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23 September 2022 | Story Anthony Mthembu | Photo iFlair Photography
Umakhoyane
Umakhoyane: Indigenous South African instrument affiliated with the Zulu tribe.

According to Dr Absolum Nkosi, Senior Lecturer in the Odeion School of Music at the University of the Free State (UFS), “ancient traditional instruments form part of the African heritage”. As such, with Heritage Day upon us, it is imperative to highlight these South African indigenous musical instruments. 

Some of the most prominent South African musical instruments currently in the possession of the UFS, include uhadi and umakhoyane, also referred to as ugubhu. At first glance, one would think that these instruments are the same. This would not be an incorrect assumption. In fact, these instruments share similarities in terms of purpose and how they have been used throughout their existence. 

Similarities and differences between the instruments
For instance, both uhadi and umakhoyane (ugubhu) are instruments traditionally played by women. Dr Nkosi maintains that songs accompanied by any of these instruments are usually personal, as they cover topics such as love, family, and relationships. Furthermore, the songs that were sung with the assistance of these instruments, were also about a reflection of the individual’s mental state. As such, the fact that both instruments have a very soft sound aided in that reflective process. 

However, there are key variations between these instruments. Uhadi is a single-string acoustic bow affiliated with the Xhosa tribe, whereas umakhoyane is a single-string acoustic bow affiliated with the Zulu tribe. In addition, umakhoyane possesses a bridge in the middle that uhadi does not. Furthermore, there is also a difference in the sound produced by the two instruments. “Uhadi produces one sound when it is played with the string openly without touching it; you can then get the second sound by pinching and releasing the string using the index finger and a thumb. However, umakhoyane produces two notes when playing the string on the upper and the lower level. The bridge in the middle of the string divides it into an upper part (low tone) and a lower part (high tone),” Dr Nkosi indicated.  

It is imperative to note that these instruments have adapted over time. In fact, they have been used in genres such as Jazz and contemporary Afro music. Therefore, Dr Nkosi believes that the preservation of these indigenous instruments is essential, as it keeps the African musical identity alive. 

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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