Pub Date : 2014-01-01DOI: 10.3850/978-981-09-1139-3_206
P. Desai, T. Kant
{"title":"On Numerical Analysis of Elastostatic Plate with Hole","authors":"P. Desai, T. Kant","doi":"10.3850/978-981-09-1139-3_206","DOIUrl":"https://doi.org/10.3850/978-981-09-1139-3_206","url":null,"abstract":"","PeriodicalId":22356,"journal":{"name":"Tenth International Conference on Computer Modeling and Simulation (uksim 2008)","volume":"68 1","pages":"857-861"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74012770","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 : 2014-01-01DOI: 10.3850/978-981-09-1139-3_090
Hridya P. Lal, Sunetra Sarkar, Sayan Gupta
{"title":"Reduced Order Modeling and Uncertainty Quantification for a Stochastic Linear Dynamical System","authors":"Hridya P. Lal, Sunetra Sarkar, Sayan Gupta","doi":"10.3850/978-981-09-1139-3_090","DOIUrl":"https://doi.org/10.3850/978-981-09-1139-3_090","url":null,"abstract":"","PeriodicalId":22356,"journal":{"name":"Tenth International Conference on Computer Modeling and Simulation (uksim 2008)","volume":"17 1","pages":"491-500"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88664935","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}
H. Behnam, A. Sheikhani, M. Mohammadi, M. Noroozian, P. Golabi
Electroencephalography (EEG) is a powerful, inexpensive, and underutilized neurophysiology diagnostic tool. Since EEG signals contain a wealth of information about brain functions, there are many approaches in analyzing EEG signals with spectral techniques. We have used short time Fourier transform (STFT) at 19 channel’s of EEG for 8 Asperger disorders (6-11 years old) and 10 age matched control subjects. The values were assessed with variance analysis. Results are shown that gamma band (34-44Hz) has 94.4% discriminate between two groups. Coherence measures at between 112 pairs of 19 channels EEG are shown there are abnormalities at connectivity between in right temporal lobe and frontal lobe and connectivity between right temporal lobe with other lobes.
{"title":"Abnormalities in Connectivity of Quantitative Electroencephalogram Background Activity in Asperger Disorders with Short Time Fourier Transform and Coherence Values","authors":"H. Behnam, A. Sheikhani, M. Mohammadi, M. Noroozian, P. Golabi","doi":"10.1109/UKSIM.2008.69","DOIUrl":"https://doi.org/10.1109/UKSIM.2008.69","url":null,"abstract":"Electroencephalography (EEG) is a powerful, inexpensive, and underutilized neurophysiology diagnostic tool. Since EEG signals contain a wealth of information about brain functions, there are many approaches in analyzing EEG signals with spectral techniques. We have used short time Fourier transform (STFT) at 19 channel’s of EEG for 8 Asperger disorders (6-11 years old) and 10 age matched control subjects. The values were assessed with variance analysis. Results are shown that gamma band (34-44Hz) has 94.4% discriminate between two groups. Coherence measures at between 112 pairs of 19 channels EEG are shown there are abnormalities at connectivity between in right temporal lobe and frontal lobe and connectivity between right temporal lobe with other lobes.","PeriodicalId":22356,"journal":{"name":"Tenth International Conference on Computer Modeling and Simulation (uksim 2008)","volume":"205 1","pages":"76-81"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75473440","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 present paper proposes and models a four-position unbalanced valve that was introduced by the author in 2006 [1] in a hydraulic system used to save and recover braking power. The valve modulates the oil flow from a free-wheeling mode to braking-and-storing energy, to full braking, to recovering energy and accelerating a load. The valve design achieves this by combining the operating characteristics of the sliding and the rotary operation. The key goals of the present analysis are to demonstrate that the four-position operation is attainable, and to evaluate the valve stability during the transient and the steady state modes of operation and compare it with the stability of the conventional stepped-spool valves. The normal, freewheeling position of the valve is determined by locating its spool in between the two springs of unequal stiffness, thus making it “unbalanced”. The solid model of the proposed design is presented and analysed here.
{"title":"Model of a Four-Position Unbalanced Hydraulic Valve","authors":"S. Andic","doi":"10.1109/UKSIM.2008.103","DOIUrl":"https://doi.org/10.1109/UKSIM.2008.103","url":null,"abstract":"The present paper proposes and models a four-position unbalanced valve that was introduced by the author in 2006 [1] in a hydraulic system used to save and recover braking power. The valve modulates the oil flow from a free-wheeling mode to braking-and-storing energy, to full braking, to recovering energy and accelerating a load. The valve design achieves this by combining the operating characteristics of the sliding and the rotary operation. The key goals of the present analysis are to demonstrate that the four-position operation is attainable, and to evaluate the valve stability during the transient and the steady state modes of operation and compare it with the stability of the conventional stepped-spool valves. The normal, freewheeling position of the valve is determined by locating its spool in between the two springs of unequal stiffness, thus making it “unbalanced”. The solid model of the proposed design is presented and analysed here.","PeriodicalId":22356,"journal":{"name":"Tenth International Conference on Computer Modeling and Simulation (uksim 2008)","volume":"46 1","pages":"58-63"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75024086","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}
Uncovering the dynamic behavior of biochemical networks is one of the systems' biology's tasks. These systems are very complicated systems, containing many interacting components. Recently, researchers have tested computational tools to model these systems in order to elucidate the organizational principles. In this paper we recommend using Holonic Multiagent systems for biological networks simulation. Holonical systems guarantee to provide a recursive and hierarchical modeling for complex systems with dynamic and runtime reorganization. They are adopted for simulation where systems have a hierarchical structure and can be decomposed into individual cooperating entities.
{"title":"Biological Network Simulation Using Holonic Multiagent Systems","authors":"S. Shafaei, N. Ghasem-Aghaee","doi":"10.1109/UKSIM.2008.23","DOIUrl":"https://doi.org/10.1109/UKSIM.2008.23","url":null,"abstract":"Uncovering the dynamic behavior of biochemical networks is one of the systems' biology's tasks. These systems are very complicated systems, containing many interacting components. Recently, researchers have tested computational tools to model these systems in order to elucidate the organizational principles. In this paper we recommend using Holonic Multiagent systems for biological networks simulation. Holonical systems guarantee to provide a recursive and hierarchical modeling for complex systems with dynamic and runtime reorganization. They are adopted for simulation where systems have a hierarchical structure and can be decomposed into individual cooperating entities.","PeriodicalId":22356,"journal":{"name":"Tenth International Conference on Computer Modeling and Simulation (uksim 2008)","volume":"43 1","pages":"617-622"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77654018","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 simulation modeling for redesigning health service centers at a medical consultation corporation Ltd. Research was performed in an effort to improve health service, in particular to reduce average waiting times as well as their variability. Discrete-event simulation modeling provided valuable input into new facility design decisions and showed the efficacy of pooling sources of variation, particularly patient demand and service times. Initial performance of the redesigned facilities was positive; however, dynamic feedback within the system of service centers eventually resulted in unanticipated performance problems. System dynamics models were developed to help predict these implementation problems and suggest some ways to improve results.
{"title":"Modeling Health Service Centers with Simulation and System Dynamics","authors":"Ying Su, Zhanming Jin","doi":"10.1109/UKSIM.2008.37","DOIUrl":"https://doi.org/10.1109/UKSIM.2008.37","url":null,"abstract":"This paper describes the simulation modeling for redesigning health service centers at a medical consultation corporation Ltd. Research was performed in an effort to improve health service, in particular to reduce average waiting times as well as their variability. Discrete-event simulation modeling provided valuable input into new facility design decisions and showed the efficacy of pooling sources of variation, particularly patient demand and service times. Initial performance of the redesigned facilities was positive; however, dynamic feedback within the system of service centers eventually resulted in unanticipated performance problems. System dynamics models were developed to help predict these implementation problems and suggest some ways to improve results.","PeriodicalId":22356,"journal":{"name":"Tenth International Conference on Computer Modeling and Simulation (uksim 2008)","volume":"39 1","pages":"649-654"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79178622","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 dynamic response of the gun during the firing cycle and the relative motion of the projectile with respect to the barrel has a significant effect on the accuracy and consistency of the gun as well as the shot launch conditions. Computer modelling techniques can be used to simulate motion of the gun during the firing cycle. A three dimensional finite element model of a large calibre gun was developed using ANSYS commercial software and its motion during the firing cycle was simulated to study and predict the effects of various design factors on the dynamic response of the gun. Physical contact conditions of the gun system components have been modelled using contact technology in ANSYS. Results are compared with general responses of the gun system obtained through available docummented sources. Effectiveness of the software for accurate modelling of gun dynamics is discussed.
{"title":"Finite Element Modelling and Simulation of Gun Dynamics Using \"ANSYS\"","authors":"Nadeem Ahmed, Rod D. Brown, A. Hameed","doi":"10.1109/UKSIM.2008.22","DOIUrl":"https://doi.org/10.1109/UKSIM.2008.22","url":null,"abstract":"The dynamic response of the gun during the firing cycle and the relative motion of the projectile with respect to the barrel has a significant effect on the accuracy and consistency of the gun as well as the shot launch conditions. Computer modelling techniques can be used to simulate motion of the gun during the firing cycle. A three dimensional finite element model of a large calibre gun was developed using ANSYS commercial software and its motion during the firing cycle was simulated to study and predict the effects of various design factors on the dynamic response of the gun. Physical contact conditions of the gun system components have been modelled using contact technology in ANSYS. Results are compared with general responses of the gun system obtained through available docummented sources. Effectiveness of the software for accurate modelling of gun dynamics is discussed.","PeriodicalId":22356,"journal":{"name":"Tenth International Conference on Computer Modeling and Simulation (uksim 2008)","volume":"96 1","pages":"18-22"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80332373","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 an automatic design environment based on simulation and evolution that has been tailored to be suitable for aerodynamic and hydrodynamic engineering design. Discussions of its application to various case studies are presented.
{"title":"Automatic Aerodynamic and hydrodynamic Design Based on Simulation and Evolution","authors":"F. López-Peña, V. Casás, R. Duro","doi":"10.1109/UKSIM.2008.121","DOIUrl":"https://doi.org/10.1109/UKSIM.2008.121","url":null,"abstract":"This paper describes an automatic design environment based on simulation and evolution that has been tailored to be suitable for aerodynamic and hydrodynamic engineering design. Discussions of its application to various case studies are presented.","PeriodicalId":22356,"journal":{"name":"Tenth International Conference on Computer Modeling and Simulation (uksim 2008)","volume":"33 1","pages":"7-13"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77196634","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}
Two types of oscillators suitable for modeling the growth rate adaptation of biomass production process to circadian influences are presented and compared. These oscillators are forced by cyclic inputs representing basically the diurnal cycles corresponding to the periodical changes of light and dark phases and adapt their own natural circadian rhythm to them. This adaptation is referred to as entrainment and the oscillators considered for this circadian rhythm entrainment are based on Van der Pol and Lorenz type models. The Van der Pol type oscillator is proposed in a matrix form and subsequently compared with a generalized Lorenz model. The proposed oscillators are linked to a delayed Volterra model and the generic structure is applied to the case of cyanobacteria population growth. Using data recently obtained from the measurements on a laboratory-scale photobioreactor the parameters of oscillators are tuned to fit measured excited growth responses of cyanobacteria concentration.
{"title":"Oscillators for Modeling Biomass Growth Adaptation to Circadian Rhythms","authors":"Jaromír Fišer, P. Zítek, J. Červený","doi":"10.1109/UKSIM.2008.58","DOIUrl":"https://doi.org/10.1109/UKSIM.2008.58","url":null,"abstract":"Two types of oscillators suitable for modeling the growth rate adaptation of biomass production process to circadian influences are presented and compared. These oscillators are forced by cyclic inputs representing basically the diurnal cycles corresponding to the periodical changes of light and dark phases and adapt their own natural circadian rhythm to them. This adaptation is referred to as entrainment and the oscillators considered for this circadian rhythm entrainment are based on Van der Pol and Lorenz type models. The Van der Pol type oscillator is proposed in a matrix form and subsequently compared with a generalized Lorenz model. The proposed oscillators are linked to a delayed Volterra model and the generic structure is applied to the case of cyanobacteria population growth. Using data recently obtained from the measurements on a laboratory-scale photobioreactor the parameters of oscillators are tuned to fit measured excited growth responses of cyanobacteria concentration.","PeriodicalId":22356,"journal":{"name":"Tenth International Conference on Computer Modeling and Simulation (uksim 2008)","volume":"22 1","pages":"175-179"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82583800","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}
Purpose of simulations is mostly to prove correctness of system behavior by execution of a simulation model. Here we bring an approach how the simulation can be useful in the process of realization of systems with intelligent sensor nodes. To make models of these systems we adapted idea of distributed multi-agent system with particular demands that overcomes ordinary multi-agent systems. The work is focused onto mobility, agent size and interoperability. We bring experiences with implementation of agents for sensors with programmable ATMEL microcontrollers and usage of simulation in the process of realization of this type of networks.
{"title":"Simulation for Wireless Sensor Networks with Intelligent Nodes","authors":"F. Zboril, F. Zboril","doi":"10.1109/UKSIM.2008.56","DOIUrl":"https://doi.org/10.1109/UKSIM.2008.56","url":null,"abstract":"Purpose of simulations is mostly to prove correctness of system behavior by execution of a simulation model. Here we bring an approach how the simulation can be useful in the process of realization of systems with intelligent sensor nodes. To make models of these systems we adapted idea of distributed multi-agent system with particular demands that overcomes ordinary multi-agent systems. The work is focused onto mobility, agent size and interoperability. We bring experiences with implementation of agents for sensors with programmable ATMEL microcontrollers and usage of simulation in the process of realization of this type of networks.","PeriodicalId":22356,"journal":{"name":"Tenth International Conference on Computer Modeling and Simulation (uksim 2008)","volume":"1 1","pages":"746-751"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87917506","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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