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Recommender systems are increasingly being used in today’s world. Collaborative filtering, together with association rules mining are probably the most widely used methods to implement recommender systems. In this dissertation we undertake a review of past research conducted in the area of recommender systems with the focus being the use of association rule mining. We propose a novel... [Thesis or Dissertation]

Many regression schemes deliver a point estimate only, but often it is useful or even essential to quantify the uncertainty inherent in a prediction. If a conditional density estimate is available, then prediction intervals can be derived from it. In this paper we compare three techniques for computing conditional density estimates using a class probability estimator, where this estimator is...This is an author’s accepted version of an article published in Proceedings of First Asian Conference on Machine Learning, ACML 2009, Nanjing, China, November 2-4, 2009. ©2009 Springer. [Conference Item]

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The use of computers has become part of every day life. The high prevalence of computer use may lead employers to assume university graduates will have good computing skills. Such assumptions may be the reason that employers use broad terms to advertise the computing tasks required for graduate-level positions. This thesis investigates how well the expectations of employers match the... [Thesis or Dissertation]

Leachate, the liquid that leaches through solid waste in a landfill, can potentially contaminate groundwater and surface waters. Therefore, leachate management in landfills is crucial to safeguard the environment and public health. Leachate management is a growing concern in developing countries in which environmental protection has traditionally been secondary to economic progress. An example... [Thesis or Dissertation]

An exploration of CAD and animation software was recently undertaken by a group of senior students at Lincoln University to develop and refine a range of design solutions for an inner city public space in Christchurch. The studio is part of a structured sequence of digital applications in the Bachelor of Landscape Architecture at Lincoln, where students have access to the four main groups of... [Journal Article]

The users of mobile devices increasingly use networked services to address their information needs. Questions asked by mobile users are strongly influenced by contextual factors such as location, conversation and activity. We report on a diary study performed to better understand mobile information needs. Participants’ diary entries are used as a basis for discussing the geographical and... [Working or Discussion Paper]

Testing interactive systems is notoriously difficult. Not only do we need to ensure that the functionality of the developed system is correct with respect to the requirements and specifications, we also need to ensure that the user interface to the system is correct (enables a user to access the functionality correctly) and is usable. These different requirements of interactive system testing...This article has been published in the journal: Electronic Communications of the EASST. [Journal Article]

We propose two new improvements for bagging methods on evolving data streams. Recently, two new variants of Bagging were proposed: ADWIN Bagging and Adaptive-Size Hoeffding Tree (ASHT) Bagging. ASHT Bagging uses trees of different sizes, and ADWIN Bagging uses ADWIN as a change detector to decide when to discard underperforming ensemble members. We improve ADWIN Bagging using Hoeffding Adaptive...This is an author’s accepted version of an article published in the Book: ACML 2009. © 2009 Springer. [Book Item]

The purpose of this thesis was to investigate the nature of knowledge transfer among key organisations in the New Zealand (NZ) research and development (R&D) sector. From these findings, practical implications for Information and Communication Technology (ICT) support were drawn. Knowledge-intensive R&D activities have seldom been investigated from a social network perspective. As Allen...

Client honeypots are devices for detecting malicious servers on a network. They interact with potentially malicious servers and analyse the Web pages returned to assess whether these pages contain an attack. This type of attack is termed a 'drive-by-download'. Low-interaction client honeypots operate a signature-based approach to detecting known malicious code. High- interaction...

Client honeypots are devices for detecting malicious servers on a network. They interact with potentially malicious servers and analyse the Web pages returned to assess whether these pages contain an attack. This type of attack is termed a 'drive-by-download'. Low-interaction client honeypots operate a signature-based approach to detecting known malicious code. High- interaction...

In recent years, new visualisation techniques and devices, such as remote visualisation and stereoscopic displays, have been developed to help researchers. In a remote visualisation environment the user may want to see visualisation on a different device, such as a PDA or stereo device, and in different circumstances. Each device needs to be configured correctly, otherwise it may lead to an... [Thesis or Dissertation]

It has been suggested 'expert systems' might have a significant role in the future through enabling many more people to access human experts. It is, therefore, important to understand how potential users interact with these computer systems. This study investigates the effect of extension agents' attitudes towards the features and use of an example expert system for rice disease... [Thesis or Dissertation]

It has been suggested 'expert systems' might have a significant role in the future through enabling many more people to access human experts. It is, therefore, important to understand how potential users interact with these computer systems. This study investigates the effect of extension agents' attitudes towards the features and use of an example expert system for rice disease... [Thesis or Dissertation]

It has been suggested 'expert systems' might have a significant role in the future through enabling many more people to access human experts. It is, therefore, important to understand how potential users interact with these computer systems. This study investigates the effect of extension agents' attitudes towards the features and use of an example expert system for rice disease... [Thesis or Dissertation]

Over the last decade, arithmetic coding has emerged as an important compression tool. It is now the method of choice for adaptive coding on multisymbol alphabets because of its speed, low storage requirements, and effectiveness of compression. This article describes a new implementation of arithmetic coding that incorporates several improvements over a widely used earlier version by Witten,...This document is available online at ACM Transactions on Information Systems. [Journal Article]

This literature review explores the extent to which Information Technology (IT) has affected the cultures of small traditional Pacific societies, with the South Pacific region as the point of focus. The assumption is that the educational systems of Pacific nations are in the developmental stage with the associated sophisticated technological applications. The thesis asks what if any, cultural... [Thesis or Dissertation]

Over the last decade, the Intelligent Computer Tutoring Group (ICTG) has implemented many successful constraint-based Intelligent Tutoring Systems (ITSs) in a variety of instructional domains. Our tutors have proven their effectiveness not only in controlled lab studies but also in real classrooms, and some of them have been commercialized. Although constraint-based tutors seem easier to... [Journal Article]

Over the last decade, the Intelligent Computer Tutoring Group (ICTG) has implemented many successful constraint-based Intelligent Tutoring Systems (ITSs) in a variety of instructional domains. Our tutors have proven their effectiveness not only in controlled lab studies but also in real classrooms, and some of them have been commercialized. Although constraint-based tutors seem easier to... [Journal Article]

This thesis argues for an Indigenous women’s cultural construction of information technology (IT). In Aotearoa New Zealand, Māori women have established Mana Wāhine discourses, principles, theories and practices (Evans, 1994; Hutchings, 2002b, 2005; Irwin, 1990, 1992b; Jahnke, 1997b; Pihama, 2001; Smith, 1992; Te Awekotuku, 1991). Mana Wāhine is the power, legitimacy, authority and... [Thesis or Dissertation]

During 2009 there have been several minor changes to the layout of WJ Scott Education Library (WJS). This was in response to a growth in the library collection, and improvements to make the multiple call number systems more intuitive. These changes have been very successful and have highlighted several other areas that could be improved. Before undertaking a larger rearrangement of the library...

This thesis aimed to reach two principal outcomes: To develop a robust testing methodology that allowed a detailed and fair comparative analysis of the benefit, or otherwise, of 3D methods of information interrogation over alternative 2D methods; and to test the ability for a single model to have multiple user-group functionality. The research used the examples of two user-groups within the...

This paper examines the effect of the default interface language on the usage of a bilingual digital library. In 2005 the default interface language of a bilingual digital library was alternated on a monthly basis between Māori and English. A comprehensive transaction log analysis over this period reveals that not only did usage in a particular language increase when the default interface... [Conference Item]

This paper describes the building of a digital library collection of historic newspapers. The newspapers (Niupepa in Maori), which were published in New Zealand during the period 1842 to 1933, form a unique historical record of the Maori language, and of events from an historical perspective. Images of these newspapers have been converted to digital form, electronic text extracted from these,... [Working or Discussion Paper]