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15 October 2020 | Story Leonie Bolleurs | Photo Jolandi Griesel
Dr Michael von Maltitz embraces the possibilities that the internet provides for education. He wants his students to be comfortable evaluating and using information from the internet to solve their problems.

“My research in teaching and learning is driven mostly by curiosity – when I feel something is not working in a class, I look for alternatives and I am quick to adopt something new.”

This is how Dr Michael von Maltitz approaches his research. This perspective on things is also what brought him an award from the Centre for Teaching and Learning (CTL) during the Annual UFS Excellence in Learning and Teaching Conference 2020 that was held on 21 and 22 September 2020. 

Dr Von Maltitz, who is Programme Director and Senior Lecturer in the Department of Mathematical Statistics and Actuarial Science, received an Excellence in Learning and Teaching award in the category Technology Enhanced Learning. 

He teaches Causal Inference and Generalised Linear Models for third-year Mathematical Statistics students, and Sampling Distribution Theory for second-year Mathematical Statistics students. 

Follow the lead of practice

Grabbing the attention of the judges, he believes, was his passion for new teaching and learning methods. He is also of the opinion that it is important to embrace the information – the incredible amount of free, valuable content online – that is freely available to staff and students all the time.

“I am passionate about the fact that we need to stop asking our students to write tests when this is not done in that student’s industry. At university, we need to assess knowledge in the same way it is assessed in practice. This ultimately means that information capturing (which is what we expect from students in a textbook-to-test format) should be left to machines and the internet. Critical thinking, knowledge valuation, and self-assessment (i.e. facets of learning how to learn) should be developed while at university.”

“The internet is everywhere now, and we’re fooling ourselves if we think we can teach our students how to navigate their futures without incorporating the internet into our teachings,” he adds.

Dr Von Maltitz embraces the possibilities that the internet provides. “Hopefully, when my students are finished with my modules, they will be more comfortable evaluating and using information from the internet to solve their problems, like I do on a day-to-day basis,” he says. 

Seeking new methods

On receiving this award, Dr Von Maltitz voiced his gratitude for the opportunity to present his ideas and practices; “it suggests that others might find my work useful”.

He says that it helps him feel justified in trying new methods in teaching and learning every year.

Dr Von Maltitz has big plans for the next five years. He wants to make it to Associate Professor, partially on the strength of his teaching and learning portfolio.

“My goal is to ensure that my gradual exploration of my research field in Mathematical Statistics always raises the impact of my modules for my students and improves the quality and quantity of my postgraduate supervision. I also hope that my teaching and learning research will continue to improve my ability to transform my students into life-long learners.”


News Archive

Research helps farmers save with irrigation
2017-02-15

Description: Irrigation research Tags: Irrigation research

Marcill Venter, lecturer in the Department of
Agricultural Economics at the University of the
Free State, has developed the mathematical
programming system, Soil Water Irrigation
Planning and Energy Management in order to
determine irrigation pump hours.
Photo: Rulanzen Martin

Her advice to farmers is that they should make sure they are aware of the total cost (investment and operating costs) of an irrigation system. In most cases the investment cost is low, but the operating cost over the lifetime of the system is high.

“It is very important to have a look at the total cost and to install the most economic system,” says Marcill Venter, lecturer at the University of the Free State (UFS), who has done research on the economic sustainability of water-pipe systems.

Irrigation systems important components for farming
This research comes at a time when many farmers are relying on their irrigation systems due to persistent drought and low rainfall during 2016. South Africa has also experienced an abnormal increase in electricity tariffs in recent years. Due to tariff increases which threaten the future profitability of irrigation producers, the Water Research Commission (WRC) has launched and financed a project on the sustainable management of irrigation farming systems. “I had the opportunity to work on the project as a researcher,” says Venter.

The heart of every irrigation system is the water pipes that bring life to crops and livestock, and this is what Venter’s research is about. “Water pipes are part of the whole design of irrigation systems. The design of the system impact certain factors which determine the investment and operating costs,” she says.

Mathematical system to help farmers
Venter and Professor Bennie Grové, also from the Department of Agricultural Economics at the UFS, designed the Soil Water Irrigation Planning and Energy Management (SWIP-E) programming model as part of the WRC’s project, as well as for her master’s degree. “The model determines irrigation pump hours through a daily groundwater budget, while also taking into account the time-of-use electricity tariff structure and change in kilowatt requirements arising from the main-line design,” says Venter. The model is a non-linear programming model programmed in General Algebraic Modeling System (GAMS).

Design of irrigation system important for sustainability

The main outcome of the study is that the time-of-use electricity tariff structure (Ruraflex) is always more profitable than the flat-rate structure (Landrate). The interaction between the management and design of a system is crucial, as it determines the investment and operating costs. Irrigation designers should take the investment and operating cost of a system into account during the design process. The standards set by the South African Irrigation Institute (SAII) should also be controlled and revised.

Water-pipe thickness plays major role in cost cuts
There is interaction between water-pipe thickness, investment and operating costs. When thinner water pipes are installed, it increases the friction in the system as well as the kilowatt usage. A high kilowatt increases the operating cost, but the use of thinner water pipes lowers the investment cost. Thicker water pipes therefore lower the friction and the kilowatt requirements, which leads to lower operating costs, but thicker pipes have a higher investment cost. “It is thus crucial to look at the total cost (operating and investment cost) when investing in a new system. Farmers should invest in the system with the lowest total cost,” says Venter.

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