Research Papers/Topics in Physical Sciences

Contributions to Operator Theory and Applications

Abstract This thesis consists of two parts. The first part deals with existerice and approximation techniques for finding solutions of operator equations or fixed points of operators belonging to certain classes of mappings. The classes of mappings studied include the K-posztz~~e definzte operators, the suppressive mappings and accretive-type rntippings. In particular, it is proved that for a real Banach space X, the equation Au = f, f E X, where A is a Kpd operator with the same domain as A'...

Waste Disposal and Groundwater Quality in JimetaYola Area, Adamawa State, Nigeria

ABSTRACT. Waste disposal and groundwater quality studies were carried out in the Jimeta- Yola area. The area lies between latitudes 9'1 1'N to 9'20'~ and longitudes 12'23'~ to 12'33'~~ and covers an areal extent of about 305km2. Groundwater quality monitoring was carried out through the collection of water samples from hand-dug wells, boreholes and leachates beneath refuse dumps. These samples were analyzed chemically and bacteriologically using atomic absorption spectrophotometer (AAS), DW20...

Concentration of Cadmuim, Lead and Chromium in Human Whole Blood

Abstract Human whole blood samples obtained from blood banks in different hospitals in Enugu State were analyzed for cadmium, lead and chromium concentrations using atomic absorption spectrophotometric method. The results of the analysis showed that about 72.7% of the samples had cadmium concentrations more than the limit of safe exposure (5ug/l of blood). Also about 18.2% of the samples had the concentrations of lead to be more than the maximum permissible limit in adult human blood which is...

Sediment Loading and Subsidence in the Niger Delta Sedimentary Basin

INTRODUCTION Geological and geophysical investigations reveal that maximum subsidence of the basement and active downwarping of the lithosphere have occurred around the axis of symmetry of the Niger Delta. A great bulk 6f sediments h~ accumulated:in this sedimentary basin stn~~ Tertiary, and during the period of accumula- . tion, vertical tect()nic movementS took place. This is evidenced by the presence of shallow water sediments ia deeper parts. of the basin. It is obvious from the overall t...

Studies of the Drying Performance of Melon and Rubber Seed Oils.

ABSTRACT Oxygen absorption studies of blends of oils of seed s eed melon~(~SD), rubber (RSO) and linseed (LSD) have been L carried out at room temperature in order to optimise the drying performance of MSO and RSO. A manometer was used to measure O2 absorbed. The set-to-touch time ( STTT) of o i l o r o i l blend was measured after 3 hours of O2 absorption and 18 hours of ageing. Addition of LSO to MSO reduced its STTT from 12.25 hours to 4.0 hours at 50/50; this compares favourably with the ...

The Geologic Setting of Lead-Zinc Deposits of Ishiagu, Southeastern Nigerian

Abstract-The Ishiagu lead-zinc deposits of southeastern Nigeria are associated with folded shales of the Asu River Group. The PbZn mineralization is restricted to a series of closely spaced, steeply dipping subparallel fractures which trend NW-SE and typically form en-echelon patterns. Along a second set of fissures, oriented NE-SW and of an earlier generation than the NW-SE system, only the gangue minerals (siderite and quartz) are characteristic. The style of mineralization is exclusively f...

Iterative Approximation of Equilibrium Points of Evolution Equations

Abstract Suppose that E is a real Banach space .which is both uniformly convex and q-uniformly smooth and that T is a Lipschit;: pseudocontractive self-mapping of a closed convex and bounded subset K of E. Suppose F(T) dcnotes the set of fixed points of T and U denot :s the sunny nonexpansive retraction of K onto F(T) and w any point of K, it is proved that the sequence {xn),"Lo generated from an arbitrary xo E K bv (where I denotes the identity operator on E and {a,),"==, and {Pn),"=o are re...

The Growth and Characterization of Thin CDs by Solution Deposition Technique

CONTENTS .- - CERTIFICATION: DEDICATION : ABSTRACT ACKNOWLEDGEMENT CHAPTER ONE: INTRODUCTION : ' 1.1 Motivation behind growth of thin Films 1.2 What are thin films .I "3 Uses of thin films 1.4 Deposition techniques : 1.5 Reasons for the technique used in experimentation 10 - CHAPTER TWO : BASIC SEMICONDUCTOR PHYSICS 12 - 39 2.1 What are SemicondLlcrors 12 2.2 Examples of Semiconductors 14 2 '3 Types of Semiconductors 16 2.4 Semiconductor Statistics 20 2 -41 Probability of occupation of allowe...

O-Acylation of Angular Diazaphenoxazine and Related Carbocyclic Analogue Using Buchwald Catalyst

ABSTRACT Synthesis of twelve O-arylated diazabenzo[a]phenoxazine-5-one and its carbocyclic analogue is reported in 46 - 99 % yields. The intermediates were prepared by anhydrous base catalyzed reaction of 2,3-dichloro-1,4- naphthoquinone with 4,5-diamino-6-hydroxyl-2-mercaptopyrimidine and 2- aminophenol. The O-arylation process occurred smoothly in non-polar solvent, toluene with the inexpensive base, K2PO4 at 110o C. The intermediates were combined with a variety of electron-deficient, elec...

Hydrogeophysical Investigation in Nsukka Area Southeastern, Nigeria

ABSTRACT Resistivity surveys were carried out at seven stations within the university of Nigeria, Nsukka and its environs. The objective was to determine areas suitable for the drilling of boreholes for groudhvater. The results generated from this survey were interpreted in terms of the number of subsurface layers, usurer thickness, depth to uquifer and, probable lithology$orrnations. However, lithologic interpretations were carried out using exist ring borehole data from the area. A BEM Terr...

Semiannual Variation of Dst-Related Disturbance and Association with Solar and Geomagnetic Activity

ABSTRACT A study of the semiannual variation of the Monthly mean Dst-related disturbance in H and Z components of the geomagnetic field has been carried out. Magnetograms from fifteen (15) geomagnetic stations in the high- mid- and low latitudes, and which includes three of the stations used in computing the Dst index have been analyzed. Sixty-one years data (1950-2010) was utilized. The H-component (Hdiff) and Z-component (Zdiff) of the Dst-related disturbance were computed by removing the s...

Subsidence and evolution of Nigeria's continental margin: implications of data from Afowo-1 well

A good understanding (If the structure and mode of evolution of the continental margin of Nigeria is crucial for many reasons. In terms of hydrocarbon accumulation, the area is of high economic importance as demonstrated by the high level of exploration activities that has been maintained in the area especially in the last three decades. The fishing industry would also benefit from a proper understanding of the bathymetry and morphology of the margin. Nigeria's scientific institutions have ye...

Estimation of Sucrose Loss Due to Inversion Process as A Result of Multiple Effect Evaporation

TABLE OF CONTENTSTITLE PAGE.iDECLARATION iiAPPROVAL iiiDEDICATION ivACKNOWLEDGEMENTS vDEFINITION OF TERMS viABSTRACT viiTABLE OF CONTENTS viiiLIST OF TABLES xiTABLE OF FIGURES xiiCHAPTER ONE 11.0 Introduction I1.1 Problem statement 21.2 Aim 21.2.1 Objectives 21.3 Significance of the study 21.4 Scope of study 3CHAPTER TWO 42.0 Introduction 42.1 Process Description 42.1.1 Cane sugar production 42,1.2 Harvesting and transport 52.1.3 Canepreparation 52.1.4 Milling 6vi”2.1.5 Clarification .62.1....

Effect of Flocculent On Scale Formation in Evaporators

ABSTRACT  Scale formation has become a big burden to sugar manufacturing industries, especially in evaporators, this is because of the characteristics of cane juice which is allowed in evaporators. Evaporators are used to evaporate as much water as possible from the juice using exhaust steam from the powerhouse as the heating medium so as to concentrate the juice which is called syrup (that is the juice leaving the evaporator) and the juice entering the evaporator is termed as clear juice. S...

Palm Print Recognition System

ABSTACT Palmprint recognition has been investigated over ten year years. Palmprint is proven to be distinguishable from other features because of number of attributes. These attributes include color, clarity, position, continuity, length and variation in thickness. Lines are represented in a very efficient way and it needs low storage and consistency in detection and these are efficient for shape matching involving large database. But there will always be a problem of missing or broken lines ...


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