Mobile objects are programs passed between distributed information servers for execution on remote sites within a limited environment. We describe the MHEG virtual machine specification which supports mobile code in a...
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Mobile objects are programs passed between distributed information servers for execution on remote sites within a limited environment. We describe the MHEG virtual machine specification which supports mobile code in a heterogeneous environment. MHEG VM is suitable for integration in many different distributed information systems, including the WWW. We briefly describe the possible integration of the MHEG VM with the HyOctane hypermedia system. We conclude this paper by discussing various issues associated with the design of robust mobile code systems. Copyright (C) 1996 Elsevier science Ltd
Lack of bandwidth has been shown to be a major impediment to achieving realism in large scale virtual worlds with many interacting entities. Recent projects that have addressed this problem have, for the most part, be...
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This paper describes the motivations for and main features of Tigger - a framework for the construction of a family of object-support operating systems that can be tailored for use in a variety of different applicatio...
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Lack of bandwidth and network latency are known to be major impediments to achieving realism in distributed virtual world (vw) applications with a large number of, potentially geographically dispersed, entities. This ...
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ISBN:
(纸本)9781450373395
Lack of bandwidth and network latency are known to be major impediments to achieving realism in distributed virtual world (vw) applications with a large number of, potentially geographically dispersed, entities. This paper describes a combination of techniques that we are using to overcome these twin problems. The techniques described are intended to reduce both the volume and frequency of communication between the entities that make up the virtual world and include the use of anonymous event-based communication with notify constraints, scoping of event propagation with zones, and use of predictive approaches to replica management. Each of these techniques is described in turn.
A Health Care Establishment (HCE) is an establishment where medical services are rendered. The above services are provided by the health care personnel. The infrastructure of a HCE may include Information Technology (...
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distributed multimedia information systems (DMIS) are concerned with multimedia information processing, multimedia information models, and multimedia information delivery in distributed computing environments. Today t...
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Authentication is a key requirement in the establishment of secure interactions between network entities. Several authentication and key establishment protocols have been proposed in recent years. Most of these protoc...
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作者：
Benz, HDepartment of Computer Science
Institute of Parallel and Distributed High Performance Systems University of Stuttgart Breitwiesenstr. 20-22 Stuttgart D-70565 Germany
Most of today's business requirements can only be accomplished through integration of various autonomous systems which were initially designed to serve the needs of particular applications. In the literature workf...
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ISBN:
(纸本)9783540617846
Most of today's business requirements can only be accomplished through integration of various autonomous systems which were initially designed to serve the needs of particular applications. In the literature workfiows are proposed to design these kinds of applications. The key tool for designing such applications is a powerful conceptual specification language. Such a language should be capable of capturing interactions and cooperation between component tasks of workflows among others. These include sequential execution, iteration, choice, parallelism and synchronisation. The central focus of this paper is the verification of such process control aspects in conceptual workflow specifications. As it is generally agreed upon that the later in the software development process an error is detected, the more it will cost to correct it, it is of vital importance to detect errors as early as possible in the systems development process. In this paper some typical verification problems in worldlow specifications are identified and their complexity is addressed. It will be proven that some fundamental problems are not tractable and we will show what restriction is needed to allow termination problems to be recognized in polynomial time.
Object-oriented development is a structuring paradigm. It does not provide substantial support for the specification of ‘end to end’ control and data flow. This has implications for hard real-time system development...
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