Browsing Prof. William Tucker by Title

Now showing items 33-52 of 89

    • Handheld fast-track feedback instant messaging 

      Adesemowo, A. Kayode; Tucker, William David (Telkom, 2003)
      As mobile devices and networks become more data-centric, text messaging requires an extension of co-presence capabilities for better interactive discussion between input/output handicapped handheld users and their free ...

    • Improving usability and correctness of a mobile tool to help a Deaf person with pharmaceutical instruction 

      Motlhabi, Michael B.; Tucker, William David; Parker, Mariam B.; Glaser, Meryl (ACM, 2013)
      The computing for development community knows how to build user interfaces using qualitative methods for text il- literate users, especially on mobile devices. However, lit- tle work has been done speci cally targeting ...

    • Information protection in video relay services 

      Henney, Andre J.; Tucker, William David (ACM, 2013)
      This work in progress paper reports on initial research into the protection of information of the individuals that make use of video relay services. Our research team has developed an application called SignSupport, to aid ...

    • Instant Messaging on handhelds: affective feedback 

      Adesemowo, A. Kayode; Tucker, William David (Telkom, 2004)
      A text only Instant Messaging (IM) built on the IETF open standard SIP/SIMPLE has been developed in line with our proposed introduction of a user-defined text Hotkey feature. These act as an on-click Affective Gesture (AG): ...

    • Instant messaging on handhelds: an affective gesture approach 

      Adesemowo, A. Kayode; Tucker, William David (SAICSIT in association with ACM, 2005)
      Text communication can be perceived as lacking in chat spontaneity, or plastic, due to medium limitations during interaction. A form of text messaging, Instant Messaging (IM), is now on the uptake, even on mobile handhelds. ...

    • An Internet paradigm approach to policy-based network management of legacy kit for VoIP services in Next Generation Networks 

      Naidoo, Vaughn; Tucker, William David (Telkom, 2000)
      With QoS available on IP-dominant NGNs, Policy-based Network Management (PBNM) is an effective mechanism for managing services as opposed to actual devices. IP is ubiquitous, and any NGN must contend with legacy devices ...

    • Internet protocol-based push to talk 

      Kobo, Hlabishi Isaac; Tucker, William David; Norman, Michael (Telkom, 2010)
      This paper discusses a way of offering voice instant messaging based on Internet Protocol using Session Initiation Protocol. The purpose of this investigation is to enhance the modern social communication amongst the people ...

    • An interoperable signaling solution between SIP and H.323 

      Jeffries, Michael; Tucker, William David (Telkom, 2001)
      The Session Initiation Protocol and H.323 dominate the Voice over IP world. These signaling protocols are responsible for call setup and call tear down by IP telephony solutions. This project analyses and discusses the ...

    • An Interoperable signaling solution for IP-based Next Generation Networks 

      Jeffries, Michael; Tucker, William David (Telkom, 2000)
      Current VoIP signaling protocols are interoperable with the PSTN SS7 via H.323-to-SS7 or SIP-to-SS7 gateways. As we move toward the Next Generation Network, the PSTN falls away and we work toward carrier-grade VoIP ...

    • An IP based multimodal semi-synchronous rural telehealth service: Adding video messaging and conferencing to MuTI 

      Vuza, Xolisa; Tucker, William David (Telkom, 2004)
      We intend adding video messaging and conferencing to Multimodal Telemedicine Intecommunicator (MuTI), a previous system that has already been in place in the target environment. This is to allow a semi-synchronous communication ...

    • Kiara: an open source SIP system to support Deaf telephony 

      Yi, Long; Tucker, William David (Telkom, 2008)
      This paper describes Kiara, an open source SIPbased communication system that provides the building blocks to enable Deaf relay services. We have implemented a prototype that provides real-time text, voice and video to a ...

    • Local ownership, exercise of ownership and moving from passive to active entitlement: a practice-led inquiry on a rural community network 

      Rey-Moreno, Carlos; Sabiescu, Amalia; Siya, Masbulele Jay; Tucker, William David (CCIRDT, 2015)
      In this paper, we aim to shed light on local ownership from a double practical and theoretical perspective, and examine its meaning as well as the factors that are bound to influence its development in community based ...

    • Making a community network legal within the South African regulatory framework 

      Rey-Moreno, Carlos; Tucker, William David; Cull, Domonic; Blom, R. (ACM, 2015)
      Community networks often operate at the fringe of legality with respect to spectrum, network infrastructure and providing services. We have been involved with such a network in a rural community, and together with them, ...

    • Mobile Communication Tools for a South African Deaf patient in a pharmacy context 

      Chininthorn, Prangnat; Glaser, Meryl; Freudenthal, Adinda; Tucker, William David (IIMC International Information Management Corporation, 2012)
      This paper presents a case for iterative community-based co-design to facilitate the emergence of an innovative mobile system to address a potentially life-threatening scenario for Deaf people in South Africa. For Deaf ...

    • A mobile Deaf-to-hearing communication aid for medical diagnosis 

      Mutemwa, Muyowa; Tucker, William David (Telkom, 2010)
      This paper describes how a deaf to hearing communication aid built for a mobile phone can be used to provide semi-synchronous communication between a Deaf person and a hearing person who cannot sign. Deaf people with access ...

    • A mobile platform traffic generator for network performance evaluation 

      Tiemeni, Ghislaine Livie Ngangom; Venter, Isabella M.; Rey-Moreno, Carlos; Tucker, William David (Telkom, 2013)
      This work in progress paper presents an overview of the development of an efficient and accurate mobile traffic generator based on an open source computer-based traffic generator software. A high performance mobile traffic ...

    • Mobile vertical handover between infrastructure and ad hoc Wi-Fi networks 

      Chitedze, Zimani; Tucker, William David (Telkom, 2011)
      This paper addresses mobility management issues in an environment with both wireless LAN and wireless mesh networks. We first examine wireless mesh network client side transparency within mesh mobility management protocols ...

    • Mobile video comparison to help Deaf people make informed choices: a South African case study with provincial data 

      Henney, Andre; Tucker, William David (IIMC International Information Management Corporation, 2018)
      Deaf people use sign language to communicate and use mobile video calling to communicate with one another. Mobile video utilises much more bandwidth than text and voice communication modes, resulting in higher expenditure ...

    • MUTI Telehealth 

      Tucker, William David; Vuza, Xolisa; Chetty, Marshini; Blake, Edwin H.; Marsden, Gary; Pearson, Murray; Westerveld, Rudi (2007)
      For four years we have been iteratively evolving MUTI, a rural telehealth system, for hospitals and clinics in a remote rural part of the Eastern Cape in South Africa (Chetty, 2005; Chetty et al., 2003, 2004a; Maunder et ...

    • Open user interconnect and quality of communication 

      Tucker, William David; Blake, Edwin H.; Marsden, Gary (Telkom, 2004)
      We looked for and found two situations within the South African Digital Divide where constant and severe macro-scale latencies would most likely interfere with the usage of Information and Communication Technology (ICT) ...