Underwater wireless sensor networks (UWSN) are envisioned as an aquatic medium for a variety of applications including oceanographic data collection, disaster management or prevention, assisted navigation, attack protection, and pollution monitoring. Similar to terrestrial wireless sensor networks (WSN), UWSNs consist of sensor nodes that collect the information and pass it to a base station; however, researchers have to face many challenges in executing the network in an aquatic medium. Energy-Efficient Underwater Wireless Communications and Networking is a crucial reference source that covers existing and future possibilities of the area as well as the current challenges presented in the implementation of underwater sensor networks. While highlighting topics such as digital signal processing, underwater localization, and acoustic channel modeling, this publication is ideally designed for machine learning experts, IT specialists, government agencies, oceanic engineers, communication experts, researchers, academicians, students, and environmental agencies concerned with optimized data flow in communication network, securing assets, and mitigating security attacks.

What is sound design? What is its function in the early 21st century and into the future? Sound Works examines these questions in four parts: Part 1, "Why This Sound?", presents an overview of the modern history of sound design. Part 2 is highly visual and provides a glance onto a sound designer's workbench and the current state of "Sonic Labor." Part 3 uses cultural analysis to explore our contemporary "Living with Sounds." The final and fourth part then proposes a series of anthropological and political interpretations of how “Sound Works” today. This book is not a manual on sound design; it instead argues for a cultural theory of sound design for sound designers and sound artists, for clients who commission a sound design and for researchers in the fields of sound studies, design research, and cultural studies

Excerpt from Die Drahtlose Telegraphie und Ihr Einfluss auf den Wirtschaftsverkehr Unter Besonderer Ber cksichtigung des Systems "Telefunken" Mit Einem Verzeichnis der Patente und Literaturangaben ber Drahtlose Telegraphie Die im nun folgenden Abschnitt enthaltene Be schreibung ber Einf hrung der drahtlosen Telegraphie, namentlich im deutschen Heere, und die Wiedergabe authentischer Berichte ber gutes Funktionieren der Milit r stationen d rften noch dazu beitragen, die Sicherheit und Handlichkeit des drahtlosen Nachrichtenverkehrs beson ders zu charakterisieren. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

This second volume of the series Lectures in Optics develops a thorough presentation of geometrical optics effects. The book begins by discussing refraction and reflection off single surfaces, both flat and spherical. Presented next are the essential building elements, optical power and beam vergence, which are paramount in imaging because the incident vergence is added to the element’s power to produce the vergence leaving the optical element. Imaging definitions and formulation are covered next, followed by the power configurations and imaging arrangements possible with a single element, a single lens, and a mirror for real and virtual objects. Next, two more parameters are introduced: the extent of an element along the optical axis (thick lenses and lens systems) and the extent of an element perpendicular to the optical axis (stops and pupils). The way image quality is affected by the transverse restriction of light is then discussed, including resolution and image blur. Finally, the book introduces the concepts of optical aberrations as a consequence of a violation of the paraxial approximations. This book is suitable for all Geometrical Optics courses at college, graduate school, or professional school levels, such as physics, engineering, visual science, or optometry programs. Comprehensive practice examples, exercises, and quizzes throughout the chapters reinforce an understanding of the covered material.

Technologies in today's society are rapidly developing at a pace that is challenging to stay up to date with. As an increasing number of global regions are implementing smart methods and strategies for sustainable development, they are continually searching for modern advancements within computer science, sensor networks, software engineering, and smart technologies. A compilation of research is needed that displays current applications of computing methodologies in the progression of global cities and how smart technologies are being utilized. Sensor Network Methodologies for Smart Applications is a collection of innovative research on the methods of intelligent systems and technologies and their various applications within sustainable development practices. While highlighting topics including machine learning, network security, and optimization algorithms, this book is ideally designed for researchers, scientists, developers, programmers, engineers, educators, policymakers, geographers, planners, and students seeking current research on smart technologies and sensor networks.