2011-NMMU-Research-Report - Research Management - Nelson ...
2011-NMMU-Research-Report - Research Management - Nelson ...
2011-NMMU-Research-Report - Research Management - Nelson ...
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Profiled below are five postdoctoral fellows:<br />
Dr Craig Tambling<br />
Dr Craig Tambling is a NRF funded postdoctoral fellow currently<br />
working in the Centre for African Conservation Ecology (ACE), based<br />
in the Zoology Department. He is predominantly based in the Addo<br />
Elephant National Park, continuing long-term predator-prey research<br />
in collaboration with the SANParks. Dr Tambling’s past research<br />
has revealed that buffalo have altered their behaviour to increase<br />
their ability to defend juveniles within herds. The Addo buffalo have<br />
amalgamated into larger breeding herds and now use open landscapes<br />
during dangerous times when lions are known to be most active. As a<br />
consequence lion predation on buffalo has declined significantly since<br />
the lion reintroduction in 2003.<br />
Dr Tambling’s current research projects include investigating the<br />
impact that large predators have on prey species; and models for<br />
large carnivore reintroductions into small-medium sized reserves.<br />
Dr Tambling is also involved in collaborative research with the<br />
Endangered Wildlife Trust (EWT) cheetah metapopulation project<br />
and with researchers from North Carolina State University (USA),<br />
and Queens University in Belfast (Nothern Ireland) investigating<br />
cheetah foraging ecology. He also collaborates with researchers<br />
from George Mason University in Virginia (USA) and Lincoln Park<br />
Zoo in Chicago (USA), investigating the temporal responses of prey<br />
species to predator presence.<br />
Dr Surekha Krishnan<br />
Dr Surekha Krishnan with Ms Esther Akinlabi.<br />
53<br />
During her tenure, Dr Surekha Krishnan was mainly involved in two<br />
projects related to friction stir processing (FSP) / welding (FSW).<br />
The first focused on investigating the cryogenic treatment to<br />
improve wear properties of AISA H13 tool steel. This study aimed<br />
at comparing the wear behaviour of AISI H13 tool steel and Bohler<br />
K390 P/M steel (9% v) before and after cryogenic treatment. The<br />
second project focused on the improvement of corrosion resistance<br />
of pure copper for intrauterine devices.<br />
Copper-containing IUDs are increasingly being used as an effective<br />
contraceptive. However, there appears to be several problems with<br />
coarse grained copper, such as the side effects from burst release of<br />
cupric ion during the first one to two months of implantation, low<br />
transfer efficiency of cupric ion from copper element and corrosion<br />
breakage. Despite great efforts to solve these problems, the burst<br />
release of cupric ion in the uterine environment is still an issue for<br />
immediate attention. This project aimed to produce fine grained<br />
copper with better bio-compatibility. Besides her involvement in the<br />
above projects, Dr Krishnan also gave expertise technical guidance<br />
to Doctoral student, Esther Akinlabi (who graduated in April <strong>2011</strong>)<br />
and Masters student, Victor Ngea. She also published two articles<br />
on FSW.