Browsing Electrical, Electronic and Computer Engineering by Title

Browsing Electrical, Electronic and Computer Engineering by Title

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  • Waveguide power combiner with adjustable amplitude and phase response 
    Stander, Tinus; Sinha, Saurabh; International Conference on Radioelektronika (23rd : 2013 : Pardubice, Czech Republic) (Institute of Electrical and Electronics Engineers, 2013)
    Maximum gain from combining multiple high-power signals is achieved by equalising both the amplitude and phase of the combination. Achieving in-phase and equal amplitude power combining with amplifiers of unequal gain and ...
  • Weak defect identification for centrifugal compressor blade crack based on pressure sensors and genetic algorithm 
    Li, Hongkun; He, Changbo; Malekian, Reza; Li, Zhixiong (MDPI Publishing, 2018-04-19)
    The Centrifugal compressor is a piece of key equipment for petrochemical factories. As the core component of a compressor, the blades suffer periodic vibration and flow induced excitation mechanism, which will lead to ...
  • A web-based office climate control system using wireless sensors 
    Foster, Timothy W.; Bhatt, Deep Vardhan; Hancke, Gerhard P.; Silva, Bruno (Institute of Electrical and Electronics Engineers, 2016-08)
    Conventional heating, ventilating, and air conditioning (HVAC) systems usually achieve the desired control level by means of simple ON–OFF control, which can often result in high energy wastage. A potential solution to ...
  • When is it appropriate to model transmission of tuberculosis using a dose response model? 
    Strydom, Duayne; Küsel, R.R. (Ralf); Craig, Ian Keith (Elsevier, 2017-12)
    The risk of transmission of tuberculosis (TB) in confined spaces is analyzed using the Gammaitoni and Nucci model and its variant, a dose response model. The dose response model with its additional parameters has the benefit ...
  • When “okay” is not okay : acoustic characteristics of single-word prosody conveying reluctance 
    Van Zyl, Marianne; Hanekom, Johannes Jurgens (Acoustical Society of America, 2013-01)
    The present study explored the acoustic characteristics of prosodic cues that indicate a speaker’s reluctance when giving permission or agreement using a single word (“okay”). Eight speakers (four male, four female) ...
  • Wi-Fi fine time measurement : is it a viable alternative to ultrawideband for ranging in industrial environments? 
    Elikplim, Nkrow Raphael; Silva, Bruno; Hancke, Gerhard P.; Abu-Mahfouz, Adnan; Shu, Lei (Institute of Electrical and Electronics Engineers, 2023-09)
    Time-based ranging approaches have long been used for indoor positioning due to their reliability and accuracy. Two-way ranging (TWR) with ultrawideband (UWB) has often been utilized for indoor positioning systems (IPSs) ...
  • Wideband antenna for 4G MIMO applications 
    Kenny, Caitlin; Odendaal, J.W. (Johann Wilhelm); Joubert, Johan (Wiley, 2017-03)
    A small, wideband, multiple-input-multiple-output antenna is presented for 4G long term evolution (LTE) applications. The proposed antenna consists of a vertically polarized wideband stepped slot, as well as a horizontally ...
  • Wideband bandpass filter with extremely wide upper stopband 
    Malherbe, J.A.G., 1940- (Institute of Electrical and Electronics Engineers, 2018-06)
    The realization of planar wideband bandpass filters with an extremely wide upper stopband is described. The filter design differs from conventional approaches in which it is based on the choice of a wideband bandstop (BS) ...
  • Wideband bandstop filter with sub-harmonic stubs 
    Malherbe, J.A.G., 1940- (Institution of Engineering and Technology, 2011-05)
    The performance of a wideband bandstop transmission line filter employing a series overlay inductor over two stubs resonating at respectively one half and one quarter of the centre frequency, is described. The structure ...
  • A Wideband double ridge guide horn antenna as complex antenna transfer function standard 
    Nel, Mariesa (University of Pretoria, 2013)
    Ultra wideband (UWB) technology plays a significant role in wireless communication. The complex antenna transfer function (CATF) of an UWB antenna provides important information required for better channel designs and ...
  • Wideband low noise amplifier for highly sensitive square kilometre array receivers 
    Bimana, Abadahigwa (University of Pretoria, 2018)
    The noise figure (NF) of a low noise amplifier (LNA), which is the first active element in a receiver chain, determines the sensitivity of the receiver and its output signal-to-noise ratio (SNR). For most applications in ...
  • Wireless capacitive-based ECG sensing for feature extraction and mobile health monitoring 
    Wannenburg, Johann; Malekian, Reza; Hancke, Gerhard P. (Institute of Electrical and Electronics Engineers, 2018-07)
    In this paper, the concept of a wireless wearable device capable of measuring electrocardiogram (ECG) and respiration rate (RR) through the use of non-contact capacitive-based electrodes was designed and implemented. Both ...
  • Women's behavioral patterns in domestic tasks in Western Nigeria : hazards forecasting with neural network classifier 
    Adeyemi, Hezekiah Oluwole; Osifeko, Martins Ositola; Olanike, Olufisayo; Ade-Ikuesan, Olatunbosun Oluwakemi Blessing; Adesina, Ayobami Peter; Egbuobi, Udochukwu C. (Bridgewater State College, 2020)
    Behavioral pattern is the characteristic ways a person acts and has been recognized as a cause of many home accidents (h-accd). This study reviewed the types and prevalence of injuries among women in domestic works and ...
  • X-band reflection-type phase shifters using coupled-line couplers on single-layer RF PCB 
    Venter, J.J.P. (Johannes); Stander, Tinus; Ferrari, Philippe (Institute of Electrical and Electronics Engineers, 2018-09)
    In this letter, an X-band reflection-type phase shifter is presented. It is based on a single-layer stub-loaded coupled-line coupler loaded by two-varactor tuning circuits. This choice of coupler significantly improves on ...
  • An XML model for use across heterogeneous client–server applications 
    Chinnappen-Rimer, Suvendi; Hancke, Gerhard P. (Institute of Electrical and Electronics Engineers, 2008)
    Applications that use directory services or relational databases operate in a client–server model, where a client requests information from a server, and the server returns a response to the client. These client–server ...