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Defence, peace, safety & security

Recent Submissions

  • Berglund, Martin; Drewes, F; Van der Merwe, B (2018-08)
    Modern regular expression matching software features many extensions, some general while some are very narrowly specified. Here we consider the generalization of adding a class of operators which can be described by, e.g. ...
  • Ntshabele, K; Isong, B; Dladlu, N; Abu-Mahfouz, Adnan MI (IEEE, 2018-10)
    One of the challenges faced by Wireless sensor networks (WSNs) is the issue of uncontrollable interference as the spectrum becomes congested due to the current proliferation of wireless devices. Cognitive radio (CR) emerged ...
  • Manuel, M; Isong, B; Esiefarienrhe, M; Abu-Mahfouz, Adnan MI (IEEE, 2018-10)
    Wireless Sensor Networks (WSNs) are network paradigm that are constrained by several challenges such as management of the network, energy consumption, data processing, quality of services (QoS) provisioning, and security. ...
  • Mawonde, K; Isong, B; Lugayizi, F; Abu-Mahfouz, Adnan MI (IEEE, 2018-10)
    Vehicle security is an emergent issue in the technology sector that has benefited from the continuous advancement in technology through the creation of more complex and advanced security systems. This serves to address the ...
  • Pieterse, Heloise; Olivier, M; Van Heerden, Renier P (Springer, 2018-08)
    Ever improving technology allows smartphones to become an integral part of people's lives. The reliance on and ubiquitous use of smartphones render these devices rich sources of data. This data becomes increasingly important ...
  • Manickchand, Kaveer; Strydom, Johannes J; Mishra, AK (IEEE, 2017-09)
    The goal of this study was to research TOA exclusive tracking and deinterleaving algorithms applied to radar emitters in an EW environment for application on FPGA-based DRFM platforms. In this paper sequence search (SS), ...
  • Litvin, Igor A; King, Gary R; Strauss, Hencharl J (Springer, 2017-06)
    We propose a novel intra-cavity laser beam shaping technique based on the manipulation of the transverse gain profile in the laser crystal. The method allows controllable reshaping of a laser output beam into a desired ...
  • Pretorius, Arnu; Kroon, Steve; Kamper, Herman (2018-07)
    Denoising autoencoders (DAEs) have proven useful for unsupervised representation learning, but a thorough theoretical understanding is still lacking of how the input noise influences learning. Here we develop theory for ...
  • Shingange, Katekani; Swart, HC; Mhlongo, Gugu H (Elsevier, 2018-04)
    Herein, we present ZnO rose-like hierarchical nanostructures employed as support to Au nanoparticles to produce Au functionalized three dimensional (3D) ZnO hierarchical nanostructures (Au/ZnO) for NO2 detection using a ...
  • Burke, Ivan D; Herbert, A; Mooi, Roderick D (Association for Computing Machinery, 2018-09)
    Distributed Denial of Service (DDoS) attacks cause significant disruption on critical networks within South Africa. Timely detection and mitigation is a key concern for the SANReN Cyber Security Incident Response Team ...
  • Mtsweni, Jabu S; Gcaza, Noluxolo; Thaba, James M (ACM, 2018-09)
    Information and Communication Technologies (ICTs) present a number of vulnerabilities, threats and risks that could lead to devastating cyber-attacks resulting into hugh financial losses, legal implications, and reputational ...
  • Prabhakar, Shashi; Mabena, Chemist M; Konrad, T; Roux, FS (American Physical Society, 2018-01)
    The effect of a decoherence channel, such as a turbulent atmosphere, on the second-order quantum interference in the Hong-Ou-Mandel (HOM) effect is investigated. The investigation includes both theoretical analyses and an ...
  • De Freitas, A; Focke, Richard W; De Villiers, P (IEEE, 2018-07)
    Sensor management is an important function of any data fusion center as the output of a fusion system is dependent on the quality of the information collected. In this paper, the scheduling aspect of sensor management ...
  • Ramotsoela, D; Abu-Mahfouz, Adnan MI; Hancke, G (MDPI, 2018-08)
    The increased use of IndustrialWireless Sensor Networks (IWSN) in a variety of different applications, including those that involve critical infrastructure, has meant that adequately protecting these systems has become a ...
  • Berman, Robert J; Rosman, Benjamin S; Van Niekerk, B; Nordengen, Paul (2018-10)
    The ever increasing global freight task brings with it a number of challenges for road freight transportation. The combination of high-capacity vehicles and Performance-based Standards (PBS) is proving to be a viable and ...
  • Oosthuizen, Rudolph; Molekoa, Malinkeng M; Mouton, Francois (2018-11)
    Cyber-attacks pose a major modern era threat to organisations that use networks (e.g., corporate networks and the Internet) to facilitate and improve business processes. The complexity of Internet vulnerability and increasing ...
  • Sroor, H; Lisa, Nyameko; Naidoo, Darryl; Litvin, Ihar; Forbes, A (American Physical Society, 2018-04)
    Creating high-quality vector vortex (VV) beams is possible with a myriad of techniques at low power, and while a few studies have produced such beams at high power, none have considered the impact of amplification on the ...
  • Sroor, H; Naidoo, Darryl; Courtial, J; Forbes, A (SPIE, 2018-02)
    Mathematical self-similar fractals manifest identical replicated patterns at every scale. Recently, fractals have found their way into a myriad of applications. In optics, it has been shown that manipulation of unstable ...
  • Naidoo, Darryl; Litvin, Ihar; Forbes, A (SPIE, 2017-02)
    We investigate the selection of a flat-top beam and a Gaussian beam inside a laser cavity on opposing mirrors. The concept is tested external to the laser cavity in a single pass and double pass regime where the latter ...
  • Oosthuizen, Rudolph; Venter, Jacobus P; Serfontein, Christian J (2018-11)
    Systems Engineering for complex and sociotechnical systems is becoming increasingly difficult due to growing complexity in the problem and solution space. This resulted to the development of Model Based Systems Engineering ...

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