ENGINEERING TOPICS

ABSTRACT

The problems of low mechanical properties of composites reinforced with fibres of natural origin have been a source of concern for researchers. Also, the insufficient utilization of bagasse fibres due to its moderate strength has further reduced its potentialities in composite production hence the need to hybridize with other fibres. In this work, the effects of hybridization on the physical and mechanical properties of bagasse/sisal/coir fibre-reinforced epoxy composites h...

ABSTRACT

This thesis presents the development of a Three Degree of Freedom (3DoF) based outlet fluid temperature controller for Shell and Tube Heat Exchanger (STHX). Shell and Tube Heat Exchangers are classes of heat exchangers being used in industries for heat transfer between fluids. Tracking a setpoint by the STHX is usually a challenging problem, especially when subjected to noise and disturbance. Addressing this challenge, an existing STHX experimental data was employed to deve...

Excerpt from the Study

The complexity of emitters in drip systems, makes it difficult to maintain precision during its production, as a result of changes in temperature, mould damage and nonuniform mixing of raw materials. These are some of the factors affecting emitter homogeneity. Similarly, field evaluation of the hydraulic characteristics of the system under local conditions of the Guinea Savannah ecological zone has not been fully explored (Oyebode et al., 2011...

ABSTRACT

Energy conservation in wireless sensor networks (WSNs) is a key area of research aimed at addressing the challenge of efficient energy utilization. This is due to the fact that the Sensor Nodes (SNs) have limited energy. The limited energy has to be utilized efficiently in order to provide longer network lifetime for the wireless sensor network (WSN). To reduce energy consumption in WSNs, an improved multi-hop routing protocol (mEEMRP) in WSNs based on cluster head (CH) loa...

ABSTRACT

This research work is aimed at the development of an optimal extracted feature classification scheme in a voice recognition system using dynamic cuckoo search algorithm. This minimized error mismatch in the recognition process and increased accuracy of recognition. Standard voice dataset was obtained from English Language Speech Database for Speaker Recognition (ELSDSR) of the Technical University of Denmark (DTU), processed and key features of these voice data were extract...

ABSTRACT

This research presents the development of a Frangi filter and first-order derivative of Gaussian (FF-FDOG) based power line detection (PLD) algorithm as an improvement to the standard PLD algorithm. Vision-based PLD is important in obstacle avoidance in low-altitude flight and also in the surveillance and maintenance of electrical infrastructure. The need for high and real-time detection rates as well as low false alarm in noisy and cluttered images makes it a challenging t...

ABSTRACT

High signaling load due to location management (LM) scheme in Long Term Evolution (LTE) Networks is a major quality of service issue due to the significant amount of resources consumed by this scheme. This scheme needs to be managed efficiently to guarantee seamless connection to any user on the Network at any time. Increasing trends of connected mobile equipment has further increase the required signaling resources for the Location Management Scheme in LTE. There are diffe...

Excerpt from the Study

This study has presented the development of a brightness enhancement technique for video frame pixel improvement based on pixel intensity analysis. The research also achieved an FOA based compression technique using the light intensity and attractionbehaviour of fireflies in nature. This optimization technique was further modified by nullifying the effect of long distance between any two pixels in an image using the inverse square law relation...

ABSTRACT

Pilot Contamination (PC) has been considered as a majorlimiting factor of Time Division Duplexing (TDD) Massive Multiple-Input Multiple-Output (M-MIMO) systems, as itsaturates the signal to interference plus noise ratio (SINR) saturated. Similarly, several mitigation techniques such as Eigenvalue decomposition, cooperative Bayesian channel estimation, blind equalization technique, time staggering pilot, smart pilot assignment, etc. proposed in literature to address PC issue...

ABSTRACT

Energy efficiency is one of the most important challenges for Wireless Sensor Networks (WSNs). This is due to the fact that sensor nodes have limited energy capacity. Therefore, the energy of sensor nodes has to be efficiently managed to provide longer lifetime for the network. To reduce energy consumption in WSNs, a Modified Energy Efficient Clustering with Splitting and Merging (𝑚𝐸𝐸𝐶𝑆𝑀) for WSNs using Cluster-Head Handover Mechanism was implemented in this research. This...

ABSTRACT

Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier frequency multiplexing scheme used in broadband wireless communication systems and has advantages such as high spectral efficiency, simple channel equalization and flexibility.One of its major challenges is the high Peak-to-Average Power Ratio (PAPR) of the signal which can cause a nonlinear signal distortion and reduction in power efficiency. One of the techniques used to reduce PAPR is the Partial Transm...

Excerpt from the Study

The IAR multicrop thresher was modified and reconstructed at the Department of Agricultural Engineering, Ahmadu Bello University; to increase its threshing performance for Millet and Soybean crops. The performance of the machine was evaluated, mathematical models for predicting its threshing efficiency, threshing loss and output capacity were developed and the machine was optimized for both crops. Based on the result of this study the followin...

STATEMENT OF PROBLEM

Nanocomposite is a class of composites in which the dimensions of the reinforcing particles are in the order of 1-100 nanometers. Because of this nanometer size characteristic, nanocomposites possess superior properties to the conventional composites due to larger interfacial adhesion. In the past, major interest has been in the use of synthetic materials such as aliphatic polyesters, aliphatic-aromatic polyesters, polyvinyl alcohols, polyestera...

ABSTRACT

Timely delivery of construction projects can fasten up drastic development in any country. Construction delay has become endemic in Nigeria, it is imperative to create awareness of the extent to which delays can adversely affect project delivery. This study identifies, by questionnaire evaluates and through empirical method assesses the effects of construction delays. The findings showed that time and cost overruns were frequent effects of delay. Delay had...

Excerpt from the Study

This work was aimed at developing and characterising epoxy/BPLSF reinforced composite by hand lay-up method.At the end of the study, the following conclusions were made.

i. Characterisation of untreated and treated fibre confirmed the etching away of surface and interfibrillar materials by NaOH treatment, and further revealed latex layers on latex treated fibres that served as reactive sites with epoxy matrix.Single fibre strength sh...

Excerpt from the Study

The two-row engine propelled ridge seed planter was developed and evaluated for performance in comparison with an existing single row animal drawn seed planter and the manual planting method. The developed planter has the capacity for planting two seeds per hole in one hectare in 4.55 hours. Seedling emergence under the developed planter was 30,636 per hectare as against the 26,091 per hectare for the animal drawn planter and 28,545 per hectar...

Problem Statement

The successful operation of cognitive radios depends largely on the results of spectrum sensing. Energy detection being the simplest to implement in terms of computational complexity has attracted a great deal of attention from researchers in order to improve on it, as its performance is weak when the SNR is low. Researches had proposed ways of performing energy detection and the use of time-frequency analysis show a great potential. However, the d...

Abstract

Waste Management is pertinent in achieving sustainable Development, which is fuelled by the growing concern for the effect of man’s activities on the environment. The management of Construction processes to reduce, reuse, recycle and effectively dispose of wastes has a serious bearing on the final cost, quality, time and impact of the project delivery. This research studied the impact of building materials management on project delivery in Nigeria. T...

ABSTRACT

There is dearth of information on output level of building operatives in Nigeria, consequently, the output constants currently used for preparation of construction estimates are remnants of British colonial heritage or derived from untested experiences. Therefore this study aims at empirically determining output constants for floor finishes (screeds and tiles) for building project in Abuja. The objectives are to identify the productivity factors related to...

ABSTRACT

This study examined the effects of effluent discharges from various point-loads on a purposively selected receiving river, the self-recovery ability of the river and the treatability of both the discharges and the receiving stream in a heavily industrialized community.

The work involved field survey of industries producing and discharging effluents in the study area (Ado Odo/ Otta industrial zone...

Abstract

The study examined the distributional pattern of mechanic workshops in Ibadan North Local Government Area of Oyo State. Numerous accidents recorded in Ibadan North Local Government area coupled with frequent car breakdowns made the researcher to investigate the subject matter and the following objectives were formulated for the study; to examine the pattern of distribution of automobile mechanic workshops in the study area, to examine the factors that deter...

STATEMENT OF THE PROBLEM

In this country, Nigeria, just like most developing countries in the world, we are faced with the challenges of light disruption. Continuous spending on fuelling and maintenance of our fuel generator, but now lets look at another alternative. Converting a fuelled generator into a fuel less generator and it has a low maintenance cost.

1.3. OBJECTIVE OF THE SEMINAR

The aim of this project is to design and m...

ABSTRACT

When the transportation system of any educational institution is effective, it positively contributes to effective learning; saves cost and generate revenue to the authorities. This is the desire of every institutions of learning although a number of constraints usually make it not attainable. The transportation system presently operated by the school was studied and found to be cumbersome, exploitative and fall short in all standard of a good transportatio...

ABSTRACT

The problem of water Scarcity, water pollution and cost of accessing water for domestic needs have become growing concerns to the ever increasing global population. Waterwaterremediation has long been accepted as a viable option to mitigate water scarcity. This research examines the potentials of an environmentally friendly technique of using local but modified tropical plant materials in remediation of greywater for re-use. Column adsorption experiment was conducted using...

ABSTRACT

Characterization and concentration of Kurungu Iron ore has been undertaken. Bulk samples were collected from the deposit site located in Kurungu village Ajaokuta Local Government Area of Kogi State, Nigeria. The samples were crushed and pulverized and a representative sample obtained by coning and quartering method. Analysis of the representative sample was done using the XRF for composition analysis, XRD and SEM for the mineralogical analysis and the modified Berry and Bru...