Browsing Natural and Agricultural Sciences by UP Author "Fabris-Rotelli, Inger Nicolette"

Browsing Natural and Agricultural Sciences by UP Author "Fabris-Rotelli, Inger Nicolette"

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  • 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 ...
  • 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 ...
  • 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 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 ...
  • 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 ...
  • Meaningful batting averages in cricket 
    Van Staden, Paul Jacobus; Meiring, Albertus T.; Steyn, Johan A.; Fabris-Rotelli, Inger Nicolette (South African Statistical Association, 2010-11)
    In this paper we analyze and compare four different methods, designed to deal with the problem of an inflated batting average due to the presence of a high proportion of not-out innings. Batting records from the 2010 IPL ...
  • Metric evaluation of the anterior nasal spine to estimate sex and population group in South African individuals 
    Davidson, Christy Lana; De Klerk, Johan; Matejovsky, Zina; Fabris-Rotelli, Inger Nicolette; Uys, Andre (Springer, 2024)
    INTRODUCTION : The anterior nasal spine is a pointed, midline projection of the maxilla. This bony structure dictates the overlying soft tissues providing the phenotypic features of the nose and upper lip and determines ...
  • Modelling representative population mobility for COVID-19 spatial transmission in South Africa 
    Potgieter, A.; Fabris-Rotelli, Inger Nicolette; Kimmie, Z.; Dudeni-Tlhone, N.; Holloway, J.P.; Janse van Rensburg, C.; Thiede, Renate Nicole; Debba, P.; Manjoo-Docrat, R.; Abdelatif, N.; Khuluse-Makhanya, S. (Frontiers Media, 2021-10-22)
    The COVID-19 pandemic starting in the first half of 2020 has changed the lives of everyone across the world. Reduced mobility was essential due to it being the largest impact possible against the spread of the little ...
  • An overview of image segmentation techniques 
    Fabris-Rotelli, Inger Nicolette; Greeff, J.F. (South African Statistical Association, 2012)
    We present an overview of some image segmentation techniques, employed to extract regions of interest. Examples, with comparisons, are presented for Iterative Selection, Balanced Histogram, Otsu’s method, Wellner algorithm, ...
  • An overview of image segmentation techniques 
    Fabris-Rotelli, Inger Nicolette; Greeff, J.F. (South African Statistical Association, 2012-11)
    We present an overview of some image segmentation techniques, employed to extract regions of interest. Examples, with comparisons, are presented for Iterative Selection, Balanced Histogram, Otsu’s method, Wellner algorithm, ...