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Study and Design of Differential Microphone Arrays

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Jacob Benesty, Jingdong Chen, "Study and Design of Differential Microphone Arrays"
English | 2013 | ISBN-10: 364233752X, 3642427561 | 180 pages | PDF | 6 MB

Study and Design of Differential Microphone Arrays
Microphone arrays have attracted a lot of interest over the last few decades since they have the potential to solve many important problems such as noise reduction/speech enhancement, source separation, dereverberation, spatial sound recording, and source localization/tracking, to name a few. However, the design and implementation of microphone arrays with beamforming algorithms is not a trivial task when it comes to processing broadband signals such as speech. Indeed, in most sensor arrangements, the beamformer output tends to have a frequency-dependent response. One exception, perhaps, is the family of differential microphone arrays (DMAs) who have the promise to form frequency-independent responses. Moreover, they have the potential to attain high directional gains with small and compact apertures. As a result, this type of microphone arrays has drawn much research and development attention recently. This book is intended to provide a systematic study of DMAs from a signal processing perspective. The primary objective is to develop a rigorous but yet simple theory

for the design, implementation, and performance analysis of DMAs. The theory includes some signal processing techniques for the design of commonly used first-order, second-order, third-order, and also the general Nth-order DMAs. For each order, particular examples are given on how to form standard directional patterns such as the dipole, cardioid, supercardioid, hypercardioid, subcardioid, and quadrupole. The study demonstrates the performance of the different order DMAs in terms of beampattern, directivity factor, white noise gain, and gain for point sources. The inherent relationship between differential processing and adaptive beamforming is discussed, which provides a better understanding of DMAs and why they can achieve high directional gain. Finally, we show how to design DMAs that can be robust against white noise amplification.
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Risk and Social Theory in Environmental Management

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Risk and Social Theory in Environmental Management by Thomas Measham, Stewart Lockie
2012 | ISBN: 0643104127 | English | 232 pages | PDF | 12 MB

Risk and Social Theory in Environmental Management
marks a timely contribution, given that environmental management is no longer just about protecting pristine ecosystems and endangered species from anthropogenic harm; it is about calculating and managing the risks to human communities of rapid environmental and technological change.

First, the book provides a solid foundation of the social theory underpinning the nature of risk, then presents a rethinking of key concepts and methods in order to take more seriously the biophysical embeddedness of human society. Second, it presents a rich set of case studies from Australia and around the world, drawing on the latest applied research conducted by leading research institutions. In so doing, the book identifies the tensions that arise from decision making over risk and uncertainty in a contested policy environment, and provides crucial insights for addressing on-the-ground problems in an integrated way.

* First volume to address environmental risk from a social science perspective
* Latest theoretical developments
* In depth case studies of contemporary issues (e.g. climate change, water shortages)
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Polyphosphazenes for Medical Applications

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Polyphosphazenes for Medical Applications By Ian Teasdale, Oliver Brüggemann
2014 | 214 Pages | ISBN: 1909030880 | PDF | 19 MB

Polyphosphazenes for Medical Applications
Polyphosphazenes are a unique family of inorganic polymers with an unparalleled broad spectrum of properties. Furthermore, these properties can be easily fine-tuned by organic side-group substituents to give poly(organo)phosphazenes with precisely desired characteristics making them valuable tools to prepare multifunctional, advanced materials for biomedical applications. Bioerodible poly(organo)phosphazenes are of particular interest and with suitable organic substituents their rate of degradation can be tailored to give materials ranging from highly biostable to rapidly hydrolysable, with proven biocompatibility and nontoxic products. This volume provides an overview of the current state of development of poly(organo)phosphazenes designed specifically for use in medical applications. The objective is firstly to provide detailed information on the latest preparation techniques to synthesise well-defined, customised materials for the desired application. Secondly, a detailed review of the most recent data for application studies in medicine is provided, with particular focus given to their applications as macromolecular carriers in nanomedicine, including drug delivery, immunology and gene therapy, as well as their use as degradable scaffolds for tissue regeneration. This book should not only provide a valuable and critical summary for researchers already working in, or looking to enter the field, but also those contemplating the use of polyphosphazenes for their desired application.
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Physical Approaches to Biological Evolution

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Mikhail V. Volkenstein, "Physical Approaches to Biological Evolution"
1994 | pages: 402 | ISBN: 3642787908 | DJVU | 4,5 mb

Physical Approaches to Biological Evolution
"Mr. Wolkenstein's , whether or not it proves to give the ultimate truth on the matters with which it deals, certainly deserves, by its breadth and scope and profundity, to be considered an impor­ tant event in the philosophical world." This is a quotation from an introduction written by Bertrand Russell for Ludwig Wittgenstein's Tractatus Logico-Philosophicus. I exchanged only name and subject. As for the rest, I could continue quoting Russell, but I would rather say something myself. As Wittgenstein did with formal logic, Wolkenstein rectifies our views on how to approach the logic of life from a formal theoretical basis. Many bio­ logists do not believe that their subject lends itself to the scrutiny of physical theory. They certainly admit that one can simulate biological phenomena by models that can be expressed in a mathematical form. However, they do not believe that biology can be given a theoretical foundation that is defined within the general framework of physics. Rather, they insist on a holistic approach, banning any reduction to fundamental principles subject to physical theory.
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Physical Approaches to Biological Evolution

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Mikhail V. Volkenstein, "Physical Approaches to Biological Evolution"
1994 | pages: 402 | ISBN: 3642787908 | DJVU | 4,5 mb

Physical Approaches to Biological Evolution
"Mr. Wolkenstein's , whether or not it proves to give the ultimate truth on the matters with which it deals, certainly deserves, by its breadth and scope and profundity, to be considered an impor­ tant event in the philosophical world." This is a quotation from an introduction written by Bertrand Russell for Ludwig Wittgenstein's Tractatus Logico-Philosophicus. I exchanged only name and subject. As for the rest, I could continue quoting Russell, but I would rather say something myself. As Wittgenstein did with formal logic, Wolkenstein rectifies our views on how to approach the logic of life from a formal theoretical basis. Many bio­ logists do not believe that their subject lends itself to the scrutiny of physical theory. They certainly admit that one can simulate biological phenomena by models that can be expressed in a mathematical form. However, they do not believe that biology can be given a theoretical foundation that is defined within the general framework of physics. Rather, they insist on a holistic approach, banning any reduction to fundamental principles subject to physical theory.
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Handbook of Polymers in Stone Conservation

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Handbook of Polymers in Stone Conservation By Elisabetta Princi
2014 | 316 Pages | ISBN: 1847357032 , 1847357121 | PDF | 10 MB

Handbook of Polymers in Stone Conservation
Dr. Elisabetta Princi has wide experience regarding the use of polymers in the field of cultural heritage. She has led a research team at the University of Genoa (Genoa, Italy) for several years and has published widely on the scientific background to the conservation, preservation and restoration of stone and stone-based works of art. This handbook is dedicated to the conservation of stone materials by the application of polymers. A short introduction on polymer chemistry is given to highlight their characteristics and properties. After the physical and chemical attributes of stone are summarised, the problems related to its degradation are discussed. Finally, the properties of the various polymers of potential value for stone restoration are reviewed and classified by schemes and tables, and pointers for the future are suggested. This handbook will be of great interest to those who share the author's enthusiasm for stone artworks and her dedication to their restoration and conservation.
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The Agamben Dictionary

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The Agamben Dictionary by Alex Murray and Jessica Whyte
English | 2011-08-30 | ISBN: 0748640592, 0748640584 | PDF | 256 pages | 0,8 MB

The Agamben Dictionary
Agamben's vocabulary is both expansive and idiosyncratic, with words such as "infancy", "gesture" and "profanation" given specific and complex meanings that can bewilder the new reader. Bringing together leading scholars in the field, including Thanos Zartaloudis (Birkbeck, University of London), Kevin Attell (Cornell University) and Catherine Mills (The University of Sydney) the 150 entries explain the key concepts in Agamben's work and his relationship with other thinkers, from Aristotle to Aby Warburg.
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Magnetic Hysteresis

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Magnetic Hysteresis by Edward Della Torre
English | 1999 | ISBN: 0780360419 | 232 Pages | PDF | 10 MB
Electrical Engineering Magnetic Hysteresis Understanding magnetic hysteresis is vitally important to the development of the science of magnetism as a whole and to the advancement of practical magnetic device applications.

Magnetic Hysteresis
, by acclaimed expert Edward Della Torre, presents a clear explanation of the connection between physical principles and phenomenological hysteresis. This comprehensive book offers a lucid analysis that enables the reader to save valuable time by reducing trial-and-error design. Dr. Della Torre uses physical principles to modify Preisach modeling and to describe the complex behavior of magnetic media. While Pretsach modeling is a useful mathematical tool, its congruency and deletion properties present limitations to accurate descriptions of magnetic materials. Step-by-step, this book describes the modifications that can overcome these limitations. Special attention is given to the use of feedback around a Preisach transducer to remove the congruency restriction, and to the use of accommodation and aftereffect models to remove the deletion restriction. Magnetic state selection rules are introduced to couple scalar Preisach models to form a vector model. is indispensable reading for engineers, physicists, and materials scientists who want to gain a better understanding of hysteresis losses and create more energy-efficient motor designs.
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Must You Go? My Life with Harold Pinter

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Must You Go? My Life with Harold Pinter By Antonia Fraser
Publisher: Na.n A. Ta.le.se 2010 | 336 Pages | ISBN: 0385532504 | EPUB | 12 MB

Must You Go? My Life with Harold Pinter
Fraser is a highly regarded British biographer, and the late Harold Pinter, her husband, was a Nobel-winning British playwright. So, the circle they generally traveled in was made up of not only fellow writers but also, because of their individual and combined celebrity, fellow celebrities. Fraser's latest book is both joyous and sad. The former because she shares diary entries concerning her relationship with Pinter (they lived together from August 1975 until Christmas 2008), and it was obviously a stimulating love-match. And sad because the book ends when it does because of Pinter's death from cancer; his struggle with the disease had been years-long. As expected, given their fame and the fame of their associates, lots of name-dropping goes on here. This is not, of course, the story of two starving artists trying to scratch together a living in some cold-water flat. But privileged as they were, they nevertheless experienced the normal highs and lows together, and the result is a poignant read. Serious readers will generate demand for this title, and they will respond with gratitude to Fraser's intimacy.
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