Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 818-837 of 4825
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Conservation laws and traveling wave solutions of a generalized Nonlinear ZK-BBM equation
(Hindawi publishing corporation, 2014)We study a generalized two-dimensional nonlinear Zakharov-Kuznetsov-Benjamin-Bona-Mahony (ZK-BBM) equation, which is in fact Benjamin-Bona-Mahony equation formulated in the ZK sense. Conservation laws for this equation are ... -
Conservation laws of coupled semilinear wave equations
(World Scientific Publishing, 2016)A complete classification of all low-order conservation laws is carried out for a system of coupled semilinear wave equations which is a natural two-component generalization of the nonlinear Klein-Gordon equation. The ... -
Conservation of fishes in the Elands River, Mpumalanga, South Africa: past, present and future
(AOSIS, 2014)In an isolated reach, between two large natural waterfalls in the Elands River in Mpumalanga, populations of a critically endangered Kneria sp., the endangered Chiloglanis bifurcus and a genetically unique population of ... -
Conservation of fragmented grasslands as part of the urban green infrastructure: how important are species diversity, functional diversity and landscape functionality?
(Springer, 2015)Natural remnants, such as fragmented grasslands form an integral part of the urban green infrastructure in the Grassland biome of South Africa. Nearly 30 % of natural grasslands are transformed with only 1 % formally ... -
Conservation of the coding regions of the glycine N-acyltransferase gene further suggests that glycine conjugation is an essential detoxification pathway
(Elsevier, 2015)Thorough investigation of the glycine conjugation pathway has been neglected. No defect of the glycine conjugation pathway has been reported and this could reflect the essential role of glycine conjugation in hepatic ... -
Conservation status of Stenostelma umbelluliferum and its implications for management of biodiversity
(Elsevier, 2020)Stenostelma umbelluliferum is an enigmatic plant that has elicited much attention in recent years. Initially thought to be extinct, its rediscovery in an urban area created turmoil in both conservation management and urban ... -
Conserved quantities and solutions of a (2+1)-dimensional H a ˇ r a ˇ gus-Courcelle–Il’ichev model
(Elsevier, 2016)In this paper we study a (2+1)-dimensional Ha?ra?gus-Courcelle-Il'ichev equation (HCI) that models gravity-capillary and flexural-gravity waves. This equation is a generalization of the Kadomtsev-Petviashvili equation, and ... -
Considerations in Grounded Theory Research Method: A reflection on the lessons learned
(2010)This paper is a discussion on the practical issues faced by Information Systems (IS) professionals when they employ Grounded Theory Method (GTM) in Information Systems research. Various strands of GTM are in use, all of ... -
Considering complexities in unique African planning approaches: abstracting the role of African urban residents
(WIT Press, 2017)Africa is currently the fastest urbanising region in the world and has subsequently become the centre of continuously growing attention from planning practitioners and academics. Many of these scholars argue for a unique ... -
Considering flood risk in spatial development planning: a land use conflict analysis approach
(AOSIS, 2019)Flooding is the predominant natural hazard observed in Africa, and it often leads to damage to property and losses in human lives. To ensure that the detrimental effects of flooding are kept to a minimum, flood-prone areas ... -
Considering new urbanism, new ruralism and green urbanism in response to multifunctionality: the case of Verkykerskop, South Africa
(WIT Press, 2017)Paul Davidoff charged planners in 1965, as a profession making urban life more beautiful, exciting, creative and more just, as having little to say. The task thereupon was to train a generation of planners to go well ... -
Considering planning approaches in the global south and learning from co-production in South Africa’s informal backyard rental sector
(WIT Press, 2017)The global South has traditionally been regarded as oppressed and subjugated, grappling to reach western ideals on the appropriate, desirable and modern. However, framing the developing world as such, fails to recognise ... -
Considering the influence of human trust in practical social engineering exercises
(IEEE, 2014)There are numerous technical advances in the field of information security. However, the application of information security technologies alone is often not sufficient to address security issues. Human factors play an ... -
Conspecific density and environmental complexity impact behaviour of turquoise killifish (Nothobranchius furzeri)
(Wiley, 2020)Fish models are essential for research in many biological and medical disciplines. With a typical lifespan of only 6 months, the Turquoise killifish (Nothobranchius furzeri) was recently established as a time‐ and ... -
Constraining a general-relativistic frame-dragging model for pulsed radiation from a population of millisecond pulsars in 47 Tucanae using GLAST LAT
(IOP Publications, 2008)Although only 22 millisecond pulsars (MSPs) are currently known to exist in the globular cluster (GC) 47 Tucanae, this cluster may harbor 30-60 MSPs, or even up to ∼200. In this Letter, we model the pulsed curvature radiation ... -
Constraining relativistic bow shock properties in rotation-powered millisecond pulsar binaries
(AAS, 2017)Multiwavelength follow-up of unidentified Fermi sources has vastly expanded the number of known galactic-field "black widow" and "redback" millisecond pulsar binaries. Focusing on their rotation-powered state, we interpret ... -
Constraining the dark matter density in galaxy clusters
(PoS, 2015)We illustrate the potential of using stellar velocity dispersion profiles of brightest cluster galaxies (BCGs), in combination with X-ray and weak-lensing derived cluster mass profiles, to constrain the matter distribution ... -
Constraining the emission geometry and mass of the white dwarf pulsar AR Sco using the rotating vector model
(IOP Publishing, 2019)We apply the standard radio pulsar rotating vector model to the white dwarf (WD) pulsar AR Sco's optical polarization position angle swings folded at the WD's spin period as obtained by Buckley et al. Owing to the long ... -
Constraining the environment of neutrino-emitting regions in jets of FSRQs
(Sissa Medialab, 2019)Recently, the gamma-ray blazar TXS 0506+056 has been proposed as the source of neutrino events detected by IceCube in 2014-15 and 2017. This has further pushed the idea of blazar jets being among those cosmic sites where ... -
Constraining the geometry of PSR J0855-4644: a nearby pulsar wind nebula with double torus/jet morphology
(EDP Sciences, 2017)Aims. PSR J0855−4644 is a fast-spinning, energetic pulsar discovered at radio wavelengths near the south-eastern rim of the supernova remnant RX J0852.0−4622. A follow-up XMM-Newton observation revealed the X-ray counterpart ...