1.

Record Nr.

UNINA9910908373403321

Autore

Craster Richard

Titolo

Acoustic Metamaterials : Absorption, Cloaking, Imaging, Time-Modulated Media, and Topological Crystals / / edited by Richard Craster, Sébastien Guenneau

Pubbl/distr/stampa

Cham : , : Springer Nature Switzerland : , : Imprint : Springer, , 2024

ISBN

9783031600159

9783031600142

Edizione

[2nd ed. 2024.]

Descrizione fisica

1 online resource (0 pages)

Collana

Springer Series in Materials Science, , 2196-2812 ; ; 345

Altri autori (Persone)

GuenneauSébastien

Disciplina

534

Soggetti

Acoustics

Acoustical engineering

Ceramic materials

Mechanics

Engineering Acoustics

Ceramics

Classical Mechanics

Lingua di pubblicazione

Inglese

Formato

Materiale a stampa

Livello bibliografico

Monografia

Nota di contenuto

1 Fundamentals of Acoustic Metamaterials -- 2 Locally Resonant Structures for Low Frequency Surface Acoustic Band Gap Applications -- 3 Band-Gap Properties of Prestressed Structures -- 4 Ultrasound Transmission Through Periodically Perforated Plates -- 5 Novel Ultrasound Imaging Applications -- 6 Subwavelength Focussing in Metamaterials Using Far Field Time Reversal -- 7 Anisotropic Metamaterials for Transformation Acoustics and Imaging -- 8 Transformation Acoustics -- 9 Acoustic Cloaking via Homogenization -- 10 Acoustic Cloaking with Plasmonic Shells -- 11 Cloaking Liquid Surface Waves and Plasmon Polaritons -- 12 Transformation Elastodynamics and Active Exterior Acoustic Cloaking -- 13 Experimental Acoustics and Metasurfaces -- 14 Resonators atop Surfaces -- 15 Elastic Metamaterials.

Sommario/riassunto

The revised edition of this book offers an expanded review of acoustic metamaterials; novel materials which can manipulate sound waves,



surface Rayleigh waves and water waves, in surprising ways, which include collimation, focusing, negative refraction, passive and active cloaking, sonic screening and extraordinary transmission. It covers both experimental and theoretical aspects of acoustic and elastic waves propagating in structured composites, with a focus on effective properties associated with negative refraction, lensing and cloaking. Updated chapters cover filtering effects, extraordinary transmission, sub-wavelength imaging via tomography or time-reversal techniques, cloaking via transformation acoustics, elastodynamics, and acoustic scattering cancellation. For this revised edition, six new chapters have been introduced to reflect recent developments in experimental acoustics and metasurfaces including acoustic impedance gratings and mirror symmetric metamaterials, phononic subsurfaces, time-modulated and topological crystals. The latter two are illustrated by simple Python program examples. The broad scope gives the reader an overview of the state of the art in acoustic metamaterials research and an indication of future directions and applications. It will serve as a solid introduction to the field for advanced students and researchers in physics, applied mathematics and mechanical engineering, and a valuable reference for those working in metamaterials and related areas.and researchers in physics, applied mathematics and mechanical engineering, and a valuable reference for those working in metamaterials and related areas.



2.

Record Nr.

UNINA9910971071203321

Autore

Bowler Shaun <1958->

Titolo

Demanding choices : opinion, voting, and direct democracy / / Shaun Bowler and Todd Donovan

Pubbl/distr/stampa

Ann Arbor, : University of Michigan Press, 2000, c1998

ISBN

1-282-76101-3

9786612761010

9780472087150

0472087150

0-472-02334-9

Edizione

[1st pbk. ed.]

Descrizione fisica

xiv, 198 p. ; ; 24 cm

Altri autori (Persone)

DonovanTodd

Disciplina

321.8

Soggetti

Democracy

Elections

Referendum

Representative government and representation

Lingua di pubblicazione

Inglese

Formato

Materiale a stampa

Livello bibliografico

Monografia

Note generali

Description based upon print version of record.

Nota di bibliografia

Includes bibliographical references and index.

Nota di contenuto

""Contents""; ""List of Figures""; ""List of Tables""; ""Preface""; ""1. The History of Direct Democracy: A Critique of Voter Competence""; ""2. Reasoning Voters: Sorting through the Demands of Direct Democracy""; ""3. Responding to Demands: Information, Abstention, and Just Saying ""No""""; ""4. Economic Conditions and Voting on Ballot Propositions""; ""5. Private Interests and Instrumental Voting""; ""6. Voter Response to the Initiative Logroll and the Counterproposition""; ""7. Partisan Interests and Campaign Information: Support for Term Limits""

""8. How Campaign Spending Affects Voter Awareness and Opinions of Initiatives""""9. Conclusions about Voter Reasoning in Direct Democracy""; ""Appendix A: Coding of Variables on Private Interests and Voting Behavior""; ""References""; ""Index""