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This graduate textbook provides an introduction to quantum gravity, when spacetime is two-dimensional.

Ambjorn Jan: Elementary Introduction to
Quantum Geometry

Elementary Introduction to Quantum Geometry

1. Preliminary Material Part 1: the Path Integral. 2. The Free Relativistic particle. 3. One-Dimensional Quantum Gravity. 4. Branched Polymers. 5. Random Surfaces and Bosonic Strings. 6. Two-Dimensional Quantum Gravity. 7. The Fractal Structure of 2D Gravity. 8. The Causal Dynamical Triangulation model. Appendix A: Preliminary Material Part 2: Green Functions. Appendix B: Problem Sets 1-12. Appendix C: Solutions to Problem Sets 1-13.

Elastic wave propagation applies widely across engineering. This presents continuum mechanics, stress and strain tensors, and the derivation of equations for elastic wave motions with Green's function. The MUSIC algorithm is used to address inverse scattering problems, and the companion website provides software with detailed solutions.

Theory of Elastic Wave Propagation and its Application to Scattering Problems

De Gruyter Series in Nonlinear Analysis and Applications

Well-Posedness and Stabilizability

Distributional Nonlinear Wave Equations

Practical Sonochemistry: Applications of Power Ultrasound in Chemistry and Processing, Third Edition conveys the increasing growth in applications and equipment to power ultrasound. The book is written primarily for graduate students, postdoc researchers, and academics in applied chemistry and chemical engineering, as well as technicians and operators in relevant industry. Sonochemistry can do lots of amazing things in many different fields - but how and where do you start with applying it? This thoroughly updated edition offers a ground-up introduction to the fundamentals, applying power ultrasound to both lab and large-scale applications. The book answer questions such as does my laboratory have the equipment- what do I need? I have the equipment, but I have no idea how it works or how to use it- where do I start? I want to apply sonochemistry to a new reaction or processing method - what is the best approach? What types of sonochemistry equipment is available on the market and which is the best to choose? Can I scale up my reaction and if so, how do I do it, given that ultrasound is non-linear?

Applications of Power Ultrasound in Chemistry and Processing

Practical Sonochemistry

Inside Technology

The transformation of sound recording into a scientific technique in the study of birdsong, as biologists turned wildlife sounds into scientific objects. Scientific observation and representation tend to be seen as exclusively visual affairs. But scientists have often drawn on sensory experiences other than the visual. Since the end of the nineteenth century, biologists have used a variety of techniques to register wildlife sounds. In this book, Joeri Bruyninckx describes the evolution of sound recording into a scientific technique for studying the songs and calls of wild birds and asks, what it means to listen to animal voices as a scientist. The practice of recording birdsong took shape at the intersection of popular entertainment and field ornithology, turning recordings into objects of investigation and popular fascination. Shaped by the technologies and interests of amateur naturalism and music teaching, radio broadcasting and gramophone production, hobby electronics and communication engineering, birdsong recordings traveled back and forth between scientific and popular domains, to appear on gramophone recordings, radio broadcasts, and movie soundtracks. Bruyninckx follows four technologies--the musical score, the electric microphone, the portable magnetic tape recorder, and the sound spectrograph--through a cultural history of field recording and scientific listening. He chronicles a period when verbal descriptions, musical notations, and onomatopoeic syllables represented birdsong and shaped a community of listeners; later electric recordings struggled with notions of fidelity, realism, objectivity, and authenticity; scientists, early citizen scientists, and the recording industry negotiated recording exchange; and trained listeners complemented the visual authority of spectrographic laboratory analyses. This book reveals a scientific process fraught with conversions, between field and laboratory, sound and image, science and its various audiences.

Recording and the Science of Birdsong

Listening in the Field

"This captivating book brings together two birds of a feather: Jean and Johnny, boys from very different worlds growing up in a small village in France. Jean is the genteel pharmacist's son, dressed in his Sunday best; Johnny's father is a rough, working-class sheep herder, always with the odor of animals clinging to him. Each year, over three hundred bird species visit their village, which intersects a major migratory flyway. The two boys' stories converge when Jean enters a bird-calling contest. He places second, and at only eleven years old becomes a child celebrity on the bird-calling circuit. Then Johnny starts to compete as well. At the annual bird festival, both boys are standouts, and a long, admiring rivalry develops between them, eventually culminating in the European championships. As they evolve as performers, the two boys' identities become more distinct: Jean is soft-spoken, while Johnny likes to play to the crowd. While most of their competitors are adult men, hunters who learned to call birds for sport, the two boys are fascinated with the pure beauty of birdsong, and in trying to transcend themselves through imitating birds. Their shared passion develops into an enduring partnership as performers, and they go on to tour the world in concert as the Bird Singers. This is a story as much about friendship as it is about birdsong. The setting is timeless and bucolic, with long walks to small village schools, games of pick-up soccer, and father-son birding trips. The chapters, which bounce back and forth between the two narrators, are woven through with descriptions of colorful characters in the bird-calling competition circuit and the kind of ornithological detail that can only come from a true passion for birds. There is poetry in the description of the different birds, from common seagulls to thrushes and bluethroats and nightingales, and something like communion in the way Jean and Johnny understand the feathered friends they imitate. Unique, evocative, and cinematic, The Bird Singers is the story of an unlikely friendship, sparked by a desire to speak with the avian world."--

How Two Boys Discovered the Magic of Birdsong

The Bird Singers

Photonic Materials and Applications Series

Fiber-Optic Distributed Acoustic Sensing: Principles and Applications addresses the fundamentals of fiber optic distributed acoustic sensors (DAS) and their most important application fields. It is divided into three parts, the first of which covers the theoretical aspects of the working principle of DAS technology, including the description of the main optical components used for DAS monitoring, concepts of Rayleigh scattering, and approaches for resolving the spatial information based on optical time-domain and optical frequency-domain reflectometry. The second part focuses on the different interrogation techniques existing today, including dedicated signal processing and other advanced methods for enhancing sensing performance. The third part of the book is devoted to the main industrial applications of DAS technology, such as structural health monitoring, security, geophysical studies and seismic monitoring, including also relevant aspects related to the industrial standardization of the technology. For a reader with a basic background in photonics, the book provides the basis for knowing and understanding distributed acoustic sensing technology and its applications, in a single volume. It is relevant for a broad range of scientists and researchers working in the fields of photonics, sensing, environmental and structural health monitoring, optical communications, and optical fiber systems.

Principles and Applications

Fiber-Optic Distributed Acoustic Sensing

Manchester Physics Series

Accessible, student-friendly textbook on a core subject in undergraduate physics courses, updated with more worked examples, exercises, and everyday problems Emphasizing physical principles rather than mathematics, Vibrations and Waves, 2nd edition delivers a comprehensive and logical overview of the subject. Each topic begins with a discussion of the physical characteristics of the motion or system. The mathematics is kept as clear as possible and includes elegant mathematical descriptions where appropriate. This book features many worked examples, frequently drawn from everyday life (e.g., why microwave ovens typically have rotating turntables), along with more cutting-edge ones. Each chapter includes problems ranging in difficulty from simple to challenging and provides hints for solving problems. This new edition has been updated with even more worked examples, exercises, and relations to everyday problems. Vibrations and Waves discusses sample topics including: Simple harmonic motion, covering displacement, velocity, acceleration, and the physics of small vibrationsThe damped harmonic oscillator, covering light, leavy, and critical damping in its equation of motionTraveling waves, covering the transport of energy by a wave, waves at discontinuities, and waves in two and three dimensionsThe dispersion of waves, covering phase and group velocities and the superposition of waves in non-dispersive mediaInterference and diffraction of waves, covering Young's double-slit experiment and the Michelonson spectral interferometer Vibrations and Waves is an essential textbook for all readers learning about waves and vibrations for the first time, either on their own or through an undergraduate or advanced undergraduate course.

Vibrations and Waves

Emerging Materials and Technologies

Mechanics of Auxetic Materials and Structures offers a wide range of application-based and practical considerations of smart materials and auxetic materials in engineering structures. Covering analytical and numerical solution procedures, the book discusses crucial characteristics of metamaterials and their response to external factors.

Mechanics of Auxetic Materials and Structures

A captivating exploration of how underwater animals tap into sound to survive, and a clarion call for humans to address the ways we invade these critical soundscapes ¿ from an award-winning science writer.
For centuries humans ignored sound in the `silent world¿ of the ocean, assuming that what we couldn¿t perceive, didn¿t exist. But we couldn¿t have been more wrong. Marine scientists now have the technology to record and study the complex interplay of the myriad sounds in the sea. Finally, we can trace how sounds travel with the currents, bounce from the seafloor and surface, bend with temperature, and even saltiness; how sounds help marine life survive; and how human noise can transform entire marine ecosystems.
In Sing Like Fish, award-winning science journalist Amorina Kingdon synthesises historical discoveries with the latest research in a clear and compelling portrait of this sonic undersea world. From plainfin midshipman fish, whose swim-bladder drumming is so loud it keeps houseboat-dwellers awake, to the syntax of whalesong, from the deafening crackle of snapping shrimp, to underwater earthquakes and volcanoes, sound plays a vital role in feeding, mating, parenting, navigating, and warning. Meanwhile, our seas also echo with human-made sound, and we are only just learning how these pervasive noises can mask mating calls, chase animals from their food, and even wound creatures.
Intimate and artful, Sing Like Fish tells a uniquely complete story of ocean animals¿ submerged sounds, envisions a quieter future, and offers a profound new understanding of the world below the surface.

how sound rules life under water

Sing Like Fish

Dieses Buch bietet eine Zusammenfassung von physikalischen und elektronischen Zusammenhängen der Akustik. Zunächst behandelt es ausführlich die Grundlagen der Akustik. Auf dieser Basis beschreibt der Autor Mikrofone und Vorverstärker. Die Berechnung von aktiven und passiven Filterschaltungen sowie die Vorstellung der verschiedenen Betriebsarten von NF-Leistungsverstärkern vermitteln die notwendigen Kenntnisse der Elektronik. Darauf aufbauend folgen die Beschreibung und Berechnungen von aktiven und passiven Frequenzweichen. Die Beschreibung und Berechnungen von Lautsprecherkombinationen runden das inhaltliche Konzept des Buches ab und ermöglichen dem Leser somit die Einarbeitung in den ganzen Bereich der Elektroakustik.
 
 Der Inhalt
 
 Grundlagen der Akustik
 
 Phasenverzerrungen und Klangverfälschung
 
 Schallerzeugung und Messung
 
 Mikrofone
 
 Vorverstärker mit Transistoren
 
 FETs
 
 Operationsverstärker
 
 Aktive und passive Filterschaltungen
 
 NF-Leistungsverstärker
 
 Lautsprecher (Hoch-, Mittel-, und Tieftöner)
 
 Aktive und passive Frequenzweichen
 
 Lautsprecherkombinationen
 
 Die Zielgruppen
 
 Studenten aus der Elektrotechnik, Elektronik und Medizintechnik
 
 Techniker, Ingenieure und Meister aller Fachrichtungen
 
 Schüler an technischen und medizinischen Fachakademien
 
 Der Autor
 
 Dipl.-Ing. Herbert Bernstein lehrte an der Technikerschule München die Fächer Grundlagen der Elektrotechnik, Elektronik und Messtechnik. Er ist Autor zahlreicher Lehr- und Fachbücher auf dem Gebiet der Elektrotechnik, Elektronik und Messtechnik.

Mikrofone, Klangstufen, Verstärker, Filterschaltungen und Lautsprecher

Elektroakustik

"A well-written, keenly observed, theoretically rich, and historically unique account of life in Hanoi during the first year of the pandemic. It provides a significant expansion of our knowledge of the local-level workings of state power during the pandemic and a theoretically robust exploration of the acoustics of disaster governance."--Tine Mette Gammeltoft, author of Haunting Images: A Cultural Account of Selective Reproduction in Vietnam "This is a fascinating and ambitious text that brings together the experiences of COVID, still ongoing and not quite over, across multiple temporalities and localities. Sonic Socialism does tremendous work in being one of the first ethnographic accounts coming out of the COVID era."--Jennifer Hsieh, Assistant Professor of Anthropology, University of Michigan "Christina Schwenkel's turn toward 'sensory attunement' and sonic relations is breathtaking. She fled the US for lockdown in Hanoi and placed her trust in Vietnamese care campaigns. Her autoethnographic soundwalks through her neighborhood and into the nation opened my ears. And how she listens! Schwenkel is already the go-to scholar on postsocialist aesthetics, humanitarian practices, and infrastructural theory. Her deep knowledge of Vietnam comes together powerfully in this book as she takes a giant step into sound studies, offering new insights into Vietnam, the pandemic, and a noisy public sphere."--Deborah Wong, Professor Emerita of Music, University of California, Riverside

Crisis and Care in Pandemic Hanoi

Sonic Socialism

'A fascinating insight into the power of sound' Susan Cain, bestselling author of Quiet

How Sound Shapes Our Lives, Our Wellbeing and Our Planet

Sound Affects

Elementary Introduction to Quantum Geometry

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