Meetings and lectures
The following is a list of meetings and lectures that we are aware of in the Australian region, or which may be of special interest to Australian mathematicians.
A more comprehensive list of meetings and events hosted by branches and special interest groups of ANZIAM is available.
Which Random Effects Model?
Speaker: Prof. Elena Kulinskaya and Ilyas Bakbergenuli (University of East Anglia)
Time & Date: 1.00 pm AEDT; Friday 14 March 2014
Venue: Room 310 (Access Grid Room), Physical Sciences 2, La Trobe University, Bundoora Campus.
Abstract: Random effects model (REM) in meta-analysis incorporates heterogeneity of effect measures across studies. We are interested in combining odds ratios from K 2\times 2 contingency tables. The standard (additive) REM is the random intercept model in 1-way ANOVA for log-odds ratios. Alternatively, heterogeneity can be induced via intra-cluster correlation, say assuming beta-binomial distributions. This (multiplicative) model is convenient for defining REM in conjunction with the Mantel–Hänzsel approach. Our method of estimating intra-class correlation (assumed constant across studies) is based on profiling the modified Breslow–Day test. Coverage of resulting confidence intervals is compared to standard methods through simulation.
Unexpectedly, we found that the standard methods are very biased in the multiplicative REM, and our new method is very biased in the standard REM.
The explanation lies in the general (but new to us) fact that any function of a random variable is biased under REM.
The question on what exactly is random under REM is a difficult question for a frequentist...
If you (and your colleagues) wish to participate, please
- book your own AGR (or university/APAC etc. AGR that you otherwise are able to use), and ask your AGR technical people to contact Darren in advance of the seminar date; and
- inform Andriy of your intention to participate.
Computational & Algorithmic Topology, Sydney
This workshop at the University of Sydney will bring together experts and emerging researchers from Australia, the USA and Europe to report on recent results and explore future directions in computational and algorithmic topology. There will be a focus on problems in low-dimensional geometry and topology, and on the development of practical algorithms and their implementation. This is an area with an abundance of computational and algorithmic challenges, where practical solutions to many solvable problems, such as the homeomorphism problem, remain elusive.
Five of the ten speakers develop freely available software to assist in their theoretical research or in the analysis of their algorithms and computational techniques. This workshop aims to stimulate interaction between researchers in order to bring about new collaborations on difficult problems that cannot be tackled from one viewpoint alone.
- Mark Bell (University of Warwick)
- Ben Burton (The University of Queensland)
- Nathan Dunfield (University of Illinois at Urbana-Champaign)
- Stefan Friedl (University of Regensburg)
- Joachim Gudmundsson (The University of Sydney)
- Joan Licata (Australian National University)
- Jessica Purcell (Brigham Young University)
- Hyam Rubinstein (The University of Melbourne)
- Saul Schleimer (University of Warwick)
- Jonathan Spreer (The University of Queensland)
Please register by e-mailing firstname.lastname@example.org.