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Backup bearing modelling for turbo machines with high axial and radial loads
(s.n, 2014)
The use of active magnetic bearings (AMBs) in turbo
machines is an active research topic and the implementation in
industrial applications is becoming commonplace. This is
especially true when investigating the backup ...
Ontwerp van ’n transmissielyn-monteringsoplossing vir ’n onbemande vier-rotor helikopter
(AOSIS, 2014)
A need
exists for a transmission line monitoring system for use by Eskom to inspect transmission
lines. A solution which uses a single board computer, visual and infrared cameras and a
GPS module is described. Real-time ...
A generalized additive neural network application in information security
(Tadbir Operational Research Group, 2014)
Traditionally spam has been considered as an inconvenience requiring workers to sift through and delete large numbers of e-mail messages per day. However, new developments and the Internet have dramatically transformed the ...
Design of a transmission line monitoring solution for an unmanned quadcopter
(2014)
Eskom owns thousands of kilometres of transmission lines that need to be inspected in order to plan maintenance. Current methods of inspection are costly and ineffective and could pose safety risks. Systems already developed ...
Modelling the stellar soft-photon energy density of globular clusters
(South African Institute of Physics, 2014)
Recent observations by e.g. Fermi LAT and H.E.S.S. have revealed globular clusters to be sources of high-energy and very-high-energy gamma rays. It has been suggested that the presence of large numbers of millisecond pulsars ...
The anatomy of γ-ray pulsar light curves
(South African Institute of Physics, 2014)
To obtain constraints on the inclination and observer angles, <i>α</i> and <i>ζ</i>, of a <i>γ</i>-ray pulsar from its observed light curve (LC), we make use of geometric models detailing the position and extent of emission ...
Spatial and temporal assessment of atmospheric OC and BC concentrations at South African debits sites
(SASAS, 2014)
The baseline of uncertainty in aerosol radiative forcing is large and depends on aerosol
characteristics (e.g. size and composition), which can vary significantly on a regional scale.
Sources (natural, anthropogenic and ...
The detailed nature of active central cluster galaxies
(South African Institute of Physics, 2014)
We present detailed IFU observations of the central few kiloparsecs of the ionised nebulae surrounding four active central cluster galaxies in cooling flow clusters. All four galaxies have Hα filaments, and existing data ...
Empirical investigation of systems cost estimation models in the Limpopo Province of South Africa: a requirement modelling problem
(CSREA, 2014)
There are many factors believed to be important to systems development cost estimation. However an in-depth analysis demonstrates requirements as central cost drivers. The various transformations requirements go through ...
Spam email classifcation with generalized additive neural networks using ensemble methods
(SATNAC, 2014)
Solutions to minimize the amount
of junk mail we receive are not yet optimal and
thus research towards an improved spam email
classifier is ongoing. Traditional content and listbased
filters are less effective than ...