Browsing Research articles (Dept of Mathematics) by Issue Date
Now showing items 120 of 34

Stochastic models for sunshine duration and solar irradiation
(Elsevier Science Ltd: http://www.elsevier.com/wps/find/journaldescription.cws_home/969/description#description, 2002)Abstract Harmonic analysis of sunshine duration and solar irradiation measured at Sebele, Botswana is carried out. The data used consists of the monthly averages and the Juliandays averages of sunshine duration and solar ... 
Renewable energy education in Botswana: needs, status and proposed training programs
(Elsevier Science Ltd. http://www.sciencedirect.com/science/journal/09601481, 200201)Lack of trained manpower for repair and maintenance of solar energy devices in Botswana has resulted in failure of devices, loss of revenue, and dwindling of consumer faith in solar technologies. The government of Botswana ... 
Homotopy Lie Algebra of Spaces for Hyperbolic Coformal 2Cones
(International Press; http://www.intlpress.com/HHA/, 2004)In this paper, we show that the rational homotopy Lie algebra of classifying spaces for certain types of hyperbolic coformal 2cones is not nilpotent. 
Teachers’ experiences with an adapted IGCSE physics syllabus in Botswana
(Elsevier, www.elsevier.com/locate/ijedudev, 2005)This paper focuses on teachers’ experiences with implementing a modified International General Certificate of Secondary Education (IGCSE) physics syllabus in Botswana. The syllabus, characterised by a new organisational ... 
A numerical study of some modified differential evolution algorithms
(Elsevier; www.elsevier.com/locate/ejor, 2006)Modifications in mutation and localization in acceptance rule are suggested to the differential evolution algorithm for global optimization. Numerical experiments indicate that the resulting algorithms are considerably ... 
String Homology of a Product of Spheres and the Witt Algebra
(Nova Science Publishers, Inc.; www.novapublishers.com; reprinted with permission from Nova Science Publishers, Inc., 2007)Let X be a finite product of even dimensional spheres, we show that the string homology of X contains a finite product of copies of the Witt Lie algebra. 
A study of pulsatile blood flow modeled as a power low fluid in a constricted tube
(Elsevier; www.elsevier.com/locate/ichmt, 200707)A mathematical model for the pulsatile blood flow in a small vessel in a cardiovascular system with a mild stenosis is analyzed. Blood is modeled as a power low fluid and the differential approximation for the heat flux ... 
Thermal analysis and annealing temperature dependence of electrical properties in Sn10Sb20Se70 glassy semiconductor
(Springer Netherlands, 2008)The meltquenched Sn10Sb20Se70 sample in the bulk form was used to prepare films on wellcleaned glass substrates by thermal evaporation method. The activation energy for glass transition (apparent) and crystallization has ... 
Improved particle swarm algorithms for global optimization
(Elsevier Ltd. www.elevier.com/locate/amc, 2008)Particle swarm optimization algorithm has recently gained much attention in the global optimization research community. As a result, a few variants of the algorithm have been suggested. In this paper, we study the efficiency ... 
Screen integrable lightlike hypersurfacesof indefinite sasakian manifolds
(Birkhäuser Basel. http://www.springerlink.com/content/110963/?p=c42ba01ff0bd482b81a3ebdf3b649c9a&pi=0, 2009)We investigate lightlike hypersurfaces of indefinite Sasakian manifolds, tangent to the structure vector field and whose screen distribution is integrable. We prove some results on parallel vector fields and on a leaf ... 
On semiparallel lightlike hypersurfaces of indefinite Kenmotsu manifolds
(Birkhäuser Basel. http://www.springerlink.com/content/107580/?p=1930c3cc1de944feae211b785b3b42a4&pi=0, 2009)We study semiparallel lightlike hypersurfaces of an indefinite Kenmotsu manifold, tangent to the structure vector field. Some Theorems on parallel and semiparallel vector field, geodesibility of lightlike hypersurfaces ... 
On the OrliczPettis theorem for integrals
(Pushpa Publishing House, www.pphmj.com, 201010)In this note, we propose a more efficient approach to the definition of the integral of Banachvalued functions that enables us to give an improved version of the OrliczPettis theorem for integrals. 
Vector measures of bounded semivariation and associated convolution operators
(Glasgow Mathematical Journal Trust, http://journals.cambridge.org/action/displayJournal?jid=GMJ, 2011)Let G be a compact metrizable abelian group, and let X be a Banach space. We characterize convolution operators associated with a regular Borel Xvalued measure of bounded semivariation that are compact (resp; weakly ... 
Exponential polynomials on commutative hypergroups
(Springer, www.springer.com, 2013)Polynomials and exponential polynomials play a fundamental role in the theory of spectral analysis and spectral synthesis on commutative groups. Recently several new results have been published in this field. Spectral ... 
The LeviCivitá equation, vector modules and spectral synthesis
(Banach Center Polish Academy of Sciences, 2013)The purpose of this paper is to give a survey on some recent results concerning spectral analysis and spectral synthesis in the framework of vector modules and in close connection with the LeviCivita functional equation. ... 
More on equivalence properties of RadonNikodym property types and Complete Continuity property types
(Pushpa Publishing House, www.pphmj.com, 201301)We study the equivalence property of the I and IILRadonNikodým property (resp. I and IILcomplete continuity property) types of Banach spaces. As a byproduct, we obtain a proof of the following: F. LustPicard’s ... 
Unified approach to vector valued integration
(Pushpa Publishing House, www.pphmj.com, 201306)We introduce a natural and more flexible approach to the definition of vector valued integral that will completely forgo any measurability assumption, strengthen the existing various classical concepts of ... 
On the differentiability of vector valued additive set functions
(Scientific Research, http://www.scirp.org, 201311)The LebesgueNikodým Theorem states that for a Lebesgue measure λ:Σ〖⊂2〗^Ω→[0,∞) an additive set function F:Σ→R which is λabsolutely continuous is the integral of a Lebegsue integrable a measurable function ... 
On summable bases in Banach spaces
(Science Domian International, www.sciencedomain.org, 20140624)We introduce the notion of summable bases that naturally generalizes the notion of unconditional sequence bases for Banach spaces. We shall be particularly interested in some classical results on sequences and series in ... 
A new general approach to vector valued stochastic integration
(International Journal of Modeling and Optimization, www.ijmo.org, 201408)We use an extended theory of integral that generalizes the integration of vector valued functions with respect to nonnegative, monotonic,countably subadditive set functions, in order to introduce a new approach to stochastic ...