The paper deals with numerical model of a tram moving on the track. The rail is modelled as elastically supported continuous beam with lumped masses. A vehicle is approximated as a discrete system consisting of three rigid masses connected with linear elastic springs. Dissipation mechanisms in the system are modelled with the linear dashpots. Two basic assumptions that are used are: a) the Euler-Bernoulli beam theory and b) the separation of the wheel from the rail is not permitted. The system of differential equations of motion is solved by an implicit version of step by step method based on the direct integration technique. The algorithm is conceived on the first order predictor - (re)corrector method. The contact condition is modelled by the force method. Results of the calculations are compared with the results of measurement on the tram track. Numerical predictions for displacements and accelerations are in good agreement with the experimental findings
{"title":"Modelling of Tram-Track Interaction","authors":"S. Lakušić, D. Lazarevic","doi":"10.1109/AMS.2007.67","DOIUrl":"https://doi.org/10.1109/AMS.2007.67","url":null,"abstract":"The paper deals with numerical model of a tram moving on the track. The rail is modelled as elastically supported continuous beam with lumped masses. A vehicle is approximated as a discrete system consisting of three rigid masses connected with linear elastic springs. Dissipation mechanisms in the system are modelled with the linear dashpots. Two basic assumptions that are used are: a) the Euler-Bernoulli beam theory and b) the separation of the wheel from the rail is not permitted. The system of differential equations of motion is solved by an implicit version of step by step method based on the direct integration technique. The algorithm is conceived on the first order predictor - (re)corrector method. The contact condition is modelled by the force method. Results of the calculations are compared with the results of measurement on the tram track. Numerical predictions for displacements and accelerations are in good agreement with the experimental findings","PeriodicalId":198751,"journal":{"name":"First Asia International Conference on Modelling & Simulation (AMS'07)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130678004","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}
This paper proposes a new tool for measuring e-readiness (the investment climate) of a country. Firstly, this paper presents some of the difficulties (e.g. imprecise data) in measuring e-readiness of a country. Secondly, this paper presents a fuzzy logic model of a new tool for measuring e-readiness, as fuzzy logic is well suited for working with imprecise data. Finally, this paper presents a hybrid tool for measuring e-readiness. The hybrid model uses fuzzy logic together with array-based logic. The main reason for proposing the hybrid tool is to reduce the size of the fuzzy rules base
{"title":"Fuzzy Logic Based Model of a New Tool for Measuring E-Readiness","authors":"R. Davidrajuh","doi":"10.1109/AMS.2007.46","DOIUrl":"https://doi.org/10.1109/AMS.2007.46","url":null,"abstract":"This paper proposes a new tool for measuring e-readiness (the investment climate) of a country. Firstly, this paper presents some of the difficulties (e.g. imprecise data) in measuring e-readiness of a country. Secondly, this paper presents a fuzzy logic model of a new tool for measuring e-readiness, as fuzzy logic is well suited for working with imprecise data. Finally, this paper presents a hybrid tool for measuring e-readiness. The hybrid model uses fuzzy logic together with array-based logic. The main reason for proposing the hybrid tool is to reduce the size of the fuzzy rules base","PeriodicalId":198751,"journal":{"name":"First Asia International Conference on Modelling & Simulation (AMS'07)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129143126","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}
Replacing the aging instrumentation and control system (I&C) in a nuclear power plant (NPP) is always a difficult task, even without the present energy-distribution disturbances in Europe and the more and more frequent plant-life-extension and power-up-rating projects. The NPP plant life-cycle tends to reach 50-60 years, while that of the I&C system is only 8-10 years. Not only the systems become obsolete: spare parts for the old system are practically nonexistent. Putting into operation reliable, thoroughly tested, verified and validated, approved by the authorities new systems could significantly increase the outage time of the units. However, about 90% of the work can be done off-line, by means of full scope replica simulators, and in the same time the operators become trained to these new systems, too. Taking this approach the refurbishment does not increase the outage time needed for refuelling and repair, at least not significantly. The paper describes this methodology in detail
{"title":"Simulator-Aided Instrumentation and Control System Refurbishment at Paks Nuclear Power Plant","authors":"J. S. Janosy","doi":"10.1109/AMS.2007.94","DOIUrl":"https://doi.org/10.1109/AMS.2007.94","url":null,"abstract":"Replacing the aging instrumentation and control system (I&C) in a nuclear power plant (NPP) is always a difficult task, even without the present energy-distribution disturbances in Europe and the more and more frequent plant-life-extension and power-up-rating projects. The NPP plant life-cycle tends to reach 50-60 years, while that of the I&C system is only 8-10 years. Not only the systems become obsolete: spare parts for the old system are practically nonexistent. Putting into operation reliable, thoroughly tested, verified and validated, approved by the authorities new systems could significantly increase the outage time of the units. However, about 90% of the work can be done off-line, by means of full scope replica simulators, and in the same time the operators become trained to these new systems, too. Taking this approach the refurbishment does not increase the outage time needed for refuelling and repair, at least not significantly. The paper describes this methodology in detail","PeriodicalId":198751,"journal":{"name":"First Asia International Conference on Modelling & Simulation (AMS'07)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128764580","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}
Energy consumption is a major issue in designing protocols for ad hoc wireless networks due to battery constrains. This paper identifies the inefficient elements of expanding ring search protocol and proposes the new blocking expanding ring search approach which demonstrates substantial energy savings without an increase in route discovery latency
{"title":"Energy Efficient Expanding Ring Search","authors":"I. Park, Ida M. Pu","doi":"10.1109/AMS.2007.35","DOIUrl":"https://doi.org/10.1109/AMS.2007.35","url":null,"abstract":"Energy consumption is a major issue in designing protocols for ad hoc wireless networks due to battery constrains. This paper identifies the inefficient elements of expanding ring search protocol and proposes the new blocking expanding ring search approach which demonstrates substantial energy savings without an increase in route discovery latency","PeriodicalId":198751,"journal":{"name":"First Asia International Conference on Modelling & Simulation (AMS'07)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114443634","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}
It is the purpose of this invited paper to address issues in Arabian Gulf development Internet and innovation dynamics. In the new millennium, for biz strategy reasons as well as technological ones, we require a sound understanding of the dynamics of interaction between businesses, economies, and Internet & Web technologies. The paper also presents some original research case methods from the Arabian Gulf on innovative development Internet roles as well as the role of the Internet as a catalyst for improving regional education, business, industry, and management
{"title":"Arabian Gulf Development Internet and Innovation Dynamics","authors":"Sadiq Hussain, Z. Tahboob","doi":"10.1109/AMS.2007.17","DOIUrl":"https://doi.org/10.1109/AMS.2007.17","url":null,"abstract":"It is the purpose of this invited paper to address issues in Arabian Gulf development Internet and innovation dynamics. In the new millennium, for biz strategy reasons as well as technological ones, we require a sound understanding of the dynamics of interaction between businesses, economies, and Internet & Web technologies. The paper also presents some original research case methods from the Arabian Gulf on innovative development Internet roles as well as the role of the Internet as a catalyst for improving regional education, business, industry, and management","PeriodicalId":198751,"journal":{"name":"First Asia International Conference on Modelling & Simulation (AMS'07)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127209489","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}
The shortest capacitated path problem is a well known problem in the networking area, having a wide range of applications. In the shortest capacitated path problem, a traffic flow occurs from a source node to a destination node in a certain direction subject to a cost constraint. In this paper, a new approach for dealing with this problem is proposed. The proposed algorithm uses a special way to build valid solutions and an improvement technique to adjust the path. Some numerical experiments are performed using randomly generated networks having 25-200 nodes. Empirical results are compared with the results obtained using genetic algorithms which is an established technique for solving networking problems
{"title":"Solving Shortest Capacitated Path Problem Using a Bi-Objective Heuristic Approach","authors":"C. Grosan, A. Abraham","doi":"10.1109/AMS.2007.96","DOIUrl":"https://doi.org/10.1109/AMS.2007.96","url":null,"abstract":"The shortest capacitated path problem is a well known problem in the networking area, having a wide range of applications. In the shortest capacitated path problem, a traffic flow occurs from a source node to a destination node in a certain direction subject to a cost constraint. In this paper, a new approach for dealing with this problem is proposed. The proposed algorithm uses a special way to build valid solutions and an improvement technique to adjust the path. Some numerical experiments are performed using randomly generated networks having 25-200 nodes. Empirical results are compared with the results obtained using genetic algorithms which is an established technique for solving networking problems","PeriodicalId":198751,"journal":{"name":"First Asia International Conference on Modelling & Simulation (AMS'07)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123828952","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}
The Paks full-scope training simulator has been in service since 1988. In the last almost two decades practically every element of the simulator has been upgraded, replaced because the fast development of the computer techniques made the solution a great amount earlier unsolvable problems possible. Moreover, the requirements against the simulator have also changed. Originally the simulator was used only for training the operating personnel of the Paks Nuclear Power Plant, but now it is used as a "test bed" for new systems prior their installation on the real plant, too. The first such testing was the replacement of the Reactor Protection System with a new computerized one. For this reason the scope of the models had to be extended to cover the severe accidents, which needed a much more powerful simulator computer than the original one. The outdated control room interface system had to be replaced by a new one, because spare parts became unattainable and its service required very high cost. Only the instructor's system remained in its original form. Now the old Instructor's system has been replaced as well. All the old functions were realised by convenient full-graphic Man-Machine Interface tools. The paper describes in detail the newly added functionalities of he Instructor's system, too
{"title":"New Instructor's System of the Paks Full-Scope Training Simulator","authors":"J. S. Janosy, Bürger Gáborné, E. Vegh","doi":"10.1109/AMS.2007.71","DOIUrl":"https://doi.org/10.1109/AMS.2007.71","url":null,"abstract":"The Paks full-scope training simulator has been in service since 1988. In the last almost two decades practically every element of the simulator has been upgraded, replaced because the fast development of the computer techniques made the solution a great amount earlier unsolvable problems possible. Moreover, the requirements against the simulator have also changed. Originally the simulator was used only for training the operating personnel of the Paks Nuclear Power Plant, but now it is used as a \"test bed\" for new systems prior their installation on the real plant, too. The first such testing was the replacement of the Reactor Protection System with a new computerized one. For this reason the scope of the models had to be extended to cover the severe accidents, which needed a much more powerful simulator computer than the original one. The outdated control room interface system had to be replaced by a new one, because spare parts became unattainable and its service required very high cost. Only the instructor's system remained in its original form. Now the old Instructor's system has been replaced as well. All the old functions were realised by convenient full-graphic Man-Machine Interface tools. The paper describes in detail the newly added functionalities of he Instructor's system, too","PeriodicalId":198751,"journal":{"name":"First Asia International Conference on Modelling & Simulation (AMS'07)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132441537","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}
Our main objective is to compare distance measurement for the motion verbs from the cognitive point of view and that of computable point of view. We use motion verbs to represent moving of objects as high-level features from the cognitive point of view. In the previous works, Specially, we focus on antonym relation and not just limit research only on the basic relations (IS_A, PART_OF) in hierarchical model and get suitable weight value (0.7) using correlation coefficient. In this paper, we propose trajectory retrieval using similarity measure according to link type between motion verbs
{"title":"Trajectory Retrieval Using Similarity Measure According to Link Type between Motion Verbs","authors":"Miyoung Cho, Chang Choi, Sicheon You, Minchang Lee, Jonghei Ra, Pankoo Kim","doi":"10.1109/AMS.2007.106","DOIUrl":"https://doi.org/10.1109/AMS.2007.106","url":null,"abstract":"Our main objective is to compare distance measurement for the motion verbs from the cognitive point of view and that of computable point of view. We use motion verbs to represent moving of objects as high-level features from the cognitive point of view. In the previous works, Specially, we focus on antonym relation and not just limit research only on the basic relations (IS_A, PART_OF) in hierarchical model and get suitable weight value (0.7) using correlation coefficient. In this paper, we propose trajectory retrieval using similarity measure according to link type between motion verbs","PeriodicalId":198751,"journal":{"name":"First Asia International Conference on Modelling & Simulation (AMS'07)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131977701","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}
Practice! YUBIMOJI AIUEO (PYA) is an edutainment system to promote basic expressions of Kana characters (AIUEO) of Japanese hand alphabets (YUBIMOJI) to ordinary children at elementary school age. In this paper, we report how PYA is good in edutainment objectives based on the series of experiments at classrooms of Sumiyoshi Elementary School, in Kobe, Japan. The results have suggested that 1) even if the users do not like personal computers, they can use PYA and keep their interests, 2) PYA users keep the understanding about the hand alphabets longer, 3) they love the puppy hints and they are affective, and 4) they can memorize the character shapes. In one sentence: to use PYA is definitive
{"title":"Practice! YUBIMOJI AIUEO: An Edutainment System of Japanese Hand Alphabets for Elementary School Children","authors":"M. Namatame, F. Kusunoki, S. Inagaki, T. Terano","doi":"10.1109/AMS.2007.81","DOIUrl":"https://doi.org/10.1109/AMS.2007.81","url":null,"abstract":"Practice! YUBIMOJI AIUEO (PYA) is an edutainment system to promote basic expressions of Kana characters (AIUEO) of Japanese hand alphabets (YUBIMOJI) to ordinary children at elementary school age. In this paper, we report how PYA is good in edutainment objectives based on the series of experiments at classrooms of Sumiyoshi Elementary School, in Kobe, Japan. The results have suggested that 1) even if the users do not like personal computers, they can use PYA and keep their interests, 2) PYA users keep the understanding about the hand alphabets longer, 3) they love the puppy hints and they are affective, and 4) they can memorize the character shapes. In one sentence: to use PYA is definitive","PeriodicalId":198751,"journal":{"name":"First Asia International Conference on Modelling & Simulation (AMS'07)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132122723","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}
This paper describes the use of agent-based modeling in large, generalized data systems for microsimulation studies. First, authors present the relevant characteristics of the microsimulation application field, where agent-based models can be developed, and examine some of the salient problems and opportunities. After a short analysis of a specific meta-database, Web-service technologies, agent-based modeling techniques are discussed. Authors show how selected technologies can be applied to support agent-based, dynamic microsimulation model development. Finally, references are made to the practical use and an example is presented. The paper concludes with a summary of research results and future plans
{"title":"Toward Agent-Based Microsimulation--Another Approach","authors":"I. Molnár, Imre Sinka","doi":"10.1109/AMS.2007.104","DOIUrl":"https://doi.org/10.1109/AMS.2007.104","url":null,"abstract":"This paper describes the use of agent-based modeling in large, generalized data systems for microsimulation studies. First, authors present the relevant characteristics of the microsimulation application field, where agent-based models can be developed, and examine some of the salient problems and opportunities. After a short analysis of a specific meta-database, Web-service technologies, agent-based modeling techniques are discussed. Authors show how selected technologies can be applied to support agent-based, dynamic microsimulation model development. Finally, references are made to the practical use and an example is presented. The paper concludes with a summary of research results and future plans","PeriodicalId":198751,"journal":{"name":"First Asia International Conference on Modelling & Simulation (AMS'07)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130147058","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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