منابع مشابه
The order is rapidly fadin'.
I n this issue of the BJO (p 796), Egbert et al utilise a case-control design to demonstrate that onchocerciasis and glaucoma are associated in an area of Ghana. Perhaps this is not surprising, as onchocerciasis is known to cause anterior segment inflammation and peripheral anterior synechiae, which can in turn lead to increased intraocular pressure. However, this association had never really b...
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By causing extinctions and altering community structure, anthropogenic disturbances can disrupt processes that maintain ecosystem integrity. However, the relationship between community structure and ecosystem functioning in natural systems is poorly understood. Here we show that habitat loss appeared to disrupt ecosystem functioning by affecting extinction order, species richness and abundance....
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We consider phase field models with the objective of approximating sharp interface models. By using second order asymptotics in the interface thickness parameter, ε, we develop models in which the order ε term is eliminated, suggesting more rapid convergence to the ε = 0 (sharp interface) limit. In addition we use non-smooth potentials with a non-zero gradient at the roots. These changes result...
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Markov-chain Monte Carlo (MCMC) simulation is one of the most versatile and widely-used tools applied in statistical physics. In order for MCMC algorithms to be useful however, it is crucial that they converge rapidly to stationarity. A major breakthrough in the development of efficient MCMC algorithms for statistical-mechanical spin models was the invention of the Swendsen-Wang (SW) algorithm ...
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We prove that Broder’s Markov chain for approximate sampling near-perfect and perfect matchings is not rapidly mixing for Hamiltonian, regular, threshold and planar bipartite graphs, filling a gap in the literature. In the second part we experimentally compare Broder’s chain with the Markov chain by Jerrum, Sinclair and Vigoda from 2004. For the first time, we provide a systematic experimental ...
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ژورنال
عنوان ژورنال: British Journal of Ophthalmology
سال: 2005
ISSN: 0007-1161
DOI: 10.1136/bjo.2005.065847