Many object-oriented methodologies give the impression that the process of taking a completed design and implementing it is mechanistic, even trivial. Instead software engineers find in practice that there are a large...
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Many object-oriented methodologies give the impression that the process of taking a completed design and implementing it is mechanistic, even trivial. Instead software engineers find in practice that there are a large number of decisions still to be taken even after the specification and design are complete. This is particularly true when the implementation language for the product is designed to allow the widest possible range of implementation choices; so it is particularly true when the implementation language is C++. This paper describes some of the implementation issues faced by one project, and examines some of the additional personal role that aided their resolution. The project under development was an embedded system performing protocol conversion and database caching, part of a network management system.< >
This paper describes the progress and interim findings of research at the MSI Research Institute at Loughborough University concerned with: consolidating and developing modelling methods and tools, which support the d...
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This paper describes the progress and interim findings of research at the MSI Research Institute at Loughborough University concerned with: consolidating and developing modelling methods and tools, which support the design and implementation of integrated systems; and identifying requirements for modelling 'resources', to support the engineering of manufacturing enterprises. The research is funded jointly by the CDP committee of EPSRC and UK industry and is being advanced in conjunction with a consortium of manufacturing user organisations and their software and system suppliers.
Concerns the modelling of complex hierarchical manufacturing systems, where overall control of the manufacturing organisation is devolved through manufacturing cells and ultimately to individual operations. Control is...
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Concerns the modelling of complex hierarchical manufacturing systems, where overall control of the manufacturing organisation is devolved through manufacturing cells and ultimately to individual operations. Control is maintained at the many levels by the flow of instructions from higher levels, but it is essential to the coordination of lower level activities that actual performance results in revised control through some form of feedback loop. The background of simulation is outlined in relationship to object-oriented programming, and then the proprietary software used is considered. Three strands of related research undertaken to date are described, then it is shown how these strands may be drawn together to form an integrated manufacturing system modelling package.< >
The production of pulsed power in a form which can propagate through free space, without the assistance of guiding structures, usually requires that the pulsed power be in the form of a high frequency electromagnetic ...
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The production of pulsed power in a form which can propagate through free space, without the assistance of guiding structures, usually requires that the pulsed power be in the form of a high frequency electromagnetic wave. The research in this field at Strathclyde University has mainly concerned the electron cyclotron maser and related devices such as the CARM. A review of the progress of this work is presented and a brief description of some of the other active research in the field of high power microwave sources is given. The author shows how computational research is a very important means of predicting and analysing the results from the high power microwave experiments.< >
When the Olivetti Research Laboratory in Cambridge (ORL) was founded in 1986, its initial members had, over the previous few years, been heavily involved with the development of the Cambridge Model Distributed System:...
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When the Olivetti Research Laboratory in Cambridge (ORL) was founded in 1986, its initial members had, over the previous few years, been heavily involved with the development of the Cambridge Model Distributed System: an experiment in distributed computing based on the 10 Mbps Cambridge Ring. More recently, they had also been involved in the design of the 100 Mbps Cambridge Fast Ring (CFR) which was then at a prototype stage. Networking formed the main focus of the new research laboratory. From this background in networking and distributed systems came an interest in multimedia: the Cambridge Ring had allowed a small number of experiments with audio and slow-scan video, but the bandwidths available were too limiting. The CFR, for the first time, gave sufficient bandwidth to begin research into distributed multimedia systems-research which led directly to Pandora project. More recently, the experience with slotted rings has been applied to the area of asynchronous transfer mode (ATM) networks: implementations which run at 100 Mbps over twisted pair, coaxial or optical fibre cable already exist, and research is also in progress to investigate running ATM protocols over radio and infra-red based wireless networks.< >
Angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy (STM) have become indispensable tools in the study of correlated quantum materials. Both probe complementary aspects of the single-pa...
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Angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy (STM) have become indispensable tools in the study of correlated quantum materials. Both probe complementary aspects of the single-particle excitation spectrum. Taken together, ARPES and STM have the potential to explore properties of the electronic Green’s function, a central object of many-body theory. This review explicates this potential with a focus on heavy-electron quantum criticality, especially the role of Kondo destruction. A discussion on how to probe the Kondo destruction effect across the quantum-critical point using ARPES and STM measurements is presented. Particular emphasis is placed on the question of how to distinguish between the signatures of the initial onset of hybridization-gap formation, which is the “high-energy” physics to be expected in all heavy-electron systems, and those of Kondo destruction, which characterizes the low-energy physics and, hence, the nature of quantum criticality. recentprogress and possible challenges in the experimental investigations are surveyed, the STM and ARPES spectra for several quantum-critical heavy-electron compounds are compared, and the prospects for further advances are outlined.
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