# Australasian Journal of Engineering Education

## Articles from Vol. 15, No. 2, October

A Non-Linear Dynamical System: Flow Past a Sluice Gate
1 INTRODUCTION There are many examples throughout the world where infrastructure such as dams, weirs and sluice gates play an important role in controlling the flow of water in rivers and irrigation channels. More specifically, in Australia, the...
Application of Origin-Destination Matrices to the Design of Train Services
1 INTRODUCTION An important element in creating a train timetable is the design of train services to meet a known travel demand within some fixed time interval. Demand is defined by the number of people who wish to travel between each pair of stations....
Critical Times in One- and Two-Layered Diffusion
1 INTRODUCTION An important consideration in applications modelled by diffusion is: how long does the diffusive process take? For example, in steel annealing (Barry &amp; Sweatman, 2009; McGuinness et al, 2009; Yuen, 1994), a steel coil is heated...
Diffusing Populations: Ghosts or Folks?
1 INTRODUCTION In a random walk model (Hughes, 1995; Berg, 1983), an agent moves in a sequence of random steps. Such models are easy to simulate and well-suited to student projects. Students can learn important ideas in a highly intuitive context,...
Modelling Sediment Drainage from Roads to Rivers
Rainfall on unsealed roads causes a sediment flux that proceeds along the road, through drains, and then down to river systems. Optimal placement of drains can minimise the amount of sediment polluting the river. Two methods of minimising this...
Piped Water Cooling of Concrete: An Exercise in Scaling
1 INTRODUCTION During dam construction, concrete is poured in large slabs that typically have dimensions of the order of 3 x 10 x 10 m. Hydration heat is released as the concrete sets and temperature rises in excess of 50 [degrees] are quite typical....
Ship Stability and Parametric Rolling
1 INTRODUCTION The stability of ships is of vital importance to the maritime world, and for a variety of reasons is likely to become even more important in the future. For example, ships in general are becoming ever larger, and a growing number...
Taming the Complexity of Granular Materials with Vector Calculus
1 INTRODUCTION This paper concerns the mathematical modelling of the deformation of granular materials. It showcases modern applications of undergraduate-level vector calculus in the context of evolving vector fields--specifically, the study of...
Tissue Growth and the Polya Distribution
1 INTRODUCTION Hirschsprung's disease is relatively common, affecting roughly one in 5000 new-born babies each year in Australia. In Hirschsprung's disease there is no nervous system in the last part of the gut, which means that it cannot support...