Solving a Real-Life Distributor's Pallet Loading Problem

We consider the distributor's pallet loading problem where a set of different boxes are packed on the smallest number of pallets by satisfying a given set of constraints. In particular, we refer to a real-life environment where each pallet is loaded with a set of layers made of boxes, and both a stability constraint and a compression constraint must be respected. The stability requirement imposes the following: (a) to load at level k+1 a layer with total area (i.e., the sum of the bottom faces' area of the boxes present in the layer) not exceeding α times the area of the layer of level k (where α≥1), and (b) to limit with a given threshold the difference between the highest and the lowest box of a layer. The compression constraint defines the maximum weight that each layer k can sustain; hence, the total weight of the layers loaded over k must not exceed that value. Some stability and compression constraints are considered in other works, but to our knowledge, none are defined as faced in a real-life problem. We present a matheuristic approach which works in two phases. In the first, a number of layers are defined using classical 2D bin packing algorithms, applied to a smart selection of boxes. In the second phase, the layers are packed on the minimum number of pallets by means of a specialized MILP model solved with Gurobi. Computational experiments on real-life instances are used to assess the effectiveness of the algorithm

Semantic discovery and reuse of business process patterns

Patterns currently play an important role in modern information systems (IS) development and their use has mainly been restricted to the design and implementation phases of the development lifecycle. Given the increasing significance of business modelling in IS development, patterns have the potential of providing a viable solution for promoting reusability of recurrent generalized models in the very early stages of development. As a statement of research-in-progress this paper focuses on business process patterns and proposes an initial methodological framework for the discovery and reuse of business process patterns within the IS development lifecycle. The framework borrows ideas from the domain engineering literature and proposes the use of semantics to drive both the discovery of patterns as well as their reuse

Feasibility Study: Development and Demonstration of Virtual Reality Simulation Training for the BHPB Olympic Dam Site Inductions

This report presents the findings of the project ―Feasibility Study: Development and Demonstration of Virtual Reality Simulation Training for the BHPB Olympic Dam Site Inductions.‖ The project was a collaborative exercise between the University of New South Wales (UNSW) - School of Mining Engineering, the University of Adelaide - Australian Centre for Visual Technologies, BHPB Olympic Dam Expansion, RESA, TAFESA and Skills DMC. The project Chief Investigators were Dr Phillip Stothard (UNSW) and Prof Anton van den Hengel (University of Adelaide).The project was a pilot study research project that looked into the feasibility of developing interactive virtual reality simulations for mine site inductions in the hard rock industry. Many simulations have been successfully implemented into the coal industry and the aim was to build a pilot module that looked at a high risk environment on a surface mine that would also have application to the wider construction industry and other heavy industries. The project collaborators came together as a group of parties interested in virtual reality simulation. The research and development was led by UNSW and University of Adelaide. Invaluable input was provided by the collaborators. The project had a value of $431, 306. Of which$208,563 was in cash and $222,743 was in kind. The budget was fully expended during the course of the project. The subject area of the project was ̳Working at Heights‘ and this was chosen because it is a high risk area. Substantial documentation, mining industry input and effort was placed on building the five sub-modules that form the Working at Heights module. The outcome is a high quality visualisation of an area of the Olympic Dam Mine Site. This high quality visualisation is enhanced by the inclusion of interaction within the module that requires the user to interrogate data within the site and to assess and understand issues that arise when working at heights in relation ladders, scaffolding, open excavations and elevated work platforms. Much project emphasis and time was placed on producing the 3D model. Also, as much information as possible was placed into the module itself as this was to be a pilot example to show to the Olympic Dam Expansion Project Team. The module allows users to interact with Safety Documentation and equipment and procedures that they would encounter on sit

Ordering Networks: Motorways and the Work of Managing Disruption

This thesis contributes to a new understanding of the motorway network and its traffic movements as a problem of practical accomplishment. It is based on a detailed ethnomethodological study of incident management in the Highways Agency’s motorway control room, which observes the methods operators use to detect, diagnose and clear incidents to accomplish safe and reliable traffic. Its main concern is how millions of vehicles can depend on the motorway network to fulfil obligations for travel when it is constantly compromised by disruption from congestion, road accidents and vehicle breakdowns. It argues that transport geography and new mobilities research have overlooked questions of practical accomplishment; they tend to treat movement as an inevitable demand, producing fixed technical solutions to optimise it, or a self-evident phenomenon, made meaningful only through the intensely human experience of mobility. In response, the frame of practical accomplishment is developed to analyse the ways in which traffic is ongoingly organised through the situated and contingent practices that take place in the control room. The point is that traffic does not move by magic; it has to be planned for, produced and persistently worked at. This is coupled with an understanding of network topology that reconsiders the motorway network as always in process by virtue of the materially heterogeneous relations it keeps, drawing attention to the intensely collaborative nature of work between operators and technology that permits the management of disruption at-a-distance and in real time. This work is by no means straightforward – the actions of monitoring, detecting, diagnosing and classifying incidents and managing traffic are revealed to be complexly situated and prone to uncertainty, requiring constant ordering work to accomplish them. In conclusion, this thesis argues for the frame of practical accomplishment to be taken seriously, rendering the work of transport networks available for sustained analysis

Urban transportation: Perspectives on mobility and choice

A study of urban transportation systems are presented characterized by intensive scrutiny of many ideas, philosophies, and academic perspectives. This report is intended to communicate some dimensions of the urban transportation problem to the general public