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All-Optical Noninvasive Delayed Feedback Control of Semiconductor Lasers
The stabilization of unstable states hidden in the dynamics of a system, in particular the control of chaos, received much attention in the last years. In this work, a well-known control method called delayed feedback control is applied for the first time entirely in the all-optical domain. A multisection semiconductor laser receives optical feedback from an external Fabry-Perot interferometer. The control signal is a phase-tunable superposition of the laser signal, and provokes the laser to operate in an otherwise unstable periodic state with a period equal to the time delay. The control is noninvasive, because the reflected signal tends to zero when the target state is reached.
Harbinger
When a serial killer stalks the small New England settlement of Grover's Corner during the fall of 1586, it falls upon the shoulder's of a holy man, Brian Dreamweaver, to save his brother's widow, her two small children, the good townsfolk of Grover's Corner, and if God is willing, himself. The Harbinger is an ancient evil, a forerunner to the gates of hell opening. The path of the Harbinger is documented in a single book; the Grimoire. This book was hidden within the Church of England until it mysteriously disappeared, but no one seemed to mind, after all what harm can come from a book.
Praxis der Viszeralchirurgie
Moderne endokrine Chirurgie erfolgt immer in enger interdisziplinärer Zusammenarbeit mit Internisten, Nuklearmedizinern und Pathologen. Die chirurgisch relevanten Erkrankungen der endokrinen Organe sind mit allen Aspekten umfassend in diesem Buch dargestellt: Physiologie und Pathophysiologie der endokrinen Regelkreise, Diagnostik und interdisziplinäre Therapie, praxisorientierte detaillierte Empfehlungen zum Vorgehen und zur Verfahrenswahl. Alle Beiträge wurden dem aktuellen Stand angepasst und sind, wie in den Vorauflagen, von renommierten Autoren der beteiligten Fachgebiete verfasst.
