发布求助
文献互助 智能选刊 最新文献

Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96最新文献

筛选
英文 中文
A comparative study of temporal DBMS architectures 时态DBMS体系结构的比较研究
Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96 Pub Date : 1996-09-09 DOI: 10.1109/DEXA.1996.558289
C. Vassilakis, P. Georgiadis, A. Sotiropoulou
{"title":"A comparative study of temporal DBMS architectures","authors":"C. Vassilakis, P. Georgiadis, A. Sotiropoulou","doi":"10.1109/DEXA.1996.558289","DOIUrl":"https://doi.org/10.1109/DEXA.1996.558289","url":null,"abstract":"In the past few years, a number of implementations of temporal DBMSs has been reported. Most of these implementations share a common feature, which is that they have been built as an extension to a snapshot DBMS. The authors present three alternative design approaches that can be used for extending a snapshot DBMS to support temporal data, and evaluate the suitability of each approach, with respect to a number of design objectives.","PeriodicalId":438695,"journal":{"name":"Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127182604","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: 15
Optimizing the user-interface of a knowledge-based system 优化基于知识的系统的用户界面
Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96 Pub Date : 1996-09-09 DOI: 10.1109/DEXA.1996.558290
Carsten Rückert, Stephan Klein
{"title":"Optimizing the user-interface of a knowledge-based system","authors":"Carsten Rückert, Stephan Klein","doi":"10.1109/DEXA.1996.558290","DOIUrl":"https://doi.org/10.1109/DEXA.1996.558290","url":null,"abstract":"The knowledge-based system WIWENA was developed at the Technical University of Berlin for supporting design engineers during the selection and dimensioning of standard components. The system was then subjected to user tests in experiments during which design engineers had to solve a small design task in six hours. One set of designers could use WIWENA for selecting and dimensioning standard components, while a second group worked without it. The engineers were interviewed after the experiment. The study provided some recommendations for changing the user-interface of WIWENA and other knowledge-based systems to achieve higher user acceptance.","PeriodicalId":438695,"journal":{"name":"Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128606289","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: 1
An incremental update propagation scheme for a cooperative transaction model 一种用于协作事务模型的增量更新传播方案
Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96 Pub Date : 1996-09-09 DOI: 10.1109/DEXA.1996.558344
A. Oh, Jin-Oh Choi, B. Hong
{"title":"An incremental update propagation scheme for a cooperative transaction model","authors":"A. Oh, Jin-Oh Choi, B. Hong","doi":"10.1109/DEXA.1996.558344","DOIUrl":"https://doi.org/10.1109/DEXA.1996.558344","url":null,"abstract":"Engineering design applications require the support of long transactions in cooperative environments The problem of the existing copy/update/merge approaches is that the partial effects of a committed transaction may be not part of the merged version. The paper introduces a new cooperative transaction model, which allows updates to be progressively notified or propagated into other transactions accessing the same object. To support incremental update propagation and notification, the authors use the term dynamic dependency to define the intertransaction dependency relationships among all the objects checked out from the public database. Consistency in multiple copies of the same object is achieved by a two-phase delta-merge protocol. The model provides a synchronization of cooperative updates performed in several workspaces without using locking mechanisms.","PeriodicalId":438695,"journal":{"name":"Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132774945","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: 1
An introduction to enterprise-participant data model 企业参与者数据模型的介绍
Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96 Pub Date : 1996-09-09 DOI: 10.1109/DEXA.1996.558354
K. Xu, B. Bhargava
{"title":"An introduction to enterprise-participant data model","authors":"K. Xu, B. Bhargava","doi":"10.1109/DEXA.1996.558354","DOIUrl":"https://doi.org/10.1109/DEXA.1996.558354","url":null,"abstract":"A data model, called the enterprise-participant (EP) model, is proposed. Unlike other traditional data models including object oriented models, the enterprise-participant model takes a different angle to look at the real world. The concepts of participant, enterprise hierarchy and biography hierarchy are introduced to construct databases representing the universe of discourse. Participants, as basic units, provide finer granularity than entities in traditional data models. Enterprise hierarchies provide recursive abstractions of enterprises from entire database applications to individual printable attributes. Biography hierarchies provide an integrated view of all facts about entities. Because of its capacity to simplify the complexities of applications and of its natural hierarchical characteristics, the EP model promises: (1) more \"natural ways\" to represent data for database applications with complexities, (2) a uniform, advanced language, and (3) world-wide unique participant names to immediately support data integrations and distributions in worldwide, distributed and heterogeneous computing environments.","PeriodicalId":438695,"journal":{"name":"Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125898380","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
Using a distributed knowledge base to coordinate autonomous mobile systems 使用分布式知识库来协调自主移动系统
Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96 Pub Date : 1996-09-09 DOI: 10.1109/DEXA.1996.558291
Susanne Stöhr
{"title":"Using a distributed knowledge base to coordinate autonomous mobile systems","authors":"Susanne Stöhr","doi":"10.1109/DEXA.1996.558291","DOIUrl":"https://doi.org/10.1109/DEXA.1996.558291","url":null,"abstract":"The autonomy of mobile systems increases constantly. That means that the flexibility of their task execution, their capabilities to handle local conflicts and the usage of their local knowledge increase. The paper shows that because of this autonomy coordination in a factory must be reconsidered and that global coordination is still able to improve the efficiency and the safety of autonomous mobile systems. It suggests a knowledge structure for coordination containing global information which is called section knowledge. This section knowledge helps the mobile systems to coordinate themselves. Furthermore, some agents, using the section knowledge, are introduced which can advise the mobile systems. The section knowledge is stored in the distributed knowledge base, whose features of preventing the section knowledge of becoming a bottleneck are explained.","PeriodicalId":438695,"journal":{"name":"Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128164442","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: 3
Optimized parallel sets for data intensive applications 为数据密集型应用程序优化并行集
Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96 Pub Date : 1996-09-09 DOI: 10.1109/DEXA.1996.558293
K. Eder, L. Böszörményi
{"title":"Optimized parallel sets for data intensive applications","authors":"K. Eder, L. Böszörményi","doi":"10.1109/DEXA.1996.558293","DOIUrl":"https://doi.org/10.1109/DEXA.1996.558293","url":null,"abstract":"An extension of a general-purpose programming language (gpPL) is presented. It enables parallelism, persistence and query optimization based on sets. The authors demonstrate that in gpPLs the primitive \"set\" can be generalised for the needs of database and expert system applications. Side-effect free declarative queries, based on set expressions, can be optimized and executed in parallel. Individual optimization and parallelization are integral parts of the language system and compiler. Very different combinations of persistent or volatile, and parallel or sequential, and optimized or non-optimized implementations are possible. This is eased by the fact that a great part of the implementation is located outside the compiler with the help of predefined interfaces. Different algebras, optimizers or algorithms can be considered. The same program can be executed without modification in various systems or platforms.","PeriodicalId":438695,"journal":{"name":"Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96","volume":"491 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123728827","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
Uniform hypertext presentations on the World Wide Web 万维网上统一的超文本表示
Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96 Pub Date : 1996-09-09 DOI: 10.1109/DEXA.1996.558276
N. Aloia, S. Giuliano, G. A. Romano
{"title":"Uniform hypertext presentations on the World Wide Web","authors":"N. Aloia, S. Giuliano, G. A. Romano","doi":"10.1109/DEXA.1996.558276","DOIUrl":"https://doi.org/10.1109/DEXA.1996.558276","url":null,"abstract":"Users of the World Wide Web frequently have to access particular documents, for example via FTP or via Wais, that are not ready for managing by http clients using HTML. Such documents not only look poor, but moreover, they don't allow navigation to other sites containing related objects, unless a new request is made. The aim of the paper is to provide a hypertext presentation for those documents that have not been generated with such characteristics. The system we propose, Hypertext Presentation System (HPS), can generate HTML documents on the basis of documents in ASCII format. Its main aim is to provide uniform presentation modalities for semantically similar documents, even if these come from different sources.","PeriodicalId":438695,"journal":{"name":"Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130641764","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: 0
QUICK: graphical user interface to multiple databases QUICK:多个数据库的图形用户界面
Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96 Pub Date : 1996-09-09 DOI: 10.1109/DEXA.1996.558353
W. Tan, K. Wang, L. Wong
{"title":"QUICK: graphical user interface to multiple databases","authors":"W. Tan, K. Wang, L. Wong","doi":"10.1109/DEXA.1996.558353","DOIUrl":"https://doi.org/10.1109/DEXA.1996.558353","url":null,"abstract":"Formulating queries to access multiple databases can be a formidable task, especially when many terms from various databases and complex constraints are involved. To specify a multidatabase query, the user usually has to search through documents for exact database terms and learn the multidatabase language. The report presents QUICK (QUery Interface to CPL-Kleisli), a graphical user interface to multiple databases, CPL is a high-level multidatabase language built on top of an open query system Kleisli. QUICK allows users to handle overwhelming information from different data sources in an intuitive and uniform manner. The query specification is reduced to specifying user's terms in his/her own world, selecting paths and specifying constraints in a graph. QUICK is able to automatically generate a CPL query that corresponds to the user's intent.","PeriodicalId":438695,"journal":{"name":"Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128766452","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
Object histories as a foundation for an active OODB 对象历史作为活动OODB的基础
Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96 Pub Date : 1996-09-09 DOI: 10.1109/DEXA.1996.558263
J. V. D. Akker, A. Siebes
{"title":"Object histories as a foundation for an active OODB","authors":"J. V. D. Akker, A. Siebes","doi":"10.1109/DEXA.1996.558263","DOIUrl":"https://doi.org/10.1109/DEXA.1996.558263","url":null,"abstract":"Several links exist between active and temporal databases. These are summarised by the observation that rules are triggered by a specified evolution of the database. We discuss the relation between active and temporal database using DEGAS, an object based active database programming language. To achieve full active database functionality, a DEGAS object records its complete history. Hence, all data needed for a temporal database supporting a single temporal dimension is provided. Furthermore, the semantics of the active behaviour of DEGAS are defined straightforwardly in terms of the object history. Finally we discuss the advantages and disadvantages of extending DEGAS with a second time dimension (to achieve full temporal functionality) from an active database perspective.","PeriodicalId":438695,"journal":{"name":"Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126791258","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: 3
Resource discovery: modelling, cataloguing and searching 资源发现:建模、编目和搜索
Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96 Pub Date : 1996-09-09 DOI: 10.1109/DEXA.1996.558274
B. Desai, R. Shinghal
{"title":"Resource discovery: modelling, cataloguing and searching","authors":"B. Desai, R. Shinghal","doi":"10.1109/DEXA.1996.558274","DOIUrl":"https://doi.org/10.1109/DEXA.1996.558274","url":null,"abstract":"In seeking information resources on the Internet, existing search systems exhibit uneven selectivity (B.C. Desai and R. Shinghall, 1996). This problem has prompted a number of researchers to turn their attention to the development and implementation of metadata models for use in indexing and searching on the WWW and Internet (B.C. Desai, 1995). The objective of our project is to design a system to enable users to access data of a catalog nature stored in heterogeneous distributed information systems. These data describe resources available from virtual libraries on the Internet, in general, and the World Wide Web, in particular. We present our version of metadata for modelling document like resources. We also present our approach to modelling the expertise of librarians for cataloging, user entry and search using a rule based system.","PeriodicalId":438695,"journal":{"name":"Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116049918","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
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信