34,100 research outputs found
Diquark Representations for Singly Heavy Baryons with Light Staggered Quarks
In the staggered fermion formulation of lattice QCD, we construct diquark
operators which are to be embedded in singly heavy baryons. The group
theoretical connections between continuum and lattice staggered diquark
representations are established.Comment: v1, 13 pages with title "Staggered Diquarks for Singly Heavy
Baryons"; v2, 4 pages in revtex, changed the title to be more specifi
Benchmarking and tuning the MILC code on clusters and supercomputers
Recently, we have benchmarked and tuned the MILC code on a number of
architectures including Intel Itanium and Pentium IV (PIV), dual-CPU Athlon,
and the latest Compaq Alpha nodes. Results will be presented for many of these,
and we shall discuss some simple code changes that can result in a very
dramatic speedup of the KS conjugate gradient on processors with more advanced
memory systems such as PIV, IBM SP and Alpha.Comment: Lattice2001(algorithms) 4 pages, includes hep-lat references not in
published versio
Hedge Funds: Heading for a regulatory hard landing? ECMI Policy Brief No. 5, April 2007
This policy brief examines the evolution of the hedge fund industry, the industryâs structure and the prospect of regulatory steps looming on the horizon. In the wake of the recent bust of Amaranth and of the increased âretailisationâ of the industry, hedge funds have increasingly come under the close scrutiny of regulators. In this ECMI Policy Brief, Charles Gottlieb explores the economic rationale that should be kept in mind for any appropriate policy making in this area. He concludes by outlining the regulatory uncertainties remaining with binding the hedge fund industry together with MiFID and UCITS regulations
On ambitious higher-order theories of consciousness
ABSTRACTAmbitious Higher-order theories of consciousness â Higher-order theories that purport to give an account of phenomenal consciousness â face a well-known objection from the possibility of ra..
Cost-Effective Clustering
Small Beowulf clusters can effectively serve as personal or group
supercomputers. In such an environment, a cluster can be optimally designed for
a specific problem (or a small set of codes). We discuss how theoretical
analysis of the code and benchmarking on similar hardware lead to optimal
systems.Comment: 7 pages, 2 figures (one in color). Color version of paper to be
published as part of proceedings of CCP2000 (Brisbane) in a special isssue of
Computer Physics Communication
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