Jeffrey G. Fletcher

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The numerous time synchronization performance requirements in the Smart Grid necessitate a set of common metrics and test methods. The test methods help to verify the ability of the network system and its components to meet the power industry's accuracy, reliability and interoperability criteria for next-generation substations. In order to develop viable(More)
With the increasing use of Ethernet for real-time control of distributed dynamic systems, and inexpensive processing power at the sensor and actuator nodes, there is a growing interest in the process control community to move towards “model based” distributed control. Prior work shows that the lack of precise time synchronization is a critical(More)
In 1995/6, while conducting a quality assurance evaluation in a residential group home for adults with a learning disability, the subject of breast screening and the importance of early detection of breast abnormalities was raised by a member of staff. At the time, the Mulberry Trust had a quality standard that women between 50 and 64 years who are(More)
also helped with the initial conceptualization of the framework presented in this brief. Amy Mazzariello and Doug Slater provided thoughtful editorial assistance. conducts research on the major issues affecting community colleges in the United States and contributes to the development of practice and policy that expands access to higher education and(More)
Let us know how access to this document benefits you. Abstract Electricity service providers (ESP) worldwide have increased their interest in the use of electrical distribution, transmission, generation, storage, and responsive load resources as integrated systems. Referred to commonly as " smart grid, " their interest is driven by widespread goals to(More)
The selection of equipment for pressure sore prevention and management is extremely complex, with many variables to consider. There is a considerable lack of data to support the use of individual pieces of equipment, and so additional criteria need to be considered. A logical approach, taking into account the objectives of treatment, the modality of action,(More)
This is the first of two articles which consider the practical difficulties in selecting pressure-relieving devices for patients. The selection of pressure-relieving equipment has become increasingly difficult as the number of commercially available products rises. This article reviews the modes of action of the equipment, including alternating pressure and(More)
The opinions expressed are those of the authors and do not represent views of the Institute or the U.S. Department of Education. We thank all those at the Community College Research Center who helped us think through and revise our work. Any errors are our own. Abstract Using detailed administrative data from Virginia, this paper examines how and why the(More)
This is the second article in a two-part series. The first article reviewed the mode of action of the different types of equipment. This article examines some of the evidence behind the design and suggests selection criteria to assist when choosing individual items of pressure-relieving equipment. By presenting a broader view it is hoped to guide the reader(More)
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