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Perceptive approaches to the interpretation and realisation of South Africa's Constitutional Environmental Right
(School of Law, University of Natal, 2009)
Electron anisotropies in the inner heliosphere
(Elsevier, 2008)
A three-dimensional numerical model is used to study the propagation and modulation of a few MeV Jovian and galactic electrons in the inner heliosphere. The main aim of the work is to compute the three-dimensional electron ...
Probing the universe with cosmic rays using high performance computing
(ASSAf, 2008)
I report on the research activities of the South African Centre for High Performance Computing carried out at the Unit for Space Physics at North-West University, Potchefstroom, during 2007/8. Background is given on the ...
Modulation of galactic cosmic ray protons and electrons during an unusual solar minimum
(IOP Publishing, 2009)
During the latest Ulysses out-of-ecliptic orbit the solar wind density, pressure, and magnetic field strength have been the lowest ever observed in the history of space exploration. Since cosmic ray particles respond to ...
Are anomalous cosmic rays the main contribution to the low-energy galactic cosmic ray spectrum?
(IOP Publishing, 2008)
While the high-energy part of the Galactic cosmic ray spectrum is well observed, its nature at energies below
about 1 GeV nucleon-1 is still not known well. Recent in situ measurements made with the Voyager 1 spacecraft
in ...
Challenges to cosmic ray modeling: from beyond the solar wind termination shock
(Elsevier, 2008)
Voyager 1 crossed the solar wind termination shock on December 16, 2004 at a distance of 94 AU from the Sun, to become the first spacecraft to explore the termination shock region and to enter the heliosheath, the final ...
Email security awareness: a practical assessment of employee behaviour
(Springer, 2007)
Email communication is growing as a main method for individuals
and organizations to communicate. Sadly, this is also an emerging means of
conducting crime in the cyber world, e.g. identity theft, virus attacks etc. ...
Investigation of the multiple-component structure of the 20 January 2005 cosmic ray ground level enhancement
(American Geophysical Union, 2008)
Worldwide observations of the cosmic ray ground level enhancement (GLE) of
20 January 2005 are used to investigate a commonly observed but poorly understood
feature of this class of event. It is argued that the GLE ...
A calibration neutron monitor: energy response and instrumental temperature sensitivity
(American Geophysical Union, 2008)
Neutron monitors are integral detectors of secondary cosmic rays. Since each of them has its own detection efficiency, energy spectra cannot readily be derived from their observations. To circumvent this problem, latitudinal ...
Discovery of very high energy y-ray emission from Centaurus A with HESS.
(IOP Publishing, 2009)
We report the discovery of faint very high energy (VHE; E > 100 GeV) γ-ray emission from the radio galaxy Centaurus A in observations performed with the High Energy Stereoscopic System (H.E.S.S.) experiment, an imaging ...