62,683 research outputs found
The Accountability and Independence of the Auditors-General of Australia: A Comparison of their Enabling Legislation
This paper compares the enabling legislation of the nine auditors-general of Australia from perspectives of public-sector accountability and auditor independence. Following on from the Joint Committee of Public Accounts (JCPA) 1989 and 1996 reports, and in particular English and Guthrie (2000), this study finds general similarities in the enabling legislation for all auditors-general, and striking similarities between the legislation of the commonwealth and Victoria. The policy implications of this study's findings are that for all auditors-general provisions in their enabling legislation could be further strengthened
Testing Algorithms for Finite Temperature Lattice QCD
We discuss recent algorithmic improvements in simulating finite temperature
QCD on a lattice. In particular, the Rational Hybrid Monte Carlo(RHMC)
algorithm is employed to generate lattice configurations for 2+1 flavor QCD.
Unlike the Hybrid R Algorithm, RHMC is reversible, admitting a Metropolis
accept/reject step that eliminates the errors
inherent in the R Algorithm. We also employ several algorithmic speed-ups,
including multiple time scales, the use of a more efficient numerical
integrator, and Hasenbusch pre-conditioning of the fermion force.Comment: 4 pages, 2 figures, poster presented at International Conference on
Strong and Electroweak Matter 2006 (SEWM2006), BNL, May 10-13, 200
The RHMC Algorithm for 2 Flavours of Dynamical Staggered Fermions
We describe an implementation of the Rational Hybrid Monte Carlo (RHMC)
algorithm for dynamical computations with two flavours of staggered quarks. We
discuss several variants of the method, the performance and possible sources of
error for each of them, and we compare the performance and results to the
inexact R algorithm.Comment: Lattice2003(machine) 3 pages, 1 figure. Added referenc
The supercharge and superconformal symmetry for N=1 supersymmetric quantum mechanics
The superspace Lagrangian formulation of N=1 supersymmetric quantum mechanics
is presented. The general Lagrangian constructed out of chiral and antichiral
supercoordinates containing up to two derivatives and with a canonically
normalized kinetic energy term describes the motion of a nonrelativistic spin
1/2 particle with Land\'e g-factor 2 moving in two spatial dimensions under the
influence of a static but spatially dependent magnetic field. Noether's theorem
is derived for the general case and is used to construct superspace dependent
charges whose lowest components give the superconformal generators. The
supercoordinate of charges containing an R symmetry charge, the supersymmetry
charges and the Hamiltonian are combined to form a supercharge supercoordinate.
Superconformal Ward identities for the quantum effective action are derived
from the conservation equations and the source of potential symmetry breaking
terms are identified.Comment: 59 pages, LaTe
Algorithm Shootout: R versus RHMC
We present initial results comparing the RHMC and R algorithms on large
lattices with small quark masses using chiral fermions. We also present results
concerning staggered fermions near the deconfinement/chiral phase transition.
We find that the RHMC algorithm not only eliminates the step-size error of the
R algorithm, but is also considerably more efficient. We discuss several
possibilities for further improvement to the RHMC algorithm.Comment: Proceedings from Lattice 2005 (Dublin
On the Holomorphic Structure of a Low Energy Supersymmetric Wilson Effective Action
The Wilson (exact) renormalization group equations are used to determine the
evolution of a general low energy N=1 supersymmetric action containing a U(1)
gauge vector multiplet and a neutral chiral multiplet. The effective theory
evolves towards satisfying a fixed relation where the K\"ahler potential and
effective gauge coupling are obtained from a N=2 supersymmetric holomorphic
prepotential.Comment: 10 pages, LaTe
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