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Channel capacity analysis of 2D barcodes: QR Code and CQR Code-5
TLDR
We show that the QR Code and CQR Code-5 data storage and retrieval is an asymmetric and no erasure channel of information transmission, where each two-dimensional barcode channel counts with maximum number of distinguishable symbols. Expand
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The IMGC/CENAM-HG6 mercury manobarometer
The Centro Nacional de Metrolog?a (CENAM, Mexico) has established a national primary standard for barometric pressure based on a mercury column and a laser interferometer, the first in this range inExpand
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Realization of the medium and high vacuum primary standard in CENAM, Mexico
A medium and high vacuum primary standard, based on the static expansion method, has been set up at Centro Nacional de Metrolog?a (CENAM), Mexico. This system has four volumes and covers a measuringExpand
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A cued-recall and emotion classification graphical password authentication scheme
TLDR
This paper presents an alternative visual authentication scheme with two secure layers for desktops or laptops. Expand
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Semi-parametric procedures for Unit root and fractional cointegration tests
This paper considers the use of the long-memory, semi-parametric estimators to test unit-root and non-cointegrated processes under fractional alternatives. Critical-point values of the proposed testsExpand
PERFIL SOCIOCULTURAL DOS CANDIDATOS AOS CURSOS DA ÁREA DE ENGENHARIA NO VESTIBULAR DA UFF 2011
Os cursos de Engenharia sao de extrema importância para o pais e para melhorar as condicoes de vida da populacao em geral, e exigem dos alunos bons conhecimentos em ciencias exatas. A preocupacaoExpand
Action Principles of Cosolvent Additives in Ethanol−Diesel Blends: Stability Studies
In order to increase the solubility of ethanol in diesel, it is necessary to introduce an additive which improves the solubility in a more stable way, especially in low temperatures and when exposedExpand
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