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12 November 2018 | Story Leonie Bolleurs | Photo Stephen Collett
Inaugural lecture focuses on aspects of soil classification
Prof Cornie Van Huyssteen delivered his inaugural lecture on the topic: ‘The world in a grain of sand’, at the ninth inaugural lecture at the UFS this year.

Humans classify their environment to create order, make it more understandable, aid recollection and to communicate. As important it is for humans to classify their environments, so it is to classify soil, said Prof Cornie van Huyssteen.

Prof Van Huyssteen has studied and recorded data on soil worldwide to find the most appropriate use of land, in among others, the agriculture and mining sector and for urban development. 

It is all about soil

He was vice-chair of the International Union of Soil Sciences working group for the World Reference Base, and president of the Soil Science Society of South Africa. From 1991 to 1999 he worked at the Institute for Soil, Climate and Water of the Agricultural Research Council, where he aided in the land type survey and spatial analysis of soil data.

At his recent inauguration to full professor Prof Van Huyssteen delivered the ninth inaugural lecture at the University of the Free State’s Bloemfontein Campus for 2018, talking about a matter close to his heart, soil. He titled the lecture: ‘The world in a grain of sand’. 

Relevant to irrigation scheduling

A professor in the UFS Department of Soil, Crop and Climate Sciences, Prof Van Huyssteen’s research focuses on the relationship between soil morphology and soil hydrology. It can mostly be applied to hydropedology, wetland delineation, urban development, mining EIAs, irrigation scheduling and soil classification.

Prof Van Huyssteen joined the UFS in 2000, and in 2004, he completed his PhD in Soil Science. He is also author or co-author of 25 reviewed papers.

News Archive

Heart-valve studies receive international recognition
2017-07-11

 Description: Heart-valve studies  Tags: Heart-valve studies  

Prof Francis Smit, Head of the Department of
Cardiothoracic Surgery at the UFS, and Manager of the
Robert WM Frater Cardiovascular Research Centre, with
Kyle Davis, Mechanical Engineer at the centre.

Photo: Rulanzen Martin

Three heart-valve studies which have been developed at the Robert WM Frater Cardiovascular Research Centre at the School of Medicine at the University of the Free State (UFS) were recently presented in Monte Carlo at the conference of the prestigious global Heart Valve Society (HVS).

These studies are all headed by Prof Francis Smit, Head of the Department of Cardiothoracic Surgery at the UFS, and Manager of the Robert WM Frater Cardiovascular Research Centre.
Prof Smit says the HVS is a combination of the former heart-valve societies of Europe and the US. “Studies on heart-valve disease, heart-valve-related products and operations, as well as the design and development of new valves were presented. There are both clinical and development divisions.

He says the study in which the hemodynamics of their redesigned mechanical poppet valve was compared to a commercial bi-leaflet mechanical heart valve, was named as the best poster presentation in the experimental valve development and numerical flow dynamics division. The study, which was presented by Kyle Davis, mechanical engineer at the centre, competed against some of the best heart-valve research units in the world.

The redesigned valve, based on the 1960s Cape Town poppet valve, has the potential to provide a low-cost solution for mechanical heart-valve replacement. It is possible to produce the titanium ring with 3-D printers and is, together with the silicon poppet valve, extremely inexpensive compared to current mechanical valve-manufacturing processes.
The advantages of this valve over current mechanical valves is that, due to the effective and laminar flow characteristics, as well as the simple locking mechanisms, there is a reduced chance of valve thrombosis, and the need for anti-clotting drugs is therefore limited.

It was also confirmed that the new valve more than meets the published FDA (Federal Drug Agency) requirements, which determine the minimum standards of valves for human use in the US.

The redesigned valve also has a very low platelet activation impact, which is responsible for platelet thrombosis and leads to valve thrombosis or strokes. This valve is another heart-valve project by the centre, which is also in the process of evaluating a tri-leaflet polyurethane valve developed by them.


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