Gustavo Penha
I am a research scientist at Spotify working with search and recommendation. I am also passionate about photography and am working on my first project 🖼️.
news
| May 26, 2023 | Defended my PhD on Conversational Search and Recommendation 🎓 |
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| Apr 19, 2022 | We won the best paper award with our ECIR’22 paper 🏆 🎉. |
| Aug 27, 2021 | Finished my research internship at Amazon 📦: CHI’22 & CHIIR’22. |
research interests
Representation learningEncoders learn representations for queries and retrieval units (e.g. documents), which are then used to calculate a relevance score. The goal in contrastive learning for example is thatrelevant documentsget close to thequeryandnon-relevant documentsget far from the query in the embedding space. I am interested in many aspects of representation learning, including negative sampling techniques, disentanglement, interpretability, and fairness. |
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Explainability and model understandingInformation filtering systems, such as rankers and recommender systems, have a large impact on what we are able to find, what we are exposed to, which content is discoverable on online platforms, and the decisions we make. A better understanding of models---for example, when they fail, how robust they are, and why they are recommending certain items over others---is crucial for stakeholders such as machine learning practitioners, end users, and content providers. |
selected publications
- TheWebConf
presentations
Slides for our TheWebConf 2023 paper on entities' retrievability. video 🎬.Slides for our ECIR 2022 paper on query variations. video 🎬.