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Celebrating the theme 'Shared heritage', IKUWA6 (the 6th International Congress for Underwater Archaeology), was the first such major conference to be held in the Asia-Pacific region, and the first IKUWA meeting hosted outside Europe since the organisation's inception in Germany in the 1990s. A primary objective of holding IKUWA6 in Australia was to give greater voice to practitioners and emerging researchers across the Asia and Pacific regions who are often not well represented in northern hemisphere scientific gatherings of this scale; and, to focus on the areas of overlap in our mutual heritage, techniques and technology. Drawing together peer-reviewed presentations by delegates from across the world who converged in Fremantle in 2016 to participate, this volume covers a stimulating diversity of themes and niche topics of value to maritime archaeology practitioners, researchers, students, historians and museum professionals across the world.

Underwater archaeology.

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This popular-science book tells the story of one of the most important, but least known major archaeological sites in Europe: Doggerland. Few people know that the beaches along the North Sea lie on the edge of a vast lost world. A prehistoric landscape that documents almost a million years of human habitation and lay dry for most of that time. Doggerland is where early hominids left the first footprints in northern Europe, more than 900,000 years ago. Later, for hundreds of thousands of years, it was the scene of ice ages. A world of woolly mammoths and rhinoceroses, horses and reindeer and the successful Neanderthals who hunted them, including Krijn: the first Neanderthal from Doggerland. At the end of the last Ice Age, the first modern humans also left their traces here, including the famous Leman-and-Ower-Banks spearhead - the first documented Doggerland find - and some of the oldest art in the region. With the onset of the Holocene, our current era, Doggerland's inhabitants were increasingly confronted with climate change and rising sea levels, just as we are today. The Mesolithic hunter-gatherers lived in a rich, but constantly changing world - to which they successfully adapted. Ongoing submergence and a huge tsunami around 6150 BC marked the beginning of the end. A few centuries later, the last islands disappeared under the waves and with them the story of Doggerland was lost in time. This book brings this vanished world back to the surface.

Antiquities. --- Antiquities, Prehistoric. --- Underwater archaeology.

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For the latest twenty to thirty years, a significant number of AUVs has been created for the solving of wide spectrum of scientific and applied tasks of ocean development and research. For the short time period the AUVs have shown the efficiency at performance of complex search and inspection works and opened a number of new important applications. Initially the information about AUVs had mainly review-advertising character but now more attention is paid to practical achievements, problems and systems technologies. AUVs are losing their prototype status and have become a fully operational, reliable and effective tool and modern multi-purpose AUVs represent the new class of underwater robotic objects with inherent tasks and practical applications, particular features of technology, systems structure and functional properties.

Autonomous underwater vehicles --- Dynamics. --- AUVs (Autonomous underwater vehicles) --- Underwater robotic vehicles --- Unmanned submersibles --- Unmanned undersea vehicles --- Unmanned underwater vehicles --- Automated vehicles --- Submersibles --- Automotive technology & trades

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Water covers approximately 71% of the planet's surface and human activities have been relying on it since remote times. Many traces of these exist under the "zero level" and will continue to exist in the future. Measuring, positioning, and mapping objects under water have experienced very significant modifications, brought about by advances in technology and also by changed requirements, demands for new products, introduction of new tools, and the modification of existing equipment. The exploration, documentation, and recording of underwater environments remains a difficult task, and is sometimes still unsolved. The research, design, and development of techniques and procedures for correctly validating underwater environments are more than ever important.This Special Issue originates from the ISPRS/CIPA Workshop "UNDERWATER 3D RECORDING & MODELING--Experiences in Data Acquisition, Calibration, Orientation, Modelling & Accuracy Assessment" (http://3dom.fbk.eu/files/underwater/index.html) and will accept improved and extended selected papers derived from the workshop's proceedings, as well as new contributions from international colleagues.We invite you to submit articles on the following topics:Underwater/Multi-media photogrammetryUnderwater platforms (ROV, AUV, robot, etc.)Characterization of underwater passive and active sensorsUnderwater navigation and positioningUnderwater metrology and inspectionsGeometric modeling in multi-media photogrammetryAccuracy requirement and assessment in underwater 3D applicationsRestoration, enhancement and processing of underwater images3D bathymetry techniquesData processing and underwater 3D modelingSensors for marine biology and water pollutionMulti-sensor integration.

Three-dimensional imaging. --- Autonomous underwater vehicles. --- Cameras.

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The book presents a broad-scope analysis of piezoelectric electromechanical transducers and the related aspects of practical transducer design for underwater applications. It uses an energy method for analyzing transducer problems that provides the physical insight important for the understanding of electromechanical devices. Application of the method is first illustrated with transducer examples that can be modeled as systems with a single degree of freedom, (such as spheres, short cylinders, bars and flexural disks and plates made of piezoelectric ceramics). Thereupon, transducers are modeled as devices with multiple degrees of freedom. In all these cases, results of modeling are presented in the form of equivalent electromechanical circuits convenient for the calculation of the transducers’ operational characteristics. Special focus is made on the effects of coupled vibrations in mechanical systems on transducer performance. The book also provides extensive coverage of acoustic radiation including acoustic interaction between the transducers. The book is inherently multidisciplinary. It provides essential background regarding the vibration of elastic passive and piezoelectric bodies, piezoelectricity, acoustic radiation, and transducer characterization. Scientists and engineers working in the field of electroacoustics and those involved in education in the field will find this material useful not only for underwater acoustics, but also for electromechanics, energy conversion and medical ultrasonics. Part II contains general information on vibration of mechanical systems, electromechanical conversion in the deformed piezoceramic bodies, and acoustic radiation that can be used independently for treatment transducers of different type.

Piezoelectric transducers. --- Underwater acoustics. --- Technology & Engineering / Acoustics & Sound. --- Acoustic Transduction. --- electroacoustics. --- electromechanical circuits. --- piezoelectric transducers. --- underwater sound. --- Acoustics, Underwater --- Hydroacoustics --- Underwater sound --- Fluids --- Sound --- Piezoelectric devices --- Transducers --- Acoustic properties