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15 January 2024 | Story André Damons | Photo Supplied
CHPC students read more
The top finishing UFS team, Team 5, consisting of Nhlonipho Shezi, Kgoboketso Mphahlele, Albert van Eck (mentor), Itumeleng Khaka, and Bophelo Pharasi came third during the national round of the National Integrated Cyber Infrastructure Systems (NICIS) CHPC’s Student Cluster Competition.

Two students from the University of the Free State (UFS) who took part in the National Integrated Cyber Infrastructure Systems (NICIS) CHPC Student Cluster Competition were selected as part of the National Team to compete at the International Supercomputing Conference (ISC) Student Cluster Competition next year.

Itumeleng Khaka and Nhlonipho Shezi, both currently studying towards a Bachelor of Science degree in Information Technology majoring in Computer Science and Business Management, were part of one of the university’s teams (Team 5) that took third place during the national round of the competition.

Bophelo Pharasi (Bachelor of Science in Information Technology majoring in Computer Science and Business Management) and Kgoboketso Mphahlele (Bachelor of Computer Information Systems) were the other team members, and Albert van Eck, Head of the eResearch and High-Performance Computing Unit, was their mentor. The UFS entered three teams for the competition. 

Another student, Limpho Senatla (Bachelor of Science in Information Technology), was awarded the prize for the female student with the most potential during this competition. Some of the prizes awarded to her include an opportunity to work under the mentorship of sponsors such as Tsolo.io, Diplomics, Intel, and the South African Radio Astronomy Observatory (SARAO).

The other two teams that also participated were Team OptiCompute (mentor: Hendrik van Heerden), consisting of Senatla, Siphesihle Mvelase (Bachelor of Science in Information Technology majoring in Computer Science and Business Management), Ziphezinhle Malinga (Bachelor of Science in Information Technology majoring in Computer Science and Business Management), Ennosse Mkhutyukelwa (Bachelor of Science in Information Technology majoring in Computer Science and Chemistry); and Team KKRT (mentor: Zirke le Roux), consisting of Kananelo Nyakallo Mofokeng (Bachelor of Science in Information Technology majoring in Computer Science and Physics), Boitumelo Ramasike (Bachelor of Science in Information Technology majoring in Computer Science and Business Management), Kamohelo Kolanchu (Bachelor of Science in Information Technology majoring in Computer Science and Mathematics), and Thabang Maokeng (Bachelor of Computer Information Systems).

Highly stressful and demanding

“Since 2017, the UFS has competed in the CHPC Student Cluster Competition, with various successful outcomes. This year was no exception, with Team 5 winning third place at the national round. All teams endured a highly stressful and demanding round where external factors such as load shedding, late and incomplete hardware deliveries, extreme heat, and sleep deprivation played a role,” says Van Eck.

According to its website, the Centre for High-Performance Computing (CHPC), a division of the Council for Scientific and Industrial Research (CSIR), annually hosts a Human Capital Development (HCD) programme for undergraduate students currently enrolled in Science, Technology, Engineering and Mathematics (STEM) fields at South African universities. They undergo training that will take them from zero knowledge of HPC to being able to build mini clusters through various rounds.

The competition is held annually and consists of three rounds: a selection, national, and international round. A team composed of four undergraduate (second-year) students can enter the competition.

This year, twenty teams from eight universities participated in the selection round. Each year, this round is hosted at a different university in the country, with the UFS Bloemfontein Campus playing host this year from 10 to 15 July. During the first round, students were exposed to various technologies and concepts used in HPC and scientific computing. Students were then evaluated according to their technical skills acquired during the selection round, and had to design, present, and defend a cluster design with its network topology.

The national round, for which all three UFS teams qualified, was held at the Kruger National Park from 3 to 8 December.

Travel internationally

According to Van Eck, the students were given a limited budget to procure a small cluster for this round. Students then had to assemble the cluster and start configuring it during this round. After installing and configuring their clusters, students had to install and optimise scientific software. Installing and optimising scientific software is quite challenging. One must consider various technologies such as hardware components, networking, operating systems, compilers, intercommunication between processes, and the functionality of the software.

The winning team in the national round is combined with two members of either the second or third-place winners and two reserves selected from those teams. This team will travel to Austin, Texas, early next year to visit the Texas Advanced Computing Centre (TACC). Students will also undergo more training at Dell Labs in the USA.

The team will compete at the International Supercomputing Conference (ISC) Student Cluster Competition (SCC) against teams from across America, Europe, and Asia. This competition is held in Germany and sees the best international students competing in the final round. The South African teams have won this round on several occasions.

“The competition takes all students out of their comfort zones. The technologies and methodologies they are exposed to are state-of-the-art in theoretical and computational sciences. In the first round, students are trained by industry professionals on concepts they would otherwise never be exposed to. They come into contact with multiple disciplines within IT, engineering, and some scientific fields. The learning curve during this competition is immense, but students who rise to the challenge reap the benefits in the long run. With prizes such as laptops, prize money, and mentorship from the industry, multiple opportunities can be utilised,” says Van Eck.

Exposure to various technologies

Van Eck says even members from teams that do not make it into the top positions can benefit from exposure to various technologies and networking with other delegates. Leveraging knowledge attained during the competition also enhances one's ability to apply knowledge to other parts of one's career.

“To become an HPC specialist, one must master various field-specific domains, and each of these domains can become a career in itself should a student identify a specific field of more interest to them. This type of exposure is usually only experienced once one enters the workforce. It may be difficult and costly to enter a specific domain by that time. Earlier exposure during a competition like this can assist a student in identifying which fields of science, engineering, or IT they would like to focus on and perhaps later specialise in.”

News Archive

Research eradicates bacteria from avocado facility
2017-01-17

 Description: Listeria monocytogenes Tags: Listeria monocytogenes

Listeria monocytogenes as seen under an electron
microscope. The photo was taken with a transmission
electron microscope at the microscopy unit of the UFS.
Bacteriophages (lollipop-like structures) can be seen
next to the bacterial cells.
Photo: Supplied

“The aim of my project was to identify and characterise the contamination problem in an avocado-processing facility and then to find a solution,” said Dr Amy Strydom, postdoctoral fellow in the Department of Microbial Biochemical and Food Biotechnology at the University of the Free State (UFS).

Her PhD, “Control of Listeria monocytogenes in an Avocado-processing Facility”, aimed to identify and characterise the contamination problem in a facility where avocados were processed into guacamole. Dr Strydom completed her MSc in food science in 2009 at Stellenbosch University and this was the catalyst for her starting her PhD in microbiology in 2012 at the UFS. The research was conducted over a period of four years and she graduated in 2016. The research project was funded by the National Research Foundation.

The opportunity to work closely with the food industry further motivated Dr Strydom to conduct her research. The research has made a significant contribution to a food producer (avocado facility) that will sell products that are not contaminated with any pathogens. The public will then buy food that is safe for human consumption.


What is Listeria monocytogenes?

Listeria monocytogenes is a food-borne pathogenic bacterium. When a food product is contaminated with L. monocytogenes, it will not be altered in ways that are obvious to the consumer, such as taste and smell. When ingested, however, it can cause a wide range of illnesses in people with impaired immune systems. “Risk groups include newborn babies, the elderly, and people suffering from diseases that weaken their immune systems,” Dr Strydom said. The processing adjustments based on her findings resulted in decreased numbers of Listeria in the facility.

The bacteria can also survive and grow at refrigeration temperatures, making them dangerous food pathogens, organisms which can cause illnesses [in humans]. Dr Strydom worked closely with the facility and developed an in-house monitoring system by means of which the facility could test their products and the processing environment. She also evaluated bacteriophages as a biological control agent in the processing facility. Bacteriophages are viruses that can only infect specific strains of bacteria. Despite bacteriophage products specifically intended for the use of controlling L. monocytogenes being commercially available in the food industry, Dr Strydom found that only 26% of the L. monocytogenes population in the facility was destroyed by the ListexP100TM product. “I concluded that the genetic diversity of the bacteria in the facility was too high and that the bacteriophages could not be used as a control measure. However, there is much we do not understand about bacteriophages, and with a few adjustments, we might be able to use them in the food industry.”

Microbiological and molecular characterisation of L. monocytogenes

The bacteria were isolated and purified using basic microbiological culturing. Characterisation was done based on specific genes present in the bacterial genome. “I amplified these genes with polymerase chain reaction (PCR), using various primers targeting these specific genes,” Dr Strydom said. Some amplification results were analysed with a subsequent restriction digestion where the genes were cut in specific areas with enzymes to create fragments. The lengths of these fragments can be used to differentiate between strains. “I also compared the whole genomes of some of the bacterial strains.” The bacteriophages were then isolated from waste water samples at the facility using the isolated bacterial strains. “However, I was not able to isolate a bacteriophage that could infect the bacteria in the facility.

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