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Underwater Visual Communication

Underwater Visual Communication
Author: Forrest L. Dimmick
Publisher:
Total Pages: 26
Release: 1960
Genre: Underwater light
ISBN:

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A preliminary survey was made of the value of using light in the blue range as a means for underwater communication. A discussion of the many factors involved is presented, as well as five examples of the combination of factors of transmission, emission, and sensitivity for a single layer of Continental Slope sea water of 66-foot depth, two types of illumination source, and sensitivity in daylight and in semi-darkness. There are certain advantages in using light from the blue and blue-green portion of the spectrum. These advantages increase as the absolute amount of blue light emitted by the source is increased, the distance the light must travel through the water is increased, and the lower the general illumination in the water happens to be.


Visual Perception and Control of Underwater Robots

Visual Perception and Control of Underwater Robots
Author: Junzhi Yu
Publisher: CRC Press
Total Pages: 166
Release: 2021-03-01
Genre: Technology & Engineering
ISBN: 1000346617

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Visual Perception and Control of Underwater Robots covers theories and applications from aquatic visual perception and underwater robotics. Within the framework of visual perception for underwater operations, image restoration, binocular measurement, and object detection are addressed. More specifically, the book includes adversarial critic learning for visual restoration, NSGA-II-based calibration for binocular measurement, prior knowledge refinement for object detection, analysis of temporal detection performance, as well as the effect of the aquatic data domain on object detection. With the aid of visual perception technologies, two up-to-date underwater robot systems are demonstrated. The first system focuses on underwater robotic operation for the task of object collection in the sea. The second is an untethered biomimetic robotic fish with a camera stabilizer, its control methods based on visual tracking. The authors provide a self-contained and comprehensive guide to understand underwater visual perception and control. Bridging the gap between theory and practice in underwater vision, the book features implementable algorithms, numerical examples, and tests, where codes are publicly available. Additionally, the mainstream technologies covered in the book include deep learning, adversarial learning, evolutionary computation, robust control, and underwater bionics. Researchers, senior undergraduate and graduate students, and engineers dealing with underwater visual perception and control will benefit from this work.


Encyclopedia of Marine Mammals

Encyclopedia of Marine Mammals
Author: William F. Perrin
Publisher: Academic Press
Total Pages: 1355
Release: 2009-02-26
Genre: Science
ISBN: 0080919936

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This thorough revision of the classic Encyclopedia of Marine Mammals brings this authoritative book right up-to-date. Articles describe every species in detail, based on the very latest taxonomy, and a host of biological, ecological and sociological aspects relating to marine mammals. The latest information on the biology, ecology, anatomy, behavior and interactions with man is provided by a cast of expert authors – all presented in such detail and clarity to support both marine mammal specialists and the serious naturalist. Fully referenced throughout and with a fresh selection of the best color photographs available, the long-awaited second edition remains at the forefront as the go-to reference on marine mammals. More than 20% NEW MATERIAL includes articles on Climate Change, Pacific White-sided Dolphins, Sociobiology, Habitat Use, Feeding Morphology and more Over 260 articles on the individual species with topics ranging from anatomy and behavior, to conservation, exploitation and the impact of global climate change on marine mammals New color illustrations show every species and document topical articles FROM THE FIRST EDITION “This book is so good...a bargain, full of riches...packed with fascinating up to date information. I recommend it unreservedly it to individuals, students, and researchers, as well as libraries." --Richard M. Laws, MARINE MAMMALS SCIENCE "...establishes a solid and satisfying foundation for current study and future exploration" --Ronald J. Shusterman, SCIENCE


Underwater

Underwater
Author: Yuan Zheng
Publisher:
Total Pages: 0
Release: 2021
Genre: Computer animation
ISBN:

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"This thesis seeks to highlight the importance of work-life balance to our mental health. By experiencing an imbalanced life from the first-person view, this thesis focuses on using an abstract visual style to present the character’s inner world and the desperation for relaxation."--Abstract.


Energy-Efficient Underwater Wireless Communications and Networking

Energy-Efficient Underwater Wireless Communications and Networking
Author: Nitin Goyal
Publisher: Engineering Science Reference
Total Pages: 368
Release: 2020
Genre: Signals and signaling, Submarine
ISBN: 9781799836414

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"This book covers existing and future possibilities of the area as well as the current challenges presented in the implementation of underwater sensor networks"--


Underwater Acoustic Sensor Networks

Underwater Acoustic Sensor Networks
Author: Yang Xiao
Publisher: CRC Press
Total Pages: 352
Release: 2010-05-19
Genre: Computers
ISBN: 1420067125

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A detailed review of underwater channel characteristics, Underwater Acoustic Sensor Networks investigates the fundamental aspects of underwater communication. Prominent researchers from around the world consider contemporary challenges in the development of underwater acoustic sensor networks (UW-ASNs) and introduce a cross-layer approach for effec


Sensory Abilities of Cetaceans

Sensory Abilities of Cetaceans
Author: Jeanette A. Thomas
Publisher: Springer Science & Business Media
Total Pages: 736
Release: 1991-01-31
Genre: Science
ISBN: 9780306436956

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This book evolved through the efforts of several organizations and the dedication of many individuals. In 1987, we received arequest to propose a workshop topic for the Fifth International Theriological Congress (ITC) to be held in August 1989 in Rome, Italy. After looking up the meaning of the word "theriological" in the dictionary and discovering that it pertains to mammalian behavior, we decided a symposium on sensory abilities of whales and dOlphins would be an interesting topic. The ITC convenes only every five years and has the distinction of being very weIl attended by scientists from around the world. We thought that hosting a workshop in conjunction with the ITC would attract a variety of international scientists that rarely have the opportunity to interact. Fortunately for all involved, our prediction was correct. The first two days of the workshop, 23-24 August 1989, were held in conjunction with ITC and the nearly 1,000 attending scientists were able to view our posters and listen to lectures. The third day was limited to only ab out 65 invited scientists who were divided into topical working groups chaired by a rapporteur.


Cetacean Societies

Cetacean Societies
Author: Janet Mann
Publisher: University of Chicago Press
Total Pages: 462
Release: 2000-06
Genre: Science
ISBN: 9780226503417

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"Part review, part testament to extraordinary dedication, and part call to get involved, Cetacean Societies highlights the achievements of behavioral ecologists inspired by the challenges of cetaceans and committed to the exploration of a new world."—from the preface by Richard Wrangham Long-lived, slow to reproduce, and often hidden beneath the water's surface, whales and dolphins (cetaceans) have remained elusive subjects for scientific study even though they have fascinated humans for centuries. Until recently, much of what we knew about cetaceans came from commercial sources such as whalers and trainers for dolphin acts. Innovative research methods and persistent efforts, however, have begun to penetrate the depths to reveal tantalizing glimpses of the lives of these mammals in their natural habitats. Cetacean Societies presents the first comprehensive synthesis and review of these new studies. Groups of chapters focus on the history of cetacean behavioral research and methodology; state-of-the-art reviews of information on four of the most-studied species: bottlenose dolphins, killer whales, sperm whales, and humpback whales; and summaries of major topics, including group living, male and female reproductive strategies, communication, and conservation drawn from comparative research on a wide range of species. Written by some of the world's leading cetacean scientists, this landmark volume will benefit not just students of cetology but also researchers in other areas of behavioral and conservation ecology as well as anyone with a serious interest in the world of whales and dolphins. Contributors are Robin Baird, Phillip Clapham, Jenny Christal, Richard Connor, Janet Mann, Andrew Read, Randall Reeves, Amy Samuels, Peter Tyack, Linda Weilgart, Hal Whitehead, Randall S. Wells, and Richard Wrangham.


Underwater Acoustic Digital Signal Processing and Communication Systems

Underwater Acoustic Digital Signal Processing and Communication Systems
Author: Robert Istepanian
Publisher: Springer
Total Pages: 0
Release: 2010-12-03
Genre: Technology & Engineering
ISBN: 9781441948823

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Underwater acoustic digital signal processing and communications is an area of applied research that has witnessed major advances over the past decade. Rapid developments in this area were made possible by the use of powerful digital signal processors (DSPs) whose speed, computational power and portability allowed efficient implementation of complex signal processing algorithms and experimental demonstration of their performance in a variety of underwater environments. The early results served as a motivation for the development of new and improved signal processing methods for underwater applications, which today range from classical of autonomous underwater vehicles and sonar signal processing, to remote control underwater wireless communications. This book presents the diverse areas of underwater acoustic signal processing and communication systems through a collection of contributions from prominent researchers in these areas. Their results, both new and those published over the past few years, have been assembled to provide what we hope is a comprehensive overview of the recent developments in the field. The book is intended for a general audience of researchers, engineers and students working in the areas of underwater acoustic signal processing. It requires the reader to have a basic understanding of the digital signal processing concepts. Each topic is treated from a theoretical perspective, followed by practical implementation details. We hope that the book can serve both as a study text and an academic reference.


The Underwater World for Digital Data Transmission

The Underwater World for Digital Data Transmission
Author: Parikshit N. Mahalle
Publisher: Springer Nature
Total Pages: 67
Release: 2021-05-06
Genre: Technology & Engineering
ISBN: 9811613079

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This book covers all small details about Underwater Sensor Networks (UWSN). Researchers can use this book as a prerequisite before starting any research on underwater networks or underwater applications. This book covers the introduction, challenges, different architectural models for UWSN, various attacks on UWSN, underwater applications, and networking layers. The target audience includes professors and students in engineering, and researchers and engineers working on marine applications. In academic level, the book is helpful for students having Networking and Information Security as elective subject and doing projects in Wireless Networks. It is also helpful for spostgraduates and Ph.D. researchers to learn basics of Underwater Sensor Networks.