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Links for 2019-07-22

  • “Let’s talk about peeing in space.”

    Great Twitter thread by @MaryRobinette on the intricacies of bodily functions in zero-G

    (tags: space zero-g gravity peeing bodily-functions funny shit)

  • [1907.06902] _Are We Really Making Much Progress? A Worrying Analysis of Recent Neural Recommendation Approaches_

    Deep learning techniques have become the method of choice for researchers working on algorithmic aspects of recommender systems. With the strongly increased interest in machine learning in general, it has, as a result, become difficult to keep track of what represents the state-of-the-art at the moment, e.g., for top-n recommendation tasks. At the same time, several recent publications point out problems in today’s research practice in applied machine learning, e.g., in terms of the reproducibility of the results or the choice of the baselines when proposing new models. In this work, we report the results of a systematic analysis of algorithmic proposals for top-n recommendation tasks. Specifically, we considered 18 algorithms that were presented at top-level research conferences in the last years. Only 7 of them could be reproduced with reasonable effort. For these methods, it however turned out that 6 of them can often be outperformed with comparably simple heuristic methods, e.g., based on nearest-neighbor or graph-based techniques. The remaining one clearly outperformed the baselines but did not consistently outperform a well-tuned non-neural linear ranking method. Overall, our work sheds light on a number of potential problems in today’s machine learning scholarship and calls for improved scientific practices in this area.
    (via Halvar Flake)

    (tags: via:halvarflake deep-learning machine-learning ml papers algorithms top-n heuristics)

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