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450-million year old jellyfish ancestor looks like a flailing carwash tubeman

Popular Science

'Paleocanna tentaculum' was more closely related to today's marine invertebrates than its prehistoric relatives. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. Interpretive drawings of Paleocanna tentaculum as living organisms: depiction of individual polyps living in single tubes, as well as clusters of two or three tubes attached together. Breakthroughs, discoveries, and DIY tips sent six days a week. Jellyfish are delicate, almost ghostly creatures.


Adversarially Robust Multi-task Representation Learning

Neural Information Processing Systems

We study adversarially robust transfer learning, wherein, given labeled data on multiple (source) tasks, the goal is to train a model with small robust error on a previously unseen (target) task. In particular, we consider a multi-task representation learning (MTRL) setting, i.e., we assume that the source and target tasks admit a simple (linear) predictor on top of a shared representation (e.g., the final hidden layer of a deep neural network). In this general setting, we provide rates on the excess adversarial (transfer) risk for Lipschitz losses and smooth nonnegative losses. These rates show that learning a representation using adversarial training on diverse tasks helps protect against inference-time attacks in data-scarce environments. Additionally, we provide novel rates for the single-task setting.



On Causal Discovery in the Presence of Deterministic Relations

Neural Information Processing Systems

In this paper, we find, supported by both theoretical analysis and empirical evidence, that score-based methods with exact search can naturally address the issues of deterministic relations under rather mild assumptions. Nonetheless, exact score-based methods can be computationally expensive.


Deep Learning in Medical Image Registration: Magic or Mirage?

Neural Information Processing Systems

While optimization-based methods boast gen-eralizability across modalities and robust performance, learning-based methods promise peak performance, incorporating weak supervision and amortized optimization. However, the exact conditions for either paradigm to perform well over the other are shrouded and not explicitly outlined in the existing literature.