# Events

**UQ community COVID-19 updates:** See the latest UQ and government advice.

### Social network analysis: modelling the Southern Women and the terrorist Noordin Top networks

23 August 2019 11:00am–12:00pm

Murray Aitkin (University of Melbourne)

### Facial weak order in hyperplane arrangements

16 August 2019 3:00pm–4:00pm

Aram Dermenjian, from the Université du Québec à Montréal

### Natural mortality estimation using tree-based ensemble learning methods

13 August 2019 11:00am–12:00pm

Dr Chanjuan Liu

School of Economics and Management, Shanghai Maritime University

School of Economics and Management, Shanghai Maritime University

### NMR-based metabolomics and systems biology: modern metabolic research at the interface of classical biology, analytical chemistry, data science and mathematics.

8 August 2019 2:00pm–3:00pm

Horst Joachim Schirra, (The University of Queensland, Centre for Advanced Imaging)

### The extension problem and the Helgason conjecture

15 July 2019 2:00pm–3:00pm

Sundaram Thangavelu (Indian Institute of Science, Bangalor)

### 65,000 years - the rich history of Aboriginal Astronomy

10 July 2019 7:00pm–8:30pm

Join the Astronomical Society of Australia for the annual Harley Wood Public Lecture titled ‘65,000 years - the rich history of Aboriginal Astronomy’, presented by Kirsten Banks.

### The q-deformed Haldane--Shastry spin chain: from the affine Hecke algebra, via 'freezing', to exact eigenvectors

17 May 2019 11:00am–12:00pm

Dr Jules Lamers (The University of Melbourne)

### Random Stuff - an ACEMS Public Lecture at UQ

14 May 2019 6:00pm–8:00pm

Professor Dirk Kroese - Public Lecture

### Oscillations of the Prime Number Theorem Error Term

14 May 2019 3:00pm–4:00pm

A commonly known version of the prime number theorem is that the prime number counting function pi(x) grows like x/log(x). An equivalent statement is that the Chebyshev Psi function Psi(x) grows like x. It goes back to Littlewood that the error term Psi(x) - x changes sign infinitely many times. We refine a method of Kaczorowski to give a lower bound on the number of sign changes in Psi(x) - x.