20,576 research outputs found
SWKB Quantization Rules for Bound States in Quantum Wells
In a recent paper by Gomes and Adhikari (J.Phys B30 5987(1997)) a matrix
formulation of the Bohr-Sommerfield quantization rule has been applied to the
study of bound states in one dimension quantum wells. Here we study these
potentials in the frame work of supersymmetric WKB (SWKB) quantization
approximation and find that SWKB quantization rule is superior to the modified
Bohr-Sommerfield or WKB rules as it exactly reproduces the eigenenergies.Comment: 8 page
Laboratorio sobre patogenos microbiales: postulados de Koch, tecnicas de aislamiento, inoculacion y verificacion de sintomas externos.
Internal relaxation time in immersed particulate materials
We study the dynamics of the solid to liquid transition for a model material
made of elastic particles immersed in a viscous fluid. The interaction between
particle surfaces includes their viscous lubrication, a sharp repulsion when
they get closer than a tuned steric length and their elastic deflection induced
by those two forces. We use Soft Dynamics to simulate the dynamics of this
material when it experiences a step increase in the shear stress and a constant
normal stress. We observe a long creep phase before a substantial flow
eventually establishes. We find that the typical creep time relies on an
internal relaxation process, namely the separation of two particles driven by
the applied stress and resisted by the viscous friction. This mechanism should
be relevant for granular pastes, living cells, emulsions and wet foams
Danos de Deois flavopicta em diferentes cultivares de braquiária no sistema integrado de produção com milho.
Position-dependent-mass; Cylindrical coordinates, separability, exact solvability, and PT-symmetry
The kinetic energy operator with position-dependent-mass in cylindrical
coordinates is obtained. The separability of the corresponding Schr\"odinger
equation is discussed within radial cylindrical mass settings. Azimuthal
symmetry is assumed and spectral signatures of various z-dependent interaction
potentials (Hermitian and non-Hermitian PT-symmetric) are reported.Comment: 16 page
The efficiency of Leguminoceae Production Grains Plus Maize as A Feeding on Growth Phase of Local Swine (Potamochoerus porcus) in Timor-Leste
In Timor Leste, swine Farmers did not yet use legume production grains to maintain feed swine performance and respond to market demand. The research aims to evaluate the Efficiency of Leguminoceae Production grains Plus Maize in feeding on the Growth Phase of Local Swine in Timor Leste. This research used Latin Square Design with four rows and four columns employed. The swine feeding has 4 treatments such as R1 (corn 50% + mungbean 15% + soybean 20% + common bean 15%), R2 (corn 40% + mungbean 20% + soybean 15% + common bean 25%), R3 (corn 40% + mungbean 20% + soybean 20% + common bean 20%), R4 (corn 50% + mungbean 10% + soybean 15% + common bean 25%). This research showed that Swine that consumed R2 rates were very good compared to other feedings for Swine. Look at the performance of the Swine with an increase in body weight of 31.16kg and body length of 72.75cm in the grower phase. All data were analyzed by ANOVA Latin Square Design, and Least Significance Difference (LSD) was conducted when the means were significantly different (p<0.05)
Seletividade do inseticida Danimen (Fenpropathrin, 300 G/L) para Campoletis flavicincta e Doru luteipes, inimigos naturais de Spodoptera frugiperda.
Aspectos biológicos de Coleomegilla maculata criadas com pulgão -verde do sorgo, Schizaphis graminum.
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