The ab initio Density Functional Theory (DFT) have demonstrated acceptable role in complementing material development efforts. A number of materials have been predicted by DFT, with some of these materials already synthesized. ...

Rapid fluctuation of signals due to tropospheric scintillation with simultaneous occurrence of rain can become significant impairment along the propagation paths in satellite communication systems. When radio wave signal ...

The development of CO2 and CO gas detecting system which is portable, cheap and easy to implement is presented. This detector is made up of dual power supply (AC and DC), sensing circuit, microcontroller unit and liquid ...

In the transmission of radio wave through the atmosphere (the troposphere), radio propagation is affected by the changes of water vapour in the troposphere. This study utilized two years archived data (Jan. 2011-Dec. 2012) ...

This work describes the analysis of the characterization of refractive index structure constant ( 2 n C ) in some selected stations in Nigeria. The study utilizes 5 years (January 2010-December 2014) meteorological data ...

Daily magnetic records obtained from 10 geomagnetic observatories along African longitudes between September 2008 and August 2009 were employed to investigate the electromagnetic inductive responses as a result of solar ...

The seasonal and diurnal variations of radio refractivity were investigated at different pressure levels for the Coastal, Savannah and Arid regions of Nigeria. The stations studied include Port-Harcourt (5.00°N, 7.50°E), ...

In this work, activity concentrations of natural radionuclides in granites from eight major operational quarries in Osun State, Southwestern Nigeria were assessed. Eighty granite samples comprising 34 inch, 12 inch and ...

In this research, a hatching machine using proportional, integral and derivative (PID) controller to regulate its temperature and the relative humidity was developed. This ensures that the eggs are kept at optimum conditions ...

In design of a radio communication networks, it is important to know the atmospheric radio refractive index because the meteorological conditions have a significant impact on radio wave propagation through the atmosphere ...