Forecasting of voice traffic using an accurate model is important to the telecommunication service provider in planning a sustainable Quality of Service (QoS) for their mobile networks. This work is aimed at forecasting Erlang C �“ based voice traffic using a hybrid forecasting model that integrates fuzzy C-means clustering (FCM) and particle swar... Continue Reading
Five coal samples from Odagbo (Kogi State), Owukpa (Benue State), Ezimo (Enugu State), Amansiodo (Enugu State) and Inyi (Enugu State) weresubjected to proximate analysis, ultimate analysis, calorific value determination, petrographic and thermogravimetric analysis to determine their suitability for power generation. Tests were carried out at the la... Continue Reading
This research work assessed the technology used for cement plant by employing an old cement plant with post-combustion CO2 capture using a novel physical solvent (Selexol) commonly known as dimethyl ether polyethylene glycol. The CO2 capture plant was simulated using Aspen Hysys software after the flue gas analysis of the cement plant was carried o... Continue Reading
A method is proposed for extracting the parameters of a round rotor synchronous machine using real time operating data. The machine is modelled mathematically as a set of differential equations. These equations are linearized into algebraic equations from where the unknown parameters �“ stator resistance s r , stator leakage inductance ls L , dire... Continue Reading
The work presented EN338 (2009) strength classification for some common Nigerian timber species namely: Antiaris africana, Guarea cedrata, Piptadeniastrum africanum, and Isoberlinia tomentosa. The work also assessed the suitability of the Nigerian timber species for use as simply supported bridge beams according to EN1995-1-1(2004), EN1995-2(2004),... Continue Reading
The aim of this study was to investigate the suitability of using orange and banana peels as alternatives to wood-based particleboard composites. The orange and banana peels composite boards were produced by compressive molding using recycled low density polyethylene (RLDPE) as binder. The RLDPE was varied from 30 to 70wt% with interval of 10wt%. F... Continue Reading
A stochastic evaluation of the performance of Carbon Fibre Offshore Plastics (CFRP) offshore platform consideringsubmerged and partially submerged environmental conditions wasanalyzed usingSwedish code,Boverket (2004). A Probability-based analysis using First Order Reliability Method (FORM) was used to determine the safety index of the deck conside... Continue Reading
The subjects of interest in this work were the production of biogas via anaerobic co-digestion of tannery fleshing and cow-dung; and the reduction of sulphide concentration by direct inclusion of sodium and calcium alginate. Comparison of the efficacy of various tannery beam house effluents as substrate diluents indicated that the soaking liquor wa... Continue Reading
In this work, cutting fluid emulsion was developed from soya beans and the performance of the developed cutting fluid was evaluated by comparison with the conventional cutting fluid (control sample), using its ability to effectively perform as coolant during machining operation. The machining operation employed was the turning operation in which ch... Continue Reading
Six Carbon Fibre Reinforced Plastic (CFRP) pultruded beam section from The Pultex� Pultrusion Design Manual Volume 4 - Revision 8 Copyright � 2004 by Creative Pultrusions Inc., were assumed to be simply supported doubly symmetric I-section, with uniformly distributed load of 3.5kN/m2 applied over the length of 3.050m each. A comparative analysis ... Continue Reading
A black cotton soil collected from Deba Local Government Area of Gombe state classified as A-7-6 (25) or CH in AASHTO and Unified Soil Classification System (USCS), respectively. It was treated with lime �“ iron ore tailing (IOT) blend in stepped concentration of 0, 2, 4, 6 and 8 % lime as well as 0, 2, 4, 6, 8, and 10 % IOT by dry weight of soil.... Continue Reading
Results of preliminary investigation of the natural black cotton soil used in the study shows that it belongs to A �“ 7 �“ 6 (13) or CH in the AASHTO and Unified Soil Classification System (USCS), respectively. Soils under these groups are highly plastic and of poor engineering benefit. The soil was treated with up to 16% iron ore tailing, IOT (a... Continue Reading
The complexity and large number of computations involved in power flow and reconfiguration analysis of large distribution networks necessitates the need for the improvement of power flow and reconfiguration techniques. In this research work, a GPS based method is used in modeling Azare distribution network and in selecting the most appropriate posi... Continue Reading
The challenges of continual depletion, economic crisis and environmental issues of the petroleum fuels have attracted the scientists’ interest to seek for alternatives to fossil fuels. Biodiesel is the alternative to petrol diesel because; it has similar physicochemical properties to petrol diesel. However, biodiesel has not been competing favour... Continue Reading
An important component of cognitive radio is spectrum sensing to detect the presence or absence of primary (licensed) user in the spectrum band of interest. However, the traditional static spectrum allocation strategies cause temporal and geographical holes of spectrum usage in licensed bands. Spectrum occupancy was categorized into completely free... Continue Reading