Parts of the Local Access Telecommunication Network planning problem may be modelled as an Extended Tree Knapsack Problem. The Local Access Telecommunication Network can contribute up to 60% of the total network costs. This paper presents partitioning algorithms that use standard off-the-shelf software coupled with enhanced modelling. Enhancements to the algorithms and empirical results for both the Tree Knapsack Problem and Extended Tree Knapsack Problem are presented.

We present a case of a 2-year-old child who fell and injured his elbow. Plain films were taken and had the appearance of an elbow dislocation (Fig. 1). Subsequent MRI confirmed a Salter Harris I fracture of the distal humeral epiphysis (Figs 2a & b).