Prof. William Tucker: Recent submissions

Now showing items 21-40 of 89

    • Performance Evaluation of a Wireless Network using a VoIP Traffic Generator on a Mobile Device 

      Tiemeni, Ghislaine Livie Ngangom; Venter, Isabella; Tucker, William David (ACM, 2014)
      The problem of generating different patterns of traffic to emulate real user behaviour is receiving considerable attention with the construction of new and more complex network architectures. The theoretical modelling of ...

    • SignSupport: a limited communication domain mobile aid for a Deaf patient at the pharmacy 

      Motlhabi, Michael B.; Glaser, Meryl; Tucker, William David (Telkom, 2013)
      This paper discusses a prototype for a communication aid on a mobile phone to support a Deaf1 person visiting a public hospital pharmacy. The aim is to prevent problems of non-compliance to treatment due to poor communication ...

    • 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 ...

    • 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 ...

    • Tuning a mid-range rural WiFi-based mesh network 

      Rey-Moreno, Carlos; Tucker, William David; Simo-Reigadas, Javier (ACM, 2013)
      Little is known about how mid-range, or several km, dis- tances a ect multipoint-to-multipoint links when single ra- dio nodes with omnidirectional antennas are used. In this poster, a real network with these characteristics ...

    • Unmasking community trust issues in rural field work 

      Ufitamahoro, Marie Josée; Venter, Isabella M.; Tucker, William David; Rey-Moreno, Carlos (ACM, 2013)
      The principal objective of this paper is to describe the au thor's fieldwork and research in a remote rural area of South Africa, where a Village Telco is deployed to provide Voice over Internet Protocol on a wireless mesh ...

    • Community-based solar power revenue alternative to improve sustainability of a rural wireless mesh network 

      Rey-Moreno, Carlos; Roro, Zukile; Tucker, William David; Siya, Masbulele Jay (ACM, 2013)
      Given the needs for a clean and easy way to maintain and secure powering wireless networks in rural areas and to gen- erate revenue to guarantee the sustainability of its intended goals, an innovative approach to leverage ...

    • 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 ...

    • Towards a sustainable business model for rural telephony 

      Rey-Moreno, Carlos; Roro, Zukile; Siya, Masbulele Jay; Simo-Reigadas, Javier; Bidwell, Nicola J.; Tucker, William David (Telkom, 2012)
      This paper presents the work done thus far towards designing a sustainable business model for rural telephony in the community of Mankosi, located in the Eastern Cape province of South Africa. The pillars of the model are ...

    • Security of a Mesh Potato Network in Ad Hoc Mode 

      Mauwa, H.; Tucker, William David (Telkom, 2013)
      Wireless Mesh Networks can provide low cost and reliable community-owned connectivity in developing rural areas. A rural community can use mesh networks to access a wide range of modern information and communication ...

    • Affective gesture feedback Instant Messaging on handhelds 

      Adesemowo, A. Kayode; Tucker, William David (Institute of Electrical and Electronics Engineers, Inc., 2004)
      Mobile devices and mobile networks are becoming more data-centric (evident in Japanese I-mode) even as mobile network voice Average Revenue Per User are declining, new stream of data services are required which must take ...

    • A framework and toolkit for the collection and analysis of QoS statistics for voice traffic in Next Generation Networks 

      Paulse, Tania M.; Tucker, William David (Telkom, 2000)
      The multi-service, multi-architecture nature of NGNs is so complex that the management of services, in addition to networks, emerges as a research challenge. Despite QoS limitations, VoIP (as opposed to VoATM), dominates ...

    • User interfaces for communication bridges across the digital divide 

      Blake, Edwin H.; Tucker, William David (Springer-Verlag, 2006)
      Connecting people across the Digital Divide is as much a social effort as a technological one. We are developing a community-centred approach to learn how interaction techniques can compensate for poor communication across ...

    • Please call ME.N.U.4EVER: designing for “Callback” in rural Africa 

      Bidwell, Nicola J.; Lalmas, Mounia; Marsden, Gary; Dlutu, Bongiwe; Ntlangano, Senzo; Manjingolo, Azola; Tucker, William David; Jones, Matt; Robinson, Simon; Vartiainen, Elina; Klampanos, Iraklis (Product & Systems Internationalisation, Inc, 2011)
      Designers and developers are naïve about the ways impoverished people in rural Africa innovate new uses of mobile technology to circumvent access difficulties. Here, we report on the local appropriation of an USSD ‘Callback’ ...

    • Deaf telephony: community-based co-design (case study) 

      Blake, Edwin H.; Tucker, William David; Glaser, Meryl; Freudenthal, Adinda (Wiley, 2011)
      The process of community-based co-design is one that explores various solution configurations in a multi-dimensional design space whose axes are the different dimensions of requirements and the various dimensions of designer ...

    • Browser-based sign language communication 

      Wang, Yuan Yuan; Tucker, William David (Telkom, 2010)
      This paper describes the design and evaluation of two browser-based video communication prototypes that support sign language communication between Deaf people. The research explores combinations of technologies, protocols ...

    • 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 ...

    • 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 ...

    • Situation-aware routing based on link quality for static mesh networks with mobile nodes 

      Kobo, Hlabishi Isaac; Tucker, William David; Liu, Xiao Ming (Telkom, 2011)
      Situation-aware routing seeks to improve quality of service on hybrid wireless mesh networks by making routing decisions based on the current situation of the network. BATMAN-adv is a mesh routing protocol that counts ...

    • Communicating in designing an oral repository for rural African villages 

      Reitmaier, Thomas; Bidwell, Nicola J.; Siya, Masbulele Jay; Marsden, Gary; Tucker, William David (IIMC International Information Management Corporation, 2012)
      We describe designing an asynchronous, oral repository and sharing system that we intend to suit the needs and practices of rural residents in South Africa. We aim to enable users without access to personal computers to ...