Pub Date : 2022-12-26DOI: 10.19053/01211129.v31.n62.2022.14839
Francy-Idaly Muelas-Muelas, Laura-Camila Narváez-Jiménez, C. Pardo-Calvache
During the last two decades, the application of Goal-Oriented Requirements Engineering has increased in software projects, mainly because this approach is useful during the requirements analysis process and supports the realization of tasks such as requirements elaboration, validation, and planning, and can be used as part of the system life cycle, e.g. architecture and design of behavioral processes, coding, testing, monitoring, adaptation and evolution. Several approaches addressing goal-oriented requirements have already been proposed. Currently, there are several concerns about how to correctly adopt and implement it in current industrial contexts, such as agile approaches and, more specifically, its integration with user stories and acceptance criteria. This study presents a compilation of the current knowledge on adopting GORE in agile requirements specification through user stories and their acceptance criteria. A systematic mapping study guided by ten research questions was conducted, and nine primary studies were selected considering the selection criteria. The results obtained show some initiatives as goal-oriented modelling languages in different proposals for transforming goal-oriented models into user stories, among them: i* (i-star), Tropos, KAOS, GRL, AOM, and Goal Net. This study provides a solid basis for classifying existing and future approaches in the application of GORE. Researchers and practitioners can use this mapping to identify existing technical/research gaps to better address and assess their own contributions or understand existing ones.
{"title":"Agile Functional Requirements Modeling from Goal-Oriented Requirements Engineering: A Systematic Mapping Study","authors":"Francy-Idaly Muelas-Muelas, Laura-Camila Narváez-Jiménez, C. Pardo-Calvache","doi":"10.19053/01211129.v31.n62.2022.14839","DOIUrl":"https://doi.org/10.19053/01211129.v31.n62.2022.14839","url":null,"abstract":"During the last two decades, the application of Goal-Oriented Requirements Engineering has increased in software projects, mainly because this approach is useful during the requirements analysis process and supports the realization of tasks such as requirements elaboration, validation, and planning, and can be used as part of the system life cycle, e.g. architecture and design of behavioral processes, coding, testing, monitoring, adaptation and evolution. Several approaches addressing goal-oriented requirements have already been proposed. Currently, there are several concerns about how to correctly adopt and implement it in current industrial contexts, such as agile approaches and, more specifically, its integration with user stories and acceptance criteria. This study presents a compilation of the current knowledge on adopting GORE in agile requirements specification through user stories and their acceptance criteria. A systematic mapping study guided by ten research questions was conducted, and nine primary studies were selected considering the selection criteria. The results obtained show some initiatives as goal-oriented modelling languages in different proposals for transforming goal-oriented models into user stories, among them: i* (i-star), Tropos, KAOS, GRL, AOM, and Goal Net. This study provides a solid basis for classifying existing and future approaches in the application of GORE. Researchers and practitioners can use this mapping to identify existing technical/research gaps to better address and assess their own contributions or understand existing ones.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44299772","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}
Pub Date : 2022-12-19DOI: 10.17533/udea.redin.20221209
Fatima Zohra Baba Hamed, F. Rahal, Farida Guenanou
The recent devastating earthquakes have revealed that bridges are one of the most vulnerable components of transportation systems. These seismic events highlighted the need to mitigate the risk resulting from the failure of bridges. This study aims to consider the seismic risk of an extensive heritage of existing civil engineering structures proceeding with prioritization. This imposes the need to consider the design of a geographic information system (GIS) based on the analysis of the different components of risk: hazard, vulnerability, and risk. The assessment of the seismic vulnerability of bridges integrates the various structural and non-structural components of bridges, taking into account their specificities in Algeria. The application of this approach to the Oran region has resulted in the development of a tool using a database to process as much geolocated information as possible, thus contributing to more efficient crisis management, and making it possible to avoid bridge damage and failures that can result in loss of life and monetary losses. This tool could also be used for the inspection of bridges as well as the optimal prioritization of preventive and corrective measures necessary before a major earthquake hits the bridge network in the Oran Region.
{"title":"Seismic vulnerability assessment of bridges. The case of the Oran region, Algeria","authors":"Fatima Zohra Baba Hamed, F. Rahal, Farida Guenanou","doi":"10.17533/udea.redin.20221209","DOIUrl":"https://doi.org/10.17533/udea.redin.20221209","url":null,"abstract":"The recent devastating earthquakes have revealed that bridges are one of the most vulnerable components of transportation systems. These seismic events highlighted the need to mitigate the risk resulting from the failure of bridges. This study aims to consider the seismic risk of an extensive heritage of existing civil engineering structures proceeding with prioritization. This imposes the need to consider the design of a geographic information system (GIS) based on the analysis of the different components of risk: hazard, vulnerability, and risk. The assessment of the seismic vulnerability of bridges integrates the various structural and non-structural components of bridges, taking into account their specificities in Algeria. The application of this approach to the Oran region has resulted in the development of a tool using a database to process as much geolocated information as possible, thus contributing to more efficient crisis management, and making it possible to avoid bridge damage and failures that can result in loss of life and monetary losses. This tool could also be used for the inspection of bridges as well as the optimal prioritization of preventive and corrective measures necessary before a major earthquake hits the bridge network in the Oran Region.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90758727","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}
Pub Date : 2022-12-02DOI: 10.17533/udea.redin.20221208
Ana Isabel Montilla-López, Laura Isabel Velásquez-García, J. Betancour, A. Rubio-Clemente, Edwin Chica-Arrieta
The performance of an Archimedes spiral turbine (AST) for hydrokinetic applications was examined using a three-dimensional unsteady numerical model utilizing the six degrees of freedom (6-DOF) solver that is available in ANSYs Fluent software. From the computational fluid dynamics (CFD) simulations, the power coefficient (Cp) curve was estimated. This curve was compared with the curve of an Archimedes screw hydrokinetic turbine (ASHT) reported in the literature. The ASHT was found to be more efficient than the AST for electricity generation. The highest value of Cp for the AST was 0.337, which is a relatively high value in comparison with that of other types of hydrokinetic turbines. The results calculated from the CFD for the AST were compared with an experimental study reported for wind applications.
{"title":"Performance of an Archimedes screw turbine with spiral configuration for hydrokinetic applications","authors":"Ana Isabel Montilla-López, Laura Isabel Velásquez-García, J. Betancour, A. Rubio-Clemente, Edwin Chica-Arrieta","doi":"10.17533/udea.redin.20221208","DOIUrl":"https://doi.org/10.17533/udea.redin.20221208","url":null,"abstract":"The performance of an Archimedes spiral turbine (AST) for hydrokinetic applications was examined using a three-dimensional unsteady numerical model utilizing the six degrees of freedom (6-DOF) solver that is available in ANSYs Fluent software. From the computational fluid dynamics (CFD) simulations, the power coefficient (Cp) curve was estimated. This curve was compared with the curve of an Archimedes screw hydrokinetic turbine (ASHT) reported in the literature. The ASHT was found to be more efficient than the AST for electricity generation. The highest value of Cp for the AST was 0.337, which is a relatively high value in comparison with that of other types of hydrokinetic turbines. The results calculated from the CFD for the AST were compared with an experimental study reported for wind applications.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2022-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77415355","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}
Pub Date : 2022-11-28DOI: 10.17533/udea.redin.20221107
A. Yudianto, M. Solikin, Sutiman Sutiman, Z. Arifin, I. Adiyasa, A. Yudantoko
A vehicle is more stable when the geometric center, center of gravity, and stagnation point are in line. However, the inflow direction and velocity magnitude of the operational environment of road vehicles are varying. This study aims to investigate the aerodynamic behavior of a water-drop-shaped vehicle under side wind conditions. Some essential aerodynamic performances of the vehicle are numerically and graphically analyzed at 0 deg, 10 deg, and 20 deg of side wind directions. The value of the coefficient of drag, drag force, coefficient of lift, and lift force exponentially increases as the yaw angle elevates. The lower part on the area of the front-wheel compartment becomes the critical location indicated by the results on pressure coefficient, friction coefficient, and total wall shear stress distribution along the vehicle surface. Increasing the side wind angle triggers more significant vortex regions generated around the wheel compartment and on the leeward side of the vehicle.
{"title":"Aerodynamic investigation of extremely efficient vehicles under side wind conditions","authors":"A. Yudianto, M. Solikin, Sutiman Sutiman, Z. Arifin, I. Adiyasa, A. Yudantoko","doi":"10.17533/udea.redin.20221107","DOIUrl":"https://doi.org/10.17533/udea.redin.20221107","url":null,"abstract":"A vehicle is more stable when the geometric center, center of gravity, and stagnation point are in line. However, the inflow direction and velocity magnitude of the operational environment of road vehicles are varying. This study aims to investigate the aerodynamic behavior of a water-drop-shaped vehicle under side wind conditions. Some essential aerodynamic performances of the vehicle are numerically and graphically analyzed at 0 deg, 10 deg, and 20 deg of side wind directions. The value of the coefficient of drag, drag force, coefficient of lift, and lift force exponentially increases as the yaw angle elevates. The lower part on the area of the front-wheel compartment becomes the critical location indicated by the results on pressure coefficient, friction coefficient, and total wall shear stress distribution along the vehicle surface. Increasing the side wind angle triggers more significant vortex regions generated around the wheel compartment and on the leeward side of the vehicle.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81396640","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}
Pub Date : 2022-11-28DOI: 10.17533/udea.redin.20221106
S. Meneses-Múnera, J. A. Carlos-Cornelio, A. Cadavid-Sierra, Juan Sebastián Rudas-Flórez, M. I. Ardila-Marín, A. Toro, L. Hoyos-Palacio
In this research, a diesel engine lubricant, modified with Multi-Walled Carbon Nanotubes (MWCNTs) was evaluated. Carboxylic group functionalized MWCNTs were dispersed in 15W40 mineral oil for Diesel engines and retaining ring and cylinder sleeve materials from F300 diesel engine were used for tribological tests. The Nanofluid (0.1 0.5 and 1% wt.) rheological behavior was characterized. Nanolubricants with 1% wt and base oil were evaluated on a Pin-on-Disk test. Results suggest both wear rate and coefficient of friction reduction when MWCNTs are used, while no significant rheological properties changes were observed.
{"title":"Effect of addition of MWCNTs to a mineral lubricant on Diesel engine performance","authors":"S. Meneses-Múnera, J. A. Carlos-Cornelio, A. Cadavid-Sierra, Juan Sebastián Rudas-Flórez, M. I. Ardila-Marín, A. Toro, L. Hoyos-Palacio","doi":"10.17533/udea.redin.20221106","DOIUrl":"https://doi.org/10.17533/udea.redin.20221106","url":null,"abstract":" In this research, a diesel engine lubricant, modified with Multi-Walled Carbon Nanotubes (MWCNTs) was evaluated. Carboxylic group functionalized MWCNTs were dispersed in 15W40 mineral oil for Diesel engines and retaining ring and cylinder sleeve materials from F300 diesel engine were used for tribological tests. The Nanofluid (0.1 0.5 and 1% wt.) rheological behavior was characterized. Nanolubricants with 1% wt and base oil were evaluated on a Pin-on-Disk test. Results suggest both wear rate and coefficient of friction reduction when MWCNTs are used, while no significant rheological properties changes were observed.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86764750","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}
Pub Date : 2022-11-27DOI: 10.19053/01211129.v31.n62.2022.14870
Natalia Arteaga-López, Carlos Delgado-Calvache, Juan-Fernando Casanova, Cristian Figeroa
The use of Unmanned Aerial Vehicles (UAVs) equipped with spectral cameras has increased in recent years, especially in the agricultural sector, because it allows farmers and researchers to analyze the state of a crop, i.e., health, nutrients, growth, epidemics, among other parameters. In Colombia, the coffee production sector faces several challenges, such as the need to increase the productivity, the yield, and the quality of coffee. This work estimated the health status of a Castilla variety crop located in San Joaquín, Tambo, Cauca to support the decision-making of coffee growers. For this, chlorophyll data were measured in the field with the CCM-200 plus device, multispectral images were captured with the MAPIR SURVEY 3 camera airborne on a SOLO 3DR UAV, and synthetic data were generated to increase the data set. Six vegetation indices were set, which—together with the chlorophyll values—were modeled through the implementation of simple and multiple linear regressions, decision trees, vector machines, random forests, and k-nearest neighbors. The model with the best performance and the lowest mean square error was disorder with the support vector machine. Likewise, the best performance indices in the models were CVI, GNDVI, and GCI, which are widely used in agriculture to estimate the chlorophyll of plants.
{"title":"Coffee Crops Analysis Using UAVs Equipped with Multispectral Cameras","authors":"Natalia Arteaga-López, Carlos Delgado-Calvache, Juan-Fernando Casanova, Cristian Figeroa","doi":"10.19053/01211129.v31.n62.2022.14870","DOIUrl":"https://doi.org/10.19053/01211129.v31.n62.2022.14870","url":null,"abstract":"The use of Unmanned Aerial Vehicles (UAVs) equipped with spectral cameras has increased in recent years, especially in the agricultural sector, because it allows farmers and researchers to analyze the state of a crop, i.e., health, nutrients, growth, epidemics, among other parameters. In Colombia, the coffee production sector faces several challenges, such as the need to increase the productivity, the yield, and the quality of coffee. This work estimated the health status of a Castilla variety crop located in San Joaquín, Tambo, Cauca to support the decision-making of coffee growers. For this, chlorophyll data were measured in the field with the CCM-200 plus device, multispectral images were captured with the MAPIR SURVEY 3 camera airborne on a SOLO 3DR UAV, and synthetic data were generated to increase the data set. Six vegetation indices were set, which—together with the chlorophyll values—were modeled through the implementation of simple and multiple linear regressions, decision trees, vector machines, random forests, and k-nearest neighbors. The model with the best performance and the lowest mean square error was disorder with the support vector machine. Likewise, the best performance indices in the models were CVI, GNDVI, and GCI, which are widely used in agriculture to estimate the chlorophyll of plants.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2022-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47789222","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}
Pub Date : 2022-11-25DOI: 10.17533/udea.redin.20221105
Vu Hanh, Nguyễn Thị Hồng Nga
The objective of this paper is to measure seven factors, including Labor, Capital & Scale, Physical Infrastructure, Information Technology Infrastructure, Institutions, Openness to the Economic Environment, and Emission. Furthermore, another objective is to assess which factors impact on Labor Productivity, Capital Productivity, and Gross Domestic Product (GDP) of the Transportation Logistics Industry in Ho Chi Minh. It will also assess how GDP is impacted by Labor Productivity and Capital Productivity. The Methodology used includes Cronbach’s Alpha, Exploratory Factor Analysis, Pearson Correlation and Multivariate regression. Highlight results are Transportation Logistics Industry’s Scale, such as total enterprises of Transportation Logistics Industry impacts on Labor Productivity at Sig. < .001 and Beta = 0.706, impacts on Capital Productivity at Sig. < .001 and Beta = 1.728, and impacts on Transportation Logistics Industry’s GDP at Sig. < .001 and Beta = 0.712, which impacts all in the positive direction. Besides, while Labor Productivity impacts in the same direction on GDP at Beta = 1.006 and Sig. < .001, Capital Productivity does not impact on GDP. Therefore, to develop Transportation Logistics Industry, there is a need to focus on Transportation Logistics Industry’s GDP by boosting its Labor Productivity. Also, there is a need to focus on the Transportation Logistics Industry’s Scale in the direction of increasing total enterprises is important and necessary.
{"title":"Study on Transportation Logistics Industry development under economics: The case of HCM, Vietnam","authors":"Vu Hanh, Nguyễn Thị Hồng Nga","doi":"10.17533/udea.redin.20221105","DOIUrl":"https://doi.org/10.17533/udea.redin.20221105","url":null,"abstract":"The objective of this paper is to measure seven factors, including Labor, Capital & Scale, Physical Infrastructure, Information Technology Infrastructure, Institutions, Openness to the Economic Environment, and Emission. Furthermore, another objective is to assess which factors impact on Labor Productivity, Capital Productivity, and Gross Domestic Product (GDP) of the Transportation Logistics Industry in Ho Chi Minh. It will also assess how GDP is impacted by Labor Productivity and Capital Productivity. The Methodology used includes Cronbach’s Alpha, Exploratory Factor Analysis, Pearson Correlation and Multivariate regression. Highlight results are Transportation Logistics Industry’s Scale, such as total enterprises of Transportation Logistics Industry impacts on Labor Productivity at Sig. < .001 and Beta = 0.706, impacts on Capital Productivity at Sig. < .001 and Beta = 1.728, and impacts on Transportation Logistics Industry’s GDP at Sig. < .001 and Beta = 0.712, which impacts all in the positive direction. Besides, while Labor Productivity impacts in the same direction on GDP at Beta = 1.006 and Sig. < .001, Capital Productivity does not impact on GDP. Therefore, to develop Transportation Logistics Industry, there is a need to focus on Transportation Logistics Industry’s GDP by boosting its Labor Productivity. Also, there is a need to focus on the Transportation Logistics Industry’s Scale in the direction of increasing total enterprises is important and necessary.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2022-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76984922","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}
Pub Date : 2022-11-23DOI: 10.17533/udea.redin.20221104
L. F. Prada-Sarmiento, A. Ramos-Cañón, J. Camacho-Tauta
Undrained instability is a failure mode that has been observed in many sandy slopes. However, the highly anisotropic stress states caused by the geometry of the slope have not been duly considered from the experimental point of view. This article studies the influence of the initial stress anisotropy of laboratory samples on the static undrained instability of the Colombian reference sand. Forty-five consolidated undrained triaxial tests were performed, prescribing combinations of different initial void ratios, mean confining pressure, and initial stress ratios. Experimental results allow concluding that: a. the size of the instability zone on the p′ − q plane becomes smaller for larger initial anisotropic stress ratios; b. a novel undrained instability plane can be proposed in the p′ − q − e space to set a boundary between stable and unstable undrained loading conditions; c. mean confining pressure plays a vital role in the estimation of undrained instability for Guamo sand samples under low and medium confining stresses; d. despite multiple factors that influence the onset of undrained instability, a relation can be derived between the undrained instability susceptibility of sandy slopes and the initial stress ratio η0.
{"title":"Effects of initial stress anisotropy on the onset of undrained instability for Guamo sand","authors":"L. F. Prada-Sarmiento, A. Ramos-Cañón, J. Camacho-Tauta","doi":"10.17533/udea.redin.20221104","DOIUrl":"https://doi.org/10.17533/udea.redin.20221104","url":null,"abstract":"Undrained instability is a failure mode that has been observed in many sandy slopes. However, the highly anisotropic stress states caused by the geometry of the slope have not been duly considered from the experimental point of view. This article studies the influence of the initial stress anisotropy of laboratory samples on the static undrained instability of the Colombian reference sand. Forty-five consolidated undrained triaxial tests were performed, prescribing combinations of different initial void ratios, mean confining pressure, and initial stress ratios. Experimental results allow concluding that: a. the size of the instability zone on the p′ − q plane becomes smaller for larger initial anisotropic stress ratios; b. a novel undrained instability plane can be proposed in the p′ − q − e space to set a boundary between stable and unstable undrained loading conditions; c. mean confining pressure plays a vital role in the estimation of undrained instability for Guamo sand samples under low and medium confining stresses; d. despite multiple factors that influence the onset of undrained instability, a relation can be derived between the undrained instability susceptibility of sandy slopes and the initial stress ratio η0.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87391112","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}
Pub Date : 2022-11-21DOI: 10.17533/udea.redin.20221103
Mateo Duarte-García, I. D. Patiño-Arcila, C. A. Isaza-Merino
Some of the most important industries, such as aerospace, automotive, among others, have stipulated new requirements for materials behavior that include high specific, mechanical, and thermal properties. According to this, nanocomposites have emerged to satisfy these requirements. However, manufacturing these nanocomposites implies cost and time-consuming problems that do not allow their use in technological applications; additionally, the lack of knowledge about the prediction of their mechanical properties is an obstacle to its technological implementation. Therefore, several studies have focused on the development of computational models to predict the mechanical behavior of nano-reinforced composites. In the present work, a comparative assessment of the main computational models for predicting the tensile strength of nanocomposites is carried out. Firstly, a new taxonomy of these models is proposed, which allows identifying the main experimental variables, model evolution, and precision. With the categorization, computational algorithms are developed for these models for predicting the tensile strength of nanocomposites, accomplishing a comparative analysis of accuracy, robustness, and time-cost among them. The precision of these models is evaluated by deeming benchmark experimental works focused on the tensile strength of nanocomposites. The results obtained demonstrated a minimum relative error of 44.7%, 10.1%, and 10.6% for First-Generation, Second-Generation, and Third-Generation models, respectively. Moreover, linear and non-linear behaviors were found in the evaluated models, being coherent with the number and kind of parameters required for the assessment.
{"title":"Comparative assessment of computational models for the effective tensile strength of nano-reinforced composites","authors":"Mateo Duarte-García, I. D. Patiño-Arcila, C. A. Isaza-Merino","doi":"10.17533/udea.redin.20221103","DOIUrl":"https://doi.org/10.17533/udea.redin.20221103","url":null,"abstract":"Some of the most important industries, such as aerospace, automotive, among others, have stipulated new requirements for materials behavior that include high specific, mechanical, and thermal properties. According to this, nanocomposites have emerged to satisfy these requirements. However, manufacturing these nanocomposites implies cost and time-consuming problems that do not allow their use in technological applications; additionally, the lack of knowledge about the prediction of their mechanical properties is an obstacle to its technological implementation. Therefore, several studies have focused on the development of computational models to predict the mechanical behavior of nano-reinforced composites. In the present work, a comparative assessment of the main computational models for predicting the tensile strength of nanocomposites is carried out. Firstly, a new taxonomy of these models is proposed, which allows identifying the main experimental variables, model evolution, and precision. With the categorization, computational algorithms are developed for these models for predicting the tensile strength of nanocomposites, accomplishing a comparative analysis of accuracy, robustness, and time-cost among them. The precision of these models is evaluated by deeming benchmark experimental works focused on the tensile strength of nanocomposites. The results obtained demonstrated a minimum relative error of 44.7%, 10.1%, and 10.6% for First-Generation, Second-Generation, and Third-Generation models, respectively. Moreover, linear and non-linear behaviors were found in the evaluated models, being coherent with the number and kind of parameters required for the assessment.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78384029","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}
Pub Date : 2022-11-16DOI: 10.17533/udea.redin.20221102
Heidy Lorena Gallego-Ocampo, Karen Johana Ortega-Villalba, Carlos Vélez-Pasos, Ronald Rojas-Alvarado
The cross-flow microfiltration (CFM) of fruit juices allows obtaining products of high quality by conserving their organoleptic characteristics and microbiological stability during storage. The effect of the main macro-compounds and the transmembrane pressure (TMP) on the process performance with model fluids was evaluated. The model fluids concentration varied between 0.25 and 0.75% for pectin and 0.04 and 0.08% for cellulose. To study the influence of transmembrane pressure (TMP) and concentration on the hydrodynamic properties of the fouling layer ( , diffusivity (D) and the boundary layer thickness ) the Box-Behnken design with three replicas in the center was used. It was found that the CFM process is efficient and commercially feasible when working at a constant TMP of 1.93 bar and at concentrations of pectin and cellulose of 0.25% and 0.0513%, respectively.
{"title":"Influence of the pectin and cellulose on the performance of cross-flow microfiltration","authors":"Heidy Lorena Gallego-Ocampo, Karen Johana Ortega-Villalba, Carlos Vélez-Pasos, Ronald Rojas-Alvarado","doi":"10.17533/udea.redin.20221102","DOIUrl":"https://doi.org/10.17533/udea.redin.20221102","url":null,"abstract":"The cross-flow microfiltration (CFM) of fruit juices allows obtaining products of high quality by conserving their organoleptic characteristics and microbiological stability during storage. The effect of the main macro-compounds and the transmembrane pressure (TMP) on the process performance with model fluids was evaluated. The model fluids concentration varied between 0.25 and 0.75% for pectin and 0.04 and 0.08% for cellulose. To study the influence of transmembrane pressure (TMP) and concentration on the hydrodynamic properties of the fouling layer ( , diffusivity (D) and the boundary layer thickness ) the Box-Behnken design with three replicas in the center was used. It was found that the CFM process is efficient and commercially feasible when working at a constant TMP of 1.93 bar and at concentrations of pectin and cellulose of 0.25% and 0.0513%, respectively.","PeriodicalId":42846,"journal":{"name":"Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2022-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91205112","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}
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