Open Access Repositories: Recent submissions
Now showing items 1381-1400 of 4204
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Estimating the location and size of retinal injections from orthogonal images of an intact retina
(BioMed CentralBMC Neuroscience, 2015-11-21)Background : To study the mapping from the retina to the brain, typically a small region of the retina is injected with a dye, which then propagates to the retina's target structures. To determine the location of the ...
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Bridging the digital divide in African post-conflict countries : a case study of the DRC cities of Kinshasa and Kananga
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2007)The digital divide is largely seen as the main problem that developing economies and societies must overcome to gain economic productivity and social welfare. In this document we state that modern western perception of the ...
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Gesture based interface for asynchronous video communication for deaf people in South Africa
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2010)The preferred method of communication amongst Deaf people is that of sign language. There are problems with the video quality when using the real-time video communication available on mobile phones. The alternative is to ...
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Imulating storyteller-audience interactions in digital storytelling: questions, exchange structures & story objects
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2012)This work revolves around the design and evaluation of digital storytelling simulating real personal storytelling. Study One was an ethnography, of real storytellers, which revealed types of narratives, dynamism and ...
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The resonant π+γ → π+π⁰ amplitude from Quantum Chromodynamics
(APSPhysical Review Letters, 2015-12-08)We present the first ab initio calculation of a radiative transition of a hadronic resonance within Quantum Chromodynamics (QCD). We compute the amplitude for ππ → πγ* , as a function of the energy of the ππ pair and the ...
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The design of an intelligent parking system using wireless sensor networks and multi-protocol label switching
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2009)The challenge of parking management has increasingly posed the need for smart solutions. Motorists in today's busy world seek the best option in locating available parking points. The need for an efficient parking system ...
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Editorial: Understanding neural organization using statistical analysis and computational modelling: from single cells to large-scale networks
(FrontiersFrontiers in Neuroanatomy, 2015-10-26)
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Dynamic Prefetching of Data Tiles for Interactive Visualization
(2015-10-19)In this paper, we present ForeCache, a general-purpose tool for exploratory browsing of large datasets. ForeCache utilizes a client-server architecture, where the user interacts with a lightweight client-side interface to ...
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The Modular Aerial Sensing System
(American Meteorological SocietyJournal of Atmospheric and Oceanic Technology, 2016-06-01)Satellite remote sensing has enabled remarkable progress in the ocean, earth, atmospheric, and environmental sciences through its ability to provide global coverage with ever-increasing spatial resolution. While exceptions ...
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Gauge Mediation in the NMSSM with a Light Singlet: Sparticles within the Reach of LHC Run II
Relatively light stops in gauge mediation models are usually made compatible with the Higgs mass of 125 GeV by introducing direct Higgs-messenger couplings. We show that such couplings are not necessary in a simple and ...
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Big Data Privacy Scenarios
(2015-10-01)This paper is the first in a series on privacy in Big Data. As an outgrowth of a series of workshops on the topic, the Big Data Privacy Working Group undertook a study of a series of use scenarios to highlight the challenges ...
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Designing a Context-Sensitive Context Detection Service for Mobile Devices
(2015-09-24)This paper describes the design, implementation, and evaluation of Amoeba, a context-sensitive context detection service for mobile devices. Amoeba exports an API that allows a client to express interest in one or more ...
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Learning in a virtual world : expanding activity theory for the design and evaluation of group praxis
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2008)This text responds to the increasing demand for frameworks to support the design and evaluation of virtual worlds which are effective in their particular learning context by developing, a meta-theoretical framework for ...
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Coupled ππ, KK̅ scattering in P-wave and the ρ resonance from lattice QCD
(APSPhysical Review D, 2015-11-02)We determine elastic and coupled-channel amplitudes for isospin-1 meson-meson scattering in P-wave, by calculating correlation functions using lattice QCD with light quark masses such that m_π = 236 MeV in a cubic volume ...
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Network Maximal Correlation
(2015-09-21)Identifying nonlinear relationships in large datasets is a daunting task particularly when the form of the nonlinearity is unknown. Here, we introduce Network Maximal Correlation (NMC) as a fundamental measure to capture ...
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An efficient parallelization of a real scientific application
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 1995)In the past decade the cost of computing has come down considerably making high-powered computing more easily affordable. As a result many institutions and organisations now have networks of high-powered workstations. Such ...
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On the stability of gravity with Dirichlet walls
(IoPClassical and Quantum Gravity, 2015-11-06)Dirichlet walls - time-like boundaries at a finite distance from the bulk on which the induced metric is held fixed - have been used to model AdS spacetimes with a finite cutoff. In the context of gauge/gravity duality, ...
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Discussion of ‘An adaptive resampling test for detecting the presence of significant predictors’ by I. W. McKeague and M. Qian
(Taylor & FrancisJournal of the American Statistical Association, 2016-01-15)We are grateful for the opportunity to discuss this new test, based on marginal screening, of a global null hypothesis in linear models. Marginal screening has become a very popular tool for reducing dimensionality in ...
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Abelian quotients of mapping class groups of highly connected manifolds
(SpringerMathematische Annalen, 2015-10-12)We compute the abelianisations of the mapping class groups of the manifolds W²ⁿ_g = g(Sⁿ × Sⁿ) for n ≥ 3 and g ≥ 5. The answer is a direct sum of two parts. The first part arises from the action of the mapping class group ...
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A Paley-like graph in characteristic two
(Journal of Combinatorics, 2016)The Paley graph is a well-known self-complementary pseudo-random graph, defined over a finite field of odd order. We describe an attempt at an analogous construction using fields of even order. Some properties of the graph ...
