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Proceedings of CoopIS 97: 2nd IFCIS Conference on Cooperative Information Systems

24-27 June 1997

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Displaying Results 1 - 25 of 31
  • Proceedings of CoopIS 97: 2nd IFCIS Conference on Cooperative Information Systems

    Publication Year: 1997
    Request permission for commercial reuse | PDF file iconPDF (195 KB)
    Freely Available from IEEE
  • Poster on a distributed RAID VOD system

    Publication Year: 1997
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (111 KB)

    Summary form only given. We present an implementation of a VOD (video on demand) system that addresses the problem of increasing video stream supply capabilities. To obtain fundamental video stream transfer characteristics on Ethernet, we first performed an experiment in which it became clear that bottlenecks of the CPU of a video server were the most serious. To solve this problem we implemented ... View full abstract»

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  • Poster on "Exception handling in ADOME workflow management system"

    Publication Year: 1997
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (108 KB)

    Summary form only given. The paper discusses exception handling in ADOME workflow management system (WMS). ADOME (Advanced Object Modeling Environment) is an active OODBMS extended with role facilities, built by integrating ITASCA (OODB) and CLIPS (inference engine). It provides a good supporting environment for the dynamic features required for a workflow management system, especially for online ... View full abstract»

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  • Poster on transparent access to a network of information sources and service providers via a universal relation interface

    Publication Year: 1997
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (110 KB)

    Summary form only given. We propose the use of the universal relation as a user interface to provide transparent access to a network of distributed, heterogeneous, and autonomous information sources. We implement this interface in two layers. The lower layer consists of access scripts, which encapsulate knowledge about information sources and are capable of answering basic queries. The upper layer... View full abstract»

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  • Poster on accept heterogeneity: an event monitoring service for CORBA-based heterogeneous information systems

    Publication Year: 1997
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (117 KB)

    Summary form only given. Today's distributed information systems often are collections of existing information sources and as such heterogeneous. Technical integration of heterogeneous sources is supported by CORBA. However, CORBA provides very general support and does not take source specific semantics into account. This also applies to CORBA's Event Service. Our objective is to enhance CORBA by ... View full abstract»

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  • Electronic circulation of copyrighted information in CSCW environments

    Publication Year: 1997
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (106 KB)

    Summary form only given. Computing and communications technologies have revolutionized the methods for creation, reproduction, and dissemination of copyrighted multimedia information. The demand on this electronic information increases rapidly as developers and users migrate to computer supported cooperative work, or CSCW, environments. Central to CSCW environments is information sharing both at t... View full abstract»

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  • Poster on rule-based technology for schema transformation

    Publication Year: 1997
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (139 KB)

    Summary form only given. As the first step of database integration, a participating local database schema should be transformed into an abstract one to remove data model conflicts. For our project, the object-oriented schema is chosen to represent the integrated information and a semi-automatic method is developed to transform relational schemas into OO schemas. The main idea behind this method is... View full abstract»

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  • Index of authors

    Publication Year: 1997, Page(s): 233
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    Freely Available from IEEE
  • Configuration detection as a problem of knowledge discovery in computer networks

    Publication Year: 1997, Page(s):47 - 55
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    Presents a type of knowledge discovery that is slightly different from data mining in database systems-configuration detection in computer networks. In computer networks, one needs to know which objects exist and where they are located. We call the acquisition of this knowledge “configuration detection”. We are interested in hosts and routers on an internetwork within an organization. ... View full abstract»

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  • An architecture for intelligent resource agents

    Publication Year: 1997, Page(s):151 - 159
    Cited by:  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (852 KB)

    The paper describes an intelligent resource agent architecture comprising several classes of mediating agents, which interact cooperatively in a distributed environment to enable appropriate, timely, customized access to Internet resources. These agents communicate with each other in terms of a shared set of object definitions, encoded in a common message syntax. Messages are transmitted via the K... View full abstract»

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  • Federating object-oriented and relational databases: the IRO-DB experience

    Publication Year: 1997, Page(s):2 - 13
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1152 KB)

    From the beginning of 1994 to the end of 1996, the IRO-DB (Interoperable Relational and Object-Oriented Databases) ESPRIT project has developed tools for accessing relational and object-oriented databases in an integrated way, and for designing and maintaining integrated applications on large federations of heterogeneous databases. IRO-DB is based on the ODMG pivotal object model and gives an OQL/... View full abstract»

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  • Enabling cooperation among disconnected mobile users

    Publication Year: 1997, Page(s):36 - 45
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1024 KB)

    Mobile computing and workgroup computing are emerging technologies which have so far been treated independently. Current approaches to support cooperative work neglect the special characteristics of mobile environments like limited bandwidth or temporary disconnection. On the other hand, approaches to support disconnected operation in mobile environments rely on the assumption that the degree of d... View full abstract»

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  • On context-based naming in information bases

    Publication Year: 1997, Page(s):140 - 149
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    In information bases following semantic and object-oriented data models logical names are used for the external identification of objects. Yet the naming schemes employed are not “natural” enough and several problems often arise: logical names can be ambiguous, excessively long, unrelated to or unable to follow the changes of the environment of named object. In natural language, simila... View full abstract»

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  • Fault-tolerant and approximate reasoning in multi-source environments

    Publication Year: 1997, Page(s):66 - 72
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (724 KB)

    When different knowledge-based systems must cooperate to perform decision tasks that are beyond their individual capabilities, we are faced with the problem of combining knowledge in a multi-source environment. In particular, we are confronted with two main difficulties: the prospect of inconsistency, which arises when different knowledge bases are merged together, and the high computational compl... View full abstract»

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  • Collision of constrained work spaces: a uniform concept for design interactions

    Publication Year: 1997, Page(s):25 - 35
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1020 KB)

    Since participants in a design process are almost separated in time (in addition to the usual separation in space), databases are an ideal medium to support and control their interaction. The basic premise of the paper is that each design artifact can be represented as a design object which occupies a certain domain in an n-dimensional work space which includes time in order to reflect the design ... View full abstract»

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  • A paradigm for security enforcement in CapBasED-AMS

    Publication Year: 1997, Page(s):79 - 88
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (968 KB)

    The CapBasED-AMS (CAPability-BASed and Event-Driven Activity Management System) deals with the management and execution of activities. A problem-solving agent (PSA) is a human, a hardware system or a software system having the ability to execute activities. An activity consists of multiple interdependent tasks that need to be coordinated, scheduled and executed by a set of PSAs. Since security is ... View full abstract»

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  • A distributed execution environment for large-scale workflow management systems with subnets and server migration

    Publication Year: 1997, Page(s):99 - 108
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    If the number of users within a workflow management system (WFMS) increases, a central workflow server (WF-server) and a single local area network (LAN) may become overloaded. The approach presented in the paper describes an execution environment which is able to manage a growing number of users by adding new servers and subnets. The basic idea is to decompose processes into parts which are contro... View full abstract»

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  • A TV news retrieval system with interactive query function

    Publication Year: 1997, Page(s):184 - 192
    Cited by:  Papers (1)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    The paper describes a system which can automatically classify TV news articles using a keyword spotting technique and can also answer queries from users interactively. The keyword spotting technique can extract a keyword sequence with their probabilities and the extracted keywords are attached to the article for retrieval. The TV news article can be classified into topics such as politics, economy... View full abstract»

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  • Accessing heterogeneous data through homogenization and integration mediators

    Publication Year: 1997, Page(s):130 - 139
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (884 KB)

    The AURORA mediator system employs a novel 2-tier, plug-and-play mediation model that is designed to facilitate access to a large number of heterogeneous data sources. The paper describes AURORA's mediation model and a suite of techniques used by a specific AURORA mediator, AURORA-RH. This suite includes a mediation methodology provided via an interactive mediator author's toolkit (MAT), a mediati... View full abstract»

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  • Poster on a terminology server for cooperative terminology work

    Publication Year: 1997
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (84 KB)

    A terminology represents the comprehensive list of concepts used in a particular subject area, their definitions, and terms viz. the names used in order to denote the concepts in a given language. Terminology work includes the creation and maintenance of terminologies. Our goal has been to provide a method to construct terminologies as ontological foundations for integrating information systems as... View full abstract»

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  • Task sharing among agents using reactive rules

    Publication Year: 1997, Page(s):56 - 65
    Cited by:  Papers (2)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (868 KB)

    Coordination and collaboration are naturally used by groups for carrying out activities and solving problems that require cooperation. However, getting a set of computer agents to do the same has been a problem-primarily addressed by the AI community and recently by the database community as workflow and process management problems. Not surprisingly, the problem has been addressed at different lev... View full abstract»

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  • Semi-automatic wrapper generation for Internet information sources

    Publication Year: 1997, Page(s):160 - 169
    Cited by:  Papers (30)  |  Patents (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1160 KB)

    To simplify the task of obtaining information from the vast number of information sources that are available on the World Wide Web (WWW), the authors are building information mediators for extracting and integrating data from multiple Web sources. In a mediator based approach, wrappers are built around individual information sources to translate between the mediator query language and the individu... View full abstract»

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  • Cooperative view mechanisms in distributed multiuser hypermedia environments

    Publication Year: 1997, Page(s):15 - 24
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1084 KB)

    Distributed multi-user hypermedia environments provide not only information-sharing mechanisms but also user collaboration/communication facilities. The provision of integrated views of heterogeneous information resources is necessary to create a common understanding among the users, who are possibly distributed in terms of geography and time. However, the requirements of customization must also b... View full abstract»

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  • Panel on cooperative multiagent systems for the Web

    Publication Year: 1997, Page(s):74 - 77
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    There is an explosion in the amount of information that is accessible by the public, especially with the advent of the World Wide Web. With this information only expected to increase as time goes on, there is an obvious need for mechanisms which would allow individuals to access the right information. In the context of the Web, this can be referred to as personalization of the information source(s... View full abstract»

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  • Design and implementation of a distributed workflow enactment service

    Publication Year: 1997, Page(s):89 - 98
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    Workflows are activities involving the coordinated execution of multiple tasks performed by different processing entities, mostly in distributed heterogeneous environments, which are very common in enterprises of even moderate complexity. In current commercial workflow systems, the workflow scheduler is a single centralized component. A distributed workflow enactment service, on the other hand, sh... View full abstract»

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