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Tesi sul tema "Sound-waves"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Zinoviev, Alexei. "Application of the Multi-Modal Integral Method (MMIM) to sound wave scattering in an acoustic waveguide." Title page, contents and abstract only, 1999. http://hdl.handle.net/2440/37720.

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The current work is devoted to the problem of sound wave scattering by elastic cylindrical objects in a plain acoustic waveguide. The Multi- Modal Integral Method (MMIM) is proposed, which is based on nonstandard representation of the Green's function. It combines advantages of integral equation and eigenfunction methods and provides a quickly converging and highly accurate solution, taking into account all the waveguide modes up to infinite order. As illustrations of application of this method, acoustic diffraction is calculated from a system of several parallel homogeneous cylinders and from

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2

Chambers, James P. "Scale model experiments on the diffraction and scattering of sound by geometrical step discontinuities and curved rough surfaces." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/17858.

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3

Yargus, Michael W. "Experimental study of sound waves in sandy sediment /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/6075.

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4

Menchon, Enrich Ricard. "Spatial adiabatic passage: light, sound and matter waves." Doctoral thesis, Universitat Autònoma de Barcelona, 2013. http://hdl.handle.net/10803/129476.

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El naixement de la Mecànica Quàntica va proporcionar el marc teòric que permetia poder explicar fenòmens prèviament observats experimentalment, com ara la radiació del cos negre, l'efecte fotoelèctric o les línies espectrals de gasos atòmics, i també va permetre entendre millor aspectes fonamentals relacionats amb la dualitat ona-partícula i la interacció entre radiació i matèria. La Mecànica Quàntica ha estat també l'origen de disciplines més específiques com l'Òptica Quàntica o la Informació Quàntica, les quals s’ocupen parcialment del que es coneix com Enginyeria Quàntica. En aquest con

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5

Legendre, César. "On the interactions of sound waves and vortices." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209147.

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The effects of vortices on the propagation of acoustic waves are numerous, from simple convection effects to instabilities in the acoustic phenomena, including absorption,<p>reflection and refraction effects. This work focusses on the effects of mean flow<p>vorticity on the acoustic propagation. First, a theoretical background is presented<p>in chapters 2-5. This part contains: (i) the fluid dynamics and thermodynamics<p>relations; (ii) theories of sound generation by turbulent flows; and (iii) operators taken<p>from scientific literature to take into account the vorticity effects on acoustics

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6

Zinoviev, Alexei lurjevich. "Application of the Multi-Modal Integral Method (MMIM) to sound wave scattering in an acoustic waveguide." Click here to access, 1999. http://thesis.library.adelaide.edu.au/public/adt-SUA20050905.140025.

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Thesis (Ph.D.)--University of Adelaide, Dept. of Mechanical Engineering, 2000.<br>Title from screen page (viewed September 13 2005). Includes bibliographical references. Also available in print version.

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7

Wang, Qiang. "Atmospheric refraction and propagation over curved surfaces." n.p, 1997. http://ethos.bl.uk/.

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8

Dostal, Jack Alan. "An investigation into student understanding of longitudinal standing waves." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/dostal/DostalJ1208.pdf.

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This study investigates the difficulties that introductory university physics students have with the concept of longitudinal standing waves in the context of standing waves in pipes. My goal is to identify difficulties that persist even after standard instruction on longitudinal standing waves and attempt to improve upon that method of instruction. The study follows a four-step design. I first use exploratory surveys and interviews with students to elicit the difficulties present in students\' understanding of longitudinal standing waves in pipes. I then use the information gained to create an

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9

Cornell, Jason E. "Verification of the single scattering analytical model for mode coupling effects caused by solitons." Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Sep/09Sep_Cornell.pdf.

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Thesis (M.S. in Applied Physics)--Naval Postgraduate School, September 2009.<br>Thesis Advisor(s): Colosi, John A. ; Smith, Kevin B. "September 2009." Description based on title screen as viewed on November 5, 2009. Author(s) subject terms: Shallow-water environment, 3-D simulations, vertical mode coupling, Internal Solitary Waves, solitons, acoustic variability. Includes bibliographical references (p. 55). Also available in print.

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10

Ailes-Sengers, Lynn H. "Pulse broadening, polarimetric and angular memory effects of wave scattering from very rough surfaces /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/5856.

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11

Wang, Shuai School of Electrical Engineering &amp Telecommunication UNSW. "Soundfield analysis and synthesis: recording, reproduction and compression." Awarded by:University of New South Wales. School of Electrical Engineering and Telecommunication, 2007. http://handle.unsw.edu.au/1959.4/31502.

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Globally, the ever increasing consumer interest in multichannel audio is a major factor driving the research intent in soundfield reconstruction and compression. The popularity of the well commercialized 5.1 surround sound system and its 6-Channel audio has been strongly supported by the advent of powerful storage medium, DVD, as well as the use of efficient telecommunication techniques. However, this popularity has also revealed potential problems in the development of soundfield systems. Firstly, currently available soundfield systems have rather poor compatibility with irregular speaker arr

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12

Bell, Alexander J. "An acoustical investigation of the concert harp." Thesis, University of St Andrews, 1988. http://hdl.handle.net/10023/2768.

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This thesis is a report of acoustical research on the concert harp. The harp has an established place in the symphony orchestra and is reacquiring its role as a solo chamber instrument that it had before the development of the modern piano. As far as can be determined, this is the first doctoral thesis on the concert harp and serves as an introduction to the science of the instrument, The experimental methods employed- holographic interferonietry, input admittance measurements, Chiadni glitter pattern methods, sound pressure level measurements- have all been successfully used with work on othe

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13

Terrill, Eric J. "Acoustic measurements of air entrainment by breaking waves /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p9907829.

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14

Soukup, Darin J. "A coupled local mode approach to laterally heterogeneous anisotropic media, volume scattering, and T-wave excitation /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/6847.

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15

Popple, Damian Francis. "The interaction of two-dimensional sound waves with several compliant strips." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243562.

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16

Abbott, James Fuller. "The interaction of sound and shock waves with flexible porous materials." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13858.

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17

Lu, Paul ChihPeng. "Passive cancellation of low frequency sound waves using optimized embedded mechanisms." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1876285421&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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18

Maddi, Anis. "Nonreciprocal control of sound waves using thermoacoustic and active electroacoustic elements." Electronic Thesis or Diss., Le Mans, 2025. http://www.theses.fr/2025LEMA1003.

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Ce travail est consacré à la conception de systèmes acoustique non-réciproques, en faisant usage soit de l'effet thermoacoustique, soit d’éléments actifs munis d’une boucle de rétroaction électroacoustique asymétrique. Ces deux méthodes permettent de briser la réciprocité des ondes sonores aériennes en basse fréquence et sur une large bande, tout en préservant la linéarité du système considéré. Les deux méthodes étant basées sur un apport d’énergie externe (travail ou chaleur), elles ont également la propriété intéressante d’introduire du gain ou de la perte dans le système.L'effet thermoacous

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19

Hacene-Djaballah, Nouri. "Floating floor attenuation of impact structure-borne sound in timber construction." Fairfax, VA : George Mason University, 2009. http://hdl.handle.net/1920/4598.

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Thesis (M.S.)--George Mason University, 2009.<br>Vita: p. 42. Thesis director: Girum Urgessa. Submitted in partial fulfillment of the requirements for the degree of Master of Science in Civil, Environmental, and Infrastructure Engineering. Title from PDF t.p. (viewed Oct. 12, 2009). Includes bibliographical references (p. 39-41). Also issued in print.

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20

Bowen, Stephen Gerard. "Forward scattering of a pulsed continuous wave signal through laminar and turbulent thermal plumes." Thesis, Springfield, Va. : Available from the National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA271210.

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Thesis (Degree of Ocean Engineer)-- Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution, Sept. 1993.<br>Thesis advisor(s): Catipovic, Josko. September 1993. Bibliography: p. 72-74. Also available online.

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21

Burger, Gert Cloete. "Optimisation of the pulse-echo method with an application to acoustic thermometry." Thesis, Cape Peninsula University of Technology, 2010. http://hdl.handle.net/20.500.11838/1105.

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Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2009<br>In acoustics, pulse echo methods are well known as a means of measuring time of Hight. Traditional techniques for generating acoustic waves in solid ferromagnetic waveguides include piezoelectric, capacitive and magnetostriction. Piezoelectric and capacitive techniques are preferred due to the inefficiency of magnetostriction caused by electro-mechanical coupling losses and the fact that most ferromagnetic materials show low levels of magnetostriction. The aim of this study was to optimise the magnet

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22

Chase, Yun S. "Sound diffraction by an underwater ridge with finite impedance." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/17773.

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23

Kim, Jeong Hoon. "Stochastic turning point problem." Diss., Virginia Tech, 1993. http://hdl.handle.net/10919/40038.

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A one-dimensional refractive, randomly-layered medium is considered in an acoustic context. A time harmonic plane wave emitted by a source is incident upon it and generates totally reflected fields which consist of "signal" and "noise". The statistical properties, i.e., mean and correlation functions, of these fields are to be obtained. The variations of the medium structure are assumed to have two spatial scales; microscopic random fluctuations are superposed upon slowly varying macroscopic variations. With an intermediate scale of the wavelength, the interplay of total internal reflection (g

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24

WEYKER, ROBERT RICHARD. "RESONANCE AND ASYMPTOTIC SERIES BASED IDENTIFICATION OF AN ACOUSTICALLY RIGID SPHERE (SINGULARITY EXPANSION METHOD)." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183850.

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Identification of the resonances and the local determination of the radius of curvature of an acoustically rigid sphere from simulated transient input-output data is presented. The scattering from the sphere is formulated using three techniques: the classic Mie-Lorenz series, the singularity expansion method (SEM), and the asymptotic series approximation. The Mie-Lorenz series is used to provide synthetic data. The SEM and the asymptotic series are used to develop two parametric inverse models. The scattered velocity potential is separated into three components: the reflection, the first creep

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25

Farell, Cesar E. "A theoretical investigation of the low-frequency sound generated by breaking waves." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0002/MQ40967.pdf.

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26

Zhang, Qin. "Acoustic pulse diffraction by curved and planar structures with edges." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/32005.

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Efficient and accurate solutions of acoustic wave diffraction by a rigid step discontinuity and a curved half-plane are derived by the uniform geometrical theory of diffraction. These solutions can be used in seismic data processing to evaluate and, eventually, to improve the existing data processing procedures. They can also find applications in electromagnetics, microwave antenna design, acoustic design and sound engineering. The rigid step discontinuity solution given in this thesis is more accurate than the existing solutions which are based on Kirchhoff theory of diffraction. This solut

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27

Kearns, James A. "An investigation of the diffraction of an acoustic plane wave by a curved surface of finite impedance." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/16749.

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28

McCall, George Samuel II. "An experimental apparatus for measuring underwater acoustic scattering from complex finite cylindrical shells." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/17667.

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29

Xie, Jishi. "Acoustic reflection from temperature microstructure." Thesis, The University of Sydney, 1989. https://hdl.handle.net/2123/26377.

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This thesis develops a numerical technique to predict the acoustic reflection from an arbitrary sound speed microstructure in the ocean (or a temperature microstructure in the fresh water). This numerical technique is able to reproduce the theoretical formulas for calculating the reflection coefficients of two analytically defined transition layers. The 50 kHz acoustic reflection coefficients from the temperature The 50 kHz acoustic reflection coefficients from the temperature microstructure measured in a fresh-water reservoir was predicted to be less than -90 dB and was found to be much we

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30

Treeby, Bradley E. "The effect of hair on human sound localisation cues." University of Western Australia. School of Mechanical Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0192.

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The acoustic scattering properties of the human head and torso match well with those of simple geometric shapes. Consequently, analytical scattering models can be utilised to account for the sound localisation cues introduced by these features. The traditional use of such models assumes that the head surface is completely rigid in nature. This thesis is concerned with modelling and understanding the effect of terminal scalp hair (i.e., a non-rigid head surface) on the auditory localisation cues. The head is modelled as a sphere, and the acoustical characteristics of hair are modelled using a l

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31

Tai, Chih-Che, Karin Keith, and Jamie Price. "Sound and Waves: An Integrated K–8 Approach Supporting the NGSS and CCSS." Digital Commons @ East Tennessee State University, 2015. https://dc.etsu.edu/etsu-works/1000.

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32

Podo, Smardie D. "Comparison of layering effects in the propagation of transient planar stress waves." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/18378.

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33

Guigou, Catherine R. J. "Active control of sound radiation due to subsonic wave scattering from discontinuities on thin elastic beams." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-06062008-171425/.

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34

Ille, Jean-Francois. "Interaction of spatial scales in acoustic radiation from hemi-capped cylinders." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16091.

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35

Puentes, Heras M. "The use of SAW methods in probing near-surface elastic properties." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299101.

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36

Mellema, Garfield Richard. "Subcritical acoustic scattering across a rough fluid-solid interface /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/6098.

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37

Johnson, Jeffrey B. "Interpretation of infrasound generated by erupting volcanoes and seismo-acoustic energy partitioning during strombolian explosions /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/6830.

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38

Aktas, Murat K. Farouk Bakhtier. "Thermoacoustically induced and acoustically driven flows and heat transfer in enclosures /." Philadelphia, Pa. : Drexel University, 2004. http://dspace.library.drexel.edu/handle/1860/313.

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39

Fung, Kin-Hung. "Phononic band gap of locally resonant sonic materials with finite thickness /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?PHYS%202004%20FUNG.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2004.<br>Includes bibliographical references (leaves 73-74). Also available in electronic version. Access restricted to campus users.

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40

Opfer, Holger. "Active cancellation of 3D Tollmien-Schlichting waves in the presence of sound and vibrations." Doctoral thesis, Köln : Dt. Zentrum für Luft- und Raumfahrt e.V., Bibliotheks- und Informationswesen, 2002. http://www.gbv.de/dms/goettingen/370770838.pdf.

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41

Pang, Wai Ming. "Scattering of sound waves by a plane membrane with fixed constraints over circular regions." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268026.

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42

Peterson, Reed Monty. "The Sound of the Waves: Nature and Man in the Works of Kunikida Doppo." Thesis, The University of Arizona, 2004. http://hdl.handle.net/10150/560520.

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43

MEN'SHOV, Igor, and Yoshiaki NAKAMURA. "On Instability of Acoustic Waves Propagating in Stratified Vortical Flows." The Japan Society of Mechanical Engineers, 2002. http://hdl.handle.net/2237/9091.

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44

Roush, Douglas L. "Three-dimensional analysis of Azimuthal dependence of sound propagation through shallow-water internal solitary waves." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Jun%5FRoush.pdf.

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Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, June 2006.<br>Thesis Advisor(s): John A. Colosi. "June 2006." Includes bibliographical references (p.43). Also available in print.

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45

Prior, Mark Kevan. "Low frequency sound propagation in sea surface mixed layers in the presence of internal waves." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243119.

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46

Kierkegaard, Axel. "Numerical investigations of generation and propagation of sound waves in low mach number internal flows /." Stockholm : Department of Aeronautical and Vehicle Engineering, Royal Institute of Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9388.

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47

Shrivastava, Shamit. "Non-linear solitary sound waves in lipid membranes and their possible role in biological signaling." Thesis, Boston University, 2014. https://hdl.handle.net/2144/11049.

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Thesis (Ph. D.)--Boston University<br>Biological macromolecules self-assemble under entropic forces to form a dynamic 20 interfacial medium where the elastic properties arise from the curvature of the entropic potential of the interface. Elastic interfaces should be capable of propagating localized perturbations analogous to sound waves. However, (1) the existence and (2) the possible role of such waves in affecting biological functions remain unexplored. Both these aspects of "sound' as a signaling mechanism in biology are explored experimentally on mixed monolayers of lipids-fluorophores-pro

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48

Maess, Matthias. "Material characterization using nonlinear wave propagation." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/19311.

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49

Quijano, Jorge. "Radiative Transfer Theory Applied to Ocean Bottom Modeling." PDXScholar, 2010. https://pdxscholar.library.pdx.edu/open_access_etds/516.

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Research on the propagation of acoustic waves in ocean bottom sediment is of interest for active sonar applications such as target detection and remote sensing. Currently, all seabed scattering models available in the literature are based on the full solution of the wave equation, which sometimes leads to mathematically intractable problems. In the electromagnetics community, an alternative formulation that overcomes some of this complexity is radiative transfer theory, which has established itself as an important technique for remote sensing. In this work, radiative transfer (RT) theory is pr

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50

Warren, Daniel. "The scattering of sound waves in two-dimensional ducts with discontinuities in height and material property." Thesis, Brunel University, 1999. http://bura.brunel.ac.uk/handle/2438/6618.

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Eigen-mode matching techniques offer a versatile approach for solving acoustic scattering problems in ducts. However, until recently, these techniques have been restricted to problems in which the boundary conditions contain at most one derivative, that is, Neumann, Dirichlet or Robin's conditions. Here a method is developed to solve scattering problems in ducts that are discontinuous in height and have at least one surface described by a high order boundary condition. Attention is focussed on the membrane condition, but the method can be extended to elastic plates and other higher order condi

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