Prof. William Tucker

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https://hdl.handle.net/10566/1723

Position: Associate Professor Department: Computer Science Faculty: Faculty of Natural Science Qualifications: BA (Trinity University, USA), MS (Arizona State University, USA), PhD (UCT) Research publications in this repository ORICD iD 0000-0001-8636-7281 More about me: here, here and here Tel: 021 959 2516 Fax: 021 959 1274 Email: btucker@uwc.ac.za

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Preparation of Deaf end-users and the softbridge for semi-automated relay trials
(Telkom, 2004) Glaser, Meryl; Tucker, William David; Mashao, Daniel
Following on the development of several prototypes, we have built a semi-automated Deaf Telephony prototype on the SoftBridge platform. This prototype relays text and speech between Deaf users on the Internet and hearing users on the telephone system. Previous work with a pilot trial in the laboratory revealed several opportunities for enhancement. We added a Wizard of Oz (WoOz) to replace the poorly performing automatic speech recognition functionality as well as H.323 breakout, more extensive logging and advanced call initiation functionality. In order to trial the current prototype, we initiated an Information and Communication Technology (ICT) training programme with the Deaf Community of Cape Town. Twenty Deaf users participated in the training. In addition to the training, much baseline user data was collected to give an indication of how Deaf users communicate with hearing users as well as how familiar they are with ICT devices and services. The work for the rest of this year requires us to recruit and train a WoOz operator. Subsequent trials will essentially consist of monthly cycles of prototype introduction, training, automated metric and log collection, user feedback and then feature enhancement. Linguistic analyses of the text output of the Deaf users will be analyzed. We hope to refine the SoftBridge prototype to fit the needs of the Deaf and hearing users, from both technical and social viewpoints. We expect that these iterative cycles will continue for some time and will teach us many lessons regarding multi-modal semi-synchronous IP-based communications systems.
The role of Outcome Mapping in developing a rural telemedicine system
(International Information Management Corporation, 2008) Tucker, William David; Blake, Edwin H.
We describe the use of Outcome Mapping to guide the design of a rural telemedicine consultation system in South Africa. While Outcome Mapping was not primarily intended to guide design, we show that it tied in well with a cyclical participatory design method for an Information and Communication Technology for Development project.
Socially aware software engineering for the developing world
(IIMC International Information Management Corporation, 2006) Blake, Edwin H.; Tucker, William David
While the social effects of Information Technology (IT) have received much attention there is very little work on targeted methodologies to develop IT applications and content in a developing world environment. This paper describes a methodology called Socially Aware Software Engineering we are busy formulating based on firsthand experience building Information and Communication Technology solutions. Our method is based on a classical user-centred approach from Human Computer Interaction combined with aspects of Participatory Design and cyclical software engineering practises. These approaches are wrapped into an iterative Action Research paradigm in order to directly include the community-based users of our systems. We outline three cases studies based on our evolving method. The paper concludes with suggestions on changing the nature of tertiary curricula in developing countries in a way that integrates this socially aware software engineering methodology.
SoftBridge in action: the first Deaf telephony pilot
(Telkom, 2003) Tucker, William David; Glaser, Meryl; Lewis, John
Following on several partial prototypes, we built an automated Deaf Telephony bridging application with the SoftBridge platform. The SoftBridge performs multi-modal bridging in real-time using Text-to-Speech (TTS) and Automatic Speech Recognition (ASR) utilities accessed via web services. To perform Action Research with the Deaf community in Cape Town, we invited a Deaf user (DU) to participate in a pilot study. We conducted three tests varying the input/output modalities of the hearing user (HU). The DU had a standard text in/text out Instant Messaging client. The HU client used the following specific modality combinations: Text & TTS in/Text out, TTS in/Text out and TTS in/Text & ASR out. The SoftBridge logged the conversations for subsequent analysis. The trial showed a largely successful conversation. Success factors include a) a text and computer literate DU who is familiar with research practise, b) using the system to explain the research as we conducted it and c) that the multi-modal bridging capabilities overcame the expected shortcomings of TTS and especially ASR. The lessons learned from this trial will be applied to the next trial once the necessary modifications have been implemented.
Telecommunications bridging between deaf and hearing users in South Africa
(2004) Glaser, Meryl; Tucker, William David
This paper presents a description of telecommunications for Deaf people in South Africa by contrasting the situation in the developed world. We explain the main motivations for providing a locally appropriate solution. Research activity began with a community-based field trial of TTYs. The recommendations of the trial motivated an innovative approach to provide synchronous and accessible relay services. Drawing from international technological developments, we designed a software solution called the SoftBridge. We employ iterative Action Research cycles to drive technological modifications to the SoftBridge and to encourage adoption by the end-user community.

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