This research work was centered on optimizing the Fluxgate Magnetometer Sensor (FMS)at reduced noise level and enhanced sensitivity. The FMS was developed using Manganese Zinc (MnZn) ferrite alloy different from the usual permalloy and amorphous alloy materials. The developed FMS using MnZn ferrite achieved reduced sensor dimensions with high sensi... Continue Reading
The state space is applied in the design of Magnetic Suspension System, where a controller is designed with the aim of making the system stable and providing the performance specifications of settling time less than or equal to 0.5 secs, Maximum overshot less than or equal to 5 percent and Steady State error less or equal to 1 percent. A reference ... Continue Reading
The black cotton soil (BCS) used in the study was classified as A-7-6(22) soil group of the AASHTO soil classification system and CH group in the Unified Soil Classification System (USCS). The effect of iron ore tailing (IOT) on ordinary Portland cement (OPC) modified soil was studied with respect to specific gravity, particle size distribution, At... Continue Reading
The challenge of optimal resource allocation to subscribers ofmobile Worldwide Interoperability for Microwave Access (WiMAX) has not been fully overcome by researchers. This research work developed an optimal scheduling algorithm for WiMAX resource allocation based on an improved Particle Swarm Optimization (PSO) technique. In this work, an improve... Continue Reading
Estimation of rainfall for a desired return period is one of the pre-requisites for any design purpose at a particular site, which can be achieved by probabilistic approach. This study is aimed at using the statistical parameters of long-term observed rainfall data to generate monthly rainfall depth and estimate rainfall values at different return ... Continue Reading
The quest for economy in asphalt production using locally available materials necessitated this research which is aimed at evaluating the suitability of Saw Dust Ash (SDA) as mineral filler in asphalt mixture.Chemical analysis, sieve analysis, specific gravity and plasticity index tests were performed on SDA. Asphalt briquettes prepared using Ordin... Continue Reading
For several reasons, invisible electromagnetic signals in the RF and infrared frequency spectra are preferred for the remote control of consumer electronics. However, a niche exists for the use of visible light for the remote control of domestic electrical fittings which require simple power control operations. Electrical fitting controllers like l... Continue Reading
This study centres around the evaluation of the expected total cost of reinforced concrete beams designed to BS 8110 (1985) when gross errors are accounted for. Beam performance functions are obtained for bending, shear and torsion. The performance function for a beam performing in combined bending and torsion is adopted from CP 110 (1972), where i... Continue Reading
Prediction of moment capacity of concrete slabs singly reinforced with carbon fiber reinforced plastics (CFRP) using simulated annealing is looked into. Equations for resistance moment are obtained based on the flexural requirements presented in ACI 440. 1R-06 (2006). These equations are then optimized using the Simulated Annealing (SA) algorithm. ... Continue Reading
Energy is one commodity on which provision of goods and services depend. Its availability and consumption rate is an economic index to measure the development of any community. Nigeria has limitation to power supply from the National grid which has adverse effect on the populace?s economic and social development. This necessitates the need for othe... Continue Reading
Internal Volume Forecasting Technique is one of the several methods of Quick Response Travel Demand technique. This thesis reviewed the various techniques used in travel demand modelling and demonstrated the application of the Internal Volume Forecasting technique towards deriving a travel demand model for Zaria. The study successfully validated th... Continue Reading
In highway pavement design, the main factors considered are the expected traffic, subgrade strength, and the constituent materials for the pavement structure. Associated with each of these factors, however, are elements of uncertainty. Ignoring these uncertainties, means that either high factors of safety are applied in design, with its cost implic... Continue Reading
In this study, a simple four-mould hydraulic piston press biomass hollow briquette making machine, suitable for household and small-scale production of circular briquettes with a centre hole was developed. The briquetting machine was operated using a 4-tons hydraulic jack. Other members of the machine include: the mould, pistons, lower and upper co... 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 effect of Vanadium and Molybdenum addition on the mechanical properties of ductile cast iron has been investigated. Alloys of ductile cast iron samples of varying additions of Vanadium and Molybdenum from 0.1- 0.3% were produced into cylindrical test bars by sand casting process using “sandwiched” treatment method. Unalloyed ductile cast ir... Continue Reading