Rough surface backscatter and statistics via extended parabolic integral equation

This paper extends the parabolic integral equation method, which is very effective for forward scattering from rough surfaces, to include backscatter. This is done by applying left-right splitting to a modified two-way governing integral operator, to express the solution as a series of Volterra operators; this series describes successively higher-order surface interactions between forward and backward going components, and allows highly efficient numerical evaluation. This and equivalent methods such as ordered multiple interactions have been developed for the full Helmholtz integral equations, but not previously applied to the parabolic Green's function. In addition, the form of this Green's function allows the mean field and autocorrelation to be found analytically to second order in surface height. These may be regarded as backscatter corrections to the standard parabolic integral equation method

Developing web services in a computational grid environment

Grid and Web services are both hot topics today. In this paper, we will present some ongoing work and planned future work at the Cambridge eScience Centre. After an introduction to these technologies in the context of Grid applications development, we describe two use-cases: a database of results in computational fluid dynamics (CFD) and a small computational Grid for aircraft engineering design. As Grid services are moving towards Web services, we continue to make use of the Globus Toolkit v2.4 (GT2.4), without adopting the Open Grid Services Architecture (OGSA) wholesale. In our scenario, GT2.4 integrates distributed computing resources including HPC and clusters while Web services wrap the scientific code as a service.Proceedings of the IEEE International Conference on Services Computing, Shanghai, September 200

Small business participation in the advanced technology program research alliances

This study uses a database of small businesses that participated in the US Department of Commerce's Advanced Technology Program (ATP) to observe the role of research alliances in undertaking high-risk technology research and development. The initial hypothesis is that small businesses benefit from membership in research alliances. This study examines two forms of research alliances: single applicants with subcontractor(s) and membership in a joint venture. The basis for the analysis includes data collected during the term of the project. Using data collected at project end provides a limited view of success as commercial achievements may come much later, and small businesses may derive advantages from participating in alliances not captured in the variables used. In light of this, the findings point to successful participation in ATP for small businesses as being dependent upon the type of organizational structure chosen as well as the role played by the small business in the research alliance. For example, assuming the role of the joint venture lead contributed to more successful technical and business outcomes

Visualisation and Grid applications of electromagnetic scattering from aircraft

Proceedings of the 2003 UK e-Science All Hands Meeting, 31st August - 3rd September, Nottingham UKElectromagnetic scattering behaviour plays a central role in the design of aircraft and other complex structures. This paper describes progress on visualisation tools in this area and on initial development of a web portal to enable scientists at remote locations to collaborate

From Hillary Clinton to Lady Macbeth: Or, Historicizing Gender, Law, and Power Through Shakespeare\u27s Scottish Play

Female rule was anomalous in the sixteenth century, therefore, Elizabeth I developed a complex set of symbols, rooted in claims traditionally made by male rulers, to legitimate her claim to rule. Nonetheless, her reign was anxiety-provoking, and this article argues that the years after her death saw a backlash against female power. Part of this backlash consisted of the reworking of the symbols Elizabeth had used. This article examines this process of revision in Shakespeare\u27s play Macbeth and, later, in the responses of King James I to claims of demonic possession. This article draws together three historical moments - Queen Elizabeth\u27s role in the trial of Mary, Queen of Scots; Shakespeare\u27s rewriting of the female ruler\u27s conscience in Lady Macbeth; and King James\u27s response to claims of demonic possession - to analyze a period when the female body was redefined in ways that continue to animate the law today. This connection to modern jurisprudence is especially prevalent in the areas of reproductive rights and fetal protection law. This article shows that the idea of the female body as merely biological and lacking in a subjectivity comparable to the male body originated in part in early seventeenth-century England