Otago University Research Archive
Browsing Computer Science by Date Published
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Browsing Computer Science by Date Published
Now showing items 1-20 of 32
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(Thesis, Master of Science, 2013)Vocabulary mismatch is an impediment to responding to user queries with relevant results. Stemmers solve this problem by conflating terms with similar spellings. In this thesis we use machine learning to create a stemmer ... -
(Thesis, Master of Science, 2012)A common problem in computer vision is to match corresponding points between images. The success of computer vision has usually relied on having good feature representations, which are usually hand-crafted and thus require ... -
(Thesis, Doctor of Philosophy, 2012)This thesis presents a study in the area of computer assisted language learning systems. The study focusses on the topic of automatic correction of student errors. In the thesis, I will describe a novel statistical model ... -
(Thesis, Doctor of Philosophy, 2012)With the development of deep belief nets, the empirical evidence supporting a link between deep architecture neural networks and generalisation with respect to classification has been mounting. An analytical proof of this ... -
(Thesis, Doctor of Philosophy, 2012)This thesis presents the design and implementation of our novel hybrid software DSM system. We call our system hybrid home-based EAC (HHEAC) since the system implements our novel exclusive access consistency model (EAC) ... -
(Thesis, Master of Science, 2012)Various researchers have used one hidden layer neural networks (weighted sums of sigmoids) to find the unknown solutions of partial differential equations. They are embedded within an energy function that describes the ... -
(Thesis, Master of Science, 2011)The automatic generation of useful hyperlinks has been a topic of interest in the field of information retrieval for several years, but no existing method for evaluating the quality of the generated hyperlinks has yet been ... -
(Thesis, Doctor of Philosophy, 2011)For most animals, locomotion is essential for survival, and it is advantageous to do this efficiently and with minimal neural control. Research has shown that efficient walking is possible without control, resulting purely ... -
(Thesis, Master of Science, 2011)Reinforcement learning (RL) problems are a fundamental part of machine learning theory, and neural networks are one of the best known and most successful general tools for solving machine learning problems. Despite this, ... -
(Thesis, Doctor of Philosophy, 2011)The Internet has already become a platform for multimedia rich communication, collaboration and entertaining applications. A majority of these applications are based on a technology known as audio-video streaming. Streaming ...
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(Thesis, Master of Science, 2011)The new user problem is a problem that all collaborative filtering systems will face. How do we make recommendations when we do not know what the user likes? This thesis provides an overview of collaborative filtering ... -
(Thesis, Doctor of Philosophy, 2010)The computer vision problem of face detection has over the years become a common high-requirements benchmark for machine learning methods. In the last decade, highly efficient face detection systems have been developed ... -
(Thesis, Master of Science, 2010)Spam has become a serious problem to email users all over the world. Most of the daily email messages we are receiving consists of unwanted spam messages. Although there are various methods to reduce the quantity of spam ... -
(Thesis, Doctor of Philosophy, 2010)When a person attends to an object, a temporary working memory representation is created for it, specific to that individual “token” object. This differs from more general accumulated memories for “types” of objects. Kahneman, ... -
(Thesis, Doctor of Philosophy, 2009)Human language is the result of both biological and cultural evolution. To have the best chance of understanding language we must seek all the constraints of that evolution. In the first part of my thesis I propose the ... -
(Thesis, Master of Science, 2009)Human infants begin to produce speech at the beginning of the second year of life. Some theories propose that language is acquired by simply recognising statistical properties in linguistic input. Other hypotheses consider ... -
(Thesis, Doctor of Philosophy, 2008)This thesis is about logical models of belief (and knowledge) representation and belief change. This means that we propose logical systems which are intended to represent how agents perceive a situation and reason about ...
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(Conference or Workshop Item (Paper), 18th Annual Colloquium of the Spatial Information Research Centre (SIRC 2006: Interactions and Spatial Processes), 2006)We present a model-based contour tracing approach to the problem of automatically segmenting a Scanning Electron Microscope image of red blood cells. These images characteristically have high numbers of overlapping cells ... -
(Thesis, Master of Arts, 2006)
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(Thesis, Master of Science, 2006)Disambiguating an utterance occurring in a dialogue context is a complex task, which requires input from many different sources of information -- some syntactic, some semantic, and some pragmatic. The central question ...
Now showing items 1-20 of 32