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Physical Sciences and Mathematics Commons™
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Full-Text Articles in Physical Sciences and Mathematics
Using Task Analysis To Design Intuitive Online Grocery Systems, Mark Freeman, Alison Freeman
Using Task Analysis To Design Intuitive Online Grocery Systems, Mark Freeman, Alison Freeman
Faculty of Informatics - Papers (Archive)
This paper presents a normative task model for modelling user interactions with online grocery stores. It is envisaged that using task models will aid system developers in building better systems to meet users’ needs, and hereby creating better system design processes. This paper will discuss the three main areas of user experience when completing the process of adding a product to an online trolley: attempting to retrieve the product, receiving the results of the retrieval attempt, and adding the product to the trolley. The normative task model presented is expected to help in the future design of online grocery systems …
Information Retrieval And Social Tagging For Digital Libraries Using Formal Concept Analysis, Peter W. Eklund, Peter Goodall, Timothy Wray
Information Retrieval And Social Tagging For Digital Libraries Using Formal Concept Analysis, Peter W. Eklund, Peter Goodall, Timothy Wray
Faculty of Informatics - Papers (Archive)
This paper reports a novel semantic web application developed to deliver a collaborative tagging system for a digital on-line museum. The key features of our application – called the Virtual Museum of the Pacific – concern the browsing and retrieval interface based on Formal Concept Analysis, the extensible distributed data model to support collaborative tagging and its web services implementation.
On The Analysis Of Background Subtraction Techniques Using Gaussian Mixture Models, Abdesselam Bouzerdoum, Azeddine Beghdadi, Son Lam Phung, Philippe L. Bouttefroy
On The Analysis Of Background Subtraction Techniques Using Gaussian Mixture Models, Abdesselam Bouzerdoum, Azeddine Beghdadi, Son Lam Phung, Philippe L. Bouttefroy
Faculty of Informatics - Papers (Archive)
In this paper, we conduct an investigation into background subtraction techniques using Gaussian Mixture Models (GMM) in the presence of large illumination changes and background variations. We show that the techniques used to date suffer from the trade-off imposed by the use of a common learning rate to update both the mean and variance of the component densities, which leads to a degeneracy of the variance and creates “saturated pixels”. To address this problem, we propose a simple yet effective technique that differentiates between the two learning rates, and imposes a constraint on the variance so as to avoid the …
Social Tagging For Digital Libraries Using Formal Concept Analysis, Timothy Wray, Peter W. Eklund
Social Tagging For Digital Libraries Using Formal Concept Analysis, Timothy Wray, Peter W. Eklund
Faculty of Informatics - Papers (Archive)
This paper describes the Art Collection Ecosystem – an application that allows users to tag and serendipitously browse content using Formal Concept Analysis. Within this application, tags are derived from meta-data of artworks within an existing asset management system and are classified according to theories derived from social tagging behaviour.We present past and recent iterations of its design, where it is evaluated as a contextual comparison to a popular image tagging application, Flickr. Through the process of iterative design and user evaluation, we produce results are of interest to any applied research and development that involves the exploration of digital …