Electronics

  2010 FEB 17 - (VerticalNews.com) -- "Sensitivity of resistance-current characteristic and programming speed to material and geometry of electrical contacts is demonstrated for same chalcogenide memory alloys. It was established that set speed is more sensitive to changes in top (positive) contact properties," investigators in the United States report.

  "Reset speed was found mostly dependent on bottom (negative) contact lateral properties: electro- and thermo-conductivity. Single fundamental failure mechanism: deterioration of programming speed is suggested," wrote S. Kostylev and colleagues ...read more

  2010 FEB 17 - (VerticalNews.com) -- "This paper presents a study regarding the quality of particular painting techniques - grisaille, black and white colors on thick paper, in case of an about 200 years old artwork, using exclusively two analytical laser techniques: Laser Induced Fluorescence (LIF) and Laser Induced Breakdown Spectroscopy (LIBS)," researchers in Bucharest, Romania report.

  "The investigation aimed the identification of the type of white and black colors, and an other possible specific color (yellow or ochre) compounds (which were not allowed by this technique). The results proved again the known efficiency of each mentioned investigation technique, but also the conclusions that could be drawn from the correlated experimental data," wrote J. Striber and colleagues ...read more

  2010 FEB 17 - (VerticalNews.com) -- "We report Density Functional Theory (DFT) calculations providing the geometrical and electronic structures, as well as the vibrational and optical properties of the homologous series of Pt-pyramidalized olefin complexes (CH2)(n)-(C8H10)Pt(PX3)(2), where X = H and Ph, and n = 0, 1, 2, and 3. All complexes were geometry optimized for the singlet ground state in vacuum using DFT methods with B3LYP exchange-correlation functional and the Effective Core Potential LANL2DZ basis set, within the frame of Gaussian03 quantum chemistry package. Electronic transitions were calculated at the same level of theory by means of Time Dependant-DFT," investigators in Constanta, Romania report ...read more