Welcome to my site.
I am currently an EPSRC Doctoral Prize Fellow at the University of Bristol. I specialise in machine learning techniques applied to astronomical data, with a focus on improving active learning performance and exploring the utility of weak supervision. My work has enabled me to be involved and consult in the morphology classification pipeline of the recently launched ESA telescope Euclid.Current Research
I am based in the Data-Intensive Astronomical Analysis research group where I am working on:
- Improving astronomical classification using Generative Models.
- Parameter estimation of simulations using SBI.
- Calibration of simulations within Digital Twins.
PhD Research
My PhD Improving The Practicality of Active Learning Pipelines in Real-World Problem Settings: A Case Study in The Classification of Astronomical Data explored the following topics:
- Creating novel query strategies to improve accuracy and reduce labelling costs for active learning.
- Combining the use of weak supervision methods with active learning to improve performance on datasets where labels are scarce, noisy, or difficult to obtain.
- Using active learning for galaxy morphology classification with noisy image data and unreliable labels.
- Source classification (star, galaxy, AGN, QSO separation) using Active Learning and Outlier Detection methods.
- Creating interactive software for researchers to make use of cutting-edge machine learning techniques.
Supervisory Team
Sotiria Fotopoulou , Oliver Ray and Malcolm BremerRecent Publications
B. Aussel, S. Kruk, M. Walmsley, M. Huertas-Company, M. Castellano, C.J. Conselice, M. Delli Veneri, H. Domínguez-Sánchez, P.-A. Duc, U. Kuchner, A. La Marca, B. Margalef-Bentabol, F.R. Marleau, G. Stevens, Y. Toba, C. Tortora, L. Wang, Euclid Consortium
Astronomy & Astrophysics
PDF DOI BIB ABSTRACT
R. Green, G. Stevens, T. de Menezes e Silva Filho, Z. Abdallah
Arxiv Preprint
PDF DOI BIB ABSTRACT
Recent Posts
My Experience of Being a Student Ambassador
Published:
Why widening participation and outreach projects are so important for prospective students from underrepresented backgrounds. Read more
Recent Talks
The Hidden Difficulties of Machine Learning
Presented at Access To Bristol, 2021
On-campus presentation to 30 local sixth form students who intend to study Engineering at university. This presentation immediately followed the AI & ML:Cutting Through The Hype talk and was used to show how ML tasks are often not as straightforward as they may seem. This talk is very interactive with the aim that the students are able to discover the problems that appear themselves and see why certain solutions may not be sufficient for a problem. Read more
AI & ML: Cutting Through The Hype
Presented at Sutton Trust Summer School, 2021
Webinar presented to 60 sixth form students who intend to study Engineering at university. The presentation starts with an introduction to what Computer Science is (and is not) like at university. Following this, the (very brief) foundations of what Machine Learning and AI really are. Unfortunately, the adoption of these tools has led to a large amount of over-exaggeration and overuse of certain buzzwords throughout the industry, making it seem like companies are doing super complicated and ground-breaking things when most of the time they’re doing nothing more than the Maths the students use in their A-Level studies. I also show the Dot-Com Boom and the AI Winter as examples for how overhyping can be damaging for research progress and the economy. Read more