Encontrados 12 documentos, a visualizar página 1 de 2
Brachiaria spp. poisoning of ruminants in Brazil
Riet-Correa,B.; Castro,M.B.; Lemos,R.A.; Riet-Correa,G.; Mustafa,V.; Riet-Correa,F.Brachiaria species are the most important grasses for cattle production in Brazil. However, a limiting factor for the use of Brachiaria spp. is their toxicity. Most outbreaks of hepatogenous photosensitization are caused by B. decumbens; however B. brizantha, B. humidicola and B. ruziziensis can also cause poisoning. The poisoning affects cattle, sheep, goats and buffalo. Sheep are more susceptible than other a...
Transponder for Coarse Wavelength Division Multiplexing (CWDM) Optical Communic...
V. Barbosa; A. N. Pinto; C. Lemos; R. M. Diz; N. J. CarvalhoIn this paper a CWDM bi-directional opticaltransponder is described. This transponder was built in theframework of the project SIRAC. The design optionsfollowed are detailed discussed. This paper also discusses thepossible extension of the transponder to Dense WavelengthDivision Multiplexing (DWDM) systems.Znda Terms - Optical Transponder, CWDM Systems,DWDM Systems, FEC. ; Neste artigo é feita a descri&...
Subjective outcome of reconstruction of the adult acquired neurological equinov...
Lemos, R.; Pereira, A.Abstract A retrospective study was done of the subjective outcome of surgical correction of a spastic equinovarus foot deformity in 27 adult patients with acquired spastic hemiplegia. The mean age of the patients was 49 years and the mean follow-up period was 29 months. The patients were submitted to individualized soft-tissue surgery intended to correct their deformities and rebalance the affected joints, and ...
Pragas quarentenárias que ameaçam a cultura da mangueira no Brasil.
BARBOSA, F. R.; PARANHOS, B. D. A. G.; SA, L. A. N. de; LEMOS, R. N. S.; SILVA, R. A. D.2008
Pragas quarentenárias ameaçam manga.
BARBOSA, F. R.; LEMOS, R. N. S. de.2008
Inequalities for J-Hermitian matrices
Bebiano, N.; Nakazato, H.; Providência, J. da; Lemos, R.; Soares, G.Indefinite versions of classical results of Schur, Ky Fan and Rayleigh-Ritz on Hermitian matrices are stated to J-Hermitian matrices, J = Ir [circle plus operator] -In - r, 0 < r < n). Spectral inequalities for the trace of the product of J-Hermitian matrices are presented. The inequalities are obtained in the context of the theory of numerical ranges of linear operators on indefinite inner product sp...
Inequalities for quantum relative entropy
Bebiano, N.; Lemos, R.; Providência, J. daSome logarithmic trace inequalities involving the notions of relative entropy are reobtained from a log-majorization result. The thermodynamic inequality is generalized and a chain of equivalent statements involving this inequality and the Peierls-Bogoliubov inequality is obtained. ; http://www.sciencedirect.com/science/article/B6V0R-4CPM5VG-2/1/d98926b2da1f2e0c291953700e9a24db
On the geometry of numerical ranges in spaces with an indefinite inner product
Bebiano, N.; Lemos, R.; Providência, J. da; Soares, G.Geometric properties of the numerical ranges of operators on an indefinite inner product space are investigated. In particular, classes of matrices are presented such that the boundary generating curves of the J-numerical range are hyperbolical. The curvature of the J-numerical range at a boundary point is studied, generalizing results of Fiedler on the classical numerical range. ; http://www.sciencedirect.c...
Numerical ranges of unbounded operators arising in quantum physics
Bebiano, N.; Lemos, R.; Providência, J. daCreation and annihilation operators are used in quantum physics as the building blocks of linear operators acting on Hilbert spaces of many body systems. In quantum physics, pairing operators are defined in terms of those operators. In this paper, spectral properties of pairing operators are studied. The numerical ranges of pairing operators are investigated. In the context of matrix theory, the results give th...
Matrix inequalities in Statistical Mechanics
Bebiano, N.; Providência Jr., J. da; Lemos, R.Some matrix inequalities used in statistical mechanics are presented. A straightforward proof of the Thermodynamic Inequality is given and its equivalence to the Peierls–Bogoliubov inequality is shown.
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