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29 October 2024 | Story Leonie Bolleurs | Photo Supplied
Thandi Mazibuko
Thandi Mazibuko, with her presentation: LED there be light, was the overall institutional winner in the PhD category and the runner-up in the national competition of this year’s 3MT competition.

The Centre for Graduate Support (CGS) recently (11 October 2024) hosted the annual institutional Three-Minute Thesis Competition (3MT), which was followed by the national competition (25 October). This year, the nationals took place on the UFS Bloemfontein Campus. According to Tshepiso Mokoena, responsible for Research Capacity Development in CGS, the participating master’s and PhD students gave well-prepared presentations. The competition aims to equip postgraduate students with valuable communication and presentation skills.

She says that postgraduate students are encouraged to do research that will benefit the community. “To do this, students should be able to communicate and present their research to a non-specialist audience. The 3MT competition trains and equips them with skills that they will use in their community and workplace,” she noted.

Overall PhD winner

The overall winner in the PhD category of the UFS competition was Thandi Mazibuko with her presentation: LED there be light. Thandi was also announced as the first runner-up at the national competition.

Growing up in Qwaqwa, Thandi’s passion for mathematics and the natural sciences led her to pursue a BSc Physics degree at the UFS in 2013, followed by an honours at the UFS. She then completed her MSc at the University of the Western Cape and worked as a science engagement intern at iThemba LABS in Cape Town, which inspired her to start a YouTube channel with more than 4 800 subscribers, called Thandisayensi. On this channel she uploads Physical Sciences videos for learners in grades 10-12.

Thandi states that she loves learning and being in learning environments; in 2022, she registered for a PhD in Solid State Physics under the supervision of Prof Hendrik Swart and Prof David Motaung.

Her research focuses on synthesising a phosphor material capable of emitting red, green, and blue light, which, when combined, creates the perception of white light. Thandi compared the research process to cooking, explaining how the preparation of phosphors resembles food preparation. She believes that relatable language, analogies, and storytelling are important tools in science communication.

Thandi says that this competition was a valuable platform to improve her science communication skills. “It is an interesting challenge to explain your work in 180 seconds to an audience with different backgrounds,” she said, adding that she is excited to represent the UFS at the national competition.

The other winners

Each department hosts its own 3MT competition, and the winners and runners-up in both the master’s and PhD categories then represent their faculty in the institutional competition.

The master’s category winners from other faculties were:

  • Faculty of Economic and Management Sciences: Evodia Mohoanyane with Does SI/tutoring work and what about it works? Evodia was also the overall winner in the institutional competition in the master’s category.
  • The Humanities: Yonwaba Matshobotiyana with Of Speaking and Visibility: Black Women Poets' Voices in South Africa
  • Health Sciences: Viwe Fokazi with Establishing a novel 3D doxorubicin-resistant triple-negative breast cancer spheroid model

In the PhD category, the winners were:

  • Economic and Management Sciences: Chrizaan Grobbelaar with The use of gamification to enhance retirement preparedness of millennials
  • The Humanities: Sheree Pretorius with The Psychometric Properties of the Prison Adjustment Questionnaire (PAQ) among South African Male Incarcerated Offenders

With Thandi, first runner-up of the institutional competition, Chrizaan, participated in the national 3MT competition. Universities such as the Nelson Mandela University, UNISA, University of KwaZulu-Natal, University of the Western Cape, University of Johannesburg, and the Central University of Technology were also present. 

News Archive

Childhood obesity should be curbed early
2017-03-15

Description: Child obesity Tags: Child obesity

Serious intervention by parents is required to deal
with childhood obesity. Prof Louise van den Berg and
a group of final-year PhD students worked on a study
about the prevalence of obesity in six-year-olds in
South Africa.
Photo: Supplied

If your child is overweight when they start school at the age of six, unless you do something about it at that point, the indications are they are going to be overweight teenagers and obese adults. This is according to University of the Free State’s Prof Louise van den Berg.

Evidence has shown that overweight children and teenagers have a greater risk of developing lifestyle diseases such as type 2 diabetes, hypertension and cardiovascular disease later in life, and dying prematurely.

Obesity is a global pandemic rapidly spreading among adults and children, in developed and developing countries alike.

Dr Van den Berg worked with Keagan Di Ascenzo, Maryke Ferreira, Monja-Marie Kok, Anneke Lauwrens, all PhD students with the Department of Nutrition and Dietetics, to conduct the study. Their research found that children who are overweight by the time they turn six should be screened for weight problems.

Why six-year-olds?
Children who are overweight between the ages of two and five are five times more likely to be overweight when they are 12. There are two periods in a normal life cycle when the body makes new fat cells. The first is in the uterus and the second is around the age of six. The second phase lasts from the age of six to puberty.

The study assessed the prevalence of obesity in six-year-olds as part of a campaign in South Africa to raise awareness of the problem among parents and educators.

A total of 99 children were chosen from seven schools in Mangaung, the capital city of Free State. The schools were chosen from quintile four and five schools, which when measured by their own resources and economic circumstances, are well resourced and serve largely middle-class and wealthy communities.

The children’s weight, height and waist circumference were measured and used to calculate a body mass index score and waist-to-height ratio. Both these figures are good predictors for future lifestyle disease risks such as type 2 diabetes, hypertension and cardiovascular disease. A person with a good waist-to-height ratio can wrap a piece of string equal to their height around their waist at least twice.

When the children had a higher body mass index, they also had an increased waist to height ratio. The study found one in four children from the schools surveyed were overweight when they started primary school.

Nipping the fat in the bud
Although there are many factors that play a role in preventing childhood obesity, parents’ perceptions of their children’s weight play an important role. A recent study found that more than 50% of parents underestimate the weight of their obese children. These parents remain unaware of the risks their children face and are not motivated to take any action.

At least half of the parents whose children are overweight struggle to recognise their children’s weight problems fearing that they will be labelled or stigmatised. By the time they turn six overweight children should be referred to dieticians and nutritionists who are qualified to guide their parents in getting them to eat well and be more physically active at pre-primary and primary school.

The high prevalence of weight problems among six-year-olds found in this study is an urgent call to healthcare professionals to step up and empower parents, educators and children with the necessary skills for healthy dietary practices and adequate physical activity.

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