We propose an end-to-end congestion control and bandwidth estimation algorithm for ABR traffic in high-speed ATM networks. The congestion control algorithm is derived using the Smith predictor and uses an estimation of the bottleneck queue level as feedback. The estimation allows the algorithm to be executed at the entry node of a high-speed ATM network without requiring any explicit feedback from the network switches.
{"title":"End-to-end congestion control and bandwidth estimation in high speed ATM networks","authors":"S. Mascolo, E. Di Sciascio, A. Grieco","doi":"10.1109/ITI.2001.937997","DOIUrl":"https://doi.org/10.1109/ITI.2001.937997","url":null,"abstract":"We propose an end-to-end congestion control and bandwidth estimation algorithm for ABR traffic in high-speed ATM networks. The congestion control algorithm is derived using the Smith predictor and uses an estimation of the bottleneck queue level as feedback. The estimation allows the algorithm to be executed at the entry node of a high-speed ATM network without requiring any explicit feedback from the network switches.","PeriodicalId":375405,"journal":{"name":"Proceedings of the 23rd International Conference on Information Technology Interfaces, 2001. ITI 2001.","volume":"06 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131349730","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}
M.M. Kolodnytsky, A.M. Koivalchuk, S.V. Kuryata, V. Levitsky
The article shows how to solve some computational problems in finite group theory using the software system "DSR Open Lab 1.0" designed and developed by authors. We consider such computational problems as follows: the construction of the group using given elements or a genetic code (generators and relations), the operations with the group elements as well as the calculations of subgroups and their powers, normal subgroup, factor-group, etc. We also give a comparison of the user interface implementation of our software with Maple V Release 5. The presented examples show that the process of problem solving and teaching in finite group theory has become easier and more interactive now, due to the visual user interface of the presented software.
本文介绍了如何利用作者设计开发的软件系统“DSR开放实验室1.0”解决有限群论中的一些计算问题。我们考虑这样的计算问题:使用给定元素或遗传密码(生成器和关系)构造群，与群元素的运算以及子群及其幂、正规子群、因子群等的计算。我们还将本软件的用户界面实现与Maple V Release 5进行了比较。实例表明，由于所提供的软件具有可视化的用户界面，有限群论的解题和教学过程变得更加容易和更具交互性。
{"title":"Interactive visual software system for problem solving and teaching in finite group theory","authors":"M.M. Kolodnytsky, A.M. Koivalchuk, S.V. Kuryata, V. Levitsky","doi":"10.1109/ITI.2001.938049","DOIUrl":"https://doi.org/10.1109/ITI.2001.938049","url":null,"abstract":"The article shows how to solve some computational problems in finite group theory using the software system \"DSR Open Lab 1.0\" designed and developed by authors. We consider such computational problems as follows: the construction of the group using given elements or a genetic code (generators and relations), the operations with the group elements as well as the calculations of subgroups and their powers, normal subgroup, factor-group, etc. We also give a comparison of the user interface implementation of our software with Maple V Release 5. The presented examples show that the process of problem solving and teaching in finite group theory has become easier and more interactive now, due to the visual user interface of the presented software.","PeriodicalId":375405,"journal":{"name":"Proceedings of the 23rd International Conference on Information Technology Interfaces, 2001. ITI 2001.","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132481242","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}
A sample of 7000+ students was analyzed by the University Computing Centre (SRCE) staff to evaluate course satisfaction, teacher performance, and changing course demands. Findings indicated adequate overall performance, and changing course content needs over a four year time period. The major conclusion of the Project (SOCRATES) is that the software product developed during the research can become an economical and useful tool in helping to shape administrator efforts and decisions regarding the allocation of scarce organizational resources and in the development of new course offers at SRCE.
{"title":"Measuring and monitoring movements in course interest at the University Computing Centre: a statistical platform for quality improvement and new course deployment decisions","authors":"V. Luzar-Stiffler, M. Milinovic, C. Stiffler","doi":"10.1109/ITI.2001.938025","DOIUrl":"https://doi.org/10.1109/ITI.2001.938025","url":null,"abstract":"A sample of 7000+ students was analyzed by the University Computing Centre (SRCE) staff to evaluate course satisfaction, teacher performance, and changing course demands. Findings indicated adequate overall performance, and changing course content needs over a four year time period. The major conclusion of the Project (SOCRATES) is that the software product developed during the research can become an economical and useful tool in helping to shape administrator efforts and decisions regarding the allocation of scarce organizational resources and in the development of new course offers at SRCE.","PeriodicalId":375405,"journal":{"name":"Proceedings of the 23rd International Conference on Information Technology Interfaces, 2001. ITI 2001.","volume":"234 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130156385","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 article presents measurement data of the municipal heating process. A definition of process target function with respect to total heating comfort by information synthesis is given. Modeling of the target function by means of a circular explicit AI tool is described. A decision on meaningful models by the consistency of the physical set-up is discussed.
{"title":"Predictive model of the distributed heating","authors":"F. Jovic, V. Rajkovič, Z. Jagnjic, D. Vuksanovic","doi":"10.1109/ITI.2001.938037","DOIUrl":"https://doi.org/10.1109/ITI.2001.938037","url":null,"abstract":"The article presents measurement data of the municipal heating process. A definition of process target function with respect to total heating comfort by information synthesis is given. Modeling of the target function by means of a circular explicit AI tool is described. A decision on meaningful models by the consistency of the physical set-up is discussed.","PeriodicalId":375405,"journal":{"name":"Proceedings of the 23rd International Conference on Information Technology Interfaces, 2001. ITI 2001.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133051960","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 aim of this paper is to emphasise the importance of the calculation of price indices in external trade of the Republic of Croatia. In the Croatian Central Bureau of Statistics these indices are calculated by the "unit value" method, also described in the paper. Unit value indices are used for measuring price changes in the Croatian external trade, for calculating volume indices and terms of trade, and for deflating value indicators in the system of national accounts.
{"title":"Price indices in external trade of the Republic of Croatia","authors":"A. Jávor","doi":"10.1109/ITI.2001.938023","DOIUrl":"https://doi.org/10.1109/ITI.2001.938023","url":null,"abstract":"The aim of this paper is to emphasise the importance of the calculation of price indices in external trade of the Republic of Croatia. In the Croatian Central Bureau of Statistics these indices are calculated by the \"unit value\" method, also described in the paper. Unit value indices are used for measuring price changes in the Croatian external trade, for calculating volume indices and terms of trade, and for deflating value indicators in the system of national accounts.","PeriodicalId":375405,"journal":{"name":"Proceedings of the 23rd International Conference on Information Technology Interfaces, 2001. ITI 2001.","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134579376","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 article studies the purely viscous stationary flow of quasi-Newtonian fluids which share dependent viscosity, obeying the power law and Carreau's law. We prove the existence of the solution using the method of monotonicity. Finally, we study numerical algorithms which are useful for the practical solution of the discretized equation.
{"title":"Stationary Stokes system for quasi-Newtonian fluids","authors":"Ana Vukelid","doi":"10.1109/ITI.2001.938052","DOIUrl":"https://doi.org/10.1109/ITI.2001.938052","url":null,"abstract":"The article studies the purely viscous stationary flow of quasi-Newtonian fluids which share dependent viscosity, obeying the power law and Carreau's law. We prove the existence of the solution using the method of monotonicity. Finally, we study numerical algorithms which are useful for the practical solution of the discretized equation.","PeriodicalId":375405,"journal":{"name":"Proceedings of the 23rd International Conference on Information Technology Interfaces, 2001. ITI 2001.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134115737","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 abolishment of conventional structures and the reduction of control have made it possible for colleagues and teams to be aware of their responsibility independently. Therefore, managers can spend more time supporting the employees. Process teams do not need a boss, but a coach who gives advice, who does not take part in the game but who knows the rules and who is always available. The new manager prepares the way for his colleagues and creates the necessary surroundings. It is about being capable to get along well with people and to be proud of the achievement of others e.g. (Hammer, 1994). The paper discusses business re-engineering and customer satisfaction.
{"title":"From supervisor to coach","authors":"T. Benesch","doi":"10.1109/ITI.2001.938005","DOIUrl":"https://doi.org/10.1109/ITI.2001.938005","url":null,"abstract":"The abolishment of conventional structures and the reduction of control have made it possible for colleagues and teams to be aware of their responsibility independently. Therefore, managers can spend more time supporting the employees. Process teams do not need a boss, but a coach who gives advice, who does not take part in the game but who knows the rules and who is always available. The new manager prepares the way for his colleagues and creates the necessary surroundings. It is about being capable to get along well with people and to be proud of the achievement of others e.g. (Hammer, 1994). The paper discusses business re-engineering and customer satisfaction.","PeriodicalId":375405,"journal":{"name":"Proceedings of the 23rd International Conference on Information Technology Interfaces, 2001. ITI 2001.","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124235471","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}
A. Dimitrova, T. Georgiev, A. Ratkov, V. Ivanova, J. Kristeva, B. Ratkov, A. Mantchev
Dynamic experimental data of sorption and desorption phase of L-lysine ion-exchange purification process are investigated. The behaviour of the experimental data is described through non-linear dynamic mathematical models, taking into account the relationship between L-lysine concentration and pH of the culture broth, temperature, flow rate, etc. The adequacy of the proposed time series models is confirmed by simulation research.
{"title":"Modelling of L-lysine purification process","authors":"A. Dimitrova, T. Georgiev, A. Ratkov, V. Ivanova, J. Kristeva, B. Ratkov, A. Mantchev","doi":"10.1109/ITI.2001.938036","DOIUrl":"https://doi.org/10.1109/ITI.2001.938036","url":null,"abstract":"Dynamic experimental data of sorption and desorption phase of L-lysine ion-exchange purification process are investigated. The behaviour of the experimental data is described through non-linear dynamic mathematical models, taking into account the relationship between L-lysine concentration and pH of the culture broth, temperature, flow rate, etc. The adequacy of the proposed time series models is confirmed by simulation research.","PeriodicalId":375405,"journal":{"name":"Proceedings of the 23rd International Conference on Information Technology Interfaces, 2001. ITI 2001.","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130283659","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}
K. Sanjeevan, J. Cruellas, A. Canals, T. Millan, D. Chiorean, M. Mullet, M. Robert
UML (Unified Modelling Language) defines a standard notation for object-oriented systems. It is now the de-facto standard graphical language for specifying, constructing, visualising and documenting software-intensive systems. Some extensions to the original standard have also been proposed and implemented for business modelling. NEPTUNE (Nice Environment with a Process and Tools Using Norms and Examples) is a European Commission-funded project under the IST (Information Society Technologies) programme. A significant innovation in this project is the incorporation of the use of UML in contexts other than software engineering (viz. in business process modelling and knowledge engineering). Additionally, the validation tools that we are developing check for coherency between UML diagrams (for each working context) - something that is not available in other tools. Customised document generation is another powerful functionality.
{"title":"NEPTUNE - an integrated UML toolset and methodology","authors":"K. Sanjeevan, J. Cruellas, A. Canals, T. Millan, D. Chiorean, M. Mullet, M. Robert","doi":"10.1109/ITI.2001.938063","DOIUrl":"https://doi.org/10.1109/ITI.2001.938063","url":null,"abstract":"UML (Unified Modelling Language) defines a standard notation for object-oriented systems. It is now the de-facto standard graphical language for specifying, constructing, visualising and documenting software-intensive systems. Some extensions to the original standard have also been proposed and implemented for business modelling. NEPTUNE (Nice Environment with a Process and Tools Using Norms and Examples) is a European Commission-funded project under the IST (Information Society Technologies) programme. A significant innovation in this project is the incorporation of the use of UML in contexts other than software engineering (viz. in business process modelling and knowledge engineering). Additionally, the validation tools that we are developing check for coherency between UML diagrams (for each working context) - something that is not available in other tools. Customised document generation is another powerful functionality.","PeriodicalId":375405,"journal":{"name":"Proceedings of the 23rd International Conference on Information Technology Interfaces, 2001. ITI 2001.","volume":"185 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125671878","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 presents a neural network based model for forecasting gas consumption for residential and commercial consumers. A feedforward neural network with sigmoid nodes and one hidden layer was trained by backpropagation. The model was validated on real data from a distribution area covering 7% of the total consumption in Croatia, consisting mostly of residential and commercial consumers.
{"title":"Short term hourly forecasting of gas consumption using neural networks","authors":"D. Peharda, M. Delimar, S. Lončarić","doi":"10.1109/ITI.2001.938043","DOIUrl":"https://doi.org/10.1109/ITI.2001.938043","url":null,"abstract":"This paper presents a neural network based model for forecasting gas consumption for residential and commercial consumers. A feedforward neural network with sigmoid nodes and one hidden layer was trained by backpropagation. The model was validated on real data from a distribution area covering 7% of the total consumption in Croatia, consisting mostly of residential and commercial consumers.","PeriodicalId":375405,"journal":{"name":"Proceedings of the 23rd International Conference on Information Technology Interfaces, 2001. ITI 2001.","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127115465","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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