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Browsing by Author "Johnson, D"

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  • Johnson, D; Roux, K (Association for Computing Machinery, 2008-09)
    Providing connectivity to under-serviced rural areas comes with a unique set of challenges such as the high cost of installing equipment, lack of reliable power, skill shortages and high cost of providing Internet connectivity ...
  • Phokeer, A; Johnson, D; Densmore, M (2016-09)
    The paper describes a measurement study of mobile Internet usage in township communities in South Africa. The idea is to understand usage pattern of mobile data that would motivate the provisioning of a localised cloudlet ...
  • Takyi, A; Densmore, M; Johnson, D (2016-09)
    Collaborative sensing among secondary users in television white space (cognitive radio) networks can considerably increase the probability of detecting primary or secondary users. In current collaborative sensing schemes, ...
  • Johnson, D; Kaka, Y; Hay, J (2006-09)
    To profile the performance of an ad-hoc networking protocol, three possible methods can be applied. The first is to develop a mathematical model for the expected performance, the second is to run a series of computer ...
  • Lysko, AA; Johnson, D (WSEAS International Conference on Applied Electromagnetics, Wireless and Optical Communications (ELECTROSCIENCE '08), 2008-07)
    The present layout of the indoor wireless mesh network test-bed build at the Meraka Institute is introduced. This is followed by a description of a numerical electromagnetic model for the complete test-bed, including the ...
  • Johnson, D; Lysko, AA (2007-09)
    Predicting the performance of ad-hoc networking protocols has typically been performed by making use of software based simulation tools. Experimental study and validation of such predictions is vital to obtaining more ...
  • Mudenda, C; Johnson, D; Parks, L; Van Stam, G (ACADEMIA, 2013-11)
    This paper provides insights on the nature of electricity supply in the rural village Macha, Zambia. It reports on case study research. Use of Information and Communication Technologies and access to e-services are constrained ...
  • Maliwatu, R; Zlobinsky, Natasha; Densmore, M; Johnson, D (2016-09)
    Dynamic Spectrum Access (DSA) provides a new opportunity for last-mile and rural connectivity. However, the nature of DSA and varying environmental conditions means that desired spectrum is not always available. To that ...
  • Johnson, D; Ntlatlapa, N; Aichele, C (2008-10)
    Development and performance analysis of ad hoc networking protocols has typically been performed by making use of software based simulation tools. However when running a routing protocol such as OLSR in large mesh network ...
  • Henry, G; Johnson, D; Ilgner, H; Letlotla, S (SBS Conferences, 2011-08)
    This presentation looks at the way rocks break and the geological and geophysical aspects thereof. It it important to know that rocks are much weaker under tension (10 times) than under compression. Geological and geophysical ...
  • Hadzic, S; Phokeer, A; Johnson, D (IEEE, 2016-10)
    This paper describes a network architecture to provide low cost last mile access and cloud services for local content sharing in a poorly resourced township environment. We describe how ICT solutions are developed in close ...
  • Johnson, D; Pejovic, V; Belding, E; Van Stam, G (Association for Computing Machinery (ACM), 2011-03)
    While Internet connectivity has reached a significant part of the world’s population, those living in rural areas of the developing world are still largely disconnected. Recent efforts have provided Internet connectivity ...
  • Masonta, MT; Johnson, D; Mzyece, M (Springer, 2011-11)
    The global migration of television (TV) from analogue to digital broadcasting will result in more spectrum bands (known as TV white space), previously used in analogue broadcasting, becoming available and unoccupied. A ...