Browsing Research Articles (Computer Science) by Title

Browsing Research Articles (Computer Science) by Title

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  • Observing consistency in online communication patterns for user re-identification 
    Adeyemi, Ikuesan Richard; Razak, Shukor Abd; Salleh, Mazleena; Venter, H.S. (Hein) (Public Library of Science, 2016-12-05)
    Comprehension of the statistical and structural mechanisms governing human dynamics in online interaction plays a pivotal role in online user identification, online profile development, and recommender systems. However, ...
  • On compound purposes and compound reasons for enabling privacy 
    Van Staden, W.J.S. (Wynand Johannes Christiaan); Olivier, Martin S. (Graz University of Technology, 2011-02-01)
    This paper puts forward a verification method for compound purposes and compound reasons to be used during purpose limitation. When it is absolutely necessary to collect privacy related information, it is essential ...
  • On computer simulations, with particular regard to their application in contemporary astrophysics 
    Gruner, Stefan; Bartelmann, Matthias (Cosmos and History Publishing Co-op, 2020-10)
    In this survey contribution, which extends [GBa19], we consider and discuss computer simulations from a variety of perspectives with particular attention to computer simulations in astrophysics and cosmology. We begin by ...
  • On digital forensic readiness in the cloud using a distributed agent-based solution : issues and challenges 
    Kebande, Victor Rigworo; Venter, H.S. (Hein) (Taylor and Francis, 2018)
    The need to perform digital investigations has over the years led to the exponential growth of the field of Digital Forensics (DF). However, quite a number of challenges face the act of proving – for purposes of Digital ...
  • On more or less appropriate notions of ‘computation’ 
    Gravell, Andy M.; Gruner, Stefan (Computer Society of South Africa, 2018-07)
    Half a century after the emergence of computer science (a.k.a. informatics) as an academic discipline, the notion of ‘computation’ is not yet ‘settled’. On the contrary: recent developments in the natural sciences, in ...
  • On the historical semantics of the notion of software architecture 
    Gruner, Stefan (Vaal Triangle Faculty of Northwest University in South Africa, 2014-07)
    This study outlines in some detail the semantic variety of the notion of 'software architecture' in the field of software engineering since the early 1970s. This paper shows that there are two schools of thought in software ...
  • Optimal parameter regions and the time-dependence of control parameter values for the particle swarm optimization algorithm 
    Harrison, Kyle Robert; Engelbrecht, Andries P.; Ombuki-Berman, Beatrice M. (Elsevier, 2018-08)
    The particle swarm optimization (PSO) algorithm is a stochastic search technique based on the social dynamics of a flock of birds. It has been established that the performance of the PSO algorithm is sensitive to the values ...
  • Particle swarm optimization : understanding order-2 stability guarantees 
    Cleghorn, Christopher Wesley (Springer, 2019-03)
    This paper’s primary aim is to provide clarity on which guarantees about particle stability can actually be made. The particle swarm optimization algorithm has undergone a considerable amount of theoretical analysis. ...
  • Particle swarm optimization with crossover : a review and empirical analysis 
    Engelbrecht, Andries P. (Springer, 2016-02)
    Since its inception in 1995, many improvements to the original particle swarm optimization (PSO) algorithm have been developed. This paper reviews one class of such PSO variations, i.e. PSO algorithms that make use of ...
  • Particle swarm optimization-based empirical mode decomposition predictive technique for nonstationary data 
    Kuranga, Cry; Ranganai, Njodzi; Muwani, Tendai S. (Springer, 2022-12)
    Real-world nonstationary data are usually characterized by high nonlinearity and complex patterns due to the effects of different exogenous factors that make prediction a very challenging task. An ensemble strategically ...
  • Particle swarm stability : a theoretical extension using the non-stagnate distribution assumption 
    Cleghorn, Christopher Wesley; Engelbrecht, Andries P. (Springer, 2018-03)
    This paper presents an extension of the state of the art theoretical model utilized for understanding the stability criteria of the particles in particle swarm optimization algorithms. Conditions for order-1 and order-2 ...
  • Particle swarm variants : standardized convergence analysis 
    Cleghorn, Christopher Wesley; Engelbrecht, Andries P. (Springer, 2015-09)
    This paper presents an objective function specially designed for the convergence analysis of a number of particle swarm optimization (PSO) variants. It was found that using a specially designed objective function for ...
  • Perceptions of virtual globes, volunteered geographical information and spatial data infrastructures 
    Cooper, Antony Kyle; Coetzee, Serena Martha; Kourie, Derrick G. (Canadian Institute of Geomatics, 2010)
    The Internet has spawned the development of virtual communities or virtual social networks which generate and share information with one another, and with the public at large. Volunteered geographical information (VGI) ...
  • Performance costs of cryptography in securing new-generation Internet of Energy endpoint devices 
    Ledwaba, Lehlogonolo P.I.; Hancke, Gerhard P.; Venter, H.S. (Hein); Isaac, Sherrin J. (Institute of Electrical and Electronics Engineers, 2018)
    In past years, cryptography has been considered a dif cult task to achieve on sensor nodes for the Internet of Energy (IoE) owing to the resource-constrained nature of 8- and 16-bit microcontroller units (MCUs). Previous ...
  • Performance measures for dynamic multi-objective optimisation algorithms 
    Helbig, Marde; Engelbrecht, Andries P. (Elsevier, 2013)
    When algorithms solve dynamic multi-objective optimisation problems (DMOOPs), performance measures are required to quantify the performance of the algorithm and to compare one algorithm’s performance against that of other ...
  • Performance measures for dynamic multi-objective optimisation algorithms 
    Helbig, Marde; Engelbrecht, Andries P. (Elsevier, 2013)
    When algorithms solve dynamic multi-objective optimisation problems (DMOOPs), performance measures are required to quantify the performance of the algorithm and to compare one algorithm’s performance against that of other ...
  • Photovoice as a critical reflection methodology for a service learning module 
    Jordaan, Martina; Pieterse, Vreda (Higher Education South Africa, 2020-07)
    The article examines the value of using photovoice to assist reflection in a service learning module. Students were required to complete a reflective assignment in order to facilitate critical reflection on experiences ...
  • A polar coordinate particle swarm optimiser 
    Matthysen, Wiehann; Engelbrecht, Andries P. (Elsevier, 2011-01)
    The Particle Swarm Optimisation (PSO) algorithm consists of a population (or swarm) of particles that are “flown” through an n-dimensional space in search of a global best solution to an optimisation problem. PSO operates ...
  • Polychronicity tendency-based online behavioral signature 
    Ikuesan, Adeyemi Richard; Razak, Shukor Abd; Venter, H.S. (Hein); Salleh, Salleh M. (Springer, 2019-08)
    The proliferation of ubiquitous and pervasive computing devices has led to the emergence of research areas like Internet of things, and the Big-Data, which has seen a rise in obfuscation of online identity thus fueling an ...
  • Polynomial filtering : to any degree on irregularly sampled data 
    Reyneke, Pieter V.; Morrison, Norman; Kourie, Derrick G.; De Ridder, Corne (KoREMA - Croatian Society for Communications, Computing, Electronics, Measurement and Control, 2012)
    Conventionally, polynomial filters are derived for evenly spaced points. Here, a derivation of polynomial filters for irregularly spaced points is provided and illustrated by example. The filter weights and variance ...