Masahiro Sato

Exploring an Optimal Online Model for New Job Recommendation

2017

The RecSys Challenge 2017 is a competition of recommender systems including both the offline and online phases. The task of the challenge is recommending new jobs to users considering the satisfaction of both the users …

Incorporating multi-level positive feedback to session-based nearest-neighbor

2021

User feedback such as clicks, likes and follows is widely considered positive signal, as users infer their preference through these signals. However, a click feedback that is intended for a purchase indicates that the user's …