Aleix Nieto Juscafresa
PhD Student in Machine Learning.
I am a PhD student in Machine Learning at the Division of Systems and Control, Department of Information Technology, Uppsala University, supervised by Jens Sjölund. I am also a WASP PhD student in the WASP Graduate School (ML/X track, 2026 cohort). My research focuses on machine learning for breast cancer.
I hold a BSc in Mathematics from the University of Barcelona, with a minor in Statistics, and an MSc in Data Science (Machine Learning and Statistics) from Uppsala University. For my master’s thesis I developed graph neural network-based preconditioners to accelerate the GMRES algorithm — work I later continued as a research assistant in the same group, leading to a publication at the Northern Lights Deep Learning Conference (NLDL).
Before starting my PhD, I spent a year at KTH Royal Institute of Technology as a research engineer in the Division of Robotics, Perception and Learning, where I worked on a computer vision project: using diffusion-based generative models for plankton image classification within a marine environmental research project.
In my free time I enjoy hiking, travelling, and football.
News
Recent and upcoming activities.
Attending the ELLIS Summer School on Machine Learning for Healthcare and Biology in Manchester (7–9 July).
Presented our work on learned preconditioners for GMRES at NASCA 2026 in Kalamata, Greece — slides.
Started my PhD in Machine Learning at Uppsala University on 26 January.
Attended the AICC: Workshop on AI for Climate and Conservation, co-located with EurIPS 2025 in Copenhagen.
Publications
See also my Google Scholar profile.
Learning incomplete factorization preconditioners for GMRES
Graph neural network-based preconditioners for optimizing GMRES
An introduction to explainable artificial intelligence with LIME and SHAP
Teaching
Teaching Assistant, Uppsala University.
During my time as a master’s student I was employed as a Teaching Assistant at the IT department of Uppsala University. As part of my PhD education I am working 20% on teaching duties.