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Team UFS completes very first Sasol Solar Challenge

21 September 2022 | Story Leonie Bolleurs | Photo Johané Odendaal and Edward Lee

UFS Solar car — Team UFS entered the Sasol Solar Challenge for the very first time this year, competing with seven other teams and showcasing their technological input and innovation.

Excitement. Nervousness. A thousand thoughts going through our minds, but primarily “Are we really ready for the challenges that lie ahead?” and “What did we get ourselves into?” In the moments leading up to this year’s Sasol Solar Challenge, these were the thoughts and emotions of Team UFS, who entered their solar car, Lengau.

“But I had confidence in the team,” says Dr Hendrik van Heerden from the UFS Department of Physics at the University of the Free State (UFS) and project manager of Team UFS who entered the challenge for the very first time this year.

Testing perseverance

Entering the Sasol Solar Challenge – a biennial competition that has been running since 2008 – Team UFS competed against seven other teams (representing local and international universities, high schools, and engineering teams), sharing the public roads of South Africa with trucks and regular traffic, sometimes experiencing steep mountain climbs, testing not only their technological input and innovation, but also their perseverance over an eight-day period.

“One of our main challenges was the long time on the road, to which the heavy weight of the solar car, efficiency of the solar panels, and the effective charging of the battery contributed,” says Dr Van Heerden, stating that these problems were difficult to tackle with the small budget they had. “We, however, stayed positive and was determined to pull through.”

“We were also open for learning from the other teams, the scrutineers, and observers regarding the mechanical, electrical, and body of competing solar cars. Thus, building knowledge and collaborating is a success we celebrate,” he adds.

In the end it paid off, as Team UFS completed the race, covering a distance of more than 500 km and ending in seventh place overall. The team that finished with the greatest distance covered within the allotted time won the challenge, in this instance the Brunel Solar Team, covering 4 228,2 km.

Dr Van Heerden believes that they did exceptionally well for a debut team, proving themselves against the best. “I am of the opinion that this challenge made us stronger and gave each of us a new perspective on how we should approach life,” he adds.

“As we are all enthusiastic about science and engineering, this challenge inspired us to build towards a future where renewable energy could be an important source of energy in South Africa.”

For a debut team, we did exceptionally well, proving ourselves against the best. – Dr Hendrik van Heerden.

Learning the ropes

The teams left Carnival City in Johannesburg on 9 September 2022 and arrived at the finish line at the V&A Waterfront in Cape Town on Friday 16 September 2022.

Talking about the next race, Dr Van Heerden says he wants to build a better, more effective solar car. “We strive to continuously improve the design, technology, and science going into our car,” he says.

“For this challenge, we were interested in learning about the mechanical, electrical, and overall body of a solar car. Hence, our solar vehicle was designed well enough to participate and reliable enough to succeed.”

According to him, their focus will shift to competing against the other teams for the next Sasol Solar Challenge. “We will also be more prepared, since we now know what to expect from the challenge. It was our first time participating in the Sasol Solar Challenge, and we’ve learnt so much from the past two weeks – we will carry that forward to the next challenge.

News Archive

Fight against Ebola virus requires more research

2014-10-22

Dr Abdon Atangana
Photo: Ifa Tshishonge

Dr Abdon Atangana, a postdoctoral researcher in the Institute for Groundwater Studies at the University of the Free State (UFS), wrote an article related to the Ebola virus: Modelling the Ebola haemorrhagic fever with the beta-derivative: Deathly infection disease in West African countries.

“The filoviruses belong to a virus family named filoviridae. This virus can cause unembellished haemorrhagic fever in humans and nonhuman monkeys. In literature, only two members of this virus family have been mentioned, namely the Marburg virus and the Ebola virus. However, so far only five species of the Ebola virus have been identified, including: Ivory Coast, Sudan, Zaire, Reston and Bundibugyo.

“Among these families, the Ebola virus is the only member of the Zaire Ebola virus species and also the most dangerous, being responsible for the largest number of outbreaks.

“Ebola is an unusual, but fatal virus that causes bleeding inside and outside the body. As the virus spreads through the body, it damages the immune system and organs. Ultimately, it causes the blood-clotting levels in cells to drop. This leads to severe, uncontrollable bleeding.

Since all physical problems can be modelled via mathematical equation, Dr Atangana aimed in his research (the paper was published in BioMed Research International with impact factor 2.701) to analyse the spread of this deadly disease using mathematical equations. We shall propose a model underpinning the spread of this disease in a given Sub-Saharan African country,” he said.

The mathematical equations are used to predict the future behaviour of the disease, especially the spread of the disease among the targeted population. These mathematical equations are called differential equation and are only using the concept of rate of change over time.

However, there is several definitions for derivative, and the choice of the derivative used for such a model is very important, because the more accurate the model, the better results will be obtained. The classical derivative describes the change of rate, but it is an approximation of the real velocity of the object under study. The beta derivative is the modification of the classical derivative that takes into account the time scale and also has a new parameter that can be considered as the fractional order.

“I have used the beta derivative to model the spread of the fatal disease called Ebola, which has killed many people in the West African countries, including Nigeria, Sierra Leone, Guinea and Liberia, since December 2013,” he said.

The constructed mathematical equations were called Atangana’s Beta Ebola System of Equations (ABESE). “We did the investigation of the stable endemic points and presented the Eigen-Values using the Jacobian method. The homotopy decomposition method was used to solve the resulted system of equations. The convergence of the method was presented and some numerical simulations were done for different values of beta.

“The simulations showed that our model is more realistic for all betas less than 0.5. The model revealed that, if there were no recovery precaution for a given population in a West African country, the entire population of that country would all die in a very short period of time, even if the total number of the infected population is very small. In simple terms, the prediction revealed a fast spread of the virus among the targeted population. These results can be used to educate and inform people about the rapid spread of the deadly disease,” he said.

The spread of Ebola among people only occurs through direct contact with the blood or body fluids of a person after symptoms have developed. Body fluid that may contain the Ebola virus includes saliva, mucus, vomit, faeces, sweat, tears, breast milk, urine and semen. Entry points include the nose, mouth, eyes, open wounds, cuts and abrasions. Note should be taken that contact with objects contaminated by the virus, particularly needles and syringes, may also transmit the infection.

“Based on the predictions in this paper, we are calling on more research regarding this disease; in particular, we are calling on researchers to pay attention to finding an efficient cure or more effective prevention, to reduce the risk of contamination,” Dr Atangana said.

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