In this paper we consider the problem of "nding the e$cient frontier associated with the standard mean}variance portfolio optimisation model. We extend the standard model to include cardinalityâ€¦ (More)

In this paper we consider the problem of scheduling aircraft (plane) landings at an airport. This problem is one of deciding a landing time for each plane such that each plane lands within aâ€¦ (More)

In this paper we define a generic decision problem â€” the displacement problem. The displacement problem arises when we have to make a sequence of decisions and each new decision that must be made hasâ€¦ (More)

The Capacitated Shortest Spanning Tree Problem consists of determining a shortest spanning tree in a vertex weighted graph such that the weight of every subtree linked to the root by an edge does notâ€¦ (More)

Background:Tumour gene expression analysis is useful in predicting adjuvant chemotherapy benefit in early breast cancer patients. This study aims to examine the implications of routine Oncotype DXâ€¦ (More)

and octagonal neighborhoods leading to the city-block, chessboard, and octagonal distances, respectively. The unit In this paper, we extend some results in discrete geometry based on theâ€¦ (More)

We present a novel graph-theoretic approach to the Distance Transformation (DT) problem. The binary digital image is considered as a graph and the DT problem reduces to a shortest path forestâ€¦ (More)