April, 2009: On control strategies for co-infection of TB and HIV via mathematical modelling, 33rd South African Symposium for Numerical and Applied Mathematics, Stellenbosch University, Cape town, south Africa.
October, 2008: Mathematical models of TB and HIV co-infection, Research Seminars on Differential equations, Department of Mathematics and Applied Mathematics, Unversity of the Western Cape, Cape Town, South Africa.
November, 2008: On the quakitative analysis of some models TB and HIV co-infection, Research Seminars on Differential equations, Department of Mathematics and Applied Mathematics, Unversity of the Western Cape, Cape Town, South Africa.
September, 2010: A delayed HIV model with behavior change, Greece.
November, 2010: Stability analysis of a delayed HIV model with behavioral change, South African Mathematical Society 53rd Annual Congress, University of Pretoria, South Africa.
March, 2011: Analysis of an HIV model with distributed delay and behavioral change, 35th South African Symposium for Numerical and Applied Mathematics, Stellenbosch University, Cape town, south Africa.
June, 2011: Analysis of an HIV model accounting for behavior change, CIMPA Summer School, African Institute for Mathematical Sciences, Muizenburg, South Africa.
July 2011: Optimal control applied to a mathematical model of HIV-TB co-infection, USA.
September, 2011: The effect of behavior change on an HIV model, Department of Applied Mathematics, Faculty of Mathematical Sciences, University of Khartoum, Suda