I develop algorithms for the k-Wave ultrasound simulation toolbox. My PhD project aims to introduce adaptive spatial meshes, to improve the computational efficiency of simulations. This work is particularly useful for simulating high intensity focussed ultrasound therapy, where tightly localised regions of acoustic nonlinearity require dense spatial meshes to resolve.
My most significant result so far has been the derivation of a new mesh density function. It is based on the local bandwidth of the model’s solution, computed via the analytic (or monogenic) signal. It appears to be significantly more effective than current mesh density functions, and is applicable to a greater variety of problem types and numerical methods.
I simulated the sputtering of metallic crystals under bombardment by low-energy ions. This established the validity of atomic-scale modelling of sputtering for a large range of materials. The project’s goal was to enable the screening of materials for use in ion thrusters, where sputtering damage limits operational lifetimes.
I modelled the deformation of individual carbon fibres under transverse compressive loads. This was to assist in interpreting experimental results for characterising fibre composites.
Proteins and polymers
I modelled the conformational changes of a lactoferrin protein undergoing heat treatment, and its subsequent interactions with a range of functionalised polymers. It was found the the lobes of the protein separated, resulting in a number of strong binding sites becoming accessible. This work aimed to screen polymers for use in a device which separates lactoferrin from milk, for use as an antimicrobial supplement.
Web scraping and data analysis
This project aimed to analyse trends in the content of AfterEllen.com, a news website focussed on queer pop culture. I scraped the website’s archive, and analysed the results gained from applying a topic model to this text. It was found that political topics were much more prevalent when the website was independent, prior to it’s aquisition by MTV.
Axisymmetric ultrasound modelling
I implemented an axisymmetric formulation of the model used in the k-Wave ultrasound simulation toolbox. Discrete sine and cosine transforms were used to implement the homogeneous Neumann and Dirichlet boundary conditions necessary for this formulation.
|Doctor of Philosophy
Department of Medical Physics and Biomedical Engineering, University College London
|2014 – 2018|
Commonwealth Scientific and Industrial Research Organisation, Melbourne
|2013 – 2014|
Eggler Consulting Engineers, Canberra
|2010 – 2013|
|Bachelor of Engineering (Honours)
Bachelor of Science
Mechatronics / Mathematics, Australian National University
|2008 – 2012|
In: J. Acoust. Soc. Am., 148 (4), pp. 2288-2300, 2020.
In: Journal of Theoretical and Computational Acoustics, pp. 2050021, 2020.
In: J. Acoust. Soc. Am., 146 (1), pp. 278-288, 2019.
Bandwidth-based mesh adaptation in multiple dimensions Journal Article
In: J. Comp. Phys., 371 , pp. 651-662, 2018.
In: Commun. Comput. Phys., 24 (3), pp. 623-634, 2018.
In: J. Acoust. Soc. Am., 143 (1), pp. 529-537, 2018.
In: Commun. Comput. Phys., 22 (5), pp. 1286-1308, 2017.
IEEE International Ultrasonics Symposium, 2017.
International Symposium on Nonlinear Acoustics (AIP Conference Proceedings), 1685 , 2015.
IEEE International Ultrasonics Symposium, 2013.