Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 353 for “"QA Mathematics"”.
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Simulation of steady mixed convection in a lid-driven cavity filled with newtonian fluid by finite volume method
The steady mixed convection flow in a lid-driven cavity was simulated. The cavity was filled with a Newtonian fluid, both vertical walls are adiabatic, while the horizontal walls were either fixed cold and uniformly/oscillatory heated. Firstly, the effect of internal heat generation or absorption …
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Reassembly and clustering bifragmented intertwined jpeg images using genetic algorithm and extreme learning machine
File carving tools are essential element of digital forensic investigation for recovering evidence data from computer disk drives. Today, JPEG image files are popular file formats that have less structured contents which make its carving possible in the absence of any file system metadata. However, …
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Efficient schemes on solving fractional integro-differential equations
Fractional integro-differential equation (FIDE) emerges in various modelling of physical phenomena. In most cases, finding the exact analytical solution for FIDE is difficult or not possible. Hence, the methods producing highly accurate numerical solution in efficient ways are often sought after. …
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Developing risk management framework for wellhead and christmas tree equipment
Poor design may cause product failure, can be affected the manufacturing processes such as delay in delivery time, increased cost, poor quality, lose time, and risk for lost time injury (LTI). To remain competitive in global marketplace the manufacturing wellhead and christmas tree equipment …
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Malaysia household incomes classification prediction with k-means clustering and fuzzy inference system
The economy level of the citizen has become a main concern for Malaysia as a developing country to improve the living status. On this point of view, the household income data would be a very useful information to measure the economic status of the population in Malaysia. This study aims to build a …
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Unsteady newtonian and non-newtonian fluid flows in the circular tube in the presence of magnetic field using caputo-fabrizio derivative
This thesis investigates analytically the magnetohydrodynamics (MHD) transport of Newtonian and non-Newtonian fluids flows inside a circular channel. The flow was subjected to an external electric field for the Newtonian model and a uniform transverse magnetic field for all models. Pressure …
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Numerical solution of fractional partial differential equations by spectral methods
Fractional partial differential equations (FPDEs) have become essential tool for the modeling of physical models by using spectral methods. In the last few decades, spectral methods have been developed for the solution of time and space dimensional FPDEs. There are different types of spectral …
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Automated human age at death estimation system from long bones histology
Human age estimation at death from bone histology is a frequent and important requirement in forensic anthropology. Usually human age at death is estimated manually from bone histology or morphology. Manual methods of age estimation from bone histology involve three main phases that includes, …
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Key schedule algorithm based on coordinate geometry of a three-dimensional hybrid cube
Cryptographic algorithms play an important role in information security where it ensures the security of data across the network or storage. A key schedule algorithm is the mechanism that generates and schedules all session-keys for the encryption process. The 2-dimensional hybrid cube is generated …
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A framework approach to initialisation dependent clustering methodologies
Clustering algorithms are commonly used for exploratory data analysis and data mining and used correctly are powerful tools for gaining insights into the underlying structure of data. It is known however that some of these algorithms are dependent upon the parameters with which they start, giving …
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Generalized Markov branching models
In this thesis, we first considered a modified Markov branching process incorporating both state-independent immigration and resurrection. After establishing the criteria for regularity and uniqueness, explicit expressions for the extinction probability and mean extinction time are presented. The …
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JUSTGrid: a pure Java HPCC grid architecture for multi-physics solvers using complex geometries
After the Earth Simulator, built by NEC at the Japan Marine Science and Technology Centre (JAMSTEC) on an area of 3,250 m2 (50mx65m), began it's work in March 2002 with the outstanding performance of 35,860 Gflops (40 TFIops peak) [TRIOO], numerous scientists opted in favour of such a …
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Mathematical modelling of gas flow networks in pellet induratlon systems
The objective of this research is to develop a simulation software tool, GASFLO, which should evaluate pressure, flow and temperature distributions of process gas in pellet induration system networks. Pellet induration systems are complex industrial systems composed of heterogenous components. The …
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The development of an expert systems approach to the statistical analysis of experimental data
This thesis is concerned with the application of expert systems techniques in the field of statistics. An expert statistician in industry has a twofold role; undertaking the design and analysis of data from complex experiments and providing supervision and help for research workers who analyse data …
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Simple strategies for variance uncertainty in meta-analysis
Reliability of the measure of precision of the estimate is crucial; a correct value of the standard error of the point estimate entails that the resulting significance of the analysis is correctly stated and that confidence intervals have correct coverage probabilities. Stating an incorrect …
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Finiteness conditions in group cohomology
In this thesis we investigate groups whose nth cohomology functors commute with filtered colimits for all sufficiently large n. In Chapter 1 we introduce some basic definitions and important background material. We make the definition that a group G has cohomology almost everywhere finitary if and …
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Longitudinal analysis of three-dimensional facial shape data
Shape data encompass all the information that is left to describe a shape following removal of location, rotation and scale effects. Much work has been done in the analysis of two-dimensional shapes depicted by anatomical landmarks placed at points of importance. Less has been carried out in the …
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Geometric structures on the target space of Hamiltonian evolution equations
This thesis is concerned with the relationship between integrable Hamiltonian partial differential equations and geometric structures on the manifold in which the dependent variables take their values. Chapters 1 and 2 are introductory chapters, and as such contain no original material. Chapter 1 …
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Geometric methods in the study of Pride groups and relative presentations
… and geometric methods pervade this area of mathematics and it is the latter which forms the main theme of this thesis. In particular, we use diagrams and pictures over presentations to study problems in the domain of finitely presented groups. Our thesis is split into two distinct halves, …
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Rings and modules with Krull dimension
This thesis concerns the interplay between the structures of modules and those of their overlying rings; investigating finite annihilation, prime submodules, boundedness and the relationships between various forms of Krull dimension.
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