The knowledge about users acquired and formalised through a model may be used in more than one way in an interactive intelligent system. At the higher level, these models may be used for recognition and interpretation...
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Object-based collaborative graphics editing systems allow multiple users to edit the same graphics document at the same time from multiple sites. This paper examines the use of locking to prevent the generation of con...
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ISBN:
(纸本)0769505775
Object-based collaborative graphics editing systems allow multiple users to edit the same graphics document at the same time from multiple sites. This paper examines the use of locking to prevent the generation of conflicting operations in this type of systems. Two types of locks are examined: object and region. A locking scheme which preserves the intentions of all operations is proposed. Furthermore, the problems of lock ownership caused by concurrent operations are resolved.
distributed Object Technologies (DOTs) was becoming common and widely in the software development. Application and system development using Common Object Request Broker Architecture and Java provides robustness, flexi...
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ISBN:
(纸本)0780366522
distributed Object Technologies (DOTs) was becoming common and widely in the software development. Application and system development using Common Object Request Broker Architecture and Java provides robustness, flexibility, and reusability. So the performance of CORBA HOP implementation is crucial in high-performance network computingsystems. This paper aims at studying and evaluating the object communication mechanism in CORBA environment in order to analyze the object operations compared with the conventional network communication programming, find the key sources for reducing the overhead of communications and improving the communications performance.
Choosing information technology (IT) is a high-risk guessing game to some extent because of its strategic nature within organizations and the threat of obsolescence as it turns over rapidly. Because the course of ente...
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ISBN:
(纸本)0780366522
Choosing information technology (IT) is a high-risk guessing game to some extent because of its strategic nature within organizations and the threat of obsolescence as it turns over rapidly. Because the course of enterprise computing has been dictated by prevailing technologies and expedited by competitive pressures and its strategic significance, complex heterogeneous architectures have become wide spread. The typical enterprise utilizes centralized legacy mainframe and midrange, distributed client server, and is quickly adapting the newest to the mix, Internet/intranet. Moving into each strategy has presented enormous investments in time and new technologies, for which the unsuspecting executive has witnessed ever-shrinking periods of investment payback. Overall the picture is a confused mix of disparate systems presenting significant challenges to the enterprise and its IT staff. Going forward the successful enterprise-computing model will be based on integrated applications and systems, a more manageable architecture that is complemented rather than disturbed by new technologies, and a simplified client device that is independent of the enterprise operating environment. This paper presents server-based computing as a strategy that facilitates simplifying the desktop by migrating its complexities and liabilities into a more effectively managed centralized location, while delivering the same level of functionality and familiar user interface. This approach isolates the dependency of the desktop, and fosters time-to-value, quality of service and administrative effectiveness, universal accessibility, high security, long-term growth and adaptability, and relatively low cost of ownership.
The proceedings contain 95 papers. The topics discussed include: a middleware approach for combining heterogeneous data sources - integration of generic query and predefined function access;XML content management base...
ISBN:
(纸本)0769505775
The proceedings contain 95 papers. The topics discussed include: a middleware approach for combining heterogeneous data sources - integration of generic query and predefined function access;XML content management based on object-relational database technology;distributed object-oriented schema for XML-based electronic catalog sharing semantics among businesses;a semantic similarity approach to electronic document modeling and integration;logging and signing document-transfers on the WWW - a trusted third party gateway;developing an XML gateway for business-to-business commerce;online web mining transactions association rules using frame metadata model;a web based system for managing university research centre web sites;real-time quiz functions for dynamic group guidance in distance learning systems;a principled approach for formative web learning assessment and adaptive tutoring;and personalized courseware construction based on web data mining.
The proceedings contain 95 papers. The topics discussed include: a middleware approach for combining heterogeneous data sources - integration of generic query and predefined function access;XML content management base...
ISBN:
(纸本)0769505775
The proceedings contain 95 papers. The topics discussed include: a middleware approach for combining heterogeneous data sources - integration of generic query and predefined function access;XML content management based on object-relational database technology;distributed object-oriented schema for XML-based electronic catalog sharing semantics among businesses;a semantic similarity approach to electronic document modeling and integration;logging and signing document-transfers on the WWW - a trusted third party gateway;developing an XML gateway for business-to-business commerce;online web mining transactions association rules using frame metadata model;a web based system for managing university research centre web sites;real-time quiz functions for dynamic group guidance in distance learning systems;a principled approach for formative web learning assessment and adaptive tutoring;and personalized courseware construction based on web data mining.
Due to development of recent computer systems and computer networks such as the Internet, people are taking advantage of these systems for distance learning. We have been developing an advanced distance learning syste...
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ISBN:
(纸本)0769505775
Due to development of recent computer systems and computer networks such as the Internet, people are taking advantage of these systems for distance learning. We have been developing an advanced distance learning system called VIEW Classroom. In conventional systems communication from a lecturer to students is considered to be the most important function. Although communication from students to a lecturer is also essential, mostsystems ignore the importance of communication among students. students can study through discussion among them. Conventional chat systems are not suitable for such purposes, since proper guidance of discussion from a lecturer cannot be realized A lecturer has to observe the situations of discussion outline and to central the discussions among students. For such purposes we need to develop various kinds of visualization functions for distributed discussion systems. In this paper visualization and control functions for discussion systems are introduced in order to satisfy these requirements. A prototype system is developed for VIEW Classroom and usefulness of these functions are shown.
The Internet commerce increases the demands of service integrations by sharing XML-based catalogs. We propose the PCO data model supporting semantic inheritance to ensure the synonymy of heterogeneous semantics among ...
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ISBN:
(纸本)0769505775
The Internet commerce increases the demands of service integrations by sharing XML-based catalogs. We propose the PCO data model supporting semantic inheritance to ensure the synonymy of heterogeneous semantics among distributed schemas that different authors define independently. Also, the PCO model makes semantic relation ships independent of an initial class hierarchy, and enables rapid schema evolution across the Internet business. This preserves semantic interoperability without changing predefined classes. We have also encoded the PCO model into two XML-base languages: PCO Specification Language (PSL) and Portable Composite Language (PCL). This paper demonstrates that intermediaries defining service semantics in PSL can automatically integrate multi-suppliers' PCL catalogs for their agent-mediated services.
It is expected that the 1st generation Personal Communication Network (PCN) will be implemented on the DCS1800 which is a Global System of Mobile (GSM) standard. Similar research work has shown that the conventional c...
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It is expected that the 1st generation Personal Communication Network (PCN) will be implemented on the DCS1800 which is a Global System of Mobile (GSM) standard. Similar research work has shown that the conventional centralized structure and mobility management mechanism of current GSM fixed networks is not suitable for future high capacity PCN services. In this paper, a Hierarchical ATM Backbone Architecture (HATMBA) has been presented for future high capacity PCN, a distributed mobility management strategy has been developed for HATMBA. Simulation results have been analyzed to evaluate the performance of HATMBA mobility control protocols.
To cope with industrial growth, efficient linkages are required to various divisions' systems, on different machines, from remote or mobile PCs. To meet this requirement, a knowledgeable interface system, MAKIS, f...
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To cope with industrial growth, efficient linkages are required to various divisions' systems, on different machines, from remote or mobile PCs. To meet this requirement, a knowledgeable interface system, MAKIS, for mobile computer users was developed. MAKIS comprises mobile (or remote) computers and server computers called wrap servers. MAKIS has three kinds of agents. It includes and utilizes flexibly organized goal-centered complex knowledge for system-linkage and business-operation. Utilizing this knowledge, MAKIS enables the prompt easy reuse of existing knowledge in conventional systems, in various sections, without changing their software, from remote or mobile PCs in a standard distributed environment. An experimental application to elevator renewal cost estimation proved the effectiveness of MAKIS. For example, using conventional systems, 17 screens were needed per estimation, but MAKIS needed only 1 screen. As a result even those who have little expertise either in estimation or in system linkage could make estimates promptly from outside the office.
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