John Weston – författare

Inertial navigation is widely used for the guidance of aircraft, missiles, ships and land vehicles, as well as in a number of novel applications such as surveying underground pipelines in drilling operations. This book sets out to provide a clear and concise description of the physical principles of inertial navigation, the associated growth of errors and their compensation. There is also detailed treatment of recent developments in inertial sensor technology and a description of techniques for implementing and evaluating such systems. This new edition includes a number of refinements covering sensor technology, geodesy and error modelling, plus new chapters on MEMS technology and inertial systems applications.

John Weston has spent many years leading tours of Biblical sites in the Middle East. Now he has brought together a series of meditations, first on the Isle of Patmos, and then on each of the seven churches in present-day Turkey which are mentioned in the early chapters of the book of Revelation in the Bible. With his attractive, alliterative style, the author transports the reader to the place where the Apostle John saw his apocalyptic vision of Jesus Christ. What was it like? What were the themes which were unfolded to him? Reading the first chapter, one could almost be sitting in the Apostle's cave on the Isle of Patmos as the tour guide sets the scene! At appropriate points the explanation is reinforced with a familiar (or unfamiliar) hymn. John, in his vision, received dictated letters for seven first-century churches in cities of the country which is now Turkey. The author leads the reader to each church in turn and the significance of the correspondence it received is reviewed from historical, prophetic and topical points of view. Strong arguments are advanced for the continuing relevance of these letters to churches and individual Christians today.The tour ends with a grand review of each place visited and the comparative lessons to be learned. So is the book simply a tour guide? As preparation for, a souvenir of, or a virtual replacement for a tour of Patmos and the Seven Churches, this book is ideal. But it is much more than that. As an easy-to-read meditation on the early chapters of the book of Revelation, considered within the framework of the prophetic and practical teachings of the rest of the Old and New Testaments, it is a valuable aid to those who really want to know the relevance of Revelation for the twenty-first century Christian.

HE ORIGINS of welding are buried in the depths of antiquity, T commencing with the forging of native gold and copper, progressing in the bronze age with the braze welding of castings, but not developing greatly until relatively recently. It has been this century, and the latter half in particular, that welding has developed to the stage where there are more than 100 variants. Furthermore, joining by welding has become such an efficient technique that much of our modem way oflife would not be possible without it. The giant oil rigs, built to withstand the rigours of the North Sea, the minute wire connectors in the computer and transistor, and the automobile and truck, could not exist were it not for welding processes. Originally a uniquely manual process, the needs of industry have this century required welding techniques which could be mechanised. Some processes, such as friction welding, were readily mechanised but the most flexible and adaptable fusion processes awaited develop­ ments which allowed a continuous wire to be rapidly fed into the fusion zone. These processes, such as MAG and submerged arc, rapidly gave rise to machines for welding, with many appearing before the Second World War.