Search
Now showing items 31-40 of 82
Electron-LO-phonon scattering near a current-carrying core
(Elsevier Science Ltd. http://www.elsevier.com/wps/find/journaldescription.cws_home/622948/description#description, 2008)
A calculation is presented on the scattering rates of electrons via the bulk spectrum of longitudinal
optical phonons near a current-carrying core of radius R employing the Frohlich interaction Hamiltonian.
The electrons ...
The theory of attenuated total reflection by surface polaritons on corrugated semi-infinite media
(Elsevier Science Ltd. www.elsevier.com/locate/physb, 2002-02)
The experimental techniques of attenuated total reflection and grating-coupling were originally employed separately
as probes for surface polaritons. However, as far back as the mid-1970s, some value was found in actually ...
Aeromagnetic and Landsat TM structural interpretation for identifying regional groundwater exploration targets, south-central Zimbabwe Craton
(Elsevier Science Ltd. www.elsevier.com/locate/jappgeo, 2008)
Aeromagnetic (AM) and Landsat Thematic Mapper (TM) data from the south-central Zimbabwe Craton have
been processed for the purpose of regional structural mapping and thereby to develop strategic models for
groundwater ...
Gravity evidence for a larger Limpopo Belt in southern Africa and geodynamic implications
(Royal Astronomical Society. http://www.wiley.com/bw/journal.asp?ref=0956-540X&site=1, 2002)
The Limpopo Belt of southern Africa is a Neoarchean orogenic belt located between two older Archean provinces, the Zimbabwe craton to the north and the Kaapvaal craton to the south. Previous studies considered the Limpopo ...
Determination of magnetite grain-size using the Hopkinson effect - examples from Botswana rocks
(Botswana Geoscientists Association, 2001)
The Hopkinson effect is the increase of magnetic susceptibility with temperature from near room temperature to near the Curie point. Although this effect has been known for more than a century, it has not been effectively ...
Piezoelectric energy harvesting devices: an alternative energy source for wireless sensors
(Hindawi Publishing Corporation, http://www.hindawi.com/journals/smr/, 2012)
The recent advances in ultralow power device integration, communication electronics, and microelectromechanical systems
(MEMS) technology have fuelled the emerging technology of wireless sensor networks (WSNs). The spatial ...
Simulation of solar radiation conditions in coastal and continental areas by using a new algorithm
(David Publishing Company, http://www.davidpublishing.com/journals_info.asp?jId=1000, 2011)
An algorithm developed at the University of Botswana is used to study solar radiation conditions in Namibia, South Africa, Mozambique and Botswana. The synoptic stations chosen for the study differ by meteorological ...
Effect of annealing on the structural, optical and electrical properties of ITO films by RF sputtering under low vacuum level
(Elsevier Ltd, 2008)
Indium tin oxide (ITO) thin films were prepared by RF sputtering of ceramic ITO target in pure argon
atmosphere at a high base pressure of 3 10 4mbar without substrate heating and oxygen admittance.
The use of pure argon ...
Understanding Nickel Thin Film crystallization using X-Ray Diffractometry
(Bioline International. http://www.ajol.info/journal_index.php?jid=90, 2007-06)
Normal, helical and zigzag deposited Ni films were produced by letting a vapour stream of source
material impinge on Corning 1737 glass substrates at oblique incidence while rotating the substrate during deposition.
Films ...
Finite element modeling of a piezoelectric composite beam and comparative performance study of piezoelectric materials for voltage generation
(International Scholarly Research Network, http://www.hindawi.com/isrn/materials.science/, 2012)
A comparative study of the traditional PZT ceramics and new single crystals is critical in selecting the best material and
optimization of transducer design for applications such as conversion of ambient vibrations into ...