Ferdinand Postma : ’n Herinnering*

Onder hierdie drie woorde wil ek saamvat hoc professor Postma in sy huis en in die publiek opgetree het. Ek kan baie dinge wat hy gedoen het goed onthou. Sommige is kleiner dingetjies, maar wat tog tiperend is van ’n per- soon wat vastigheid onder eie voete gehad het en dit beklemtoon het as eis vir die lewe. Hierdie drie woorde het hy gebruik by ’n geleentheid toe hy gelukwense gerig het aan huwelikspaartjies, en onmiddellik lees u daarin nie die ligsinnigheid en fleurigheid wat soms grapmakenderwys in sulke omstan- dighede geuiter word nie. Die huwelik is ’n begin van ’n nuwe lewe en sy kenmerke moet wees: tydhou, koershou en aanhou

Jesus van Naseret- Jesus Christus

Inderdaad is daar hier 'n spanning in die christologie van Barth. U voel dit wel aan in hierdie benaming wat werklik so gekies is. Dit is twee bestaanswyses van die tweede Persoon in die Heilige Drie-eenheid. Laat die woord bestaanswyses ook nie vreemd in ons ore klink nie, want dit is nie vreemd aan Barth se stelsel nie. lmmers die drie Persone in die H. Drie-eenheid, elk met 'n besondere werksaamheid, is ook drie bestaanswyses. Ons het hier dus modaliteite in die Drie-eenheid en hoor dus vreemde taal, omdat Gods Woord tot ons spreek van God as syn

Bied die skrif heilsgeskiedenis

Dit skyn so ’n vanselfsprekende feit te wees dat ons dit maar kail aanvaar, en tog het daar ’n ander begtip na vore gekom wat nader ontleed moet word. Hierdie begrip "heilsgeskiedenis” is nie die gewone cen wat tot dusver gebruik is nie. Ons bet altyd gespreek van .,openbaringsgeskiedenis” wat in die Skrif gevind word en met baie groot vrymoedigheid kan ’n bevestigende antwoord gegee word, as hierdie ou bekende begrip hierbo voor die vraagteken gestaan het. Maar is openbaringsgeskiedenis dan volkome identies met heilsgeskiedenis? Het bier ’n wending gekom en is dit ’n wending wat verwelkom moet word, in die sin dat dit ’n suiwerder formulering bied? Of, en dit kan ook waar wees,  het ons hier 'n wysiging in ons opvatting aangaande die Heilige Skrif, ’n gevaarlike neiging, waarvoor ons op ons boede moet wees

Morele Herbewapening

Die beweging bekend onder hierdie naam is ’n ou bekende wat nou onder ’n ander naam presies dieselfde leer verkondig as wat in Suid-Afrika reeds in die twintiger jare baie goed bekend was

Modelling and analysis of a radio frequency dielectric heating for defatted soy flour

Abstract: In this paper a Radio Frequency (RF) method for drying defeated soy flower is developed using a class E amplifier. The raw and uncooked soy flour contains a few undesirable inherent soybean enzymes. Minimizing the content and effect of these enzymes usually is done through “drying/heating” methods. The method used in this study is “RF dielectric heating”. Modelling, simulation and implementation results complete the paper

The burden of depression and anxiety among medical students in South Africa: A cross-sectional survey at the University of Cape Town

Background. Depressive and anxiety disorders occur at very high rates among medical students. For instance, an international review and meta-analysis estimated the overall pooled crude prevalence of depression or depressive symptoms at 27.2%. However, South African (SA) data are very limited.Objectives. To determine rates of depression and anxiety among medical students and to examine the associations with various sociodemographic variables (biological sex, gender identity, household income, ethnicity, and clinical v. pre-clinical students). We also examined whether the ‘mini-semester’ of 2017 resulting from the 2016 ‘Fees Must Fall’ student protests was associated with increased depression/anxiety.Methods. The study was a cross-sectional electronic survey conducted in the Faculty of Health Sciences, University of Cape Town, using an anonymous, self-administered online questionnaire. The questionnaire included basic sociodemographic questions, the Patient Health Questionnaire-9 and the Hospital Anxiety and Depression Scale.Results. The sample consisted of 473 medical students, 333 (70.4%) female and 140 (29.6%) male. Based on ethnic self-identification, 165 (35.6%) were black, 144 (31.1%) white, 88 (19%) coloured, 52 (11.2%) Indian and 8 (1.7%) Asian. There were 239 pre-clinical students (50.5%) and 234 clinical students (49.5%). Of the sample, 36.4% were above the cut-off for major depressive disorder and 45.9% for anxiety disorder. Reported rates of disorders diagnosed by a health professional were 25.0% for depressive disorder and 20.5% for anxiety disorder, and 28.1% of all students were receiving psychotropic medication. Female sex was associated with both depression (prevalence ratio (PR) 3.7; p<0.001) and anxiety diagnoses (PR 4.7; p<0.001). None of the other sociodemographic characteristics showed significant associations. Interestingly, students who undertook the 2017 mini-semester showed an increased rate of depression (PR 2.1; p<0.05) and anxiety diagnoses (PR 2.1; p<0.05).Conclusions. Nearly one in four students reported depression/anxiety diagnoses and were on psychotropic medication, significantly more than age-based expectations. Even more screened positive for risk of depression/anxiety. Our findings indicate that medical students, particularly females, are at a significantly increased risk of depression and anxiety disorders. Results suggest that the 2016 student protests may have had a direct impact on the mental state of students. Multidisciplinary efforts should be targeted at initiatives to strengthen mental wellbeing and institutional culture around mental health. These efforts may help build resilience in the next generation of health professionals in SA ahead of work in an overburdened health and health education system.

New Periodic 6.7 GHz Class II Methanol Maser Associated with G358.460-0.391

Eight new class II methanol masers selected from the 6.7 GHz Methanol Multibeam survey catalogues I and II were monitored at 6.7 GHz with the 26m Hartebeesthoek Radio Astronomy Observatory (HartRAO) radio telescope for three years and seven months, from February 2011 to September 2014. The sources were also observed at 12.2 GHz and two were sufficiently bright to permit monitoring. One of the eight sources, namely G358.460-0.391, was found to show periodic variations at 6.7 GHz. The period was determined and tested for significance using the Lomb-Scargle, epoch-folding and Jurkevich methods, and by fitting a simple analytic function. The best estimate for the period of the 6.7 GHz class II methanol maser line associated with G358.460-0.391 is 220.0 $\pm$ 0.2 day.Comment: 8 pages, 11 figures, accepted for publication in MNRAS. The appendix of 4 pages (with 16 figures) will be published as online versio

Code Generation for Higher Inductive Types

Higher inductive types are inductive types that include nontrivial higher-dimensional structure, represented as identifications that are not reflexivity. While work proceeds on type theories with a computational interpretation of univalence and higher inductive types, it is convenient to encode these structures in more traditional type theories with mature implementations. However, these encodings involve a great deal of error-prone additional syntax. We present a library that uses Agda's metaprogramming facilities to automate this process, allowing higher inductive types to be specified with minimal additional syntax.Comment: 16 pages, Accepted for presentation in WFLP 201

Periodic variability of the mainline hydroxyl masers in G9.62+0.20E

We present the results of a monitoring campaign using the KAT-7 and HartRAO 26m telescopes, of hydroxyl, methanol and water vapour masers associated with the high-mass star forming region G9.62+0.20E. Periodic flaring of the main line hydroxyl masers were found, similar to that seen in the 6.7 and 12.2 GHz methanol masers. The 1667 MHz flares are characterized by a rapid decrease in flux density which is coincident with the start of the 12.2 GHz methanol maser flare. The decrease in the OH maser flux density is followed by a slow increase till a maximum is reached after which the maser decays to its pre-flare level. A possible interpretation of the rapid decrease in the maser flux density is presented. Considering the projected separation between the periodic methanol and OH masers, we conclude that the periodic 12.2 methanol masing region is located about 1600 AU deeper into the molecular envelope compared to the location of the periodic OH masers. A single water maser flare was also detected which seems not to be associated with the same event that gives rise to the periodic methanol and OH maser flares.Comment: 8 pages, 11 figure