Stonehenge in Wiltshire, England never fails to amaze and fascinate; and has been the subject of speculation, research and investigation for centuries. This is an early look at this enigmatic location. As the author says in the preface: "A few years ago I spent some time every summer in viewing, measuring, and considering the works of the ancient Druids in our Island; I mean those remarkable circles of Stones which we find all over the kingdom, many of which I have seen, but of many more I...

This book provides a comprehensive survey on related work for radio link quality estimation, which covers the characteristics of low-power links, the fundamental concepts of link quality estimation in wireless sensor networks, a taxonomy of existing link quality estimators and their performance analysis. It then shows how link quality estimation can be used for designing protocols and mechanisms such as routing and hand-off. The final part is dedicated to radio interference estimation, gen...