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Entropic nonextensivity as a measure of time series complexity
(Physica A: Statistical Mechanics and Its Applications, 2004)
Information entropy is applied to the analysis of time series generated by dynamical systems. Complexity of a temporal or spatio-temporal signal is defined as the difference between the sum of entropies of the local linear ...
Modification of carbon cloth by interaction with pulsed TEA CO2 laser
(Materials Science Forum, 2004)
The interaction of a Transversely Excited Atmospheric (TEA) CO2 laser (pulse duration less than 2 mus) with carbon and activated carbon cloth was investigated. The investigations have shown that carbon cloth had been ...
Thermal diffusivity of cold sintered Co
(Materials Science Forum, 2004)
Cold sintering of cobalt powder (up to 1.2 GPa) was accompanied by measurements of density and thermal diffusivity. Dependence of density change upon pressing pressure is derived. Thermal diffusivity of the material was ...
Cerium silicates formation from mechanically activated oxide mixtures
(Journal of Materials Science, 2004)
Reactions of cerium silicate formation in mechanically activated oxide powders of CeO2 and SiO2 (quarz) were studied. Three different mixtures were prepared, the compositions of which corresponded to Ce2Si2O7, Ce-4.67(SiO4)(3)O ...
The influence of the solid/liquid ratio on the point of zero charge of alumina
(Materials Science Forum, 2004)
The point of zero charge (pH(pzc)) of three samples of commercial aluminum oxide in aqueous KNO3 (10(-3) - 10(-1) mol/dm(3)) solution was investigated using batch equilibration, mass titration and acid-base titration ...
Chiral ligand-exchange chromatography as the screening method for proposed modifications in exametazime synthesis to enhance diastereoselectivity
(Journal of Pharmaceutical and Biomedical Analysis, 2004)
Tc-99m(V)-d,l-HM-PAO complex is well-known radiopharmaceutical for regional cerebral blood flow imaging. The proposed modifications in exametazime, hexamethylpropyleneamine oxime (HM-PAO) (4,8-diaza-3,6,6,9-tetramethylun ...
Characterization of polystyrene filled with HgS nanoparticles
(Materials Letters, 2004)
A polystyrene (PS)-HgS nanocomposite has been synthesized by first preparing a copolymer of styrene and mercury-acrylamide (5% by weight) and further reaction of it with H2S in chloroform solution. The effect of the HgS ...
Spin glass formation in Li-substituted Co2TiO4 spinel
(Journal of Physics: Condensed Matter, 2004)
DC magnetization and AC susceptibility measurements point to the formation of a spin glass state in the ternary spinel-type compounds Li1.33xCo2-2xTi1+0.67xO4. The dynamics of spin freezing was analysed with both the ...
Thermostability and surface morphology of nano- and micro-filled NBR/CSM and CR/CSM rubber blends
(Journal of the Serbian Chemical Society, 2004)
Acrylonitrile-butadiene rubber (NBR), polychloroprene rubber (CR). chlorosulphonated polyethylene rubber (CSM) and their blends were cross-linked with sulphur, ethylene-thiourea. magnesium oxide or their combination. The ...
X-ray photoelectron study of calcium cerium titanate ceramics
(Russian Journal of Inorganic Chemistry, 2004)
The elemental and ionic quantitative compositions and oxidation states of elements in the ceramics CaCe0.9Ti2O6.8 (I) and CaCeTi2O7 (II)-matrices for long-term storage of long-lived radionuclides constituting hi-h-level ...