Pub Date : 2016-02-22DOI: 10.17230/INGCIENCIA.12.23.7
Carlos A. Ararat, Edwin A. Murillo
Abstract In this work, low density polyethylene (LDPE) was modified in the melt state with a maleinized hyperbranched polyester polyol (HBPAM), using several proportions of dicumyl peroxide (0.5, 1.0, 1.5 and 2.0 %). Infrared analysis showed the signals of OH, C=O, -COOR and -C=C- groups of the HBPAM in the spectra of the functionalized samples (LDPE-g-HBPAM). Grafting degree (GD) was between 9.14 and 9.82 %. Melt flow index of the samples LDPE-g-HBPAM was lower than that of the LDPE, and it did not exhibit dependency on the dicumyl peroxide content and GI. Except for the sample obtained with a 2.0 % of dicumyl peroxide, all melting temperatures of the samples of LDPE-g-HBPAM were similar to that of the LDPE. The melting enthalpy of the samples LDPE-g-HBPAM decreased with the concentration of dicumyl peroxide and GD. The tensile modulus of these samples was higher than that of LDPE, but the elongation at break was lower
{"title":"Polietileno de baja densidad funcionalizado con un poliéster poliol altamente ramificado maleinizado","authors":"Carlos A. Ararat, Edwin A. Murillo","doi":"10.17230/INGCIENCIA.12.23.7","DOIUrl":"https://doi.org/10.17230/INGCIENCIA.12.23.7","url":null,"abstract":"Abstract In this work, low density polyethylene (LDPE) was modified in the melt state with a maleinized hyperbranched polyester polyol (HBPAM), using several proportions of dicumyl peroxide (0.5, 1.0, 1.5 and 2.0 %). Infrared analysis showed the signals of OH, C=O, -COOR and -C=C- groups of the HBPAM in the spectra of the functionalized samples (LDPE-g-HBPAM). Grafting degree (GD) was between 9.14 and 9.82 %. Melt flow index of the samples LDPE-g-HBPAM was lower than that of the LDPE, and it did not exhibit dependency on the dicumyl peroxide content and GI. Except for the sample obtained with a 2.0 % of dicumyl peroxide, all melting temperatures of the samples of LDPE-g-HBPAM were similar to that of the LDPE. The melting enthalpy of the samples LDPE-g-HBPAM decreased with the concentration of dicumyl peroxide and GD. The tensile modulus of these samples was higher than that of LDPE, but the elongation at break was lower","PeriodicalId":30405,"journal":{"name":"Ingenieria y Ciencia","volume":"301 1","pages":"127-144"},"PeriodicalIF":0.0,"publicationDate":"2016-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.17230/INGCIENCIA.12.23.7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67422326","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 : 2016-02-22DOI: 10.17230/INGCIENCIA.12.23.6
Edisson S. Castaño Mesa, Sebastián H. Quintana, Iván D. Bedoya, Andrés Adolfo Amell Arrieta
This article presents the evaluation of some of these methodologies applied to a high compression ratio-spark ignition engine, which was achieved through modification of a commercial Diesel engine. The accuracy on calculation of equivalence ratio from exhaust gas analysis and the start of combustion from mass fraction burned has been tested. The effect of trapped mass on the in-cylinder energy balance was determined. The results suggest that the tested methodologies for calculation of equivalence ratio, start of combustion, and trapped are reliable tools for evaluation of quality of data and studying spark ignition engines with high compression ratios.
{"title":"Criterios para el procesamiento y evaluación de datos experimentales para un motor de encendido provocado de alta relación de compresión","authors":"Edisson S. Castaño Mesa, Sebastián H. Quintana, Iván D. Bedoya, Andrés Adolfo Amell Arrieta","doi":"10.17230/INGCIENCIA.12.23.6","DOIUrl":"https://doi.org/10.17230/INGCIENCIA.12.23.6","url":null,"abstract":"This article presents the evaluation of some of these methodologies applied to a high compression ratio-spark ignition engine, which was achieved through modification of a commercial Diesel engine. The accuracy on calculation of equivalence ratio from exhaust gas analysis and the start of combustion from mass fraction burned has been tested. The effect of trapped mass on the in-cylinder energy balance was determined. The results suggest that the tested methodologies for calculation of equivalence ratio, start of combustion, and trapped are reliable tools for evaluation of quality of data and studying spark ignition engines with high compression ratios.","PeriodicalId":30405,"journal":{"name":"Ingenieria y Ciencia","volume":"16 1","pages":"107-125"},"PeriodicalIF":0.0,"publicationDate":"2016-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67422241","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 : 2016-02-22DOI: 10.17230/INGCIENCIA.12.23.1
J. González, J. Restrepo, C. Portilla, A. R. Muñoz, Federico Sequeda Osorio
Using Density Functional Theory (DFT) SiN and TiN structures were simulated, in order to study the influence of the silicon atoms insertion in the TiN lattice placed on interstitial and substitutional positions in a face centered cubic (FCC) crystalline lattice. Results showed that the SiN FCC structure is pseudo-stable; meanwhile the tetragonal structure is stable with ceramic behavior. The TiN FCC structure is stable with ceramic behavior similar to SiN Tetragonal. 21% silicon atoms insertion in interstitial positions showed high induced deformation, high polarization and Si N bond formation, indication an amorphous transition that could lead to the production of a material composed from TiN grains or nano-grains embedded in a Si N amorphous matrix. When
{"title":"Influence of Si Atoms Insertion on the Formation of the Ti-Si-N Composite by DFT Simulation","authors":"J. González, J. Restrepo, C. Portilla, A. R. Muñoz, Federico Sequeda Osorio","doi":"10.17230/INGCIENCIA.12.23.1","DOIUrl":"https://doi.org/10.17230/INGCIENCIA.12.23.1","url":null,"abstract":"Using Density Functional Theory (DFT) SiN and TiN structures were simulated, in order to study the influence of the silicon atoms insertion in the TiN lattice placed on interstitial and substitutional positions in a face centered cubic (FCC) crystalline lattice. Results showed that the SiN FCC structure is pseudo-stable; meanwhile the tetragonal structure is stable with ceramic behavior. The TiN FCC structure is stable with ceramic behavior similar to SiN Tetragonal. 21% silicon atoms insertion in interstitial positions showed high induced deformation, high polarization and Si N bond formation, indication an amorphous transition that could lead to the production of a material composed from TiN grains or nano-grains embedded in a Si N amorphous matrix. When","PeriodicalId":30405,"journal":{"name":"Ingenieria y Ciencia","volume":"12 1","pages":"11-23"},"PeriodicalIF":0.0,"publicationDate":"2016-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67421996","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 : 2016-02-22DOI: 10.17230/INGCIENCIA.12.23.3
J. Ángel, P. Duque
Abstract This paper presents a mathematical programing model that supports the design of timetables of classes in primary and secondary educational institutions, allowing the decision maker to take into account the constraints and variables that are commonly associated to this problem. Our model differs from most of those in the literature as the objective function aims at maximizing the number of blocks, two consecutive hours of lecture devoted to the same subject, which favors the learning process, optimizes teachers' agendas by reducing idle times and reduces cost and contractual difficulties. The model is validated using a real instance of a middle size institution for which the current timetable is considerably improved. Additionally, computational experiments with larger instances were carried on in order to test the capacity of the model for which promising results were obtained
{"title":"Modelo lineal para la programación de clases en una institución educativa","authors":"J. Ángel, P. Duque","doi":"10.17230/INGCIENCIA.12.23.3","DOIUrl":"https://doi.org/10.17230/INGCIENCIA.12.23.3","url":null,"abstract":"Abstract This paper presents a mathematical programing model that supports the design of timetables of classes in primary and secondary educational institutions, allowing the decision maker to take into account the constraints and variables that are commonly associated to this problem. Our model differs from most of those in the literature as the objective function aims at maximizing the number of blocks, two consecutive hours of lecture devoted to the same subject, which favors the learning process, optimizes teachers' agendas by reducing idle times and reduces cost and contractual difficulties. The model is validated using a real instance of a middle size institution for which the current timetable is considerably improved. Additionally, computational experiments with larger instances were carried on in order to test the capacity of the model for which promising results were obtained","PeriodicalId":30405,"journal":{"name":"Ingenieria y Ciencia","volume":"12 1","pages":"47-71"},"PeriodicalIF":0.0,"publicationDate":"2016-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.17230/INGCIENCIA.12.23.3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67422078","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 : 2016-02-22DOI: 10.17230/INGCIENCIA.12.23.2
B. Macias, C. Amaya
Abstract The arc routing problem with a variable starting/ending position (Open Capacitated Arc Routing Problem - OCARP), in its classic version, pursues the best strategy to serve a set of customers located in the network arcs using vehicles. Compared to the Capacitated Arc Routing Problem (CARP), the OCARP lacks of constrains that guarantee that each vehicle ought to start and end the tour at a given vertex (also known as a depot). The aim of this paper is to propose a heuristic to find an efficient frontier for the main objective functions: minimize the number of vehicles and the total cost. Additionally, a hybrid algorithm that complements the genetic algorithm with artificial intelligence operator is proposed.
具有可变起始/结束位置的圆弧路由问题(Open Capacitated arc routing problem - OCARP)的经典版本追求的是利用车辆为位于网络圆弧中的一组客户提供服务的最佳策略。与有能力弧线路由问题(CARP)相比，OCARP缺乏保证每辆车应该在给定顶点(也称为仓库)开始和结束巡回的约束。本文的目的是提出一种启发式方法来寻找主要目标函数的有效边界:最小化车辆数量和总成本。此外，提出了一种将遗传算法与人工智能算子相结合的混合算法。
{"title":"Algoritmo memético con operadores de inteligencia artificial para el CARP con inicio y fin no determinado y bi-objetivo","authors":"B. Macias, C. Amaya","doi":"10.17230/INGCIENCIA.12.23.2","DOIUrl":"https://doi.org/10.17230/INGCIENCIA.12.23.2","url":null,"abstract":"Abstract The arc routing problem with a variable starting/ending position (Open Capacitated Arc Routing Problem - OCARP), in its classic version, pursues the best strategy to serve a set of customers located in the network arcs using vehicles. Compared to the Capacitated Arc Routing Problem (CARP), the OCARP lacks of constrains that guarantee that each vehicle ought to start and end the tour at a given vertex (also known as a depot). The aim of this paper is to propose a heuristic to find an efficient frontier for the main objective functions: minimize the number of vehicles and the total cost. Additionally, a hybrid algorithm that complements the genetic algorithm with artificial intelligence operator is proposed.","PeriodicalId":30405,"journal":{"name":"Ingenieria y Ciencia","volume":"12 1","pages":"25-46"},"PeriodicalIF":0.0,"publicationDate":"2016-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67422311","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 : 2015-08-14DOI: 10.17230/INGCIENCIA.11.22.10
M. Jerez-Carrizales, J. E. Jaramillo, D. Fuentes
In this work a review about the most relevant methods found in the literature to model the multiphase flow in pipelines is presented. It includes the traditional simplified and mechanistic models, moreover, principles of the drift flux model and the two fluid model are explained. Even though, it is possible to find several models in the literature, no one is able to reproduce all flow conditions presented in the oil industry. Therefore, some issues reported by different authors related to model validation are here also discussed.
{"title":"Prediction of Multiphase Flow in Pipelines: Literature Review","authors":"M. Jerez-Carrizales, J. E. Jaramillo, D. Fuentes","doi":"10.17230/INGCIENCIA.11.22.10","DOIUrl":"https://doi.org/10.17230/INGCIENCIA.11.22.10","url":null,"abstract":"In this work a review about the most relevant methods found in the literature to model the multiphase flow in pipelines is presented. It includes the traditional simplified and mechanistic models, moreover, principles of the drift flux model and the two fluid model are explained. Even though, it is possible to find several models in the literature, no one is able to reproduce all flow conditions presented in the oil industry. Therefore, some issues reported by different authors related to model validation are here also discussed.","PeriodicalId":30405,"journal":{"name":"Ingenieria y Ciencia","volume":"11 1","pages":"213-233"},"PeriodicalIF":0.0,"publicationDate":"2015-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.17230/INGCIENCIA.11.22.10","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67421825","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 : 2015-08-06DOI: 10.17230/INGCIENCIA.11.22.1
D. Velasquez, L. M. Giraldo
In this article, we report the experimental values of required exposure to obtain the maximum diffraction efficiencies in PFG-03C Slavich film on independent recordings and RGB multiplexed recordings. Also, color adjustments by modifying wavelength channels contribution on reflection diffraction gratings, and color composition changes on Denisyuk holograms observed by using different spectral compositions light sources were studied and presented.
{"title":"Diffraction Efficiency Adjustment to Record High Quality Color Holograms","authors":"D. Velasquez, L. M. Giraldo","doi":"10.17230/INGCIENCIA.11.22.1","DOIUrl":"https://doi.org/10.17230/INGCIENCIA.11.22.1","url":null,"abstract":"In this article, we report the experimental values of required exposure to obtain the maximum diffraction efficiencies in PFG-03C Slavich film on independent recordings and RGB multiplexed recordings. Also, color adjustments by modifying wavelength channels contribution on reflection diffraction gratings, and color composition changes on Denisyuk holograms observed by using different spectral compositions light sources were studied and presented.","PeriodicalId":30405,"journal":{"name":"Ingenieria y Ciencia","volume":"11 1","pages":"9-23"},"PeriodicalIF":0.0,"publicationDate":"2015-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67421541","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 : 2015-08-04DOI: 10.17230/INGCIENCIA.11.22.8
E. Ciro, J. Parra, M. Zapata, E. Murillo
This study evaluates the influence of recycled rubber (RR) with a specific particle size in the properties of blends, blended recycled polypropylene/polyethylene (RPP) and RR (RPP/RR). The proportions of RPP/RR employed to obtain the blends were as follows: 90/10 (PP90), 75/25 (PP75), 60/40 (PP60) and 45/55 (PP45). The particle size of the RR employed was 850 µm . The properties of the blends were evaluated by rheometric, thermogravimetric (TGA), differential scanning calorimetric (DSC), scanning electronic microscopy (SEM), density, melt flow index and tensile analysis. The maximum torque increased with the RPP content. By DSC analysis, it was observed that the RPP exhibited two melting temperatures, the first corresponded to low density polyethylene (LDPE) and the second to polypropylene (PP). Furthermore, the RR affected the crystallinity of the RPP. By using SEM and TGA analyses, it was determined that the RPP as well as RR contained fillers. The blend densities were higher than those of RPP. The melt flow index exhibited a trend with the amount of RR.PACS: 61.25.hk, 83.80.Va, 81.05.Lg
{"title":"Effect of the Recycled Rubber on the Properties of Recycled Rubber/Recycled Polypropylene Blends","authors":"E. Ciro, J. Parra, M. Zapata, E. Murillo","doi":"10.17230/INGCIENCIA.11.22.8","DOIUrl":"https://doi.org/10.17230/INGCIENCIA.11.22.8","url":null,"abstract":"This study evaluates the influence of recycled rubber (RR) with a specific particle size in the properties of blends, blended recycled polypropylene/polyethylene (RPP) and RR (RPP/RR). The proportions of RPP/RR employed to obtain the blends were as follows: 90/10 (PP90), 75/25 (PP75), 60/40 (PP60) and 45/55 (PP45). The particle size of the RR employed was 850 µm . The properties of the blends were evaluated by rheometric, thermogravimetric (TGA), differential scanning calorimetric (DSC), scanning electronic microscopy (SEM), density, melt flow index and tensile analysis. The maximum torque increased with the RPP content. By DSC analysis, it was observed that the RPP exhibited two melting temperatures, the first corresponded to low density polyethylene (LDPE) and the second to polypropylene (PP). Furthermore, the RR affected the crystallinity of the RPP. By using SEM and TGA analyses, it was determined that the RPP as well as RR contained fillers. The blend densities were higher than those of RPP. The melt flow index exhibited a trend with the amount of RR.PACS: 61.25.hk, 83.80.Va, 81.05.Lg","PeriodicalId":30405,"journal":{"name":"Ingenieria y Ciencia","volume":"11 1","pages":"173-188"},"PeriodicalIF":0.0,"publicationDate":"2015-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67422354","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 : 2015-08-04DOI: 10.17230/INGCIENCIA.11.22.9
J.C.V.N.A Ferreira, G. Acuña, Javier Emilio Sierra Carrillo
En este articulo se propone el uso de la teoria de juegos cooperativos, apoyados en el uso del juego de la bancarrota y el valor de Shapley, como estrategia para optimizar la asignacion de recursos en cada nodo, acorde con la demanda en el servicio, el numero de estaciones y las condiciones del canal PLC. El articulo plantea un escenario bajo condiciones de trafico saturado, con el fin de evaluar el grado de optimizacion que el valor de Shapley puede realizar ante condiciones de trafico y de canal claramente establecidas. Se concluye que el uso de la teoria juegos cooperativos, soportado en el valor de Shapley, puede considerarse como una excelente alternativa a la hora de realizar procesos de optimizacion de recursos en un canal PLC y con la posibilidad de ser implementado en sistemas embebidos de bajo costo, debido a que no requiere de operaciones complejas para su estimacion. MSC: 91A12,90C26 | PACS: 02.50.Le, 84.40.Ua, 02.50.Le
{"title":"El valor de shapley como estrategia de optimización de recursos sobre Power Line Communication (PLC)","authors":"J.C.V.N.A Ferreira, G. Acuña, Javier Emilio Sierra Carrillo","doi":"10.17230/INGCIENCIA.11.22.9","DOIUrl":"https://doi.org/10.17230/INGCIENCIA.11.22.9","url":null,"abstract":"En este articulo se propone el uso de la teoria de juegos cooperativos, apoyados en el uso del juego de la bancarrota y el valor de Shapley, como estrategia para optimizar la asignacion de recursos en cada nodo, acorde con la demanda en el servicio, el numero de estaciones y las condiciones del canal PLC. El articulo plantea un escenario bajo condiciones de trafico saturado, con el fin de evaluar el grado de optimizacion que el valor de Shapley puede realizar ante condiciones de trafico y de canal claramente establecidas. Se concluye que el uso de la teoria juegos cooperativos, soportado en el valor de Shapley, puede considerarse como una excelente alternativa a la hora de realizar procesos de optimizacion de recursos en un canal PLC y con la posibilidad de ser implementado en sistemas embebidos de bajo costo, debido a que no requiere de operaciones complejas para su estimacion. MSC: 91A12,90C26 | PACS: 02.50.Le, 84.40.Ua, 02.50.Le","PeriodicalId":30405,"journal":{"name":"Ingenieria y Ciencia","volume":"11 1","pages":"189-211"},"PeriodicalIF":0.0,"publicationDate":"2015-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67421942","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 : 2015-08-04DOI: 10.17230/INGCIENCIA.11.22.6
Ó. Melo, Carlos A. Falla, J. A. Jiménez-Moscoso
This paper provides a methodology alternative for the detection of in- fluential observations in factorial design of fixed effects 3 ω . Our proposal is developed through the approach of the test statistic (Fq), and the characterization of the impact of such observations on the analysis, the sums of squares and the estimators of the model that describes the experimental design.MSC: 62K15, 62E15, 62-07, 62J20
{"title":"Efecto de datos influyentes en el análisis de diseños factoriales de efectos fijos 3 ω","authors":"Ó. Melo, Carlos A. Falla, J. A. Jiménez-Moscoso","doi":"10.17230/INGCIENCIA.11.22.6","DOIUrl":"https://doi.org/10.17230/INGCIENCIA.11.22.6","url":null,"abstract":"This paper provides a methodology alternative for the detection of in- fluential observations in factorial design of fixed effects 3 ω . Our proposal is developed through the approach of the test statistic (Fq), and the characterization of the impact of such observations on the analysis, the sums of squares and the estimators of the model that describes the experimental design.MSC: 62K15, 62E15, 62-07, 62J20","PeriodicalId":30405,"journal":{"name":"Ingenieria y Ciencia","volume":"11 1","pages":"121-150"},"PeriodicalIF":0.0,"publicationDate":"2015-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67422261","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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