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Stabilization of clayey soils using asphalt emulsion and steel filings for subgrades 用沥青乳化液和钢屑加固路基的粘性土
Dyna-Colombia Pub Date : 2023-05-26 DOI: 10.15446/dyna.v90n226.105839
Amanda Gabriela Gálvez-Cooper
{"title":"Stabilization of clayey soils using asphalt emulsion and steel filings for subgrades","authors":"Amanda Gabriela Gálvez-Cooper","doi":"10.15446/dyna.v90n226.105839","DOIUrl":"https://doi.org/10.15446/dyna.v90n226.105839","url":null,"abstract":"This research evaluates the changes brought about by the addition of asphalt emulsion and steel filings in clayey soils for subgrade in urban pavements. For this study, different dosages of each additive were established, being 1%, 2%, 4%, 8%, and 15% for the steel filings and 3%, 6%, 9%, 13%, and 18% for the asphalt emulsion, obtaining favorable results in the subgrade in accordance with the CE.010 Urban Pavement standard. With the steel filings the CBR (California Bearing Ratio) had a linear increase whose maximum value was reached with the dosage of 15% increasing the CBR considerably by 189.47% above the CBR of the natural soil; on the other hand, with the asphalt emulsion a maximum increase in CBR was obtained with the dosage of 13% obtaining an increase of 236.84% and after that a decrease is observed with the addition of 18% of asphalt emulsion.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134974378","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}
引用次数: 0
A case study for the estimation of the hazard produced by landslides triggered by rainfall and seismic activity between Tunja and Guateque, Colombia 对哥伦比亚Tunja和Guateque之间的降雨和地震活动引发的滑坡造成的危害进行估计的案例研究
Dyna-Colombia Pub Date : 2023-05-26 DOI: 10.15446/dyna.v90n226.105904
María Fernanda Peñaloza-Rueda, July Katerine Rojas-Mesa, Luis Carlos Leguizamón-Barreto
{"title":"A case study for the estimation of the hazard produced by landslides triggered by rainfall and seismic activity between Tunja and Guateque, Colombia","authors":"María Fernanda Peñaloza-Rueda, July Katerine Rojas-Mesa, Luis Carlos Leguizamón-Barreto","doi":"10.15446/dyna.v90n226.105904","DOIUrl":"https://doi.org/10.15446/dyna.v90n226.105904","url":null,"abstract":"Debido a los problemas de inestabilidad de las laderas presentados en la vía que comunica la ciudad de Tunja con los municipios de Jenesano, Tibaná, Chinavita, Garagoa y Guateque, este trabajo se centró en la estimación de la amenaza por deslizamientos detonados por la precipitación y actividad sísmica en el corredor vial mencionado. Para este propósito se empleó un modelo que consideró la topografía, geología, parámetros geotécnicos y variables en términos de precipitaciones antecedentes, las cuales en ocasiones superaron los umbrales de falla definidos para la zona. De la misma manera, se aplicó técnicas de confiabilidad y el método probabilístico de primer orden segundo momento (FOSM), los cuales permitieron determinar las probabilidades de falla por actividad sísmica en condición saturada y no saturada para el cálculo de la probabilidad de falla total anual, a partir de la cual se categorizó la amenaza y se representó en Quantum GIS.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134974377","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}
引用次数: 0
Structural behavior of a seismic-isolated stadium grandstand considering hard and soft soil conditions 考虑软、硬土条件的隔震体育场看台结构性能
Dyna-Colombia Pub Date : 2023-05-26 DOI: 10.15446/dyna.v90n226.105469
Carlos Mario Piscal-Arévalo, Jesús D. Villalba-Morales, Xavier Hurtado, Diego Camilo Ángel-Giraldo, Camilo Andrés Rincón-Chuscano
{"title":"Structural behavior of a seismic-isolated stadium grandstand considering hard and soft soil conditions","authors":"Carlos Mario Piscal-Arévalo, Jesús D. Villalba-Morales, Xavier Hurtado, Diego Camilo Ángel-Giraldo, Camilo Andrés Rincón-Chuscano","doi":"10.15446/dyna.v90n226.105469","DOIUrl":"https://doi.org/10.15446/dyna.v90n226.105469","url":null,"abstract":"La principal aplicación del aislamiento sísmico a nivel mundial está en edificaciones y puentes, sin embargo, puede ser aplicada a cualquier estructura. La técnica, teóricamente, tiene limitaciones de uso por eficiencia, como en edificaciones altas y suelos blandos. En este artículo se estudia una estructura aislada no convencional, para evaluar los beneficios del aislamiento sobre esta. Específicamente se analiza una tribuna de estadio localizada en Colombia, con condiciones de suelo duro y blando. La estructura es importante, debido a su necesidad de mitigación del riesgo por sismo. Esta considerará un alto número de personas que deben evacuar de forma segura durante terremotos y después de estos, la estructura podría ser destinada a refugio humanitario. Los resultados a) muestran beneficio estructural principalmente en condiciones de suelo duro, b) corroboran y cuantifican las limitaciones de los suelos blandos y c) permiten generar algunas recomendaciones para aislar estructuras bajo las condiciones aquí estudiadas.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134974376","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}
引用次数: 0
Assessing soil temperature and moisture fluctuations under irrigated banana (Musa spp.) cultivation in response to coconut coir mulch cover 评估灌溉香蕉(Musa spp.)栽培土壤温度和湿度波动对椰壳覆盖的响应
Dyna-Colombia Pub Date : 2023-05-26 DOI: 10.15446/dyna.v90n226.105969
Renato Augusto Soares Rodrigues, João Luis Mendes Pedroso de Lima, Abelardo Antônio Assunção Montenegro, Thayná Alice Brito Almeida, José Roberto Lopes da Silva
{"title":"Assessing soil temperature and moisture fluctuations under irrigated banana (Musa spp.) cultivation in response to coconut coir mulch cover","authors":"Renato Augusto Soares Rodrigues, João Luis Mendes Pedroso de Lima, Abelardo Antônio Assunção Montenegro, Thayná Alice Brito Almeida, José Roberto Lopes da Silva","doi":"10.15446/dyna.v90n226.105969","DOIUrl":"https://doi.org/10.15446/dyna.v90n226.105969","url":null,"abstract":"The semiarid is characterized by extreme heat, which affects agricultural production by limiting the soil's ability to retain water. The objective of this study was to investigate the influence of mulch on soil temperature and soil moisture in a drip irrigated banana plantation in a Brazilian semiarid region. Six thermocouples and three soil moisture probes were used, with coconut coir as mulch. Daytime and nighttime surface temperatures were compared for two mulch densities (4 and 8 t ha-1) and bare soil. Soil temperature and moisture were measured at three depths (0.1, 0.3 and 0.5 m). The study was conducted from November 2014 to March 2015. Mulch had a buffer effect on soil temperature fluctuation. Drip irrigation management associated with mulch provided a uniform moisture profile close to field capacity.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134974379","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}
引用次数: 0
Classification of COVID-19 associated symptomatology using machine learning 使用机器学习对COVID-19相关症状进行分类
Dyna-Colombia Pub Date : 2023-05-25 DOI: 10.15446/dyna.v90n226.105616
Julian Andres Ramirez-Bautista, Silvia L. Chaparro-Cárdenas, Wilson Gamboa-Contreras, William Guerrero-Salazar, Jorge Adalberto Huerta-Ruelas
{"title":"Classification of COVID-19 associated symptomatology using machine learning","authors":"Julian Andres Ramirez-Bautista, Silvia L. Chaparro-Cárdenas, Wilson Gamboa-Contreras, William Guerrero-Salazar, Jorge Adalberto Huerta-Ruelas","doi":"10.15446/dyna.v90n226.105616","DOIUrl":"https://doi.org/10.15446/dyna.v90n226.105616","url":null,"abstract":"The health situation caused by the SARS-Cov2 coronavirus, posed major challenges for the scientific community. Advances in artificial intelligence are a very useful resource, but it is important to determine which symptoms presented by positive cases of infection are the best predictors. A machine learning approach was used with data from 5,434 people, with eleven symptoms: breathing problems, dry cough, sore throat, running nose, history of asthma, chronic lung, headache, heart disease, hypertension, diabetes, and fever. Based on public data from Kaggle with WHO standardized symptoms. A model was developed to detect COVID-19 positive cases using a simple machine learning model. The results of 4 loss functions and by SHAP values, were compared. The best loss function was Binary Cross Entropy, with a single hidden layer configuration with 10 neurons, achieving an F1 score of 0.98 and the model was rated with an area under the curve of 0.99 aucROC.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136345155","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}
引用次数: 0
Spatial variability and ecological risk assessment of heavy metals in surface sediments of the Unete River in the department of Casanare (Colombia) 哥伦比亚卡萨纳雷省Unete河表层沉积物重金属空间变异及生态风险评价
Dyna-Colombia Pub Date : 2023-05-25 DOI: 10.15446/dyna.v90n226.107126
Karen Baños-Niño, José Alfredo Camargo-Martínez, Mercedes Díaz-Lagos
{"title":"Spatial variability and ecological risk assessment of heavy metals in surface sediments of the Unete River in the department of Casanare (Colombia)","authors":"Karen Baños-Niño, José Alfredo Camargo-Martínez, Mercedes Díaz-Lagos","doi":"10.15446/dyna.v90n226.107126","DOIUrl":"https://doi.org/10.15446/dyna.v90n226.107126","url":null,"abstract":"Surface sediment samples obtained from 46 sites of the Unete River in Casanare (Colombia) were analyzed to evaluate the concentrations of the heavy metals As, Cu, Ni, Pb and Zn as well as to determine their geographic spatial distribution and potential ecological risk. The measured concentrations were compared with the background values (BV), threshold effect concentration (TEC) and probable effect concentration (PEC) from consensus-based Sediment quality criteria guidelines (SQGs) for heavy metals in freshwater ecosystems in order to determine the level of concern of the contaminant concentrations. Based on these results and on the indices of determined potential ecological risk, As and Pb were shown to be the heavy metal contaminants of most concern in surface sediments. The possible sources causing the concerning concentrations were then discussed.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136345153","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}
引用次数: 0
Support vector machines implementation over integers modulo-M and Residue Number System 支持向量机在整数模m和余数系统上的实现
Dyna-Colombia Pub Date : 2023-05-25 DOI: 10.15446/dyna.v90n226.107112
Sergio Andrés Arenas-Hoyos, Álvaro Bernal-Noreña
{"title":"Support vector machines implementation over integers modulo-M and Residue Number System","authors":"Sergio Andrés Arenas-Hoyos, Álvaro Bernal-Noreña","doi":"10.15446/dyna.v90n226.107112","DOIUrl":"https://doi.org/10.15446/dyna.v90n226.107112","url":null,"abstract":"In low-power hardware implementations for classification algorithms, it is often essential to use physical resources efficiently. In this sense, the use of modulo-M integer operations instead of floating-point arithmetic, can lead to better performance, especially when M represents the dynamic range of an arithmetic block of the Residue Number System (RNS) [1,2]. Following this premise, this work is aiming to provide a methodology for implementing a classifier, specifically a Support Vector Machine (SVM) [3], using modulo-M integers and proposing a method for the use of Residue Number System.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":"351 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136345154","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}
引用次数: 0
Domestic wastewater treated with Sagittaria latifolia in constructed wetlands 人工湿地对生活污水的处理
Dyna-Colombia Pub Date : 2023-05-25 DOI: 10.15446/dyna.v90n226.105263
Gaspar López-Ocaña, Anel Magaña-Flores
{"title":"Domestic wastewater treated with Sagittaria latifolia in constructed wetlands","authors":"Gaspar López-Ocaña, Anel Magaña-Flores","doi":"10.15446/dyna.v90n226.105263","DOIUrl":"https://doi.org/10.15446/dyna.v90n226.105263","url":null,"abstract":"Constructed wetlands are viable alternatives for the removal of multiple pollutants. The performance of Sagittaria latifolia in free flowing and subsurface wetlands in removing pollutants from domestic waters was evaluated. 12 wetlands will be followed, three free with species and three without species, three subsurface with species and three without species, with retention times of 6.7 days for the free and 3.5 days for the subsurface. The subsurface with species presented an effluent with turbidity of 4.4±0.8 NTU, color of 143.9±27.4 UC and 33.9±25.7 mgL-1 of COD. The free samples with species presented turbidity of 10.1±2.8 NTU, color of 346.3±87.0 UC and 74.7±30.0 mgL-1 of COD. The wetland with the best performance was the subsurface with species, eliminating turbidity, color, and COD in 95.9, 89.4, 95.7% respectively, obtaining a COD kinetic coefficient of 0.34 (free flow) and 0.89 days-1 (subsurface).","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136345156","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}
引用次数: 0
Technology management. Design and manufacture of a heatsink 技术管理。散热器的设计与制造
Dyna-Colombia Pub Date : 2023-05-25 DOI: 10.15446/dyna.v90n226.104063
Salvador Montesinos-González, Carlos Vázquez-Cid-de León, José Ernesto Domínguez-Herrera, Gerardo Israel Palafox-Alvarado
{"title":"Technology management. Design and manufacture of a heatsink","authors":"Salvador Montesinos-González, Carlos Vázquez-Cid-de León, José Ernesto Domínguez-Herrera, Gerardo Israel Palafox-Alvarado","doi":"10.15446/dyna.v90n226.104063","DOIUrl":"https://doi.org/10.15446/dyna.v90n226.104063","url":null,"abstract":"El objetivo principal de esta investigación es estudiar y analizar la gestión de la tecnología y la innovación a través de la fabricación de un disipador térmico para transistores de potencia IGBT que se adapten a un convertidor CD/CD. Este trabajo consta de cuatro etapas: planificación, diseño, modelado y fabricación. Se asume que la fabricación de un producto innovador requiere garantizar la satisfacción del cliente, ya que se definieron criterios funcionales (requisitos) como en disminuir la temperatura a menos de 50 ° C, la disipación de calor se realiza por convección natural o convección forzada. Criterios no funcionales, como fácil transporte con un peso inferior a 2,5 kg. dimensiones inferiores a 0,32 m de largo, 0,217 m de ancho y 0,09 cm de alto. Además, el material acondicionado es cobre o aluminio o el uso de ambos. Para lograrlo, se utilizó la metodología de Pugh.","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136345157","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}
引用次数: 0
RAPID OPTIMIZATION OF DISINFECTANTS BY PHOTOGRAPHIC IMAGE-BASED ANALYSIS AND DESIGN OF EXPERIMENTS 基于摄影图像分析和实验设计的消毒剂快速优化
Dyna-Colombia Pub Date : 2023-05-22 DOI: 10.6036/10666
Jorge Salvador Carlos, B. Valdez Salas, Ernesto Alonso BELTRAN PARTIDA, M.A. Curiel Alvarez, N. Cheng, Ernesto VALDEZ SALAS
{"title":"RAPID OPTIMIZATION OF DISINFECTANTS BY PHOTOGRAPHIC IMAGE-BASED ANALYSIS AND DESIGN OF EXPERIMENTS","authors":"Jorge Salvador Carlos, B. Valdez Salas, Ernesto Alonso BELTRAN PARTIDA, M.A. Curiel Alvarez, N. Cheng, Ernesto VALDEZ SALAS","doi":"10.6036/10666","DOIUrl":"https://doi.org/10.6036/10666","url":null,"abstract":"The current pandemic of coronavirus disease 2019 (COVID-19) introduced the need for the development and optimization of new alcohol-water based disinfectant formulations. Moreover, the limited supply chain of traditional active ingredients such as ethanol (EtOH) has excessively increased the base formula cost, thus, novel platforms are needed to design new strategies for disinfectant development. In this work, we devise a novel quantification method of disinfectant turbidity and foam thickness based on photographic image analysis of disinfectant to optimize formula preparation, which improves critical physicochemical parameters related to colloidal stability. Next, the numerical data obtained from the pixel photograph's values were ordered by applying a 24 factorial design, considering each disinfectant ingredient, followed by an analysis of variance (ANOVA) and counter with contour and surface plots, respectively. Furthermore, our novel method was validated using a linear regression test, consequently outlining the method's error value. Our results suggest that the photographic image analysis supported by the statistical model correlated satisfactorily with the real physicochemical behavior of disinfectant, showing that the EtOH-H2O system plays a crucial role in turbidity and foam height control. In addition, we predicted by Minitab Optimizer Tool the physicochemical and aesthetic conditions of the disinfectant, having an error of 5%. Our current approach opens up a novel path to incorporate novel active ingredients for a rapid formulation and potentially scalable method to fabricate disinfectants.\u0000\u0000Keywords: image analysis, factorial design, disinfectant, foaming, active ingredients, optimization","PeriodicalId":50565,"journal":{"name":"Dyna-Colombia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48589703","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}
引用次数: 0
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