A5072647724- Thermal Radiation and Cooling Technologies
- Advanced Thermodynamics and Statistical Mechanics
- Radioactivity and Radon Measurements
- Advanced Thermoelectric Materials and Devices
- Solar Thermal and Photovoltaic Systems
- Graphene research and applications
- Nuclear and radioactivity studies
- Graphite, nuclear technology, radiation studies
- Solar-Powered Water Purification Methods
- Thermal properties of materials
- Chalcogenide Semiconductor Thin Films
- Energy and Environment Impacts
- Geophysical Methods and Applications
- Carbon Nanotubes in Composites
- Geophysical and Geoelectrical Methods
- Quantum Dots Synthesis And Properties
- Heusler alloys: electronic and magnetic properties
- Hybrid Renewable Energy Systems
- Photovoltaic System Optimization Techniques
- Noise Effects and Management
- Solar Radiation and Photovoltaics
- Radiation Dose and Imaging
- Atmospheric chemistry and aerosols
- Lubricants and Their Additives
- Radiation Shielding Materials Analysis
Covenant University
2016-2025
Ton Duc Thang University
2019-2020
University of Johannesburg
2019
University of Ibadan
2012
Abstract Robotics and autonomous systems are reshaping the world, changing healthcare, food production biodiversity management. While they will play a fundamental role in delivering UN Sustainable Development Goals, associated opportunities threats yet to be considered systematically. We report on horizon scan evaluating robotics impact all involving 102 experts from around world. likely transform how Goals achieved, through replacing supporting human activities, fostering innovation,...
Investigation on the use of KOH and NaOH catalysts for waste groundnut oil (WGO) biodiesel production, as well comparative adoption response surface methodology (RSM) artificial neural network (ANN) modelling yield process parameters was carried out in this research work. Box–Benkhen experimental design adopted four considered were methanol-oil mole ratio (6–12), catalyst concentration (0.7–1.7 wt%), reaction temperature (48–62°C) time (50–90 min). The results work reveal that produced...
Abstract Natural radioactivity in coastaline area soil of Ado-Odo/Ota has been carried out to ascertain the presence radionuclides using gamma-ray spectroscopy (HPGe detector). The result showed that U-238, Th-232 and K-40 ranged from 24 ± 7–49 10; 67 6–120 9 88 17–139 20 Bqkg −1 respectively. radium equivalent for samples 132.51 230.91 with mean value 185.89 . gamma dose rate was estimated be 81.32 nGyh values annual effective 0.61 1.07 mSv y estimation alpha index representative (Iα) 0.12...
Response surface methodology (RSM) and Artificial neural network (ANN) analysis of crude palm kernel oil (CPKO) biodiesel production, using KOH NaOH catalysts, were carried out in this research work. The four process parameters considered during the production modelling stages 6–12 mol ratio methanol/oil, 0.7–1.7 wt/wt% catalyst concentration, 48–62 °C reaction temperature 50–90 min time. Log sigmoid function Levenberg marquardt technique adopted ANN while Box-Benkhen method was utilised for...
In Nigeria, high and outrageous energy cost constitutes a serious challenge to all aspects of the economy. And this has been subject concern in country over period time. A dependable renewable source is utmost desire strengthen nation's economy urgent need cannot be overlooked. As result erratic expensive power supply national grid, it become ultimately necessary search for other inexpensive sources meet ever increasing needs rural urban dwellers. view above situation paper aimed at carrying...
A detailed method used for assessing and mapping noise pollution levels in Ota metropolis, Nigeria using ArcGIS 10.5 Software is presented this paper. Noise readings were measured at a time interval of 30 min each site considered precision grade sound level meter. The map developed was based on the computed values average equivalent (LAeq) selected locations. Results study show that weighted (LAeq), background (L10) peak (L90) vary with location period day due to traffic characteristics...
Abstract The risk of natural terrestrial radioactivity on human health is often underestimated, and environmental safety awareness necessary. Hence, this study aims to assess sources gamma radiation emitter in coastal urban-environment using the radiometric technique. dosage from a parent radionuclide such as Uranium-238 ( 238 U), Thorium-232 232 Th) Potassium-40 40 K) were measured portable spectroscopy. result showed that value U activity was between 10.81 $$\pm$$ <mml:math...
Thermionic energy conversion (TEC) using nanomaterials is an emerging field of research. It known that graphene can withstand temperatures as high 4600 K in vacuum, and it has been shown its work function be engineered from a value (for monolayer/bilayer) 4.6 eV to low 0.7 eV. Such attractive electronic properties (e.g., good electrical conductivity dielectric constant) make candidate emitter collector thermionic converter for harnessing solar efficiently. We have used modified...
This paper describes the environmental and health impacts of toxic emissions from energy usage for cooking along with application simple physics detailed experimental studies on procedures reducing "on-stove time" minimum Energy (Heat) using a new innovative efficient techniques inexpensive insulation box. The total amount heat, Qm, required to cook 1 kg dry rice, beans, raw potato goat meat technique stove power 626 + 10 W are found as: 562 3 kJ, 708 4 278 2 716 kJ respectively. savings...
Awareness of the dangers associated with exposure to high radiation in environment is necessary avoid its health impact, especially when staying in-door. Assessment gamma dose rate and radionuclides urban settings Ota has been carried out using a hand-held detector determine hotspot concentration study area. In this study, eighteen (18) stations were covered, radio-nuclides (Uranium-238, Thorium-232, Potassium-40) emitting from subsurface measured. The result showed that mean value for...
Graphene and carbon nanotube (CNT) have been proposed to be good materials for thermionic energy converter (TEC). For accurate simulation of performance TEC, it is important know the correct equation temperature dependence emission current density (J) from graphene nanotube. In this paper we first consider existing theory electron dispersion relation in reconsider relations between Fermi velocity some form mass graphene. We then various models J versus T (J(T)) their applicability...
Abstract This study adopts the use of Vertical Electrical Sounding (VES) and 2-D resistivity imaging (employing Schlumberger Wenner array configurations) to investigate map extent leachate’s migration its possible impacts on groundwater within Abata Asunkere dumpsite, Ilorin, Kwara State. was inspired by unrestrained manner garbage dumping in area over time, which poses great threat availability clean water for increasing populace. To delineate subsurface, data were acquired along two...
For the first time we have derived an equation for temperature (T) dependent work function (W(T)) containing terms up to fifth power of T which gives a modified Richardson-Dushman (MRDE) that fits excellently well experimental data thermionic current density, J vs temperature, suspended monolayer graphene. It provides unique technique accurate determination function, W0, Fermi energy, EF0 at 0 K and surface density charge carriers, ns The corresponding values obtained graphene are:...
Abstract Wildfire causes havoc and serious destruction of forest resources wildlife. It also occasionally damages to human lives properties. Current technology fighting wildfire employs fire retardant chemicals, which pollute the environment seriously, both wild aquatic lives. Based on new novel technology, it is possible that in near future industrial emissions environments cause health problems would be completely captured frozen solid forms products. One these carbon dioxide, known as dry...
In this study, five mathematical models were fitted in the absence of space charge with experimental data to find a more appropriate model and predict emission current density graphene-based thermionic energy converter accurately. Modified Richardson Dushman (MRDE) shows that TEC's electron depends on temperature, Fermi energy, work function, coefficient thermal expansion. Lowest Least square value [Formula: see text] makes MRDE most suitable modelling TEC over other four tested models. The...
Datasets contained in this article are noise level measurement carried out at 41 different locations Ota metropolis, Nigeria. The readings were measured a time interval of 30 min for each site considered using precision grade sound meter. analysis was based on the descriptors LAeq, L10, L90, LD, TNI and NEI. Results from study reflects that highest lowest equivalent levels (LAeq) recorded commercial areas (96 dB (A)) residential (52 (A)), respectively, background (L90) has values (77 (44...
We consider the energy dynamics of power generation from sun when solar is concentrated on to emitter a thermo-electronic converter with help parabolic mirror. use modified Richardson-Dushman equation. The cross section assumed be exactly equal focused area at height h base mirror prevent loss efficiency. report variation output insolation, h, reflectivity mirror, and anode temperature, initially assuming that there no space charge effect. Our methodology allows us predict temperature which...
Recent advances in science and technology of materials fabrication, engineering work functions, micrometer gap machining between emitter collector are making thermionic conversion/converter (TEC) solar energy an emerging technology.As the converter is lightest all devices with highest direct power conversion density (per unit area converting surface), it has, potential for substituting photovoltaic to a large extent deployment space as source.This article summarizes current...
In Nigeria, high and outrageous energy cost constitutes a serious challenge to all aspects of the economy. And this has been subject concern in country over period time. A dependable renewable source is utmost desire strengthen nation's economy urgent need cannot be overlooked. As result erratic expensive power supply national grid, it become ultimately necessary search for other inexpensive sources meet ever increasing needs rural urban dwellers. view above situation paper aimed at carrying...