Pub Date : 2004-05-12DOI: 10.1109/MELCON.2004.1347023
D. Mikic, Lea Skorin-Kapov, O. Dobrijevic, Petra Schilhard, Ericsson Nikola Tesla, Croatia Dario. Mikic
Enhanced and interactive visualization techniques are the key issues in improving the ability of users to comprehend and work with the large data sets. Various techniques have been used in the past incorporating different media and are applied to a wide range of application domains. In particular, 3D data representation often provides a more enhanced and intuitive user approach than the two dimensional approach. In this paper, we discuss several data visualization techniques with an emphasis on hierarchical data structures. We present a case study involving the implementation of a Web based application enabling the 3D visual access to grid network monitoring data. Geographically distributed computing nodes are arranged into "farms", which further contains a number of the organizationally distributed "clusters". The implemented visualization incorporates a geographical presentation of farms on a 3D model of the Earth and compares two tree-based techniques for the visualization of hierarchically organized clusters and nodes. We discuss the technology used to implement such an application and the achieved user benefits in terms of an enhanced display.
{"title":"3D visualization of the geographical & organizational structure of the grid","authors":"D. Mikic, Lea Skorin-Kapov, O. Dobrijevic, Petra Schilhard, Ericsson Nikola Tesla, Croatia Dario. Mikic","doi":"10.1109/MELCON.2004.1347023","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1347023","url":null,"abstract":"Enhanced and interactive visualization techniques are the key issues in improving the ability of users to comprehend and work with the large data sets. Various techniques have been used in the past incorporating different media and are applied to a wide range of application domains. In particular, 3D data representation often provides a more enhanced and intuitive user approach than the two dimensional approach. In this paper, we discuss several data visualization techniques with an emphasis on hierarchical data structures. We present a case study involving the implementation of a Web based application enabling the 3D visual access to grid network monitoring data. Geographically distributed computing nodes are arranged into \"farms\", which further contains a number of the organizationally distributed \"clusters\". The implemented visualization incorporates a geographical presentation of farms on a 3D model of the Earth and compares two tree-based techniques for the visualization of hierarchically organized clusters and nodes. We discuss the technology used to implement such an application and the achieved user benefits in terms of an enhanced display.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122252167","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 : 2004-05-12DOI: 10.1109/MELCON.2004.1346992
M. Pustišek, A. Kos, J. Bester
Performance in packet switch with arbitrary buffer space and the switch size in three different buffer allocation schemes, OQ, VOQ and FPCF, are analyzed. The performance measures are mean and maximum packet delay and packet loss probability. For the analysis ns2, simulation environment is applied, where the VOQ and FPCF nodes are newly implemented. The results show that the node architecture itself determines the relations between size and buffer space on one hand and the node performance on the other. In all the architectures, packet loss probability decreases and mean queuing delay increases with increased buffer size. The switch size has no effect on the performance in OQ and causes slight increase of packet loss probability in FPCF due to its specific classification algorithm. In VOQ, N and B are strongly related because of the separation of total buffer space in N virtual queues and both substantially influence the performance. Changes in packet loss probability related to the switch size in FPCF can be compensated with additional buffer space without influencing the queuing delay. In VOQ, the additional buffer space required is much larger and well-planned buffer allocation is required.
{"title":"Effects of buffer and node size on packet switch performance","authors":"M. Pustišek, A. Kos, J. Bester","doi":"10.1109/MELCON.2004.1346992","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1346992","url":null,"abstract":"Performance in packet switch with arbitrary buffer space and the switch size in three different buffer allocation schemes, OQ, VOQ and FPCF, are analyzed. The performance measures are mean and maximum packet delay and packet loss probability. For the analysis ns2, simulation environment is applied, where the VOQ and FPCF nodes are newly implemented. The results show that the node architecture itself determines the relations between size and buffer space on one hand and the node performance on the other. In all the architectures, packet loss probability decreases and mean queuing delay increases with increased buffer size. The switch size has no effect on the performance in OQ and causes slight increase of packet loss probability in FPCF due to its specific classification algorithm. In VOQ, N and B are strongly related because of the separation of total buffer space in N virtual queues and both substantially influence the performance. Changes in packet loss probability related to the switch size in FPCF can be compensated with additional buffer space without influencing the queuing delay. In VOQ, the additional buffer space required is much larger and well-planned buffer allocation is required.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"284-286 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117045028","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 : 2004-05-12DOI: 10.1109/MELCON.2004.1346847
D. Matko, I. Škrjanc, G. Klančar, M. Lepetic
This paper illustrates versatility of fuzzy control by two applications of fuzzy logic: model based control of nonlinear systems and decision making respectively. In the first application Takagi-Sugeno fuzzy model is used to model a nonlinear plant: the laboratory scale heat exchanger. The model is then used in generalized predictive control. In the second application the fuzzy logic is applied for several tasks in the robot soccer game analysis, such as data filtering and analysis of strategy.
{"title":"Versatility of fuzzy logic","authors":"D. Matko, I. Škrjanc, G. Klančar, M. Lepetic","doi":"10.1109/MELCON.2004.1346847","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1346847","url":null,"abstract":"This paper illustrates versatility of fuzzy control by two applications of fuzzy logic: model based control of nonlinear systems and decision making respectively. In the first application Takagi-Sugeno fuzzy model is used to model a nonlinear plant: the laboratory scale heat exchanger. The model is then used in generalized predictive control. In the second application the fuzzy logic is applied for several tasks in the robot soccer game analysis, such as data filtering and analysis of strategy.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129725664","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 : 2004-05-12DOI: 10.1109/MELCON.2004.1348272
A. Descampe, François-Olivier Devaux
The image compression standard JPEG 2000 proposes a large set of features, useful for today's multimedia applications. Unfortunately, its complexity is greater than older standards. Real-time applications such as digital cinema requires a specific hardware implementation. In this paper, a decoding scheme is proposed with two main characteristics. Firstly, the complete scheme takes place in an FPGA without accessing any external memory, allowing integration in a secured system. Secondly, a customizable level of parallelization allows to satisfy a broad range of constraints, depending on the signal resolution.
{"title":"A flexible, line-based JPEG 2000 decoder for digital cinema","authors":"A. Descampe, François-Olivier Devaux","doi":"10.1109/MELCON.2004.1348272","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1348272","url":null,"abstract":"The image compression standard JPEG 2000 proposes a large set of features, useful for today's multimedia applications. Unfortunately, its complexity is greater than older standards. Real-time applications such as digital cinema requires a specific hardware implementation. In this paper, a decoding scheme is proposed with two main characteristics. Firstly, the complete scheme takes place in an FPGA without accessing any external memory, allowing integration in a secured system. Secondly, a customizable level of parallelization allows to satisfy a broad range of constraints, depending on the signal resolution.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128221361","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 : 2004-05-12DOI: 10.1109/MELCON.2004.1348206
B. Vahidi, A. Ghatrehsamani, S.A. Kashi
The work reported in this paper is EMTP simulation of reactor switching. The simulation has identified the causes of high transient overvoltage, which are produced when switching high voltage shunt reactors.
{"title":"Shunt reactor switching simulation by EMTP","authors":"B. Vahidi, A. Ghatrehsamani, S.A. Kashi","doi":"10.1109/MELCON.2004.1348206","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1348206","url":null,"abstract":"The work reported in this paper is EMTP simulation of reactor switching. The simulation has identified the causes of high transient overvoltage, which are produced when switching high voltage shunt reactors.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128668673","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 : 2004-05-12DOI: 10.1109/MELCON.2004.1348082
D. Peharda, Z. Hebel, M. Delimar
In order to achieve a more secure and economic operation of a power system its state should be known not only in the present but some time ahead. Transmission system operators do not have the same security margins like they had in the past. Most of the tools of security assessment operate on-line and provide valuable input to the system operators. Security assessment uses load flow calculation to provide results. If it could be possible to compute load flow several hours ahead it would also be possible to provide security assessment. In this paper a load flow calculation several hours in the future is discussed so developed and tested on-line methods for security assessment can be utilized.
{"title":"Forecasting data for load flow","authors":"D. Peharda, Z. Hebel, M. Delimar","doi":"10.1109/MELCON.2004.1348082","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1348082","url":null,"abstract":"In order to achieve a more secure and economic operation of a power system its state should be known not only in the present but some time ahead. Transmission system operators do not have the same security margins like they had in the past. Most of the tools of security assessment operate on-line and provide valuable input to the system operators. Security assessment uses load flow calculation to provide results. If it could be possible to compute load flow several hours ahead it would also be possible to provide security assessment. In this paper a load flow calculation several hours in the future is discussed so developed and tested on-line methods for security assessment can be utilized.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130364384","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 : 2004-05-12DOI: 10.1109/MELCON.2004.1347027
E. Sciascio, F. Donini, M. Mongiello, G. Piscitelli
We present the design of a complete Web engine for document search and retrieval, which is based on CTL. We adopt the temporal logic to define the syntax of a structural query to be processed on the graph model of a Web site. The power of our query language relies on its capability to search the text strings that the user requires not only inside one single document but on the whole structure of the site. The system behaves as a search engine that provides the possibility to pose a query of increasing level of complexity. The results of the experiments proved to be selective and precise enough with respect to user expectations.
{"title":"Design and implementation of a Web-search engine based on computation tree logic","authors":"E. Sciascio, F. Donini, M. Mongiello, G. Piscitelli","doi":"10.1109/MELCON.2004.1347027","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1347027","url":null,"abstract":"We present the design of a complete Web engine for document search and retrieval, which is based on CTL. We adopt the temporal logic to define the syntax of a structural query to be processed on the graph model of a Web site. The power of our query language relies on its capability to search the text strings that the user requires not only inside one single document but on the whole structure of the site. The system behaves as a search engine that provides the possibility to pose a query of increasing level of complexity. The results of the experiments proved to be selective and precise enough with respect to user expectations.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130546086","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 : 2004-05-12DOI: 10.1109/MELCON.2004.1346966
I. Barbancho, A. M. Barbancho, L. Tardón, J.T. Emtrambasaguas
A generalization of the conventional decorrelating detector, designed to deal with the multirate Universal Mobile Telecommunications System (UMTS) signal, is presented. First, the multiple access interference (MAI) is characterized taking into account the two-layered UMTS spreading codes. To this end, the elementary cross-correlation is defined. On the basis of this elementary cross-correlation, the equations that describe the UMTS signal matched filter (MF) outputs are derived and the proposed multirate decorrelating detector strategy is explained. This detector, that generalizes the standard single-rate decorrelating detector, outperforms other commonly employed receivers like the minimum mean-square error (MMSE) receiver and the correlation receiver.
{"title":"Multirate decorrelating detector for UMTS","authors":"I. Barbancho, A. M. Barbancho, L. Tardón, J.T. Emtrambasaguas","doi":"10.1109/MELCON.2004.1346966","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1346966","url":null,"abstract":"A generalization of the conventional decorrelating detector, designed to deal with the multirate Universal Mobile Telecommunications System (UMTS) signal, is presented. First, the multiple access interference (MAI) is characterized taking into account the two-layered UMTS spreading codes. To this end, the elementary cross-correlation is defined. On the basis of this elementary cross-correlation, the equations that describe the UMTS signal matched filter (MF) outputs are derived and the proposed multirate decorrelating detector strategy is explained. This detector, that generalizes the standard single-rate decorrelating detector, outperforms other commonly employed receivers like the minimum mean-square error (MMSE) receiver and the correlation receiver.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114235426","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 : 2004-05-12DOI: 10.1109/MELCON.2004.1346898
R. Iwaki, M. Shimoda
The chromatic cell network in primate retina is modeled with the electronic circuit. Each compartment has trans-admittance, CR filters, differential amplifiers and static nonlinear elements or divisive elements. Feed forward and feedback pathways between layers, together with interconnections of the adjacent cells within the same layers, are based on the biologically documented references. The model presented here predicts the well documented temporal responses and center/surround receptive fields of the chromatic neuron network in the primate retinal fovea.
{"title":"Dynamic circuit model of cone pathways from cones to midget ganglion cells in primate retinal fovea","authors":"R. Iwaki, M. Shimoda","doi":"10.1109/MELCON.2004.1346898","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1346898","url":null,"abstract":"The chromatic cell network in primate retina is modeled with the electronic circuit. Each compartment has trans-admittance, CR filters, differential amplifiers and static nonlinear elements or divisive elements. Feed forward and feedback pathways between layers, together with interconnections of the adjacent cells within the same layers, are based on the biologically documented references. The model presented here predicts the well documented temporal responses and center/surround receptive fields of the chromatic neuron network in the primate retinal fovea.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134156537","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 : 2004-05-12DOI: 10.1109/MELCON.2004.1347028
M. Živić, L. Rac, A. Medar, M. Kusek, G. Jezic
The paper deals with the designing process of the distributed web application suitable for remote operations and maintenance within the remote maintenance shell (RMS) environment. All maintenance operations are performed by the mobile agents. The Web application structure and communication between the components are elaborated. The case study on designing a serving component of the distributed Web application for a cinema ticket booking system is included.
{"title":"Designing of a distributed Web application in the remote maintenance shell environment","authors":"M. Živić, L. Rac, A. Medar, M. Kusek, G. Jezic","doi":"10.1109/MELCON.2004.1347028","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1347028","url":null,"abstract":"The paper deals with the designing process of the distributed web application suitable for remote operations and maintenance within the remote maintenance shell (RMS) environment. All maintenance operations are performed by the mobile agents. The Web application structure and communication between the components are elaborated. The case study on designing a serving component of the distributed Web application for a cinema ticket booking system is included.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131534642","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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