10,398 research outputs found
As condições ambientais e a planta podem influenciar a aquisição e a transmissão de fitoplasma por Dalbulus maidis.
bitstream/item/51777/1/circ-168.pd
Definição de protocolos de extração de DNA para as espécies nativas da Floresta Atlântica.
Resumo 12
Uso de óleo mineral como estratégia de conservação de germoplasma in vitro DE Piper aduncum L. E Piper hispidinervum C. DC.
Emprego de marcadores moleculares na caracterização genética de espécies nativas da Mata Atlântica.
Organizado por Patricia Póvoa de Mattos, Celso Garcia Auer, Rejane Stumpf Sberze, Katia Regina Pichelli e Paulo César Botosso
Informações sobre as cultivares de trigo recomendadas para plantio em 1992, no Rio Grande do Sul.
bitstream/item/119427/1/FOL-05083.pd
Improving multivariate data streams clustering.
Clustering data streams is an important task in data mining research. Recently, some algorithms have been proposed to cluster data streams as a whole, but just few of them deal with multivariate data streams. Even so, these algorithms merely aggregate the attributes without touching upon the correlation among them. In order to overcome this issue, we propose a new framework to cluster multivariate data streams based on their evolving behavior over time, exploring the correlations among their attributes by computing the fractal dimension. Experimental results with climate data streams show that the clusters' quality and compactness can be improved compared to the competing method, leading to the thoughtfulness that attributes correlations cannot be put aside. In fact, the clusters' compactness are 7 to 25 times better using our method. Our framework also proves to be an useful tool to assist meteorologists in understanding the climate behavior along a period of time.Edição dos Proceedings do 16th International Conference on Computational Science, San Diego, 2016
Dirac fields in the background of a magnetic flux string and spectral boundary conditions
We study the problem of a Dirac field in the background of an Aharonov-Bohm
flux string. We exclude the origin by imposing spectral boundary conditions at
a finite radius then shrinked to zero. Thus, we obtain a behaviour of
eigenfunctions which is compatible with the self-adjointness of the radial
Hamiltonian and the invariance under integer translations of the reduced flux.
After confining the theory to a finite region, we check the consistency with
the index theorem, and evaluate its vacuum fermionic number and Casimir energy.Comment: 9 pages, 1 figure Two references added To be published in
International Journal of Modern Physics
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