I am a senior research scientist at Nokia Bell Labs and a visiting researcher at the University of Cambridge. My work enables AI to handle the messiness of the real world through human-centric, data-efficient, and robust machine learning. I am particularly interested in the following areas:
Previously, I completed a PhD in Computer Science at the University of Cambridge working with Prof. Cecilia Mascolo. During my studies, I was fortunate to work in diverse industries and companies including Microsoft Research, Telefonica Research, and Ocado. I also helped start COVID-19 Sounds, one of the largest studies in audio AI for health.
My research has been published in top venues in artificial intelligence, AI for health, and human-centered signal processing while recent projects have been featured in international media such as the BBC, CNN, Guardian, Washington Post, Forbes, and Financial Times (see more below).
october 2024 •
We released 🦜 PaPaGei, the first open foundation model for biosignals (PPG). You can read more here. I was also interviewed by Bloomberg on a newsletter about VO2max.
september 2024 •
I was a panel speaker at Cambridge Tech Week. You can watch the segment on Youtube.
august 2024 •
StatioCL, a new non-stationary self-supervised model for timeseries was accepted to CIKM 2024.
july 2024 •
Our work on how Large Language Models struggle with temporal data was published at JAMIA, and was covered by Techcrunch and LG AI Research. You can read more on this post.
june 2024 •
Our work on how Self-Supervised Learning improves fairness was accepted at KDD 2024. We released the paper, code, and a project website. I was also interviewed by Runner's World magazine on a feature article about VO2max - you can read more here.
may 2024 •
My MedAI talk from earlier this year is now available on Youtube.
april 2024 •
I was interviewed by the New York Times for an article on cardio fitness and wearables. Also launched a new Short Papers section at IEEE Pervasive journal - consider submitting your works! In addition, my first patent from a few years ago became public; you can read more here.
march 2024 •
The collection of accepted papers at the Human-Centric Representation Learning workshop is available as an Arxiv index.
february 2024 •
Co-chaired the Human-Centric Representation Learning workshop at AAAI 2024 in Vancouver, with a great set of papers and keynotes - you can read some highlights of the day at AIhub.org. I also gave an invited keynote at the Health Intelligence workshop of the same conference (here are the slides of the talk).
january 2024 •
Gave an invited talk at Cambridge Biomedical Campus as part of the MedAI seminar series.
december 2023 •
I authored a corporate blogpost describing our team's recent research. I also joined the editorial board of the IEEE Pervasive Computing journal.
november 2023 •
Our review paper on Human-centered AI was published at Royal Society Open Science. I gave a talk at the ELLIS Unit hosted by Microsoft Research [event, slides] while our fitness work was featured at the 119th annual report of Jesus College.
october 2023 •
Presented our preliminary work on large language models for timeseries at the GenAI symposium of UbiComp 2023, where I also served as a panel member. I also helped with organizing FairComp and WellComp.
september 2023 •
Presented our work on machine learning fairness in mobile computing at MobileHCI 2023, where I also served as a session chair in Industry Perspectives. I was honored to join the editorial board of Nature Digital Medicine. I am also thrilled to announce the Human-Centric Representation Learning workshop at AAAI 2024.
august 2023 •
Presented our work on latent masking for multimodal learning at the ML4MHD workshop of ICML 2023 - video here. Also featured in an article by Owkin.
july 2023 •
Our paper on domain adaptation for noisy label learning was accepted at Machine Learning for Healthcare conference (MLHC 2023).
june 2023 •
With the organizers of the Research Roundtables at ML4H 2022 we released a report on "Recent Advances, Applications and Open Challenges in Machine Learning for Health".
may 2023 •
Our music preferences paper was featured in the german newspaper Der Tagesspiegel. A paper "Evaluating Listening Performance for COVID-19 Detection by Clinicians and Machine Learning: Comparative Study" was published in JMIR, and a paper "Conditional Neural ODE Processes for Individual Disease Progression Forecasting: A Case Study on COVID-19" will appear in KDD 2023.
april 2023 •
We are organizing FairComp and WellComp workshops at UbiComp 2023 in Mexico - consider submitting your best works!
march 2023 •
Gave an invited talk on human-centric AI for health signals at a symposium organized by Cambridge Public Health and the Precision Health Initiative. My talk is available on Youtube.
february 2023 •
I was selected as a 'Rising Star in AI' by Jürgen Schmidhuber's AI initiative at KAUST and had the opportunity to talk at the honorary symposium. Also, our fitness work was covered by the Daily Mirror.
Arvind Pillai, Dimitris Spathis, Fahim Kawsar, Mohammad Malekzadeh
NeurIPS Workshop on Time Series in the Age of Large Models (TSALM @ NeurIPS'24), Vancouver, Canada
(long paper under review)
Oral presentation
Dimitris Spathis, Fahim Kawsar
Journal of the American Medical Informatics Association
also presented in: Generative AI for Pervasive Computing Symposium (GenAI4PC) at UbiComp 2023, Cancun, Mexico
Sofia Yfantidou, Dimitris Spathis, Marios Constantinides, Athena Vakali, Daniele Quercia, Fahim Kawsar
International Conference on Knowledge Discovery and Data Mining
(KDD'24), Barcelona, Spain
also presented in: Human-centric Representation Learning workshop at AAAI 2024, Vancouver, Canada
Shohreh Deldari, Dimitris Spathis, Mohammad Malekzadeh, Fahim Kawsar, Flora Salim, Akhil Mathur
ACM Conference on Web Search and Data Mining (WSDM'24) Merida, Mexico
also presented in: ICML Machine Learning for Multimodal Health Data workshop, Hawaii, USA
Chi Ian Tang, Lorena Qendro, Dimitris Spathis, Fahim Kawsar, Cecilia Mascolo, Akhil Mathur
IEEE/CVF Winter Conference on Applications of Computer Vision (WACV'24), Hawaii, USA
Yu Wu, Ting Dang, Dimitris Spathis, Hong Jia, Cecilia Mascolo
ACM International Conference on Information and Knowledge Management
(CIKM'24), Boise, USA
Julia Romero, Andrea Ferlini, Dimitris Spathis, Ting Dang, Katayoun Farrahi, Fahim Kawsar, Alessandro Montanari
Intl. Workshop on Mobile Computing Systems and Applications (HotMobile'24), San Diego, USA
Chi Ian Tang, Lorena Qendro, Dimitris Spathis, Fahim Kawsar, Cecilia Mascolo, Akhil Mathur
AAAI Human-centric Representation Learning workshop (HCRL @ AAAI'24), Vancouver, Canada
Sofia Yfantidou, Marios Constantinides, Dimitris Spathis, Athena Vakali, Daniele Quercia, Fahim Kawsar
ACM International Conference on Mobile Human-Computer Interaction (MobileHCI'23), Athens, Greece
Ting Dang, Dimitris Spathis, Abhirup Ghosh, Cecilia Mascolo
Royal Society Open Science
Yu Wu, Dimitris Spathis, Hong Jia, Ignacio Perez-Pozuelo, Tomas I Gonzales, Soren Brage, Nicholas Wareham, Cecilia Mascolo
Machine Learning for Healthcare (MLHC'23), New York, USA
Ting Dang, Jing Han, Tong Xia, Erika Bondareva, Chloë Siegele-Brown, Jagmohan Chauhan, Andreas Grammenos, Dimitris Spathis, Pietro Cicuta, Cecilia Mascolo
International Conference on Knowledge Discovery and Data Mining
(KDD'23), Long Beach, USA
Stefan Hegselmann, Helen Zhou, Yuyin Zhou, Jennifer Chien, Sujay Nagaraj, Neha Hulkund, Shreyas Bhave, Michael Oberst ... Dimitris Spathis, Jun Seita, Bastiaan Quast, Megan Coffee, Collin Stultz, Irene Y Chen, Shalmali Joshi, Girmaw Abebe Tadesse
Technical report
Jing Han, Marco Montagna, Andreas Grammenos, Tong Xia, Erika Bondareva, Chloë Siegele-Brown, Jagmohan Chauhan, Ting Dang, Dimitris Spathis, Andres Floto, Pietro Cicuta, Cecilia Mascolo
Journal of Medical Internet Research (JMIR), 25
Alican Akman, Harry Coppock, Christian Bergler, Maurice Gerczuk, Chloë Brown, Jagmohan Chauhan, Andreas Grammenos, Apinan Hasthanasombat, Dimitris Spathis, Tong Xia, Pietro Cicuta, Jing Han, Shahin Amiriparian, Alice Baird, Lukas Stappen, Sandra Ottl, Panagiotis Tzirakis, Anton Batliner, Cecilia Mascolo, Björn Wolfgang Schuller
Frontiers in Digital Health
Dimitris Spathis*, Ignacio Perez-Pozuelo*, Tomas I. Gonzales, Yu Wu, Soren Brage, Nicholas Wareham, Cecilia Mascolo (*equal contribution)
Nature Digital Medicine, 5(176)
Altmetric Top 5% of all research outputs
Jing Han*, Tong Xia*, Dimitris Spathis, Erika Bondareva, Chloë Brown, Jagmohan Chauhan, Ting Dang, Andreas Grammenos, Apinan Hasthanasombat, Andres Floto, Pietro Cicuta, Cecilia Mascolo
Nature Digital Medicine, 5(16)
Dimitris Spathis, Ignacio Perez-Pozuelo, Laia Marques-Fernandez, Cecilia Mascolo
Cell Patterns, 3(2)
Ignacio Perez-Pozuelo, Marius Posa, Dimitris Spathis, Kate Westgate, Nicholas Wareham, Cecilia Mascolo, Soren Brage, Joao Palotti
Scientific Reports, 12 (7956)
Ting Dang, Jing Han, Tong Xia, Dimitris Spathis, Erika Bondareva, Chloë Brown, Jagmohan Chauhan, Andreas Grammenos, Apinan Hasthanasombat, Andres Floto, Pietro Cicuta, Cecilia Mascolo
Journal of Medical Internet Research (JMIR), 24(6)
David Greenberg, Sebastian Wride, Daniel Snowden, Dimitris Spathis, Jeff Potter, Jason Rentfrow
Journal of Personality and Social Psychology, 122(2)
Altmetric Top 5% of all research outputs
Apinan Hasthanasombat, Abhirup Ghosh, Dimitris Spathis, Cecilia Mascolo
UbiComp workshop on Human Activity Sensing Corpus & Applications (HASCA @ UbiComp'22), Cambridge, UK
Tong Xia*, Dimitris Spathis*, Chloe Brown, Jagmohan Chauhan, Andreas Grammenos, Jing Han, Apinan Hasthanasombat, Erika Bondareva, Ting Dang, Andres Floto, Pietro Cicuta, Cecilia Mascolo
Neural Information Processing Systems (NeurIPS'21), Datasets and Benchmarks Track
Dimitris Spathis, Ignacio Perez-Pozuelo, Soren Brage, Nicholas Wareham, Cecilia Mascolo
Conference on Health, Inference, and Learning (CHIL'21), Virtual event, USA
Jing Han, Chloë Brown*, Jagmohan Chauhan*, Andreas Grammenos*, Apinan Hasthanasombat*, Dimitris Spathis*, Tong Xia*, Pietro Cicuta, Cecilia Mascolo
International Conference on Acoustics, Speech, & Signal Processing (ICASSP'21), Toronto, Canada
Chi Ian Tang, Ignacio Perez-Pozuelo*, Dimitris Spathis*, Soren Brage, Nicholas Wareham, Cecilia Mascolo
Proc. on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT/Ubicomp'21), 5(1)
Björn W. Schuller, ... Dimitris Spathis, Tong Xia, Pietro Cicuta, Leon J. M. Rothkrantz, Joeri Zwerts, Jelle Treep, Casper Kaandorp
Conference of the International Speech Communication Association (Interspeech'21), Brno, Czechia
Ignacio Perez-Pozuelo, Dimitris Spathis, Jordan Gifford-Moore, Jessica Morley, Josh Cowls
Journal of the American Medical Informatics Association, 28(9)
Benjamin Searle, Dimitris Spathis, Marios Constantinides, Daniele Quercia, Cecilia Mascolo
ACM International Conference on Mobile Human-Computer Interaction (MobileHCI'21), Toulouse, France
Stefanos Laskaridis, Dimitris Spathis, Mario Almeida
ACM International Conference on Mobile Computing and Networking (MobiCom), New Orleans, USA (tutorial)
Ignacio Perez-Pozuelo, Dimitris Spathis, Emma Clifton, Cecilia Mascolo
Digital Health, Chapter 3
Chloë Brown*, Jagmohan Chauhan*, Andreas Grammenos*, Jing Han*, Apinan Hasthanasombat*, Dimitris Spathis*, Tong Xia*, Pietro Cicuta, Cecilia Mascolo
International Conference on Knowledge Discovery and Data Mining (KDD'20), San Diego, USA
Oral presentation Cambridge University Hall of Fame Better Future Award
Dimitris Spathis, Ignacio Perez-Pozuelo, Soren Brage, Nicholas Wareham, Cecilia Mascolo
NeurIPS Machine Learning for Mobile Health workshop (ML4MH @ NeurIPS'20), Vancouver, Canada
Chi Ian Tang, Ignacio Perez-Pozuelo, Dimitris Spathis, Cecilia Mascolo
NeurIPS Machine Learning for Mobile Health workshop (ML4MH @ NeurIPS'20), Vancouver, Canada
Dimitris Spathis, Sandra Servia, Katayoun Farrahi, Cecilia Mascolo, Jason Rentfrow
International Conference on Knowledge Discovery and Data Mining (KDD'19), Anchorage, USA
Oral presentation (Top 6%)
Dimitris Spathis, Sandra Servia, Katayoun Farrahi, Cecilia Mascolo, Jason Rentfrow
International Conference on Pervasive Computing Technologies for Healthcare (PervasiveHealth'19), Trento, Italy
Interactive dimensionality reduction
using similarity projections
Dimitris Spathis, Nikolaos Passalis, Anastasios Tefas
Knowledge-Based Systems, 165
Fast, Visual and Interactive Semi-supervised Dimensionality Reduction
Dimitris Spathis, Nikolaos Passalis, Anastasios Tefas
ECCV Efficient Feature Representation Learning workshop (CEFRL @ ECCV'18), Munich, Germany
Diagnosing Asthma and Chronic Obstructive Pulmonary Disease with Machine Learning
Dimitris Spathis, Panayiotis Vlamos
Health Informatics Journal, 25(3)
Class-based Prediction Errors to Detect Hate Speech with
Out-of-vocabulary Words
Joan Serra, Ilias Leontiadis, Dimitris Spathis, Gianluca Stringhini, Jeremy Blackburn, Athena Vakali
ACL Abusive Language Online workshop (ALW @ ACL'17), Vancouver, Canada
A comparison between semi-supervised and supervised text mining techniques on detecting irony in greek political tweets
Basilis Charalampakis, Dimitris Spathis, Elias Kouslis, Katia Kermanidis
Engineering Applications of Artificial Intelligence, 51
Detecting Irony on Greek Political Tweets: A Text Mining Approach
Basilis Charalampakis, Dimitris Spathis, Elias Kouslis, Katia Kermanidis
International Conference on Engineering Applications of Neural Networks, Rhodes, Greece
Glocal News: An Attempt to Visualize the Discovery of Localized Top Local News, Globally
Dimitris Spathis, Theofilos Mouratidis, Spyros Sioutas, Athanasios Tsakalidis
International Conference on Conceptual Modeling, Hong Kong, China
Machine learning to model health with multimodal mobile sensor data
PhD thesis
University of Cambridge, 2021
Learning to interact with high-dimensional data
MSc thesis
Aristotle University, 2017
Apparatus & method for generating feature embeddings
Nokia, US20240273404A1 (filed 2023, published 2024)
Apparatus, method, and computer program for transfer learning
Nokia, US20240127057A1 (filed 2022, published 2024)
Leadership & Organizer roles:
Program Committee Member: AAAI 2021-2024, IJCAI 2020, KDD 2020-2023, FAccT 2023, SIAM SDM 2022, Sensiblend @ Ubicomp 2021, Mobiquitous 2022.
Reviewer: NeurIPS, ICLR, ICML, AAAI, IJCAI, KDD, CHI, Ubicomp/IMWUT, CHIL, Nature Digital Medicine, WACV, Nature Scientific Reports, ICASSP, Expert Systems with Applications, Neurocomputing, WWW/The Web Conference, Engineering Applications of Artificial Intelligence, ICWSM, and more.
Large Language Models for timeseries: Techcrunch, LG AI Research.
Audio AI for COVID-19: Cambridge University (1), (2), (3), (4), BBC, The Guardian, Financial Times, The Times, Forbes, Slate, Huffington Post, DailyMail, ITV, IEEE Spectrum, TheNextWeb, STAT, EPFL, TheScientist, The Register, KDnuggets, NPR/WBUR, Psychology Today, El Pais, RAI, Corriere della Sera, Focus, DerStandard.
AI for wearables: Cambridge University (1), (2), New York Times, Bloomberg, VentureBeat, Business Insider, Runner's World, Communications of the ACM, Daily Mirror, Bicycling Magazine, Owkin, Spektrum.de.
Data-driven music psychology: Cambridge University, The Times, Washington Post, CNN, The Telegraph, Sky News, ITV, DailyMail, Inc., CTV, ZDF, Der Tagesspiegel, ABC.ES, ABC.AU, ELLE, Cosmopolitan, RTBF, TEDx.
Interviews: IndiaAI.gov
I enjoy collaborating with PhD and thesis students, usually as part of an internship in our lab. Here are some recent research projects I supervised:
I have also been a teaching assistant for the following undergraduate courses:
“The next big thing in technology often starts off looking like a toy”
Communitypoprefs.com is a data visualization website, where we present every pop-culture reference over the course of 5 seasons of the TV series Community.
Visualizing my favourite songs on Spotify with dimensionality reduction and anomaly detection. Data essay published in Cuepoint Magazine, Medium's premier music publication.
Text mining Game of Thrones, Harry Potter, Hunger Games and Lord of the Rings books. Data essay featured in Medium's Editor Picks.
Mobile app with face recognition, age estimation, & emotion recognition to blur kids or replace their face with emotion-based emoji. Developed during HackZurich 2018.
Glocalne.ws was a mashup of Google News and Google Maps. Unfortunately it is now defunct due to API discontinuance.
Training neural networks on massive amounts of musical notation and literature and letting them create their own art. Essay in Greek but you can still see/listen to the results.
Non-academic things about me: I love music, both playing and listening. I am mostly into art rock and indie folk, with the occasional exception of some well-crafted pop. Although I am an accordionist by training, over the last few years I've been playing mostly piano and ukulele. In a previous life, I performed with the critically acclaimed band The Children of the Oldness (aka Kore Ydro) and recorded the album "Consortium in Amato" (listen here).
I also enjoy street photography and in particular playing with light—photography comes from Greek φως (light) and γραφή (writing), or drawing with light. A sample of my shots is on Flickr and one of my landscapes was featured in the Huffington Post.
Lastly, and perhaps most importantly, I'm always on the lookout for ways to move items from the "non-academic list" to the "academic list"—let me know if you'd like to help!