ABSTRACT One of the research challenges in cellular networks is the design of an efficient model that can reduce callblocking probability and improve the quality of service (QoS) provided to mobile users. One most important parameter for assessing the quality of service (QoS) in a network is the probability of dropped calls, which has so far not been deeply studied within the context of established cellular networks. Call/packet dropping refers to the event described as the termination of cal...
ABSTRACT Effective management of large amount and different types of data encountered in daily operations is a major challenge facing academic institutions. Traditional paper based operation is not only costly, but also ineffective. Based on the requirements of the Student Records Office, a student information management system (SIMS) is designed and implemented for Digital Bridge Institute (DBI) in this work. The system is developed to provide DBI with a means to effectively manage its infor...
ABSTRACT With the rise of internet and the explosion of data sources, more and more companies are facing new challenges are facing new challenges that were previously very rare. Those problems concern the storage and the usability of set of data so big and often growing so fast that the usual tools were no more adapted. Moreover the multiplication of data sources and types lead to the problem of storing data that should be considered as unstructured in fixed and structured data models provide...
ABSTRACT For accurate and high rate of lung cancer detection using image processing, an effective preprocessing technique is required. A quality preprocessing technique is necessary to ensure effective removal of noise that interferes with the features of the image and hence improves lung cancer detection rate and accuracy. In this research, an Improved Gaussian Filter (IGF) technique was developed for effective lung image preprocessing. For image segmentation, Otsu thresholding method was us...
ABSTRACT The study used passive compensators and FACTS controllers to achieve power system compensation by obtaining load flow of the Northern Nigerian 330kV transmission grid; determining the voltage magnitudes at the various buses; identifying the voltage violations and applying the passive compensators and FACTS controllers at the worst case scenarios of the voltage violations. The work compared the effects of the compensators on the Northern Nigerian 330kV transmission grid. The load flow...
ABSTRACT This work addressed the problem of forecasting active and reactive power at a substation transformer in a distribution system. Accurate power forecast is of great importance in power distribution planning, reactive power support control and intelligent power management. Due to the complexity of the power system, an intelligent and adaptive forecast algorithm based on the Adaptive Neuro-fuzzy Inference System (ANFIS) was modeled for the power forecast. For the proposed ANFIS forecast ...
ABSTRACT This work presents the influence of rotor Caged winding on the performance of a Transfer Field (TF) machine. The transfer field (TF) machine comprises two identical machines that are integrally wound and mechanically coupled together but with their pole axes 90 electrical degrees out of phase. This project investigates the influence of rotor caged winding on the performance of a transfer field machine using the analysis of the caged and cage-less rotor winding configurations. From th...
ABSTRACT The need to increase the number of channels in a limited radio spectrum while covering a large area in a mobile cellular network has lead to the use of various cell design techniques. With an increased number of channels, handover calls can be dropped while moving from one cell to another in the search of a better signal or as a result of user mobility. New calls are also blocked when the traffic channels are fully occupied. However, new calls should be treated fairly and not to be e...
ABSTRACT In this thesis, a current source inverter fed squirrel cage induction motor drive at constant air gap flux is presented. The drive scheme is conceived to take advantage of the short circuit withstand capability of the current source inverter and the ruggedness (even under harsh conditions) of the squirrel cage induction motor. The variable inverter input dc link current is derivable from either a controlled ac to dc converter or a controlled dc to dc converter. The constant motor air...
ABSTRACT This study sought to understand the role of the Internet in information provision, within the context of other sources of information and everyday information needs. The study also presents findings about the current ways in which people who are blind and visually impaired find information for their everyday lives; the role of the Internet in this process; barriers to using computers and the assistive technologies. A system was designed and created using Visual Basic studio15 to sho...
ABSTRACT In this thesis, a novel approach for the protection of transmission lines which utilizes only coefficient energy for both detection and classification is proposed. The fault current signals generated by workspace on MATLAB simulation model have been analyzed using Daubechie-4 (d4) mother wavelet at 7th level decomposition with the help of Wavelet Toolbox embedded in MATLAB. A case study of 132kV, 160km transmission line has been used to test the novel approach. The value of the coeff...
ABSTRACT 7 Wireless Communication is one of the most active areas of technological development of our time. It covers a very wide array of applications that lead to an ever growing demand on the limited radio resources. Consequently, the need for efficient management of the limited radio resources has become imperatively a global issue. The complexity of the cellular system and the propagation channel resulted in the interference issues that degrade the system performance. Transmit power othe...
ABSTRACT The study was conducted of the Improvement on concurrency control in a distributed database. The objectives of the study are to ensure consistent and correct transaction, efficient data collection and management and recoverability of data in a distributed database. The Mysql relational database was employed in collecting data for concurrency control protocols. The Unified Modeling Language (UML) was used in creating the use case, sequence diagram, class diagram and contract for the s...
ABSTRACT The DC motor speed control system using mobile phone is a device used for controlling the speed of a DC motor. It is powered electrically to vary the speed of a DC motor. This project makes use of dial tone multi frequency (DTMF) decoder after being powered to pick the key pad tones from the GSM phone, encode the tone in binary code to the programmed microcontroller which decodes the binary code and executes the speed control of the DC motor. The speed of the motor depends on the num...
ABSTRACT Security is one thing human should not joke with, especially in today’s world where crime is at a higher rate. One of the ways of providing security is the introduction of security doors in houses, companies, offices and warehouses. Security doors may prevent or control entry or exit, or they may be merely decorative. Larger doors can be used for a whole building, such as a castle or fortified town, or the actual doors that block entry through the gatehouse. Today many doors are ...