Open Access Repositories: Recent submissions
Now showing items 1641-1660 of 4204
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Softbridge : a socially aware framework for communication bridges over digital divides
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2009)Computer scientists must align social and technical factors for communication technologies in developing regions yet lack a framework to do so. The novel Softbridge framework comprises several components to address this ...
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Introduction to Java programming for the high school student
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2004)The objective of this project was to evaluate the effectiveness of teaching high school students the Java language utilising Java classes. These classes were designed to simplify the syntax of the language and to introduce ...
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Force-extension of the Amylose Polysaccharide
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2009)Myasthenia gravis (MG) is an autoimmune disorder in which auto-antibodies directed at the acetylcholine receptors (AChR) of the neuromuscular junction (NMJ) block, alter or destroy their targets. The anti-AChR antibodies ...
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Speech perception in virtual environments
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2005)Many virtual environments like interactive computer games, educational software or training simulations make use of speech to convey important information to the user. These applications typically present a combination of ...
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Semiotic machines : software in discourse
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2008)This study develops new theoretical and methodological approaches to the study of software as a medium of communication. This study analyses voting software, educational software, search engines, and combat and narrative ...
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A web browsing workload model for simulation
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2004)The simulation of packet switched networks depends on accurate web workload models as input for network models. We derived a workload model for traffic generated by an individual browsing the web. We derived the workload ...
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A novel interface for first person shooter games on personal digital assistant devices
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2008)The main aim of this study is to enhance the playability of games on current standard PDA devices. The newly designed interface more effectively leverages current well-established devices, which solves the problem of rapidly ...
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Modulating application behaviour for closely coupled intrusion detection
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2003)This thesis presents a security measure that is closely coupled to applications. This distinguishes it from conventional security measures which tend to operate at the infrastructure level (network, operating system or ...
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VRBridge: A constructivist approach to supporting interaction design and end-user authoring in virtual reality
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2010)For any technology to become widely-used and accepted, it must support end-user authoring and customisation. This means making the technology accessible by enabling understanding of its design issues and reducing its ...
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Using access information in the dynamic visualisation of web sites
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2004)Log file analysis provides a cost-effective means to detennine web site usage. However, current methods of displaying log analysis results tend to be limited in that they either contain no reference to a web site's structure, ...
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A Coded Shared Atomic Memory Algorithm for Message Passing Architectures
(2014-08-01)This paper considers the communication and storage costs of emulating atomic (linearizable) multi-writer multi-reader shared memory in distributed message-passing systems. The paper contains three main contributions: (1) ...
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Designing Umeli: A Case for Medsersiated Design, a participatory approach to designing interactive systems for semi-literate users
(University of Cape TownFaculty of ScienceFaculty Science: ICTC4D, 2012-10)This dissertation documents a journey into the design of Ummeli with a community of semi-‐literate job seekers in Khayelitsha, Cape Town whose primary access to the internet was through their mobile phones. Working closely ...
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Software Support for Podcasting Mobile Lecture Content for Education in Sub-Sahara African Universities
(University of Cape TownFaculty of ScienceFaculty Science: ICTC4D, 2013-11)Podcasting is fast gaining traction in developing regions as a means to augment classroom instruction. Commercial podcasting tools such as Apple’s Leopard Server, Tele-task and OpenEya, despite being successfully used in ...
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Autotuning Algorithmic Choice for Input Sensitivity
(2014-06-23)Empirical autotuning is increasingly being used in many domains to achieve optimized performance in a variety of different execution environments. A daunting challenge faced by such autotuners is input sensitivity, where ...
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Possibilistic Beliefs and Higher-Level Rationality
(2014-06-09)We consider rationality and rationalizability for normal-form games of incomplete information in which the players have possibilistic beliefs about their opponents. In this setting, we prove that the strategies compatible ...
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Possibilistic Beliefs and Higher-Level Rationality
(2014-06-09)We consider rationality and rationalizability for normal-form games of incomplete information in which the players have possibilistic beliefs about their opponents. In this setting, we prove that the strategies compatible ...
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Local varying-alpha theories
(World Scientific PublishingModern Physics Letters A, 2015-07-20)In a recent paper, we demonstrated how the simplest model for varying-alpha may be interpreted as the effect of a dielectric material, generalized to be consistent with Lorentz invariance. Unlike normal dielectrics, such ...
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Latent Case Model: A Generative Approach for Case-Based Reasoning and Prototype Classification
(2014-05-26)We present a general framework for Bayesian case-based reasoning and prototype classification and clustering -- Latent Case Model (LCM). LCM learns the most representative prototype observations of a dataset by performing ...
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Quaternionic Representation of the Riesz Pyramid for Video Magnification
(2014-04-26)Recently, we presented a new image pyramid, called the Riesz pyramid, that uses the Riesz transform to manipulate the phase in non-oriented sub-bands of an image sequence to produce real-time motion-magnified videos. In ...
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Multi-Person Motion Tracking via RF Body Reflections
(2014-04-26)Recently, we have witnessed the emergence of technologies that can localize a user and track her gestures based purely on radio reflections off the person's body. These technologies work even if the user is behind a wall ...
