Respuestas https://revistas.ufps.edu.co/index.php/respuestas <p>Respuestas Journal of Engineering Sciences, es una revista internacional cuatrimestral editada por la Universidad Francisco de Paula Santander Cúcuta – Ocaña. Respuestas tiene como propósito contribuir a la difusión de conocimiento científico en el campo de la Ingeniería y la Tecnología, específicamente en las áreas de Ciencia e ingeniería de materiales, Ingeniería Mecánica, Energías y Procesos, Ingeniería Civil y Arquitectura, Ingeniería Electrónica y telecomunicaciones, Ciencias de la computación, Ingeniería Industrial y de la Organización, Biotecnología e Ingeniería Agroindustrial y otras disciplinas de la ingeniería. Los trabajos sometidos a la revista deben ser de investigación, reflexión y revisión, los cuales pueden ser postulados en idioma español o inglés para su posterior revisión por pares, previo cumpliendo de las normas éticas, sin costo alguno por su procesamiento.&nbsp;</p> <p>Revista Indexada e Indizada por: <a href="http://scienti.colciencias.gov.co:8084/publindex/EnRevista/detalle.do?__tableName=enArticulo.table.allDetalle&amp;__tableAction=reset&amp;cod_revista_c=196&amp;categoria=" target="_blank" rel="noopener">Publindex (Categoría&nbsp;C)</a>, <a href="http://www.latindex.org/latindex/ficha?folio=13715" target="_blank" rel="noopener">Latindex</a>, Red Iberoamericana de Innovación y Conocimiento Científico - <a href="https://www.redib.org/recursos/Record/oai_revista2166-respuestas" target="_blank" rel="noopener">REDIB</a>,<a href="https://doaj.org/toc/2422-5053?source=%7B%22query%22%3A%7B%22filtered%22%3A%7B%22filter%22%3A%7B%22bool%22%3A%7B%22must%22%3A%5B%7B%22term%22%3A%7B%22bibjson.journal.volume.exact%22%3A%2220%22%7D%7D%2C%7B%22term%22%3A%7B%22bibjson.journal.number.exact%22%3A%221%22%7D%7D%2C%7B%22term%22%3A%7B%22index.issn.exact%22%3A%222422-5053%22%7D%7D%2C%7B%22term%22%3A%7B%22_type%22%3A%22article%22%7D%7D%5D%7D%7D%2C%22query%22%3A%7B%22match_all%22%3A%7B%7D%7D%7D%7D%2C%22from%22%3A0%2C%22size%22%3A100%7D" target="_blank" rel="noopener"> DOAJ</a>, <a href="https://dialnet.unirioja.es/servlet/revista?codigo=23933" target="_blank" rel="noopener"> DIALNET</a>,,&nbsp;Bielefeld Academic Search Engine <a href="https://www.base-search.net/Search/Results?lookfor=0122-820X&amp;type=all&amp;oaboost=1&amp;ling=0&amp;name=&amp;thes=&amp;refid=dcreses&amp;newsearch=1" target="_blank" rel="noopener">BASE</a>,&nbsp; Red de Bibliotecas Universitarias Españolas <a href="/ojs/index.php/respuestas/manager/saveSetup/catalogo.rebiun.org/rebiun/record/Rebiun20055265" target="_blank" rel="noopener">REBIUN</a>, PERIODICA.&nbsp;</p> <p><strong>Periodicidad:</strong> Cuatrimestral.</p> <p>ISSN: 0122-820X (PRINT), ISSN: 2422-5053 (WEB).</p> <p><strong>DOI: </strong><a href="https://doi.org/10.22463/issn.0122-820X" target="_blank" rel="noopener">https://doi.org/10.22463/issn.0122-820X</a></p> es-ES <h4 align="center">La Revista ofrece Acceso Abierto bajo una licencia Creative Commons Attibution License</h4><p align="center"><img src="/ojs/public/site/images/ojsadmin/88x312.png" alt="" align="center" /></p><p align="center">Esta obra está bajo una <a href="http://creativecommons.org/licenses/by/4.0/" rel="license">Licencia Creative Commons Atribución 4.0 Internacional</a>.</p> respuestas@ufps.edu.co (Jhan Piero Rojas Suárez) mar, 01 ene 2019 00:00:00 -0500 OJS 3.1.2.1 http://blogs.law.harvard.edu/tech/rss 60 Evaluación del modelo de hidrograma unitario SCS en la determinación de caudales máximos en cuencas de Norte de Santander https://revistas.ufps.edu.co/index.php/respuestas/article/view/1743 <p>En diversos estudios es necesario determinar la magnitud de caudales extremos en un río. Disponiendo de un adecuado registro histórico de caudales es posible ajustar una función de densidad de probabilidad (fdp) que permita estimar eventos asociados con un alto periodo de retorno (i.e. 100 años). En cuencas no-instrumentadas, como son la mayoría de cuencas en el mundo, se recurre a otras metodologías como por ejemplo el Hidrograma Unitario Sintético propuesto por el Servicio de Conservación de Suelos – USA (HU-SCS). Se evaluó el modelo HU-SCS en cuencas del departamento Norte de Santander (COL), en su capacidad para estimar caudales extremos, y explorar su posible regionalización. La evaluación se realiza mediante la comparación de estimaciones de Q100, mediante el método de Factores de Frecuencia y el modelo HU-SCS. Series temporales de caudal y precipitación se obtuvieron de la red IDEAM, seleccionando 19 cuencas en función de su área de drenaje, densidad de estaciones climatológicas y longitud del registro, caracterizadas geomorfológicamente utilizando ArcMap™ sobre el modelo digital de elevación ASTER-GDEM. Utilizando información disponible sobre geología, suelos, cobertura vegetal, y asumiendo una condición antecedente de suelo húmeda (AMC-III) se obtuvieron valores de la mediana del error relativo Q100 (ε-Q100) de +507% y +406%, para las fdp Gumbel y Log-Pearson. Para una condición antecedente de suelo seca (AMC-I) ε-Q100 bajo a +36% y +17%. Fue posible minimizar ε-Q100 mediante calibración del parámetro Número de Curva (CN). No se encontró una función de regionalización satisfactoria para CN. Aplicando SCS-HU para condición AMC-III se sobreestima en gran medida el Q100. Es posible minimizar el error al considerar AMC-I y reducir CN, situación contra-intuitiva pues caudales extremos se asocian con condiciones meteorológicas húmedas (i.e. Año Niña). Se debe investigar mejoras en la caracterización de la lluvia y suelos en Norte de Santander.</p> Leonardo Vargas Garay, Oscar David Torres Goyeneche, Gustavo Adolfo Carrillo Soto Derechos de autor 2019 http://creativecommons.org/licenses/by/4.0 https://revistas.ufps.edu.co/index.php/respuestas/article/view/1743 mar, 01 ene 2019 00:00:00 -0500 Structural characterization of post-consumption sludge as aggregates in construction materials https://revistas.ufps.edu.co/index.php/respuestas/article/view/1793 <p>The present work covers the physical, mechanical and chemical characterization of pozzolanic materials. The pozzolans were obtained by mixing red clay, commercial bentonite and residual aluminous sludge, from a drinking water treatment plant. Ceramic cubes were manufactured, which were sintered at 1100 ° C and subsequently, were structurally characterized by DRX, SEM and EDS. Its compressive strength was also evaluated before and after being subjected to different environments. The results showed that the relations with which the standards for nonstructural bricks according to NTC 4017 (100 Kgf / cm2) are maintained are those that contain 10%, 20% and 30% of mud with respect to the clay maintaining an aggregate of bentonite 10% with resistances of 123.62 Kgf / cm2, 112.90 Kgf / cm2 and 107.32 Kgf / cm2, respectively. Likewise, for units exposed to corrosive environments, the 10% replacement mixture is the only one that meets the criteria established by the standard with a resistance of 112,80 Kgf/cm2 and in abrasive environments mixtures of 10% and 20% with resistance of 116,75 Kgf/cm2 and 101,96 Kgf/cm2 respectively.</p> <p>&nbsp;</p> Giselle Carolina Barón-Gualdrón, Ángela Marcela Montaño-Angarita, Claudia Paulina Gonzalez-Cuervo, Carlos Alberto Rios-Reyes Derechos de autor https://revistas.ufps.edu.co/index.php/respuestas/article/view/1793 mar, 01 ene 2019 00:00:00 -0500 Evaluation of the plastic injection machine maintenance system through the TOPSIS method https://revistas.ufps.edu.co/index.php/respuestas/article/view/1794 <p>The following document talks about the parameters of the maintenance system implemented in plastic injection machines of a maquiladora company located in Ciudad Juarez Chihuahua. The method used in this investigation is essentially ulti-criteria decision making, the technique for the order of preference for similarity to the ideal TOPSIS solution. Therefore, an evaluation of the maintenance system is carried out, using measurable collected in said company. With this evaluation the plastic injection machine is determined in better conditions, as well as the machine in worse conditions, which helps management to make better decisions regarding each machine. The objective of this research is to address the study of decision-making in the industrial field specifically in the maintenance system of plastic injection molding machines.</p> Jesús Manuel Calvillo-Guevara, Luis Pérez-Domínguez, Luz Angélica Garcia Villalba Derechos de autor https://revistas.ufps.edu.co/index.php/respuestas/article/view/1794 mar, 01 ene 2019 00:00:00 -0500 Experimental prototype for visual support in the calibration of the precision indicator lights of approach slope, for a landing track using a drone https://revistas.ufps.edu.co/index.php/respuestas/article/view/1795 <p>Background: The use of calibration methods for visual aids systems in airports guarantees aviation safety with new alternatives and precision methods. Objective: The article shows the implementation of an experimental prototype for the support of visual aid in the calibration of precision indicator lights by means of a drone to improve the approach slopes of aircraft. Method: In each of the experimental tests the following activities were developed: a) execute the program that contains the code to perform the process of emulation / calibration of the lights, b) connect the model of the lights to the Arduino and be connected to the portable equipment, c) perform the drone calibration process each time a flight plan is made, d) connect the mobile device to the drone’s remote control to integrate them into the wireless network (Wi-Fi), e) on the device mobile the application is executed to configure the flight plan and f) the emulation / calibration is performed with the model of the lights. Result: Obtain the best visibility angles according to the effective percentages of experimentation that indicate the accuracy of the experimental system proposed through a mobile application. In addition, this article proposes a methodology for the calibration of the Precision Approach Path Indicator (PAPI) lights through wireless devices. Conclusion: The proposed methodology establishes the basic conditions for the development of the process of supervision, monitoring and calibration of the PAPI lighting system of any track in Colombia according to the regulations on luminous visual aids.</p> Jorge Enrique Herrera-Rubio, Sergio Andrés Parra-Prada Derechos de autor https://revistas.ufps.edu.co/index.php/respuestas/article/view/1795 mar, 01 ene 2019 00:00:00 -0500 Evaluation of damage to the lumbar spine vertebrae L5 by finite element analysis https://revistas.ufps.edu.co/index.php/respuestas/article/view/1804 <p>Bone metastasis to the spine, pelvis or hip in patients with prostate cancer is a pathology that occurs in approximately 80% of cases. Metastases in the spine can cause pain, instability and neurological injuries. Therefore, it is relevant to evaluate when critical conditions have been reached and the structural integrity of the bone is compromised. Numerical methods based on patient data, obtained through post-processing of medical images, provide a tool to model the complexity of the biological tissue material. Computed axial tomography (CT) together with segmentation tools allows the reconstruction of 3D bone models that include mechanical properties, and that represents the anisotropic condition of bone structures. In this work, we present the L5 lumbar vertebra model of a patient affected by metastases and evaluate biomarkers to indicate the level of damage, compared with the reference case of healthy bone in an initial stage.</p> Sergio Andrés Ardila-Parra, Heller Guillermo Sánchez-Acevedo, Octavio Andrés González-Estrada Derechos de autor https://revistas.ufps.edu.co/index.php/respuestas/article/view/1804 mar, 01 ene 2019 00:00:00 -0500 Behavior of an asphalt mixture MDC-19 under the cycles of ambient temperature in the city of Tunja, Colombia https://revistas.ufps.edu.co/index.php/respuestas/article/view/1803 <p>The weather factor plays an important role in the behavior and performance of asphalt mixtures as a surface layer in a flexible pavement structure, not just from the moisture, but also from the environmental temperature. Asphalt layers of the flexible pavements in Tunja city exposes daily to environmental temperature variations, which usually occur when the highest temperatures are reached during the daytime, and the lowest temperatures appear at night and early morning time. Firstly, this research is based , on the definition of the environmental temperature cycles that occur daily in Tunja City, from the analysis of the temperature series. Subsequently, the analysis was done through laboratory tests on an asphalt mix MDC-19 INVIAS type, made and compacted in the laboratory, to determine the influence of the cycles of environmental temperature on its density, stability and flow properties, during 120 daily and continuous temperature cycles, which consist of 12 hours of maximum temperature and 12 hours of minimum temperature to simulate the environmental conditions. As a result of this investigation, the presentation density is presented, presenting a tendency to increase the measurement that increases the temperature cycles and then a decrease in the briquettes of the mixture that have sometimes been until the last cycles. Variations in the resistance to deformation of the analysis mixture were obtained as the ambient temperature cycles were sometimes made, which concludes that the ambient temperature cycles have an influence on the behavior of the asphalt mixture.</p> Carol Rosabeth Sanabria-Sanabria, Carlos Hernando Higuera-Sandoval Derechos de autor https://revistas.ufps.edu.co/index.php/respuestas/article/view/1803 mar, 01 ene 2019 00:00:00 -0500 Liquid balance - steam for methanol mixing - Benzen using the Peng Robinson and Van-Laar models https://revistas.ufps.edu.co/index.php/respuestas/article/view/1807 <p>This paper is related to the procedure for calculating curves dew point and bubble point of a binary system, consisting of the methanol and benzene mixture to 45°C, using the Peng-Robinson cubic equation to calculate the fugacity coefficient of gas i in the mixture, and Van Laar model to calculate the activity coefficient of component i in the liquid mixture. Then a comparison between the theoretical data with the experimental data and later with the commercial simulator Hysys-<br>Aspen, which applies the model of Wilson. The simulation was validated with experimental data,in addition to comparing the results with a commercial simulator.</p> Miguel Fernando Palencia-Muñoz, Natalia Prieto-Jiménez, Germán González-Silva Derechos de autor https://revistas.ufps.edu.co/index.php/respuestas/article/view/1807 mar, 01 ene 2019 00:00:00 -0500 Choice of instructional design for the development of a learning environment in blended mode https://revistas.ufps.edu.co/index.php/respuestas/article/view/1808 <p>This article is a part of the research process for choosing an instructional design model within an educational institution of Higher Education in Colombia. It analyzes and reflects on different models of instructional design and before that sustains a definition and historical evolution of the different systems that have evolved the term of instructional design. With all the data and information required and on a basis consistent with the mission and vision of the institution Minute University Corporation of God, response and choice is given to a coherent model.</p> Doris Patricia Mora-Marín, Ilber Darío Saza-Garzón, Fernando Santamaría Derechos de autor https://revistas.ufps.edu.co/index.php/respuestas/article/view/1808 mar, 01 ene 2019 00:00:00 -0500 Analysis of energy and major components in chromatographic signals for the diagnosis of prostate cancer https://revistas.ufps.edu.co/index.php/respuestas/article/view/1809 <p>The prostate exam is an early detection tool to prevent prostate cancer and the main diagnostic tools for obtaining signs are generally invasive. This article tries chromatographic signals from the urine of prostate cancer patients and control patients as a non-invasive examination proposal. For this purpose, methodologically, urine samples are taken, digitized in chromatograms, treated with mathematical techniques and classified. The mathematical techniques are time normalization, dead time elimination, baseline correction, noise elimination, and peak alignment. Classification techniques analyze energy, in the domain of time and frequency, and the main components in sedimentation graphs and scores. As a result, the chromatographic signal is characterized and identifies the characteristic curve that represents the signal of prostate cancer patients and control patients. The data structure shows a cluster distribution of 88.88% of the vectors for the control patients. In the case of prostate cancer patients, the distribution of data is in clusters around the area defined by control patients. This characterization demarcates signal classification regions to diagnose possible prostate cancer patients, validating the relationship between the chromatographic signal and cancer.</p> Ángelo Joseph Soto-Vergel, Luis Enrique Mendoza, Byron Medina-Delgado Derechos de autor https://revistas.ufps.edu.co/index.php/respuestas/article/view/1809 mar, 01 ene 2019 00:00:00 -0500 Effect of the recycled rubber grain in the rutting of an asphalt mixture type MD-12 https://revistas.ufps.edu.co/index.php/respuestas/article/view/1810 <p>Currently in Colombia, a lot of used tires are generated which have not been provided with proper handling,for this reason, environmental problems are significant, therefore, there is a need to look for alternatives that encourage the reuse of waste from various recyclable materials and thus incorporate them into the production cycle, obtaining as a major benefit a reduction in the environmental impact caused by this type of waste. According to the above, the investigation analyzed the effect of the recycled rubber grain added by dry process, in the rutting of an asphaltic mixture type MD-12, through the plastic deformation resistance test standardized by the Instituto Nacional de Vías INVIAS 2013. The analysis was carried out using the Marshall methodology with the design of an asphalt mixture conventional MD-12 and three MD-12 asphalt mixtures with variations in the addition of GCR, the preliminary designs and verification of each of the asphalt mixes as established in the general construction specifications of the Instituto de Desarrollo Urbano IDU 2011, obtaining the respective working formula of each asphalt mixture. Obtaining favorable behaviors in asphalt mixtures with addition of 0.5% of GCR in which there are decreases of up to 5.3% in the rutting, with respect to the asphaltic mixture of reference, also it highlights the improvements that the asphalt mixture presented in terms of resistance to plastic deformation or rutting, before the addition of rubber grain recycled by dry process, for this reason it is recommended to use it in asphalt mixtures type MD-12 as part of the fine aggregate and thus obtain a greater efficiency from the mechanical point of view, as well as the improvements in the useful life of the pavement and the mitigation of the environmental impacts generated by the mishandling of tires out of use in the country.</p> Carlos Hernando Higuera-Sandoval, Brandon Nicolás Olarte-Riaño, Rubén David Soler-Sánchez Derechos de autor https://revistas.ufps.edu.co/index.php/respuestas/article/view/1810 mar, 01 ene 2019 00:00:00 -0500