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Browsing Research Articles (Mathematics and Applied Mathematics) by Title

Browsing Research Articles (Mathematics and Applied Mathematics) by Title

Now showing items 1-20 of 86

Analysis of numerical differentiation methods applied to time domain electromagnetic (TDEM) geophysical data in the S-layer differential transform

Combrinck, M. (Elsevier, 2009)

The S-layer differential transform produces subsurface conductivity-depth images from Time Domain Electromagnetic (TDEM) data. It is a very fast method, but suffers from high noise levels due to the implementation of two ...
Are OBE-trained learners ready for university mathematics?

Engelbrecht, Johann C. (Johannes Cornelis), 1946-; Harding, Ansie; Phiri, Patrick A. (Association of Mathematics Education of South Africa, 2010-12)

The 2009 intake of university students were the first to have received complete school education within the recently implemented Outcomes‐Based Education (OBE) system. A feature of the matriculation examination results ...
Asymptotic behavior of solutions of stochastic evolution equations for second grade fluids

Razafimandimby, Paul Andre; Sango, Mamadou (Elsevier, 2010-06)

In this Note we show that under suitable conditions on the data we can construct a sequence of solutions of the stochastic second grade fluid that converges to the probabilistic strong solution of the stochastic Navier–Stokes ...
A-transvections and Witt’s theorem in symplectic A-modules

Ntumba, Patrice P.; Anyaegbunam, Adaeze C. (Springer, 2011)

Building on prior joint work by Mallios and Ntumba, we study transvections (J. Dieudonn´e), a theme already important from the classical theory, in the realm of Abstract Geometric Algebra, referring herewith to symplectic ...
A blended learning Grade 12 intervention using DVD technology to enhance the teaching and learning of mathematics

Padayachee, Pragashni; Boshoff, Hennie; Olivier, Werner; Harding, Ansie (Association of Mathematics Education of South Africa, 2011-09-13)

This article describes the experiences and mathematics performance of Grade 12 learners selected to participate in a mathematics intervention project using digital video disk (DVD) technology within a blended learning ...
Bounds for extreme zeros of some classical orthogonal polynomials

Driver, Kathy (Cathryn Helena Stanford); Jordaan, Kerstin Heidrun (Elsevier`, 2012-09)

We use mixed three term recurrence relations typically satis ed by classical orthogonal polynomials from sequences corresponding to di erent parameters to derive upper (lower) bounds for the smallest (largest) zeros ...
Can you show you are a good lecturer?

Wood, Leigh N.; Harding, Ansie (Taylor & Francis, 2007-01)

Measurement of the quality of teaching activities is becoming increasingly important since universities are rewarding performance in terms of promotion, awards and bonuses and research is no longer the only key performance ...
Cayley graphs of given degree and diameters 3, 4 and 5

Vetrik, Tomas (Elsevier, 2013-02-06)

Let Cd,k be the largest number of vertices in a Cayley graph of degree d and diameter k. We show that Cd,3 ≥ 3 16 (d − 3)3 and Cd,5 ≥ 25( d−7 4 )5 for any d ≥ 8, and Cd,4 ≥ 32( d−8 5 )4 for any d ≥ 10. For sufficiently ...
Classes and theories of trees associated with a class of linear orders

Goranko, Valentin; Kellerman, Ruaan (Oxford University Press, 2011-02)

Given a class of linear order types C, we identify and study several different classes of trees, naturally associated with C in terms of how the paths in those trees are related to the order types belonging to C. We ...
Constructing universal graphs for induced-hereditary graph properties

Broere, Izak; Heidema, Johannes; Mihok, Peter (Springer, 2013)

Rado constructed a (simple) denumerable graph R with the positive integers as vertex set with the following edges: For given m and n with m < n, m is adjacent to n if n has a 1 in the m'th position of its binary expansion. ...
The convergence space of minimal usco mappings

Anguelov, Roumen; Kalenda, O.F.K. (Springer, 2009)

A convergence structure generalizing the order convergence structure on the set of Hausdorff continuous interval functions is defined on the set of minimal usco maps. The properties of the obtained convergence space are ...
Convexity of the zeros of some orthogonal polynomials and related functions

Jordaan, Kerstin Heidrun; Tookos, Ferenc (Elsevier, 2009)

We study convexity properties of the zeros of some special functions that follow from the convexity theorem of Sturm. We prove results on the intervals of convexity for the zeros of Laguerre, Jacobi and ultraspherical ...
Cross-immunity-induced backward bifurcation for a model of transmission dynamics of two strains of influenza

Garba, Salisu M.; Safi, Mohammad A.; Gumel, A.B. (Elsevier, 2013-06)

A new deterministic model for the transmission dynamics of two strains of in- uenza is designed and used to qualitatively assess the role of cross-immunity on the transmission process. It is shown that incomplete ...
Density process of the minimal entropy martingale measure in a stochastic volatility market : a PDE approach

Kufakunesu, Rodwell (Taylor & Francis, 2011)

In a stochastic volatility market the Radon-Nikodym density of the minimal entropy martingale measure can be expressed in terms of the solution of a semilinear partial differential equation (PDE). This fact has been ...
Deterministic homogenization of integral functionals with convex integrands

Nguetseng, Gabriel; Nnang, Hubert; Woukeng, Jean Louis (2010)

In order to widen the scope of the applications of deterministic homogenization, we consider here the homogenization problem for a family of integral functionals. The homogenization procedure tending to be classical, the ...
Deterministic model for the role of antivirals in controlling the spread of the H1N1 influenza pandemic

Imran, Mudassar; Malik, Mohammad Tufail; Garba, Salisu M. (Department of Mathematics, Texas State University-San Marcos, 2011-11-18)

A deterministic model is designed and used to theoretically assess the impact of antiviral drugs in controlling the spread of the 2009 swine influenza pandemic. In particular, the model considers the administration of ...
Embedding a Latin square with transversal into a projective space

Pretorius, Lou M. (Lourens Martin); Swanepoel, Konrad Johann (Elsevier, 2011-07)

A Latin square of side n defines in a natural way a finite geometry on 3n points, with three lines of size n and n2 lines of size 3. A Latin square of side n with a transversal similarly defines a finite geometry on 3n+1 ...
An excursion into classical nonlinear acoustics

Sauer, N. (Niko) (Elsevier, 2010)

This paper is concerned with the derivation of the partial differential equations that govern the propagation of sonic disturbances in an ideal gas under isentropic conditions. The result is a quasilinear hyperbolic system ...
Existence results for a polymer melt with an evolving natural configuration

Djoko, J.K. (Jules Kamdem); Reddy, B. Dayanand, 1953- (World Scientific, 2012-01)

We consider a set of equations governing the behaviour of a polymer melt which is modelled as a viscoelastic fluid possessing a natural, or stress-free state. The natural configuration is characterized through a symmetric, ...
Extreme value theory – an application to the South African equity market

Wentzel, D.C. (Investment Analysts Society of Southern Africa, 2007)

No abstract available

Now showing items 1-20 of 86

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