A/Prof. Sergei Schreider honoured with a Fellowship of MSSANZ

        The Modelling and Simulation Society of Australia and New Zealand (Inc.) has presented to RMITOpt member, A/Prof Sergei Schreider,  a 2016 Fellowship at MODSIM2017.

Fellows are recognised for their outstanding service to the Society through their unselfish dedication to the aims of the Society as well as for their contributions to modelling and simulation. These are awarded in every even-numbered year.

Congratulations Sergei.

Kate Smith-Miles: Optimization in the Darkness of Uncertainty: when you don’t know what you don’t know, and what you do know isn’t much!

Kate Smith-Miles: Optimization in the Darkness of Uncertainty: when you don’t know what you don’t know, and what you do know isn’t much!

Speaker: Prof. Kate Smith-Miles
University of Melbourne
Title: Optimization in the Darkness of Uncertainty: when you don’t know what you don’t know, and what you do know isn’t much!
Date and time: Monday 6 November 2017, 3:30–4:30pm
Location: Building 8 Level 9 Room 66 (AGR) RMIT City campus

Abstract:
How do we find the optimal solution for a constrained multiobjective optimisation problem when we have no analytical expression for the objective functions, and very limited function evaluations within the huge search space due to the expense of measuring the objective functions? Calculus can’t help you, and trial and error is not an option! This talk will describe a common practical optimisation problem found in many industrial settings with these challenges, and introduce some methods for expensive black-box optimisation. Finally, we will address the question of how best to evaluate the performance of such methods by generating new test instances with controllable characteristics. Read more

Two seminars next week

Dear Optimisation Group Members,

Next week we will have a joint RMITOpt-SPACE seminar on Monday 2 October with a talk by Dr Pierfrancesco Di Cintio and on Tuesday 3 October there will be a CSIT seminar with a talk by Prof. Yuhui Shi.

Students please also note the Data61 6th International Optimisation Summer School (Kioloa, NSW, Australia, January 14th to 19th 2018 ), http://tinyurl.com/optschool. Apply at once to secure a place, applications are processed in order of receipt.

Here is our current schedule

Monday 2 October 3:30pm: Dr Pierfrancesco Di Cintio, Chaos, noise, discreteness effects and the continuum limit in N-body systems, revisited (RMITOpt-SPACE meeting)
Tuesday 3 October, 11:30am, Introduction to Brain Storm Optimization Algorithms (CSIT seminar, RMIT).
Monday 9 October 3:30pm: Dr Elisa Maria Alessi, Passive End-of-Life Solutions for Low Earth Orbits (RMITOpt-SPACE meeting).
Friday 13 October 3:00pm: Prof. Reinout Quispel, Geometric numerical integration: how to discretize differential equations while preserving their physical properties.
Monday 6 November 3:30pm: Prof. Kate Smith-Miles (University of Melbourne).

Warmest regards,
Vera Roshchina.

Joint RMITOpt-SPACE meetings and our schedule for the next week

Dear Optimisation group members,

We have an exciting new development: on 2 and 9 October we will be hosting joint series of talks with SPACE Research Centre. See the information below.

Here is our current schedule.
Monday 18 September 2pm: Reading group on Gröbner bases
Monday 18 September 3:30pm: Computational algebraic geometry with Maple (coordinated by Bill Blyth), AGR 8.9.66
Thursday 21 September 1pm: Dr Stelios Georgiou, New three-level designs for screening in the presence of second order terms (RIMT Statistics and Analytics seminar)
Monday 2 October 3:30pm: Dr Pierfrancesco Di Cintio, Chaos, noise, discreteness effects and the continuum limit in N-body systems, revisited (RMITOpt-SPACE meeting)
Monday 9 October 3:30pm: Dr Elisa Maria Alessi, Passive End-of-Life Solutions for Low Earth Orbits (RMITOpt-SPACE meeting).
Friday 13 October 3:00pm: Prof. Reinout Quispel, Geometric numerical integration: how to discretize differential equations while preserving their physical properties (RMITOpt meeting).
Friday 20th October: Vanessa Teague, TBA (RMIT Information Security seminar)
Monday 6 November 3:30pm: Prof. Kate Smith-Miles, University of Melbourne (RMITOpt meeting).

Most talks held in AGR room 8.9.66 are available via Visimeet/ACE connection.

RMITOpt-SPACE meeting: Dr Elisa Maria Alessi: Passive End-of-Life Solutions for Low Earth Orbits

RMITOpt-SPACE meeting: Dr Elisa Maria Alessi: Passive End-of-Life Solutions  for Low Earth Orbits

Speaker: Dr Elisa Maria Alessi
Istituto di Fisica Applicata “Nello Carrara” (IFAC),
Consiglio Nazionale delle Ricerche (CNR), Italy

Title: Passive End-of-Life Solutions for Low Earth Orbits

Date and time: Monday 9 October 2017, 3:30–4:30pm – note unusual day and time
Location: Building 8 Level 9 Room 66 (AGR) RMIT City campus

Abstract: The growing awareness of the space debris problem has motivated the scientific community to look for effective and feasible active and passive end-of-life disposal solutions for spacecraft orbiting the Earth, in particular the Low Earth Orbit (LEO) region. It is now recognized the idea that the mission design must comprise end-of-life strategies to preserve the space environment and for the sustainability of the whole program. To this end and to make it affordable, it is mandatory to achieve a deep understanding of the dynamics pervading the circumterrestrial space. Starting from an explanatory introduction on the problem and on the worlwide effort, the talk will address the recent advancements obtained in the framework of the ReDSHIFT H2020 project concerning the dynamical mapping of the LEO region, by means of extensive numerical simulations and analytical studies of the resonances due to solar radiation pressure and third-body perturbations. Read more

RMITOpt-SPACE meeting: Dr Pierfrancesco Di Cintio, Chaos, noise, discreteness effects and the continuum limit in N-body systems, revisited

RMITOpt-SPACE meeting: Dr Pierfrancesco Di Cintio, Chaos, noise, discreteness effects and the continuum limit in N-body systems, revisited

Speaker: Dr Pierfrancesco Di Cintio
Institute of Applied Physics of the National Council of Research (IFAC-CNR)
Title: Chaos, noise, discreteness effects and the continuum limit in N-body systems, revisited
Date and time: Monday 2 October 2017, 3:30–4:30pm – note unusual day and time
Location: Building 8 Level 9 Room 66 (AGR) RMIT City campus

Abstract: In this talk I will question the validity of the continuum limit and the use of frozen N-body realizations to obtain qualitative information on particle orbits in large N gravitational system in stellar dynamics. With the aid of detailed numerical simulations with refined symplectic integrators developed in the context of numerical celestial mechanics, I will compare orbits in frozen potentials with orbits in self consistent equilibrium models. In addition, I will show some results that could be relevant for the physics of charged particle beams. Read more

CANCELLED: Reinout Quispel, Geometric numerical integration: how to discretize differential equations while preserving their physical properties

CANCELLED: Reinout Quispel, Geometric numerical integration: how to discretize differential equations while preserving their physical properties

THIS TALK IS CANCELLED

Speaker: Prof. Reinout Quispel
La Trobe University
Title: Geometric numerical integration: how to discretize differential equations while preserving their physical properties
Date and time: Friday 13 October 2017, 3:00–4:00pm
Location: Building 8 Level 9 Room 66 (AGR) RMIT City campus

Abstract:
In this talk we give a survey of geometric numerical integration, i.e. the numerical solution of differential equations while preserving one or more of their physical properties exactly, i.e. up to round-off error. Properties that can be preserved include symplectic structure, energy and other first integrals, phase space volume, symmetries, dissipation, etc.

Bio:

1976
B.Sc. University of Utrecht, The Netherlands.
1979
M.Sc. University of Utrecht.
1979–1983
Research Associate at Leiden University, The Netherlands.
1983
Ph.D, Leiden University. Title of Thesis: “Linear Integral Equations and Soliton Systems”, supervisor: Hans W. Capel.
1983–1985
Postdoctoral Fellow at Twente University, The Netherlands.
1985–1986
Assistant Professor at Department of Mathematics, Utrecht University.
1986–1990
(Senior) Research Fellow at Australian National University.
1990–2003
Lecturer/Senior Lecturer/Reader at La Trobe University, Department of Mathematics.
2000
Reader at University of Cambridge (visiting position at DAMTP from April until July).
2004–present
Professor of Mathematics at La Trobe University.
2008–2012
ARC Australian Professorial Fellowship.
2013
Onsager Professorship and Medal (Norwegian University of Science and Technology, Trondheim).
2014–2016
ARC Distinguished Outstanding Researcher Award.

Download poster

Walter Kozlowski, Common fixed points of semigroups of monotone nonexpansive nonlinear mappings in Banach spaces

Walter Kozlowski, Common fixed points of semigroups of monotone nonexpansive nonlinear mappings in Banach spaces

Speaker: Walter Kozlowski
University of New South Wales
Title: Common fixed points of semigroups of monotone nonexpansive nonlinear mappings in Banach spaces
Date and time: Friday 8 September 2017, 3:00–4:00pm
Location: Building 8 Level 9 Room 66 (AGR) RMIT City campus

Abstract:
We consider semigroups of nonlinear mappings acting in Banach spaces equipped with a partial order. We assume that these mappings are monotone and nonexpansive on elements comparable in the order sense. We will discuss existence of common fixed points for such semigroups as well as algorithms for construction of such fixed points. We will also touch upon applications to differential equations and dynamical systems. Read more

IMO2017 session on 4 September

IMO2017 session on 4 September

After the successful meeting on Putnam problems last Monday we are continuing the theme with International Mathematical Olympiad problems.

Topic: International Mathematical Olympiad 2017 (IMO2017) problems
Time and Venue: Monday 4 September 3:30pm, AGR 8.9.66
Description: Download the problems in your favourite language: https://www.imo-official.org/year_info.aspx?year=2017 and try solving them before the meeting. During the meeting we will discuss the solutions.
Coordinator: Ben Haire.

Skip to toolbar