTODOS: Se usó el diferencial semántico para medir ambas variables. Se midieron 5 aspectos del ambiente seleccionados por la muestra: la basura, áreas verdes, el smog, el tránsito, la seguridad, siendo el SMOG considerado el más grave. RESULTADOS: Se encontró un índice PEQI igual a 3,82, ligeramente satisfactorio. El nivel de estrés ambiental medido fue de una media de 3,45, poco satisfactorio. CONCLUSIONES: Ambos resultados indican una relación poco buena con el entorno. La relación entre ambas variables tiene una r igual a 0,62, es decir que es significativa.
3
tesis de maestría
Publicado 2025
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La presente tesis detalla el desarrollo e implementación de un robot diferencial equipado con una Unidad de Medición Inercial Inertial Measurement Unit (IMU), encoders y Lidar. Estos sensores proporcionan datos para la navegación del robot dentro de un entorno controlado. El objetivo principal de esta investigación es mejorar la precisión en la estimación de la posición del robot mediante el uso de funciones modulantes, incrementando así la exactitud en la estimación de sus coordenadas. La IMU, un sensor fundamental para medir aceleraciones y velocidades angulares, es particularmente susceptible al ruido y la deriva, lo que puede comprometer la exactitud de las estimaciones de posición y orientación. Al integrar funciones modulantes, estos problemas se mitigan, resultando en una mejora en la calidad de los datos sensoriales. Este enfoque compensa eficazmente la deriva, lo que ...
4
artículo
Publicado 2018
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Nucleic acid detection with high sensitivity and selectivity capabilities could aid in the diagnosis of varies diseases such as: infections, cancer, among others. Discrimination of a mismatch or single nucleotide substitution (SNS) is challenge due to a minimum pair to pair formation double strand needed to stabilize the structure. Here we present a new approach to atinge the needed stability by using additional segments strains to favored stabilization. The use of additional complementary strains facilitates the discrimination of a SNS in a cooperative way.
5
artículo
Publicado 2017
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El objetivo del trabajo fue realizar la estandarización de los protocolos moleculares, diferenciar los linajes de la tilapia roja y gris mediante microsatélites de ADN y evaluar los marcadores SCAR-5F-X/5R y SCAR-5F/5R-Y como indicadores del sexo genético de O. niloticus. El microsatélite UNH106 permitió diferenciar genéticamente los linajes de la tilapia roja de la gris. Los microsatélites UNH136, UNH115 y UNH995 presentaron loci monomórficos tanto en la tilapia roja como en la gris en el lote poblacional del Centro Experimental de Genética de la Universidad Nacional de Trujillo. Se describen los tamaños de fragmentos para los microsatélites y del gen de referencia β actin. También se confirmó la efectividad de los marcadores SCAR como informativos en la determinación del sexo genético evaluados en hembras XX y YY y machos XY y YY de O. niloticus roja y hembras XX y mach...
6
tesis doctoral
Publicado 2024
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Los sistemas inteligentes son un área de las ciencias de la computación que busca resolver problemas complejos y multidisciplinares mediante el uso de un enfoque automático mediante la captura de información a partir de la cual puede realizar acciones y evaluar su resultado con el fin de aprender de su experiencia y mejorar su desempeño y eficiencia. Estos sistemas pueden ser aplicados en robótica con fines de navegación autónoma, donde el uso de técnicas convencionales de control automático es muy complejo. Los temas con mayor potencial son el Aprendizaje por Refuerzo y el Aprendizaje Profundo, que a través de su combinación es posible resolver problemas de alta complejidad a partir del entrenamiento de marcos computacionales basados en recompensas por realizar una acción correcta o penalizaciones por acciones incorrectas. El proyecto de tesis está enfocado en dotar de la ...
7
objeto de conferencia
Publicado 2017
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Aunque las señales electromiográficas superficiales son la señal de entrada más común para los algoritmos de aprendizaje automático en aplicaciones de reconocimiento de gestos de la mano y estimación de la fuerza del dedo, sólo hay unos pocos sistemas disponibles comercialmente para la adquisición de EMG superficial. Este trabajo propone una matriz de electrodos superficiales seca, barata y fácil de fabricar. Este sistema utiliza múltiples sensores diferenciales activos integrados en una pequeña placa de circuito impreso de doble capa, cada uno de los cuales utiliza dos pequeñas áreas rectangulares de la capa inferior como capa conductora para la adquisición de la señal. Con una ganancia diferencial de 60dB entre 23 y 3000Hz y una relación de rechazo de modo común de -60dB a 60Hz. Se presentan los criterios de diseño y las simulaciones.
8
artículo
Publicado 2023
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This paper is a descriptive-explanatory investigation of Peruvian seafood lexicons. This article has two objectives: the first is to select and record the semantic features that make up the immanent and manifested meaning of Peruvian seafood lexicons; the second is to rank the lexicons according to semantic inclusion relations based on lexical fields. To do this, we use a descriptive structuralist methodology where we select and register a corpus of 30 names of Peruvian seafood extracted from Peruvian recipe books and gastronomic dictionaries and then group and describe them in minimal pairs that allow us to select the similar and differentiating semantic features; we also hierarchise the lexical fields found to account for the semantic relations of inclusion. In this way, we are able to determine the semantic features that allow us to transfer lexemes from a common language to a special...
9
artículo
Publicado 2024
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Mathematical models are widely used to study the spreading dynamics of infectious diseases. In particular, the “Susceptibles-Infecteds-Recovereds-Deceases”(SIRD) model provides a framework that can be adapted to describe the core spreading dynamics of several human and wildlife infectious diseases. The present work uses a SIRD model using Caputo fractional derivative. In this investigation, the existence and uniqueness of solutions for the model were established. Numerical solutions were obtained using the Adams-Bashforth method. To illustrate the model’s utility, we made forecasts for the spread of the virus SARS-Cov-2 in the region of Tacna in Perú. It is well known that these models can help to forecast the number of infected people, understand the disease dynamics and evaluate potential control strategies.
10
artículo
Publicado 2013
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We show the implementation of an instrument to measure the sky quality for astronomical purposes (seeing) using the Differential Image Motion Monitor technique. This instrument let us an acute and systematic measurement of seeing along with its temporal evolution. We monitored seeing at Huancayo Observatory during seven consecutive nights in 2012 August. Mean seeing was 1.34” ± 0.33”. In 14% of the observed time, seeing was below than 1”, and in 71% below than 1.5”. The successful implementation of this technique and its applicability let us using this instrument in several places where a program of site testing will be scheduled in Peru. The selection of a professional astronomical facility (as an astronomical observatory) will be benefited with DIMM measurements.
11
artículo
Publicado 2020
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The purpose of this study is to design a reliable methodology that facilitates the learning and calculation of the derivative used in graph construction, in the determination of the tangent and normal lines to a curve and its slopes, in the calculation of velocity and acceleration. snapshots, and problems of optimization in the various fields of science, with which, it is expected, the perception and learning of the engineering student will be increased and, consequently, his academic performance will rise. All this, in view of the fact that the general intelligence factor, on which this performance depends largely, is innate and usually does not increase substantially with the development of the individual. For the current progress of this research, two algebraic assistants extracted from the internet and a program created in Excel have been used, through algorithms previously designed ...
12
artículo
Publicado 2020
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The purpose of this study is to design a reliable methodology that facilitates the learning and calculation of the derivative used in graph construction, in the determination of the tangent and normal lines to a curve and its slopes, in the calculation of velocity and acceleration. snapshots, and problems of optimization in the various fields of science, with which, it is expected, the perception and learning of the engineering student will be increased and, consequently, his academic performance will rise. All this, in view of the fact that the general intelligence factor, on which this performance depends largely, is innate and usually does not increase substantially with the development of the individual. For the current progress of this research, two algebraic assistants extracted from the internet and a program created in Excel have been used, through algorithms previously designed ...
13
artículo
Publicado 2017
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Charged-current νμ interactions on carbon, iron, and lead with a final state hadronic system of one or more protons with zero mesons are used to investigate the influence of the nuclear environment on quasielasticlike interactions. The transferred four-momentum squared to the target nucleus, Q2, is reconstructed based on the kinematics of the leading proton, and differential cross sections versus Q2 and the cross-section ratios of iron, lead, and carbon to scintillator are measured for the first time in a single experiment. The measurements show a dependence on the atomic number. While the quasielasticlike scattering on carbon is compatible with predictions, the trends exhibited by scattering on iron and lead favor a prediction with intranuclear rescattering of hadrons accounted for by a conventional particle cascade treatment. These measurements help discriminate between different mod...
14
artículo
Numeric methods are effective tools to solve science or engineering problems , which use deterministic differential equations. We have Euler’s and Heun’s methods and Runge- Kutta’s schemes. Unfortunately, these algorithms don’t work with stochastic differential equations. The main application is referred to the utilization of stochastic calculus in the financial area. The Black-Scholes and Merton model of the price values option in the financial markets is expressed by the Brownian movement and the stochastic differential equation, proposing the financial derivatives valorization by means of the stochastic calculus.
15
artículo
Numeric methods are effective tools to solve science or engineering problems , which use deterministic differential equations. We have Euler’s and Heun’s methods and Runge- Kutta’s schemes. Unfortunately, these algorithms don’t work with stochastic differential equations. The main application is referred to the utilization of stochastic calculus in the financial area. The Black-Scholes and Merton model of the price values option in the financial markets is expressed by the Brownian movement and the stochastic differential equation, proposing the financial derivatives valorization by means of the stochastic calculus.
16
artículo
We use a non-spatial (Chamberlinian) product differentiation model to analyze the welfare effects of horizontal mergers with quantity competition. We argue that (i) mergers can be welfare enhancing if the degree of product differentiation increases after the merger; and (ii) privately profitable mergers can also increase welfare. Consequently in this paper we demonstrate that the degree of product differentiation is a crucial factor to assess the welfare effects of a merger.
17
artículo
We use a non-spatial (Chamberlinian) product differentiation model to analyze the welfare effects of horizontal mergers with quantity competition. We argue that (i) mergers can be welfare enhancing if the degree of product differentiation increases after the merger; and, (ii) privately profitable mergers can also increase welfare. Consequently, in this paper we demonstrate that the degree of product differentiation is a crucial factor to assess the welfare effects of a merger.
18
artículo
Publicado 2022
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The confinement due to the coronavirus had effects after implementing virtual education at all educational levels. To identify the students' perception about the teaching-learning conditions that prevailed during COVID-19, distinguishing those that allowed them to continue learning from those that did not work in the academic areas of higher education in health sciences. And economic-administrative, exploratory, descriptive and correlational research was carried out with students from the Universidad Veracruzana de México. The sample consisted of 665 non-probabilistic and non-random with a general population. It was inquired about the teacher's teaching activities, learning, academic interaction, digital knowledge, new understanding acquired, socio-emotional difficulties experienced and management strategies, and the technological resources and connectivity used. Among other results, it...
19
artículo
Using the ordinary differential equation of motion it is possible to determine the position in time of a mass that moves because it is disturbed by some deterministic action. For this work it was proposed to model a mass supporting a random disturbance. To do this, it was required to model Brownian motion since it efficiently represents the randomness of the phenomenon. Using the fundamentals of Functional Analysis, Probability Theory and Stochastic Processes, a stochastic differential equation of motion was obtained. In order to extract solutions from this equation, the Euler-Maruyama method was used, which was implemented computationally. The results obtained showed that the use of a non-deterministic version to model movement generates satisfactory results and of interest to science.
20
artículo
Publicado 2021
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Implementation of model-based fault diagnosis systems can be a difficult task due to the complex dynamics of most systems, an appealing alternative to avoiding modeling is to use machine learning-based techniques for which the implementation is more affordable nowadays. However, the latter approach often requires extensive data processing. In this paper, a hybrid approach using recent developments in neural ordinary differential equations is proposed. This approach enables us to combine a natural deep learning technique with an estimated model of the system, making the training simpler and more efficient. For evaluation of this methodology, a nonlinear benchmark system is used by simulation of faults in actuators, sensors, and process. Simulation results show that the proposed methodology requires less processing for the training in comparison with conventional machine learning approache...
