ABSTRACT This seminar focuses on a low cost DC motor speed control system using a microcontroller logic pulse-width modulation [pwm] controller to control brushless DC Motor. In a digital controller of brushless DC Motor, the control accuracy is of a high level, and it has a fast response time. Here a microcontroller of 8-bit type (80CL580) will be used as the systems core controller in other to acquire an accurate logic control algorithm. The DC motor speed control has found vast application...
ABSTRACT Construction industry has complexity in it nature because it contains large number of parties such as clients, consultants and contractors. The factors that influence construction management practice differ from country to country, due to prevailing conditions. The objective of this project is to identify factors that influence construction management practice in Nigeria construction industry and elicit perceptions/ranking of the severity using relative importance index of the variou...
ABSTRACT Safety on Nigeria roads has become a thing of concern in recent times. This is as a result of numerous carnages that have characterized with Nigeria roads. This loss of lives and properties have been attributed to many factors including poor road design and defective construction practice. A road that is poorly designed, is in no doubt a threat to the safety of the road users. In this paper, therefore the way in which highway design and construction practice impacts on the safety of ...
Abstract Reliable electricity supply is essential for development. As a result, demand for electricity has continued to increase globally, occasioned by the fact that electricity is highly portable and can be transformed from one form to another to meet needs. In Nigeria and most developing countries, electricity supply from the public utility is not only insufficient but highly erratic. The effect of this is adverse on critical and sensitive infrastructure that depend on uninterrupted power ...
ABSTRACT A web-based information management system for national health insurance scheme(NHIS) will assist the body to have an online registration of people, health maintence organizations (HMOs), accredited heath care providers, etc. Looking at the Nigerian population, access to health insurance is denied to a certain category of people as a result of not being a government worker or not privileged to be duly informed on the operation of the scheme and how to enroll Knowing that Health insura...
ABSTRACT The traditional methods of analysis of frames are based on first-Order Solution which has many simplifying assumptions, the chief of which includes negligence of shear and axial deformations. In its formulation, the existing second order solution neglected the contribution of shear deformation as well as the contribution of axial force in the curvature of the element. In the attempt to estimate the effect of shear deformation, A, Chugh super-imposed to the conventionals (traditional)...
ABSTRACT ( . 1, Routing of solid waste collection vehicles in Nigeria poses a challenging task I because ol' attitudinal and liapliazard infi-a structural problems to contend with. 1, New decision procedures for solid waste collection problem are introduced in this study. 'The problem objective is to minimise the overall cost, which is essentially I based on tlie distance travelled by vehicle. The study proposes heuristic methods to generate a feasible solution to an extended Capacitated Chin...
Certification ........................................................................................ , . Dedication ............................................................................................... Acknowledgement ........................... ... ............................................. List of Tables ........................................................................................ List of Figures ........................................................................
ABSTRACT Generally, for existing Insulation co-ordination studies the power system has been modeled either by deterministic mathematical techniques or by statistical methods. The shortcoming of the existing conventional mathematical technique of Insulation co-ordination analysis is that it assumes that the power system dynamics is linear. This makes analysis of over voltage response of the system under transients less optimal for determining over voltage withstand of system elements. Thus, th...
ABSTRACT Relevant literature for the modeling and analysis of failure of GRP composites were reviewed. Samples of GRP composites were prepared by hand-lay up. Composites samples were subjected to compressive tests using a tensometer. Mechanical characteristics, such as modulus of elasticity; compressive strength, proportionality limit, elastic limit and critical strain of composites were evaluated from compression tests results. It was found that the compressive strength of all the samples is...
ABSTRACT Maximum power point tracking of a polycrystalline Photovoltaic (PV) cell using an Optimized Adaptive Differential Conductance (OADC) technique was proposed in this work. This technique enhances the optimum power transfer from PV panel to the load by reducing the tracking latency and increasing convergence efficiency and speed unlike the conventional Incremental conductance. In this research work, current at maximum power point and voltage at maximum power point can be calculated with...
Needle-free injection (NFI) is a novel transdermal either intramuscularly or subcutaneously drug delivery system, where innovative ways to introduce a variety of medicines like as antibiotics, iron, or vaccines comfortably, accurately, easily and rapidly without, piercing the skin compared to traditional needle. While hypodermic needle is inject substances into body by intradermal, intramuscular, subcutaneous, intravenous, etc or extract fluids from the body body, for example taking blood fro...
Africa’s healthcare system is challenged by inadequate medical equipment, stemming from the fact that it does not manufacture its own medical devices but depends mostly on used medical equipment donations, many of which do not function and require extensive repairs. The World Health Organization estimates that 50 to 80 percent of medical equipment in developing countries are not working, therefore creating a barrier in the health system delivery of health services. Mechanical ventilators ...
ABSTRACT The International Telecommunication Union (ITU) has directed some countries of the world to migrate from analogue to digital broadcasting service before June 17, 2015. This transition has many challenges which have been approached in many ad hoc ways by several countries. This study is aimed at formulating a model that could measure the degree of success of the digital transition programme at any stage of the process. It uses control engineering approach, particularly the state varia...
ABSTRACT The broadcasting stations in Nigeria often encounter sudden failures, which results in loss of signal that causes the station to experience down-time. Causes of the failures could be traced to the issues that range from erratic power supply to degradation in the studio equipment. Each failure and its consequent down-time influences the reliability of the station. In our environment (Nigeria) reliability does not only depend on the established parameters, instead it includes parameter...