Tag Archives: air quality

Australia-China Centre turns 1

Has it already been a year?

This week the Australia-China Centre for Air Quality Science and Management had its second annual meeting, at QUT. We got updates on the various research activities that have happened, are happening and are planned. There’s lots of interesting stuff being done to tackle a variety of problems, such as reducing workplace exposure to air pollution, quantifying the exposure of individuals and using unmanned aerial vehicles to measure air quality.

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Tuesday night we had the conference dinner out at the Mount Coot-tha Botanic Gardens, at the function space at the cafe/restaurant out there. I don’t think I’ve been there since my cousin’s wedding reception 15-20 years ago. I really liked that efforts were made to ensure each table had a mix of senior professors, mid- and early-career researchers and PhD students. It made for a very inclusive dinner and many different topics of conversation. Luckily I was sat with a co-worker with whom I could trade my fish entree and mains for something a little more land-based. There was even a birthday cake (chocolate mousse cake) and a number of people joined in singing “Happy Birthday” to the ACC.

Wednesday we spent the day workshopping the various planned projects to determine what issues need to be addressed in the collection and analysis of data. I ended up sitting with a group looking at the impacts of indoor temperature on mortality rates, particularly trying to estimate the relative risk of extreme heat and cold. It was good to be confronted with some new challenges to think about, rather than the same stuff I’ve been working on almost non-stop this year.

All in all, it was a good meeting even though the stress levels around here were through the roof in the lead-up. I ended up taking photos of nearly all of the presenters on the Tuesday as well as group photos with our Chinese collaborators and special invited guests.

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Posterior samples

ARC Discovery Projects have been returned to their authors, and we are putting our responses together for the rejoinders. Interesting to see that we got a comment suggesting that we use the less restrictive CC-by instead of CC-by-nc-sa as we’d suggested. We weren’t successful in our Linkage Project applications, which is disappointing as they were interesting projects (well, we thought so). Continuing to bring research funding in is an ongoing struggle for all research groups and I feel it’s only going to get harder as the new federal government’s research priorities appear to be more aligned to medical science that delivers treatments than to our group’s traditional strengths.

SEB113 is pretty much completely over for the semester, with marks having been entered for almost every student. Overall I think the students did fairly well. We had some issues with the timetable this semester. Ideally, we’d like the Lecture, then all of the computer labs, then all of the workshops, so that we can introduce a statistical idea, show the code and then apply the idea and code in a group setting. Next semester, we have the lecture followed immediately by the workshops with the computer labs dotted throughout the remainder of the week. This has provided us with an opportunity to try some semi-flipped classroom ideas, where students are able/expected to do the computer lab at home at their own pace rather than watch a tutor explain it one line at a time at the front of a computer lab.

I’m teaching part of a two day course on the use of R in air pollution epidemiology. My part will introduce Bayesian statistics with a brief overview, a discussion about prior distributions as a means of encoding a priori beliefs about model parameters, and discuss the use of Bayesian hierarchical modelling (as opposed to more traditional ANOVA techniques) as a way of making the most of the data that’s been collected. The other two presenters are Dr Peter Baker and Dr Yuming Guo. The course is being run by the CAR-CRE, who partially fund my postdoctoral fellowship.

I had meant to post this back when they were doing the rounds, but there’s a bunch of plots that attempt to show that correlation isn’t causation and that spurious correlations exist in large data sets. Tom Christie has responded to this by going over the fact that correlation in time series isn’t as simple as in the case of independent, identically distributed data. One should be careful that one’s criticism of bad statistics is itself founded on good statistics.

Posterior samples

A rough guide to spotting bad science.

Why big data is in trouble: they forgot about applied statistics. Big data analytics are all well and good but you have to keep in mind that there are statistical properties that govern which inferences are valid.

While I’m comfortable giving a lecture I really struggled to get through them in undergrad. It turns out they may not be the most effective way to get information to students.

My supervisors, Professor Lidia Morawska, is giving a public talk (free to register) at QUT soon, “Air Quality Reports On Our Mobiles – Do We Care?” June 6 2014