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Proceedings. 13th International Workshop on Database and Expert Systems Applications最新文献

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An agent based mobile phone groupware system using location information 一种基于agent的基于位置信息的手机群件系统
Proceedings. 13th International Workshop on Database and Expert Systems Applications Pub Date : 2002-09-02 DOI: 10.1109/DEXA.2002.1045873
A. Koyama, L. Barolli, Shinjirou Takami, N. Kamibayashi, N. Shiratori
{"title":"An agent based mobile phone groupware system using location information","authors":"A. Koyama, L. Barolli, Shinjirou Takami, N. Kamibayashi, N. Shiratori","doi":"10.1109/DEXA.2002.1045873","DOIUrl":"https://doi.org/10.1109/DEXA.2002.1045873","url":null,"abstract":"Many groupware systems have been used for communication between personal computers (PCs) in companies. However, the demand for groupware systems is growing. Cue to the spread of mobile phone users and systems, new mobile phone groupware systems are needed. In groupware systems, the location information function which is used to find the location of group members is a very important function for smoothing group activities. In this paper, we propose a mobile phone groupware system using location information function. By resolving problems of the location information function of the Devora system, we improve the performance of the proposed mobile phone groupware system. The evaluation results show that our system operates smoothly and the communication cost is decreased.","PeriodicalId":254550,"journal":{"name":"Proceedings. 13th International Workshop on Database and Expert Systems Applications","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131719030","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}
引用次数: 2
Supporting self-facilitation in distributed group decisions 支持分布式群体决策中的自我促进
Proceedings. 13th International Workshop on Database and Expert Systems Applications Pub Date : 2002-09-02 DOI: 10.1109/DEXA.2002.1045917
C. Zamfirescu, F. Filip
{"title":"Supporting self-facilitation in distributed group decisions","authors":"C. Zamfirescu, F. Filip","doi":"10.1109/DEXA.2002.1045917","DOIUrl":"https://doi.org/10.1109/DEXA.2002.1045917","url":null,"abstract":"The paper addresses the problem of supporting self-facilitation of distributed autonomous groups of decision-makers from an agent-oriented perspective. In contrast to monolithic designs based on functional decomposition, it is argued that an agent-oriented approach is the appropriate means to provide better support for group meetings. The focus is on distributed and asynchronous meetings, detailing the conceptual modelling aspects of an implemented agent-based GDSS which exhibits an emergent functionality able to support in an effective way the dynamics of the group decision process.","PeriodicalId":254550,"journal":{"name":"Proceedings. 13th International Workshop on Database and Expert Systems Applications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122320024","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}
引用次数: 5
FINDER: a mediator system for structured and semi-structured data integration FINDER:用于结构化和半结构化数据集成的中介系统
Proceedings. 13th International Workshop on Database and Expert Systems Applications Pub Date : 2002-09-02 DOI: 10.1109/DEXA.2002.1046002
M. Álvarez, A. Pan, J. Raposo, Fidel Cacheda, Á. Viña
{"title":"FINDER: a mediator system for structured and semi-structured data integration","authors":"M. Álvarez, A. Pan, J. Raposo, Fidel Cacheda, Á. Viña","doi":"10.1109/DEXA.2002.1046002","DOIUrl":"https://doi.org/10.1109/DEXA.2002.1046002","url":null,"abstract":"Mediator systems aim to provide a unified vision over heterogeneous, distributed, structured and semi-structured data sources. We present FINDER, a mediator system which has been used for building several real-world data integration applications, both in the Internet and intranet domains. In this paper we provide an overview of the system and remark upon some of its distinctive features.","PeriodicalId":254550,"journal":{"name":"Proceedings. 13th International Workshop on Database and Expert Systems Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129864931","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}
引用次数: 21
Automating negotiation over B2B processes 自动化B2B流程上的协商
Proceedings. 13th International Workshop on Database and Expert Systems Applications Pub Date : 2002-09-02 DOI: 10.1109/DEXA.2002.1045973
A. Byde, G. Piccinelli, W. Lamersdorf
{"title":"Automating negotiation over B2B processes","authors":"A. Byde, G. Piccinelli, W. Lamersdorf","doi":"10.1109/DEXA.2002.1045973","DOIUrl":"https://doi.org/10.1109/DEXA.2002.1045973","url":null,"abstract":"Business processes underpin the operations of every company. The procedural logic behind business activities is fundamental for effective and efficient management of resources. Effective coordination translates into better quality for products and services. Efficient management translates into cost reduction. In highly competitive environments, quality and cost constitute key competitive advantages for companies. Moving from the company to the supply chain, processes become even more important. Companies have access to internal resources beyond those specified in internal processes. Still, companies have access to other companies only in accordance with and within the scope of the interaction processes agreed in contracts. Interaction processes directly impact internal operations, and have direct cost implications. Hence, interaction processes are central to the negotiation of B2B relationships. In this paper, we present a framework for the automatic negotiation of business interaction processes. The main component of the framework is a technique for the automatic reconciliation of process proposals. Elements of the framework have been embedded in a prototype, which is also presented.","PeriodicalId":254550,"journal":{"name":"Proceedings. 13th International Workshop on Database and Expert Systems Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129480670","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}
引用次数: 8
Active data warehousing: a new breed of decision support 主动数据仓库:一种新的决策支持
Proceedings. 13th International Workshop on Database and Expert Systems Applications Pub Date : 2002-09-02 DOI: 10.1109/DEXA.2002.1045990
S. Brobst
{"title":"Active data warehousing: a new breed of decision support","authors":"S. Brobst","doi":"10.1109/DEXA.2002.1045990","DOIUrl":"https://doi.org/10.1109/DEXA.2002.1045990","url":null,"abstract":"Summary form only given. Active data warehousing is rapidly changing the landscape for deployment of decision support solutions. The trend toward actionable business intelligence demands that capabilities for tactical and event-driven decision-making be supported in addition to traditional uses of the data warehouse for strategic decision-making. The resulting challenges to deliver extreme service levels in the areas of performance, availability, and data freshness require new methods for data warehouse construction. In this paper, the architectural requirements for an active data warehouse are described in detail. The evolutionary steps from first generation data warehouse implementations to active data warehouse deployment are provided as a means for incrementally delivering business value in the path toward advanced decision support capability. The service level requirements and technical building blocks for an active data warehouse deployment are described using specific examples. We explore the design tradeoffs and implementation techniques for active data warehouse deployment. Particular attention is paid to architectural topologies for successful implementation and the role of frameworks for enterprise application integration (EAI). Implementation of scalable solutions with capability for near real-time data acquisition and mixed workload management with aggressive service levels are discussed with real customer scenarios as mini case study examples.","PeriodicalId":254550,"journal":{"name":"Proceedings. 13th International Workshop on Database and Expert Systems Applications","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114880903","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}
引用次数: 9
A genetic algorithm based routing method using two QoS parameters 一种使用两个QoS参数的基于遗传算法的路由方法
Proceedings. 13th International Workshop on Database and Expert Systems Applications Pub Date : 2002-09-02 DOI: 10.1109/DEXA.2002.1045868
L. Barolli, A. Koyama, Kazunori Matsumoto, T. Suganuma, N. Shiratori
{"title":"A genetic algorithm based routing method using two QoS parameters","authors":"L. Barolli, A. Koyama, Kazunori Matsumoto, T. Suganuma, N. Shiratori","doi":"10.1109/DEXA.2002.1045868","DOIUrl":"https://doi.org/10.1109/DEXA.2002.1045868","url":null,"abstract":"In order to support multimedia communication over high speed networks, it is necessary to develop routing algorithms which use more than one QoS parameter. This is because new services such as video on demand and remote meeting systems require better QoS. However, the problem of QoS routing is difficult and to find a feasible route with two independent path constraints is NP-complete. Therefore, QoS routing algorithms for high speed networks must be adaptive, flexible, and intelligent for efficient network management. In this paper, we propose a QoS routing method based on a genetic algorithm (GA). The proposed method uses two QoS parameters for routing. The simulation results show that proposed method has a better performance than a routing algorithm with only one QoS parameter and a conventional method.","PeriodicalId":254550,"journal":{"name":"Proceedings. 13th International Workshop on Database and Expert Systems Applications","volume":"366 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132730266","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}
引用次数: 25
Linking the Semantic Web with existing sources 将语义网与现有源链接起来
Proceedings. 13th International Workshop on Database and Expert Systems Applications Pub Date : 2002-09-02 DOI: 10.1109/DEXA.2002.1045882
Wolfgang May
{"title":"Linking the Semantic Web with existing sources","authors":"Wolfgang May","doi":"10.1109/DEXA.2002.1045882","DOIUrl":"https://doi.org/10.1109/DEXA.2002.1045882","url":null,"abstract":"The Semantic Web aims at providing Web data sources on a semantic level. On the other hand, most of the Web data itself is not suitably prepared (e.g., by annotations). In this paper, we describe a semantic layer that integrates existing data sources with the Semantic Web by combining semantic modeling with links that associate the semantic notions with actual data on the Web. The semantic level consists of specialized service providers - which can be seen as agents - for each application domain. Each agent contains ontological knowledge represented in XML where the links to the actual data are embedded as XPath expressions, similar to XLink. The agent uses its knowledge with an internal reasoning mechanism to combine the links for translating a Semantic Web query into a Web query that is then evaluated against the individual sources.","PeriodicalId":254550,"journal":{"name":"Proceedings. 13th International Workshop on Database and Expert Systems Applications","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127408986","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}
引用次数: 2
Evaluation of certificate revocation policies: OCSP vs. Overissued-CRL 证书撤销策略的评估:OCSP与过度颁发的crl
Proceedings. 13th International Workshop on Database and Expert Systems Applications Pub Date : 2002-09-02 DOI: 10.1109/DEXA.2002.1045949
J. L. Muñoz, J. Forné, J. C. Castro
{"title":"Evaluation of certificate revocation policies: OCSP vs. Overissued-CRL","authors":"J. L. Muñoz, J. Forné, J. C. Castro","doi":"10.1109/DEXA.2002.1045949","DOIUrl":"https://doi.org/10.1109/DEXA.2002.1045949","url":null,"abstract":"Public key cryptography is widely used to provide Internet security services. PKI is the infrastructure that supports public key cryptography and revocation of certificates implies one of its major costs. In this paper we propose a model to compare revocation policies and use it to compare the main revocation policies: OCSP and Overissued-CRL.","PeriodicalId":254550,"journal":{"name":"Proceedings. 13th International Workshop on Database and Expert Systems Applications","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128200793","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}
引用次数: 23
Integrating heterogeneous data sources with XML and XQuery 用XML和XQuery集成异构数据源
Proceedings. 13th International Workshop on Database and Expert Systems Applications Pub Date : 2002-09-02 DOI: 10.1109/DEXA.2002.1046001
G. Gardarin, A. Mensch, Tuyet-Tram Dang-Ngoc, L. Smit
{"title":"Integrating heterogeneous data sources with XML and XQuery","authors":"G. Gardarin, A. Mensch, Tuyet-Tram Dang-Ngoc, L. Smit","doi":"10.1109/DEXA.2002.1046001","DOIUrl":"https://doi.org/10.1109/DEXA.2002.1046001","url":null,"abstract":"XML has emerged as the leading language for representing and exchanging data not only on the Web, but also in general in the enterprise. XQuery is emerging as the standard query language for XML. Thus, tools are required to mediate between XML queries and heterogeneous data sources to integrate data in XML. This paper presents the e-XMLMedia mediator, a unique tool for integrating and querying disparate heterogeneous information as unified XML views. It describes the mediator architecture and focuses on the unique distributed query processing technology implemented in this component. Further, we evoke the various applications that are currently being experimented with the e-XMLMedia Mediator.","PeriodicalId":254550,"journal":{"name":"Proceedings. 13th International Workshop on Database and Expert Systems Applications","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114613581","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}
引用次数: 32
Understanding the behavior of the conflict-rate metric in optimistic peer replication 了解乐观对等复制中冲突率度量的行为
Proceedings. 13th International Workshop on Database and Expert Systems Applications Pub Date : 2002-09-02 DOI: 10.1109/DEXA.2002.1045989
An-I Wang, P. Reiher, R. Bagrodia, G. Kuenning
{"title":"Understanding the behavior of the conflict-rate metric in optimistic peer replication","authors":"An-I Wang, P. Reiher, R. Bagrodia, G. Kuenning","doi":"10.1109/DEXA.2002.1045989","DOIUrl":"https://doi.org/10.1109/DEXA.2002.1045989","url":null,"abstract":"Optimistic replication of data is a widely used tool for mobile environments, but the behavior of concurrent conflicting updates caused by the relaxed consistency model is poorly understood. Through analytical modeling, we derive an exact bound for conflict rates for the common case of two replicas. The shape of the two-replica analytic curve matches well with simulation results at 50 replicas. Our result shows that (1) both frequently and infrequently synchronized mobile machines operate in the low regions of the conflict-rate curve; (2) conflict rate is not well suited for comparing systems, since multiple system settings can result in the same conflict rate number; and (3) the conflict rate is highly dependent on the characteristics of data flow paths.","PeriodicalId":254550,"journal":{"name":"Proceedings. 13th International Workshop on Database and Expert Systems Applications","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122102470","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}
引用次数: 14
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