Browsing Research Articles (University of Pretoria) by UP Author "Fabris-Rotelli, Inger Nicolette"

Browsing Research Articles (University of Pretoria) by UP Author "Fabris-Rotelli, Inger Nicolette"

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  • The association between weather and crime in a township setting in South Africa 
    Potgieter, Arminn; Fabris-Rotelli, Inger Nicolette; Breetzke, Gregory Dennis; Wright, Caradee Yael (Springer, 2022-05)
  • Bootstrap testing for first-order stationarity on irregular windows in spatial point patterns 
    Kraamwinkel, Christine; Fabris-Rotelli, Inger Nicolette; Stein, Alfred (Elsevier, 2018-12)
    Kernel smoothing is commonly used in spatial point patterns to construct intensity plots. Kernels allow for visually and subjectively inferring on first-order stationarity. Formal objective tests exist for testing first-order ...
  • Covariate construction of nonconvex windows for spatial point patterns 
    Mahloromela, Kabelo; Fabris-Rotelli, Inger Nicolette; Kraamwinkel, Christine (South African Statistical Association (SASA), 2023)
    In some standard applications of spatial point pattern analysis, window selection for spatial point pattern data is complex. Often, the point pattern window is given a priori. Otherwise, the region is chosen using some ...
  • Effective graph sampling of a nonlinear image transform 
    De Lancey, Mark; Fabris-Rotelli, Inger Nicolette (CEUR Workshop Proceedings, 2019)
    The Discrete Pulse Transform (DPT) makes use of LULU smoothing to decompose a signal into block pulses. The most recent and effective implementation of the DPT is an algorithm called the Roadmaker's Pavage, which uses ...
  • Email communication in project management : a bane or a blessing? 
    Smit, Marius C.; Bond-Barnard, Taryn Jane; Steyn, Herman; Fabris-Rotelli, Inger Nicolette (AOSIS, 2017-08-11)
    BACKGROUND : Project success used to be measured solely in terms of efficiency metrics such as scope, cost and time; however, there are proposals that more attention should be paid to process-related performance factors ...
  • Estimating age in black South African children 
    Uys, Andre; Fabris-Rotelli, Inger Nicolette; Bernitz, Herman (South African Dental Association, 2014-03)
    Forensic dentists are frequently required to determine the age at death of unidentified skeletons, or to age live individuals who have no record / documentation of their chronological age. In order to be of the greatest ...
  • Evaluation of noise removal in signals by LULU operators 
    Fabris-Rotelli, Inger Nicolette; Van Oldenmark, K.; Van Staden, Paul Jacobus (South African Statistical Association, 2010-11)
    The LULU smoothers are effective nonlinear smoothers for signals. We investigate their ability to remove different noise types, namely symmetrical and skewed, as well as heavy- and light-tailed, thereby uncovering the true ...
  • Frequent-flier programs as a determinant in the selection of preferred airlines by corporations 
    Lubbe, Berendien Anna; Douglas, Anneli; Wieme, Lesley Liliane Patricia; Fabris-Rotelli, Inger Nicolette (Pennsylvania State University Press, 2013)
    Frequent-flier programs (FFPs) are used by airlines to generate loyalty and attract new customers. Research has shown that these programs signifi - cantly affect travelers’ choice of airlines. In the managed travel environment ...
  • A generic test for the similarity of spatial data 
    Kirsten, René; Fabris-Rotelli, Inger Nicolette (South African Statistical Association, 2021)
    Two spatial data sets are considered to be similar if they originate from the same stochastic process in terms of their spatial structure. Many tests have been developed over recent years to test the similarity of certain ...
  • Home range and movement patterns of reintroduced white lions (Panthera leo melanochaita) in the Kruger to Canyons Biosphere Reserve, South Africa 
    Turner, Jason A.; Dunston-Clarke, Emma J.; Fabris-Rotelli, Inger Nicolette; De Iongh, Hans (MDPI, 2022-08-08)
    White lions are a colour variant of the African lion Panthera leo melanochaita and disappeared from the wild due to anthropogenic factors until their reintroduction to the Greater Kruger Park Region of South Africa in ...
  • Ht-index for empirical evaluation of the sampled graph-based discrete pulse transform 
    De Lancey, Mark; Fabris-Rotelli, Inger Nicolette (Computer Society of South Africa, 2020-12-08)
    The Discrete Pulse Transform (DPT) makes use of LULU smoothing to decompose a signal into block pulses. The most recent and effective implementation of the DPT is an algorithm called the Roadmaker’s Pavage, which uses a ...
  • The impact of a call centre on communication in a programme and its projects 
    Bond-Barnard, Taryn Jane; Steyn, Herman; Fabris-Rotelli, Inger Nicolette (Elsevier, 2013-10)
    Call centres are increasingly being utilised in public sector programmes to facilitate and manage communication between numerous stakeholders. Yet, the impact of call centres on projects has not been investigated. This ...
  • The impact of the Canterbury Earthquakes on the temporal and spatial patterning of crime in Christchurch, New Zealand 
    Breetzke, Gregory Dennis; King, Marcus; Fabris-Rotelli, Inger Nicolette (Sage, 2018-03)
    The Canterbury Earthquakes struck the Canterbury region of the South Island of New Zealand between September 2010 and February 2011. The Earthquakes resulted in widespread structural damage to Christchurch, the main city ...
  • Inhomogeneous spatial modelling of DPT pulses for marine images 
    Fabris-Rotelli, Inger Nicolette; Stein, Alfred (Elsevier, 2018-12)
    The Discrete Pulse Transform (DPT) is a nonlinear decomposition of a signal and extracts the structures in a signal at discrete scale levels. This study models the image structure extracted using the DPT as connected ...
  • Introduction to the special issue “Uncertainty in remote sensing image analysis” 
    Stein, Alfred; Ge, Yong; Fabris-Rotelli, Inger Nicolette (MDPI Publishing, 2018)
    Images obtained from satellites are of an increasing resolution. In addition, the frequency of their observations is increasing, and is expected to continue to increase in the near future. Despite these rapid developments, ...
  • An investigation and historical overview of the G/M and M/G queueing processes 
    Fabris-Rotelli, Inger Nicolette; Kraamwinkel, Christine (South African Statistical Association, 2012-11)
    We present a historical and theoretical overview of the more complicated and less used G/M and M/G queueing processes, which allow for non-specific arrival and service time distributions. Such a model provides a more ...
  • Investigation of mandibular second molar root and canal morphology in a Black South African population using cone-beam computed tomography and two classification systems 
    Buchanan, Glynn Dale; Gamieldien, Mohamed Yasin; Fabris-Rotelli, Inger Nicolette; Van Schoor, Albert-Neels; Uys, Andre (Nihon University School of Dentistry, 2023)
    PURPOSE : To investigate the root and canal morphology of mandibular second molars, including anatomical variations, in a Black South African population using two classification systems. METHODS : Cone-beam computed ...
  • Linear hotspot detection for a point pattern in the vicinity of a linear network 
    Modiba, Jacob; Fabris-Rotelli, Inger Nicolette; Stein, Alfred; Breetzke, Gregory Dennis (Elsevier, 2022-10)
    The analysis of point patterns on linear networks is receiving current attention in spatial statistics. This refers to the analysis of points in a spatial domain that coincide with a linear network like a road network. The ...
  • LULU operators and discrete pulse transform for multidimensional arrays 
    Anguelov, Roumen; Fabris-Rotelli, Inger Nicolette (Institute of Electrical and Electronics Engineers, 2010-11)
    The LULU operators for sequences, that is, Ln,Un and their compositions, are extended to multidimensional arrays in a way which preserves their essential properties, e.g., consistent separation, total variation and shape ...
  • A Markov chain model for geographical accessibility 
    Thiede, Renate Nicole; Fabris-Rotelli, Inger Nicolette; Debba, Pravesh; Cleghorn, Christopher W. (Elsevier, 2023-06)
    Accessibility analyses are conducted for a variety of applications, including urban planning and public health studies. These applications may aggregate data at the level of administrative units, such as provinces or ...