Papers by Toluwanimi O L U W A D A R A Akinyemi
Research and industrial studies have indicated that small size, low cost, high precision, and eas... more Research and industrial studies have indicated that small size, low cost, high precision, and ease of integration are vital features that characterize microelectromechanical systems (MEMS) inertial sensors for mass production and diverse applications. In recent times, sensors like MEMS accelerometers and MEMS gyroscopes have been sought in an increased application range such as medical devices for health care to defense and military weapons. An important limitation of MEMS inertial sensors is repeatedly documented as the ease of being influenced by environmental noise from random sources, along with mechanical and electronic artifacts in the underlying systems, and other random noise. Thus, random error processing is essential for proper elimination of artifact signals and improvement of the accuracy and reliability from such sensors. In this paper, a systematic review is carried out by investigating different random error signal processing models that have been recently developed for MEMS inertial sensor precision improvement. For this purpose, an in-depth literature search was performed on several databases viz., Web of Science, IEEE Xplore, Science Direct, and Association for Computing Machinery Digital Library. Forty-nine representative papers that focused on the processing of signals from MEMS accelerometers, MEMS gyroscopes, and MEMS inertial measuring units, published in journal or conference formats, and indexed on the databases within the last 10 years, were downloaded and carefully reviewed. From this literature overview, 30 mainstream algorithms were extracted and categorized into seven groups, which were analyzed to present the contributions, strengths, and weaknesses of the literature. Additionally, a summary of the models developed in the studies was presented, along with their working principles viz., application domain, and the conclusions made in the studies. Finally, the development trend of MEMS inertial sensor technology and its application prospects were presented.
International Journal of Scientific & Engineering Research, 2018
A free convection flow and heat transfer of nanofluid over a porous plate in a Darcy-Forccheimer ... more A free convection flow and heat transfer of nanofluid over a porous plate in a Darcy-Forccheimer flow has been investigated. The governing partial differential equations are transformed into a system of ordinary differential equations using similarity transformation method and solved numerically using the Runge-Kutta fourth order alongside shooting technique. The influences of solutal Grashof number Gm, thermal Grashof number Gr, Brownian motion Nb, Lewis number Le and Thermophoresis Nt on the temperature, velocity and concentration distribution are investigated and the results are illustrated graphically. The reduced local Nusselt number and the reduced local Sherwood numbers are presented and compared with existing related studies; the comparisons are in excellent agreement.
EJERS, European Journal of Engineering Research and Science, 2018
This study investigates into the possibilities and opportunities in Nigeria telecoms terrestrial ... more This study investigates into the possibilities and opportunities in Nigeria telecoms terrestrial network. The current backbone network map of two mobile telecommunication operators in Nigeria have been analysed for the purpose of determining the suitable fibre network coverage. A proposal has been drawn on the workability of a single national fibre network coverage resulting to increased quality of services at a lower cost to the consumers.
TRANSACTIONS ON MACHINE LEARNING AND ARTIFICIAL INTELLIGENCE, 2017
The research conducted and described in this paper focuses on the design of a cooling system usin... more The research conducted and described in this paper focuses on the design of a cooling system using thermoelectric or peltier module (TEM) and heatsinks with considerations for temperate climatic conditions. A case study of Nigeria has been chosen. Nigeria as a tropical region experiences high temperature difference between the year (18-40℃) with sunhours ranging between (100-210 hrs) monthly, such that the desire for chilled beverages almost throughout the day becomes paramount neccesitating the need for a peltier mobile cooler in tropical regions especially with inadequate electricity supply. A 9-litre rectangular shaped cooler was chosen with an area of 1.155m 2 , a dimension of 0.65 × 0.35, estimated to contain 120 beverages with an estimated heat load of 483W. It is estimated to use five thermoelectric modules, a temperature sensor, tec controller, DC powered battery and ten heat sinks. Comparatively, the design criterias of these peltier cooler were compared with the performance evaluation of existng similar designs and found to be within optimum performance levels. At 10℃, the thermoelectric modules are powered to start cooling until the beverages are at 0℃ (estimated to be a period of fifteen minutes), afterwhich the tec controller turns off power and the system is temporarily off until a temperature of 10℃ is detected by the temperature sensor and a re-cooling is initiated. With these the frozen beverage products received in the morning can be re-cooled as many times as possible.
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Papers by Toluwanimi O L U W A D A R A Akinyemi