Author:Candy, LP; Lasenby, JDate:Apr 2010The orientation vector differential equation was first derived by John Bortz to improve the accuracy of strapdown inertial navigation attitude algorithms. These algorithms previously relied on the direct integration of the direction cosine ...Read more
Author:Lysko, Albert ADate:Jun 2009The paper introduces a method to cover several wire segments with a single basis function, describes related practical algorithms, and gives some results. The process involves three steps: identifying chains of wire segments, splitting the ...Read more
Author:Joubert, SV; Fedotov, I; Pretorius, W; Shatalov, MYDate:May 2007“Bryan’s effect" - that is, the effect of a vibrating pattern’s precession in the direction of inertial rotation of a vibrating ring - was discovered by G. Bryan in 1890. This effect has several applications in navigational instruments, such ...Read more
Author:Shatalov, M; Fedotov, IDate:Aug 2007In this paper the authors present a new method of numerical evaluation of unknown coefficients of a dynamical system having available information about unknown phase trajectories at some time values. The method consists in the direct integration ...Read more
Author:Namoshe, M; Tlale, NS; Kumile, CMDate:Jul 2008Open source software simulators play a major role in robotics design and research as platforms for developing, testing and improving architectures, concepts and algorithms for cooperative/multi-robot systems. Simulation environment enables ...Read more
Author:Berglund, Martin; Drewes, F; Van der Merwe, BDate:Aug 2018Modern regular expression matching software features many extensions, some general while some are very narrowly specified. Here we consider the generalization of adding a class of operators which can be described by, e.g. finite-state ...Read more
Author:Rens, G; Meyer, T; Casini, GDate:Aug 2016We propose a method for an agent to revise its incomplete probabilistic beliefs when a new piece of propositional information is observed. In this work, an agent’s beliefs are represented by a set of probabilistic formulae – a belief base. ...Read more
Author:Butgereit, L; Martinus, Laura JBDate:Aug 2018Tourism is a major contributor to employment in southern Africa and a major contributor to gross domestic products of many southern African countries. One of the major tourist attractions in many southern African countries is the wild animals. ...Read more
Author:Rens, GDate:Apr 2016I propose a framework for an agent to change its probabilistic beliefs when a new piece of propositional information a is observed. Traditionally, belief change occurs by either a revision process or by an update process, depending on whether ...Read more
Author:Gololo, KV; Majozi, TDate:Jan 2011Cooling water systems are generally designed with a set of heat exchangers arranged in parallel. This arrangement results in higher cooling water flow rate and low cooling water return temperature, thus reducing cooling tower efficiency. ...Read more
Author:Majozi, T; Price, TDate:Aug 2010The traditional steam system comprises a steam boiler and the associated heat exchanger network (HEN). Most research published in literature tends to address both the elements of the steam system as separate entities instead of analyzing, ...Read more
Author:Price, T; Majozi, TDate:Aug 2010Heat exchanger networks in steam systems are traditionally designed to operate in parallel. Coetzee and Majozi (Ind. Eng. Chem. Res. 2008, 47, 4405-4413) found that by reusing steam condensate within the network the steam flow rate could be ...Read more
Author:Boesack, CD; Marwala, T; Nelwamondo, Fulufhelo VDate:Mar 2012Automatic Generation Control (AGC) of large interconnected power systems are typically controlled by a PI or PID type control law. Recently intelligent control techniques such as GA-Fuzzy controllers have been widely applied within the power ...Read more
Author:Beraki, Asmerom F; Landman, WA; DeWitt, DDate:Nov 2015The study compares one- and two-tiered forecasting systems as represented by the South African Weather Service Coupled Model and its atmosphere-only version. In this comparative framework, the main difference between these global climate ...Read more
Author:Chutter, FMDate:Dec 1968There is a large population of Simulium chutteri lewis in the Vaal river at and below the village of Warrenton in the north-east of the Cape Province, South Africa. The female of this species attacks man, cattle and horses and had become a ...Read more
Author:Cilliers, Jacques E; Smit, JCDate:Oct 2007In [1] the authors introduced a technique for generating mismatched pulse compression filters for linear frequency chirp signals. The technique minimizes the sum of the pulse compression sidelobes in a p L –norm sense. It was shown that ...Read more
Author:Booth, R; Casini, G; Meyer, T; Varzinczak, IDate:Jul 2015Propositional Typicality Logic (PTL) is a recently proposed logic, obtained by enriching classical propositional logic with a typicality operator. In spite of the non-monotonic features introduced by the semantics adopted for the typicality ...Read more
Author:Cooper, Antony K; Coetzee, SerenaDate:Apr 2020Publicly-available mobile data can be used to derive fine grain commuting and travel patterns. These types of data include geocoded or geotagged discrete units of communication: messages, posts, tweets, status updates, check-ins, images and ...Read more
Author:Mcnamara, DA; Botha, LDate:Nov 1993The radiation properties of individual folded dipole antennas mounted at various radial distances from the centre of conducting masts of different diameters are described in compact fashion.Read more