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Royal Navy returns to wind power with trial of robotic sailboats

New Scientist

Oshen's robotic sailboats are powered by the wind and the sun The UK's Royal Navy may return to the age of sail, with a new demonstration involving a flotilla of small, wind-propelled robot boats. Made by Oshen in Plymouth, UK, the vessels, known as C-Stars, are just 1.2 metres long and weigh around 40 kilos. Solar panels power navigation, communications and sensors, while a sail provides propulsion. Deployed as a constellation, the small vessels act as a wide-area sensor network. How the US military wants to use the world's largest aircraft "The simplest way of describing C-Stars is as self-deploying, station-keeping ocean buoys," says Oshen CEO Anahita Laverack .






A Linear Speedup Analysis of Distributed Deep Learning with Sparse and Quantized Communication

Neural Information Processing Systems

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OnLearningFairnessandAccuracyonMultiple Subgroups

Neural Information Processing Systems

In the upper-level, the fair predictor is updated to beclose toallsubgroup specific predictors. Wefurther provethat such abilevel objective can effectively control the group sufficiency and generalization error.