Author: Tarun Kishore KapoorPublisher:
ISBN:
Category :
Languages : en
Pages : 392
Book Description
Three-dimensional Acoustic Scattering from Arctic Ice Proturberances
Author: Tarun Kishore KapoorPublisher:
ISBN:
Category :
Languages : en
Pages : 392
Book Description
Measuring Ocean Currents
Author: Antony JosephPublisher: Newnes
ISBN: 0123914280
Category : Science
Languages : en
Pages : 447
Book Description
Measuring Ocean Currents: Tools, Technologies, and Data covers all major aspects of ocean current measurements in view of the implications of ocean currents on changing climate, increasing pollution levels, and offshore engineering activities. Although more than 70% of the Earth is covered by ocean, there is limited information on the countless fine- to large-scale water motions taking place within them. This book fills that information gap as the first work that summarizes the state-of-the-art methods and instruments used for surface, subsurface, and abyssal ocean current measurements. Readers of this book will find a wealth of information on Lagrangian measurements, horizontal mapping, imaging, Eulerian measurements, and vertical profiling techniques. In addition, the book describes modern technologies for remote measurement of ocean currents and their signatures, including HF Doppler radar systems, satellite-borne sensors, ocean acoustic tomography, and more. Crucial aspects of ocean currents are described in detail as well, including dispersion of effluents discharged into the sea and transport of beneficial materials—as well as environmentally hazardous materials—from one region to another. The book highlights several important practical applications, showing how measurements relate to climate change and pollution levels, how they affect coastal and offshore engineering activities, and how they can aid in tsunami detection. - Coverage of measurement, mapping and profiling techniques - Descriptions of technologies for remote measurement of ocean currents and their signatures - Reviews crucial aspects of ocean currents, including special emphasis on the planet-spanning thermohaline circulation, known as the ocean's "conveyor belt," and its crucial role in climate change
Direct and Inverse Acoustic Scattering Problems for a Class of Three-dimensional Waveguides
Author: Miao-jung OuPublisher:
ISBN:
Category : Ocean waves
Languages : en
Pages : 228
Book Description
Three Dimensional Experimental Study of Acoustic-elastic Wave Scattering and Diffraction
Author: Charles Edward ShepherdPublisher:
ISBN:
Category : Acoustic emission
Languages : en
Pages : 146
Book Description
Dissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 812
Book Description
Direct and Inverse Acoustic Scattering for Three-dimensional Surfaces
Author: Andreas KleefeldPublisher:
ISBN:
Category : Integral equations
Languages : en
Pages : 336
Book Description
Coupled-mode Modelling of Acoustic Scattering from Three-dimensional, Axisymmetric Objects
Author: John A. FawcettAcoustics Abstracts
Author: Quantifying Three Dimensional Effects in Acoustic Rough Surface Scattering
Author: Sumedh Mohan JoshiPublisher:
ISBN:
Category :
Languages : en
Pages : 172
Book Description
Interface roughness can have a significant effect on the scattering of sound energy, and therefore an understanding of the effects of roughness is essential to making predictions of sound propagation and transmission underwater. Many models of roughness scattering currently in use are two dimensional (2D) in nature; three dimensional (3D) modeling requires significantly more time and computational resources. In this work, an effort is made to quantify the effects of 3D scattering in order to assess whether or under what conditions 3D modeling is necessary. To that end, an exact 3D roughness scattering model is developed based on a commercially available finite element package. The finite element results are compared with two approximate scattering models (the Kirchhoff approximation and first order perturbation theory) to establish the validity and regimes of applicability of each. The rough surfaces are realizations generated from power spectra measured from the sea floor. However, the surfaces are assumed to be pressure release (as on an air-water interface). Such a formulation is nonphysical, but allows the assessment of the validity of the various modeling techniques which is the focus of this work. The comparison between the models is made by calculating the ensemble average of the scattering from realizations of randomly rough surfaces. It is shown that a combination of the Kirchhoff approximation and perturbation theory models recovers the 3D finite element solution.
Acoustics and elastodynamic scattering by thin, three-dimensional objects
Author: Lars PetersonPublisher:
ISBN: 9789170324321
Category : Elastic waves
Languages : en
Pages : 24
Book Description