I am part-time Professor of Computational Statistics and Machine Learning in the Department of Computer Science at UCL, and Senior Researcher at Istituto Italiano di Tecnologia, where I lead the CSML research group. My research interests are in the areas of machine learning, with a focus on statistical learning theory, kernel methods, multitask and transfer learning, online learning, learning over graphs and sparsity regularization. I also have some interests in approximation theory, numerical optimization and statistical estimation, and I have pursued machine learning applications arising in computer vision, bioinformatics and user modeling.