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检索条件"任意字段=12th International Conference on Embedded and Real-Time Computing Systems and Applications"

共 3157 条记录，以下是3061-3070 订阅

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Modeling temporal consistency in data warehouses 12

Modeling temporal consistency in data warehouses

引用

12th international conference on Database and Expert systems applications (DEXA)

作者： Bruckner, RM List, B Schiefer, J Tjoa, AM Vienna Tech Univ Inst Software Technol A-1040 Vienna Austria

ISBN: (纸本)0769512305

real-world changes are generally discovered delayed by computer systems. the typical update patterns for traditional data warehouses on an overnight or even weekly basis enlarge this propagation delay until the information is available to knowledge workers. the main contribution of the paper is the identification of two different temporal characterizations of the information appearing in a data warehouse: one is the classical description of the time instant when a given fact occurred, the other represents the instant when the information has been entered into the system. We present an approach for modeling conceptual time consistency problems and introduce a data model that deals with timely delays and supports knowledge workers to determine what the situation was in the past, knowing only the information available at a given instant of time.

关键词： Availability Computerized monitoring Data analysis Data models Data warehouses Delay effects Delay systems Information analysis Information systems Propagation delay

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A system for collaborative music composition over the web 12

A system for collaborative music composition over the web

引用

12th international conference on Database and Expert systems applications (DEXA)

作者： Jordà, S Wüst, O Pompeu Fabra Univ Audiovisual Inst Mus Technol Grp Barcelona 08003 Spain

ISBN: (纸本)0769512305

In this paper the authors propose a new architecture and new features for collaborative music composition. these design principles have been applied, without any loss of generality, to a system that has already been extensively tested on-line for the last three years, and which has allowed composers from around the world to participate in the collective creation of two important theatrical scores. they can constitute the basis for new approaches for collective composition on the Internet.

关键词： Collaboration Collaborative work Computer networks Continuous production Fingers Internet Multiple signal classification real time systems Rockets System testing

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ADTP: A new protocol for data processing over the Internet 12

ADTP: A new protocol for data processing over the Internet

引用

12th international conference on Database and Expert systems applications (DEXA)

作者： Kwak, JD Elmasri, R Choi, W Ye, R Mahareddy, A Univ Texas Dept Comp Sci & Engn Arlington TX 76019 USA

ISBN: (纸本)0769512305

Emerging e-commerce applications typically use a Web server and CGI (Common Gateway Interface) for data processing. this client/server architecture is suitable when the Internet is not congested and the database server is not overloaded, but it may cause problems if congestion and overloading occur A certain class of DPS (Data Processing System), applications, such as order processing or sales reporting, do not require real-time response, so they may utilize email (Simple Mail Transport Protocol) or other protocols that allow delaying or relaying of data. In this paper, we, propose an innovative model of DPS (the Senddata System) that avoids congestion on the Internet and exploits a database server around the clock. Our model provides easy access to the database server and fits naturally in the middle tier of the three-tier model for database access, while providing performance and security. E-commerce applications may use our model in the presence of congestion on the Internet or unavailability of the server.

关键词： Access protocols Data processing Databases Delay Internet Marketing and sales Postal services real time systems Transport protocols Web server

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Electronic government and software confederations 12

Electronic government and software confederations

引用

12th international conference on Database and Expert systems applications (DEXA)

作者： Král, J Zemlicka, M Fac Math & Phys Dept Software Engn CR-11800 Prague 1 Czech Republic

ISBN: (纸本)0769512305

the state (public) information system (SIS) is the precondition of electronic government. SIS should provide all the services of the information systems of various offices and enable access of citizens to data without any knowledge about the internal structure of SIS. It is very difficult to achieve it. the reasons are political conditions, power interests of various groups and offices, lobbying, system size, the necessity, to rise existing subsystems for a quite long time, etc. the only known feasible solution is the peer-to-peer network of autonomous components (software confederation). It has not been recognized yet although there are good tools for the development software confederations (XML, Internet). Due to bad practices of the development of SIS is usually very slow and the properties of it are far from needs. We shall discuss the software engineering properties of software confederations and the consequences for management of SIS. the principles of confederations are very simple but they are very difficult to apply them consistently.

关键词： Chromium Collaboration Computer architecture Electronic government Information systems Internet Peer to peer computing Software engineering Software tools XML

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Agent-based knowledge extraction services inside enterprise data warehousing systems environments 12

Agent-based knowledge extraction services inside enterprise ...

引用

12th international conference on Database and Expert systems applications (DEXA)

作者： Lourenço, A Gonçalves, J Belo, O Univ Minho Escola Engn Dept Informat P-4700320 Braga Portugal

ISBN: (纸本)0769512305

During their lifetimes, enterprises have been storing and maintaining huge amounts of business and operational information. As time passed their information repositories grown almost exponentially and they have typically got "drown" in data. So, they felt the urge for more suitable systems, capable of gathering, treating and storing this data avalanche in appropriated manners. therefore, it is necessary to conceive and implant adequate analytical systems, capable of dealing with this huge potential of information in the best way, and providing new knowledge about the activities of organizations. Taking these real scenarios into account, we designed and developed a multi-agent system specially conceived to support knowledge extraction processes over data warehousing systems, covering the definition and preparation of the data repositories to be mined, till the visualization and manipulation of the results.

关键词： Data analysis Data mining Data visualization Humans Implants Information analysis Multiagent systems Oceans Warehousing Weapons

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Performance Evaluation of a Non-Blocking Multithreaded Architecture for embedded, real-time and DSP applications 14

Performance Evaluation of a Non-Blocking Multithreaded Archi...

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14th international conference on Parallel and Distributed computing systems, PDCS 2001

作者： Kavi, Krishna M. Arul, Joseph Giorgi, Roberto The University of Alabama Huntsville United States The University of Siena Italy

ISBN: (纸本)9781618395740

this paper presents the evaluation of a non-blocking, decoupled memory/execution, multithreaded architecture known as the Scheduled Dataflow (SDF). the major recent trend in digital signal processor (DSP) architecture is to use complex organizations to exploit instruction level parallelism (ILP). the two most common approaches for exploiting the ILP are Superscalars and Very Long Instruction Word (VLIW) architectures. On the other hand, our research explores a simple, yet powerful execution paradigm that is based on non-blocking threads, and decoupling of memory accesses from execution pipeline. this paper compares the execution cycles required for programs on SDF with the execution cycles required by programs on Superscalar and VLIW architectures. © (2001) by the international Society for Computers and their applications All rights reserved.

关键词： Digital signal processors

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VoIP using Frag aentatlon and Interleaving over Slow WAN links 14

VoIP using Frag aentatlon and Interleaving over Slow WAN lin...

引用

14th international conference on Parallel and Distributed computing systems, PDCS 2001

作者： Bhagavathula, R. Hassan, K. Ali, F. Abbasi, Md. Pendse, R. Department of Electrical Engineering Wichita State University 1845 N Fairmount WichitaKS67260-0044 United States Cisco Systems Inc. San JoseCA United States

ISBN: (纸本)9781618395740

the integration of voice and data networks poses a great challenge for today's internetworking environment. Voice traffic, being real-time in nature, demands compliance to a very rigid set of QoS issues. these issues become more prominent with bandwidth-limited slow WAN links. this paper investigates the impact of fragmentation and interleaving of voice/data packets over slow WAN links on voice quality of a typical VoIP enabled data network. Results obtained from simulations reveal the inefficiency of IP MTU size reduction for improving voice quality. Further, fragmentation techniques like FRF. 12 and LFI were observed to yield better voice quality. © (2001) by the international Society for Computers and their applications All rights reserved.

关键词： Voice/data communication systems

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An e-store developing model for minimizing the impact of procedural and cultural change within an enterprise 12

An e-store developing model for minimizing the impact of pro...

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12th international conference on Database and Expert systems applications (DEXA)

作者： Kwan, ISY Lingnan Univ Dept Informat Syst Tuen Mun Hong Kong Peoples R China

ISBN: (纸本)0769512305

Internet, Value Added Network (VAN) and Electronic Data Interchange (EDI) had revolutionized global trade and services. We have emerged to a new experience of global virtual market where trading could be carried out in cyberspace. As electronic markets are possible for small and large enterprises competing as equal players, Business-to-business (B2B) and Business-to-Consumers (B2C) via electronic Commerce (e-Commerce) systems operating On Internet are producing profound changes in enterprise culture on a global basis. Financial institutions and retail business in Asia are believed to be falling far behind the US and Europe when it comes to using the Internet for business. Despite the cultural and environmental differences in marketing between west and east, this reality has provided a vision for the second generation of e-Commerce application developers to learn the issues that had been experienced by these pioneer companies whom had participated in e-Commerce for a while. Indeed, over the heat of e-Commerce, companies are now thinking big and acting small in developing their e-Commerce applications. they are willing to tactfully slow down their pace in transforming business to electronic-Business (e-Business) via BPR (Business Process Reengineering). Investing extra time and cost in securing their business, instead of getting into pre-mature commitment in e-business applications development which is not going to last long or with huge difficulties in maintenance. this paper provide an outline of our investigation. on the issues in developing e-stores and identified the crucial constitution in developing a successful e-Commerce system while proposing a model for traditional industry to establish its electronic or virtual stores. We analyze the development process between traditional and electronic stores to help business to plan on new process. the contribution of this research is a novel approach embedded in a unique model for establishing e-stores (electronic Stor

关键词： Internet EDI digital economy e-Business e-Commerce web-based information systems IDEF BPR e-stores

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Updatability in federated database systems 12th

引用

12th international conference on Database and Expert systems applications, DEXA 2001

作者： Lee, Mong Li Lee, Sin Yeung Ling, Tok Wang School of Computing National University of Singapore Singapore

ISBN: (纸本)3540425276

It is important to support updates in federated database systems. However, not all updates on the federated schema are possible because some may violate certain constraints in the local databases which are involved in the federation. In this paper, we give a formal framework which characterizes the conditions under which a federated schema object type is updatable. We study the steps involved to systematically map an update request on an external view of a federated schema into the equivalent update(s) on the local databases. We also consider the situation where semantically equivalent object types may not model exactly the same set of objects in the real world. We ensure that the set constraints (EQUAL, SUBSET, DISJOINT) between the instance sets of equivalent object types are not violated after an update. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Database systems

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An efficient distributed concurrency control algorithm using two phase priority 12th

引用

12th international conference on Database and Expert systems applications, DEXA 2001

作者： Lee, Jong Sul Shin, Jae Ryong Yoo, Jae Soo Department of Computer and Communication Eng Chungbuk National University 48 Gaesin-dong CheongjuChungbuk361-763 Korea Republic of

ISBN: (纸本)3540425276

Many concurrency control algorithms for distributed real-time database systems have been proposed. But there isn’t a representative concurrency control algorithm for replication environment. In this paper, we propose an efficient concurrency control algorithm for distributed real-time database systems in replication environment. the main ideas of this paper are promoting priority and trading of data. Promoting priority is that the priority of the transaction that enters into voting phase is elevated. Trading of data is that a holder in the voting phase can lend holding data to other transactions. the proposed algorithm does not cause priority inversion. therefore it decreases the ratio of restarting transactions and guarantees a transaction to commit at its maximum. Also to reduce blocking times of transactions, it permits data of a transaction in the voting phase to lend to the others. It is shown through the performance evaluation that the proposed algorithm outperforms the existing algorithms such as DO2PL_PA and MIRROR. © Springer-Verlag Berlin Heidelberg 2001.

关键词： real time systems

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