Browsing Faculty of Engineering by Title

Now showing items 1168-1187 of 2452

    • Handwritten signature verification : a hidden Markov model approach 

      Le Riche, Pierre (Pierre Jacques) (Stellenbosch : Stellenbosch University, 2000-12)
      ENGLISH ABSTRACT: Handwritten signature verification (HSV) is the process through which handwritten signatures are analysed in an attempt to determine whether the person who made the signature is who he claims to ...

    • Handwritten signature verification using hidden Markov models 

      Sindle, Colin (Stellenbosch : Stellenbosch University, 2003-12)
      ENGLISH ABSTRACT: Handwritten signatures are provided extensively to verify identity for all types of transactions and documents. However, they are very rarely actually verified. This is because of the high cost of ...

    • Hardware description language modelling and synthesis of superconducting digital circuits 

      Muchuka, Nicasio Maguu (Stellenbosch : Stellenbosch University, 2017-03)
      ENGLISH ABSTRACT: The energy demands and computational speed in high performance computers threatens the smooth transition from petascale to exascale systems. Miniaturization has been the art used in CMOS (complementary ...

    • Harmonic interaction between weak AC systems and VSC-based HVDC schemes 

      Krige, Ernst (Stellenbosch : Stellenbosch University, 2012-12)
      ENGLISH ABSTRACT: The implementation of the Caprivi Link Interconnector (CLI) High Voltage Direct Current (HVDC) scheme in 2010 connecting the weak Namibian and Zambian Alternating Current (AC) transmission networks via ...

    • Harmonic mixer analysis and design 

      Van der Merwe, Marius (Stellenbosch : Stellenbosch University, 2002-03)
      ENGLISH ABSTRACT: Harmonic mixers are capable of extended frequency operation by mixing with a harmonic of the LO (local oscillator) signal, eliminating the need for a high frequency, high power LO. Their output spectra ...

    • A health systems engineering approach to meeting the demand for skilled foetal ultrasound services in the Boland/Overberg public health district 

      Uys, Nina (Stellenbosch : Stellenbosch University, 2010-10)
      ENGLISH ABSTRACT: In its Millennium Development Goals, the United Nations prioritizes the improvement of maternal health in developing countries. The World Health Organization argues that this can be done through improving ...

    • Heat transfer to MHD oscillatory dusty fluid flow in a channel filled with a porous medium 

      Prakash, O. M.; Makinde, O. D.; Kumar, Devendra; Dwivedi, Y. K. (Indian Academy of Sciences, 2015)
      In this paper, we examine the combined effects of thermal radiation, buoyancy force and magnetic field on oscillatory flow of a conducting optically thin dusty fluid through a vertical channel filled with a saturated porous ...

    • Heat treatment of TI-6AL-4V produced by laserCUSING 

      Becker, Thorsten; Van Rooyen, Melody; Dimitrov, Dimitri (SAIIE, 2015)
      LaserCUSING® is a selective laser melting (SLM) process that is capable of manufacturing parts by melting powder with heat input from a laser beam. LaserCUSING demonstrates potential for producing the intricate geometries ...

    • Helicopter tail boom vibration analysis and suppression 

      Funnell, M. E. (Marc Edwin) (Stellenbosch : Stellenbosch University, 2002-04)
      ENGLISH ABSTRACT: An experimental investigation was conducted usmg a cantilever beam to illustrate an understanding of vibration techniques and phenomena. The [Tee and forced vibration of the cantilever beam was ...

    • Heliostat cost reduction for power tower plants. 

      Pidaparthi, Arvind Sastry (Stellenbosch : Stellenbosch University, 2017-03)
      ENGLISH ABSTRACT: Heliostats typically contribute to about 40 % of the total installed costs in a concentrated solar power (CSP) tower plant. The objective of this study is to investigate the effects of heliostat size on ...

    • A heliostat field control system 

      Malan, Karel Johan (Stellenbosch : Stellenbosch University, 2014-04)
      ENGLISH ABSTRACT: The ability of concentrating solar power (CSP) to efficiently store large amounts of energy sets it apart from other renewable energy technologies. However, cost reduction and improved efficiency is ...

    • Heliostat field layout optimization for a central receiver 

      Lutchman, Shanley Lawrence (Stellenbosch : Stellenbosch University, 2014-12)
      ENGLISH ABSTRACT: There are two methods generally used for heliostat field layout optimization: the field growth method and the pattern method. A third, less commonly used method also exists: the free variable method. ...

    • High accuracy numerical model of the SALT mirror support truss 

      De Lange, Billy (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: Although a numerical model of the mirror support truss of the Southern African Large Telescope (SALT) has already been developed during the design thereof, this thesis focuses on the development of the ...

    • High power LDMOS L-band radar amplifiers 

      McIver, Stuart Roderick Arthur (Stellenbosch : University of Stellenbosch, 2010-03)
      ENGLISH ABSTRACT: The thesis details the design, construction and experimental evaluation of 30W, 35W and 250W L-Band LDMOS Radar amplifiers. Each amplifier module contains an integrated high speed power supply in order ...

    • High pressure fluid phase equilibria 

      Du Rand, Marlie (Stellenbosch : Stellenbosch University, 2000-12)
      ENGLISH ABSTRACT: Supercritical extraction is being investigated as a possible alternative to the processes currently used in the fractionation of paraffinic waxes. By removing the lighter carbon fractions from the wax, ...

    • High speed cutting and electric discharge machining as complementary processes in the die and mould industry 

      Treurnicht, N. F. (Stellenbosch : Stellenbosch University, 2003-04)
      ENGLISH ABSTRACT: High Speed Cutting (HSC), specifically milling is a significant contemporary development in machining. The Die and Mould industry is experiencing a difficult business climate. There is competitive ...

    • High temperature phase equilibria in the Fe-Co-Cu-Si system pertinent to slag cleaning 

      Banda, Wezi (Stellenbosch : University of Stellenbosch, 2006-12)
      In the smelting of copper waste slags to recover cobalt and copper, the prediction of the metal liquidus temperature and the associated superheat for liquid metal handling for subsequent treatments cannot be done with ...

    • High voltage DC-DC converter using a series stacked topology 

      Van Rhyn, P. D. (Stellenbosch : University of Stellenbosch, 2006-03)
      This thesis presents the design and implementation of a high voltage DC-DC converter using a series stacked topology. The converter’s specifications were set by Spoornet and the converter forms part of a DC-AC inverter ...

    • High-power broadband absorptive waveguide filters 

      Stander, Tinus (Stellenbosch : University of Stellenbosch, 2009-12)
      ENGLISH ABSTRACT: This dissertation presents a synthesis method for broadband high-power absorptive microwave lters by cascading a wide stop-band wa e-iron lter with an absorptive harmonic pad. The classical image ...

    • High-speed 5-axis machining for tooling applications 

      Saxer, M.; De Beer, N.; Dimitrov, D. M. (Southern African Institute for Industrial Engineering, 2012-11)
      ENGLISH ABSTRACT: In the modern metalworking industry, production moulds often have complex geometry, with undercut regions, small corner radii, sharp edges, deep cavities, or large cores. Conventional manufacturing process ...