On-going improvements in the scaling of FPGA device sizes and time-to-market pressures encourage the use of module-oriented design flows [3], while economic factors favour the reuse of smaller devices for high perform...
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On-going improvements in the scaling of FPGA device sizes and time-to-market pressures encourage the use of module-oriented design flows [3], while economic factors favour the reuse of smaller devices for high performance computational tasks. One of the core problems in proposing dynamic modular reconfiguration approaches is supporting the differing communications needs of the sequence of modules configured over time [2]. Proposals to date have not focussed on communications issues. Moreover, they have advocated the use of specific protocols [4], or they cannot be readily implemented [1], or they suffer from high overheads [5], or rely upon deprecated features such as tri-state lines [7]. In contrast, we propose a methodology for the rapid deployment of a communications infrastructure that provides the wires required by dynamic modules and allows users to implement the protocols they want. Our aim is to support new tiled dynamically reconfigurable architectures such as Virtex-4, as well as mature device families.
The liquid-crystal spatial light modulators (SLMs), are proving to be an important tool for research aimed at emulation of atmospheric turbulence. Emulating turbulence is necessary for testing the performance of adapt...
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The liquid-crystal spatial light modulators (SLMs), are proving to be an important tool for research aimed at emulation of atmospheric turbulence. Emulating turbulence is necessary for testing the performance of adaptive-optics system in a controlled environment. SLMs have the ability to compensate for hundreds of waves of aberration through the use of modulo 2π operation. Thus, a device with only slightly more than one wave of phase stroke can emulate large phase of strokes. Optical modulation is not directly dependent on the back-plane used, but instead on the liquid-crystal and the liquid-crystal layer thickness, the same backplane can be used for many application. This modular design makes SLMs versatile across a wide range of technologies such as optical correlators, beamsteerers, optical trapping, and many more.
We demonstrate, for the first time, micromechanical detection of the neurotransmitter dopamine and its discrimination from ascorbic acid. Microcantilever sensors were fabricated and coated with the polysaccharide chit...
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Some applicants, developers, and commercial-off-the-shelf (COTS) software vendors have proposed reverse engineering as an approach for satisfying RTCA/DO-178B objectives for airborne software. RTCA/DO-178B, Software C...
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Some applicants, developers, and commercial-off-the-shelf (COTS) software vendors have proposed reverse engineering as an approach for satisfying RTCA/DO-178B objectives for airborne software. RTCA/DO-178B, Software Considerations in Airborne systems and Equipment Certification, serves as the means of compliance for most airborne software in civil aircraft. DO-178B defines reverse engineering as "the method of extracting software design information from the source code" and provides guidance particular to reverse engineering, when it is used to upgrade a development baseline. For purposes of this paper, reverse engineering is an approach for creating software life cycle data that did not originally exist, cannot be found, is not adequate, or is not available to a developer in order to meet applicable DO-178B objectives. Reverse engineering is not just the generation of data-rather it is a process to assure that the data is correct, the software functionality is understood and well documented, and the software functions as intended and required by the system. Reverse engineering is not, as some software developers propose, just an effort to generate the software life cycle data without intent to build in quality and the resulting design assurance. This paper explores reverse engineering in airborne software projects, by explaining a definition for the certification domain, describing the motivation for its use, and documenting the certification concerns. Two actual cases of reverse engineering are also described to illustrate the certification concerns in real projects.
Enhancement of light extraction in a GaInN light-emitting diode employing a conductive omnidirectional reflector consisting of GaN, an indium-tin oxide nanorod low-refractive-index layer, and an Ag layer is presented....
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This paper presents an ontology modeling and engineering approach to semantic description and integration of product development processes. Using OWL and OWL-S, the proposed method formalizes the underlying semantic r...
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This paper presents an ontology modeling and engineering approach to semantic description and integration of product development processes. Using OWL and OWL-S, the proposed method formalizes the underlying semantic representations of the product development process in domain object ontologies and the generic problem solving structures in domain task ontologies. Both the domain object and task ontologies are incorporated in the OWL-S based application service ontologies to facilitate the semantic process description and semantic service discovery, composition in the integration of product development processes. The approach has been applied to the development of ontological models for the consumer product development process in a pilot project of a national research program in Singapore namely the Integrated Manufacturing and Service systems (IMSS).
This paper addresses methodic implementation of a credible ISHM capability for elements of Constellation systems. ISHM capability must be implemented by a combination of on-board and ground elements, each contributing...
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ISBN:
(纸本)1563478188
This paper addresses methodic implementation of a credible ISHM capability for elements of Constellation systems. ISHM capability must be implemented by a combination of on-board and ground elements, each contributing to determining the health of systems in the most effective manner. Implementation of ISHM capability must evolve continuously to reach higher and higher levels of functional capability. The implication is that a sustainable approach must be defined in order to accomplish a believable capability. This paper describes the methodology, the elements, and the technology to implement ISHM capability throughout the life cycle of elements of Constellation systems, reaching beyond individual elements that might have a limited life while the constellation moves on.
This paper proposes a new high-speed reclosing operation method to improve the stability in power system with the fault current limiter. From an angular velocity, a field system voltage and a phase of the generator, t...
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ISBN:
(纸本)0889865868
This paper proposes a new high-speed reclosing operation method to improve the stability in power system with the fault current limiter. From an angular velocity, a field system voltage and a phase of the generator, the proposed operation method calculates the optimum reclosing time domain. The fault current limiter is used the reactance type or the resistive type. The examination was carried out using the Inst. of Electrical Engineers of Japan one-machine infinite bus system model in order to demonstrate the effectiveness of the proposed method. The Impact Ver2.3 was used in the computer simulation.
Enhancement of light extraction in a GaInN light-emitting diode employing a conductive omnidirectional reflector consisting of GaN, an indium-tin oxide nanorod low-refractive-index layer, and an Ag layer is presented.
ISBN:
(纸本)1557528136
Enhancement of light extraction in a GaInN light-emitting diode employing a conductive omnidirectional reflector consisting of GaN, an indium-tin oxide nanorod low-refractive-index layer, and an Ag layer is presented.
In this paper the authors propose a structural method for a genetic algorithm (GA) for the optimization problem of cable routing in which cables have to be laid optimally. When there are no limits on the layout routes...
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