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Author: Stanley M. Flatté
Publisher:
ISBN:
Category :
Languages : en
Pages : 158
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Book Description
Author: Stanley M. Flatté
Publisher:
ISBN:
Category :
Languages : en
Pages : 158
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Book Description
Author: Roger Dashen
Publisher: Cambridge University Press
ISBN: 9780521142458
Category : Mathematics
Languages : en
Pages : 328
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Book Description
This 1979 book attempts to connect the known structure of the ocean volume with experimental results in long-range sound transmission through the theory of wave propagation and the path-integral approach. The book is written at the post-graduate level, but has been carefully organised to give experimenters a grasp of important results without undue mathematics.
Author: John A. Colosi
Publisher: Cambridge University Press
ISBN: 1107072344
Category : Mathematics
Languages : en
Pages : 443
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Book Description
In this book, key discoveries in the field of statistical ocean acoustics over the last 35 years are addressed with illustrations from ocean observations.
Author: Orest Diachok
Publisher: Springer Science & Business Media
ISBN: 9401584761
Category : Technology & Engineering
Languages : en
Pages : 424
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Book Description
Recent advances in the power of inversion methods, the accuracy of acoustic field prediction codes, and the speed of digital computers have made the full field inversion of ocean and seismic parameters on a large scale a practical possibility. These methods exploit amplitude and phase information detected on hydrophone/geophone arrays, thereby extending traditional inversion schemes based on time of flight measurements. Full field inversion methods provide environmental information by minimising the mismatch between measured and predicted acoustic fields through a global search of possible environmental parameters. Full Field Inversion Methods in Ocean and Seismo-Acoustics is the formal record of a conference held in Italy in June 1994, sponsored by NATO SACLANT Undersea Research Centre. It includes papers by NATO specialists and others. Topics covered include: · speed and accuracy of acoustic field prediction codes · signal processing strategies · global inversion algorithms · search spaces of environmental parameters · environmental stochastic limitations · special purpose computer architectures · measurement geometries · source and receiving sensor technologies.
Author: J. Potter
Publisher: Springer Science & Business Media
ISBN: 9401133123
Category : Science
Languages : en
Pages : 599
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Book Description
Fifteen years ago NATO organised a conference entitled 'Ocean Acoustic Modelling'. Many of its participants were again present at this variability workshop. One such participant. in concluding his 1975 paper, quoted the following from a 1972 literature survey: ' ... history presents a sad lack of communications between acousticians and oceanographers' Have we done any better in the last 15 years? We believe so, but only moderately. There is still a massive underdeveloped potential for acousticians and oceanographers to make significant progress together. Currently, the two camps talk together insufficiently even to avoid simple misun derstandings. such as those in Table 1. Table 1 Ocsanographic and acoustic jargon (from an idea by Pol/ardi Jargon Oceanographic use Acoustic use dbordB decibar (depth in m) decibel (energy level) PE primitive equations parabolic equations convergence zone converging currents converging rays (downwelling water) (high energy density) front thermohaline front wave, ray or time front speed water current speed sound propagation speed 1 The list goes on.
Author: Marc Le Menn
Publisher: John Wiley & Sons
ISBN: 1848213794
Category : Science
Languages : en
Pages : 416
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Book Description
Through research, physical oceanography aims to solve the numerous problems stated by thermal, optical and dynamical properties of the oceans. Instrumentation and Metrology in Physical Oceanography describes the means used in oceanography to determine physical properties of the oceans by medium of in situ measurements. This book explores the theoretical functioning of sensors and instruments, as well as different practical aspects of using these tools. The content of this book appeals directly to technicians or engineers wishing to enhance their knowledge of instrumentation and application to environment surveillance. Instrumentation and Metrology in Physical Oceanography details the functioning of sensors and instruments used to assess the following parameters in oceanography: temperature, conductivity, pressure, sound velocity, current in magnitude and direction, time and position with GPS, height of water and tide, waves, optical and chemical properties (turbidity), dissolved gas (O2, CO2), pH, nutrients and other dissolved elements. Furthermore, this book also elaborates on the different means used to obtain measurements at sea (boats, drifting floats, moorings, undersea platforms, gliders...) and techniques currently being developed.
Author: Muneendra Kumar
Publisher: Springer Science & Business Media
ISBN: 9400938853
Category : Science
Languages : en
Pages : 464
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Book Description
The International Symposium on Marine Positioning (INSMAP) was conceived by the Marine Geodesy Committee at OCEANS 84, Washington, DC. It became clear at that time, that timing is appropriate to focus attention on individual specific problem areas under the broad umbrella of Marine Geodesy. After scheduling INSMAP 86 by the Marine Technology Society, we were fortunate to generate strong support from our co-sponsor s. All their assis tance and support are gra tefully acknowledged. Our special thanks are expressed to the U.S. Geological Survey; Charting and Geodetic Services, NOS/NOAA; Office of Naval Research, and Naval Ocean Research and Development Activity for their support through financial grants (ONR No. N00014-86-G-0107, NOS/NOAA No. 40AANC601637, and USGS No. 14-08-0001-G1207) as par tial funding to the INS MAP 86. We are al so gra teful to the U.S. Geological Survey for providing the auditorium and other logistic support in making the symposium a success. A total of 165 persons attended INSMAP 86, of which 20 percent were from outside the United States. Nine technical sessions and five special workshops were held wi thin a four-day forma t. Invited speakers included Dr. Alan Berman, Dean, Rosensteil School of Marine and Atmospheric Sciences; RADM J. R. Seeshol tz, Oceanographer of the U.S. Navy; RADM John D. Bossler, Director of Charting and Geodetic Services, NOS/NOAA; Mr. Chris von Al t, Woods Hole Oceanographic Institute; and RADM L. H. van Opstal, Hydrographer of the Royal Dutch Navy.
Author: L. Bjørnø
Publisher: Springer Science & Business Media
ISBN: 9400984472
Category : Science
Languages : en
Pages : 730
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Book Description
The comprehensive research activity around the World in the fields of Underwater Acoustics and Signal Processing being strongly supported by new experimental technique and equipment and by the parallel fast developments in computer technology and solid state devices, which has led to a rapidly reducing cost of digital processing thus enabling more complex processing to be carried out economically, emphasize how necessary it is at intervals of a few years through a NATO Advanced Study Institute (NATO ASI) and guided by leading experts to study the conquests in the fields of Underwater Acoustics and Signal Processing. This need of study is moreover stressed by the interdisciplina rity of Underwater Acoustics and Signal Processing, where a strong impact from other branches of science, - Geophysics, Radioastronomy, Bioengineering, Telecommunication, Seismology, Space Research etc. - is taking place, which makes it an extre mely difficult task for scientists to follow-up the development in all its phases and to preserve the general view of its rapid ly increasing number of possibilities. The present Proceedings of the NATO ASI held in Copenhagen during August 1980 join the series of proceedings of NATO summer schools on Underwater Acoustics and Signal Processing held during the past 20 years. The equality and the fusion of the individual research fields of Underwater Acoustics and Signal Processing and the separate introduction of advanced research results from other scientific areas related to underwater acoustics such as transducers characterize the subject matter of this NATO ASI.
Author: Albert C. J. Luo
Publisher: Springer Science & Business Media
ISBN: 3642127185
Category : Science
Languages : en
Pages : 312
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Book Description
“Hamiltonian Chaos Beyond the KAM Theory: Dedicated to George M. Zaslavsky (1935—2008)” covers the recent developments and advances in the theory and application of Hamiltonian chaos in nonlinear Hamiltonian systems. The book is dedicated to Dr. George Zaslavsky, who was one of three founders of the theory of Hamiltonian chaos. Each chapter in this book was written by well-established scientists in the field of nonlinear Hamiltonian systems. The development presented in this book goes beyond the KAM theory, and the onset and disappearance of chaos in the stochastic and resonant layers of nonlinear Hamiltonian systems are predicted analytically, instead of qualitatively. The book is intended for researchers in the field of nonlinear dynamics in mathematics, physics and engineering. Dr. Albert C.J. Luo is a Professor at Southern Illinois University Edwardsville, USA. Dr. Valentin Afraimovich is a Professor at San Luis Potosi University, Mexico.
Author: Herman Medwin
Publisher: Academic Press
ISBN: 0080532160
Category : Science
Languages : en
Pages : 739
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Book Description
The developments in the field of ocean acoustics over recent years make this book an important reference for specialists in acoustics, oceanography, marine biology, and related fields. Fundamentals of Acoustical Oceanography also encourages a new generation of scientists, engineers, and entrepreneurs to apply the modern methods of acoustical physics to probe the unknown sea. The book is an authoritative, modern text with examples and exercises. It contains techniques to solve the direct problems, solutions of inverse problems, and an extensive bibliography from the earliest use of sound in the sea to present references.Written by internationally recognized scientists, the book provides background to measure ocean parameters and processes, find life and objects in the sea, communicate underwater, and survey the boundaries of the sea. Fundamentals of Acoustical Oceanography explains principles of underwater sound propagation, and describes how both actively probing sonars and passively listening hydrophones can reveal what the eye cannot see over vast ranges of the turbid ocean. This book demonstrates how to use acoustical remote sensing, variations in sound transmission, in situ acoustical measurements, and computer and laboratory models to identify the physical and biological parameters and processes in the sea.* Offers an integrated, modern approach to passive and active underwater acoustics* Contains many examples of laboratory scale models of ocean-acoustic environments, as well as descriptions of experiments at sea* Covers remote sensing of marine life and the seafloor* Includes signal processing of ocean sounds, physical and biological noises at sea, and inversions* resents sound sources, receivers, and calibration* Explains high intensities; explosive waves, parametric sources, cavitation, shock waves, and streaming* Covers microbubbles from breaking waves, rainfall, dispersion, and attenuation* Describes sound propagation along ray paths and caustics* Presents sound transmissions and normal mode methods in ocean waveguides
