Browsing by Author "Akanni, Jimoh"

Now showing 1 - 17 of 17
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    A Modified COST-231-Hata Path Loss Model for Typical Semi-Urban Environments in Nigeria
    (Kampala International University, 2024-04) Akanni, Jimoh; Isa, Abdurrhaman Ademola; Ogunbiyi, Olalekan; Olufeagba, Benjamin Jimmy
    Outdoor path loss propagation modeling is critical in the planning and design of the coverage area by the Global System for Mobile Communication (GSM). For the best prediction of GSM signal at any location within its coverage region, an accurate forecast based on critical characteristics and a mathematical model is necessary. Multiple studies on path loss propagation model prediction for GSM networks conducted at various semi-urban environments in Nigeria proclaimed that propagation path loss models may provide different results when utilized in environments other than those in which they were initially designed, that car drive-test methodology was used during the data collection, and that COST-231-Hata model provides closet prediction to the practical measure values. This paper created an appropriate path loss model based on the COST-23-Hata model and outdoor measurement at 1800 MHz frequency range for the semi-urban area of Kwara State, Nigeria. The created model was used and validated with the measured data and COST-231-Hata model at other different semi-urban environments in Nigeria. The results analysis shows that the created model performed satisfactorily given the closet path loss prediction to the practical measure path loss values at all the study locations. It also gives the lowest Square Root Means Error (SRME) and Standard Deviation (SD) in all the base stations that were tested in semi-urban environments. The newly created model would therefore be more appropriate for GSM 1800 network design and installation in semi-urban environments in Kwara State, Nigeria, as well as any other semi-urban locations in Nigeria.
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    AJ-Olu-1: An Innovative Path Loss Model for Typical Nigerian Urban Environments
    (Kampala International University, Uganda, 2023-04) Akanni, Jimoh; Isa, Abdurrhaman Ademola; Ogunbiyi, Olalekan; Olufeagba, Benjamin Jimmy; Sanni, Tunde Abdulraham
    The modeling of outdoor path loss propagation is critical in the planning and construction of the Global System for Mobile Communication (GSM) coverage area. For GSM signal prediction at any location inside its service region, a precise forecast based on critical characteristics and a mathematical model is required. Numerous research findings on path loss propagation model forecast for GSM mobile networks conducted in various cities in Nigeria revealed that the COST 231-Hata model gives closer prediction to most of the practical measure path loss values. Based on the existing COST-23-Hata path loss model and outdoor measurements at 1800 MHz frequency range within Ilorin metropolis, this paper proposed a suitable path loss model. The developed model was used and validated in various locations throughout Ilorin city with the measured and COST-231 Hata models. The analysis of the results revealed that the developed model performed satisfactorily in terms of the closest path loss prediction to the practical measure path loss values at all study locations. It also has the lowest Square Root Means Error and Standard Deviation (SD) of any Base Station (BTS) tested in Ilorin, Nigeria. As a result, it is concluded that the newly developed AJ-Olu-1 model is more suitable for GSM 1800 network design and installation in Ilorin City, Nigeria, as well as other cities in Nigeria and other cities outside Nigeria with similar environments.
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    Assessment of Internet service Provider using UMTS Operators at the University of Ilorin Main campus
    (Faculty of Engineering, University of Nigeria, Nsukka, Nigeria, 2020) Akanni, Jimoh; Abdurrhaman, Isa; Alao, Rasaq; Thomas, Cornelius
    Over the years the need for mobile broadband had seen a great increment due to the demand of internet mobile users. In this research work, data size for Internet operation on UMTS mobile network operators on the University of Ilorin Campus was assessed. The study assessed three UMTS network operators using an Infinix T627 android smart phone and RantCell App. to measure the download and upload at the selected points on the University of Ilorin Campus. It was observed that the number of active subscribers with their relative position in a cell have a great effect on the performance of the networks and therefore, the authors recommend the need for the operators to improve their data sizes so as to enhance users’ satisfaction.
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    A control model of the operating head dynamics of Jebba hydropower system
    (Federal University of Technology, Minna, Niger Sate, Nigeria, 2019) Akanni, Jimoh; Ogunbiyi, Olalekan; Thomas, Cornelius; Omeiza, Issac; Olufeagba, Benjamin
    Electricity availability in Nigeria has been very poor over the years, underscoring the need for a better approach for managing generating resources. This paper presents the development of a dynamical model of the operating head of Jebba hydroelectric power plants for system studies and control system design. The mathematical model of the plant was developed from flow continuity conditions, some model parameters were obtained from the source while others were estimated from observations and analysis of the measured data. The developed dynamical equation was validated by comparing the response produced with values obtained by measurement. Upon integrating the model equation in Microsoft EXCEL VBA® environment, a deviation of 2% from measured values was observed. Operators can therefore use the model as a decision support system, while control engineers can find the model directly applicable for optimal and robust control system design for the station.
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    Development and Implementation of a Prototype Automatic Rain-Sensor Car Wiper System
    (Department of Pure & Industrial Chemistry, University of Port Harcourt, Nigeria, 2022-11) Akanni, Jimoh; OJO, Ayodapo Oluwasegun; Abdulwahab, Abdurasaq; Isa, Abdurrhaman Ademola; Ogunbiyi, Olalekan
    Various studies have been conducted over the years on how to reduce driver distractions while driving, but with little effort on the distraction that could be caused by manually operated wipers while driving whenever it rains. Drivers frequently take their hands off the steering to turn ON/OFF and adjust the wiper speed when driving during rain, which causes a loss of concentration and increases the risk of a car accident. This paper presents an automatic car wiper prototype system that adjusts the speed of the wiper based on the intensity of the rain. The system also includes an audio alert that warns the driver to stop driving during heavy rain. The rain sensor/intensity and servo motor; which regulates the wiper's speed, were interfaced by an ATMega328 (Arduino Uno A000066). It performed satisfactorily, with average response times of 0.78 seconds, 1.95 seconds, and 6 seconds for rainwater detection, increasing rain intensity, and no rain detection respectively. The wiper speed was 15 rpm at moderate rain intensity and 32 rpm at heavy rain intensity. The wiper average response time and speed shows that it is a system that eliminate delay as compared to manually operated car wiper system. The developed system will reduce driver distractions while driving thereby reduces the risk of a car accident. As a result, this system can be combined with new technologies seen in contemporary vehicles.
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    Development of a Compact and Accurate Auto-Update Digital Clock with Real-Time Location Display using Organic Light Emitting Diode and Crystal Oscillator
    (Department of Pure & Industrial Chemistry, University of Port Harcourt, Nigeria, 2022) Akanni, Jimoh; Abdulrasaq, Abdulwahab; Abdurrhaman, Isa; Ojo, Ayodapo
    Research has been going on for a lengthy time on digital clocks but with restraints to auto-updating based totally on location. The objective of the paper is to produce a portable and accurate auto-update digital watch (clock) that shows the real time and the current location of the user with the aid of crystal oscillator to generate clock pulses which interfaced with the GPS modules with organic light-emitting diode (OELD). The system was able to automatically update the co-ordinate of locations whenever the user moves from one place to another, It also auto-update time whenever the battery is removed and reinserted or when switched OFF and then switch ON after sometime. It also eliminate the stretch associated with time adjustment whenever the battery is down and replaced or when the watch is switched OFF and then ON. It performed satisfactorily and as a result, the system can be adapted and integrated to the new technology of modern watch as it can be adopted by the user to locate his/her position at any point in time.
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    Development of Face Recognition-Based Attendance System
    (Faculty of Natural and Applied Sciences (FNAS) and the Faculty of Computing and Information Technology (FCIT), Sule Lamido University, Kafin Hausa, Jigawa State, Nigeria, 2023-05) Chukwude, Okechukwu M; SURAJUDEEN-BAKINDE, Nazmat Toyin; Zakariyya, Sikiru Olayinka; Ogunsakin, Joy B; Akanni, Jimoh; Olayanju, Sunday Akinwale; Ehiagwina, Frederick O
    Lecture attendance management is usually tedious, and time-consuming and may be prone to errors or manipulations when done manually. Hence, in this work, a web application called RollCall was developed and tested, for use by both students and lecturers in the Faculty of Engineering at the University of Ilorin as a model to manage attendance. The system manages attendance by allowing the lecturers to create courses, and take and retrieve attendance records for the courses created. Student functionalities include uploading their face data, enrolling for courses, and retrieving attendance records for the courses in which they enrolled. Attendance is marked through face recognition technology implemented with Python, OpenCV and Sci-kit Learn. The web interface was implemented using HTML5, Twitter Bootstrap CSS framework and JavaScript. The findings revealed that RollCall effectively streamlined attendance management, making it easier for both students and lecturers to keep track of attendance records. The web application is user-friendly and enhances the overall academic experience by improving the accuracy and efficiency of attendance management.
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    Duty Cycle Analysis of Radio Spectrum Profile Utilization for Cellular Bands
    (Nigerian Institution of Professional Engineers and Scientists, 2020) Akanni, Jimoh; Abdurrhaman, Isa; Thomas, Cornelius; Alao, Rasaq; Adeshola, Abimbola
    Wireless technology offers more flexible and inexpensive ways of communication and with four key comparative advantages over the wired technology–increased efficiency, high availability, greater flexibility and mobility for users at a far better reduced cost of installation and maintenance [1]. The high increase in the growth of wireless devices with the present static radio spectrum management has created an inadequacy in the available radio spectrum [2], and presently the spectrum regulatory bodies are of the view that static spectrum management approach giving exclusive right of way to use licensed is still efficient [3]. The global monthly data traffic grew by about 69% from 1.5 exabyte in 2013 to 2.5 exabyte at the end of year 2014 and this is expected to reach up to 24.5 exabyte in 2019 and beyond that as forecasted by Cisco visual networking index [4]. This static allocation of radio spectrum is no longer adequate to grant access to the exponential growth of the wireless device because some portions of the radio spectrum are heavily used while the others are rarely used or not used at all; thus the inadequate sharing of the radio spectrum among users can lead to the opening of unwanted denial of service event [5]. In addition, the demand for wireless coverage, capacity, connectivity and services will continually expand and a critical barrier is the scarcity of the radio spectrum because it is fixed and cannot be expanded.
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    Dynamical control model of the cascaded Kainji-Jebba hydropower operating head
    (Published by Faculty of Engineering, Federal University Oye-Ekiti, Ekiti state, Nigeria, 2019) Akanni, Jimoh; Ogunbiyi, Olalekan; Thomas, Cornelius; Omeiza, Issac; Olufeagba, Benjamin
    Operation and design of control system for the cascaded Kainji-Jebba hydropower system poses a great challenge to researchers and engineers. The difficulties arose from the fact that the system is affected by several nonlinear interacting factors such as variations in inflows, stochastic factors that are weather related, availability of the turbo-alternators, and numerous other constraints that are influenced by the system dynamics. All these makes the mathematical representation of the system difficult. This paper presents the development of a dynamical model for the operation and optimal control of the operating heads of the cascaded system. The mathematical models were developed from energy conversion equation and Bernoulli’s equation. The model was calibrated and tuned using measured data. Upon validation by comparing the response of the model with measured head, a deviation within ±2% was observed, making it a good prediction of the system response and appropriate for control system design.
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    Enhancing Indoor Positioning Systems Accuracy with Optimal Placement of Wi-Fi Access Points
    (Tafila Technical University, Jordan, 2024-03) Isa, Abdurrhaman Ademola; Akanni, Jimoh; Abdulrahman, Amuda Yusuf; Alao, Rasaq Atanda
    The indoor positioning system (IPS) has generated a considerable amount of interest in recent times, and the prosperity of the system’s development is heavily reliant on its ability to accurately locate objects. The performance measure is significantly impacted by the location of access points (APs). However, the bulk of previous studies have tended to overlook the matter of optimal AP placement and efficient design for IPS due to the dependence on pre-existing installed APs, which were chiefly formulated for coverage objectives. In this investigation, an optimal placement function – which is reliant on mean and variance – has been developed using received signal strength (RSS) measurements data. The performance evaluation in this research is based on experimentation and compared with currently employed placement methods. The results indicate that the most optimal function value for the suggested method is 1.5714, which is substantially smaller than the values for rectangular, triangular, and triangular II, which are 12.468, 5.5364, and 8.5147, respectively. When the recommended placement strategy is employed instead of the existing ones, the weighted K-nearest algorithm (WKNN) for location error, using average RSS as the fingerprint radio map database, yielded a heightened degree of precision.
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    Introduction to Electrical and Electronics Engineering Discipline
    (OLAD PUBLISHERS, 2015-04) Akanni, Jimoh; Otuoze, Abdulrahaman; Adamariko, Clement; Ogunsakin, Joy; Mohammed, Obalowu
    Introduction to electrical and electronics engineering profession: Definition of electrical and electronics engineering. Specializations/ Options in electrical and electronics engineering.Use of various implements and equipment in electrical and electronics engineering for various operations/process.Prospects and job opportunities in electrical and electronics engineering as a profession. Relevant regulatory bodies and societies in electrical and electronics engineering.The role of electrical engineers in advancement of humanity.
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    Investigation of the unified rain attenuation prediction method with data from tropical climates
    (IEEE, 2014) Akanni, Jimoh; Abdulrahman, Yusuf; Olufeagba, Benjamin; Rahman, T. A; Islam, M.D.R; Abdulrahman, T. A; Amuda, S. A. Y
    The semi-empirical method recently proposed by Silva Mello and Pontes (SMP) for the prediction of rain attenuation in slant paths is investigated in this letter. The SMP method uses the simplified model of equivalent rain cell and the concept of an effective rain rate. However, substantial deviations were observed in SMP predictions when compared to the rain cell diameters derived from experimental data. The measured rain rates and attenuations were obtained from three tropical climates (Australia, and USM and IIUM both in Malaysia). The measured rain attenuation complementary cumulative distributions (CCDs) were also compared to SMP and the Rec. ITU-R P. 618-11. The test results show that the ITU-R model performs much better compared to SMP method in the three tropical climates.
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    Nonlinear control model and operational support system for the Kainji Hydroelectric Power System
    (Faculty of Engineering, University of Nigeria, Nsukka, Nigeria, 2019) Akanni, Jimoh; Ogunbiyi, Olalekan; Thomas, Cornelius; Omeiza, Issac; Olufeagba, Benjamin
    Over the past years, hydropower model and control were largely based on classical and linear transfer function, this was motivated by the available control system design techniques that were available and the desire to simplify the design procedure. Such a model is inadequate for dynamic study and design of hydropower station in the presence of uncertainties in the water head, discharge rate, elastic water effect, traveling wave effect, large variation power output and frequency. This research, therefore, focuses on developing a nonlinear model for the Kainji hydroelectric power station. The model relies on the energy conversion principles, inflows, discharge, evaporation rate and number of units on busbar. The parameters of the model were also estimated, and the model validated with an error within +1.4% to -3.6%. The model is expected to be used to determine the optimal control policies for the operation of the station and the release of water to the downstream.
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    Prediction of Run-off Time for Water Film Thickness and the Effects on Wet Antenna Attenuation
    (FUOYE Journal of Engineering and Technology (FUOYEJET), 2023-03) Abdulrahman, Amuda Yusuf; Salaudeen, Kazeem; Zakariyya, Sikiru Olayinka; Akanni, Jimoh; Afolabi, A. S; Ajiboye, A . T
    Most of the reported works on wet antenna attenuation (WAA) focused on the estimation of the water-layer thickness without considering the time taken to be drained off from the reflector (that is, the runoff time). Simulated rain experiments were conducted on a parabolic antenna with a diameter of 0.6 m. Based on measurement data, this study examined the parametric effects of rain rate on water film thickness and runoff duration, and then associated those findings to the overall WAA. It was found that WAA increases with the water film thickness, while decreasing with the runoff time. More so, the latter quantity both increase with the antenna dish size. The study is useful in accounting for the WAA component in the overall link budget design for adequate service delivery.
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    Propagation Loss Determination of GSM Signal Strength in Selected Buildings in Ilorin, Nigeria
    (University of Maiduguri, Nigeria, 2021) Akanni, Jimoh; Oraiye, Oluwatosin; Abdurrhaman, Isa; Ogunbiyi, Olalekan
    GSM signal building penetration loss is a problem often encountered by subscribers inside a building. As a result of building penetration loss, poor reception and signal outages often occur in many indoor locations and this accounts for increased attenuation of received signal strength of a cellular network signal when a subscriber with a mobile phone moves from outdoor to indoor. The study assessed the GSM signal penetration loss in thatched, wooden, block, mud and zinc buildings. Three network providers named A, B and C was used for the experiment. A low budget but very effective equipment (Two Tecno Pouvoir 3 plus Android phone) was used as the measurement tool. It was loaded with Network Signal Info application developed by KAIBITS Software GmbH installed software and positioned inside and outside the building to record indoor and outdoor GSM signal strength respectively for the three service providers in Ilorin, Nigeria. The results were then analyzed in order to determine and compare the path loss introduced by each of the selected buildings. This process was repeated for all the selected buildings, and the measurement was carried out for 6 months. The findings revealed that the outdoor signal strength was higher than the indoor signal strength for all the selected buildings; it also revealed that penetration loss is likely to be a function of the material used in the construction of the buildings. Zinc building has the highest penetration loss of 12.0 dBm and thatched building has the least penetration loss of 2.6 dBm. Information from this research will assist in selection of building materials for good indoor cellular network signal …
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    A steepest descent algorithm for the optimal control of a cascaded hydropower system
    (Institute of Advanced Engineering and Science, 2020) Akanni, Jimoh; Ogunbiyi, Olalekan; Thomas, Cornelius; Omeiza, Issac; Olufeagba, Benjamin; Ogundepo, O.Y.
    Optimal power generation along the cascaded Kainji-Jebba hydroelectric power system had been very difficult to achieve. The reservoirs operating heads are being affected by possible variation in impoundments upstream, stochastic factors that are weather-related, availability of the turbo-alternators and power generated at any time. Proposed in this paper, is an algorithm for solving the optimal release of water on the cascaded hydropower system based on steepest descent method. The uniqueness of this work is the conversion of the infinite dimensional control problem to a finite one, the introduction of clever techniques for choosing the steepest descent step size in each iteration and the nonlinear penalty embedded in the procedure. The control algorithm was implemented in an Excel VBA® environment to solve the formulated Lagrange problem within an accuracy of 0.03%. It is recommended for use in system studies and control design for the optimal power generation in the cascaded hydropower system.
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    z-Normalized Download and Upload throughput on UMTS Networks
    (Jaye Publications, 2020) Akanni, Jimoh; Abdurrhaman, Isa; Thomas, Cornelius; Alao, Rasaq; Adeshola, Abimbola; Abdullahi, A
    Wireless data networks as become the most efficient and reliable telecommunication services for providing internet services to most people around the globe. Over 50 billion wireless devices is expected to be connected by the end of 2020, all of which are likely going to demand access to the internet making the demand for wireless connectivity, coverage, capacity and services to continually expanding; all of which can be evaluated based on end user satisfaction. The end users demand reliable, accurate, consistent tools and methodology that help them to measure the download and upload throughput; also the operators are interested to predict the future throughput based on historical data from the past. In this research, we come up with a methodology to effectively and accurately measure the download and upload of the UMTS data network in a real wireless environment from end users point using three selected operators on the University of Ilorin main Campus. We normalized mathematically the measured value and compare the performance with the minimum value for UMTS wireless network and there after compare each operator to provide the end user with an effective decision tool in order to acquire maximum satisfaction. Based on the result we suggested an app should be develop similar to that used in the study and then the measurement period should be increased for better prediction by operators and to provide more data information for the end users to aid their decision thereby increasing their satisfaction