Browsing Electronic & Electrical Eng by Sponsor "European Commission"
Now showing items 1-8 of 8
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Field-induced transformations in the biaxial order of non-tilted phases in a bent-core smectic liquid crystal
(Institute of Physics, 2010)The structural and electro-optic investigations of an achiral bent-core molecule in SmAPA phase, in which the polar directors in the neighboring layers are arranged anti-ferroelectrically, show that it undergoes transformation ... -
Sequence of Four Orthogonal Smectic Phases in an Achiral Bent-Core Liquid Crystal: Evidence for the SmAP(alpha) Phase
(2011)The mesomorphic properties of an achiral bent-core liquid crystal derived from 4-cyanoresorcinol are studied by polarizing optical microscopy, x-ray diffraction, and second harmonic electro-optic response. It shows a novel ... -
Short-range correlations seen in the nematic phase of bent-core liquid crystals by dielectric and electro-optic studies
(2011)Three bent-core nematic liquid crystals having the same core but with different terminal groups, short (C4) and long (C7,C9) tails, are investigated by dielectric and electro-optic contrast spectroscopic techniques. C4 ... -
Sign reversal in the dielectric anisotropy as functions of temperature and frequency in the nematic phase of a bent-core mesogen
(2010)The sign reversal in the dielectricanisotropy(???????) from positive to negative is observed for 4-cyanoresorcinol bisbenzoate system with temperature and frequency in the nematic phase of a bent-core system as the temperature ... -
Spontaneous Periodic Deformations in Nonchiral Planar-Aligned Bimesogens with a Nematic-Nematic Transition and a Negative Elastic Constant
(2010)Hydrocarbon linked mesogenic dimers are found to exhibit an additional nematic phase below the conventional uniaxial nematic phase as confirmed by x-ray diffraction. The phase produces unusual periodic stripe domains in ... -
Testbed Federation: An Approach for Experimentation-driven Research in Cognitive Radios and Cognitive Networking
(2011)The sub-optimal exploitation of radio spectrum is widely accepted. Cognitive radio is a technol ogy that aims to address this issue and improve the overall efficiency of radio spectrum utiliza tion. However, this ...