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making in pervasive health applications. Some example applications include activity recognition
algorithm s fo r monitoring dementia patients [198], or physical activity monitoring algorithms for
fitness and well-b eing applications [130]. More examples can be found in Section 16.3 .3.
16.3.1 Supervised Techniques
Two common forms of machine learning techniques are supervised learnin g a nd unsupervised
learning algorithms. The former focuses on predicting the k nown p roperties of data, while the sec-
ond focuses on discovering unknown knowledge from data.
Supervised learning techniques construct an internal