Now showing items 42-61 of 542

  • Asynchronous video telephony for the Deaf 

    Ma, Zhen Yu; Tucker, William David (Telkom, 2007)
    The South African Deaf community has very limited telephony options. They prefer to communicate in sign language, a visual medium. Realtime video over Internet Protocol is a promising option, but in reality, the quality ...
  • Automatic voice relay with open source Kiara 

    Yi, Long; Tucker, William David (Telkom, 2009)
    One way for Deaf people to communicate with hearing people over the telephone is to use a voice relay. The service is often provided with a human relay operator that relays text into voice, and vice versa, on behalf of the ...
  • Bacterial morphotype grading for periodontal disease assessment 

    Smeda-Pienaar, Kim; Kaambo, Eveline; Africa, Charlene Wilma Joyce (Nature Publishing Group, 2017)
    BACKGROUND: Listgarten and Hellden (1978) used darkfield microscopy of wet mounts to differentiate between healthy and periodontally diseased sites in the mouth by expressing the different bacterial morphotypes observed ...
  • BANA-positive plaque samples are associated with oral hygiene practices and not CD4+ T cell counts in HIV-positive patients 

    John, Cathy N.; Stephen, Lawrence X.G.S.; Africa, Charlene W.J. (Hindawi Publishing Corporation, 2012)
    Background. The “red complex” microorganisms, namely, Porphyromonas gingivalis, Treponema denticola, and Tannerella forsythia are considered as potential pathogens causing HIV-associated periodontal diseases. Moreover, ...
  • Beyond traditional ethics when developing assistive technology for and with deaf people in developing regions 

    Tucker, William David (Springer, 2015)
    There are limitations to traditional ethical approaches and procedures when engaged in assistive technology (AT) research for Deaf people in a developing region. Non-traditional issues arise as a consequence of employing ...
  • Bibliometrics: tracking research impact by selecting the appropriate metrics 

    Henkel, Ralf (Medknow Publications, 2016)
    Traditionally, the success of a researcher is assessed by the number of publications he or she publishes in peer-reviewed, indexed, high impact journals. This essential yardstick, often referred to as the impact of a ...
  • Biodegradation of high-concentration isopropanol by a solvent-tolerant thermophile, Bacillus pallidus 

    Bustard, Mark T.; Whiting, Samantha; Cowan, Donald A.; Wright, Phillip C. (Springer Verlag, 2002)
    The aerobic biodegradation of high-concentration, to 24 g l –1 , 2-propanol (IPA) by a thermophilic isolate ST3, identified as Bacillus pallidus , was successfully carried out for the first time. This solvent-tolerant B. ...
  • Biodiversity: so much more than legs and leaves 

    Cowan, Don A.; Rybicki, Edward P.; Tuffin, Marla; Valverde, Angel; Wingfield, Michael (AOSIS OpenJournals, 2013)
    Microorganisms inhabit virtually every possible niche on Earth, including those at the outer envelope of survival. However, the focus of most conservation authorities and ecologists is the ‘legs and leaves’ side of biology ...
  • Bis(ferrocenylimine)palladium(II) and platinum(II) complexes: synthesis, molecular structures and evaluation as antitumor agents 

    Motswainyana, William M.; Onani, Martin O.; Madiehe, Abram M. (Elsevier, 2012)
    Compounds (ferrocenyl-2-furylmethyl)imine (L1), (ferrocenyl-2-thiophenemethyl)imine (L2) and (ferrocenyl-2-thiopheneethyl)imine (L3) were synthesized by condensation reactions and obtained in very good yields. Reactions ...
  • Black hole - galaxy correlations without self-regulation 

    Angles-Alcazar, Daniel; Ozel, Feryal; Dave, Romeel (American Astronomical Society, 2013)
    Recent models of black hole growth in a cosmological context have forwarded a paradigm in which the growth is self-regulated by feedback from the black hole itself. Here we use cosmological zoom simulations of galaxy formation ...
  • Blood pressure gradients and cardiovascular risk factors in urban and rural populations in Abia State South Eastern Nigeria using the WHO STEPwise approach 

    Okpechi, Ikechi Gareth; Chukwuonye, Innocent Ijezie; Tiffin, Nicki; Madukwe, Okechukwu Ojoemelam; Onyeonoro, Ugochukwu Uchenna; Umeizudike, Theophilus Ifeanyichukwu; Ogah, Okechukwu Samuel; Onyeonoro, Ugochukwu Uchenna (Public Library of Science, 2013)
    Background: Developing countries of sub-Saharan Africa (SSA) face a double burden of non-communicable diseases (NCDs) and communicable diseases. As high blood pressure (BP) is a common global cardiovascular (CV) disorder ...
  • Book review: estimating groundwater recharge 

    Xu, Yongxin (Springer Verlag, 2011)
  • Book review: urban geology 

    Xu, Yongxin (Springer Verlag, 2012)
  • Book review: Urban geology 

    Xu, Yongxin (Springer Verlag, 2012)
  • Borehole dilution experiment in a Karoo aquifer in Bloemfontein 

    Xu, Yongxin; van Tonder, Gerrit J.; van Wyk, B.; van Wyk, E.; Aleobua, B. (Water Research Commission, 1997)
    This paper shows that a borehole dilution experiment using common salt is a useful technique for better understanding of some hydrogeological features of a fractured aquifer. A sense of such tracer experiments was performed ...
  • A bridge over the computer science graduate skill gap 

    Blignaut, Renette; Venter, Isabella M.; Renaud, Karen (2013)
    Universities are increasingly required to respond to the ever evolving needs of an ever more sophisticated and globalised workplace, which requires well-rounded workers with more than mere technical knowledge. Employers ...
  • Bridging communications across the digital divide 

    Blake, Edwin H.; Tucker, William David (CTIT, 2004)
    Connecting people across the Digital Divide is as much a social effort as a technological one. We are developing a community-centered approach to learn how interaction techniques can compensate for poor communication across ...
  • 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 ...
  • Browser-based video communication for deaf people 

    Wang, Yuan Yuan; Tucker, William David (Telkom, 2009)
    This paper describes work in progress to to provide browser-based sign language communication for deaf users. The paper introduces the communication requirements for a disadvantaged Deaf community in Cape Town, describes ...
  • A calibration report for wireless sensor-based weatherboards 

    Muthoni, M.; Bagula, Antoine (MDPI, 2015)
    Sub-Saharan Africa contains the highest number of people affected by droughts. Although this can easily be mitigated through the provision of timely, reliable and relevant weather forecasts, the sparse network of weather ...