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30 November 2021 | Story Leonie Bolleurs | Photo Supplied
Prof Johan Meyer, Senior Professor in the Department of Mathematics and Applied Mathematics, says he is looking forward to learning from others in the field during this collaboration.

What do trees, black holes, earthquakes, and time structures have in common? 

The answer to this question is that these, in one way or the other, form the focus of some of the abstracts delivered during the Annual Congress of the South African Mathematical Society. The society has as its main objective the advancement of mathematics in South Africa. 

The Department of Mathematics and Applied Mathematics at the University of the Free State (UFS), in conjunction with the South African Mathematical Society (SAMS 2021), is hosting the 64th Annual Congress of the society this week (29 November to 1 December 2021).

Prof Johan Meyer, Senior Professor in the department, says the congress, which is being conducted online, is focusing on all aspects of mathematics research, including history and teaching.

Learning from others in the field

The congress, which aims to share the latest research results in mathematics, will be attended by staff and students from universities across South Africa as well as abroad. “Anyone from the public is, of course, welcome to attend or even share their results if they are also involved in mathematics research,” adds Prof Meyer. 

He says that he is looking forward to learning from others in the field during this collaboration. 

The congress will include discussions on more than 120 abstracts, covering category theory, algebra, topology, logic; functional analysis and operator theory; finite groups and combinatorial structures; graph theory and combinatorics; lie symmetries and nonlinear differential equations; and applied and numerical mathematics.

Array of interesting topics presented

“It is important in many areas of science and engineering to predict and to simulate rare, random events, the occurrence of which may have negative or even catastrophic consequences. Examples include internet server overflows, mechanical breakdowns, floods, and financial crashes. Rare events can also have a positive effect, triggering for example chemical reactions or driving genetic evolution via random mutations.” Prof Hugo Touchette from Stellenbosch University will be shedding some light on this interesting topic in his presentation on Predicting and simulating rare events.

Prof Jeandrew Brink, Associate Professor in the Department of Mathematics and Applied Mathematics at the UFS, is presenting a plenary session on the topic Determining the geometry of strong field space-times in spite of tacitly assuming the answer during every measurement. In South Africa, state-of-the art pulsar timing data from the MeerKAT telescope will make a considerable contribution to conducting GR orbital tests. Prof Brink comments on how pulsar timing tests differ from tests using gravitational wave detectors, as well as what we can learn from the framework already employed to perform pulsar timing measurements.

News Archive

Photo manipulation in journalism: evil, crutch or lifebuoy?
2017-09-04

Description: Albe Grobbelaar Tags: Photo manipulation, Albe Grobbelaar, Albe, OJ Simpson, journalism, Department of Communication Science, Communication Science   

Albe Grobbelaar, veteran journalist and lecturer in the
Department of Communication Science at the UFS.
Photo: Rulanzen Martin


Since the 1800s the manipulation of photographs has been common practice, and who can forget the OJ Simpson Time magazine cover in 1994? Albe Grobbelaar, lecturer in the Department of Communication Science at the University of the Free State (UFS), asked in a special lecture on 18 August 2017 whether “Photo manipulation in Journalism” was an evil habit, a crutch or a lifebuoy.

“As a journalist I have always been interested in photography. And the principle of photo manipulation or tampering with photos, as we call it, is something that has interested me ever since,” Grobbelaar said. Photo manipulation is an area that has garnered many academic interest and is not a new trend but a practice that started in the 1830s when photos came into popular use. “It is not always done with ulterior motives, artists played with photographs to get unique effects.” Photo manipulation is not only to create fake news, but is sometimes used to convey novelty and create shock to news readers. 

Different viewpoints for different circumstances
He talked about the spectrum of viewpoints on photo manipulation. Some conservative journalism schools say photos should never be retouched while other feel it is fine to tamper with pictures. “What I tried to convey in the lecture was that one should consider different circumstances differently,” Grobbelaar said. As a journalist he believes that news photos should never be manipulated.

He mentioned the example of the mugshot of OJ Simpson that the Los Angeles Police Department released to the media. “Newsweek and Time both used the photo on their front pages, but Time deliberately darkened the picture so that OJ, a black man, would appear more sinister,” Grobbelaar said. It is, however, common practice in the fashion industry to retouch images that are used in fashion magazines. 

Use own judgment to validate photos
In the age of social media it has become easy to manipulate photos and which has been labelled fake news. “I would advise people to use their own judgment when validating the authenticity of photos,” Grobbelaar said. It is important to verify whether they are from a reliable news outlet.

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