Since the early days of modem physics spectroscopic techniques have been employed as a powerful tool to assess existing theoretical models and to uncover novel phenomena that promote the development of new concepts. Conventionally, the system to be probed is prepared in a well-defined state. Upon a controlled perturbation one measures then the spectrum of a single particle (electron, photon, etc.) emitted from the probe. The analysis of this single particle spectrum yields a wealth of important information on the properties of the system, such as optical and magnetic behaviour. Therefore, such analysis is nowadays a standard tool to investigate and characterize a variety of materials. However, it was clear at a very early stage that real physical compounds consist of many coupled particles that may be excited simultaneously in response to an external perturbation. Yet, the simultaneous (coincident) detection of two or more excited species proved to be a serious technical obstacle, in particular for extended electronic systems such as surfaces. In recent years, however, coincidence techniques have progressed so far as to image the multi-particle excitation spectrum in an impressive detail. Correspondingly, many-body theoretical concepts have been put forward to interpret the experimental findings and to direct future experimental research. This book gives a snapshot of the present status of multi-particle coincidence studies both from a theoretical and an experimental point of view. It also includes selected topical review articles that highlight the achievements and the power of coincident techniques.

The development of surface physics and surface chemistry as a science is closely related to the technical development of a number of methods involving electrons either as an excitation source or as an emitted particle carrying characteristic information. Many of these various kinds of electron spectroscopies have become commercially available and have made their way into industrial laboratories. Others are still in an early stage, but may become of increasing importance in the future. In this book an assessment of the various merits and possible drawbacks of the most frequently used electron spectroscopies is attempted. Emphasis is put on prac tical examples and experimental design rather than on theoretical considerations. The book addresses itself to the reader who wishes to know which electron spectroscopy or which combination of different electron spectroscopies he may choose for the particular problems under investigation. After a brief introduction the practical design of electron spectrometers and their figures of merit important for the different applications are discussed in Chapter 2. Chapter 3 deals with electron excited electron spectroscopies which are used for the elemental analysis of surfaces. Structure analysis by electron diffrac tion is described in Chapter 4 with special emphasis on the use of electron diffrac tion for the investigation of surface imperfections. For the application of electron diffraction to surface crystallography in general, the reader is referred to Volume 4 of "Topics in Applied Physics.""

Since the early days of modem physics spectroscopic techniques have been employed as a powerful tool to assess existing theoretical models and to uncover novel phenomena that promote the development of new concepts. Conventionally, the system to be probed is prepared in a well-defined state. Upon a controlled perturbation one measures then the spectrum of a single particle (electron, photon, etc.) emitted from the probe. The analysis of this single particle spectrum yields a wealth of important information on the properties of the system, such as optical and magnetic behaviour. Therefore, such analysis is nowadays a standard tool to investigate and characterize a variety of materials. However, it was clear at a very early stage that real physical compounds consist of many coupled particles that may be excited simultaneously in response to an external perturbation. Yet, the simultaneous (coincident) detection of two or more excited species proved to be a serious technical obstacle, in particular for extended electronic systems such as surfaces. In recent years, however, coincidence techniques have progressed so far as to image the multi-particle excitation spectrum in an impressive detail. Correspondingly, many-body theoretical concepts have been put forward to interpret the experimental findings and to direct future experimental research. This book gives a snapshot of the present status of multi-particle coincidence studies both from a theoretical and an experimental point of view. It also includes selected topical review articles that highlight the achievements and the power of coincident techniques.

This fascinating volume breaks new ground in examining the status and lives of women in Europe during the Middle Ages, offering revealing new insights into the role of women in a wide range of religious, sexual and domestic affairs.
As this book amply demonstrates, women were central to the spiritual life of the medieval Church: Jo Ann McNamara writes on the legacy of miracles in the nunneries of Merovingian Gaul, Suzanne Wemple on one of the most important female monasteries in northern Italy, and Phyllis Roberts on the ideal of the virginal life. But the book is equally concerned with the family and relations between men and women. Leah Lydia Otis, for example, looks at the practice of prostitution in late medieval Perpignan; Helen Rodnite Lemay discusses medieval gynecology; and Julius Kirshner provides a revolutionary study of wives' claims against insolvent husbands, challenging the notion that the legal rights of women deteriorated in late medieval Italy.

Examination of staging techniques in Lope de Vega's comedies. This volume examines the staging techniques used by Lope de Vega in his comedies, especially those dealing with national historic/legendary materials, and with the Spanish-American landscape. Taking as a premise the difference between `telling' and `representing', Professor Kirschner bases her study on the performance aspects of the text, giving equal value to `extra-verbal' and `verbal' signs, such as those which describe the scenery and character's physique; other visual (decor, wardrobe, movement, gesture, lighting) and acoustic (music, voices, songs) elements are also analysed. The first part of the book deals with specific dramatic strategies used by Lope in his representationof dreams, sexuality, and the collective character; the author then moves on to consider the implications of staging within the structure of the plays. The final section is centred on Lope's dramaturgy of the New World, specifically the discourse in favour of the Conquest, and its opposite, the discourse in favour of the `Indian'. TERESA J. KIRSCHNER teaches in the Department of Spanish Studies at Simon Fraser University.