November 2011

Tool for evaluation using virtual reality

  This paper shows an educational software for evaluation of Formal Languages subject. Along with a simple interface of easy understanding and application, it is going to present exercises where the student will visualize the automaton on 3D and shall develop the ‘regular expression’ and in a second moment shall develop a minimization of the automaton interacting directly to the 3D object. For the...

Author(s): Adriana Soares Pereira and Sandra Dutra Piovesan

November 2011

Ultra high speed semiconductor electro-optic modulator devices for gigahertz operation in optical communication systems

  The effects of electrodes geometry and temperature on high frequency transmission characteristics are deeply investigated against semiconductor material based electro-optic modulator devices such as aluminum gallium arsenide (AlGaAs) and optical waveguide parameters. Optimization of the electro-optic modulator parameters, where the effective index plays an essential role in the evaluation of the bandwidth...

Author(s): Abd El–Naser A. Mohamed, Mohamed A. Metawe&#;e Ahmed Nabih Zaki Rashed and Amira I. M. Bendary