The average life span of knee prosthesis used in Total Knee Replacement (TKR) is approximately 10 to 15 years. Literature indicates that the reasons for implant failures include wear, infection, instability, and stiffness. However, the majority of failures are due to wear and tear of the prosthesis. The most common biopolymer used in TKR  is Ultra High Molecular Weight Polyethylene (UHMWPE). Pr...

In a real planning problem, there exists a set of constraints (both temporal constraints and resource usage constraints) which must be satisfied in order to obtain a feasible plan. This requires a scheduling process (after the planning process) which should guarantee the availability of resources and the satisfiability of all the problem constraints. Several approaches have been proposed to dea...

environmental impact assessment (eia) reports of projects in different development sectors in sudan (agriculture, roads and highways, power generation, oil production, river engineering projects) were analyzed to investigate how these studies corresponded with the local, regional, international and good practice requirements. the results of the analysis illustrated some variations in the practi...

In this paper, traditional process design rules for deep drawing of box shapes are used to develop constraints within a dynamic programming (DP) approach to generate a set of alternative optimized process plans that minimize the number of drawing stages and heat treatments. The DP approach is capable of scanning a wide range of different alternative values for process parameters which allows fo...

In this paper we present our ongoing research project GAPO (Genetic Algorithm Process Optimization) that focuses on the development of an optimization module for process plans. GAPO is part of a 4D-Toolbox that conflates different modules for the 4D planning of construction projects. Among other modules, the 4D-Toolbox consists of a DES (Discrete Event Simulator) that automatically sequences ac...