Pub Date : 2014-12-01DOI: 10.1109/IEEM.2014.7058755
K. Ng, K. Chong, G. Goh
In today's turbulent and competitive business environment, many organizations are forced to implement various productivity improvement programs in order to continue to survive. One of the many approaches to improve production performance is to develop and implement total productive maintenance. Total productive maintenance (TPM) is a world-class manufacturing strategy which leading manufacturing near to ideal condition with zero down time, zero defect, lean production, just-in-time production (JIT) and competitive cost leader in order to gain competitive advantage. The most common metric utilized by management to gauge the effectiveness and successful implementation of TPM is Overall Equipment Effectiveness (OEE). OEE is a powerful key performance indicator focusing on equipment availability, performance efficiency and quality rate. This paper discussed on the use of the DMAIC approach to systematically Define, Measure, Analyze, Improve and Control the equipment performance. The purpose of this paper is to discuss and highlight the adoption of the six-sigma methodology to mitigate the bottleneck process which focuses mainly on the current OEE performance.
{"title":"Improving Overall Equipment Effectiveness (OEE) through the six sigma methodology in a semiconductor firm: A case study","authors":"K. Ng, K. Chong, G. Goh","doi":"10.1109/IEEM.2014.7058755","DOIUrl":"https://doi.org/10.1109/IEEM.2014.7058755","url":null,"abstract":"In today's turbulent and competitive business environment, many organizations are forced to implement various productivity improvement programs in order to continue to survive. One of the many approaches to improve production performance is to develop and implement total productive maintenance. Total productive maintenance (TPM) is a world-class manufacturing strategy which leading manufacturing near to ideal condition with zero down time, zero defect, lean production, just-in-time production (JIT) and competitive cost leader in order to gain competitive advantage. The most common metric utilized by management to gauge the effectiveness and successful implementation of TPM is Overall Equipment Effectiveness (OEE). OEE is a powerful key performance indicator focusing on equipment availability, performance efficiency and quality rate. This paper discussed on the use of the DMAIC approach to systematically Define, Measure, Analyze, Improve and Control the equipment performance. The purpose of this paper is to discuss and highlight the adoption of the six-sigma methodology to mitigate the bottleneck process which focuses mainly on the current OEE performance.","PeriodicalId":318405,"journal":{"name":"2014 IEEE International Conference on Industrial Engineering and Engineering Management","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125681863","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 : 2014-12-01DOI: 10.1109/IEEM.2014.7058878
Y. A. Báez, Manuel A. Rodriguez, Jorge Limon, Diego A. Tlapa
This study presents the construction of a human reliability model for assembly line manual workers, using Cox's Proportional Risk model. Nine factors were identified in 120 assembly line operators using psychometric tests. Subsequently, the factors of stress, motivation, memory, and personality were identified, using a multiple linear regression analysis, as those that significantly contribute to the occurrence of human error and, together, are considered as the worker's operational environment. The parameters were defined for the distribution of base failures for modeling the rate of human risk. The model obtained enables the establishment of the contribution of each factor to the probability that human errors will be committed within a determined period of time.
{"title":"Model of human reliability for manual workers in assembly lines","authors":"Y. A. Báez, Manuel A. Rodriguez, Jorge Limon, Diego A. Tlapa","doi":"10.1109/IEEM.2014.7058878","DOIUrl":"https://doi.org/10.1109/IEEM.2014.7058878","url":null,"abstract":"This study presents the construction of a human reliability model for assembly line manual workers, using Cox's Proportional Risk model. Nine factors were identified in 120 assembly line operators using psychometric tests. Subsequently, the factors of stress, motivation, memory, and personality were identified, using a multiple linear regression analysis, as those that significantly contribute to the occurrence of human error and, together, are considered as the worker's operational environment. The parameters were defined for the distribution of base failures for modeling the rate of human risk. The model obtained enables the establishment of the contribution of each factor to the probability that human errors will be committed within a determined period of time.","PeriodicalId":318405,"journal":{"name":"2014 IEEE International Conference on Industrial Engineering and Engineering Management","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130717822","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 : 2014-12-01DOI: 10.1109/IEEM.2014.7058685
M. F. M. Taib, M. Yun
Psychosocial stress is a common phenomenon in a working world. There are indications that psychosocial stress will increase muscle activity and eventually contribute to musculoskeletal disorders problem. The aim of this review is to identify the effect of psychosocial stress during computer work towards trapezius muscle activity. Another objective is to identify and categorize the task and condition used by previous researchers to induce the stress for future study. A systematic literature search has been conducted and 25 articles have been included in this paper. In conclusion, most of previous study have been recognized the effect of psychosocial stress on trapezius muscle activity during computer work. Besides that, several types of tasks have been recognized to induce stress among subjects.
{"title":"The effect of psychosocial stress on trapezius muscle activity during computer work: A review","authors":"M. F. M. Taib, M. Yun","doi":"10.1109/IEEM.2014.7058685","DOIUrl":"https://doi.org/10.1109/IEEM.2014.7058685","url":null,"abstract":"Psychosocial stress is a common phenomenon in a working world. There are indications that psychosocial stress will increase muscle activity and eventually contribute to musculoskeletal disorders problem. The aim of this review is to identify the effect of psychosocial stress during computer work towards trapezius muscle activity. Another objective is to identify and categorize the task and condition used by previous researchers to induce the stress for future study. A systematic literature search has been conducted and 25 articles have been included in this paper. In conclusion, most of previous study have been recognized the effect of psychosocial stress on trapezius muscle activity during computer work. Besides that, several types of tasks have been recognized to induce stress among subjects.","PeriodicalId":318405,"journal":{"name":"2014 IEEE International Conference on Industrial Engineering and Engineering Management","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132974162","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 : 2014-12-01DOI: 10.1109/IEEM.2014.7058591
Shuli Wu, Songlin Chen
Product line design and pricing are crucial activities for a firm's success especially in a competitive market with high product variety. Recent literature has reported various profit-maximization models with product mix and prices as decision variables. Product mix is a discrete variable while price is treated as a continuous variable. Optimizing both mix and price simultaneously can be challenging. This paper utilizes discrete choice model and activity-based costing to formulate market demand and manufacturing cost of a product line and proposes a bi-level algorithm, which uses genetic algorithm for optimizing product mix and differential evolutionary for optimizing prices for a product line. A case study on smart phones is carried out to illustrate this optimization algorithm.
{"title":"A Bi-level algorithm for product line design and pricing","authors":"Shuli Wu, Songlin Chen","doi":"10.1109/IEEM.2014.7058591","DOIUrl":"https://doi.org/10.1109/IEEM.2014.7058591","url":null,"abstract":"Product line design and pricing are crucial activities for a firm's success especially in a competitive market with high product variety. Recent literature has reported various profit-maximization models with product mix and prices as decision variables. Product mix is a discrete variable while price is treated as a continuous variable. Optimizing both mix and price simultaneously can be challenging. This paper utilizes discrete choice model and activity-based costing to formulate market demand and manufacturing cost of a product line and proposes a bi-level algorithm, which uses genetic algorithm for optimizing product mix and differential evolutionary for optimizing prices for a product line. A case study on smart phones is carried out to illustrate this optimization algorithm.","PeriodicalId":318405,"journal":{"name":"2014 IEEE International Conference on Industrial Engineering and Engineering Management","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130420878","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 : 2014-12-01DOI: 10.1109/IEEM.2014.7058691
A. Kampker, P. Burggräf, Yvonne Baumers
In order to be competitive, companies have to reduce their production costs and thus their assembly costs with increasing quality requirements. To achieve this, companies plan their assembly processes as detailed as possible. Simultaneously, because of an expending range of products with numerous variants, small batches and shorter product life cycles, the question arises, to what extent the effort of a detailed planning is still justified. In order to confirm the described practical problem and in order to validate first solution hypotheses on the determination of an economical planning depth of the assembly planning, a preliminary study was conducted at the WZL (Laboratory for Machine Tools and Production Engineering) of the RWTH Aachen University. The results of this study are presented in the following paper.
{"title":"Economic level of detail for assembly planning","authors":"A. Kampker, P. Burggräf, Yvonne Baumers","doi":"10.1109/IEEM.2014.7058691","DOIUrl":"https://doi.org/10.1109/IEEM.2014.7058691","url":null,"abstract":"In order to be competitive, companies have to reduce their production costs and thus their assembly costs with increasing quality requirements. To achieve this, companies plan their assembly processes as detailed as possible. Simultaneously, because of an expending range of products with numerous variants, small batches and shorter product life cycles, the question arises, to what extent the effort of a detailed planning is still justified. In order to confirm the described practical problem and in order to validate first solution hypotheses on the determination of an economical planning depth of the assembly planning, a preliminary study was conducted at the WZL (Laboratory for Machine Tools and Production Engineering) of the RWTH Aachen University. The results of this study are presented in the following paper.","PeriodicalId":318405,"journal":{"name":"2014 IEEE International Conference on Industrial Engineering and Engineering Management","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125492635","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 : 2014-12-01DOI: 10.1109/IEEM.2014.7058801
Ramin Shahzadi, M. Sadeghi, A. Aghaz
Since late 1990s, the increasing number of complex and knowledge based industries in one hand, and formation of IT-based communications on the other hand, have raised the possibility of communication in international projects between different groups from several countries around the world. Nowadays, the emergence of multinational and massive scale projects is increasing. For such projects, traditional and routine frameworks should be replaced by some new concepts such as mega projects, distributed projects and GVT (Global Virtual Teams). Although conflicts are natural and inevitable in the distributed projects, inadequate attention to proper management of conflict, specifically in distributed projects facing with several sources of conflicts, can lead to ineffectiveness of such projects. So, the purpose of our research is to investigate and classify the sources of conflicts in distributed projects and to develop the methods to manage the identified conflicts. Data was gathered using questionnaires and interviews. Results indicated three elements including team members, process and technology as the main factors causing conflict in distributed projects. At the end, some future orientations have been suggested for future research.
{"title":"Managing conflict in distributed projects","authors":"Ramin Shahzadi, M. Sadeghi, A. Aghaz","doi":"10.1109/IEEM.2014.7058801","DOIUrl":"https://doi.org/10.1109/IEEM.2014.7058801","url":null,"abstract":"Since late 1990s, the increasing number of complex and knowledge based industries in one hand, and formation of IT-based communications on the other hand, have raised the possibility of communication in international projects between different groups from several countries around the world. Nowadays, the emergence of multinational and massive scale projects is increasing. For such projects, traditional and routine frameworks should be replaced by some new concepts such as mega projects, distributed projects and GVT (Global Virtual Teams). Although conflicts are natural and inevitable in the distributed projects, inadequate attention to proper management of conflict, specifically in distributed projects facing with several sources of conflicts, can lead to ineffectiveness of such projects. So, the purpose of our research is to investigate and classify the sources of conflicts in distributed projects and to develop the methods to manage the identified conflicts. Data was gathered using questionnaires and interviews. Results indicated three elements including team members, process and technology as the main factors causing conflict in distributed projects. At the end, some future orientations have been suggested for future research.","PeriodicalId":318405,"journal":{"name":"2014 IEEE International Conference on Industrial Engineering and Engineering Management","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123347722","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 : 2014-12-01DOI: 10.1109/IEEM.2014.7058747
C. Wirawan, A. Ayu
Theory of Inventive Problem Solving (TRIZ) is a method that support innovative and creative solution in designing product. This research try to combine TRIZ with SERVQUAL, Kano, Fault Tree Analysis (FTA) and Failure Mode Effect Analysis (FMEA) to And systematic innovative and creative improvement for service quality in service industry. TRIZ used to solve contradictions occur in service quality improvement identified by FTA and FMEA. As case study, DAMRI is taken. Perum DAMRI is public bus transportation company in Bandung managed by Indonesian Government as Badan Usaha Milik Negara (BUMN) DAMRI charge relatively cheap cost, but have no good image because of poor service quality. Earlier research have been done by Ayu to identify factors to improve service quality using SERVQUAL measurement, Kano, FTA and FMEA. It's found that there are several poor service quality causes that must be improved, nevertheless several attributes contradict each other that troublesome improvement effort.
创造性问题解决理论(TRIZ)是一种在产品设计中支持创新和创造性解决方案的方法。本研究尝试将TRIZ与SERVQUAL、Kano、故障树分析(FTA)和失效模式效应分析(FMEA)相结合，对服务业的服务质量进行系统的创新和创造性改进。TRIZ用于解决FTA和FMEA识别的服务质量改进过程中出现的矛盾。以DAMRI为例进行了研究。Perum DAMRI是印尼政府在万隆管理的公共巴士运输公司，名为Badan Usaha Milik Negara (BUMN) DAMRI，收费相对便宜，但由于服务质量差，形象不佳。Ayu早前利用SERVQUAL测量、Kano、FTA和FMEA等方法对服务质量的影响因素进行了研究。研究发现，有几个服务质量差的原因必须改进，然而，一些属性相互矛盾，使改进工作变得麻烦。
{"title":"TRIZ based approach to improve public bus service quality","authors":"C. Wirawan, A. Ayu","doi":"10.1109/IEEM.2014.7058747","DOIUrl":"https://doi.org/10.1109/IEEM.2014.7058747","url":null,"abstract":"Theory of Inventive Problem Solving (TRIZ) is a method that support innovative and creative solution in designing product. This research try to combine TRIZ with SERVQUAL, Kano, Fault Tree Analysis (FTA) and Failure Mode Effect Analysis (FMEA) to And systematic innovative and creative improvement for service quality in service industry. TRIZ used to solve contradictions occur in service quality improvement identified by FTA and FMEA. As case study, DAMRI is taken. Perum DAMRI is public bus transportation company in Bandung managed by Indonesian Government as Badan Usaha Milik Negara (BUMN) DAMRI charge relatively cheap cost, but have no good image because of poor service quality. Earlier research have been done by Ayu to identify factors to improve service quality using SERVQUAL measurement, Kano, FTA and FMEA. It's found that there are several poor service quality causes that must be improved, nevertheless several attributes contradict each other that troublesome improvement effort.","PeriodicalId":318405,"journal":{"name":"2014 IEEE International Conference on Industrial Engineering and Engineering Management","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126355928","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 : 2014-12-01DOI: 10.1109/IEEM.2014.7058718
S. Teng, E. Chan, Changjun Yang, Mingyen Yu, Siow Hwei Tan
In this paper, we propose a three-stage solution framework to address a large scale delivery problem consisting of about 1400 delivery points with an aim to improving delivery efficiency and reducing total delivery cost. The problem was first decomposed into a number of smaller sub-problems through a clustering method based on Binary Integer Programing (BIP) model. Then delivery routes were formed within each cluster to reduce delivery cost while satisfying various constraints. Lastly, due to the feature of the delivery problem, delivery routes were assigned to vehicles based on a Bin Packing Problem which again was formulated as a BIP model. Computational results show that the prosed framework can provide an efficient and cost effective delivery plan for the large scale delivery problem.
{"title":"An efficient solution framework for a large scale delivery problem","authors":"S. Teng, E. Chan, Changjun Yang, Mingyen Yu, Siow Hwei Tan","doi":"10.1109/IEEM.2014.7058718","DOIUrl":"https://doi.org/10.1109/IEEM.2014.7058718","url":null,"abstract":"In this paper, we propose a three-stage solution framework to address a large scale delivery problem consisting of about 1400 delivery points with an aim to improving delivery efficiency and reducing total delivery cost. The problem was first decomposed into a number of smaller sub-problems through a clustering method based on Binary Integer Programing (BIP) model. Then delivery routes were formed within each cluster to reduce delivery cost while satisfying various constraints. Lastly, due to the feature of the delivery problem, delivery routes were assigned to vehicles based on a Bin Packing Problem which again was formulated as a BIP model. Computational results show that the prosed framework can provide an efficient and cost effective delivery plan for the large scale delivery problem.","PeriodicalId":318405,"journal":{"name":"2014 IEEE International Conference on Industrial Engineering and Engineering Management","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123104723","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 : 2014-12-01DOI: 10.1109/IEEM.2014.7058833
D. Kammerl, Martin Enseleit, R. Orawski, D. M. Schmidt, M. Mörtl
Especially the early phase of the innovation process, the planning phase, is characterized by extensive decisions and a wide range of uncertainty. Hence, it is essential for product designers to understand future Product-Service System characteristics and prospective properties. Thus, in this paper we present a framework for depicting a Product-Service System model throughout the planning phase of the innovation process based on existing methodologies in product and service modeling The user of the framework should be supported in decision making and keeping the overview during the early phases of product development so crucial decisions can be made on a conceptual and reasonable basis.
{"title":"Depicting product-service systems in the early phase of the product development","authors":"D. Kammerl, Martin Enseleit, R. Orawski, D. M. Schmidt, M. Mörtl","doi":"10.1109/IEEM.2014.7058833","DOIUrl":"https://doi.org/10.1109/IEEM.2014.7058833","url":null,"abstract":"Especially the early phase of the innovation process, the planning phase, is characterized by extensive decisions and a wide range of uncertainty. Hence, it is essential for product designers to understand future Product-Service System characteristics and prospective properties. Thus, in this paper we present a framework for depicting a Product-Service System model throughout the planning phase of the innovation process based on existing methodologies in product and service modeling The user of the framework should be supported in decision making and keeping the overview during the early phases of product development so crucial decisions can be made on a conceptual and reasonable basis.","PeriodicalId":318405,"journal":{"name":"2014 IEEE International Conference on Industrial Engineering and Engineering Management","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116272194","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 : 2014-12-01DOI: 10.1109/IEEM.2014.7058787
Aldo Duchi, Golboo Pourabdollahian, Davide Sili, Matteo Cioffi, M. Taisch
ETO companies are characterized by their ability to produce purely customized goods through individualized engineering process. However, recently many of ETOs have considered a shift toward MC to operate with more stable processes to increase efficiency and decrease lead time. This paper aims at analyzing this shift from an operational point of view by developing a decision making model to support these companies in selecting the best estimation technique in terms of engineering cost.
{"title":"Proposal of a decision making model to select the best fitting cost estimation technique in an ETO-MC environment","authors":"Aldo Duchi, Golboo Pourabdollahian, Davide Sili, Matteo Cioffi, M. Taisch","doi":"10.1109/IEEM.2014.7058787","DOIUrl":"https://doi.org/10.1109/IEEM.2014.7058787","url":null,"abstract":"ETO companies are characterized by their ability to produce purely customized goods through individualized engineering process. However, recently many of ETOs have considered a shift toward MC to operate with more stable processes to increase efficiency and decrease lead time. This paper aims at analyzing this shift from an operational point of view by developing a decision making model to support these companies in selecting the best estimation technique in terms of engineering cost.","PeriodicalId":318405,"journal":{"name":"2014 IEEE International Conference on Industrial Engineering and Engineering Management","volume":"377 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115947938","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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