25,056 research outputs found
Produtividade do araçá-vermelho (Psidium cattleyanum L.) em pomar de seis anos sob manejo ecológico.
Editado por Ivan Rodrigues de Almeida, Leonardo Ferreira Dutra e Jamir Luis Silva da Silva. 1 CD-ROM
Produtividade do araçá-amarelo (Psidium cattleyanum L.) em sistema de produção ecológico aos seis anos da implantação.
Editado por Ivan Rodrigues de Almeida, Leonardo Ferreira Dutra e Jamir Luis Silva da Silva. 1 CD-ROM
Physiological responses of pirarucu (Arapaima gigas) to acute handling stress.
O pirarucu (Arapaima gigas) é um peixe de respiração aérea obrigatória da bacia Amazônica. Estudo prévio demonstrou que juvenis de pirarucu apresentam um período de latência em sua resposta de estresse a um estresse moderado (transporte). Desta forma, o objetivo deste estudo foi verificar os efeitos de uma exposição aérea prolongada no lactato, glicose, cortisol, hematócrito, hemoglobina e glicogênio do fígado em pirarucu
Counting solutions from finite samplings
We formulate the solution counting problem within the framework of inverse
Ising problem and use fast belief propagation equations to estimate the entropy
whose value provides an estimate on the true one. We test this idea on both
diluted models (random 2-SAT and 3-SAT problems) and fully-connected model
(binary perceptron), and show that when the constraint density is small, this
estimate can be very close to the true value. The information stored by the
salamander retina under the natural movie stimuli can also be estimated and our
result is consistent with that obtained by Monte Carlo method. Of particular
significance is sizes of other metastable states for this real neuronal network
are predicted.Comment: 9 pages, 4 figures and 1 table, further discussions adde
Plastic Deformation of 2D Crumpled Wires
When a single long piece of elastic wire is injected trough channels into a
confining two-dimensional cavity, a complex structure of hierarchical loops is
formed. In the limit of maximum packing density, these structures are described
by several scaling laws. In this paper it is investigated this packing process
but using plastic wires which give origin to completely irreversible structures
of different morphology. In particular, it is studied experimentally the
plastic deformation from circular to oblate configurations of crumpled wires,
obtained by the application of an axial strain. Among other things, it is shown
that in spite of plasticity, irreversibility, and very large deformations,
scaling is still observed.Comment: 5 pages, 6 figure
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