ASOR Seminar Schedule

Updated 19 October 2020

By video conference (VC) - Series Two starts 5 November 2020. VC details to be provided via the ASOR mailing list each week.

ASOR holds a national seminar series for OR and data science topics on Thursday afternoons at 4.30pm. The seminars are around 30 minutes in duration. We have chosen this duration and time of day so that you can get a bite-sized fix of OR before going home at the end of the standard working day, or after school pickup but before dinner, or else for a stimulating pause within whatever else characterises your world at this unusual time. We will be recording these sessions with the presenters' permission (note that it can take us a few weeks to edit and approve the recordings).

SERIES TWO

5 November 2020
Lessons learnt from COVID-19 surge modelling for the Australian Royal Flying Doctor Service
Hannah Johns (Florey Institute / U. Melbourne)

12 November 2020
Resources and methods for fire risk analysis
Simon Dunstall (CSIRO Data61)

19 November 2020
Gurobi v9.1 (releasing this week!) capabilities, new features and performance
Sebastian Thomas, Account Director – Oceania and Southeast Asia, Gurobi Optimization, LLC
and Kostja Siefen, Technical Account Manager, Gurobi

3 December 2020
A matheuristic solution approach for the p-hub center and routing problem over incomplete hub networks
Zühal Kartal, Eskisehir Technical University, Turkey

10 December 2020
A Mathematical Modelling Approach for Managing Sudden Risk in Supply Chain
Sanjoy Paul, University of Technology Sydney, and 2018 ASOR Rising Star Award Recipient

SERIES ONE

25 June 2020
Predicting solutions of large-scale optimization problems via machine learning: A case study in blood supply chain management
Zahra Hosseinifard (Lecturer of Operations Management, Faculty of Business and Economics at The University of Melbourne)
- Zahra will be talking us through her recently-published co-authored paper in Computers & Operations Research.

2 July 2020
Simulating the spread of COVID-19
-- Recorded presentation is hosted on vimeo at https://vimeo.com/437015924

Phil Kilby (Principal Research Scientist, CSIRO Data61)
- Phil is part of a team based in CSIRO and Department of Health which is looking at the dynamics of COVID-19 outbreaks and our response to keeping these outbreaks under control.

9 July 2020
Big Data Analytics and Machine Learning for Smart Cities
-- Recorded presentation is hosted on vimeo at https://vimeo.com/437779815
Peter Ryan (Honorary Research Fellow, Defence Science & Technology Group) and Richard Watson (Research Scientist)
- Peter, Richard and colleagues have been looking at the application of analytics to cities, with an emphasis on open data sets provided by City of Melbourne.

16 July 2020
An Application of Business Rule Optimisation
-- Recorded presentation is hosted on vimeo at https://vimeo.com/442309070
Alan Dormer (Opturion P/L and Monash University)
- Alan's recently awarded PhD is on the optimal choice of business rules for recurring decisions in domains such as customer service, finance and health.

23 July 2020
Performance analysis and feasibility of hybrid ground source heat pump systems in fourteen cities
-- Recorded presentation is hosted on vimeo at https://vimeo.com/517666880
Hansani Weeratunge (U. Melbourne)
- Hansani has recently completed a PhD applying simulation and optimisation to the design and operation of energy-efficient building heating and cooling systems based on ground-source heat pumps.

30 July 2020
Hyper-heuristic for Combinatorial Optimisation Problems
-- Recorded presentation is hosted on vimeo at https://vimeo.com/517667192

Ayad Turky (Victoria University)
- Hyper-heuristic (HH) is a high-level search methodology that searches for problem solving methods, rather than problem solutions, and can be succesfully applied in resource allocation, scheduling, routing, production planning and economic systems.

6 August 2020
Multiperiod storage system modelling in the context of nonlinear power network optimisation
-- Recorded presentation is hosted on vimeo at https://vimeo.com/517667505
Frederik Geth (Research Scientist, CSIRO Energy)
- Combining multiperiod storage models and power flow physics results in large nonlinear optimisation problems. The talk discusses the application of recent reformulation techniques and implementation aspects in Julia/JuMP/PowerModels.

13 August 2020
A decomposition framework for capacity expansion planning with unit commitment
-- Recorded presentation is hosted on vimeo at https://vimeo.com/517667756
Semini Wijekoon (Monash University)
- Development of an approach for solving electricity network design problems that is derived from scenario decomposition (SD) techniques.

20 August 2020
An OR fireside chat
Open discussion

27 August 2020
The use of the Sports Synthesis model to determine appropriate draft penalties in an AFL-like sports league
-- Recorded presentation is hosted on vimeo at https://vimeo.com/517668131
Geoff Tuck (CSIRO Oceans and Atmosphere, Hobart)
- Geoff will describe how a simulation model can be used to quantify the impact on success of alternative draft penalties for a club that has breached league regulations – and how this relates to fishing.

3 September 2020
Simulation-based optimization in fleet management
Hasan Turan (UNSW/ADFA)

10 September 2020
Online Incentive-Compatible Mechanisms for Traffic Intersection Auctions
David Rey (UNSW, Research Centre for Integrated Transport Innovation)

23-25 September 2020
Asia-Pacific Operations Research Societies (APORS) Virtual Conference
Online from international venues - see IFORS website for registration

 


Sci+Tech in the City - suspended due COVID-19

Sci+Tech in the City is held Fortnightly on Thursdays 5pm to 6.30pm in the Data61 Demonstration Lab, 710 Collins St, Docklands, Melbourne. Sci+Tech in the City is co-presented by ASOR, CSIRO Data61, RiskLab Australia and CSIRO Alumni.


Details of Past ASOR Seminars

2 June 2017 - Nicholas Davey

The ASOR Melbourne AGM on 2 June 2017 was preceded by a seminar Optimal road design through ecologically sensitive areas considering animal migration dynamics delivered by Nicholas Davey (University of Melbourne).

30 September 2015 - Andreas Ernst

A retrospective of over two decades of Operations Research at CSIRO

Abstract: The Operations Research group at CSIRO was formed in the early 1990s and since then has been a significant part of the OR scene in Australia. With the departure of a number of key members of the group and the imminent merger between NICTA and the CSIRO, the OR group will cease to exist in its current form. This talk will look back over the past 20 years at some of the highlights of what has been achieved by the group. This includes discussion of how a small project for Australia Post inspired a stream of research into hub location problems; the development of rostering optimisation methods and the challenges of commercialising it; and the range of interesting OR problems in bulk material (mining) supply chains. The talk will also be used to comment on the developments in OR in Australia more widely and the likely trends into the future.

23 September 2015 - Asef Nazari

Expansions on Land-use Trade-off Optimisation (LUTO)

Abstract: CSIRO has previously developed a model of land-use trade-offs that considers the possible evolution of agricultural land areas in Australia over the next 40 years. This can be modelled as a large scale multi-stage linear programming problem. However, acquiring the expected outcome requires solving the large scale LP problem which takes more than one hour to solve for a single year. In this regard, we developed a combination of aggregation-disaggregation technique with the concept of column generation to solve the large scale LP problem originating from land use management in the Australian agricultural sector in a shorter amount of CPU time. In addition, increasing  demand for greener energy alternatives are putting more pressure on the use of agricultural land for not just food productions but also biofuels, carbon sequestration, biodiversity and other non-traditional uses. A key question is how this is going to impact not only the land use but also the agricultural supply chains that process the outputs of the land use. In this talk we also initiate the question of locations of processing centres and land use in an integrated optimisation model. Here we consider in addition the construction of some processing centres for bio-fuel, bio-energy, livestock facilities and so forth, which introduces a new combinatorial aspect to the model. The decisions of land use and the location of processing centres are interlinked as transport costs based on distances are often instrumental in determining the economic viability of some of the land uses and conversely economies of scale are necessary to justify investment in processing plants. We introduce a model containing both problems of a land allocation and a facility location simultaneously which results in a large scale mixed integer linear programming (MILP) problem and therefore is computationally difficult to solve, and we will cover some of the computational difficulties.
 
Biographical Info: Asef was awarded his PhD in 2009 on the topic of developing derivative free algorithms for non-smooth optimisation problems from the University of Ballarat. Immediately after his PhD, he was appointed as a research associate at the UniSA to conduct research on the optimal expansion of a power system. Since 2013 he has been employed by CSIRO to be involved in several industrial projects

2 September 2015 - Kristian Rotaru

3.30pm, Room 7.84, Building H, Monash Caulfield

Risk information processing and decision-making with strategic performance measurement systems: an eye-tracking study

To address the limitations of the traditional strategic performance measurement systems (SPMSs) in visualizing risk and preventing excessive managerial risk-taking, a number of research studies proposed to extend the functionality of SPMSs by incorporating risk information into traditional SPMSs, such as balanced scorecards. Thus, despite the growing calls of practitioners and researchers on combining performance and risk measures as part of an extended framework, there is a lack of uniform vision about what constitutes such a framework. The aim of this study is to investigate how the representation of risk-related information (characteristics of risk events and key risk indicators) in SPMSs influences the identification and processing of this information in managerial risky decision making. This study benefits from the use of eye-tracking methodology in a laboratory experiment, which allowed to acquire better understanding of the cognitive processes and the subsequent behavioural response associated with managerial risky decision-making when using SPMSs as a tool for decision support.

Dr Kristian Rotaru (PhD in Economics, PhD in Information Systems/Risk Management) works in the domains of risk modelling and decision making. He is a Member of the Editorial Review Board of the Journal of Operations Management. At Monash Business School, Kristian leads the Risk Analysis, Judgement and Decision-Making cross-disciplinary research team that focuses on integration of normative research informed by analytical and simulation modelling methods and descriptive research, informed by laboratory and field experiments. In his research he adopts a variety of research methods, including market data analysis, conceptual, analytical and simulation modelling and laboratory experiments (involving the use of eye-tracking and electroencephalography technology). Kristian lectures Business Analytics, Accounting Information Systems and Financial Modelling units.

19 August 2015 - 2pm - Carleton Coffrin (NICTA)

Carleton gave us an entertaining and insightful presentation about solving the Optimal Power Flow (OPF) problem for AC electrical power networks. In OPF decisions are made about the amount of electricity generation undertaken at generation nodes in a network, so that demand is fulfilled at a series of demand nodes - subject to the non-linear and non-convex constraints relating to AC power flow in transmission networks. There are successive relaxations to the full problem: via semi-definite programming, conical programming, a transport model, and finally a "copper sheet" model without transmission line flow limits. On standard sets of test instances the strongest two relaxations displayed remarkable performance, i.e., finding optimal every time... but further investigation showed that these standard instances were in fact too easy to solve to global optimality, because the data was such that certain sets of constraints would never be active. This led to the development of better benchmark datasets which have proven far more interesting to solve and which are true tests of algorithms for Optimal Power Flow.