Peter Harrison

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Very large Markov chains often arise from stochastic models of complex real-life systems. In this paper we investigate disk-based techniques for solving such Markov chains on a distributed-memory parallel computer. We focus on two scalable numerical methods, namely the Jacobi and Conjugate Gradient Squared (CGS) algorithms. The critical bottleneck in these(More)
A hidden Markov model (HMM) is a bivariate Markov chain which encodes information about the evolution of a time series. HMMs can faithfully represent work-loads for discrete time processes and therefore be used as portable benchmarks to explain and predict the complex behaviour of these processes. This project introduces the main concepts of HMMs for(More)
We report results from the analysis of traffic measured over a departmental switched Ethernet. Self-similar characteristics are seen throughout the network, for example at the compute servers, web server and intermediate routers. We show that data shipped by the web server (i.e. including both static files from a filer server and dynamically-generated data)(More)
One of the language features of the core language of HPF 2.0 is the HPF Library. The HPF Library consists of 55 generic functions. The implementation of this library presents the challenge that all data types, data kinds, array ranks and input distributions need to be supported. For instance, more than 2 billion separate functions are required to support(More)
  • Jean Mukherjee, Chase McCann, Kwasi Ofori, Julia Hill, Karen Baldwin, Charles B. Shoemaker +2 others
  • 2012
Botulinum neurotoxin (BoNT) is responsible for causing botulism, a potentially fatal disease characterized by paralysis of skeletal muscle. Existing specific treatments include polyclonal antisera derived from immunized humans or horses. Both preparations have similar drawbacks, including limited supply, risk of adverse effects and batch to batch variation.(More)
Musical abilities and active engagement with music have been shown to be positively associated with many cognitive abilities as well as social skills and academic performance in secondary school students. While there is evidence from intervention studies that musical training can be a cause of these positive relationships, recent findings in the literature(More)