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Publicatii proprii
An assay for pro-oxidant reactivity based on phenoxyl radicals generated by laccase
A transient species may be detected with UV-vis and EPR spectroscopy during turnover of a laccase with quercetin; this species is assigned as a quercetin-derived radical, based on EPR spectra as well the observed UV-vis similarities (a 540. nm centred band) with previously reported data. The rates of formation and decay of this species correlate well (. r=. 0.9946) with the pro-oxidant reactivity manifested by flavonoids in the presence of laccase.
Read moreThe Biometric Menagerie – A Fuzzy and Inconsistent Concep
This paper proves that in iris recognition, the concepts of sheep, goats, lambs and wolves - as proposed by Doddington and Yager in the socalled Biometric Menagerie, are at most fuzzy and at least not quite well defined. They depend not only on the users or on their biometric templates, but also on the parameters that calibrate the iris recognition system. This paper shows that, in the case of iris recognition, the extensions of these concepts have
Read moreExamples of Artificial Perceptions in Optical Character Recognition and Iris Recognition
This chapter assumes the hypothesis that human learning is perception based, and consequently, the learning process and perceptions should not be represented and investigated independently or modeled in different simulation spaces. In order to keep the analogy between the artificial and human learning, the former is assumed here as being based on the artificial perception. Hence, instead of choosing to apply or develop a Computational Theory of (human)
Read moreDesigning and continuous extrusion forming of Al-Mg-Si contact lines for electric railway
The experimental work aimed to obtaining the aluminum alloy contact lines for trams or light rail. For this purpose was elaborated AlMgSi0.5 Aluminum alloy was elaborated and semi-continuous casted into rods of f 175 x 6000 mm, and then homogenized (520° C / for 16 hours) for the continuous extrusion process. A chamber extrusion die was designed and executed. After continuous extrusion forming, the obtained contact wire has been heat treated (quenching
Read moreA novel exploratory chemometric approach to environmental monitorring by combining block clustering with Partial Least Square (PLS) analysis
Given the serious threats posed to terrestrial ecosystems by industrial contamination, environmental monitoring is a standard procedure used for assessing the current status of an environment or trends in environmental parameters. Measurement of metal concentrations at different trophic levels followed by their statistical analysis using exploratory multivariate methods can provide meaningful information on the status of environmental quality. In
Read moreHow Does Earth Maintain the Stability of its Rotation Motion?: An Irreversible Thermodynamics Approach
This paper proposes to provide a physical description of how the Earth achieves the stability of its rotation motion. We demonstrate that Earth is a self-organizing system due to its complexity levels, which are structured according to the ergodic theorem. As a self-organizing system the Earth generates all the negative feedbacks necessary to reach the near to equilibrium state. We focus on the Earth's rotation as this can be more easily perturbed
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