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Browsing by Author "Kourie, DG"

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Assessing the quality of repositories of volunteered geographical information

Author: Cooper, Antony K ; Coetzee, S ; Kourie, DG Date: Oct 2012 In this paper the authors assess two repositories of volunteered geographical information (VGI) (the 2nd South African Bird Atlas Project and OpenStreetMap) against the seven commonly-used dimensions of the quality of geographical information ... Read more
An assessment of several taxonomies of volunteered geographical information

Author: Cooper, Antony K ; Coetzee, S ; Kourie, DG Date: Apr 2012 User-generated content (UGC) in general, and volunteered geographical information (VGI) in particular, are becoming more important as sources for official data bases, such as those used in national spatial data infrastructures (SDIs). Discovering ... Read more
Challenges for quality in volunteered geographical information

Author: Cooper, Antony K ; Coetzee, S ; Kaczmarek, I ; Kourie, DG ; Iwaniak, A ; Kubik, T Date: May 2011 The University of Pretoria in South Africa and the Wroclaw University of Environmental and Life Sciences in Poland have a joint research project under the SA/Poland Cooperation Agreement on Cooperation in Science and Technologies, entitled ... Read more
Comparing the Performance of Object Databases and ORM Tools

Author: Van Zyl, P ; Kourie, DG ; Boake, A Date: Oct 2006 The currently popular distributed, n-tiered, object-oriented application architecture provokes many design debates. Designs of such applications are often divided into logical ‘tiers’ – usually user interface, business logic and domain object, ... Read more
Extending backward polygon beam tracing to glossy scattering surfaces

Author: Duvenhage, B ; Bouatouch, K ; Kourie, DG Date: May 2011 Backward polygon beam tracing methods, that is beam tracing from the light source (L), are well suited to gather path coherency from specular (S) scattering surfaces. These methods are useful for modelling and efficiently simulating caustics ... Read more
Formal characterizations of FA-based string processors

Author: Ngassam, EK ; Watson, BW ; Kourie, DG Date: Aug 2010 With this poster, the authors on the denotational semantics of algorithms to suggest an abstraction of a string recognizer. The abstraction provides a unified formalism for representing FA-based string recognizers as an instance of a parameterized ... Read more
Framework for benchmarking FA-based string recognizers

Author: Ngassam, EK ; Kourie, DG ; Watson, BW Date: Oct 2010 Previous work on implementations of FA-based string recognizers suggested a range of implementation strategies (and therefore, algorithms) aiming at improving their performance for fast string recognition. However, an efficient exploitation ... Read more
Layered distributed simulation architecture to support the C2 enterprise

Author: Duvenhage, A ; Kourie, DG ; Hancke, GP Date: Sep 2009 Modelling and simulation can be applied to support Joint Command and Control (JC2) which involves the interoperability of network-centric systems as well as legacy command and control systems. It is assumed that software will always be the ... Read more
Light beam tracing for multi-bounce specular and glossy transport paths

Author: Duvenhage, B ; Bouatouch, K ; Kourie, DG Date: Sep 2014 This paper describes a new extension to light beam tracing that includes glossy multi-bounce transport paths for more realistic rendering of caustics. A spherical Gaussian approximation of the glossy scatter distribution as well as Gauss' ... Read more
Migrating to a real-time distributed parallel simulator architecture

Author: Duvenhage, B ; Kourie, DG Date: Jul 2007 A legacy non-distributed logical time simulator is migrated to a distributed architecture to parallelise execution. The existing Discrete Time System Specification (DTSS) modelling formalism is retained to simplify the reuse of existing models. ... Read more
Perceptions of virtual globes, volunteered geographical information and spatial data infrastructures

Author: Cooper, Antony K ; Coetzee, S ; Kourie, DG Date: 2010 The Internet has spawned the development of virtual communities or virtual social networks which generate and share information with one another, and with the public at large. Voluntereerd geographical information (VGI) refers to user-generated ... Read more
Thoughts on exploiting instability in lattices for assessing the discrimination adequacy of a taxonomy

Author: Cooper, Antony K ; Kourie, DG ; Coetzee, S Date: Oct 2010 Conventionally in formal concept analysis (FCA), concept stability is preferred in the lattice, because instability (i.e. low stability) represents noise that clouds the analysis of the data. However, high concept stability means that there ... Read more
Volunteered geographical information, crowdsourcing, citizen science and neogeography are not the same

Author: Cooper, Antony K ; Coetzee, S ; Kourie, DG Date: 2018 The terms user-generated content, volunteered geographical information, crowdsourcing, citizen science and neogeography are elucidated. The purpose is to expose the range of meanings associated with these terms, and to promote consensus as ... Read more

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Browsing by Author "Kourie, DG"

Browsing by Author "Kourie, DG"

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