DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING

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Assembly language programming using MC68000
(2005-05) Arulogun, O. T.; Fakolujo, O. A.; Omidiora, E. O.; Ajayi, A. O.
Assessment of an access control system using principal component analysis and discrete cosine transform.
(2008-08) Omidiora, E. O.||||Olabiyisi, S. O.; Fakolujo, O. A.; Olabiyisi, S. O.
In this paper, faces were employed as the only control means of right of entrance and usage of information on the super-highway. Principal Component Analysis (PCA) and Discrete Cosine Transform (DCT) algorithms were employed as our basis of comparison. An assessment of both algorithms was considered, it was discovered that PCA proved to be a better algorithm for access control and recognition system because of its very high average percentage of rightly classified faces (90.43%) and its strict attendance to both FAR and FRR (0.1077, 0.0609) than DCT with 64.57% and: 0.24 and 0.02 respectively.
Cadmium chloride thin films: hydration-dehydration
(Elsevier Sequoia, 1987) Green, M.; Fakolujo, O. A.
Chaotic Secure Communication Schemes employing Chua's Circuit
(2010) Kamil, I. A.; Fakolujo, O. A.
In recent years, chaotic secure communication systems have attracted significant interest due to their higher unpredictability over conventional secure communications system and simplicity of implementation. This study presents the modeling of four chaotic modulation techniques. The techniques are Chaotic Masking (CM), Chaos Shift Keying (CSK), Chaos On-Off Keying (COOK), and Differential Choa Shift Keying (DCSK). Simulations were carried out using Simulink in Matlab environmnet to implement these techniques. A qualitative evaluation of the transmitted signal waveforms in all the cases considered showed that DCSK gives the highest level of secuirty followed by CSK while COOK gives the least level of security. The data transmission rate of the other three techniques was however twice that of DCSK.
Chaotic secure communication schemes employing Chua's Circuit
(2010) Kamil, I. A.; Fakolujo, O. A.
In recent years, chaotic secure communication systems have attracted significant interest due to their higher unpredictability over conventional secure communications systems and simplicity of implementation. This study presents the modeling of four chaotic modulation techniques. The techniques are Chaotic Masking (CM), Chaos Shift Keying (CSK), Chaos On-Off Keying (COOK), and Differential Chaos Shift Keying (DCSK). Simulations were carried out using Simulink in Matlab environment to implement these techniques. A qualitative evaluation of the transmitted signal waveforms in all the cases considered showed that DCSK gives the highest level of security followed by CSK while COOK gives the least level of security. The data transmission rate of the other three techniques was however twice that of DCSK.
Data retrieval and use of ICT in research
(2006) Fakolujo, O. A.
Design methodology and heuristic for reconfigurable hybrid macro pipeline multiprocessor
(Duncan Science Company, 2010) Olakanmi, O. O.; Fakolujo, O. A.
"The research developed a reconfigurable hybridized multiprocessor system, Hybridized Macro Pipeline Multiprocessor (HMPM), which combines two multiprocessing techniques –macro pipeline and parallelism. This solves the problems associated with using multiprocessor system to execute sequential applications. In addition, a heuristic is developed for the system, this reconfigures the processors in each cluster according to input load in order to prevent load imbalance. Multiprocessor system has led to increased throughput of system in many applications such as image processing, computer graphic and real time systems. It has also contributed to the increasing use of parallel hardware along-with the associated software, which solves the bottleneck associates with high computation tasks. There are different ways of increasing the throughput in a multiprocessing environment. Parallelism technique; where different processors are allocated different parallel-subtasks at the same time. In macro pipeline, all the available processors must sequentially work on all the subtasks. Several researchers have proposed different form of multiprocessors using any of these multiprocessing techniques. However, these techniques are application dependent. That is some applications are sequential, for these applications, parallelizing their execution will reduce the throughput. Some are parallel in nature, executing these sequentially will also reduce the throughput. This made some of the proposed multiprocessor system application-dependent. This paper proposes a reconfigurable Hybridized Macro Pipeline Multiprocessor (HMPM); a hybrid multiprocessor system that combines sequential and parallel execution techniques in order to increase the multiprocessor throughputs and make it application-independent. HMPM uses homogenous processors as the processing elements. A streaming application is taken and broken into a series of subtasks, which are parallel assigned to different pipelined clusters. The problem of mapping each of the streaming unit into each of pipeline stage is solved with a simple architecture and heuristic that efficiently determine the design space. "
Development of a mosfet-based radio frequency amplifier for improved signal reception
(Blackwell Educational Book, 2010) Falohun, A. S.; Fakolujo, O. A.; Abolade, R. O.
It is highly desireable that the information routed from a source reaches the audience or destination with little or no interference or distortion. In radio wave propagation, at times, the signal received at the destination arrives with some form of noise; which makes the message unintelligible enough for the listener. And at some other times, the signal cannot even be picked up at the recieving end. Hence, a device that will obtain the maximum possible noise is desirable. In this research work, we designed a preamplifier using a Metal Oxide Semiconductor Feild Effect Transistor (MOSFET) to filter noise and to produce clearer pictures and better sound quality with increased directivity or gain. The MOSFET-based preamplifier was analyzed in performance and compared with the usaul Bipolar Junction Transistor (BJT) type. The result in analytical form showed a gain of 25.1dB in the MOSEFT-type and a 7.93dB in BJT. The designs were simulated with a simulator package, Electronic workbench 5.0. The result obtained agrees with the analytical results. However, for better monitoring of antenna behavior, particularly over a band of frequencies, a network analyzer is suggested. And for a more accurate and stable preamplifier circuit, a microprocessor can be considered for future design.
Development of mobile intelligent poultry feed dispensing system
(2010) Arulogun, O. T.; Fakolujo, O. A.; Olaniyi, O. M.; Fenwa, D. O.; Olaniyan, A. B.
"Feeding in poultry farming in most developing countries, like Nigeria, is still manually carried out as high level of human involvement is required. This places an exorbitant cost of production on the farmer and reduces the expected return from investment. Besides, human intervention to poultry feeding is limited to fatigue, negligence, unfavourable weather conditions, and improper administration of feeds. In this paper, we present a microcontroller based poultry feed dispensing system.The mobile intelligent system is capable of moving forward, turn left, right and has the ability to detect and avoid obstruction. The developed model shows how mechanical transmission systems in machine can imbibe human intelligence of poultry attendants with corresponding increases in cost-benefits and high profits yield from a reduced labour force in poultry farming. "
Diagnosis of gasoline-fuelled engine exhaust fume related faults using electronic nose
(2010) Arulogun, O. T; Waheed, M. A.; Fakolujo, O. A.; Omidora, E. O.; Olaniyi, O. M. O. M.
Fault diagnosis, isolation and restoration from failure are crucial for maintenance and reliability of equipment. In this paper, a condition monitoring approach that uses the sense of smell was investigated to diagnose ignition and loss of compression faults in gasoline-fuelled engine. An electronic nose based condition monitoring system was used to obtain smell print of the exhaust fumes of an automobile gasoline engine in different normal and faulty operating conditions. The data were analyzed with fuzzy c-means, hybrid principal component analysis and artificial neural network. Fuzzy C- means clustering was used to ascertain the extent to which the smell prints can characterize the selected engine faulty and normal conditions. Silhouette diagrams and silhouette width figures were used to validate the clusters. The faults considered were all correctly classified by hybrid principal component analysis and artificial neural network algorithm with 100% accuracy.
Digital watermarking of still images with colour digital watermark
(2010) Zubair, A. R.; Fakolujo, O. A.; Rajan, P. K.
Digital watermarking is a popular tool for copyright protection, content authentication, detection of illegal duplication and alteration, feature tagging and secret communication. In this paper, a method of embedding a colour image as digital watermark into a host image is proposed. The watemark is first converted from the Red-Green-Blue (RGB) colour space to an index image. The index image is decomposed into a series of binary digital images for implementation as multiple watermarking. Experimental results shows that the proposed method is robust to resonable image processing operations and the lossy compression techniques such as the Joint Photographic Expert Group (JPEG) compression. Furthermore, application of democratic approach in signal sampling is found to produce better signal to noise ratio compared with uniform quantizaton approach.
Electron beam decomposition of CdCl2
(American Institute of Physics., 1984) Green, M.; Aidinis, C. J.; Fakolujo, O. A.
The e-beam stimulated reaction, CdCl2 (s)----Cd(s) + 2Cl(g), has been studied in cadmium chloride thin films between 303 and 483K using 2-keV electrons. The dose required to make 90-mm-deep holes at 483K is 3 X10-3 Ccm-2. Extrapolated dosing levels of ~6X10-5 C cm-2 are expected. The use of CdCl2 as a positive-type electron resist in a new scheme is proposed. A working model, useful for considering the e-beam stimilated decomposition energetics and mechanism, is briefly discussed.
A framework for electronic nose based condition monitoring and diagnosis of automobile engine faults.
(Nigeria Computer Society, 2009) Arulogun, O. T; Fakolujo, O. A.; Waheed, M. A.; Omidiora, E. O.; Olaniyi, O. M.
A framework for condition monitoring approach that uses the sense of smell was investigated to diagnose the faults of plug-not-firing, loss of compression and carburettor faults from the exhaust fumes of gasoline fuelled automobile engine. An electronic nose based condition monitoring hardware and software was developed using the framework to obtain smell prints that correspond to normal operating conditions and various induced abnormal operating conditions. Fuzzy C-means and K means clustering were used as exploratory data visualization tools to ascertain if the obtained smell prints from the developed system could characterize the faults considered. The results of exploratory cluster analysis showed that the obtained smell print could typify the faults considered.
Fundamentals of Electromechanical Systems
(2010-02) Arulogun, O. T.; Fakolujo, O. A.; Omidiora, E. O.; Okediran, O. O.
A generalized model for quantitative evaluation of reliability indices, of the national grid system
(2010) Ajenikoko, G. A.; Fakolujo, O. A.; Raji, T. I.
Reliability indices are considered to be reasonable and logic ways to judge the performance of an electric power system. Reliability indices which are proposed by the IEEE are used to evaluate the performance of selected distribution systems on the national grid. Ten years of outage data (1998 - 2007) from seven selected distribution systems on the national grid were used as case studies in this research work. A generalized model is developed for a quantitative evaluation of relative indices of the national grid system. The development of the model stated with identification of the system reliability indices and estimating the contributions of system indices to the failure rate of the selected distribution system on the national grid. The computed system reliability indices are used as input parameters for the generalized model. Relative CAIDI index is computed by simulation using MATLAB 7.7 which automatically generates the graph of the relative CAIDl against names of feeders. The percentage average relative CAIDls for Ibadan, Port-Harcourt and Benin distribution systems are 71.86%, 52.79% and 75.79% respectively, thus, average reliability levels. Ilorin, Ikeja, Kaduna and Kano distribution systems have percentage average relative CAIDls of 11.95%, 39.76%, 40.17% and 41.08% respectively with poor reliability levels. With the aid of curve fitting (cf) tools, two distinct model equations were developed from which a generalized model is formulated for a quantitative evaluation of reliability indices of the national grid. The generalized model is a polynomial function whose order depends majorly on the level of industrialization of the distribution systems and the number of distribution feeders.
Introduction to measurement and instrumentation
(2005-05) Arulogun, O. T.; Fakolujo, O. A.; Omidiora, E. O.; Ajayi, A. O.
Lorenz-based chaotic secure communication schemes
(Research Insight Publishing Corporation, 2012) Kamil, I. A.; Fakolujo, O. A.
Secure communication systems employing chaos have recently attracted significant interest. This is partly due to their high unpredictability and simplicity of implementation over conventional secure communications systems. This study presents the implementation of four chaotic modulation techniques employing Lorenz system as chaos generator. The techniques are Chaotic Masking (CM), Chaos Shift Keying (CSK), Chaos On-Off Keying (COOK), and Differential Chaos Shift Keying (DCSK). Simulations were carried out using Simulink in Matlab environment to implement these techniques. A qualitative evaluation of the transmitted signal waveforms in all the cases considered showed that DCSK gives the highest level of security followed by CSK while COOK gives the least level of security.
A modified linear contribution factor model for improvement of relability indices of electrical distribution systems.
(2009) Ajenikoko, G. A.; Fakolujo, O. A.; Raji, T. I.
In Nigeria, satisfactory degree of reliability has not been attained in our power systems in recent times. The average duration of interruptions that customers experience is quite high and the degree varies from place to place. This is evident all around the nation, most especially in urban commercial cities. Previous researchers have focused on assessment of power system reliability indices using different models. In this work, a computationally efficient 'modified linear contribution factor model (LCFM) is developed. The model can be used for appreciable improvement of all the major system reliability indices of practical distribution systems unlike the conventional LCF model which can only improve some of the system reliability indices of practical distribution systems. Data collection and data analysis were carried out to develop the LCF model used on the three selected distribution systems on the Nigerian National Grid. The results 'of this work indicates that part of the reliability indices computed for the distribution systems SAIFI is more sensitive to the LCF model than SAIDI and CAIDI but that the sensitivity is low for SAIDI index compared to CAIDI. This is due to the quantization of the annual number of customer interruptions caused by the type and placement of protective devices on the distribution systems of the National Grid. With the use of the modified LCF model, the average percentage improvement in the system reliability indices become 97.72%. 98.55% and 98.63% for Ibadan, Ilorin and Ikeja distribution systems respectively as against an average percentage improvement of 36.08%. 11.36% and 24.36% in the system reliability indices for Ibadan, Ilorin and Ikeja distribution systems respectively with the use of conventional LCF model. The result of this research work confirms the efficiency of the modified LCF model.
Nature-inspired optimisation methods: the ant algorithm.
(Duncan Science Company, 2008) Bello, O. A.; Ayeni, R. O.; Fakolujo, O. A.
Nature has inspired many optimization techniques/ methods. This paper is directed to introduce some of these methods to the reader and emphasis was laid on the ant algorithm by discussing its properties and what it entails. Also some of the problems that ant algorism has been used to solve was listed while two of them were discussed in full,the TSP which the writer worked on and network routing
Optimised fisher discriminant analysis for recongnition of faces having black features.
(Medwell Journals, 2008) Omidiora, E. O.; Fakolujo, O. A.; Ayeni, R. O.; Adeyanju, I. A.
A face recognition system is one of the most desirable biometric identification such as computerized access control, document control and database retrieval. Although, several researches have been done on face recognition, most (if not all) have made use of non-black faces or very few numbers of black faces in their experiments. This study presents results of experiments based on black African faces (with and without tribal marks) using the optimized Fisher Discriminant Analysis. In the experiment, different sizes of gray scale images were used for recognition performance accuracy of between 88 and 99% were obtained. Also, taking into consideration was the rate of identifying an image using the same number of images to test the face recognition system. While, a completely robust real-time face recognition system is still under heavy investigation and development, the implemented system serves as an extendable foundation for future research.