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- W4287550003 abstract "Users can be supported to adopt healthy behaviors, such as regular physical activity, via relevant and timely suggestions on their mobile devices. Recently, reinforcement learning algorithms have been found to be effective for learning the optimal context under which to provide suggestions. However, these algorithms are not necessarily designed for the constraints posed by mobile health (mHealth) settings, that they be efficient, domain-informed and computationally affordable. We propose an algorithm for providing physical activity suggestions in mHealth settings. Using domain-science, we formulate a contextual bandit algorithm which makes use of a linear mixed effects model. We then introduce a procedure to efficiently perform hyper-parameter updating, using far less computational resources than competing approaches. Not only is our approach computationally efficient, it is also easily implemented with closed form matrix algebraic updates and we show improvements over state of the art approaches both in speed and accuracy of up to 99% and 56% respectively." @default.
- W4287550003 created "2022-07-25" @default.
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- W4287550003 date "2020-12-21" @default.
- W4287550003 modified "2023-10-18" @default.
- W4287550003 title "Fast Physical Activity Suggestions: Efficient Hyperparameter Learning in Mobile Health" @default.
- W4287550003 doi "https://doi.org/10.48550/arxiv.2012.11646" @default.
- W4287550003 hasPublicationYear "2020" @default.
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