ABSTRACT Mobile video streaming has grown tremendously in recent years due to technological advancement of both network and end-devices. Unlike the voice services which run on the background traffic mode, the network impairments on video streaming traffic affect users’ perceived quality directly which results into high rate of churn. For that reason, measuring users’ quality of experience (QoE) has become the major challenge to network operators and service providers. This study therefor...
ABSTRACT This project report is an excerpt of the design of a Micro-controller based Access Control Lock system implemented to assist the university with the aid of security personnel in the prompt detection of students who have not completed necessary fees payment and to checkmate the problem of the ever increasing rate of examination impersonation perpetuated by students. The Micro-controller based Access Control Lock system is an automatic software-based system having two major par...
ABSTRACT The study was aimed at developing mathematical models on the hydraulic performance of Sandbags as Checkdam for erosion control. Pilot studies were carried out at two sites. Site ‘A’ was a natural gully at a location in Ezinihitte-Mbaise, Imo State while site ‘B’ was an artificial channel excavated on the slope of Otamiri River at Federal University of Technology, Owerri. Artificial runoff was simulated into site ‘B’ by pumping water from Otamiri River. Sandbags of ...
Abstract —Radiation on BPLC caused by presence of high frequency communicating signals is discussed in this paper. The paper presents the derived mathematical model which expresses electric field radiation behavior of BPLC system. The model was developed using the combined numerical method of moment (MOM) and transmission line transient (TLT) method utilizing Maxwell integral equation to predict radiation over the line. The mathematical model simulation results for electric field radiation ...
ABSTRACT Remediation of hydrocarbon polluted soil applying all existing techniques can be slow, expensive and requires close monitoring. Bioremediation and phytoremediation augmented bioremediation have been used to treat petroleum contaminated soil and even the difficult poly aromatic hydrocarbon polluted soil which takes longer time. What has not been studied was the effect of heavy metals present in petroleum which slows down the substrate degradation by microorganisms. After the prima...
ABSTRACT The basic idea deals with detecting the voltage collapse ahead of time to provide the operators a lead time for remedial actions and for possible prevention of blackouts. To detect cases of voltage collapse, pattern recognition in conjunction with power system simulator for engineering (PSSE) program was created and then deployed in Nigeria 330KV integrated power system to develop Regularized Least Squares Classification (RLSC) as well as Classification and Regression Trees (...
ABSTRACT This work investigated the structural characteristics of lime cement concrete using 30 selected mix ratios. The properties studied include, compressive strength, flexural strength, splitting tensile strength, shear strength, poisson ratio, modulus of elasticity, and modulus of rigidity. A total of 360 concrete cube specimen, 360 concrete prototype beam specimen, and 360 concrete cylinder specimen were cast and cured in open water tanks. 3 specimen were cast for each mix proportio...
ABSTRACT Isolated or Stand-alone power systems with the use of renewable energy sources have become cost-effective and a convenient option for areas where grid connection is neither available nor feasible. A hybrid combination of Renewable Energy Technologies (RETs) is considered to be the best suited alternative to an expensive grid extension for remote areas around the world. This research focuses on creating a model for electricity generation from a mix of renewable resources (hydro, sol...
Abstract Energy access plays a crucial role in enhancing the social-economic development among the household members in any nation. Notwithstanding the role of energy access in improving the livelihood of people, provision of energy access has revealed to be a major problem in rural areas of Tanzania. The increased in problem of energy access in rural areas of Tanzania is due to the absence of a unified set of indicators for measuring its energy access in order to improve the livelihood and s...
Abstract Detailed characterization of relevant cell components modelling and model validation of the electrical power utilization and productivity estimation of a locally fabricated
ABSTRACT Ductile iron (DI) thin section profiles (≤ 3mm) known as Thin Wall Ductile Iron (TWDI) offer significant potentials in automotive applications because of their high strength with good ductility, wear resistance, castability, machinability and good fatigue properties. “Globally” as-cast TWDIs in many foundries suffer macrostructural and microsructural defects such as solidification shrinkages, coldshuts, misrun, incomplete filling, carbide precipitation, poor graphite morpholog...
This thesis proposes a Restricted Radix-7 Symmetrical Quaternary Signed Digit Number system (RR7SQSDNS) both as an alternative processing logic threshold system and as a signed digit algebraic structure. The thesis also presents the arithmetic operations on elliptic curves defined over this special type of finite field and develops Restricted Radix-7 Symmetrical Quaternary Signed Digit (RR7SQSD) modular exponentiation scheme that uses a multiply-by-7 addition/subtraction chain to compute the ...
ABSTRACT The geometric design of highways requires a large number of iterations and repetitive tasks of analysis and drafting in order to prepare plan, profile and cost estimate.
ABSTRACT The existing Ongwediva Waste Stabilization Ponds have had several problems in their operations over the past years. Thus, the treatment performance of the waste stabilization ponds was assessed in terms of the reduction efficiency of some physical, chemical and biological pollutants of importance. Data were collected daily from May to June 2017 and analyzed for both raw and treated wastewater. Results of these investigation showed that the average effluent concentrations of BOD, DO, ...
ABSTRACT This paper presents the operation of centrifugal pumps as turbines for micro hydropower application. Block diagrams are used to present components required from intake chamber to hydropower plant and their electrical energy mechanism for micro hydropower system. A comparison of operational parameters of pump as turbine and conventional turbines is discussed. Also, the paper discusses three types of methods for selecting the centrifugal pump as turbine based on the head, flow rate, r...