Proceedings of the Very Low Frequency (VLF) Ambient Noise Workshop Held in Stennis, Mississippi on 20-21 September 1988 PDF Download
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Author: Ronald A. Wagstaff Publisher: ISBN: Category : Languages : en Pages : 384
Book Description
A significant number of measurements of acoustic and ambient noise environmental data have been made over the past 15 years. Unfortunately, the processing, analysis, and reporting of these measurements have not been pursued at a commensurate level. It seems that there are always more funds available for measurement than for analysis. Hence, it is reasonable to assume that present data which have not received complete processing attention may contain some undiscovered gems that could be extremely valuable to a current program. Furthermore, these gems may be 'mined' at relatively low lost compared to the cost of fielding an experiment to reacquire the data. The key, of course, is to scrutinize the data very closely to determine if the potential for gems existing in the data is high, the quality of the storage medium is adequate, and the necessary ancillary information is available. This includes deployment logs, environmental measurements, and descriptions of measurement conditions that include factors influencing the processing and analysis of the data. An additional consideration, some corporate knowledge must still exist concerning the data. These concerns were the motivating factors for conducting this VLF ambient noise workshop. (RH).
Author: Ronald A. Wagstaff Publisher: ISBN: Category : Languages : en Pages : 384
Book Description
A significant number of measurements of acoustic and ambient noise environmental data have been made over the past 15 years. Unfortunately, the processing, analysis, and reporting of these measurements have not been pursued at a commensurate level. It seems that there are always more funds available for measurement than for analysis. Hence, it is reasonable to assume that present data which have not received complete processing attention may contain some undiscovered gems that could be extremely valuable to a current program. Furthermore, these gems may be 'mined' at relatively low lost compared to the cost of fielding an experiment to reacquire the data. The key, of course, is to scrutinize the data very closely to determine if the potential for gems existing in the data is high, the quality of the storage medium is adequate, and the necessary ancillary information is available. This includes deployment logs, environmental measurements, and descriptions of measurement conditions that include factors influencing the processing and analysis of the data. An additional consideration, some corporate knowledge must still exist concerning the data. These concerns were the motivating factors for conducting this VLF ambient noise workshop. (RH).
Author: Misac N. Nabighian Publisher: SEG Books ISBN: 1560800224 Category : Electromagnetic fields Languages : en Pages : 989
Book Description
As a slag heap, the result of strip mining, creeps closer to his house in the Ohio hills, fifteen-year-old M. C. is torn between trying to get his family away and fighting for the home they love.
Author: Paul C. Etter Publisher: CRC Press ISBN: 1466564946 Category : Technology & Engineering Languages : en Pages : 521
Book Description
Underwater Acoustic Modeling and Simulation, Fourth Edition continues to provide the most authoritative overview of currently available propagation, noise, reverberation, and sonar-performance models. This fourth edition of a bestseller discusses the fundamental processes involved in simulating the performance of underwater acoustic systems and emphasizes the importance of applying the proper modeling resources to simulate the behavior of sound in virtual ocean environments. New to the Fourth Edition Extensive new material that addresses recent advances in inverse techniques and marine-mammal protection Problem sets in each chapter Updated and expanded inventories of available models Designed for readers with an understanding of underwater acoustics but who are unfamiliar with the various aspects of modeling, the book includes sufficient mathematical derivations to demonstrate model formulations and provides guidelines for selecting and using the models. Examples of each type of model illustrate model formulations, model assumptions, and algorithm efficiency. Simulation case studies are also included to demonstrate practical applications. Providing a thorough source of information on modeling resources, this book examines the translation of our physical understanding of sound in the sea into mathematical models that simulate acoustic propagation, noise, and reverberation in the ocean. The text shows how these models are used to predict and diagnose the performance of complex sonar systems operating in the undersea environment.
Author: Ronald N. Kostoff Publisher: ISBN: 9781423502265 Category : Languages : en Pages : 361
Book Description
In FY 1990, Congress directed the Secretary of the Navy to commission a study by the National Academy of Sciences for the production of an integrated technology plan for the evolution of aircraft carriers in the first half of the twenty-first century. The House-Senate conferees emphasized "that the product of this study is to be a technology plan for the evolution of sea bases for the most efficient and economical accommodation of tactical air power in the first half of the twenty-first century". Based on this broad charter of evaluating sea bases, an examination of the floating ocean platform concept was included in the study. The floating ocean platform is a generic description of a large, relatively stationary or slowly mobile, platform that can be positioned in most areas of the ocean, and can serve a variety of purposes. The present report was the author's input to the study. It was based on technical analyses, literature reviews and surveys, and discussions/visits with the main groups and organizations involved in developing the floating ocean platform. All discussion material was unclassified, as are the contents of this report. All the external inputs and discussions, too numerous to mention, made this report possible, and are greatly appreciated. The first part of this report is the summary narrative that was submitted by the author to the Technology Group of the study. The second part is the viewgraphs that were presented to the Technology Group by the author on 12 February 1991. The third part is a selected bibliography of studies on the floating ocean platform over the past two decades, with over three thousand references identified.
Author: Ronald A. Wagstaff
Author: Ronald A. Wagstaff
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Author: Misac N. Nabighian
Author: Paul C. Etter
Author: Ronald N. Kostoff
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Author: Joseph Bishop Keller
Author: J. Michael McKisic