Ron Oliver is a Senior Lecture( in the Deparlnent of Library and lnfomatton Sctence at Edith Cowan Univercity, He teaches in the prc.setvice teacher education program at the Univercity. He cootdtnates the secondary teachet computet education Wogram. He is actively tnvolved in school-based research and has a paqiculat nterest in the outcones of lT programs n schools. He $ curcntly nvalved in a p...

I discuss the behaviour of algorithms for dynamical fermions as the sea-quark mass decreases. I focus on the Hybrid-Monte-Carlo (HMC) algorithm applied to two degenerate flavours of Wilson fermions. First, I briefly review the performance obtained in large scale HMC simulations. Then I discuss a modified pseudo-fermion action for the HMC simulation that has been introduced three years ago. I su...

We discuss our implementation of dynamical Ginsparg-Wilson type fermions using a stoutsmeared chirally improved Dirac operator. Such operators have been studied extensively in quenched calculations within the Bern-Graz-Regensburg (BGR) collaboration. Here we discuss the development and testing of the Hybrid Monte Carlo algorithm with this Dirac operator. We study the chiral properties of this o...

We discuss our implementation of dynamical Ginsparg-Wilson type fermions using a stoutsmeared chirally improved Dirac operator. Such operators have been studied extensively in quenched calculations within the Bern-Graz-Regensburg (BGR) collaboration. Here we discuss the development and testing of the Hybrid Monte Carlo algorithm with this Dirac operator. We study the chiral properties of this o...

This is the write-up of three lectures on algorithms for dynamical fermions that were given at the ILFTN workshop ‘Perspectives in Lattice QCD’ in Nara during November 2005. The first lecture is on the fundamentals of Markov Chain Monte Carlo methods and introduces the Hybrid Monte Carlo (HMC) algorithm and symplectic integrators; the second lecture covers topics in approximation theory and the...

This note discusses proofs for convergence of first-order methods based on simple potentialfunction arguments. We cover methods like gradient descent (for both smooth and non-smooth settings), mirror descent, and some accelerated variants.

This paper discusses optical beam control using adaptive optics for imaging spacecraft with large aperture telescopes. The segmented mirror alignment and active mirror surface control are achieved by novel wavefront sensing and control techniques. The experimental testbed and test results are also presented to demonstrate the adaptive optics techniques for large-aperture segmented mirrors.

This paper considers the p-Laplacian PDE for p = 1,∞ and some interesting new game theoretic interpretations, due to Kohn–Serfaty [K-S] and to Peres–Schramm–Sheffield–Wilson [P-S-S-W].

We define the thin fundamental categorical group P2(M, ∗) of a based smooth manifold (M, ∗) as the categorical group whose objects are rank-1 homotopy classes of based loops on M , and whose morphisms are rank2 homotopy classes of homotopies between based loops on M . Here two maps are rank-n homotopic, when the rank of the differential of the homotopy between them equals n. Let C(G) be a Lie c...

Mirror descent with an entropic regularizer is known to achieve shifting regretbounds that are logarithmic in the dimension. This is done using either a carefullydesigned projection or by a weight sharing technique. Via a novel unified analysis,we show that these two approaches deliver essentially equivalent bounds on a no-tion of regret generalizing shifting, adaptive, discount...