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As deel van die weermodifikasie-eksperiment in Bethlehem, Suid-Afiika, is 'n reenmeternetwerk
geinstalleer, en word die neerslagwaardes R; wat by 43 reenmeterstasies waargeneem is, vergelyk
met die waargenome radar ...
Marshy soil and sediment samples were collected during dry and rainy seasons within Warri, and Agbarho, 20km away as control. Levels of 16 USEPA priority Polycyclic Aromatic Hydrocarbons PAHs were determined using GC-FID. ...
Almost contact metric submersions constitute a class of Riemannian submersions whose
total space is an almost contact metric manifold. Regarding the base space, two types
are studied. Submersions of type I are those whose ...
Under current investigation is the re-implementation of the Distorted-Wave Impulse Approximation (DWIA),
originally formulated in FORTRAN by N.S. Chant and P.G. Roos, with the intention of developing it in a
portable ...
The aim of the study was to compare the effects of the use of interactive computer simulations for cognitive load change of grade 11 learners in the acquisition of knowledge and a science process skill in geometrical optics. ...
103Pd is an important therapeutic radionuclide and has recently found great interest due to its higher radiobiologic effect. 109Cd decays by electron capture and is generally used as calibration sources in industrial and ...
Using a Lie symmetry group generator and a generalized form of Manale's formula
for solving second order ordinary di erential equations, we determine new symmetries
for the one and two dimensional heat equations, leading ...
The thesis presents a new method of Symmetry Analysis of the Black-Scholes Merton
Finance Model through modi ed Local one-parameter transformations. We determine
the symmetries of both the one-dimensional and two-dimensional ...
Thermal control in spacecraft will be increasingly important as the spacecraft grows smaller and more compact. Such spacecraft with low thermal mass will have to be designed to retain or reject heat more efficiently. The ...
This study empirically compares the Classical Test Theory (CTT) and the Partial Credit Model
(PCM) of Rasch focusing on the invariance of item parameters. The invariance concept which is
the consequence of the principle ...
The University of South Africa has built a small observatory for teaching and
research. The 35cm Schmidt-Cassegrain reflector and the SSP-5A photometer with
Johnson UBV filters were used to evaluate the local possibilities ...
Chapter 1 reviews better-known factorization theorems of a square
matrix. For example, a square matrix over a field can be expressed
as a product of two symmetric matrices; thus square matrices over
real numbers can be ...
In developing an understanding of real-world problems,
researchers develop mathematical and statistical models. Various
model selection methods exist which can be used to obtain a
mathematical model that best describes ...
This study is presented in nine chapters as follows:
Chapter one reviews the reported literature on the NMR of natural diamond. The NMR
signal of diamond consists on a single line at 39 ppm from TMS and two hyperfine ...
The lower and upper independent, domination and irredundant numbers of the graph
G = (V, E) are denoted by i ( G) , f3 ( G), 'Y ( G), r ( G), ir ( G) and IR ( G) respectively.
These six numbers are called the domination ...
The unique problems encountered when analyzing weather data sets - that is, measurements taken while conducting a meteorological experiment- have forced statisticians to reconsider the conventional analysis methods and ...
In this thesis we investigate the application of two heuristic methods, genetic
algorithms and tabu/scatter search, to the optimisation of realistic portfolios. The
model is based on the classical mean-variance approach, ...
In the paper [HSS] Herrlich, Salicrup and Strecker were able to show that Kuratowski / Mrowka's Theorem concerning compactness for topological spaces could be applied to a wider setting. In this dissertation, which is based ...
Interval analysis is an essential tool in the construction of validated numerical solutions
of Initial Value Problems (IVP) for Ordinary (ODE) and Partial (PDE) Differential
Equations. A validated solution typically ...
The queens graph Qn has the squares of then x n chessboard as its vertices; two squares
are adjacent if they are in the same row, column or diagonal. A set D of squares of
Qn is a dominating set for Qn if every square ...