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An adaptive noise cancellation scheme for speech processing is proposed. In this, the adaptive filters are implemented in frequency-limited sub-bands, based on a simplified model of the human cochlea. A modification to the basic LMS structure is introduced which guarantees stability and convergence at all times. This modification, a non-recursive normalisation, is used both in a wideband and in a...
The current economic architecture of the Internet resembles more an Oligopoly-with several very large organisations dominating-than the idealised free market that many thought the Internet's characteristics-high non-local connectivity and low technical barriers to entry would enable. Internet-based individual and SME entrepreneur ship, as well as peer-to-peer markets, remain a poorly supported and...
In this paper, we describe the challenges faced when conducting large-scale adverse drug reaction (ADR) studies by mining large-scale primary care databases. We provide a high-level view of the design of a generic informatics infrastructure that is needed to address such challenges. We also present our realization of such an infrastructure using a re-usable workflow-based e-Science middleware, and...
The success of Web services has influenced the way in which Grid applications are being written. Web services are increasingly used as a means to realise service-oriented distributed computing. Grid users often submit their applications in the form of workflows with certain Quality of Service (QoS) requirements imposed on the workflows. These workflows detail the composition of Web services and the...
The Imperial College e-Science Networked Infrastructure (ICENI) has been developed by the London e-Science Centre for over four years. ICENI has prototyped many novel ideas for providing an end to end Grid middleware. This has included: service-oriented architecture, component programming model, retaining and using metadata collected throughout the life-cycle of an application, and scheduling algorithms...
As Grid technology evolves, the ability to carry out processing on remote resources owned by different organizations becomes more feasible. We present an architecture, based on a set of Web services that allows remote execution of software services on an early prototype of commercial pay-peruse utility computing resources. The architecture and the services we have developed manage the complete execution...
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