Browsing by Author "Zakariyya, O . S"

Now showing 1 - 11 of 11
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    Design and Construction of an Arduino Based Solar Power Parameter Measuring System with Data Logger
    (Faculty of Engineering, University of Maiduguri, Maiduguri, Nigeria, 2020-06) Ibrahim, O; Babatunde, A. Y; Boluwatife, A. J; Afolayan, M. A; Ogunbiyi, O; Madugu, I. S; Zakariyya, O . S
    Accurate monitoring and measurement of solar photovoltaic panel parameters are important for solar power plant analysis to evaluate the performance and predict the future energy generation. There are always challenges of getting such data readily available due to huge amount of money to be spent on state of the art equipment or the purchase of reliable satellite weather data. This study aimed at the development of a cost-effective parameter-measuring system for a solar photovoltaic panel using Arduino microprocessor board. The systems measure five parameters, including voltage, current, light intensity, temperature, and pressure. The hardware circuit was designed to link different sensors with the Arduino board and the measured data were in turn were documented into a computer for further analysis. The accuracy of the constructed device was ascertained by comparing the measured parameters with that of conventional standard measuring instruments which shows good agreement. The measured parameters show that the output energy generation from solar photovoltaic panel largely depends on the solar irradiance and temperature.
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    Design of a Bimodal Home Automation System using ESP8266 and ATMEGA328 Microcontroller
    (Published by Department of Computer Engineering, Universitas Sriwijaya (Indonesia), 2017-10) Zakariyya, O . S; Salami, A. F; Alabi, O. O; Usman, A. M
    Home automation systems are garnering increasing popularity and widespread use due to the relative ease of domestic management and comparatively high return on technology investment tied to its adoption. However, Nigeria and other emerging ICT economies are yet to fully actualize and maximize the inherent potential of these smart home technologies due to endemic challenges associated with poor infrastructure, erratic power supply and unreliable Internet connectivity. These challenges necessitate an innovative paradigmatic shift that could provide a pragmatic technological solution suitable to the context of Nigeria and other developing climes. For most smart home systems in this research context, the status quo is based on choosing whether the design would be for short- or long-range communication network. Short-range designs which are usually realized with Bluetooth technology suffer from limited range issues while poor connectivity, bandwidth and latency issues are some of the problems plaguing Wi-Fi-based long-range designs. Consequently, this research presents a hybrid adaptive architecture that combines desirable features of both short- and long-range modes. The proposed smart home system is based on using embedded systems which use mobile application to send messages to ESP8266 Wi-Fi module. Together with notifications received from the monitoring unit, these messages are parsed by Arduino's ATMEGA328 microcontroller from where instruction codes are sent for controlling the load by switching ON or OFF various relays connected to the load.
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    Design of a Low-Cost Controller for Smart Prepaid Meters
    (Published by Department of Electrical Engineering, Ahmadu Bello University Zaria, 2020-09-25) Zakariyya, O . S; Olayanju, S. A; Abara, I. E; Salami, A. F; Sadiq, B. O; Alao, R. A
    This paper presents the design and implementation of a low-cost, low-complexity, energy-efficient controller with remote recharge and load shedding capability. The system is recharged remotely by an SMS sent to a registered SIM card in a GSM module, a voltage and current sensor measures the load power usage, a microcontroller is used to keep track of the power consumption and signals the relay in order to execute the load shedding when the predetermined threshold is reached. The whole system is powered by a power supply unit which converts the 220V AC from the supply mains to a 5V DC. After the design and upon testing, the energy measurement circuit worked with minimal error, the relay switch executed the load shedding function without delay, the GSM showed good network reception and the operation of the system was cheap and simple thus satisfying the objective of the research.
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    Design of Multiband and Ultrawidband Circular Fractal Antenna with Partial Ground Plane
    (Published by Federal University Wukari, Taraba State, 2018-10) Zakariyya, O . S; Uyguroglu, R; Sadiq, B. O
    Due to advancements in communication technology, there is an increase in the demand of small size, low cost, multiband and ultra-wideband antennas. With a view to address these demands, a fractal design was employed in this study. Despite the advantages provided by these antennas, performance enhanced further by using a partial ground plane. This research work presents an antenna which is based on the well-known Sierpinski Carpet fractal with iteration factor of 1/3. A multiband circular patch antenna using third order Sierpinski Carpet was designed to operate at 1.88GHz. The proposed antenna was modified with a partial ground structure to achieve ultra-wideband behaviour with a bandwidth of 8.18GHz at centre frequency of 2.54GHz. The antenna was simulated using three dimensional finite integration time domain commercial software microwave studio
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    Didactic Performance Review of Selected Topology-Aware Routing Strategies for Clustering Sensor Networks
    (Faculty of Engineering & Technology, University of Ilorin, Ilorin, Nigeria, 2019-12) Salami, A . F; Zakariyya, O . S; Amuda, Sulyman A. Y; Sadiq, B. O; Abdulrahman, O. A
    ABSTRACT: In this paper, cluster-based routing (CBR) protocols for addressing issues pertinent to energy consumption, network lifespan, resource allocation and network coverage are reviewed. The paper presents an in-depth performance analysis and critical review of selected CBR algorithms. The study is domain-specific and simulation-based with emphasis on the tripartite trade-off between coverage, connectivity and lifespan. The rigorous statistical analysis of selected CBR schemes was also presented. Network simulation was conducted with Java-based Atarraya discrete-event simulation toolkit while statistical analysis was carried out using MATLAB. It was observed that the Periodic, Event-Driven and Query-Based Routing (PEQ) schemes performs better than Low-Energy Adaptive Clustering Hierarchy (LEACH), Threshold-Sensitive Energy-Efficient Sensor Network (TEEN) and Geographic Adaptive Fidelity (GAF) in terms of network lifespan, energy consumption and network throughput.
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    Dual Band Fractal Antenna Design for Wireless Application
    (Published by Department of Computer Engineering, Universitas Sriwijaya (Indonesia), 2016-10) Zakariyya, O . S; Sadiq, B. O; Olaniyan, A. A; Salami, A. F
    The objective of this paper was to design and analyse a dual wide band compact antenna for wireless application. Microstrip patch antenna limitation can be overcome by using fractal geometry. The proposed antenna was designed with a radius of 15mm on a FR4 lossy substrate with relative permittivity of 4.4 and loss factor of 0.025. Measurement result showed that the antenna has a dual band of operation with bandwidth for return loss below -10dB of 1.84GHz (2.2GHz-4.07GHz) and 2GHz (6GHz-8GHz) which can be applied to wireless local area network (WLAN) and Ultra wide band applications.
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    Effects of Ionospheric Scintillation on Communication Systems: GPS and Satellite
    (Published by Begell House Inc, 2017) Ajiboye, A; Abdulrahman, A. Y; Falade, A. J; Ajiboye, A. T; Zakariyya, O . S; Rahman, T. A
    The increasing use of satellite communication and GPS operating at 3 GHz and above can be affected by scintillation. Therefore, the knowledge of scintillation, as well as its effects on communication systems (satellite and GPS) is important in the planning and designing of communication systems links. In the past, most of the scintillation prediction models were based on data collected from temperate climates. These models do not perform well in equatorial and tropical climates due to uniform temperature, high humidity and abundant rainfall. Due to the unavailability of the required experimental setup as a result of huge capital cost involved, the measured scintillation fade and enhancement data were extracted from the reported works in JCSAT3 beacon, Indonesia. The results of predicted and measured scintillation intensity (fade and enhancement) were compared by using a few scintillation models. The results of the statistical analysis show that the Otung model is most suitable for scintillation fade and enhancement predictions with the least %RMS errors.
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    A feasibility study of cluster-based energy harvesting aware routing protocol for body nanosensor network
    (IEEE Computer Society Nigeria Section, 2020-08-25) Zakariyya, O . S; Yaro, A. S; Usman, A. D; Tekanyi, A. M. S; Sani, S. M
    Wireless nanosensor network (WNSN) are networks of interconnected nano-nodes communicating at terahertz frequency. The nano-node range of communication as well as the overall performance of the WNSN is affected mainly by the path loss of the terahertz frequency band and also by the very limited nano-nodes resources and capacity. For that reason, there is need for a suitable routing protocol that will guarantee multihop communication in WNSN. Clustering technique has been proving to be a cost-effective method to provide successful communication for body WNSNs. However, the nanonode elected as the nano-cluster head diminishes its energy dynamically. This will result into loss of monitored data in the cluster and reduce the reliability of the network. Existing clustering techniques in WNSN proposed for health care application did not take the energy exhaustion of the nano-cluster head into consideration. Hence, this work gives a review of work done to date on WNSN routing protocol, identifies their weaknesses and then suggest the implementation of an energy harvesting aware protocol that employs cluster-based hierarchical architecture by considering two different scenarios (using a back-up cluster head technique and using a wireless energy transfer technique) with a view to ensuring lifetime operation of the nano-node, minimize packet loss and conserving energy.
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    A High Gain Patch Antenna Array for 5g Communication
    (published by IEEE Xplore, 2019-10-17) Zakariyya, O . S; Sadiq, B. O; Adebayo, M. A; Salami, A. F; Usman, A. M; Afolayan, M. A
    This research proposed a 1X4 patch antenna array for 5G Communication. The proposed antenna was designed to resonate at 28GHz frequency band. CST Microwave studio was used for the simulation of the antenna by employing Roger RT 5880 LZ with thickness and permittivity 0.762mm and 1.96 respectively as the substrate. The antenna was fed using a quarter-wave transformer to match its impedance to 50 ohms. The single patch resonates at 27.9GHz frequency with; a bandwidth of 1.87GHz, and a gain of 7.79dB. The addition of another element brought about an increment in the above-mentioned values. Furthermore, the implementation of the four element array configuration brought about the significant enhancement of values for bandwidth and antenna gain with maximum achievable gain of 13.5 dB. The design procedure, structure and simulation of the antenna are discussed in this paper.
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    Modified Edge Fed Sierpinski Carpet Miniaturized Microstrip Patch Antenna
    (Published by Faculty of Engineering, University of Nigeria, Nsukka, (UNN) Nigeria, 2016-07) Zakariyya, O . S; Sadiq, B. O; Abdulrahman, O . A; Salami, A. F
    This paper presented a modified edge fed Sierpinski carpet microstrip patch antenna for antenna miniaturization.The proposed design was etched as Sierpinski carpet to lower the antenna resonant frequency, which is used to reduce the conventional patch antenna size. After the Sierpinski carpet second iteration, the proposed antenna was modified by replacing the rectangular slot in the middle of the patch with a circular slot. Simulation results showed that the proposed antenna achieved 46.5% size reduction when compared with the main patch antenna without affecting the resonant frequency and radiation patterns.
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    On the Accuracy of Edge Detectors in Number Plate Extraction
    (Published by Vilnius University and University of Latvia, 2019) Sadiq, B. O; Ochia, E. O; Zakariyya, O . S; Salami, A. F
    Edge detection as a pre-processing stage is a fundamental and important aspect of the number plate extraction system. This is due to the fact that the identification of a particular vehicle is achievable using the number plate because each number plate is unique to a vehicle. As such, the characters of a number plate system that differ in lines and shapes can be extracted using the principle of edge detection. This paper presents a method of number plate extraction using edge detection technique. Edges in number plates are identified with changes in the intensity of pixel values. Therefore, these edges are identified using a single based pixel or collection of pixel-based approach. The efficiency of these approaches of edge detection algorithms in number plate extraction in both noisy and clean environment are experimented. Experimental results are achieved in MATLAB 2017b using the Pratt Figure of Merit (PFOM) as a performance metric