33,195 research outputs found
W and Z Production at the Tevatron
In this paper, recent experimental results on W and Z boson production at the
Tevatron are described. These results not only provide tests of the standard
model, but are also sensitive to proton parton distribution functions.Comment: Presented at the XXXIII International Conference on High Energy
Physics, Moscow, Russian Federation, 26th July - 2nd August 200
Attitudes towards waste minimisation amongst labour only sub-contractors
Waste generation by the construction industry is a significant issue for the industry and for society generally. The paper examines previous studies of attitudes to waste management within the industry and by means of a small questionnaire study sets out to examine: the extent of labour only sub-contractors’ awareness and understanding of waste as an issue, their perceptions of the causes of waste and their attitudes towards the allocation of financial responsibility for waste minimisation. The survey shows that the results of previous studies can be extended to labour only sub-contractors and it identifies a willingness, beyond what might have been anticipated for this group, to accept some of the costs of waste reduction
A Definition of Metastability for Markov Processes with Detailed Balance
A definition of metastable states applicable to arbitrary finite state Markov
processes satisfying detailed balance is discussed. In particular, we identify
a crucial condition that distinguishes genuine metastable states from other
types of slowly decaying modes and which leads to properties similar to those
postulated in the restricted ensemble approach \cite{pen71}. The intuitive
physical meaning of this condition is simply that the total equilibrium
probability of finding the system in the metastable state is negligible. As a
concrete application of our formalism we present preliminary results on a 2D
kinetic Ising model.Comment: 5 pp. 1 Figure, presented in News, Expectations and Trends in
Statistical Physics-3rd International Conference, 13-18 August 2005,
Kolymbari Cret
Memetic Multilevel Hypergraph Partitioning
Hypergraph partitioning has a wide range of important applications such as
VLSI design or scientific computing. With focus on solution quality, we develop
the first multilevel memetic algorithm to tackle the problem. Key components of
our contribution are new effective multilevel recombination and mutation
operations that provide a large amount of diversity. We perform a wide range of
experiments on a benchmark set containing instances from application areas such
VLSI, SAT solving, social networks, and scientific computing. Compared to the
state-of-the-art hypergraph partitioning tools hMetis, PaToH, and KaHyPar, our
new algorithm computes the best result on almost all instances
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