In response to the ever-increasing global threat of terrorist attacks, the personal screening industry has been growing at a rapid rate. Many methods have been developed for detecting concealed weapons and explosives on the human body. In this important new book, the authors discuss their experiences over the last decade designing and testing microwave and millimetre wave detection and screening systems. It includes examples of actual devices that they have built and tested, along with test results that were obtained in realistic scenarios. The book focuses on the development of non-imaging detection systems, which are similar to radar. These systems do not form a conventional image of the scene and the person(s) being screened. Instead, the sensors detect and analyze the effect that the body, and any concealed objects, has on a transmitted waveform. These systems allow remote detection of both metallic and dielectric devices concealed on the human body in both indoor and outdoor environments. The book discusses a number of sensor types, including active millimetre wave sensors using the direct detection and the heterodyne approach, active microwave sensors for CNR-based object detection, passive millimetre wave sensors, and the role of shielding effects in operating non-imaging MM-wave sensors. The goal of this book is to systemize the test results obtained by the authors, helping specialists to develop improved screening systems in the future. Another goal is to show how the use of non-imaging systems can reduce the cost of the screening process.
Nicholas Capaldi's biography of John Stuart Mill traces the ways in which Mill's many endeavours are related and explores the significance of Mill's contribution to metaphysics, epistemology, ethics, social and political philosophy, the philosophy of religion, and the philosophy of education. He shows how Mill was groomed for his life by both his father James Mill, and Jeremy Bentham, the two most prominent philosophical radicals of the early nineteenth century. Yet Mill revolted against this education and developed friendships with both Thomas Carlyle and Samuel Taylor Coleridge, who introduced him to Romanticism and political conservatism. A special feature of this biography is the attention devoted to his relationship with Harriet Taylor. No one exerted a greater influence than the woman he was eventually to marry. Nicholas Capaldi reveals just how deep her impact was on Mill's thinking about the emancipation of women.
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