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Cluj-Napoca, Romania

Muresan L.M.,Babes - Bolyai University | Blejan D.,Babes - Bolyai University | Indrea E.,INCDTIM Cluj Napoca
Studia Universitatis Babes-Bolyai Chemia | Year: 2010

The Zn-Ni alloys have been electrodeposited from an alkaline bath containing triethanolamine as complexing agent for Ni2+ ions. Polyethyleneglicol (PEG), in combination with either coumarin, piperonal or vanillin have been tested as brightening agents. Their effect on the codeposition process and on the corrosion resistance of the resulted coatings was investigated. Under the examined conditions, the electrodeposition was of anomalous type. The effect of plating bath conditions on the corrosion resistance was studied by Tafel polarization measurements. It was found that the tested compounds had a beneficial effect both on deposits quality and on their corrosion resistance. Source

Florin T.,INCDTIM Cluj Napoca | Mastorakis N.E.,Agiou Ioannou Theologou 17 23
WSEAS Transactions on Circuits and Systems | Year: 2010

The goal of this paper is to study how different TV technologies work, and to compare them. We analyze three different situations: a CRT monitor, a LCD monitor and a LEDs monitor. Using the different monitors' spectral power distributions, we propose a six steps spectral image processing algorithm which converts the spectral image in to XYZ standard and then in to the RGB standard. Finally we colour balance the RGB image in order to eliminate the monitors unwanted render colours hues. On the monitors displays we expect to see the same colours text image. Also we present the monitor's colours properties like: colours saturation, brightness, contrast and sharp. Source

Florin T.,INCDTIM Cluj Napoca | Mastorakis N.E.,Agiou Ioannou Theologou 17 23
WSEAS Transactions on Circuits and Systems | Year: 2010

The goal of this paper is to generate a laser pulse and to capture it by an image acquisition system. We use a confocal resonator to generate a laser pulse; then the generate light is focused in to an optical fiber using a lens; the light propagates through the fiber and at the fiber output light is projected on a CMOS sensor. We compute the PSF (point spread function) and MTF (modulation transfer function) in order to characterize the functionality of the lens and the optical part of a CMOS sensor. We analyze the CMOS electrical part considering the photon shot noise and the FPN (fixed pattern noise). Finally, we use a Lapacian filter, an amplitude filter and a bilateral filter in order to reconstruct the noisy blurred image. We consider the image capture system to be linear shift invariant, axial and the light is orthogonal to the system. Source

Florin T.,UT Cluj Napoca | Arsinte R.,INCDTIM Cluj Napoca | Mastorakis N.E.,Agiou Ioannou Theologou 17 23
International Conference on Visualization, Imaging and Simulation - Proceedings | Year: 2010

The goal of this paper is to analyze the daylight perception by the human eye and their adaptation to illumination. In order to do that we compute the spectral power distributions of the daylight, in function of these the color changes across the daylight. We simulate the perception of the daylight: in the sunset sky, the noon sunlight, the daylight etc. When the level of illumination is too high the iris makes prompt, momentary adjustments to changes in light intensity within the same light environment. Also, as measure of protection, the eye can be masked by windows or sun glasses. Source

Pinzaru S.C.,Babes - Bolyai University | Falamas A.,Babes - Bolyai University | Dehelean C.,Victor Babes University of Medicine and Pharmacy Timisoara | Morari C.,INCDTIM Cluj Napoca | Venter M.,Babes - Bolyai University
Croatica Chemica Acta | Year: 2013

Surface enhanced Raman scattering (SERS) effect is currently exploited as the basis of a new type of optical labels for in vivo investigation of the tissues, especially for early medical diagnostic. Silver colloidal nanoparticles decorated with chemisorbed cresyl violet molecular species could act as hybrid SERS labels. Their Raman scattering properties have been characterized here using different SERS techniques, and probing different excitation wavelengths, even in the near infrared. Obtaining FT-SERS signal of cresyl violet is of particular importance for applying FT-Raman spectroscopy to the tissues or cells, in providing sensitive information in the close vicinity of the SERS label incubated into the biological sample. Furthermore, upon chemisorption on the silver nanoparticles, cresyl violet molecular orientation provided both amino functional groups free of interaction with the silver, resulting double aminofunctionalized Ag nanoparticles suitable for DNA tagging. SERS tests of melanoma induced in mouse using CV-Ag SERS label suggested the possibility to setup the tissue labeling procedure for skin cancer monitoring. Source

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