Journal Articles http://repository.fuoye.edu.ng:80/handle/123456789/68 2026-04-16T23:21:21Z 2026-04-16T23:21:21Z IJEMARU, GERALD KELECHI OLAITAN, AKINSANMI http://repository.fuoye.edu.ng:80/handle/123456789/1140 2016-01-27T04:40:02Z 2015-02-01T00:00:00Z

Title: A CONCISE APPROACH TO ELECTROMAGNETIC FIELDS AND WAVES Authors: IJEMARU, GERALD KELECHI; OLAITAN, AKINSANMI Abstract: As the name implies, “A Concise Approach to Electromagnetic Fields and Waves” is an outgrowth of the lecture notes prepared for Electromagnetic Fields and Waves I & II. Intended primarily as a text book for students at the advanced undergraduate or beginning graduate level, it is expected that the book will be useful for research workers too. It provides a thorough treatment of the theory of electrodynamics, mainly from a classical field theoretical point of view, and includes such things as electrostatics, electromagnetic waves and their propagation in vacuum and in media. With the parameters and terms that made up the text clearly defined, this book is based on classical electromagnetism that deals with the study of static charges and their electric fields, the magnetic field developed by motional charges and the electromagnetic wave that treated the dynamism of electron in rapidly time-varying condition. The book – “A Concise Approach to Electromagnetic Fields and Waves” consists of eight chapters. Chapter one is an introduction to electromagnetic fields and waves. This chapter x-rays the basic concepts about electromagnetics, the discovery of electromagnetic field, Maxwell’s equations, electromagnetic spectrum and the fundamental characteristics of EM waves. Chapter two looks into a review of vector analysis, which includes vector algebra and vector calculus, while chapter three presents Electrostatics and its applications as well as charge distribution in a conductor, Coulomb’s law, electric field intensity, and electric potential. In chapter four, there is a review of EM laws in the integral form, which houses Gauss’s law, Ampere’s law, Faraday’s law, magnetic field in and around a current-carrying conductor, conduction and displacement current density, derivation of Maxwell’s equation from Ampere’s law, Faraday’s law and Gauss’s law. Wave equation derived from Maxwell’s equation is presented in chapter five, while chapter six looks into divergence and stoke’s theorems. This chapter comprises time harmonic waves, poynting vector (s), media of plane waves, wavelength of wave in free space, wave propagation in free space and in perfect dielectric, etc. Transmission line is presented in chapter seven and lastly, chapter eight contains miscellaneous problems and their solutions. This book tries to build a good background for the targeted students and set them to the context of electromagnetism without over assumption. To this end, a student of electromagnetism, studying for the basic principles of and building blocks for communication and power system engineering, will find this text an invaluable material and relief for hitherto dreaded but all important course in Electrical and Electronics Engineering. Description: This book – “A Concise Approach to Electromagnetic Fields and Waves” covers the required breadth of the subject matter as prescribed by NUC curriculum for engineering students of Universities and Polytechnics. The area on fields particularly opens the study into field theories needed in engineering for proper understanding of basic electrical engineering ideas. An in-depth background of Electromagnetics as applied to wave theory and practice has been laid. The book is recommended to students not only in electrical and communication engineering but also in physical science.

2015-02-01T00:00:00Z IJEMARU, GERALD KELECHI OLAITAN, AKINSANMI BABARINDE, ADEDAYO KAYODE http://repository.fuoye.edu.ng:80/handle/123456789/1139 2016-01-27T03:12:52Z 2015-11-25T00:00:00Z

Title: Reliability Assessment of Uninterruptible Power Supply (UPS) System for Medical Operations in Zaria Kaduna State Authors: IJEMARU, GERALD KELECHI; OLAITAN, AKINSANMI; BABARINDE, ADEDAYO KAYODE Abstract: The paper presents the reliability assessment of Uninterruptible Power Supply (UPS) systems for medical operations in Zaria. The part stress method was used to assess the reliability. Data on the failure of an APC BK650MI UPS model were used as a case study. Special consideration was given to factors like environment, quality of utility and service personnel, and the results showed that there is a relatively low reliability of the system, for medical operations in Zaria than the country for which the system was designed (USA).

2015-11-25T00:00:00Z IJEMARU, GERALD KELECHI ADAMU, MURTALA ZUNGERU YADUMA, SANDRA BABARINDE, ADEDAYO KAYODE OLUSUYI, KEHINDE OLUWAFEMI http://repository.fuoye.edu.ng:80/handle/123456789/1138 2016-01-26T20:41:15Z 2014-01-01T00:00:00Z

Title: Design and Construction of an Automatic Triggered Bell Ringer Circuit Authors: IJEMARU, GERALD KELECHI; ADAMU, MURTALA ZUNGERU; YADUMA, SANDRA; BABARINDE, ADEDAYO KAYODE; OLUSUYI, KEHINDE OLUWAFEMI Abstract: This research work deals with the design and construction of an automatic triggered bell ringer circuit. Several previous attempts have been developed on intruder alert and a motion detection system, complex systems that operate excellently well. The automatic triggered bell ringer circuit integrates knowledge of these previous models and utilizes more readily available components. It also introduces the use of two sensors, thereby increasing its sensitivity. Major components used in the work are the Force and Light sensors, sensors that depict the concepts of pressure and light resistivity/conductivity respectively, and a laser beam directly projected permanently on the light sensor’s surface. A force exerted on the Force sensor triggers a buzzer alarm and likewise, an obstruction in the path of the laser triggers the buzzer alarm. Once there is pressure exerted on the Force sensor, the resistance tends to infinity and voltage dropped across it biases the diode and transistor and the voltage reaching the buzzer triggers it. Likewise, the resistance of the light sensor tends to infinity when in darkness and the voltage dropped across it also biases a diode and transistor and triggers on the buzzer alarm. The work has been tested and seen to have a higher sensitivity, and is much cheaper than its counterparts.

2014-01-01T00:00:00Z IJEMARU, GERALD KELECHI OLEKA, EMMANUEL UCHENDU NGHARAMIKE, ERICMOORE TOCHUKWU NJOKUOCHA, KENNETH IKECHUKWU UDUNWA, AUGUSTINE IKENNA http://repository.fuoye.edu.ng:80/handle/123456789/1137 2016-01-26T20:03:20Z 2014-11-01T00:00:00Z

Title: Inter-Cell Interference Mitigation Techniques in a Heterogeneous LTE-Advanced Access Network Authors: IJEMARU, GERALD KELECHI; OLEKA, EMMANUEL UCHENDU; NGHARAMIKE, ERICMOORE TOCHUKWU; NJOKUOCHA, KENNETH IKECHUKWU; UDUNWA, AUGUSTINE IKENNA Abstract: As LTE (Long Term Evolution) networks proliferate and network traffic increases, LTE operators face the problem of interference. Because LTE spectrum is limited, most operators deploy single frequency networks to maximize capacity. However, while single frequency networks increase spectral efficiency, they also increase the potential for interference. Interference is highly unpredictable and depends on various factors such as channel conditions, traffic from other terminal and noise. Interference occurs between various equipment in a heterogeneous LTE-A access network and is a threat to the technology of wireless network. Hence, this research work seeks to analyze the various techniques for combating interference in LTE–Advanced access network per unit area using different combination of methods. Network-based interference mitigation solutions are not yet available to address the interference problems of today’s LTE networks. However, Terminal-based interference solutions are available today as they offer operators a powerful weapon to combat interference. The introduction of Femtocell to users has also made interference mitigation scheme achievable. The Femtocell interference mitigation technique mitigates the interference between network components such as Macro-cell and Femtocell in a heterogeneous LTE-A access network. The work also emphasizes the importance of heterogeneous network in a wireless communication and the basic sources of interference and their mitigation techniques in this kind of network. The implementation of all the suggested mitigation techniques and power control formula as explained in this work has been proposed to target the performance of heterogeneous LTE-Advanced access network. This, as a result, will improve the signal quality of the received signal, and end users will experience higher throughput and better service continuity, and LTE operators will improve coverage and increase the capacity of their networks.

2014-11-01T00:00:00Z Adefarati, Temitope Babarinde, Adedayo Oluwole, Ayodele Olusuyi, Kehinde http://repository.fuoye.edu.ng:80/handle/123456789/1053 2015-09-22T14:29:00Z 2014-10-17T00:00:00Z

Title: Reliability Evaluation of Ayede 330KV/132KV Substation Authors: Adefarati, Temitope; Babarinde, Adedayo; Oluwole, Ayodele; Olusuyi, Kehinde Abstract: Reliability is an analytical tool used to measure the ability of a power system to perform a function when required for a specified period of time in particular environment and conditions. Reliability analysis is a vital tool for critical identification of sensitive components of the electrical power systems that need more attention for better improvement and at the same time to increase the system availability. The aim of this research work is to carry out reliability assessment of electrical power system by using some reliability indicators. Hence this work presents a research on reliability assessment of 330/132KV substation by using Ayede 330/132KV substation as a case study. Ayede 330/132KV substation feeds six different 132/33KV substations, such as Jericho, Ijebu ode, Ibadan North, Sagamu, Ayede and Iseyin. In this study different parameters that determined optimum operation of a power system such as SAIDI, CAIDI, SAIFI, CAIFI, CIII, MAIFI and ASAI were deduced.

2014-10-17T00:00:00Z Oluwasogo, Emmanuel Osunde, Davidson Babarinde, Adedayo Okakwu, Ignatius http://repository.fuoye.edu.ng:80/handle/123456789/1052 2015-09-22T14:18:23Z 2015-01-31T00:00:00Z

Title: The Dynamic Modelling and Electrical Profiles of Three-Phase Induction Motor Usunig MATLAB Program Authors: Oluwasogo, Emmanuel; Osunde, Davidson; Babarinde, Adedayo; Okakwu, Ignatius Abstract: This paper addresses the dynamic behaviour of 3-φ induction machines based on a quality mathematical model and computer program simulation in a stationary reference frame to avoid the complexity involved in the course of solving time-varying differential equations obtained from the dynamic model. Laplace transform of the dynamic equations was carried out to derive analytical solutions the current variables. 4th 0rder Runge-Kutta method is adopted to give numerical solution of the dynamic model. The basic electrical characteristics of the 3- φ induction machine are considered in the two-phase approximate equivalent model. The graphical curves were obtained from MATLAB program code developed.

2015-01-31T00:00:00Z Ofusori, Temidayo J. Ukagu, Stephen N Guiawa, Mathurine Ezomo, Patrick I http://repository.fuoye.edu.ng:80/handle/123456789/1046 2015-09-22T13:56:16Z 2014-07-01T00:00:00Z

Title: COMPARATIVE ANALYSIS OF COMMUNICATION AND INTERNET TRANSMISSION MEDIA Authors: Ofusori, Temidayo J.; Ukagu, Stephen N; Guiawa, Mathurine; Ezomo, Patrick I Abstract: This work takes a view on three different communication and internet transmission media commonly used in telecommunication. The structure and working principle is reviewed alongside the recent developments in cabling standards and applications. Comparison is made based on the properties of the individual medium, signal impairments and other factors that affect transmission media in a network. It also demonstrates how problems due to signal impairments can be mitigated and how various media can be optimized in a network.

2014-07-01T00:00:00Z Ofusori, Temidayo J. Ukagu, Stephen N. Ezomo, Patrick I. Guiawa, Mathurine http://repository.fuoye.edu.ng:80/handle/123456789/1043 2015-09-22T13:45:06Z 2014-05-01T00:00:00Z

Title: MOBILE BROADBAND SPEED AND DATA VOLUME ANALYSIS Authors: Ofusori, Temidayo J.; Ukagu, Stephen N.; Ezomo, Patrick I.; Guiawa, Mathurine Abstract: This work carries out mobile broadband speed and data volume analysis of three GSM service providers (MTN, GLO and AIRTEL) in Okada, Edo State of Nigeria. The download and upload speeds as well as the data volume were investigated under certain conditions. The modems for the three different GSM Networks were made available while a software (NETWORX) was used to monitor the traffic. The data and graphical representation of each of the service provider’s speed and data volume was presented over a period of time. A critical analysis of the data and graphs showed that MTN network provides better service irrespective of the condition followed by GLOBACOM and AIRTEL networks in Okada town.

2014-05-01T00:00:00Z Babarinde, Adedayo Adefarati, Temitope Oluwole, Ayodele Olusuyi, Kehinde http://repository.fuoye.edu.ng:80/handle/123456789/1040 2015-09-22T13:36:04Z 2014-06-30T00:00:00Z

Title: Effects of Electrical Variation on the Dynamic Behaviour of Two-Phase Induction Motor Authors: Babarinde, Adedayo; Adefarati, Temitope; Oluwole, Ayodele; Olusuyi, Kehinde Abstract: This research work seeks to analyse the performance of a two-phase induction motor using dynamic model based on MATLAB. The 4th order Runge-Kutta was used for the solution of this dynamic model. The modelling and simulation will be strictly for Two-phase induction motors used in low power applications. Measured and simulated results would be discussed and correct mitigation techniques would also be recommended .Future work within the scope of this research work would also be discussed. With the growing concerns about low-cost operation and efficient use of energy, Two-Phase induction motors have gained interest in low-power applications, especially for domestic or commercial applications where a three-phase power supply is not available. This result from this research work would help improve the design of two-phase induction motor used in the applications above.

2014-06-30T00:00:00Z Akinsanmi, Olaitan Adegboye, B.A Olarinoye, G.A Soroyewun, M.B http://repository.fuoye.edu.ng:80/handle/123456789/1034 2015-09-22T13:15:21Z 2011-01-01T00:00:00Z

Title: Neuro-Fuzzy Based Modeling of Electrostatic Fields for Harmattan Season in Zaria Authors: Akinsanmi, Olaitan; Adegboye, B.A; Olarinoye, G.A; Soroyewun, M.B Abstract: This paper presents a Neuro-Fuzzy based modeling of electrostatic fields for harmattan season in Zaria, Nigeria based on online based data capturing mechanism, which involved the use of a data acquisition system interfaced with a digital electrostatic field strength meter (model 257D) and a computer system. The acquired electric field data were captured by the computer using the Microsoft Office Excel Program for twenty-four months (February 2007 – February 2009). The focus of the analysis is determining the effect of environmental factors such as temperature, pressure and relative humidity on the static electric field during the harmattan season. The plots of the electrostatic field against the variation of the environmental factors were used as the qualitative analytical tools and yielded a non-linear relationship. The data was analyzed using Neuro-Fuzzy technique, which is a hybrid intelligent system combining the benefits of computational techniques of Fuzzy Logic and Artificial Neural Networks. The result of the analyses yielded good neural statistical values of Root Mean Square (RMS) of 0.32, Average Absolute Error of 0.18, and Pearson R value of 0.96 for the harmattan scenario, which are reflections of a good model. The result was further buttressed by the 3D plot of the Neuro-Fuzzy based modeling of the experimental parameters. With the insignificant values of the RMS and Average Absolute value, the empirical model gave a fairly good prediction which could be relied upon to predict the electrostatic fields during harmattan in Zaria, Nigeria.

2011-01-01T00:00:00Z Akinsanmi, Olaitan Bajoga, B.G Abdoulie, M.S.T Abdullahi, S.Y http://repository.fuoye.edu.ng:80/handle/123456789/1030 2015-09-22T13:04:45Z 2011-01-01T00:00:00Z

Title: Neuro-Fuzzy Based Modeling of Electrostatic Fields for Non- Harmattan Season in Zaria Authors: Akinsanmi, Olaitan; Bajoga, B.G; Abdoulie, M.S.T; Abdullahi, S.Y Abstract: This paper presents a Neuro-Fuzzy based modeling of electrostatic fields during non-harmattan season in Zaria, Nigeria based on the on-line data capturing mechanism, which involved the use of a data acquisition system interfaced with a digital electrostatic field strength meter (model 257D) and a computer system. The acquired electric field data are captured by the computer using the Microsoft Office Excel Program for twenty- four months (2007 - 2009). The focus of the analysis is determining the effect of environmental factors such as temperature, pressure and relative humidity on the static electric field during the non-harmattan season. The plots of the electrostatic field against the variation of the environmental factors were used as the qualitative analytical tools and yielded a non-linear relationship. The data was analyzed using Neuro-Fuzzy technique, which is a hybrid intelligent system combining the benefits of computational techniques of Fuzzy Logic and Artificial Neural Networks. The result of the analyses yielded good neural statistical values of Root Mean Square (RMS) of 0.35, Average Absolute Error of 0.23, and Pearson R value of 0.94 for the non-harmattan scenario, which are reflections of a good model. The result was further buttressed by the 3D plot of the neuro- Fuzzy based modeling of the experimental parameters. With the insignificant values of the RMS and Average Absolute value, the empirical model gave a good prediction which could be relied upon to predict the electrostatic fields during non-harmattan in Zaria, Nigeria.

2011-01-01T00:00:00Z ADETOYE, ARIBISALA KEHINDE, OLUSUYI http://repository.fuoye.edu.ng:80/handle/123456789/1027 2015-09-22T13:01:20Z 2014-11-01T00:00:00Z

Title: Design of an Employee Management System (A Case Study of National iron Ore Mining Company, Itakpe) Authors: ADETOYE, ARIBISALA; KEHINDE, OLUSUYI Abstract: Most of the contemporary Information systems are based on the Database technology as a collection of logically related data, and Database Management System (DBMS) as a software system allowing the users to define, create, maintain and control access to the database. The process of constructing such kind of systems is not so simple. In this paper, A database management system was developed to manage the staff data of the National Iron Ore Mining Company, Itakpe, Kogi State, Nigeria. The system developed is called Employee Management System. It consists of functionally related GUI (Graphical User Interface) and a database. The application programme is between the users and the database, where the data is stored for reliability, flexibility and functionality. The programming tool includes Microsoft visual studio 2010 platform and C- Sharp (C#) as the language. It involves a mutual development of application program and a database. The software was tested and found effective for the company. It is recommended for large organizations and establishments.

2014-11-01T00:00:00Z OLUSUYI, KEHINDE OLUWOLE, SUNDAY OLUWOLE Adefarati, Temitope BABARINDE, ADEDAYO KAYODE http://repository.fuoye.edu.ng:80/handle/123456789/1018 2016-02-02T10:43:03Z 2014-04-10T00:00:00Z

Title: A fault analysis of 11kv distribution system (a case study of ado Ekiti electrical power distribution district) Authors: OLUSUYI, KEHINDE; OLUWOLE, SUNDAY OLUWOLE; Adefarati, Temitope; BABARINDE, ADEDAYO KAYODE Abstract: The aim of this research work is to carry out fault analysis of 11KV distribution power system. Electric power is an essential facilitator for sustainable development of the modern nation state. While Nigeria is reported to suffer from severe shortages of electric power the condition of some of its newer constitutional units are unknown. In this work, electric power infrastructure and energy availability is studied for Ado-Ekiti, the principal economic and political hub of Ekiti State. During the study, the condition of all relevant equipment for power distribution at the 11 kV level was assessed. Power availability was also considered by collecting necessary data that had to do with energy supplied, faults and other outages. It was discovered that the distribution lines were in a rather poor state with as many as 25% of the poles not meeting a condition of "goodness", 33% of cross-arms being broken or unsatisfactory, about 10% of the insulators defective and almost 40% of the span not complying with standards. Hence this work presents a research on fault analysis of Ado Ekiti distribution power system.

2014-04-10T00:00:00Z Dare-Alao, Damilola Osakpolor, Esosa Stephen http://repository.fuoye.edu.ng:80/handle/123456789/977 2015-09-21T11:30:23Z 2014-02-12T00:00:00Z

Title: GEOSPATIAL MODELING OF ELECTRICITY DISTRIBUTION NETWORK IN IFE CENTRAL LOCAL GOVERNMENT AREA, OSUN STATE, NIGERIA Authors: Dare-Alao, Damilola; Osakpolor, Esosa Stephen Abstract: Electric utilities have a need to keep a comprehensive and accurate inventory of their physical assets, both as a part of normal service provision (extending the network, undertaking maintenance, etc.) and as a part of their obligation to inform third parties about their facilities. Complexity of electrical distribution power system is a good reason for introducing new information technology - GIS (Geographic Information System) that carries out complex power system analyses (e.g., fault analysis, optimization of networks, load forecasting) in acceptable amount of time. In pursuance of an understanding of the electricity distribution network, the Geographic Information Technology approach was adopted. GIS provides a better scenario in the management and monitoring of electricity distribution facilities so as to provide adequate power supply for the resident sector of the economy. The aim of the project is to generate a geospatial model for electricity consumers and facilities to provide a better understanding towards effective distribution and conservation of electricity. This involves locating and mapping all the facilities involved in distributing energy to the end-users. This modeling involves the collection of both the geometric and attributes data of all the entities identified including that of the consumers. The GIS technology adopted involves the use of computer based wares. A Hand-Held GPS was used in acquiring positional data. These data were formally integrated into computer based software for several analyses. The database generated contained information on the facilities and residential consumers. Series of spatial query operation was carried out to provide answer questions that lead to effective management and monitoring of the distribution facilities. Further analyses such as determining the trend/pattern of the rate in consumption of energy by the households within the study area were carried out. Areas of short-comings were identified and proposed locations/sites were generated in the service areas that needed new facilities. The end products are maps, tables and project report. It was however ascertained from the results that GIS is a competent and effective tool for managing/monitoring electricity distribution network. It also provides a better understanding towards effective distribution and conservation of electricity. In this context, the wrapping up shows that GIS makes map revision and digital mapping easier and some useful recommendations were proffered.

2014-02-12T00:00:00Z