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Powell, L. , Polsley, S. , Casey, D. , Hammond, T.. "Improving Activity Recognition Classification of Repetitious Beginner Swimming Using a 2-Step Peak/Valley Segmentation Method with Smoothing and Resampling for Machine Learning". World Academy of Science, Engineering and Technology, Open Science Index 203, International Journal of Computer and Systems Engineering, (2023), 17(11), 611 - 618.