This book introduces fundamental concepts and theories in pervasive computing as well as its key technologies and applications. It explains how to design and implement pervasive middleware and real application systems, covering nearly all aspects related to pervasive computing. Key technologies in the book include pervasive computing-oriented resource management and task migration, mobile pervasive transaction, human computer interface, and context collection-oriented wireless sensor networks.

Urban environments (including built, natural, and social environments) crucially impact children's physical and psychological health, particularly in cities. Now children's mentality and safety, and the freedom of travelling and playing have raised concerns in society. In this issue, trans-disciplinary discussions between scholars and practitioners in landscape architecture and environmental psychology, environmental behaviours, human engineering, public health, etc., as well as city managers, are encouraged to explore the ways to improve urban environments for children's outdoor activities. With such a multi-disciplinary coverage, this issue aims to update landscape architects' theoretical and methodological approaches to issues of children and urban environments, with a deeper understanding of their disciplinary competences, limitations, and challenges thus to find out their irreplaceable role in guaranteeing children's well-beings.

This book introduces fundamental concepts and theories in pervasive computing as well as its key technologies and applications. It explains how to design and implement pervasive middleware and real application systems, covering nearly all aspects related to pervasive computing. Key technologies in the book include pervasive computing-oriented resource management and task migration, mobile pervasive transaction, human computer interface, and context collection-oriented wireless sensor networks.