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Author:
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 350
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Book Description
Author:
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 350
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Book Description
Author: A. J. Slobodnik (Jr.)
Publisher:
ISBN:
Category : Acoustic surface wave devices
Languages : en
Pages : 732
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Book Description
Information essential for the design of acoustic surface wave filters, signal processors, and other miniature, low cost, reliable devices for use in communications and electronic sensing is given in this report. Computations of surface wave velocity and electromechanical power flow angle, and estimates of surface wave coupling to interdigital transducers are given for various orientations of the following surface wave substrate materials: Ba2NaNb5O15, Bi12GeO20, CdS, Diamond, Eu3Fe5O15, Gadolinium Gallium Garnet, GaAs, Germanium, InSb, InAs, PbS, LiNbO3, MgO, Quartz, Rutile, Sapphire, Silicon, Spinel, TeO2, YAG, YGaG, YIG, and ZnO. Particular cuts of interest are then chosen for more detailed numerical calculations of mechanical and electrical parameters governing acoustic wave propagation in crystalline media. Similar data is given for common metals. A list of material constants and a bibliography of 520 surface wave papers are also included. (Author).
Author: John B. Bremner
Publisher: Columbia University Press
ISBN: 9780231044936
Category : Language Arts & Disciplines
Languages : en
Pages : 424
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Book Description
Surveying the expanding conflict in Europe during one of his famous fireside chats in 1940, President Franklin Roosevelt ominously warned that "we know of other methods, new methods of attack. The Trojan horse. The fifth column that betrays a nation unprepared for treachery. Spies, saboteurs, and traitors are the actors in this new strategy." Having identified a new type of war -- a shadow war -- being perpetrated by Hitler's Germany, FDR decided to fight fire with fire, authorizing the formation of the Office of Strategic Services (OSS) to organize and oversee covert operations. Based on an extensive analysis of OSS records, including the vast trove of records released by the CIA in the 1980s and '90s, as well as a new set of interviews with OSS veterans conducted by the author and a team of American scholars from 1995 to 1997, The Shadow War Against Hitler is the full story of America's far-flung secret intelligence apparatus during World War II. In addition to its responsibilities generating, processing, and interpreting intelligence information, the OSS orchestrated all manner of dark operations, including extending feelers to anti-Hitler elements, infiltrating spies and sabotage agents behind enemy lines, and implementing propaganda programs. Planned and directed from Washington, the anti-Hitler campaign was largely conducted in Europe, especially through the OSS's foreign outposts in Bern and London. A fascinating cast of characters made the OSS run: William J. Donovan, one of the most decorated individuals in the American military who became the driving force behind the OSS's genesis; Allen Dulles, the future CIA chief who ran the Bern office, which he called "the big window onto the fascist world"; a veritable pantheon of Ivy League academics who were recruited to work for the intelligence services; and, not least, Roosevelt himself. A major contribution of the book is the story of how FDR employed Hitler's former propaganda chief, Ernst "Putzi" Hanfstengl, as a private spy. More than a record of dramatic incidents and daring personalities, this book adds significantly to our understanding of how the United States fought World War II. It demonstrates that the extent, and limitations, of secret intelligence information shaped not only the conduct of the war but also the face of the world that emerged from the shadows.
Author: Andrew James Slobodnik (Jr.)
Publisher:
ISBN:
Category : Microwaves
Languages : en
Pages : 376
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Book Description
Author: American National Standards Institute
Publisher:
ISBN:
Category : Sound
Languages : en
Pages : 58
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Book Description
Author: Michael L. Banner
Publisher: Springer Science & Business Media
ISBN: 3642848478
Category : Science
Languages : en
Pages : 375
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Book Description
Wave breaking is a commonly occurring phenomena associated with wave motion in fluids, often inducing significant effects which are of fundamental and technological importance, A familiar illustration is provided with white-capping and microbreaking of the wind-driven ocean sUrface waves, which is believed to play an important part in the transfers of momentum, mass and heat across the air-sea interface, as well as in the production of underwater ambient noise and augmented microwave backscatter. The enhanced hydrodynamic forces associated with the breaking of the more energetic ocean wave components constitute a significant challenge in ocean engineering, coastal engineering and naval architecture. Other less conspicuous but equally important manifestations are the breaking of internal waves and the fila mentation of vorticity interfaces. Despite recent theoretical and observational progress towards a more complete understanding of wave breaking, mathematical descriptions of its onset and consequences are presently lacking. The aim of this Symposium was to bring together theoretical and observational expertise, with the goal of determining the current state of knowledge of wave breaking and providing a stimulus to future research. The Symposium focused on water waves of all scales from capillary waves to ocean swell, but also considered internal waves and the filamentation of vorticity interfaces. Specific topics included were: Fundamental theoretical studies; wave instabilities; routes to breaking. Models of wave breaking. Field observations, including statistical information. Laboratory studies. Shoaling waves, breaking waves on currents, breaking induced by the motion of a ship.
Author: John Broadhouse
Publisher:
ISBN:
Category : Music
Languages : en
Pages : 456
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Book Description
Author: Frank Fahy
Publisher: CRC Press
ISBN: 1135822026
Category : Technology & Engineering
Languages : en
Pages : 328
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Book Description
The advent of instruments capable of measuring sound intensity, which represents the flow of energy in sound fields, has revolutionised audio-frequency acoustical metrology. Since publication of the first edition, two International Standards for the use of sound intensity for sound source power determination, and one International Standard for sound intensity instrumentation, have also been published. A number of International Standards have also been developed.
Author: Sourav Banerjee
Publisher: CRC Press
ISBN: 1000936554
Category : Technology & Engineering
Languages : en
Pages : 460
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Book Description
As an equivalent counterpart of topological research on photonics and condensed matter physics, acoustic metamaterials create an opportunity to explore the topological behaviors in phononics and physics of programmable acoustics. This book introduces the topological behavior of acoustics through the novel design of metamaterials. It provides valuable insight into acoustic metamaterials, from multidisciplinary fundamentals to cutting-edge research. Serves as a single resource on acoustic metamaterials Covers the fundamentals of classical mechanics, quantum mechanics, and state-of-the-art condensed matter physics principles so that topological acoustics can be easily understood by engineers Introduces topological behaviors with acoustics and elastic waves through quantum analogue Hall effects, quantum spin Hall effects, and quantum valley Hall effects and their applications Explains the pros and cons of different design methods and gives guidelines for selecting specific designs of acoustic metamaterials with specific topological behaviors Includes MATLAB® code for numerical analysis of band structures This book is written for graduate students, researchers, scientists, and professionals across materials, mechanical, civil, and aerospace engineering, and those who want to enhance their understanding and commence research in metamaterials.
Author: Sarah A. Fagents
Publisher: Cambridge University Press
ISBN: 052189543X
Category : Nature
Languages : en
Pages : 433
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Book Description
An advanced textbook and reference resource examining the physics of volcanic behavior and the state of the art in modeling volcanic processes.
