Author:Watson, BP; Kuijpers, JS; Henry, G; Palmer, CE; Ryder, JADate:Oct 2008Uniaxial tests performed on core from instrumented sites at Amandelbult 1 shaft, Impala 10 shaft and Union Section Spud-shaft showed a nonlinear elastic relationship between applied load and induced deformation. This nonlinear behaviour does ...Read more
Author:Casini, G; Meyer, T; Moodley, K; Varzinczak, IDate:Jul 2013The introduction of defeasible reasoning in Description Logics has been a main research topic in the field in the last years. Despite the fact that various interesting formalizations of nonmonotonic reasoning for the TBox have been proposed, ...Read more
Author:Ranchod, P; Rosman, Benjamin S; Konidaris, GDate:Oct 2015We present a method for segmenting a set of unstructured demonstration trajectories to discover reusable skills using inverse reinforcement learning (IRL). Each skill is characterised by a latent reward function which the demonstrator is ...Read more
Author:Shuttleworth, RGDate:1950The combustion of carbonaceous fuels is now recognized as occurring by means of both a heterogeneous reaction and a homogenous reaction.Read more
Author:Nortje, R; Britz, K; Meyer, TDate:Dec 2012Modularization is an important part of the modular design and maintenance of large scale ontologies. Syntactic locality modules, with their desirable model theoretic properties, play an ever increasing role in the design of algorithms for ...Read more
Author:Britz, K; Meyer, T; Varzinczak, IDate:Dec 2012One of the most successful approaches to the formalization of commonsense reasoning is the work by Lehmann and colleagues, known as the KLM approach, in which defeasible consequence relations with a preferential semantics are studied. In spite ...Read more
Author:Waterhouse, JS; Switsur, VR; Barker, AC; Carter, AHC; Hemming, DL; Loader, NJ; Robertson, IDate:Apr 2004In order to predict accurately how elevated atmospheric CO2 concentrations will affect the global carbon cycle, it is necessary to know how trees respond to increasing CO2 concentrations. In this paper, the response is examined over the period ...Read more
Author:Van Wyk, BJ; Van Wyk, MA; Van Den Bergh, FDate:Jun 2007The concept of an Image Difference Spectrum, a novel tool for the extraction of global image information, is introduced. It is shown that Image Difference Spectra are fast alternatives to granulometric curves, also referred to as pattern ...Read more
Author:Sevenster, PG; Geldenhuis, CJDate:1964The purpose of this investigation was to assess the suitability of a simple strength test in the study of the effects if climatic conditions on the breaking characteristics of South African coals.Read more
Author:Casini, G; Gerber, A; Meyer, TDate:Oct 2012Conceptual modeling is nowadays mostly done using languages such as Entity-Relationship (ER) Models, Unified Modeling Language (UML), and Object-Role Modeling (ORM). These models are used to depict the ontological organization of relevant ...Read more
Author:Meyering, MC; Fourie, PJ; Sevenster, PGDate:1969The initial event in a coal dust explosion is the creation of a localized air blast, which is generally caused by a methane explosion.Read more
Author:Joubert, FEDate:1967Some years ago preliminary work was undertaken to develop a device by means of which the methane pressure in a coal seam could be measured. During the past year this work was again taken up and developed to a stage where actual measurements ...Read more
Author:Van der Walt, PJDate:1956It is well known that there is a shortage of coking coal in South Africa, and that methods of producing suitable coking suitable coking coal from sources hitherto considered unsuitable, is receiving considerable attention. The pilot plant ...Read more
Author:McDonald, Andre M; Van Wyk, MDate:Oct 2020A new approach to solving a more general formulation of the inverse Frobenius-Perron problem, which requires the construction of a one-dimensional ergodic map with prescribed invariant probability density function and power spectral density, ...Read more
Author:Shatalov, MY; Fedotov, I; Joubert, SDate:2006Conventional methods of solution of the Helmholtz integral equation consist in discretization of a radiating/scattering boundary on multiple boundary elements, assumption of a smooth distribution of the velocity potential on every element and ...Read more
Author:Horak, RM; Learmonth, RA; Maharaj, VJDate:27 Feb 1995The preparation of 2-[2H]-l-(p-nitrophenyl)-1,2-epoxyheptan-3-one and its subsequent reduction by baker's yeast to the 2,3-diol is described. The mechanism of the reduction of the epoxide was determined using the B-2H isotope shift in 3C ...Read more
Author:Thakur, A; Moyo, P; Van Der Westhuizen, Carl Johan; Yang, HO; Maharaj, VDate:Jul 2021Elevated levels of the amylo ß-proteins (Aß), particularly Aß42, are associated with a high risk of Alzheimer's disease (AD). The Aß proteins are produced from cellular processing of the amyloid precursor proteins (APPs). To identify natural ...Read more