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09 July 2021 | Story Dr Nitha Ramnath

Prof Francis Petersen, Rector and Vice-Chancellor of the University of Free State, South Africa, invites us to rethink our relationship with the world in a series of ‘Courageous Conversations’ on the theme of ‘The Global Citizen’. Prof Petersen argues that COVID-19 has been a powerful ‘disruptor’ – it was a stark reminder of the need to rethink our identity, of where we belong, our ‘normative’ view of citizenship – if we want to secure long-term survival of our civilisation and the environments that support it.

Global citizenship and the Sustainable Development Goals – 30 July 2021, 13:00 SAST

Join us for the next Courageous Conversation in the Global Citizen series when Prof Petersen will welcome eminent economist, professor at Columbia University, Director of its Earth Institute, and global leader on sustainability, Prof Jeff Sachs.
 
In 2015, almost all countries signed up to the UN Sustainable Development Goals (SDG). This commitment marked an international solidarity of virtually all countries to work towards the betterment and development of every person on earth. Then COVID-19 struck. Not only did the crisis result in a retrogression of successes registered in achieving the SDG, most notably in the reduction of global poverty, but it also exposed global power disparities.
 
In this session, Prof Sachs will discuss global citizenship and the SDGs in the context of recovery from the COVID-19 pandemic, including what an equitable recovery would mean for countries around the world, and will make reference to the 75th anniversary of the Universal Declaration of Human Rights.

Click Here to RSVP

 
More about our guest

Prof Sachs is widely recognised for addressing complex global challenges such as debt crises, hyperinflation, the control of AIDS, malaria, poverty, and climate change, among a myriad of others.

Sachs serves as the Director of the Center for Sustainable Development at Columbia University. He is President of the UN Sustainable Development Solutions Network, a commissioner of the UN Broadband Commission for Development, and an SDG advocate for UN Secretary General, Antonio Guterres. From 2001 to 2018, Sachs served as Special Adviser to UN Secretaries-General Kofi Annan (2001-2007), Ban Ki-moon (2008-2016), and António Guterres (2017-2018). 


A world-renowned economics professor, bestselling author, innovative educator, and global leader in sustainable development, Sachs was the co-recipient of the 2015 Blue Planet Prize, the leading global prize for environmental leadership. He has twice been named among Time Magazine’s 100 most influential world leaders and has received 34 honorary degrees. A survey by The Economist ranked Sachs as among the three most influential living economists.
 

The Global Citizen Courageous Conversations series

In partnership with the South African Chamber of Commerce based in the United Kingdom, the Global Citizen Courageous Conversations series that was launched on 26 May 2021, brings together powerful voices from public life, intellectuals, public interest and business leaders, academics, naturalists, religious leaders, astrophysicists, economists, ecologists, and others.

Eminent South African business leader, Prof Bonang Mohale, joined Prof Petersen for our first Courageous Conversation on 17 June 2021 to unwrap the role that universities can play in creating a ‘global citizen’ mindset to effect material change in a constantly evolving and turbulent international world.  

If you missed our previous Global Citizen Courageous Conversations, you can watch the replay on YouTube, or visit the South African Chamber of Commerce website for the recordings. 



News Archive

UFS researcher engineers metal surfaces
2015-03-03

Shaun Cronjé, a PhD student, in a surface characterisation laboratory at the UFS.

It is well known that the surface of a component is much more vulnerable to damage than the interior, and that surface-originated degradation such as wear, corrosion, and fracture will eventually destroy the component.

“Engineering the surface, based on scientific knowledge, is essential to control these damaging processes. It also creates electronic and geometric structures on the surface which opens up a world of new devices, especially considering the properties on the nano-length scale,” said Prof Wiets Roos from the Department of Physics at the University of the Free State (UFS).

At elevated temperatures, atoms are more mobile and can migrate to grain boundaries and surfaces, which have a major influence on material properties. The redistribution of solute atoms between the surface and the bulk of the material is known as segregation. Knowing the behaviour of segregation at the surface/environment interface can be very useful in the development of new materials. As an example materials can be improved higher efficiency and lower fuel consumption, thus reducing environmental pollution.

The main aims of Prof Roos’s research are to understand surface segregation, use it as a tool, and contribute to the various surface engineering fields.

The surface characterisation laboratories at the UFS are well equipped to do high temperature segregation measurements, and have already proven a success, not only in the ability to prepare the specimens for characterisation, but also in developing models and procedures to quantify the segregation parameters.

The most recent results have demonstrated the importance of taking evaporation into account during quantification.” This has laid the foundation for future studies by installing the necessary hardware in a surface characterisation spectrometer, establishing experimental protocols, and improving an existing model (developed in this laboratory) for simulating segregation profiles,” said Prof Roos.

Segregation parameters allow the researcher to predict and utilise the surface concentration behaviour as a function of temperature and time. “This not only contributes to fields involving corrosion, oxidation, sintering, wear, chemical poisoning, powder metallurgy, and lubrication but adds to the development of self-healing devices,” said Prof Roos.

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