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1
tesis de grado
Publicado 2022
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In the present investigation of the design of a processing machine for hybrid compounds based on coconut and maguey fibers, using the non-experimental quantitative method, under the German VDI 2221 and 2225 methodology, using mathematical models of machine elements and mechanical design and selection. of electronic components, where the main objective was the design of the hybrid compound processing machine, which consists of four processes: material transport, crushing process, mixing and compacting process, to obtain boards agglomerated, with the purpose of reusing usable solid waste and transforming it into fibers, in order to avoid the use of wood and to reduce the logging that occurs in the central jungle of Peru, for which it is essential to know the mechanical characteristics of coconut and maguey fiber, coconut fiber has a tensile strength of 220 Mpa and fiber Maguey has a tensil...
2
artículo
The use of machine learning algorithms in the field of nutritional health is a topic that has been developed in recent years for the early diagnosis of diseases or the recommendation of better nutritional habits. People with poor diets are more prone to chronic diseases and, in the long term, this can lead to dead. This study proposes a model for the recommendation of nutritional plans using the decision tree technique considering the patient data, in complement with the BMI (Body Mass Index) and BMR (Basal Metabolic Rate) to evaluate and recommend the best nutritional plan for the patient. The algorithm used in the model was trained with a dataset of meal plan data assigned by specialists which were obtained from the Peruvian food composition table, and the data from the diets that were assigned and collected from the nutrition area of the Hospital Marino Molina Sccipa in Lima, Peru. Pr...
3
tesis de grado
Publicado 2023
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This paper presents alternatives for the implementation of a Market Place called “Clic”, considering the technological infrastructure necessary for its operation based on Machine Learning algorithms. During the elaboration of this paper, surveys were conducted to both users qualified as "Clients" and "Professionals" about the intentionality of use and the probability of payment for the publication of their services in the platform. This paper presents the recommended steps for the composition of the Clic company, the way the information is collected for Machine Learning and the data obtained from the users, the recommended environments for the development of the application, the results of the surveys carried out, the feasibility of the Machine Learning algorithm, numerical data of financial feasibility for the execution of the project.
4
artículo
Publicado 2021
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The geometallurgical model is the result of the integration of the disciplines of geology, mining and metallurgy in order to add value and reduce risk in a process such as the flotation efficiency of chalcopyrite. The objective of this study was to calibrate models to quantify the content of clays and gangas of a hydrothermal deposit of the porphyry copper-gold type by NIR spectroscopy. The selected methodology was to design a chemometric model based on 173 diamond drill composites to which X-ray diffraction tests and near infrared spectroscopy were performed, validating the results with a cross-validation through a machine learning methodology. The creation of the models was carried out by means of a regularized non-linear regression by the Ridge method. Low linearity models were obtained for calcite and plagioclase minerals, with R2 values (0.51 and 0.78, respectively). The regression ...
5
tesis de maestría
Publicado 2023
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La presente investigación se basa principalmente en la implementación de un modelo de Inteligencia de Negocios basado en minería de opinión sobre comentarios a publicaciones expresados por usuarios en redes sociales. El modelo será implementado en una empresa corredora de seguros en el Perú. Uno de los grandes desafíos que enfrentan las empresas en la nueva era de la información es tener la capacidad de transformar los datos en información y convertir la información en conocimiento para la toma de decisiones. Asimismo, En los últimos años las empresas enfrentan nuevos desafíos como son: la innovación, el incremento de uso de internet, las redes sociales, los teléfonos inteligentes, la conectividad y la ubicuidad de las personas. Para lograr el éxito en la innovación es fundamental una profunda compresión de los clientes. Existen tres motivaciones para que las personas e...
6
tesis de grado
Publicado 2022
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La presente investigación consiste en realizar un estudio de pre factibilidad para la instalación de una planta productora de crema picante a base de aguaymanto con ají limo, partiendo del objetivo general de obtener un producto de calidad, nutritivo y precios competitivos. Este producto utiliza como insumos principales el aguaymanto, el cual es una fruta andina con altos nutrientes y beneficios para el desarrollo del cuerpo humano. Mientras que, el ají limo es considerando como uno de los ajíes más picantes del Perú y muy conocido como insumo esencial de diferentes platos típicos. Para esta investigación se realizó un estudio de mercado, para determinar el mercado objetivo y el área geográfica del desarrollo el proyecto. En primer lugar, se calculó la demanda potencial y Demanda de proyecto a través de data histórica de los últimos 7 años. La demanda proyectada será pa...
7
artículo
In vitro comparison of the immediate adhesive strength in dentin of three universal adhesive systems
Publicado 2018
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Objective: To compare the adhesive strength in dentin of three universal adhesive systems in vitro by means of the shear test. Materials and methods: Seventy-five bovine teeth were selected and cut. Dentin was exposed from the buccal surface of the crowns with 220 grit sandpaper, and samples were then inserted in transparent acrylic bases (15x10mm). The samples were randomly divided in 3 groups (n=25): G1-Universal adhesive system Scotchbond™ Universal (3M ESPE-USA); G2-Universal adhesive system Peak Universal Bond (Ultradent); G3-Universal adhesive system Tetric N-Bond (Ivoclar Vivadent). The adhesive procedures were carried out according to the instructions of each manufacturer and the restorative procedures were carried out with micro-cylinders (made of Tygon type tubing 0.79x1.5mm) of the composite resin Filtek™ Z350XT-A2 (3M ESPE-USA). The samples were incubated at 37ºC (+/-5º...
8
tesis doctoral
Publicado 2021
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Las entidades crediticias constantemente se enfrentan al problema de controlar el riesgo de crédito al que se exponen al desarrollar sus operaciones crediticias, en tal sentido, siempre han requerido apoyarse en modelos predictivos que les ayuden a tomar decisiones acertadas para la aceptación o el rechazo de una solicitud de crédito. Los modelos predictivos que emplean las instituciones financieras para calificar a los solicitantes de crédito son los conocidos modelos clásicos basados en técnicas estadísticas y los modelos basados en técnicas de máquinas de aprendizaje. En esta investigación, con el objetivo de clasificar a los solicitantes de microcrédito y contribuir a la mejora de la gestión del riesgo crediticio, se trabaja con la Base de datos de una Caja Municipal de Ahorro y Crédito (CMAC) que contiene 15,569 registros, cada uno con 27 variables, en donde las primera...
9
artículo
Publicado 2020
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Online comments have been a widespread feature in news media. Although audiences recognize it widely, doubts remain about the purpose of these interactive spaces. Arguably, understanding how media value online comments defines a way which public debates are socially perceived. Based on The Reuters Institute Digital News Report 2019, this article analysed current media policies towards online commenting in most accessed news websites in Portugal, Spain and Brazil. Following both a quantitative-qualitative methodology, a direct observation and a textual/visual analysis, this article highlights levels of similarity in these policies: comment sections are still predominantly available (31 from 45); comments are typically placed at the bottom of the page; the interactive options identical (share, like, dislike, report). As the overall cases exclude comment moderation, few media (in Portugal, ...
10
artículo
Marx, in works such as "The 18th Brumaire of Louis Bonaparte", "The Class Struggle in France" and "The German Ideology", exposes his vision of the State as a bureaucratic-military, centralized and coercive machine. He identifies the State as an instrument of class domination, structurally related to capital. Distinguishes between political regimes, highlighting the bourgeois Monarchy and the Republic as forms of bourgeois domination. Analyzes the Paris Commune as an example of workers' self-government and absorption of the State. He considers civil society as the engine of history and advocates workers' self-organization as the basis for transforming it and extinguishing the State. Marx focuses his thinking on "Capital", his magnum opus on the analysis of capitalism. Book I, published, deals with capitalist production and surplus value, while volumes II and III were completed by Engels. ...
11
artículo
Publicado 2021
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The objective of the article is to present the design and application of a technique based on the Cost - Volume - Benefit method, in order to have economic - financial information of the right mix of products that allows achieving the expected results of the organization in a negotiation process. The proposed analysis has the usual components of the Cost - Volume - Benefit method, namely unit price, unit variable cost, operating expenses and financial expenses. The technique consists of ten steps that will lead to create as many scenarios as necessary in which the mix of products, the installed capacity and the profits of the organization will be evaluated, the ultimate goal of the same. These steps, through the formulations that allow their application, will explain the way to achieve the desired profits or the point of balance with a certain composition of products. The application is ...
12
artículo
Publicado 2013
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Las fundiciones nodulares austemperadas poseen propiedades mecánicas más superiores que otros miembros de la familia de las fundiciones nodulares en lo que se refieren a aquinabilidad, resistencia a la tracción, resistencia al desgaste, tenacidad y ductilidad. En la primera etapa de esta investigación se busca obtener el material base hierro fundido nodular de una composición específica. Con este propósito, e l hierro fundido nodular será obtenido en un horno de crisol de 10 kg., empleando la energía calorífica que proviene del quemado del gas de propano (GLP), utilizando aleación de magnesio como nodulizante el cual se introducirá en el fondo del material fundido y como inoculante silicio (ferrosilico). El metal líquido colado en molde arena en forma de cuña. La evaluación de la microestructura del material fue realizada en la zona de menor grosor y en...
13
artículo
Publicado 2013
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Nodular cast iron austempered has superior mechanical properties than other family members of nodular cast iron in relation to properties like machinability, tensile strength, wear resistance, toughness and ductility.The first stage of this research seeks nodular cast iron base material of a specific composition. For this purpose, the nodular cast iron is obtained in a 10 kg crucible furnace using both heat energy of propane gas (LPG) and magnesium alloy as a catalytic agent which is added at the bottom of the molten material as inoculant silicon (ferrosilicon). The liquid metal mold casting sand is wedge shaped. The material microstructure evaluation was performed in both tin and thick areas as follows: a) On the wedge area of minor thickness, fringe pelletizing graphite, fringes with pearlite matrix and steatite were detected. b) On the wedge area of major thickness, gra...
