Wireless sensor networks are currently being employed in a variety of applications ranging from medical to military, and from home to industry. Wireless Sensor Networks and Applications aims to provide a reference tool for the increasing number of scientists who depend upon reliable sensor networks. The book is divided into five sections: design and modeling, network management, data management, security, and applications. The eighteen self-contained chapters are authored by experts in wireless networking. Each chapter is given expository but also scholarly treatment, covering the history of its specific topic, reviewing state-of-the-art thinking relative to the topic, and discussing currently unsolved problems of special interest. Key Features: *Explores different access control protocols and wake up strategies in wireless sensor networks; *Discusses several time-synchronization techniques and challenges, i.e., directed diffusion, tiny aggression, greedy aggression on directed diffusion; *Provides insights in network security, i.e., secure routing, and proper management; *Elaborates on numerous wireless sensor network applications, i.e., the ExScal application and the XSM platform. The topics covered within this book are intended for researchers, computer engineers, applied mathematicians, and graduate students interested in wireless sensor networks, but uninformed readers may also find this volume stimulating and helpful.