August 2013
Effect of stabilizers on stiffness modulus of soil layers: A review
Subgrade layer has a significant contribution in the pavement structure, and the quality of this layer has a great impact on the subsequent pavement design. Pavement design guide as specified in the AASHTO (2002), incorporates engineering properties of unbound and stabilized subgrade soils, since in many cases fatigue or rutting failure in pavements are due to insufficient stiffness modulus in soil layers. Subgrade...
August 2013
Synthesis and characterization of polyindole with liquid crystalline azobenzene as side chains
In this study, a series of azobenzene-functionalized liquid crystalline (LC) polyindole derivatives: poly{2-[N-ethyl-N-[4-[4'-(nitrophenyl)azo]phenyl]amino]ethyl-3-indolyl acetate}, poly(In3AA-RedI), poly{2-[N-ethyl-N-[4-[4'-(nitrophenyl)azo]phenyl]amino]ethyl-3-indolyl acetate-co-indole}, poly(In3AA-RedI-co-In), poly{2-[N-ethyl-N-[4-[4'-(nitrophenyl)azo]phenyl] amino]ethyl-3-indolyl...
August 2013
Almost quaternionic integral submanifolds and totally umbilic integral submanifolds
In this work, we consider a Riemannian manifold which admits an integrable distribution with an almost quaternionic structure V. We show that the torsion tensor of an almost quaternionic structure is independent of the choice of bases. We prove that the integral submanifolds are totally umbilic under the condition of the conjugate shape operator is skew-adjoint. We give another condition...
August 2013
Multiband fractal based reconfigurable antenna with introduction of RF MEMS switches for next generation devices
Next generation network’s main requirements are compact size and also support to heterogeneous network. Fractal antennas have useful applications in cellular telephone and microwave communications. Video conferencing, streaming video are main applications that are included in next generation networks and requirements for these applications are high data rates require to have high bandwidth. But as size of antenna...
August 2013
Synthesis and characterization of nano-hydroxyapatite (n-HAP) using the wet chemical technique
Hydroxyapatite nanoparticles were synthesized, using a wet chemical technique with diammonium hydrogen phosphate and calcium nitrate tetrahydrate precursors, respectively. The pH of the system was maintained at 10.8 throughout the stirring process, by using 0.1 M sodium hydroxide. The mixture was allowed to remain stirred overnight and a white precipitate was formed. The precipitate was vacuum dried and cleaned with...
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