For more than 100 years upstreaming has been the dominant raising method for tailings storage facilities in Southern Africa. However, there is a growing view worldwide that inherently less safe centreline or downstream of facilities. Considering 90% 250 plus operational storing Africa are upstream raised and cannot economically be converted to, replaced by, facilities, arguments against were ex...

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In a period where the evolution of the space environment is causing increasing concerns for the future of space exploitation and sustainability, the design for demise philosophy has gained an increased interest. However, satellites designed for demise still have to survive the space environment polluted by space debris. Within this context we are developing a model to evaluate the effect of pre...

This paper suggests an optimization-based methodology for the design of minimum weight structures with kinematic nonlinear behavior. Attention is focused on three-dimensional reticulated structures idealized with beam elements under proportional static loadings. The algorithm used for optimization is based on a classical optimality criterion approach using an active-set strategy for extreme lim...

Recent technological advances have made large displays available on the mass market at affordable prices. We present a set of design criteria that support those who want to exploit such displays effectively to select the relevant content and present it in such a way to take into account the features of the specific devices and the context in which they are used. The discussion is exemplified wi...

By minimizing a cost function consisting of both conventional performance criteria and a measure of aircraft handling qualities, a design with maximum performance for a specified level of handling can be achieved. Handling qualities are measured using a quadratic cost function similar to that used in the design of optimal feedback control systems. This function is proportional to the difference...