Revista Politecnica最新文献

{"title":"Abandono y permanencia escolar de las infancias Awá del resguardo el Gran Sábalo en tiempos de pandemia","authors":"Viviana Marcela Rodriguez-Caicedo, Anyeli Lisbeth Mera-Guerrero, Carolain Nathalia Tello-Estrada","doi":"10.33571/rpolitec.v19n38a6","DOIUrl":"https://doi.org/10.33571/rpolitec.v19n38a6","url":null,"abstract":"La pandemia por el  coronavirus genero efectos globalizados en sectores como el  educativo, que llevaron a la elección de caminos decisivos en la vida académica, social y emocional de la infancia; como fueron la permanencia y el abandono educativo.  Este documento es el resultado de un análisis de diversas fuentes y actores, que exponen las numerosas dificultades del proceso educativo durante tiempos de pandemia; busca  la interpretación del impacto de la pandemia sobre el abandono o permanencia escolar en las infancias de la Comunidad Indígena Awá del resguardo el Gran Sábalo, con el fin de generar una propuesta pedagógica que cobije la infancia y promueva la estabilidad en el desarrollo integral de estas culturas indígenas.\u0000The coronavirus pandemic generated globalized effects in sectors such as education, which led to the choice of decisive paths in the academic, social, and emotional life of children; as were the permanence and educational abandonment. This document is the result of an analysis of various sources and actors, who expose the many difficulties of the educational process during times of pandemic; seeks to interpret the impact of the pandemic on school dropout or permanence in the childhood of the Awá Indigenous Community of the Gran Sábalo reservation, in order to generate a pedagogical proposal that covers childhood and promotes stability in the integral development of these indigenous cultures","PeriodicalId":34134,"journal":{"name":"Revista Politecnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44016639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Caracterización del río Tota (parte alta), por medio de variables fisicoquímicas y los macroinvertebrados acuáticos.","authors":"Juan David Rincón-Silva, Yimmy Montoya-Moreno","doi":"10.33571/rpolitec.v19n38a7","DOIUrl":"https://doi.org/10.33571/rpolitec.v19n38a7","url":null,"abstract":"Esta investigación busco conocer las condiciones ecológicas de la cuenca alta del río Tota (Boyacá), en donde se realizaron 3 muestreos en 6 estaciones entre mayo a julio del 2021. Las variables fisicoquímicas no mostraron una variabilidad significativa, se evidenció el predominio de algunos grupos (familia Hyallelidae) y cambios en la riqueza de taxones. Se encontraron 1694 individuos pertenecientes a 15 familias y a 7 órdenes. El río Tota evidenció ser oxigenado, frío, poco mineralizado y con un pH ligeramente básico. Los valores del índice BMWP/Col se encontraron entre crítico y aceptable, con un promedio de 47(calidad aceptable). Se evidenció bajos valores de tolerancia a la variación de las condiciones fisicoquímicas en las familias Hydrobiosidae, Perlidae, Chrysomelidae, Tabanidae, Scirtidae, Baetidae, Hyalellidae y Ptilodactylidae; las familias que estarían asociadas a mayores niveles de tolerancia  de las características fisicoquímicas (indicadoras de menor calidad del agua), fueron las familias Muscidae, Elmidae, Ceratopogonidae, Simuliidae.\u0000This research seeks to know the ecological conditions of the upper basin of the Tota river (Boyacá), where 3 samplings were carried out in 6 stations between May and July 2021. The physicochemical variables did not show significant variability, the predominance of some groups (Hyallelidae family) is evident and changes to the richness of taxa. 1694 individuals belonging to 15 families and 7 orders were found. Tota river show to be oxygenated, cold, little mineralized and with a slightly basic pH. The values BMWP/Col index are between critical and acceptable, with an average value of 47 (acceptable quality). Low values ​​​​of tolerance to the variation of the physicochemical conditions were evidenced in the families Hydrobiosidae, Perlidae, Chrysomelidae, Tabanidae, Scirtidae, Baetidae, Hyalellidae and Ptilodactylidae; the families that would be associated with levels of tolerance to greater fluctuations of the aquatic physicochemical characteristics, such as the families Muscidae, Elmidae, Ceratopogonidae, Simuliidae.","PeriodicalId":34134,"journal":{"name":"Revista Politecnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47636273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluación de memoria de trabajo en estudiantes universitarios durante la práctica empresarial","authors":"Marta Cardona-Ochoa, Liliana Echeverri-Ochoa, Paula García-Giraldo","doi":"10.33571/rpolitec.v19n38a8","DOIUrl":"https://doi.org/10.33571/rpolitec.v19n38a8","url":null,"abstract":"Se presentan los resultados de una investigación de corte descriptivo que evalúa la función ejecutiva memoria de trabajo en estudiantes del programa de Tecnología en Gestión Industrial del Politécnico Colombiano Jaime Isaza Cadavid al inicio y al final de la práctica empresarial. La medición se realiza con instrumentos de la prueba psicológica WAIS IV, y el análisis estadístico, con el programa Minitab. La media para “Sucesión de números y letras” al inicio es de 17,139 y al final de 19,444, y para “Retención de dígitos” es de 25,903 al inicio y 27,161 al final. Los resultados de las pruebas psicométricas se asociaron con datos obtenidos en la caracterización referentes a género y edad sin presentar una correspondencia directa. En conclusión, los estudiantes mostraron cambios positivos de la memoria de trabajo en las mediciones de principio y final de la práctica; sin embargo, se mantuvieron dentro de la media poblacional.\u0000Here are presented the results of a descriptive investigation that evaluates the executive function of working memory in students of the Technology in Industrial Management program of the Colombian Polytechnic Jaime Isaza Cadavid at the beginning and at the end of the business practice. The measurement is carried out with the WAIS IV psychological test instruments, and the statistical analysis, with the Minitab program. The average for \"Sequence of numbers and letters\" at the beginning is 17,139 and at the end of 19,444, and for \"Digit retention\" it is 25,903 at the beginning and 27,161 at the end. The results of the psychometric tests were associated with data obtained in the characterization referring to gender and age without presenting a direct correspondence. In conclusion, the students showed positive changes in working memory in the measurements at the beginning and end of the practice; however, they remained within the population mean.","PeriodicalId":34134,"journal":{"name":"Revista Politecnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48848695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Análisis de los componentes relacionados en programación competitiva: un mapeo sistemático de literatura","authors":"Jennyfer Estefania Oliva-Caipe, Yuli Esmeralda Sinza-Diaz, Sandra Marcela Guerrero-Calvache","doi":"10.33571/rpolitec.v19n38a14","DOIUrl":"https://doi.org/10.33571/rpolitec.v19n38a14","url":null,"abstract":"La programación competitiva se aborda como un deporte mental en el que los participantes resuelven problemas algorítmicos y matemáticos mediante la programación. El objetivo principal de este artículo es determinar las características y elementos necesarios para el entrenamiento en programación competitiva, a través de un mapeo sistemático de la literatura basado en el protocolo de Petersen, Feldt y otros. Se identificaron un total de 128 estudios, de los cuales se seleccionaron 17 para el análisis de información, siguiendo el proceso descrito en el presente documento. Como resultado, se logra conocer los aspectos relevantes relacionados con la programación competitiva y su aprendizaje, incluyendo conceptos como jueces, plataformas, veredictos, tipos de ejercicios, metodologías aplicadas y la importancia de la práctica y participación en competencias de programación. Estas investigaciones permitieron responder a seis interrogantes planteados, concluyendo la importancia de establecer un marco de trabajo para el entrenamiento en programación competitiva.\u0000Competitive programming is approached as a mental sport in which participants solve algorithmic and mathematical problems through programming. The main objective of this article is to determine the characteristics and elements necessary for training in competitive programming, through a systematic mapping of the literature based on the Petersen, Feldt et al. protocol. A total of 128 studies were identified, of which 17 were selected for information analysis, following the process described in this document. As a result, it is possible to know the relevant aspects related to competitive programming and its learning, including concepts such as judges, platforms, verdicts, types of exercises, applied methodologies and the importance of practice and participation in programming competitions. This research allowed us to answer six questions, concluding the importance of establishing a framework for training in competitive programming.","PeriodicalId":34134,"journal":{"name":"Revista Politecnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43006723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimización de Isotermas de adopción mediante Simulated Annealing","authors":"J. Pellegrini, J. de Celis","doi":"10.33571/rpolitec.v19n38a2","DOIUrl":"https://doi.org/10.33571/rpolitec.v19n38a2","url":null,"abstract":"El presente trabajo estudia el ajuste de los datos experimentales de las isotermas de adsorción en un sistema de cromo hexavalente como adsorbato y carbón activado como adsorbente. Los ensayos de adsorción consistieron en poner en contacto 0,1 gramo de adsorbente con soluciones de diferente concentración de cromo hexavalente durante 48 h a distintas temperaturas. Para el modelado se propuso un método distinto al tradicional, mediante el cual se optimiza la energía de activación de la adsorción de manera que se generen las contantes de equilibrio que minimicen el error cuadrático medio respecto a los datos experimentales. Para ello, se empleó Simulated Annealing como algoritmo de optimización. Una temperatura inicial de 1000, 10000 iteraciones y un tamaño de paso de 0,05 fueron los parámetros utilizados. Ambos métodos presentan ajustes adecuados, mostrando energías de activación del mismo orden. Esto indicaría que el algoritmo de optimización sería comparable a los procedimientos tradicionales. \u0000 \u0000The present work studies the adjustment of the experimental data of the adsorption isotherms in a system of hexavalent chromium as adsorbate and activated carbon as adsorbent. The adsorption tests consisted of using 0.1 gram of adsorbent with solutions of different concentrations of hexavalent chromium for 48 h at different temperatures. For the modeling, a method different from the traditional one was proposed, where the adsorption activation energy is optimized to generate the equilibrium constants that minimize the mean square error with respect to the experimental data. For this, Simulated Annealing was used as the optimization algorithm. An initial temperature of 1,000, 10,000 iterations, and a step size of 0.05 were the parameters used. Both methods present adequate adjustments, showing activation energies of the same order. This would indicate that the optimization algorithm would be comparable to traditional procedures.","PeriodicalId":34134,"journal":{"name":"Revista Politecnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45942761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Web User Interface Design of a Visual Editor for Cloud Infrastructure Modeling","authors":"Carlos Iñiguez, Julio Sandobalín","doi":"10.33333/rp.vol52n1.09","DOIUrl":"https://doi.org/10.33333/rp.vol52n1.09","url":null,"abstract":"Cloud computing has evolved the way IT technicians manage infrastructure resources to support software applications. Leasing equipment and services from cloud infrastructure providers, such as Amazon Web Services, Microsoft Azure, etc., has replaced the traditional strategy of locally installing expensive equipment. Nowadays, IT technicians model the infrastructure they need by writing scripts, then running these scripts in the provider web platform. However, writing scripts becomes a complex task that involves interacting with the Command Line Interface and knowing the commands each provider imposes. In this context, replacing textual with visual interaction becomes a need. The purpose is to fesign the user interface (UI) of a visual web editor to model the cloud infrastructure resources. The User-Centered Design (UCD) methodology was applied to design the UI. As part of DCU, a study of the UIs of diagramming online tools was conducted to identify UI design patterns; those that expert designers use when designing visual editors.The results show that a set of 11 UI patterns for designing visual editor UIs was defined. In addition, a pattern language was built considering the relationships between patterns. By using the pattern language, the visual editor UI design was composed. As conclusions, the pattern language provided a logical way to compose the visual editor UI. In this sense, the proposed UI together with the pattern language can become a reference point for designing UIs in this domain. In future work, the effectiveness of the UI in reducing the complexity of defining the cloud infrastructure will be evaluated with user tests.","PeriodicalId":34134,"journal":{"name":"Revista Politecnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44624970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"VARVO: a Novel Method for the Fast Detection of Vehicle Crash Events from Video Only Data","authors":"Mario Moreno Pallares, S. Yoo, Wilbert G. Aguilar","doi":"10.33333/rp.vol52n1.03","DOIUrl":"https://doi.org/10.33333/rp.vol52n1.03","url":null,"abstract":"Around 1,35 million people worldwide die each year because of traffic incidents, and it is estimated that another 50 million suffers serious injuries. This picture is particularly dramatic in the Andean Region where the death toll due to traffic accidents is as high as 127 deaths per million inhabitants. In recent years the deployment of the so-called Intelligent Transport Systems (ITS) across several developed countries has helped to reduce the number of deaths due to traffic accidents. An integral part of an ITS is the automatic detection of traffic incidents from video and sensor data. However, the scarcity of curated datasets, especially those that contained a reasonable number of positive instances of traffic incidents is hampering the development of artificial intelligence applications for the domain of traffic research. Given this scenario, we pursued answering the following research question: is it possible to detect car crashes through supervised machine learning based on the estimated speeds of cars from video only-data? Here we present VARVO, a novel algorithm for the detection of traffic incidents that does not rely on sensors for cars speed detection. VARVO performs a supervised classification task based on the sequential use of convolutional network-based object detection and bi-directional tracking. We also describe how the models implemented in VARVO improved their classification accuracy by applying an oversampling algorithm to deal with class imbalance. We believe that the deployment of VARVO could be linked to static traffic video cameras and could be part of the Intelligent Transport Systems foundations in other Andean countries.","PeriodicalId":34134,"journal":{"name":"Revista Politecnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43567548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strength of Concrete Using Partial Addition of Residual Wood Ash with Respect to Cement","authors":"Juan Martín García Chumacero, Guillermo Arriola, Luigi Italo Villena Zapata, S. P. Muñoz Pérez","doi":"10.33333/rp.vol52n1.05","DOIUrl":"https://doi.org/10.33333/rp.vol52n1.05","url":null,"abstract":"Wood ash is a residue from the artisanal brick burning process that is produced in the poorest areas of Peru. It is a major problem because there is no management of this type of solid waste and it contaminates large sectors of the population. In this sense, it is important to use sustainable natural elements such as wood ashes that can contribute to the performance of concrete. For this reason, the objective of this research was to evaluate the influence of the incorporation of wood ash on the mechanical properties of concrete, with incorporations of 8%, 12% and 16%, as a function of the weight of cement, for which cylindrical specimens and beams were prepared. The results with respect to slump and unit weight were considerably reduced below their standard samples, unlike the temperature, which had increases that ranged between 3°C. On the other hand, the combined mixture of 8% wood ash resulted in the highest compressive strength, reaching 308,73 kg/cm2 which represents an increase of 9,04% with respect to the standard sample, while the flexural strength was 45,32 kg/cm2 representing an increase of 5,96% with reference to the standard sample. It is concluded that the addition of wood ash significantly improves the mechanical properties of concrete with an optimum dosage of 8%, the result contributes to make it technically feasible as an addition in the elaboration of sustainable concrete in civil construction.","PeriodicalId":34134,"journal":{"name":"Revista Politecnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41739684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estudio de las Características Mecánicas de Fibras de Bambú para la Fabricación de Piezas Automotrices","authors":"Carlos Segovia, V. Hidalgo, Jorge Melo, Ignacio Benavides, Juan Segovia","doi":"10.33333/rp.vol52n1.06","DOIUrl":"https://doi.org/10.33333/rp.vol52n1.06","url":null,"abstract":"Los estudios de materiales compuestos juegan un papel importante en aplicaciones de ingeniería, metalurgia, mecánica y actualmente una alternativa en la fabricación de piezas automotrices. Las fibras naturales reforzadas con polímeros presentan ciertos beneficios como bajo costo, bajo peso, son renovables y son fáciles de procesar. El objetivo de este trabajo es caracterizar el material compuesto con polímeros reforzados con fibras de bambú, para su aplicación en la fabricación de piezas automotrices. Para los ensayos se fabricó probetas de material compuesto de fibra de bambú en proporciones del 75% y 60% con resina epóxica en proporciones de 25 % y 40% dispuestas en 2 y 3 capas. Los resultados en proporción fibra de bambú (75%) – resina epóxica (25%) mostraron un mejor comportamiento mecánico a flexión en un 7,7 % respecto a otras fibras naturales como fibra natural larga de cabuya con fibra de vidrio, lo que se traduce en un aumento de rigidez de los materiales caracterizados, corroborando así, que es un potencial refuerzo de material híbrido alternativo para aplicaciones automotrices. Los resultados de los esfuerzos de tracción fueron validados mediante el método de elementos finitos FEM.","PeriodicalId":34134,"journal":{"name":"Revista Politecnica","volume":"411 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41281128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of the properties of an orthotropic GFRP deck on the dynamic response of a hybrid road bridge","authors":"Christian Gallegos-Calderón, Javier Oliva Quecedo, M. D. G. Pulido, J. Goicolea","doi":"10.33333/rp.vol52n1.08","DOIUrl":"https://doi.org/10.33333/rp.vol52n1.08","url":null,"abstract":"The use of multicellular Glass Fiber Reinforced Polymer (GFRP) deck panels in the rehabilitation and construction of bridges has increased over the last 30 years due to several benefits, such as: low maintenance cost, fast installation, corrosion resistance, and high strength-to-weight ratio. Due to the orthotropic nature of GFRP decks and their complex cross-section geometry, expensive computational problems may be obtained when bridges that include these elements are analyzed under traffic loads. Therefore, this paper studies the dynamic response of a GFRP-steel road bridge modelling the multicellular GFRP deck as an orthotropic plate. For this purpose, a finite element model of the hybrid structure is developed, and a sensitivity analysis is carried out to investigate the influence of the mechanical properties of the orthotropic element on the bridge behavior. The roughness of the pavement, the degree of composite action between the deck and the stringers, the multibody dynamic model of a truck, and the vehicle-bridge interaction phenomenon are included in the analyses. Results indicate that the most relevant properties of the orthotropic plate on the response of the structure are the modulus of elasticity in the longitudinal direction, the modulus of elasticity in the transverse direction, and the shear modulus. Also, achieving a full composite action and avoiding deterioration of road are identified as key aspects to reduce the vibration levels on the hybrid bridge.","PeriodicalId":34134,"journal":{"name":"Revista Politecnica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45148934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}