DOLPHIN: the design and initial evaluation of multimodal focus and context

In this paper we describe a new focus and context visualisation technique called multimodal focus and context. This technique uses a hybrid visual and spatialised audio display space to overcome the limited visual displays of mobile devices. We demonstrate this technique by applying it to maps of theme parks. We present the results of an experiment comparing multimodal focus and context to a purely visual display technique. The results showed that neither system was significantly better than the other. We believe that this is due to issues involving the perception of multiple structured audio sources

Analysis of Information Visualization Techniques for Abstract data on Mobile Devices

To perform visualization on mobile devices different types of data may use like text, picture, maps, physical objects, abstract data etc. According to data visualization is categorized in two areas of visualization that is, scientific visualization and information visualization. Scientific visualization refers to some specific type of data like physical data and it is used for computer modeling and simulation. Information visualization refers to abstract data and used in business and finance, administration, digital media and other abstract concepts. The physical and abstract data is only one classification but there are others classification like static and dynamic data, structured and unstructured data, or hierarchical and non-hierarchical data classification. This paper is focus on information visualization of abstract data on mobile devices

Web accessibility diagnosis, improvement and maintenance

Context: This thesis examines how organisations create and maintain their web pages with particular focus on ensuring pages are accessible. It also investigates the potential for using a Tree-Map based tool to support such web maintenance and process improvement. Novel process improvement recommendations are given and an adaptation of a class web publishing model is presented. Methods: To supplement a review of current literature, 20 accessibility specialists and 79 large organisations were surveyed. This identified web accessibility best practices and whether these practices were implemented in the reality. A subsequent assessment of the accessibility of each organisation's web site tested if certain activities could be linked with better accessibility. Finally, a controlled experiment tested the accuracy and efficiency of a Tree-map based tool for web maintenance. Results: The survey results suggested a wide variety of web accessibility awareness amongst web developers and accessibility specialists. Best practice appeared to be implemented by many organisations with the exception of training provision. It was found that when the best practices aimed specifically at web accessibility were implemented there was a significant improvement in web accessibility. The Tree-Map based tool was proved to be more efficient than and as accurate as report based tool for web maintenance activities. Conclusions of the study: Web accessibility awareness is now reasonably high amongst web developers but the extent to which it is addressed varies. Organisations which take a systematic and mature approach to accessibility have more accessible web sites. As such, accessibility should be integrated into web publishing. Better tools are also required to facilitate this systematic integratio

Redefining the Focus and Context of Focus+Context Visualizations

The increasing diversity of computers, especially among small mobile devices such as mobile phones and PDAs, raise new questions about information visualization techniques developed for the desktop computer. Using a series of examples ranging from applications for ordinary desktop displays to webbrowsers and other applications for PDAs, we describe how a focus+context technique, Flip Zooming, is changed due to the situation it is used in. Based on these examples, we discuss how the use of "focus" and "context" in focus+context techniques change in order to fit new areas of use for information visualization. By doing so, we hope to enrich the understanding of how focus+context techniques as a whole may be further developed