June 2015

Variational homotopy perturbation method for solving the generalized time-space fractional Schrödinger equation

We suggest and analyze a technique by combining the variational iteration method and the homotopy perturbation method. This method is called the variational homotopy perturbation method. We use this method for solving Generalized Time-space Fractional Schrödinger equation. The fractional derivative is described in Caputo sense. The proposed scheme finds the solution without any discritization, transformation or...

Author(s): A. M. S. Mahdy, A. S. Mohamed and A. A. H. Mtawa

June 2015

Outdoor performance analysis of a monocrystalline photovoltaic module: Irradiance and temperature effect on exergetic efficiency

Studies realized on the performance of photovoltaic modules have shown that analysis of the effect of meteorological parameters is crucial in prediction and evaluation of performances; and production of solar systems. This paper highlights the performing analysis of a monocrystalline silicon photovoltaic module. The aim of this work is to study the effect of irradiance and temperature on module performance in a real...

Author(s): Cheikh El Banany ELHADJ SIDI, Mamadou Lamine NDIAYE, Ababacar NDIAYE, and Papa Alioune NDIAYE

June 2015

Microwave propagation attenuation due to earth’s atmosphere at very high frequency (VHF) and ultra-high frequency (UHF) bands in Nsukka under a clear –air condition

The microwave propagation attenuation due to earth’s atmosphere under a clear-air condition for fade depth of 10 dB was investigated using refractivity data calculated from weather vagaries measurement carried out between January and December 2008. The International Telecommunication Union-Radiocommunication Sector (ITU-R) model for multipath fading for small percentage of time with link distance of 100 km was...

Author(s): Ernest Benjamin Ikechukwu Ugwu, Maureen Chioma Umeh and Obiageli Josephine Ugonabo