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Influence of age, sex and breeding status on mercury accumulation patterns in t...
Tavares, S.; Xavier, J. C.; Phillips, R. A.; Pereira, M. E.; Pardal, M. A.Although mercury bio-amplifies through the food chain and accumulates in top predators, mercury concentrations in tissues of the wandering albatross are greater than in any other vertebrate, including closely related species. In order to explore the alternative explanations for this pattern, we measured total mercury concentrations in feathers, plasma and blood cells of wandering albatrosses of known age, sex a...
A simple way to avoid metastable configurations in the density-matrix renormali...
Xavier,J. C.We use the spin-1 Heisenberg chain with periodic boundary conditions to ilustrate that the systems get stuck in metastable configurations only when the density-matrix renormalization-group algorithm start with small number of states m. We also show that the convergence of the energies have a huge improvement if we start the algorithm with a large number of states m.
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