In this work, a May-Holling-Tanner ratio-dependent predator-prey model is studied with an alternative food source for the predator, described by a two-dimensional system of ordinary differential equations. We study the existence and uniqueness of the solutions of the mentioned above system. In addition, the boundedness and positivity of these solutions are analyzed and we establish conditions for the local stability of a simplified model, through a differentiable equivalence. Likewise, the Python programming language is used to perform the simulations using the Runge-Kutta numerical method of order four with the aim of showing the different cases of qualitative analysis.

In the lab of tannery skins of the FCP, the ESPOCH was the comparison of tanning with extract of plant polyphenols in Caesalpinia Spinosa, with a mineral tanning of sulfate of chromium for goat skins, i.e. 2 treatments with 7 repetitions each one, and in two consecutive runs a total of 28 experimental units were modeled under a completely randomized design in bivariate array. The results indicate that the most suitable tanning was to use plant polyphenols Caesalpinia Spinosa, (tara), since it is possible to obtain very good classification leathers, nothing that the percentage of tensile strength and elongation (72.12%), (333.24 N/cm 2 ), not recorder differences however numerical superiority can be seen in (T1) vegetable tanned leathers, as for shrink temperature, (92,86ᵒ C), being highly significant differences. The sensory evaluation determines greater fullness (4.50 points), using t...

OBJETIVOS: Determinar factores asociados a ginecomastia en adolescentes de 10 a 15 años de edad en la Institución Educativa Emblemática San Ramón. MATERIAL Y MÉTODOS: El tipo de estudio fue observacional, analítico, seccional transversal. Mediante análisis estadístico bi variado, se calculó el Odds Ratio de cada factor y se elaboró un modelo de Regresión Logística para obtener el riesgo por OR controlando las variables estudiadas. RESULTADOS: Se estudiaron 300 adolescentes entre 11 y 15 años, la prevalencia de ginecomastia fue de un 12,3 % (37 adolescentes). Este estudio muestra una asociación significativa (p < 0.05) de los factores asociados a ginecomastia del adolescente como: la obesidad en un 5,3 % (16 adolescentes), el antecedente familiar de ginecomastia en un 1,67 % (5 adolescentes), el consumo excesivo de carne de pollo en un 8,3 % (25 adolescentes), el uso de loci...

Introduction: Obesity in children and adolescents is a public health problem that is increasing worldwide, being known its relation with the development of metabolic alterations like diabetes mellitus type 2. Objectives: To determine the presence of insulin resistance in obese and non obese adolescents according to sex, age, pubertal stage and presence of familial metabolic or cardiovascular disorders. Design: Cross-sectional observational and analytical study. Setting: Three Lima urban educational centers. Participants: Adolescents 10 to 17 year-old. Interventions: Sixty nine adolescents between 10 and 17 years old were divided in two groups according to the presence of obesity. Obesity was defined as body mass index >95th percentile, 55,1% were male and 44,9% female. Homeostatic model assessment was employed to determine insulin resistance (HOMA-IR) and beta cell function (HOMA%B) i...

In the lab of tannery skins of the FCP, the ESPOCH was the comparison of tanning with extract of plant polyphenols in Caesalpinia Spinosa, with a mineral tanning of sulfate of chromium for goat skins, i.e. 2 treatments with 7 repetitions each one, and in two consecutive runs a total of 28 experimental units were modeled under a completely randomized design in bivariate array. The results indicate that the most suitable tanning was to use plant polyphenols Caesalpinia Spinosa, (tara), since it is possible to obtain very good classification leathers, nothing that the percentage of tensile strength and elongation (72.12%), (333.24 N/cm 2 ), not recorder differences however numerical superiority can be seen in (T1) vegetable tanned leathers, as for shrink temperature, (92,86ᵒ C), being highly significant differences. The sensory evaluation determines greater fullness (4.50 points), using t...

El presente trabajo de investigación se enfoca en destacar la aplicación del aprendizaje basado en proyectos para el logro de aprendizajes significativos en estudiantes de educación superior, específicamente de la carrera de Diseño de interiores a través de la propuesta del Proyecto creativo “Manos a la obra”. El público al que va dirigido este proyecto son los estudiantes de la carrera de Diseño de Interiores del instituto superior privado ISIL. El desarrollo de los talleres contempla los siguientes temas: Impresión 3D y prototipado de productos, corte y ensamblado de aglomerados para la fabricación de mobiliario, pintura y renovación de mobiliario y finalmente, técnicas artísticas de pintado de paredes. Todos los temas tienen la característica principal de tener un corte novedoso y artístico-práctico. A partir del recojo de información teórica, se busca fundamenta...