Hidden sector or dark sector states appear in many extensions to the Standard
Model (SM), to provide particle mediators for dark matter in the universe or to
explain astrophysical observations such as the positron excess ...
1720 MHz OH masers have been detected towards a number of supernova remnants (SNRs) at the shock interface where the SNR slams into the interstellar medium. Models indicate that these masers are shock excited and can only ...
The syntheses of siloxyl and hydroxyl chain end functionalized polystyrene and
poly(methyl methacrylate) by Atom Transfer Radical Polymerization (ATRP) were
effected by the following methods:
(a) α-Siloxyl functionalized ...
Therapeutic horseback riding (THR) uses the horse as a therapeutic apparatus in physical
and psychological therapy. This dissertation suggests a more appropriate technique for
measuring the effect of THR. A research ...
In this contribution the sinc basis functions are used to numerically solve the
Schrödinger equation in one and two dimensions for a number of potentials.
The calculations are done using the Python and Numpy modules. ...
Many concrete problems, ranging from Portfolio selection to Water resource
management, may be cast into a multiobjective programming framework. The
simplistic way of superseding blindly conflictual goals by one objective ...
Abstract
Kermack-McKendrick epidemic model is considered as the basis from which many other compartmental models were developed. But the development of fractional calculus applied to mathematical epidemiology ...
An attempt is made in this thesis to study some stochastic models of both reliability and
inventory systems with reference to the following aspects:
(i) the confidence limits with the introduction of common-cause ...
The importance of robust variable selection and regularization as solutions to the collinearity influential
high leverage points’ adverse effects in a quantile regression (QR) setting cannot be overemphasized,
just as ...
The research will analyze and compare the current research on the spectral
factorization of non-singular and singular matrices. We show that a nonsingular non-scalar matrix A can be written as a product A = BC where the ...
It is the aim of this paper to review some of the work done on stable matching, and on stable marriage problems in particular.
Variants of the stable marriage problem will be considered, and the similarities and differences ...
The aim of this work is to discuss the effects found in static and dynamic wormholes that occur as a solution of Einstein equations in general relativity. The ground is prepared by presentation of "faster than light" ...
Unemployment in South Africa has continued to be consistently high as indicated by the various reports published by Statistics South Africa. Unemployment is a global problem where in Organisation for Economic Co-operation ...
In this thesis the two disciplines of Statistics and Artificial Neural Networks
are combined into an integrated study of a data set of a weather modification
Experiment.
An extensive literature study on artificial neural ...
Return on Capital Employed (ROCE) is a popular financial instrument and communication tool for the appraisal of companies. Often, companies management and other practitioners use untested rules and behavioural approach ...
The poor performance by South African pupils in The Third International Mathematics and Science Study highlighted the importance of and need for Continuing Professional Development (CPD) for South African mathematics ...
NaYF4:Yb3+/Er3+ and NaGdF4:Yb3+/Nd3+ nanocrystals were prepared using a solution combustion (SC) method and their properties were evaluated for potential use as photon harvesters in photovoltaic solar cells (PSCs). The ...
Over the past two decades there has been an upsurge in interest in structural equation
modelling (SEM). Applications abound in the social sciences and econometrics, but
the use of this multivariate technique is not so ...
The objective of this study was to investigate whether community print media is fulfilling its developmental mandate in society using a comparative study of Alex News and Greater Alex Today community newspapers. This study ...
Polycrystalline Zn1-xCrxO (0.01 ≤ x ≤ 0.09) samples synthesized by solid state reaction technique were sintered at different temperatures following slow step sintering schedule. Structural, micro-structural, optical, ...