Pub Date : 2020-01-01DOI: 10.15446/ING.INVESTIG.V40N1.80002
Grover Romer Llanque Ayala, Francisco Chagas da Silva Filho, Rosiel Ferreira Leme, M. C. Cavalcanti, C. Mahler
El presente trabajo pretende demostrar las ventajas de considerar el regimen de flujo transitorio en el analisis de estabilidad de talud aguas arriba para la situacion de reduccion rapida de una presa de tierra homogenea. Se llevaron a cabo analisis de estabilidad de taludes aguas arriba, considerando la presion de poro / succion para analisis de flujo transitorio que simula la reduccion rapida del embalse. Los analisis comprendieron diferentes geometrias del talud aguas arriba (de 1V: 1.1H a 1V: 2.5H), alturas que varian de 10 m a 50 m, asi como varios materiales de baja permeabilidad (SM, SM-SC, SC, ML, ML-CL, CL, MH y CH). Ademas, las ecuaciones que relacionan el factor de seguridad con dichos taludes o la altura de la presa se ajustaron a los datos de analisis, para definir el talud minimo para una determinada altura de la presa o la altura maxima para un determinado talud aguas arriba. Los resultados han demostrado que: teniendo en cuenta la condicion de flujo transitorio, incluida la succion, en el analisis de estabilidad de taludes de la situacion de reduccion rapida, aumenta el factor de seguridad en relacion con el analisis simplificado que generalmente se adopta. Esto tambien ha resultado en taludes mucho mas pronunciados, para un factor de seguridad de 1.1, que los recomendados por la Oficina de Reclamacion de los E.E.U.U. (USBR), sugiriendo la importancia de realizar analisis de flujo transitorio para las situaciones de reduccion rapida y considerando sus resultados en el analisis de estabilidad.
{"title":"Rapid Drawdown in Homogeneous Earth Dam Considering Transient Flow and Suction","authors":"Grover Romer Llanque Ayala, Francisco Chagas da Silva Filho, Rosiel Ferreira Leme, M. C. Cavalcanti, C. Mahler","doi":"10.15446/ING.INVESTIG.V40N1.80002","DOIUrl":"https://doi.org/10.15446/ING.INVESTIG.V40N1.80002","url":null,"abstract":"El presente trabajo pretende demostrar las ventajas de considerar el regimen de flujo transitorio en el analisis de estabilidad de talud aguas arriba para la situacion de reduccion rapida de una presa de tierra homogenea. Se llevaron a cabo analisis de estabilidad de taludes aguas arriba, considerando la presion de poro / succion para analisis de flujo transitorio que simula la reduccion rapida del embalse. Los analisis comprendieron diferentes geometrias del talud aguas arriba (de 1V: 1.1H a 1V: 2.5H), alturas que varian de 10 m a 50 m, asi como varios materiales de baja permeabilidad (SM, SM-SC, SC, ML, ML-CL, CL, MH y CH). Ademas, las ecuaciones que relacionan el factor de seguridad con dichos taludes o la altura de la presa se ajustaron a los datos de analisis, para definir el talud minimo para una determinada altura de la presa o la altura maxima para un determinado talud aguas arriba. Los resultados han demostrado que: teniendo en cuenta la condicion de flujo transitorio, incluida la succion, en el analisis de estabilidad de taludes de la situacion de reduccion rapida, aumenta el factor de seguridad en relacion con el analisis simplificado que generalmente se adopta. Esto tambien ha resultado en taludes mucho mas pronunciados, para un factor de seguridad de 1.1, que los recomendados por la Oficina de Reclamacion de los E.E.U.U. (USBR), sugiriendo la importancia de realizar analisis de flujo transitorio para las situaciones de reduccion rapida y considerando sus resultados en el analisis de estabilidad.","PeriodicalId":21285,"journal":{"name":"Revista Ingenieria E Investigacion","volume":"332 1","pages":"17-26"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79727475","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 : 2019-07-03DOI: 10.15446/ING.INVESTIG.V38N1.66425
J. Ramírez, J. Huertas
In the chemical industry, it is common to find production systems characterized by having a single stage or a previously identified bottleneck stage, with multiple non-identical parallel stations and with setup costs that depend on the production sequence. This paper proposes a mixed integer production-scheduling model that identifies lot size and product sequence that maximize profit. It considers multiple typical industry conditions, such as penalties for noncompliance or out of service periods of the productive units (or stations) for preventive maintenance activities. The model was validated with real data from an oil chemical company. Aiming to analyze its performance, we applied the model to 155 instances of production, which were obtained using Monte Carlo technique on the historical production data of the same company. We obtained an average 12 % reduction in the total cost of production and a 19 % increase in the estimated profit.
{"title":"A continuous time model for a short-term multiproduct batch process scheduling","authors":"J. Ramírez, J. Huertas","doi":"10.15446/ING.INVESTIG.V38N1.66425","DOIUrl":"https://doi.org/10.15446/ING.INVESTIG.V38N1.66425","url":null,"abstract":"In the chemical industry, it is common to find production systems characterized by having a single stage or a previously identified bottleneck stage, with multiple non-identical parallel stations and with setup costs that depend on the production sequence. This paper proposes a mixed integer production-scheduling model that identifies lot size and product sequence that maximize profit. It considers multiple typical industry conditions, such as penalties for noncompliance or out of service periods of the productive units (or stations) for preventive maintenance activities. The model was validated with real data from an oil chemical company. Aiming to analyze its performance, we applied the model to 155 instances of production, which were obtained using Monte Carlo technique on the historical production data of the same company. We obtained an average 12 % reduction in the total cost of production and a 19 % increase in the estimated profit.","PeriodicalId":21285,"journal":{"name":"Revista Ingenieria E Investigacion","volume":"2016 1","pages":"96-104"},"PeriodicalIF":0.0,"publicationDate":"2019-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82791649","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 : 2018-05-01DOI: 10.15446/ING.INVESTIG.V38N2.65202
Arturo Realyvásquez, A. Maldonado-Macías, J. García-Alcaráz
One of the main challenges in Macroergonomics is to develop a universal model to measure macroergonomic compatibility. As a first step to develop such model, it is necessary to validate the construct of macroergonomic compatibility (MC). MC refers to the ability of the different work system components and elements to complement the capabilities and limitations of employees in order to achieve companies’ goals. In that regard, to achieve this step, this paper analyzes the effects of MC of physical and psychological characteristics of employees over the performance of manufacturing systems measured by the clients , production processes , and the organizational performance of companies . Data was obtained from 188 employees of manufacturing systems by means of the Macroergonomic Compatibility Questionnaire (MCQ) in Chihuahua, Mexico. Also, data is analyzed to propose and test a hypothetical causal model of the relationships among the variables by using a Structural Equation Modeling (SEM) approach. Employees’ physical characteristics ( weight , height , strength ) are considered as independent variable. The highest direct effects values (s) were found from physical characteristics to psychological characteristics (0,49), from clients to organizational performance (0,45), and from psychological characteristics to motivation and needs . Also, the highest total effects were found from physical characteristics to motivation and needs (0,517) and psychological characteristics (0,488) and from clients to organizational performance (0,454). Results of this model offer relevant knowledge to develop macroergonomic strategies for manufacturing systems in order to increase their competitiveness and support the design and improvement of these systems.
{"title":"Effects of employees’ physical and psychological characteristics over manufacturing systems’ performance","authors":"Arturo Realyvásquez, A. Maldonado-Macías, J. García-Alcaráz","doi":"10.15446/ING.INVESTIG.V38N2.65202","DOIUrl":"https://doi.org/10.15446/ING.INVESTIG.V38N2.65202","url":null,"abstract":"One of the main challenges in Macroergonomics is to develop a universal model to measure macroergonomic compatibility. As a first step to develop such model, it is necessary to validate the construct of macroergonomic compatibility (MC). MC refers to the ability of the different work system components and elements to complement the capabilities and limitations of employees in order to achieve companies’ goals. In that regard, to achieve this step, this paper analyzes the effects of MC of physical and psychological characteristics of employees over the performance of manufacturing systems measured by the clients , production processes , and the organizational performance of companies . Data was obtained from 188 employees of manufacturing systems by means of the Macroergonomic Compatibility Questionnaire (MCQ) in Chihuahua, Mexico. Also, data is analyzed to propose and test a hypothetical causal model of the relationships among the variables by using a Structural Equation Modeling (SEM) approach. Employees’ physical characteristics ( weight , height , strength ) are considered as independent variable. The highest direct effects values (s) were found from physical characteristics to psychological characteristics (0,49), from clients to organizational performance (0,45), and from psychological characteristics to motivation and needs . Also, the highest total effects were found from physical characteristics to motivation and needs (0,517) and psychological characteristics (0,488) and from clients to organizational performance (0,454). Results of this model offer relevant knowledge to develop macroergonomic strategies for manufacturing systems in order to increase their competitiveness and support the design and improvement of these systems.","PeriodicalId":21285,"journal":{"name":"Revista Ingenieria E Investigacion","volume":"73 1","pages":"79-89"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84343877","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 : 2018-05-01DOI: 10.15446/ING.INVESTIG.V38N2.67743
A. Arrieta, E. O. Muñoz, Ismael Piñeres Ariza, Andrés Escobar, M. Chamorro
Using simultaneous thermogravimetrical analysis coupled with mass spectroscopy, the pyrolysis of African palm husk, using several heat rates and programs was performed. Seven relations of mass/charge were followed of the evolved gas of the pyrolysis process, fitting the kinetics and the mass spectroscopy signals to the distributed activation energy model (DAEM) with different numbers of pseudo-components. Fitting with four pseudo-components proved to be the best for modeling the thermal degradation process. Kinetic parameters were not affected by the heating rate or program employed, which agrees with other reports for similar biomass. Methane, methanol formaldehyde, furfural were successfully fitted to the DAEM model, nevertheless CO2 and NO2 were not able to be represented by this model due to its production in secondary reactions in gaseous phase.
{"title":"Devolatilization of African Palm (Elaeis guineensis) Husk studied by TG-MS","authors":"A. Arrieta, E. O. Muñoz, Ismael Piñeres Ariza, Andrés Escobar, M. Chamorro","doi":"10.15446/ING.INVESTIG.V38N2.67743","DOIUrl":"https://doi.org/10.15446/ING.INVESTIG.V38N2.67743","url":null,"abstract":"Using simultaneous thermogravimetrical analysis coupled with mass spectroscopy, the pyrolysis of African palm husk, using several heat rates and programs was performed. Seven relations of mass/charge were followed of the evolved gas of the pyrolysis process, fitting the kinetics and the mass spectroscopy signals to the distributed activation energy model (DAEM) with different numbers of pseudo-components. Fitting with four pseudo-components proved to be the best for modeling the thermal degradation process. Kinetic parameters were not affected by the heating rate or program employed, which agrees with other reports for similar biomass. Methane, methanol formaldehyde, furfural were successfully fitted to the DAEM model, nevertheless CO2 and NO2 were not able to be represented by this model due to its production in secondary reactions in gaseous phase.","PeriodicalId":21285,"journal":{"name":"Revista Ingenieria E Investigacion","volume":"10 1","pages":"9-17"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90751187","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 : 2018-05-01DOI: 10.15446/ING.INVESTIG.V38N2.68407
L. H. O. Gutierrez, L. F. N. Vasquez, C. Jiménez
The purpose of this research is to apply a new approach to make a fast determination of earthquake depth using seismic records of the “El Rosal” station, near to the city of Bogota – Colombia, by applying support vector machine regression (SVMR). The algorithm was trained with descriptors obtained from time signals of 863 seismic events acquired between January 1998 and October 2008; only earthquakes with magnitude ≥ 2 were contemplated, filtering its signals to remove diverse kind of noises not related to earth tremors. During training stages of SVMR several combinations of kernel function exponent and complexity factor were considered for time signals of 5, 10 and 15 seconds along with earthquake magnitudes of 2.0, 2.5, 3.0 and 3.5 (Ml). The best classification of SVMR was obtained using time signals of 15 seconds and earthquake magnitudes of 3.5 with kernel exponent of 10 and complexity factor of 2, showing accuracy of 0.6 ± 16.5 kilometers, which is good enough to be used in an early warning system for the city of Bogota. It is recommended to provide this model with a previous phase of deep-shallow classification.
{"title":"Fast Determination of Earthquake Depth Using Seismic Records of a Single Station, Implementing Machine Learning Techniques","authors":"L. H. O. Gutierrez, L. F. N. Vasquez, C. Jiménez","doi":"10.15446/ING.INVESTIG.V38N2.68407","DOIUrl":"https://doi.org/10.15446/ING.INVESTIG.V38N2.68407","url":null,"abstract":"The purpose of this research is to apply a new approach to make a fast determination of earthquake depth using seismic records of the “El Rosal” station, near to the city of Bogota – Colombia, by applying support vector machine regression (SVMR). The algorithm was trained with descriptors obtained from time signals of 863 seismic events acquired between January 1998 and October 2008; only earthquakes with magnitude ≥ 2 were contemplated, filtering its signals to remove diverse kind of noises not related to earth tremors. During training stages of SVMR several combinations of kernel function exponent and complexity factor were considered for time signals of 5, 10 and 15 seconds along with earthquake magnitudes of 2.0, 2.5, 3.0 and 3.5 (Ml). The best classification of SVMR was obtained using time signals of 15 seconds and earthquake magnitudes of 3.5 with kernel exponent of 10 and complexity factor of 2, showing accuracy of 0.6 ± 16.5 kilometers, which is good enough to be used in an early warning system for the city of Bogota. It is recommended to provide this model with a previous phase of deep-shallow classification.","PeriodicalId":21285,"journal":{"name":"Revista Ingenieria E Investigacion","volume":"6 1","pages":"97-103"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77980614","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 : 2018-05-01DOI: 10.15446/ING.INVESTIG.V38N2.68638
Miguel Gerardo Delgado Jojoa, H. R. Quintana, Jessica Alexandra Sánchez Gilede, W. Gómez, F. R. Lizcano
This article shows the evaluation of the influence of two polymer wastes (crumb rubber – GCR and low density polyethylene – LDPE), a natural bitumen (Gilsonite - G) and a chemical component (Husil) about the physical, rheological and thermal properties of an asphalt cement (AC 60/70 penetration grade). Over a control asphalt and the modified asphalts were performed: penetration, softening point, ductility, ignition point, rheology (using a dynamic cut rheometer – DSR), Multi Stress Creep and Recovery (MSCR), linear amplitude sweep (LAS), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) tests. The results show that fourth additives increase the stiffness and rutting resistance of the asphalts. Additionally, it reports an increase in fatigue cracking resistance when asphalt cement is modified with GCR, G and Husil. The additives give thermal stability to the asphalt cement, providing less mass loss (linked mostly to a less oxidation).
{"title":"Influence of four non-conventional additives on the physical, rheological and thermal properties of an asphalt","authors":"Miguel Gerardo Delgado Jojoa, H. R. Quintana, Jessica Alexandra Sánchez Gilede, W. Gómez, F. R. Lizcano","doi":"10.15446/ING.INVESTIG.V38N2.68638","DOIUrl":"https://doi.org/10.15446/ING.INVESTIG.V38N2.68638","url":null,"abstract":"This article shows the evaluation of the influence of two polymer wastes (crumb rubber – GCR and low density polyethylene – LDPE), a natural bitumen (Gilsonite - G) and a chemical component (Husil) about the physical, rheological and thermal properties of an asphalt cement (AC 60/70 penetration grade). Over a control asphalt and the modified asphalts were performed: penetration, softening point, ductility, ignition point, rheology (using a dynamic cut rheometer – DSR), Multi Stress Creep and Recovery (MSCR), linear amplitude sweep (LAS), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) tests. The results show that fourth additives increase the stiffness and rutting resistance of the asphalts. Additionally, it reports an increase in fatigue cracking resistance when asphalt cement is modified with GCR, G and Husil. The additives give thermal stability to the asphalt cement, providing less mass loss (linked mostly to a less oxidation).","PeriodicalId":21285,"journal":{"name":"Revista Ingenieria E Investigacion","volume":"76 1","pages":"18-26"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73843428","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 : 2018-05-01DOI: 10.15446/ING.INVESTIG.V38N2.70550
J. Hoyo-Montaño, Jesús Naim Leon-Ortega, G. Valencia‐Palomo, Rafael Armando Galaz-Bustamante, D. Espejel-Blanco, Martín Gustavo Vázquez Palma
This paper shows the development of a decision tree for the classification of loads in a non-intrusive load monitoring (NILM) system implemented in a simple board computer (Raspberry Pi 3). The decision tree uses the total energy value of the power signal of an equipment, which is generated using a discrete wavelet transform and Parseval’s theorem. The power consumption data of different types of equipment were obtained from a public access database for NILM applications. The best split point for the design of the decision tree was determined using the weighted average Gini index. The tree was validated using loads available in the same public access database.
本文展示了一种用于在简单板计算机(Raspberry Pi 3)上实现的非侵入式负载监测(NILM)系统中进行负载分类的决策树的开发。决策树使用设备电源信号的总能量值，该能量值使用离散小波变换和Parseval定理生成。不同类型设备的功耗数据从NILM应用的公共访问数据库中获取。利用加权平均基尼系数确定决策树设计的最佳分歧点。该树使用同一公共访问数据库中可用的负载进行验证。
{"title":"Non-Intrusive Electric Load identification using Wavelet Transform","authors":"J. Hoyo-Montaño, Jesús Naim Leon-Ortega, G. Valencia‐Palomo, Rafael Armando Galaz-Bustamante, D. Espejel-Blanco, Martín Gustavo Vázquez Palma","doi":"10.15446/ING.INVESTIG.V38N2.70550","DOIUrl":"https://doi.org/10.15446/ING.INVESTIG.V38N2.70550","url":null,"abstract":"This paper shows the development of a decision tree for the classification of loads in a non-intrusive load monitoring (NILM) system implemented in a simple board computer (Raspberry Pi 3). The decision tree uses the total energy value of the power signal of an equipment, which is generated using a discrete wavelet transform and Parseval’s theorem. The power consumption data of different types of equipment were obtained from a public access database for NILM applications. The best split point for the design of the decision tree was determined using the weighted average Gini index. The tree was validated using loads available in the same public access database.","PeriodicalId":21285,"journal":{"name":"Revista Ingenieria E Investigacion","volume":"59 1","pages":"42-51"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84539121","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 : 2018-05-01DOI: 10.15446/ING.INVESTIG.V38N2.67331
Miguel Cantillo, R. González, J. J. Mares, C. Monroy
The identification of irregular users is an important assignment in the recovery of energy in the distribution sector. This analysis requires low error levels to minimize non-technical electrical losses in power grid. However, the detection of fraudulent users who have billing does not present a generalized methodology. This issue is complex and varies according to the case study. This paper presents a novel methodology to identify residential fraudulent users by using intelligent systems. The proposed intelligent system consists of three fundamental modules. The first module performs the classification of users with similar power consumption curves using self-organizing maps and genetic algorithms. The second module allows carrying out the monthly electricity demand forecasting through of recursive adjustment of ARIMA models. The third module performs the detection of fraudulent users through an artificial neural network for pattern recognition. For the design and validation of the proposed intelligent system, several tests were performed in each developed module. The database used for the design and evaluation of the modules was constructed with data supplied by the energy distribution company of the Colombian Caribbean Region. The results obtained by the proposed intelligent system show a better performance versus the detection rates obtained by the company.
{"title":"Intelligent system for non-technical losses management in residential users of the electricity sector","authors":"Miguel Cantillo, R. González, J. J. Mares, C. Monroy","doi":"10.15446/ING.INVESTIG.V38N2.67331","DOIUrl":"https://doi.org/10.15446/ING.INVESTIG.V38N2.67331","url":null,"abstract":"The identification of irregular users is an important assignment in the recovery of energy in the distribution sector. This analysis requires low error levels to minimize non-technical electrical losses in power grid. However, the detection of fraudulent users who have billing does not present a generalized methodology. This issue is complex and varies according to the case study. This paper presents a novel methodology to identify residential fraudulent users by using intelligent systems. The proposed intelligent system consists of three fundamental modules. The first module performs the classification of users with similar power consumption curves using self-organizing maps and genetic algorithms. The second module allows carrying out the monthly electricity demand forecasting through of recursive adjustment of ARIMA models. The third module performs the detection of fraudulent users through an artificial neural network for pattern recognition. For the design and validation of the proposed intelligent system, several tests were performed in each developed module. The database used for the design and evaluation of the modules was constructed with data supplied by the energy distribution company of the Colombian Caribbean Region. The results obtained by the proposed intelligent system show a better performance versus the detection rates obtained by the company.","PeriodicalId":21285,"journal":{"name":"Revista Ingenieria E Investigacion","volume":"31 1","pages":"52-60"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88575267","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 : 2018-05-01DOI: 10.15446/ING.INVESTIG.V38N2.64509
Maricela Jiménez Rodríguez, Carlos Eduardo Padilla Leyferman, Juan Carlos Estrada Gutiérrez, María Guadalupe González Novoa, Horacio Gómez Rodríguez, Octavio Flores Siordia
In this work, steganography is implemented in photographs captured by an unmanned aerial vehicle (drone), with the purpose of adding an identifier that indicates which device they are taken from so it works for the recovery of the origin. In the system, a new technique that modifies the least significant bit (LSB) is applied, using a mathematical model to generate the chaotic orbits, one of the parts selects the RGB channel (Red, Green or Blue) where the LSB is changed and the other is implemented to calculate the random position of the sub pixel to be modified in the selected channel. In addition, a comparison between the bit to be hidden and the LSB of the pixel of the image is performed to verify if it is not necessary to modify it, which lessens the alterations in the container image. It is a tool to capture photos remotely with the Ar.Drone 2.0, with the features needed to perform an analysis that uses correlation diagrams and histograms to verify if the integrity of the message is guaranteed or if changes in the stego-image are visible to the naked eye. On the other hand, a test was done on the Baboon image to compare the robustness of the proposed system with other investigations, evaluating the correlation, contrast, energy, homogeneity, MSE, PSNR and quality index. The results generated were compared with the work of other authors concluding our system provides greater security, integrity, high sensitivity to the keys, it is not linked to a single chaotic system and can be applied to hide imperceptibly all kinds of information, in: radiographs, videos, files, official documents, and other types of containers.
{"title":"Steganography applied in the origin claim of pictures captured by drones based on chaos","authors":"Maricela Jiménez Rodríguez, Carlos Eduardo Padilla Leyferman, Juan Carlos Estrada Gutiérrez, María Guadalupe González Novoa, Horacio Gómez Rodríguez, Octavio Flores Siordia","doi":"10.15446/ING.INVESTIG.V38N2.64509","DOIUrl":"https://doi.org/10.15446/ING.INVESTIG.V38N2.64509","url":null,"abstract":"In this work, steganography is implemented in photographs captured by an unmanned aerial vehicle (drone), with the purpose of adding an identifier that indicates which device they are taken from so it works for the recovery of the origin. In the system, a new technique that modifies the least significant bit (LSB) is applied, using a mathematical model to generate the chaotic orbits, one of the parts selects the RGB channel (Red, Green or Blue) where the LSB is changed and the other is implemented to calculate the random position of the sub pixel to be modified in the selected channel. In addition, a comparison between the bit to be hidden and the LSB of the pixel of the image is performed to verify if it is not necessary to modify it, which lessens the alterations in the container image. It is a tool to capture photos remotely with the Ar.Drone 2.0, with the features needed to perform an analysis that uses correlation diagrams and histograms to verify if the integrity of the message is guaranteed or if changes in the stego-image are visible to the naked eye. On the other hand, a test was done on the Baboon image to compare the robustness of the proposed system with other investigations, evaluating the correlation, contrast, energy, homogeneity, MSE, PSNR and quality index. The results generated were compared with the work of other authors concluding our system provides greater security, integrity, high sensitivity to the keys, it is not linked to a single chaotic system and can be applied to hide imperceptibly all kinds of information, in: radiographs, videos, files, official documents, and other types of containers.","PeriodicalId":21285,"journal":{"name":"Revista Ingenieria E Investigacion","volume":"1 1","pages":"61-69"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87940911","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 : 2018-05-01DOI: 10.15446/ING.INVESTIG.V38N2.65305
F. B. Mendonça, G. Urgessa, J. Rocco
This paper presents results from blast tests conducted on four 50 MPa concrete slabs with reinforcement ratios of 0,175% and 0,37%. Two of the slabs were retrofitted with 50 mm thick foam in order to investigate the potential of using the foam as a strengthening option. The slabs were simply supported on two sides. Non-confined PBX (Plastic bonded explosive) was molded with the form of a cylinder measuring 20 cm in height and 10,5 cm in diameter. The explosive was detonated at 2 m stand-off distance. The equivalent TNT mass of the explosive ranges from 2,58 to 2,72 kg for the four tests. Accelerometers, displacement and pressure gages were used to measure blast wave parameters and global response of the slabs. A high-speed digital camera in conjunction with a rugged notebook recorded images. Qualitative and quantitative results are included. Slabs retrofitted with foam showed a different pressure pattern as recorded by the sensors and resulted in higher displacement, acceleration and linear momentum.
{"title":"Experimental investigation of 50 MPa reinforced concrete slabs subjected to blast loading","authors":"F. B. Mendonça, G. Urgessa, J. Rocco","doi":"10.15446/ING.INVESTIG.V38N2.65305","DOIUrl":"https://doi.org/10.15446/ING.INVESTIG.V38N2.65305","url":null,"abstract":"This paper presents results from blast tests conducted on four 50 MPa concrete slabs with reinforcement ratios of 0,175% and 0,37%. Two of the slabs were retrofitted with 50 mm thick foam in order to investigate the potential of using the foam as a strengthening option. The slabs were simply supported on two sides. Non-confined PBX (Plastic bonded explosive) was molded with the form of a cylinder measuring 20 cm in height and 10,5 cm in diameter. The explosive was detonated at 2 m stand-off distance. The equivalent TNT mass of the explosive ranges from 2,58 to 2,72 kg for the four tests. Accelerometers, displacement and pressure gages were used to measure blast wave parameters and global response of the slabs. A high-speed digital camera in conjunction with a rugged notebook recorded images. Qualitative and quantitative results are included. Slabs retrofitted with foam showed a different pressure pattern as recorded by the sensors and resulted in higher displacement, acceleration and linear momentum.","PeriodicalId":21285,"journal":{"name":"Revista Ingenieria E Investigacion","volume":"23 1","pages":"27-33"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87226606","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：