Numerical solutions of unsteady laminar free flow of a viscous fluid past an immersed curved surface were presented in this research study. The two-dimensional fluid flow in consideration was unsteady and incompressible. Flows of this nature are commonly encountered in engineerin...
Open access
Research Article10.9734/PSIJ/2018/43567
Wide band gap technology has its challenges. However, such materials include CeTiO2 are known to have a wide band gap of about 3.55 eV. The effort is now directed towards CeTiO2 thin-films by incorporating nanoparticles. Finding wide band gap materials that are both transparent t...
Open access
Research Article10.9734/PSIJ/2018/38745
Accurate estimation of refractivity gradient and geoclimatic factor is highly necessary for radio signal propagation in clear air environment to cater for fade margin, essential for a reliable radio link. This is necessary because of the unstable nature of the environment the sig...
Open access
Research Article10.9734/PSIJ/2018/34489
Temperature is extremely significant to the PV modules degradation process, especially hot spots, encapsulant bleaching, delamination failure on interconnections, corrosion, discoloration, and bubbles on the panel’s surface. We investigated the degradation of crystalline silicon...
Open access
Research Article10.9734/PSIJ/2018/42864
Copper and Cadmium Telluride thin films have been successfully deposited on a glass substrate indium doped Tin oxide (ITO) by electrodeposition technique. The absorbance was measured using M501 UV-visible spectrophotometer in the wavelength range of 300-900 nm. Copper and Cadmium...
Open access
Research Article10.9734/PSIJ/2018/43238
The need for comprehensive periodic air quality measurements to assess the extent of airborne particulate matter and trace metals exposure in residential areas in Lagos State in view of the urbanization and different energy cooking source cannot be overemphasized. Total Suspended...
Open access
Research Article10.9734/PSIJ/2018/43109
A vast amount of previous work on hemispherical contact is almost solely dedicated to quasi-static normal loading (axisymmetric 2D models). Some scarce work exists on tangential loading but it is limited to full stick conditions. The sliding of interfering bodies is considerably...
Open access
Research Article10.9734/PSIJ/2018/42783
The Darcy-Forchemmer in fluid-saturated porous media finds application in a variety of engineering processes such as heat exchanger devices, chemical catalytic reactors and metallurgical applications-hot rolling of wires, drawing of metals and plastic extrusion. Also, entrepreneu...
Open access
Research Article10.9734/PSIJ/2018/41870
The dual frequency signals from the GPS satellites were recorded and analyzed to study the ionospheric variations in terms of Total Electron Content (TEC) as well as the Scintillation index (S4). Seasonal variations of Total Electron Content as well as the ionospheric scintillati...
Open access
Research Article10.9734/PSIJ/2018/41782
An effort was made in this work to calculate the total ground state energy and electronic band structure of Fullerenes (C60), Graphite and Diamond using FHI-aims Density Functional Theory (DFT) code. The density functionals used are the local-density approximation (LDA) in the pa...
Open access
Research Article10.9734/PSIJ/2018/41778
The excess parameters associated with liquid mixtures were evaluated in order to ascertain the relative strength of intermolecular interactions in binary mixtures of 1,2-Dimethoxyethane-Propylene Carbonate (DME-PC) and 2-Methoxyethyl ether-Propylene Carbonate (DGM-PC). The densit...
Open access
Research Article10.9734/PSIJ/2018/42560
We study a dynamic model describing the cooperation-competition between two species, where the first species diffuses along a smooth distribution function while the second is dispersive randomly. The analysis is designed for weak competition with corresponding coefficients and by...
Open access
Research Article10.9734/PSIJ/2018/42472
A new type of intermittency observed in an auto stochastic dynamic system with a multicomponent chaotic attractor consisting of several Lorentz attractors is considered. It is shown that it is caused by the coexistence of two types of intermittency: "chaos – chaos" and "quasiperi...
Open access
Research Article10.9734/PSIJ/2018/42359
This work investigates flow, heat and mass transfer of a chemically reacting and electrically conducting micropolar fluid over an exponentially stretching sheet in the presence of thermal radiation, viscous dissipation, suction/injection, heat source/sink and slip effects. The sy...
Open access
Research Article10.9734/PSIJ/2018/41938
An attempt is made to explain the meaning of entropy in thermodynamics. A new concept of heat capacity is defined. For it, the temperature change is measured from 0 kelvin. It is supposed that the entropy of a substance is the sum of these heat capacities in the formation of the...
Open access
Research Article10.9734/PSIJ/2018/41666