Lukman A. Yusuf

Bayero University, Kano; University of Glasgow

The persistence of bisphenol A in the environment poses significant ecological hazards. Traditional treatment methods often fall short in removing micropollutants such as bisphenol A from wastewater. The use of ultrasound in water treatment has the potential to induce powerful oxidative degradation of micropollutants while dispensing with the need...

Methylene blue is one of the most common pollutants found in wastewater, primarily due to its widespread use in the dye industry. Consequently, it is imperative to explore environmentally friendly and efficient methods for degrading this pollutant into non-toxic byproducts. While ultrasonic degradation methods in combination with additives or catal...

Grain refinement in alloys is a well-known effect of ultrasonic melt processing. Fragmentation of primary crystals by cavitation-induced action in liquid metals is considered as one of the main driving mechanisms for producing finer and equiaxed grain structures. However, in-situ observations of the fragmentation process are generally complex and d...

A global rise in demand for energy gives rise to a plethora of challenges like the increase in greenhouse gas emissions with its associated environmental impact. The manufacturing sector is a key wealth-generating sector in any economy and with significant amounts of energy consumed, they play a key role in any energy minimisation strategy and poli...

Dual-perspective high-speed imaging and acoustic detection is used to characterise cavitation activity at the tip of a commercial 20 kHz (f0) ultrasonic horn, over 2 s sonications across the range of input powers available (20 – 100 %). Imaging at 1 × 10⁵ frames per second (fps) captures cavitation-bubble cluster oscillation at the horn-tip for the...

BrushLess Direct Current (BLDC) motor is a multivariable and highly complex nonlinear system. Variation of internal parameter values with environment or reference signal increases the difficulty in controlling the BLDC effectively. Advanced control strategies (like model predictive control) often have to be integrated to satisfy the control desires...

Procurement of measuring device, maintenance cost coupled with calibration of the instrument contributed to the difficulty in forecasting of global solar radiation in underdeveloped countries. Most of the available regressional and mathematical models do not capture well the behavior of the global solar radiation. This paper presents the comparison...

Turbidity is a measure of water quality. Excessive turbidity poses a threat to health and causes pollution. Most of the available mathematical models of water treatment plants do not capture turbidity. A reliable model is essential for effective removal of turbidity in the water treatment plant. This paper presents a comparison of Hammerstein Wiene...

The use of renewable energy resources has been a major concern to the global researchers at large, in most cases it requires the use of an inverter in order to power A.C loads. Adequate controlling of time domain response of inverter is the major problem hindering the popularity in the use of inverter for many applications. This paper proposed the...

Instability may cause a system to move dangerously and suffer bodily damage, which can become costly. One of the reasons for designing control systems is to stabilize an unstable system. However, control of unstable systems is primarily more difficult either due to lack of precise description of the system or incompletely modelled disturbances. App...

This paper presents power flow solution techniques and analyses of radial distribution systems with distributed generation incorporated in their network. The result of the analysis gives the power system static states in terms of bus voltage magnitudes and voltage angles, active and reactive powers as well as system losses. Since conventional power...

Stability is require in any control system, most system require controller in order to be stable. Tuning is one of the major problems associated with most conventional controllers in existence today. This paper addressesd the difficulties associated with tunning by considering an effective optimized Controller on Inverted pendulum for the control o...

Road unevenness causes wheel and engine vibration which in turn lead to internal noise in automobiles. Developing a reliable control algorithm for vehicle suspension system is quite cumbersome due to the nonlinear nature of the system coupled with the issue of improving compromise between the conflicting demands of ride comfort and road handling. T...

The brushless DC (BLDC) motor has been found to offer many advantages that includes simple to construct, high torque capability, small inertia, low noise etc. BLDC is an unstable and non-linear system which implies that its internal parameter will change for different input conditions. Therefore, there is need for an excellent controller that will...

This paper applies neural networks and differential evolution to the estimation of air quality and compares the accuracy of their results using the mean square error (MSE) method. Air pollution is an ever increasing menace in major cities around the world. The MSE approach has been adopted because it is the basis of the Widrow-Hoff or least mean sq...

Since independence, Nigeria has failed to conduct a fully free and fair election due to socio-political and sometimes religious factors. Elections are always rigged and destabilized using thugs and other rigging techniques. Paper or ballot voting and corruption are the main causative agents for this failure of free and fair election. Electronic vot...

Stability is very necessary in control system and it becomes more difficult to achieve for a nonlinear system which inverted pendulum is an example. Most of the controllers available suffer from problems such as difficult in tuning process, sluggishness in response time, quick and global convergence etc. This paper considered Proportional-Integra-D...

Stability is a very necessary state in control system and it becomes more difficult to achieve for a non-linear system. This paper looked at Fuzzy Logic Control (FLC) of Inverted pendulum for the control of the angle position. A conventional Proportional plus Integra plus Derivative (PID) controller was used to validate the proposed scheme. The FLC...

Stability is very necessary in control system and it becomes more difficult to achieve for a non-linear system. This paper considered two control schemes: Fuzzy Logic Control (FLC) and Proportional-Integra-Derivative optimized with Genetic Algorithm (GA-PID) Controller on Inverted pendulum for the control of the angle position. The FLC scheme was d...