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Browsing Research Articles (Statistics) by UP Author "Ehlers, Rene"
Now showing items 1-12 of 12
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Bougard, Nigel Bradley; Booyens, Karen; Ehlers, Rene (CRIMSA, 2015)The reality of rape as a direct form of contact crime remains deeply entrenched in South African communities, despite numerous efforts from various governmental stakeholders to curb this heinous crime. The Criminal Law ...
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Liebenberg, Rudolf; Van Heerden, Brigitte; Ehlers, Rene; Du Plessis, Ilse; Roos, J.L. (Johannes Louw) (Elsevier, 2016-09)Consistent associations have been found between advanced paternal age and an increased risk of psychiatric disorders, such as schizophrenia in their offspring. This increase appears to be linear as paternal age increases. ...
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Bekker, Andriette, 1958-; Roux, Jacobus J.J.; Ehlers, Rene; Arashi, Mohammad (Routledge, 2011-11)In this article, the bimatrix variate beta Type IV distribution is derived from independent Wishart distributed matrix variables. We explore specific properties of this distribution which is then used to derive the exact ...
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Oettle, Anna Catherina; Ehlers, Rene; Steyn, Maryna (Wiley, 2016-09)OBJECTIVES : The purpose of this study was to measure the mandibular angle as a reflection of the biomechanical forces acting on the mandible and relate it to aging and loss of teeth. METHODS : A total of 717 mandibles ...
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Bekker, Andriette, 1958-; Roux, Jacobus J.J.; Ehlers, Rene; Arashi, Mohammad (Elsevier, 2012-03)The product moments of existing and new noncentral bimatrix variate beta distributions with bounded domain are derived. From these, exact expressions for the distributions of statistics are obtained by using the Mellin ...
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Muller, M.; Kalmeier, G.; Eyal, P.; De Bruin, A.; Pool, Roger; Du Rant, C.; Ehlers, Rene; Stander, Andre; Van Schoor, Albert-Neels; Nortje, Evangeline; Du Toit, Peet J. (Health and Medical Publishing Group, 2017-09)BACKGROUND. The number of peripheral blood and endometrial natural killer cells varies greatly during implantation and the first trimester of pregnancy and is thought to play a role in the maintenance of a healthy pregnancy. ...
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Van der Merwe, Nicolaas J.; Karayiorgou, Maria; Ehlers, Rene; Roos, J.L. (Johannes Louw) (AOSIS Open Journals, 2020-04)BACKGROUND : Schizophrenia is a heterogeneous disorder with strong genetic vulnerability. Family history of schizophrenia has been considered in genetic studies under several models. De novo genetic events seem to play a ...
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Malherbe, P.J.; Karayiorgou, M.; Ehlers, Rene; Roos, J.L. (Johannes Louw) (Elsevier, 2017-05)We link schizophrenia in families from the genetically isolated South African Afrikaner population to chromosome 13q (n =51), 1p (n =23) and combined 13q & 1p (n =18). Patients with linkages to chromosome 13q were 4.16 ...
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Phenotypic features of patients with schizophrenia carrying de novo gene mutations : a pilot study Malherbe, P.J.; Roos, J.L. Jr.; Ehlers, Rene; Karayiorgou, Maria; Roos, J.L. (Johannes Louw) (Elsevier, 2015-01)Genome-wide scans have revealed a significant role for de novo copy number variants (CNVs) and Single Nucleotide variants (SNVs) in the genetic architecture of schizophrenia. The present study attempts to parse schizophrenia ...
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Van Rooy, Mia-Jeanne; Duim, Wiebren; Ehlers, Rene; Buys, Antoinette V.; Pretorius, Etheresia (BioMed Central, 2015)BACKGROUND : Strokes are commonly preceded by transient ischemic attacks (TIAs). TIA is often associated with metabolic syndrome (causing chronic inflammation), resulting in a proinflammatory- and procoagulantenvironment. The ...
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Maree, J.G. (Kobus); Molepo, Jacob Maisha; Owen, J.H.; Ehlers, Rene (Suid Afrikaanse Akademie vir Wetenskap & Kuns, 2005)Problem-based approach to mathematics in grades 9 and 11 in the Limpopo Province: Teachers of schools in the central region of the Limpopo Province of South Africa received training in a problem-based approach to the ...
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Ehlers, Rene; Bekker, Andriette, 1958-; Roux, Jacobus J.J. (South African Statistical Association, 2012)The enriched triply noncentral bivariate beta type V distribution is introduced. This distribution is constructed from independent chi-squared random variables by using the variables-in-common (or trivariate reduction) ...
Now showing items 1-12 of 12