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In 1933 Robert Byron began a journey through the Middle East via Beirut, Jerusalem, Baghdad, and Teheran to Oxiana--the country of the Oxus, the ancient name for the river Amu Darya which forms part of the border between Afghanistan and the Soviet Union. The Road to Oxiana offers not only a wonderful record of his adventures, but also a rare account of the architectural treasures of a region now inaccessible to most Western travelers.
Xerxes, Great King of the Persian Empire from 486–465 B.C., has gone down in history as an angry tyrant full of insane ambition. The stand of Leonidas and the 300 against his army at Thermopylae is a byword for courage, while the failure of Xerxes’ expedition has overshadowed all the other achievements of his twenty-two-year reign. In this lively and comprehensive new biography, Richard Stoneman shows how Xerxes, despite sympathetic treatment by the contemporary Greek writers Aeschylus and Herodotus, had his reputation destroyed by later Greek writers and by the propaganda of Alexander the Great. Stoneman draws on the latest research in Achaemenid studies and archaeology to present the ruler from the Persian perspective. This illuminating volume does not whitewash Xerxes’ failings but sets against them such triumphs as the architectural splendor of Persepolis and a consideration of Xerxes’ religious commitments. What emerges is a nuanced portrait of a man who ruled a vast and multicultural empire which the Greek communities of the West saw as the antithesis of their own values.
Elasto-Hydrodynamic Lubrication deals with the mechanism of elasto-hydrodynamic lubrication, that is, the lubrication regime in operation over the small areas where machine components are in nominal point or line contact. The lubrication of rigid contacts is discussed, along with the effects of high pressure on the lubricant and bounding solids. The governing equations for the solution of elasto-hydrodynamic problems are presented. Comprised of 13 chapters, this volume begins with an overview of elasto-hydrodynamic lubrication and representation of contacts by cylinders, followed by a discussion on equations relevant to lubrication, including the Reynolds equation. The reader is then introduced to lubrication of rigid cylinders; the importance of film thickness in highly loaded rigid contacts; the elasticity of solids in contact; and the theory of elasto-hydrodynamic lubrication. Subsequent chapters focus on apparatus and measurements of film thickness and film shape; friction and viscosity; and lubrication of gears and roller bearings. This book will be of interest to tribologists.