Browsing by Author "Fabris-Rotelli, Inger Nicolette"

Browsing by Author "Fabris-Rotelli, Inger Nicolette"

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  • LULU operators on multidimensional arrays and applications 
    Fabris-Rotelli, Inger Nicolette (University of Pretoria, 2010-08-17)
    The LULU operators, Ln and Un, are smoothers, that is they smooth data received as a signal. They are nonlinear and this nonlinearity makes them more robust but also more complicated to study since the projection theorem ...
  • 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, ...
  • An overview of noise in signal analysis 
    Fabris-Rotelli, Inger Nicolette; Smith, P.K. (South African Statistical Association, 2012-11)
    We present an overview of common methods for modelling a signal contaminated by noise. Specifically discussed are the structure imposed on a model, the properties the noise assumed, some common statistical distributions ...
  • The pattern and prevalence of vertebral artery injury in patients with cervical spine fractures 
    Ismail, Farzanah; Motsitsi, Nkosana Silas; Khan, Nausheen; Fabris-Rotelli, Inger Nicolette (Health and Medical Publishing Group, 2013-06)
    AIM. It is not uncommon for vertebral artery injury to occur when there are fractures through the transverse foraminae of the first to the sixth vertebral bodies. Other important risk factors for vertebral artery injury ...
  • Properties of the Discrete Pulse Transform for multi-dimensional arrays 
    Anguelov, Roumen; Fabris-Rotelli, Inger Nicolette (2010-03-04)
    This report presents properties of the Discrete Pulse Transform on multi-dimensional arrays introduced earlier in [1]. The main result given here in Lemma 2.1 is also formulated in [4, Lemma 21]. However, the proof, being ...
  • The proximity of sexual violence to schools : evidence from a township in South Africa 
    Breetzke, Gregory Dennis; Fabris-Rotelli, Inger Nicolette; Modiba, Jacob Mantjitji; Edelstein, Ian S. (Springer, 2021-04)
    Schools are unique places that greatly influence the daily lives of learners. Examining any factors that may be contributing to school absenteeism and dropout rates is vital as gaining an education is central to reducing ...
  • Root and canal morphology of maxillary second molars in a Black South African subpopulation using cone-beam computed tomography and two classifications 
    Buchanan, Glynn Dale; Gamieldien, Mohamed Yasin; Fabris-Rotelli, Inger Nicolette; Van Schoor, Albert-Neels; Uys, Andre (Wiley, 2023-09)
    This study investigated the root and canal morphology of maxillary second molars in a Black South African population using high-resolution cone-beam computed tomography. In total, 386 maxillary second molar teeth were ...
  • Root and canal morphology of the permanent anterior dentition 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, 2022-10)
    PURPOSE : This study investigated the root and canal morphology of the permanent anterior dentition in a Black South African population. METHODS : In total 2,343 permanent anterior teeth were evaluated using cone-beam ...
  • A spatial model with vaccinations for COVID-19 in South Africa 
    Dresselhaus, Claudia Josephina; Fabris-Rotelli, Inger Nicolette; Manjoo-Docrat, Raeesa; Brettenny, Warren; Holloway, Jenny; Thiede, Renate Nicole; Debba, Pravesh; Dudeni-Tlhone, Nontembeko (Elsevier, 2023-12)
    Since the emergence of the novel COVID-19 virus pandemic in December 2019, numerous mathematical models were published to assess the transmission dynamics of the disease, predict its future course, and evaluate the impact ...
  • Spatial sampling for a rabies vaccination schedule in rural villages 
    Fabris-Rotelli, Inger Nicolette; Reynolds, Hayley; Stein, Alfred; Loots, Theodor (Springer, 2020-12)
    Efforts are being made to contain rabies in Tanzania, reported in the southern highland regions, since 1954, and endemic in all districts in Tanzania currently. It has been determined that mass vaccination of at least 70% ...
  • A study of mandibular premolar 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, 2022)
    PURPOSE : An investigation of the configurations of mandibular premolar roots and canals in a population of Black South Africans. METHODS : Cone-beam computed tomography analysis of 772 mandibular premolars was performed, ...
  • Travel or technology? Business factors influencing management decisions 
    Douglas, Anneli; Lubbe, Berendien Anna; Fabris-Rotelli, Inger Nicolette (Department of Economics, University of Pretoria, 2013)
    There is an on-going debate on the use of technology as an alternative to business travel, with industry and academia differing in their views on such substitution. This study investigates the trend towards substitution ...
  • Uncertainty quantification for the extraction of informal roads from remote sensing images of South Africa 
    Thiede, Renate Nicole; Fabris-Rotelli, Inger Nicolette; Stein, Alfred; Debba, P.; Li, M. (Routledge, 2020)
    Informal unpaved roads in developing countries arise naturally through human movement without government authorities being informed. These roads are not authorized nor maintained by council, nor reliably mapped in ...
  • Use of fractals to measure anisotropy in point patterns extracted with the DPT of an image 
    Fabris-Rotelli, Inger Nicolette; Stein, Alfred (Elsevier, 2021-04)
    Please read abstract in the article.
  • Using spatial indices to measure dynamic racial residential segregation in Gauteng province (South Africa) 
    Katumba, Samy Kabangu; Coetzee, Serena Martha; Stein, Alfred; Fabris-Rotelli, Inger Nicolette (Routledge, 2023)
    Apartheid laws resulted in racial residential segregation that became entrenched into the urban morphology of South Africa. When apar-theid ended in the 1990’s, the new South African democratic government was resolved to ...