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On the impact of disproportional samples in credit scoring models: An application to a Brazilian bank data
(PERGAMON-ELSEVIER SCIENCE LTDOXFORD, 2012)
Statistical methods have been widely employed to assess the capabilities of credit scoring classification models in order to reduce the risk of wrong decisions when granting credit facilities to clients. The predictive ...
Use of thermal gradients for control of vortex matter in mesoscopic superconductors
(2019-07-11)
Usually, the measurements of electronic and magnetic properties of superconducting samples are carried out under a constant temperature bath. On the other hand, thermal gradients induce local variation of the superconducting ...
Modelagem de fraude em cartão de crédito
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Estatística - PPGEs, 2008-09-02)
The transactions volume increase brought the fraud increase, which result in a annual loss of billions of reais to all .nancial institutions in the world. Therefore, it.s very important the development of detection methods ...
Nonmonotonic excitation power dependence of the UV photoluminescence rate from large ZnO nanoparticle assemblies
(Elsevier, 2021-04)
The photoluminescence from solid-state ZnO nanoparticles (NPs) assemblies was studied as a function of the number on NPs in the assembly. With increasing number of NPs, the UV emission band broadened and redshifted, while ...
Light-intensity dependence of the steady-state photoconductivity used to estimate the density of states in the gap of intrinsic semiconductors
(Elsevier Science Sa, 2005-09)
We present a method to obtain the density of states of photoconductive semiconductors based on the light-intensity dependence of the steadystate photoconductivity. A simple expression—relating the density of states at the ...
SDDP for some interstage dependent risk-averse problems and application to hydro-thermal planning
(Springer, 2014-01)
We consider interstage dependent stochastic linear programs where both the random right-hand side and the model of the underlying stochastic process have a special structure. Namely, for equality constraints (resp. inequality ...
Preventing Chaotic Motion in Tapping-Mode Atomic Force Microscope
(2014-01-01)
During the last 30 years the Atomic Force Microscopy became the most powerful tool for surface probing in atomic scale. The Tapping-Mode Atomic Force Microscope is used to generate high quality accurate images of the samples ...
Preventing chaotic motion in tapping-mode atomic force microscope
(2014)
During the last 30 years the Atomic Force Microscopy became the most powerful tool for surface probing in atomic scale. The Tapping-Mode Atomic Force Microscope is used to generate high quality accurate images of the samples ...
Criticality of mostly informative samples: A Bayesian model selection approach
(IOP Publishing, 2015-10)
We discuss a Bayesian model selection approach to high-dimensional data in the deep under-sampling regime. The data is based on a representation of the possible discrete states s, as defined by the observer, and it consists ...
Biological markers of alcohol consumption in nondrinkers, drinkers, and alcohol-dependent Brazilian patients
(Lippincott Williams & Wilkins, 2002-07-01)
Background: the purpose of this study was to compare the sensitivity and specificity of some new and traditional biological markers and indicators of health among Brazilian nondrinkers, drinkers, and alcohol-dependent ...