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Now showing items 1-10 of 11

#### Renewable energy education in Botswana: needs, status and proposed training programs

(Elsevier Science Ltd. http://www.sciencedirect.com/science/journal/09601481, 2002-01)

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 ...

#### 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 ...

#### Thermal analysis and annealing temperature dependence of electrical properties in Sn10Sb20Se70 glassy semiconductor

(Springer Netherlands, 2008)

The melt-quenched Sn10Sb20Se70 sample in the
bulk form was used to prepare films on well-cleaned glass
substrates by thermal evaporation method. The activation
energy for glass transition (apparent) and crystallization
has ...

#### 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.

#### 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 Julian-days averages of sunshine duration and solar ...

#### 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 ...

#### A study of pulsatile blood flow modeled as a power low fluid in a constricted tube

(Elsevier; www.elsevier.com/locate/ichmt, 2007-07)

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 ...

#### 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 semi-parallel lightlike hypersurfaces of indefinite Kenmotsu manifolds

(Birkhäuser Basel. http://www.springerlink.com/content/107580/?p=1930c3cc1de944feae211b785b3b42a4&pi=0, 2009)

We study semi-parallel lightlike hypersurfaces of an indefinite
Kenmotsu manifold, tangent to the structure vector field. Some Theorems
on parallel and semi-parallel vector field, geodesibility of lightlike
hypersurfaces ...

#### 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 ...