Download or read book Temporal Attributes of the Ambient Seismo acoustic Environment written by James C. Battis and published by . This book was released on 1989 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Research Papers written by and published by . This book was released on with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Seismic acoustic Study of Low Altitude Air Blasts at Ft Devens Massachusetts written by Janet C. Johnston and published by . This book was released on 1990 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: On 5 May 1986, 3 packages of TNT were detonated 100 ft in the air above the Turner Drop Zone at Ft. Devens, Massachusetts. The aerial explosions were recorded by seismic and acoustic sensors over 2 linear arrays that covered the distance range from 0 to 1000 meters. One array was installed over flat topography, while the other was installed across a hill with 80 ft of relief. The goal of the experiment was to examine the response of the ground and the air to a unit impulse. Although recording of the higher frequencies generated by the blasts was limited by the sampling rate capability of the equipment (100 and 200 samples/sec) it was clear that the hill produced a sheltering effect. Considerable transverse motion appeared in the records. Reduced time plots revealed a propagation speed of 0.35 km/sec corresponding primarily to an airwave induced seismic signal, although some seismic precursors are evident. The ratio of peak seismic velocity to pressure ranged from 10-4 cm/sec/Pa for the line that transversed the hill to .00001 cm/sec/Pa for the flat array. The experiment should be repeated in the same area during different seasonal coverings (snow and ice) and extended to areas with more complex topography and different vegetation. In future experiments the position of the air blasts should be varied to facilitate discrimination of paths to the receivers. The results could be extrapolated to an extended, continuous source such as a low flying aircraft or cruise missile.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1992 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Ambient Noise written by Nori Nakata and published by Cambridge University Press. This book was released on 2019-03-21 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview of seismic ambient noise, covering observations, physical origins, modelling, processing methods and applications in imaging and monitoring.
Download or read book Oceanobs 19 An Ocean of Opportunity Volume I written by Tong Lee and published by Frontiers Media SA. This book was released on 2020-12-31 with total page 783 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Download or read book Aural Experience and Soundscape Management written by Diana Grgurić and published by CRC Press. This book was released on 2024-03-19 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since technological progress is characterized by the dual effects, positive and negative, it is precisely by sustaining the balance between such binaries that ecologically responsible resource management is restored as a solution for excessive human impact on the environment. Sound and music became relevant from the perspective of management, within the meaning of controlling their negative effects on human beings and their environment as well as utilizing them for meeting human needs. This book integrates the fields of technology, humanities, and social sciences and defines the challenges of noise control from the perspective of acoustic ecology. It discusses the concept of acoustic ecology applied to evoke sound and music management and design solutions for well-being. It will be equally useful for students of electrical engineering, music, and economics; equally challenging to those with a particular prior knowledge and practice; and as much as comprehensive and stimulative for those who are barely embarking upon a new adventure.
Download or read book A History of the Acoustics Division of the Naval Research Laboratory written by Fred Tudor Erskine and published by . This book was released on 2013 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1993 with total page 1800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Governance of Arctic Shipping written by Aldo Chircop and published by Springer Nature. This book was released on 2020-08-11 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book is a result of the Dalhousie-led research project Safe Navigation and Environment Protection, supported by a grant from the Ocean Frontier Institute’s the Canada First Research Excellent Fund (CFREF). The book focuses on Arctic shipping and investigates how ocean change and anthropogenic impacts affect our understanding of risk, policy, management and regulation for safe navigation, environment protection, conflict management between ocean uses, and protection of Indigenous peoples’ interests. A rapidly changing Arctic as a result of climate change and ice loss is rendering the North more accessible, providing new opportunities while producing impacts on the Arctic. The book explores ideas for enhanced governance of Arctic shipping through risk-based planning, marine spatial planning and scaling up shipping standards for safety, environment protection and public health.
Download or read book Management Plan for Ocean Environmental Acoustics Programs in Support of Mobile Sonar Technology Development written by Carey D. Smith and published by . This book was released on 1975 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of the U.S. Navy as a credible world sea power is placing increasing demands on sonar systems development for ASW. The management of the Navy's Ocean Environmental Acoustic Program (EVA) is of great concern because of the critical nature of this support service to systems development. At present, sonar developers and operators do not have sufficient EVA data and models available for optimum systems design and use. The deficiency is primarily due to a technological gap between EVA program outputs and the system developers requirements. The most effective and efficient management and implementation of the EVA program is therefore required. A detailed plan for a program management structure in NAVSEA (Sonar Technology Division) is presented; it calls for the establishment of a technical group assigned the responsibility for developing and maintaining a working relationship between environmental acousticians and systems developers.
Download or read book Seismic Surface Waves in a Laterally Inhomogeneous Earth written by V.I. Keilis-Borok and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface waves form the longest and strongest portion of a seismic record excited by explosions and shallow earthquakes. Traversing areas with diverse geologic structures, they 'absorb' information on the properties of these areas which is best retlected in dispersion, the dependence of velocity on frequency. The other prop erties of these waves - polarization, frequency content, attenuation, azimuthal variation of the amplitude and phase - arc also controlled by the medium between the source and the recording station; some of these are affected by the properties of the source itself and by the conditions around it. In recent years surface wave seismology has become an indispensable part of seismological practice. The maximum amplitude in the surface wave train of virtually every earthquake or major explosion is being measured and used by all national and international seismological surveys in the determination of the most important energy parameter of a seismic source, namely, the magnitude M,. The relationship between M, and the body wave magnitude fI1t, is routinely employed in identification of underground nuclear explosions. Surface waves of hundreds of earthquakes recorded every year are being analysed to estimate the seismic moment tensor of earthquake sources, to determine the periods of free oscillations of the Earth, to construct regional dispersion curves from which in turn the crustal and upper mantle structure in various areas is derived, and to evaluate the dissipative parameters of the mantle material.
Download or read book Ocean Noise and Marine Mammals written by National Research Council and published by National Academies Press. This book was released on 2003-05-22 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the 119 species of marine mammals, as well as for some other aquatic animals, sound is the primary means of learning about the environment and of communicating, navigating, and foraging. The possibility that human-generated noise could harm marine mammals or significantly interfere with their normal activities is an issue of increasing concern. Noise and its potential impacts have been regulated since the passage of the Marine Mammal Protection Act of 1972. Public awareness of the issue escalated in 1990s when researchers began using high-intensity sound to measure ocean climate changes. More recently, the stranding of beaked whales in proximity to Navy sonar use has again put the issue in the spotlight. Ocean Noise and Marine Mammals reviews sources of noise in the ocean environment, what is known of the responses of marine mammals to acoustic disturbance, and what models exist for describing ocean noise and marine mammal responses. Recommendations are made for future data gathering efforts, studies of marine mammal behavior and physiology, and modeling efforts necessary to determine what the long- and short-term impacts of ocean noise on marine mammals.
Download or read book Towards Improved Forecasting of Volcanic Eruptions written by Corentin Caudron and published by Frontiers Media SA. This book was released on 2020-04-01 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Microtremor Survey Method written by Hiroshi Okada and published by SEG Books. This book was released on 2003 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the nature of the microtremor noise field, the use of appropriate surface arrays of geophones, and the two principal classes of array-processing techniques, high-resolution beamforming and the spatial autocorrelation method (SPAC). This is the first comprehensive textbook of the microtremor survey method written in English.
Download or read book Handbook on Marine Environment Protection written by Markus Salomon and published by Springer. This book was released on 2018-01-31 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is the first of its kind to provide a clear, accessible, and comprehensive introduction to the most important scientific and management topics in marine environmental protection. Leading experts discuss the latest perspectives and best practices in the field with a particular focus on the functioning of marine ecosystems, natural processes, and anthropogenic pressures. The book familiarizes readers with the intricacies and challenges of managing coasts and oceans more sustainably, and guides them through the maze of concepts and strategies, laws and policies, and the various actors that define our ability to manage marine activities. Providing valuable thematic insights into marine management to inspire thoughtful application and further study, it is essential reading for marine environmental scientists, policy-makers, lawyers, practitioners and anyone interested in the field.
