The Church’s Year, as it has been known for many centuries throughout Christendom, is characterised, first, by the weekly festival of the Lord’s Day (a feature which dates from the dawn of the Church’s life and the age of the Apostles) and, secondly, by the annual recurrence of fasts and festivals, of certain days and certain seasons of religious observance. These latter emerged, and came to find places in the Kalendar at various periods. In order of time the season of the Pascha, the comm...

The Evolution of Calendars: 7 Classic Books on Cultural Timekeeping surveys the human effort to order celestial cycles, ritual observances, civic life, and historical memory. Moving among antiquarian inquiry, philosophical reflection, religious prose, scientific observation, essays, and imaginative literature, the volume situates calendars as cultural instruments rather than mere tables of dates. Its range illuminates the enduring tension between astronomical regularity and the social mean...

In "The Church Year and Kalendar," John Dowden presents a meticulous exploration of the Christian liturgical calendar, offering readers a profound understanding of its rhythms and significance throughout the ecclesiastical year. Written in a clear, accessible style, the book deftly navigates the historical evolution and theological dimensions of the calendar, while intertwining rich narratives and practices associated with each season. Dowden's comprehensive approach situates the calendar ...

The revised edition of this important reference volume presents an expanded overview of the analytical and numerical approaches employed when exploring and developing modern laser materials processing techniques. The book shows how general principles can be used to obtain insight into laser processes, whether derived from fundamental physical theory or from direct observation of experimental results. The book gives readers an understanding of the strengths and limitations of simple numeric...

Spectroscopy is the principal tool used in astronomy to investigate the Universe beyond Earth's atmosphere. Through the analysis of electromagnetic radiation, spectrographs enable observers to assess the chemical composition, kinematics and local physical properties of distant stars, nebulae and galaxies. Thoroughly illustrated and clearly written, this handbook offers a practical and comprehensive guide to the different spectroscopic methods used in all branches of astronomy, at all wavel...

The field of astrometry, the precise measurement of the positions, distances and motions of astronomical objects, has been revolutionized in recent years. As we enter the high-precision era, it will play an increasingly important role in all areas of astronomy, astrophysics and cosmology. This edited text starts by looking at the opportunities and challenges facing astrometry in the twenty-first century, from space and ground. The new formalisms of relativity required to take advantage of ...

A comprehensive review of the state of the art and advances in the field, while also outlining the future potential and development trends of optical imaging and optical metrology, an area of fast growth with numerous applications in nanotechnology and nanophysics. Written by the world's leading experts in the field, it fills the gap in the current literature by bridging the fields of optical imaging and metrology, and is the only up-to-date resource in terms of fundamental knowledge, basi...

This reference book provides a fully integrated novel approach to the development of high-power, single-transverse mode, edge-emitting diode lasers by addressing the complementary topics of device engineering, reliability engineering and device diagnostics in the same book, and thus closes the gap in the current book literature.Diode laser fundamentals are discussed, followed by an elaborate discussion of problem-oriented design guidelines and techniques, and by a systematic treatm...

Optical coatings, including mirrors, anti-reflection coatings, beam splitters, and filters, are an integral part of most modern optical systems. Optical thin films and coatings provides an overview of thin film materials, the properties, design and manufacture of optical coatings and their use across a variety of application areas.Part one explores the design and manufacture of optical coatings. Part two highlights unconventional features of optical thin films including scattering properti...

This book delineates practical, tested, general methods for ultraviolet, visible, and infrared spectrometry in clear language for novice users, and serves as a reference resource for advanced spectroscopists. Applied Spectroscopy includes important information and equations which will be referred to regularly. The book emphasizes reflectance and color measurements due to their common usage in todays spectroscopic laboratories, and contains methods for selectinga measurement technique as we...

This 6th edition of “Tools of Radio Astronomy”, the most used introductory text in radio astronomy, has been revised to reflect the current state of this important branch of astronomy. This includes the use of satellites, low radio frequencies, the millimeter/sub-mm universe, the Cosmic Microwave Background and the increased importance of mm/sub-mm dust emission.Several derivations and presentations of technical aspects of radio astronomy and receivers, such as receiver noise, the ...

This second edition of the book, initially written as an introductory text dealing with how electric currents behave at the nanometer scale, begins with a general description of electric currents at the macroscale. Then by considering the physical length scales relevant to electron flow, it is observed how the behavior of currents varies as they approach the nanoscale. A quantum description of electric current is covered as well as its relevance, with particular reference to defects, grain...