Woolman, T.A., and J.L. Pickard. “Gradient Descent Machine Learning With Equivalency Testing for Non-Subject Dependent Applications in Human Activity Recognition”. EAI Endorsed Transactions on Context-Aware Systems and Applications, vol. 8, no. 1, July 2022, p. e7, https://doi.org/10.4108/eetcasa.v8i24.1996.