Faced with the fierce competition prevailing in the world's aircraft market, Daimler-Benz-Aerospace Airbus GmbH has developed a highly complex, internationally used planning system (APC) for Airbus Industrie in To...
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Faced with the fierce competition prevailing in the world's aircraft market, Daimler-Benz-Aerospace Airbus GmbH has developed a highly complex, internationally used planning system (APC) for Airbus Industrie in Toulouse, France. This IBM client/server solution was implemented to improve customer satisfaction, reliability and punctuality, while at the same time cutting costs and making use of synergistic effects.
Discusses the measurement of clientserver payback. suggests that companies should not be using return on investment because financial yardsticks cannot measure directly the long-term competitive advantage given by in...
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Presents major findings from an in-depth multi-company American study on the effective management of the distributed computing environment. The study, led by Cambridge Technology Partners, focuses on the management ap...
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Software bottlenecks are performance constraints caused by slow execution of a software task. In typical client-server systems a client task must wait in a blocked state for the server task to respond to its requests,...
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Software bottlenecks are performance constraints caused by slow execution of a software task. In typical client-server systems a client task must wait in a blocked state for the server task to respond to its requests, so a saturated server will slow down all its clients. A Rendezvous Network generalizes this relationship to multiple layers of servers with send-and-wait interactions (rendezvous), a two-phase model of task behavior, and to a unified model for hardware and software convention. software bottlenecks have different symptoms, different behavior when the system is altered, and a different cure from the conventional bottlenecks seen in queueing network models of computer systems, caused by hardware limits. The differences are due to the ''push-back'' effect of the rendezvous, which spreads the saturation of a server to its clients. The paper describes software bottlenecks by examples, gives a definition, shows bow they can be located and alleviated, and gives a method for estimating the performance benefit to be obtained. Ultimately, if all the software bottlenecks can be removed, the performance limit will be due to a conventional hardware bottleneck.
In a majority of networked virtual worlds, object sharing is limited to object geometries only. The BrickNet toolkit extends the sharing of objects to include dynamic object behaviors. This is achieved by combining a ...
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ISBN:
(纸本)0818670843
In a majority of networked virtual worlds, object sharing is limited to object geometries only. The BrickNet toolkit extends the sharing of objects to include dynamic object behaviors. This is achieved by combining a structured organizational paradigm for virtual worlds with an interpreted language. Sharing in virtual worlds is handled by transferring the program code that builds the structure and executes the behavior. The range of behaviors that can be shared in BrickNet include simple behaviors, virtual world dependent behaviors, reactive behaviors and capability-based behaviors.
The Library of the University of Constance is working on a project sponsored by the Deutsche Forschungsgemeinschaft which aims to automate interlending between the libraries of the universities in Constance and in Ulm...
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The Library of the University of Constance is working on a project sponsored by the Deutsche Forschungsgemeinschaft which aims to automate interlending between the libraries of the universities in Constance and in Ulm. The major objective of the project is to check the capabilities of two OSI-based communication protocols, X.400 and the ILL-protocol. The project regards interlending as a function of the local system. The local ILL management is also automated. Describes the routines of electronic interlending. The technical infrastructure of the ILL system consists of the ILL server and the ILL clients. The ILL server comprises the ILL management system, the ILL database and the X.400 mail system. The results of the project will be integrated in the ILL module of the standardized local system which is going to be developed in Baden-Wurttemberg. Beyond that the project is also the basis of the ILL system of the DBV-OSI-project.
Two decades ago, the data processing industry was using powerful mainframes with the users sharing CPU cycles and data storage facilities. Access to the mainframes was tightly controlled by Management Information Syst...
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Two decades ago, the data processing industry was using powerful mainframes with the users sharing CPU cycles and data storage facilities. Access to the mainframes was tightly controlled by Management Information Systems departments and the only method of accessing the data from mainframes was through punched cards or primitive terminals. Thus, when PC came to the computing industry in the early 1980s, their growth was phenomenal, as they provided limited CPU cycles and data storage facilities on user desktops, user control over desktops, and user-friendly PC-based software. PC, however, were still incapable of handling data processing needs of most large businesses. Local area networks (LAN) provided the solution by connecting PC and mainframes. Today, a wide spectrum of client-server Systems (CSS) are being implemented to make information easily accessible to the end-user. With the growth of client-server systems, one can anticipate that most vendors of CSS components will work toward open systems, which are easy to integrate and will require less in-house development to fit in within the CSS.
This paper discusses the design, implementation and evaluation of linear finite element programs that distribute their computations over a network of workstations. We consider five different algorithms based on direct...
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This paper discusses the design, implementation and evaluation of linear finite element programs that distribute their computations over a network of workstations. We consider five different algorithms based on direct, iterative and hybrid equation solvers, each of which partitions and maps the model domain across conventional network hardware. A software architecture based on the client-server model distributes the computations and, at the language level, Berkeley sockets enable communication between processes. We evaluate and describe the performance of these algorithms in terms of execution time and speed-up, and we conclude that distributed solvers, particularly those based on substructuring and static condensation, can be effective even on high-latency communication networks.
Last October, ICL announced the Goldrush Megaserver open database server, bringing massively parallel processing technology out of the laboratory and into the commercial arena. This article describes the product's...
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Last October, ICL announced the Goldrush Megaserver open database server, bringing massively parallel processing technology out of the laboratory and into the commercial arena. This article describes the product's role in information systems for organisations adapting to change and explains how this collaborative application of parallel and relational database technologies fits into the trend towards client-server computing.
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