• Decomposing the hypercube Qn into n isomorphic edge-disjoint trees 

      Wagner, Stephan; Wild, Marcel (Elsevier, 2012-02)
      The problem of finding edge-disjoint trees in a hypercube arises for example in the context of parallel computing [3]. Independently of applications it is of high aesthetic appeal. The hypercube of dimension n, denoted ...
    • Detecting individual sites subject to episodic diversifying selection 

      Murrell, Ben; Wertheim, Joel O.; Moola, Sasha; Weighill, Thomas; Scheffler, Konrad; Pond, Sergei L. Kosakovsky (Public Library of Science, 2012-07-02)
      The imprint of natural selection on protein coding genes is often difficult to identify because selection is frequently transient or episodic, i.e. it affects only a subset of lineages. Existing computational techniques, ...
    • The development of a spatio-temporal model for water hyacinth biological control strategies 

      Van Schalkwyk, Helene; Potgieter, Linke; Hui, Cang (University of Georgia, 2016)
      A reaction-diffusion model for a temporally variable and spatially heterogeneous environment is developed to mathematically describe the spatial dynamics of water hyacinth and the interacting populations of the various ...
    • Effects of agricultural intensification on ability of natural enemies to control aphids 

      Zhao, Zi-Hua; Hui, Cang; He, Da-Han; Li, Bai-Lian (Springer Nature, 2015-01-26)
      Agricultural intensification through increasing fertilization input and cropland expansion has caused rapid loss of semi-natural habitats and the subsequent loss of natural enemies of agricultural pests. It is however extremely ...
    • Entropy generation in a couple stress fluid flow through a vertical channel filled with saturated porous media 

      Makinde, Oluwole Daniel; Eegunjobi, Adetayo Samuel (MDPI, 2013-10-25)
      The present work investigates numerically the inherent irreversibility in a steady flow of a couple stress fluid through a vertical channel packed with saturated porous substances. The First and Second Laws of Thermodynamics ...
    • Francis Guthrie : a colourful life 

      Maritz, Pieter; Mouton, Sonja (Springer, 2012-09)
      In 1852, in London, Francis Guthrie posed the question of colouring a map with four colours only, the question that eventually became known as the Four Colour Problem. The problem is famous, but what else do we know of ...
    • Frequent toggling between alternative amino acids Is driven by selection in HIV-1 

      Delport, Wayne; Scheffler, Konrad; Seoighe, Cathal (Public Library of Science, 2008)
      Host immune responses against infectious pathogens exert strong selective pressures favouring the emergence of escape mutations that prevent immune recognition. Escape mutations within or flanking functionally conserved ...
    • A general method for parameter estimation in light-response models 

      Chen, Lei; Li, Zhong-Bin; Hui, Cang; Cheng, Xiaofei; Li, Bai-Lian; Shi, Pei-Jian (Springer Nature, 2016)
      Selecting appropriate initial values is critical for parameter estimation in nonlinear photosynthetic light response models. Failed convergence often occurs due to wrongly selected initial values when using currently ...
    • A geometrical model for testing bilateral symmetry of bamboo leaf with a simplified Gielis equation 

      Lin, Shuyan; Zhang, Li; Reddy, Gadi V. P.; Hui, Cang; Gielis, Johan; Ding, Yulong; Shi, Peijian (Wiley Open Access, 2016)
      The size and shape of plant leaves change with growth, and an accurate description of leaf shape is crucial for describing plant morphogenesis and development. Bilateral symmetry, which has been widely observed but poorly ...
    • The geometry of unitary 2-representations of finite groups and their 2-characters 

      Bartlett, Bruce (Springer Link, 2011-02)
      Motivated by topological quantum field theory, we investigate the geometric aspects of unitary 2-representations of finite groups on 2-Hilbert spaces, and their 2-characters. We show how the basic ideas of geometric ...
    • Global stability analysis and control of leptospirosis 

      Okosun, Kazeem Oare; Mukamuri, M.; Makinde, Daniel Oluwole (De Gruyter Open, 2016)
      The aim of this paper is to investigate the effectiveness and cost-effectiveness of leptospirosis control measures, preventive vaccination and treatment of infective humans that may curtail the disease transmission. ...
    • Handling uncertainty in a court of law 

      Muller, M. A. (Stellenbosch Law Review : Juta Law, 2012)
      The ability to analyse uncertainty does not reside within most people's experience. Certain fallacies frequently appear. An important example is the so-called prosecutor's fallacy. It is a specific error of logic commonly ...
    • Historic bells in Moravian Missions in South Africa's Western Cape 

      De Wet, Tertius; Teugels, Jef L.; Van Deventer, Pieta (Historical Association of South Africa, 2014-11)
      The Moravian Church was the first denomination to begin with missionary work among the indigenous people in South Africa and today the church still has a very strong presence in the country. After opening their first mission ...
    • Host-seeking efficiency can explain population dynamics of the tsetse fly Glossina morsitans morsitans in response to host density decline 

      Lord, Jennifer S.; Mthombothi, Zinhle; Lagat, Vitalis K.; Atuhaire, Fatumah; Hargrove, John W. (Public Library of Science, 2017)
      Females of all blood-feeding arthropod vectors must find and feed on a host in order to produce offspring. For tsetse—vectors of the trypanosomes that cause human and animal African trypanosomiasis—the problem is more ...
    • The impact of land abandonment on species richness and abundance in the Mediterranean Basin : a meta-analysis 

      Plieninger, Tobias; Hui, Cang; Gaertner, Mirijam; Huntsinger, Lynn (PLoS, 2014-05-27)
      Land abandonment is common in the Mediterranean Basin, a global biodiversity hotspot, but little is known about its impacts on biodiversity. To upscale existing case-study insights to the Pan-Mediterranean level, we conducted ...
    • Invading a mutualistic network : to be or not to be similar 

      Minoarivelo, Henintsoa Onivola; Hui, Cang (Wiley Open Access, 2016)
      Biological invasion remains a major threat to biodiversity in general and a disruptor to mutualistic interactions in particular. While a number of empirical studies have directly explored the role of invasion in mutualistic ...
    • Is invasion success of Australian trees mediated by their native biogeography, phylogenetic history, or both? 

      Miller, Joseph T.; Hui, Cang; Thornhil, Andrew H.; Gallien, Laure; Le Roux, Johannes J.; Richardson, David M. (Oxford University Press on behalf of the Annals of Botany Company, 2017)
      For a plant species to become invasive it has to progress along the introduction-naturalization-invasion (INI) continuum which reflects the joint direction of niche breadth. Identification of traits that correlate with and ...
    • Left ventricular segmentation from MRI datasets with edge modelling conditional random fields 

      Dreijer, Janto F.; Herbst, Ben M.; Du Preez, Johan A. (BioMed Central, 2013-07)
      Background: This paper considers automatic segmentation of the left cardiac ventricle in short axis magnetic resonance images. Various aspects, such as the presence of papillary muscles near the endocardium border, makes ...
    • Model checking rational agents 

      Bordini, Rafael H.; Fisher, Michael; Wooldridge, Michael; Visser, Willem (IEEE - -Institute of Electrical and Electronics Engineers, 2004-10)
      Agent-oriented programming techniques seem appropriate for developing systems that operate in complex, dynamic, and unpredictable environments. We aim to address this requirement by developing model-checking techniques for ...
    • Modeling HIV-1 drug resistance as episodic directional selection 

      Murrell, Ben; De Oliveira, Tulio; Seebregts, Chris; Pond, Sergei L. Kosakovsky; Scheffler, Konrad (PLOS Computational Biology, 2011-05)
      The evolution of substitutions conferring drug resistance to HIV-1 is both episodic, occurring when patients are on antiretroviral therapy, and strongly directional, with site-specific resistant residues increasing in ...