Robert W. Tkach's Books

Optical Fiber Telecommunications VIB

Chapter 1. Fiber Nonlinearity and Capacity: Single-Mode and Multimode Fibers

By: René-Jean Essiambre,Robert W. Tkach,Roland Ryf

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Optical Fiber Telecommunications VIB

Chapter 1. Fiber Nonlinearity and Capacity: Single-Mode and Multimode Fibers

By: René-Jean Essiambre,Robert W. Tkach,Roland Ryf

This chapter starts by providing some statistics on traffic demand in optical networks and the capacity scaling over time of commercial optical communication systems. Next there is a brief review of the basic results of information theory. We then describe the stochastic nonlinear Schrödinger equation (SNSE), the equation that governs nonlinear propagation in SMFs. This is followed by calculations of nonlinear capacity limit estimates for the SSMF, and advanced fibers with improved transmission characteristics are then presented along with an analytical formula of nonlinear capacity. We then introduce a set of coupled partial differential equations (PDEs) describing nonlinear propagation of polarization-division multiplexed (PDM) signals in SMFs along with nonlinear capacity estimates for these systems. This followed by a focus on multimode fibers (MMFs) and multicore fibers (MCFs). The rest of the chapter then focuses on nonlinear effects in MMFs and MCFs, with an emphasis on MMFs and FMFs. The chapter concludes by reporting experimental observations of two important effects involving nonlinear effects between spatial modes: inter-modal cross-phase modulation (IM-XPM) and inter-modal four-wave mixing (IM-FWM).

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Elsevier Inc. Chapters

Published Date

ISBN 10

0128060735

ISBN 13

9780128060735

With Their Backs to the Mountains

A History of Carpathian Rus' and Carpatho-Rusyns

By: Paul Robert Magocsi

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With Their Backs to the Mountains

A History of Carpathian Rus' and Carpatho-Rusyns

By: Paul Robert Magocsi

This is a history of a stateless people, the Carpatho-Rusyns, and their historic homeland, Carpathian Rus', located in the heart of central Europe. At the present, when it is fashionable to speak of nationalities as "imagined communities" or as transnational constructs "created" by intellectuals\ elites who may live in the historic "national" homeland or in the diaspora, Carpatho-Rusyns provide an ideal example of a people made—or some would say still being made—before our very eyes. The book traces the evolution of Carpathian Rus' from earliest pre-historic times to the present and the complex manner in which a distinct Carpatho-Rusyn people, since the mid-nineteenth century, came into being, disappeared, and then re-appeared in the wake of the revolutions of 1989 and the collapse of Communist rule in central and eastern Europe.

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564

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Central European University Press

Published Date

ISBN 10

9633861071

ISBN 13

9789633861073

Secret Chamber Revisited

The Quest for the Lost Knowledge of Ancient Egypt

By: Robert Bauval

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Secret Chamber Revisited

The Quest for the Lost Knowledge of Ancient Egypt

By: Robert Bauval

A firsthand, behind-the-scene account of the controversies surrounding modern explorations at Giza • Investigates the recent scandals at Giza and claims of secret excavations and tunneling inside the Great Pyramid • Reveals the historical evidence in support of secret chambers in the Great Pyramid and beneath the Great Sphinx • Exposes the secret agendas behind the latest explorations on the Giza plateau Since 1993 Robert Bauval has been embroiled in the many controversies involving the search for the lost treasures of the pyramid builders and the quest for the legendary Hall of Records of Atlantis. The strange but true story that he unfolds implicates American business moguls, the prestigious National Geographic Society, several Ivy League universities, the Edgar Cayce Foundation, the Freemasons, Christian fundamentalists, Zionists, and the Egyptian government. In this fully updated edition of Secret Chamber, including new color photographs, Robert Bauval pursues his in-depth investigation of clandestine events at Giza and the role played by the controversial ex-Minister of Antiquities Dr. Zahi Hawass. What lies behind the mysterious doors at the end of the star shafts in the Great Pyramid? What do the mysterious inscriptions found behind the Gantenbrink door mean? What is the real purpose of the Relief Chambers and the red ochre “graffiti” in them? Who is behind the secretly tunneling and excavating in these chambers, and why? Is there really a hidden Hall of Records from Atlantis beneath the Great Sphinx? Is the Great Pyramid just a tomb or does it serve a higher purpose involving a lost science of immortality? Why do the ancient texts ascribe the Pyramid’s design to the supreme god of wisdom Thoth, the writer of the fabled Books of Hermes? Will the Great Pyramid prove to be the “missing link” to our true origins or a “metaphysical machine” to access the world beyond? Providing a firsthand account of the strange events that have taken place at the Giza plateau in the last three decades, Bauval reveals the hidden agendas behind these events and raises important questions about the meaning of Egypt’s ancient structures and the very origins of civilization.

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Page Count

428

Publisher

Simon and Schuster

Published Date

ISBN 10

1591437741

ISBN 13

9781591437741

Book's by Robert W. Tkach

Optical Fiber Telecommunications VIB

Optical Fiber Telecommunications VIB

With Their Backs to the Mountains

With Their Backs to the Mountains

Secret Chamber Revisited

Secret Chamber Revisited

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