Open Access Repositories: Recent submissions

Now showing items 1461-1480 of 4204

  • A two-zone model for natural cross-ventilation 

    Carrilho da Graça, G; Daish, Nicholas Charles; Linden, Paul Frederick (ElsevierBuilding and Environment, 2015-07-01)
    Cross-ventilation flows (CV) are characterized by significant inflow momentum conservation as fluid flows across an enclosed rectangular volume as a confined jet. When the inflow area is smaller than the volume cross-sectional ...

  • Automatic Program Repair with Condition Synthesis and Compound Mutations 

    Unknown author (2015-02-12)
    We present PCR, a new automatic patch generation system. PCR uses a new condition synthesis technique to efficiently discover logical expressions that generate desired control- flow transfer patterns. Presented with a set ...

  • An Analysis of Patch Plausibility and Correctness for Generate-And-Validate Patch Generation Systems 

    Unknown author (2015-02-10)
    We analyze reported patches for three prior generate-and-validate patch generation systems (GenProg, RSRepair, and AE). Because of experimental error, the majority of the reported patches violate the basic principle behind ...

  • Evaluation of a multiprogramming time sharing system through simulation. 

    Kissemlis, Demetrios Nik (University of Cape TownFaculty of ScienceDepartment of Computer Science, 1975)
    The thesis describes the design and implementation of a simulation model. The model is patterned after the EXEC-8 multiprogramming time sharing operating system on the UNIVAC 1106 computer at the computer centre of the ...

  • Gromov-Hausdorff Collapsing of Calabi-Yau manifolds 

    Gross, Mark William; Tosatti, Valentino; Zhang, Yuguang (International PressCommunications in Analysis and Geometry, 2016-06-08)
    This paper is a sequel to Collapsing of Abelian Fibered Calabi-Yau Manifolds [12]. We further study Gromov–Hausdorff collapsing limits of Ricci-flat Kähler metrics on abelian fibered Calabi–Yau manifolds. Firstly, we show ...

  • The effects of network factors on the performance of 3G UMTS applications 

    Jacobs, Fabian Mark (University of Cape TownFaculty of ScienceDepartment of Computer Science, 2010)
    3G is the wireless network technology expected to allow wireless applications to perform on par with wired applications. However 3G has factors which limit its performance. These factors include both device factors such ...

  • An Analysis of Patch Plausibility and Correctness for Generate-And-Validate Patch Generation Systems (Supplementary Material) 

    Unknown author (2015-02-02)
    We analyze reported patches for three prior generate-and-validate patch generation systems (GenProg, RSRepair, and AE). Because of experimental error, the majority of the reported patches violate the basic principle behind ...

  • Improved Caching Strategies for Publish/Subscribe Internet Networking 

    Unknown author (2015-01-31)
    The systemic structure of TCP/IP is outdated; a new scheme for data transportation is needed in order to make the internet more adaptive to modern demands of mobility, information-driven demand, ever-increasing quantity ...

  • Electronic text processing in the large South African life assurance companies 

    Marais, Stephanus Johannes (University of Cape TownFaculty of ScienceDepartment of Computer Science, 1981)
    The use of computer technology and magnetic storage media for production typing led to a new term "word processing". In this research word processing is considered to be part only of a more comprehensive concept - electronic ...

  • Efficiently Solving Repeated Integer Linear Programming Problems by Learning Solutions of Similar Linear Programming Problems using Boosting Trees 

    Unknown author (2015-01-21)
    It is challenging to obtain online solutions of large-scale integer linear programming (ILP) problems that occur frequently in slightly different forms during planning for autonomous systems. We refer to such ILP problems ...

  • Resonances in coupled πK, ηK scattering from lattice QCD 

    Wilson, David John; Dudek, Jozef J; Edwards, Robert G; Thomas, Christopher Edward (APSPhysical Review D, 2015-03-10)
    Coupled-channel πK and ηK scattering amplitudes are determined by studying the finite-volume energy spectra obtained from dynamical lattice QCD calculations. Using a large basis of interpolating operators, including both ...

  • Resolving the hydration of hexacyclic systems using ultrasonic interferometry and computer simulations 

    Boscaino, Annalisa (University of Cape TownFaculty of ScienceDepartment of Computer Science, 2010)
    The major part of this thesis focuses on investigating dynamic hydration behaviour of a series of hexacycylic molecules in water, by using computational techniques validated through ultrasound interferometry experiments. ...

  • A Numerical Technique for Linear Elliptic PDEs in Polygonal Domains 

    Hashemzadeh, Parham; Fokas, Athanassios Spyridon; Smitheman, SA (Royal Society PublishingProceedings of the Royal Society A, 2015-02-11)
    Integral representations for the solution of linear elliptic partial differential equations (PDEs) can be obtained using Green's theorem. However, these representations involve both the Dirichlet and the Neumann values on ...

  • Meta-standardisation of interoperability protocols 

    Paihama, Jorgina Kaumbe do Rosario (University of Cape TownFaculty of ScienceDepartment of Computer Science, 2012)
    The current medley of interoperability protocols is potentially problematic. Each protocol is designed by a different group, each provides a single service, and has its own syntax and vocabulary. Popular protocols such as ...

  • An architecture for secure searchable cloud storage 

    Koletka, Robert (University of Cape TownFaculty of ScienceDepartment of Computer Science, 2012)
    Cloud Computing is a relatively new and appealing concept; however, users may not fully trust Cloud Providers with their data and can be reluctant to store their files on Cloud Storage Services. The problem is that Cloud ...

  • The design of a mobile user interface for an interest rate calculator 

    Swanepoel, Arie Willem (University of Cape TownFaculty of ScienceDepartment of Computer Science, 2012)
    In our search towards an interactive mobile fixed rate calculator, in this dissertation, we are interested in the human-centred design and in particularly exploring the mobile user interface design and the user experience ...

  • Expert system adjudication of hospital data in HIV disease management 

    Joseph, Asma (University of Cape TownFaculty of ScienceDepartment of Computer Science, 2012)
    HIV Disease Management Programs (DMP's) are comprehensive programs that are designed to manage the HIV infected patient's treatment in an integrated manner.

  • Usable authentication for mobile banking 

    Chong, Ming Ki (University of Cape TownFaculty of ScienceDepartment of Computer Science, 2009)
    This dissertation describes the design of two mobile authentication techniques: combinational graphical passwords and gesture passwords. These systems were implemented as prototypes. The prototypes along with a PIN ...

  • Managing economic value and uncertainty on software projects : an empirical study with the CASSE framework 

    Balikuddembe, Joseph Kibombo (University of Cape TownFaculty of ScienceDepartment of Computer Science, 2009)
    Lack of adaptive-predictor models in software development renders the decision-making process complex, principally when evaluating investment options. Prior work has presented various approaches which are still non-integrated, ...

  • Freeze fracturing of elastic porous media: a mathematical model 

    Vlahou, I; Worster, Michael Grae (Royal Society, 2015-02-11)
    We present a mathematical model of the fracturing of water-saturated rocks and other porous materials in cold climates. Ice growing inside porous rocks causes large pressures to develop that can significantly damage the ...