Preface.

This issue of JAISE is composed of four papers. However, current methods of defining zones heavily depend on the robot's on-board sensing capabilities and often require a direct line of sight between the human user and the robot. The paper B "Representation learning for minority and subtle activities in a smart home environment" b by Sanabria et al. proposes a hierarchical activity classifier based on a two-phase learning scheme. [Extracted from the article]