Electromagnetic waves are guided by open structures in a variety of applications at radio, microwave, millimetric and optical frequencies. Examples range from the propogation of radiowaves down the shaft of an oil rig to that of light through an optical fibre. As the guide is open, radiation may also be present, for example from a microstrip-fed patch or a slot antenna. These twin aspects of waveguiding and radiation are in fact closely interwoven and this book is the first to deal with the two by means of a single mathematical formalism.

An exploration of the fundamental relationship between opera and urban modernity in three iconic cities: London, Paris, and New York.

At the end of the nineteenth century, London, Paris, and New York were quintessential modern metropolises and vital centers for opera. In Operatic Infrastructures, Flora Willson examines opera’s intimate entanglements with the material worlds of these cities to locate the physical roots of long-accepted ideas about the art form.

Reaching beyond histories of opera as spectacle, this book investigates the material underpinnings of opera’s existence at the century’s end: as an inter-urban, multimedia network. Operatic Infrastructures considers emergent technologies such as the telephone and the subway, but it also retrieves the hidden, forgotten, and otherwise effaced traces of systems such as storage facilities and colonial trade routes. It takes seriously the mundane aspects of materiality, from the blandest clichés of newspaper columns to the fine print of insurance certificates. In doing so, the book reveals just how far these interfaces with modern urban life reached into opera’s own systems of meaning-making and performance in the 1890s—making it impossible to demarcate neatly between “opera” and its so-called “context.” Without such operatic infrastructures, Willson shows, there would be no opera at all.