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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Acoustic scattering by near-surface inhomogeneities in porous media

Berry, David Leonard January 1990 (has links)
No description available.
2

Statistical properties of waves diffracted by a random phase screen

Roberts, D. L. January 1985 (has links)
No description available.
3

Turbulent boundary layer flow over undulating surfaces

Belcher, Stephen E. January 1990 (has links)
No description available.
4

Application of Cepstral techniques to the measurement of reflection coefficients for dispersive systems

Khalili, Nasser January 1991 (has links)
No description available.
5

Boundary element formulations for radiation and scattering problems

Rega Silva, Jose Jererson do January 1993 (has links)
No description available.
6

Fast integral equation methods for large acoustic scattering analyses

Suchivoraphanpong, Varanyu January 2000 (has links)
No description available.
7

Transient stress analysis by the transmission line method

Boston, Ian Edward January 1992 (has links)
No description available.
8

Propagation characteristic measurement and frequency reuse planning in a campus environment.

January 1994 (has links)
by Poon Lai Shun. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1994. / Includes bibliographical references (leaves 59-[64]). / Chapter 1 --- Introduction --- p.1 / Chapter 2 --- Background of Measurement in Indoor Environment --- p.7 / Chapter 2.1 --- Propagation loss --- p.8 / Chapter 2.1.1 --- Basic concepts --- p.8 / Chapter 2.1.2 --- Indoor propagation --- p.13 / Chapter 2.2 --- Multipath characteristics --- p.15 / Chapter 3 --- Propagation Model --- p.17 / Chapter 4 --- Measurement Sites and Equipment Setup --- p.21 / Chapter 4.1 --- Measurement sites --- p.21 / Chapter 4.2 --- Equipment setup --- p.22 / Chapter 5 --- Measurement Results --- p.27 / Chapter 5.1 --- Propagation loss in the same building --- p.27 / Chapter 5.1.1 --- Measurement in Engineering Building --- p.27 / Chapter 5.1.2 --- Measurement in Hostel --- p.30 / Chapter 5.2 --- Penetration across the atrium and neighboring building --- p.31 / Chapter 5.3 --- Multipath characteristics --- p.33 / Chapter 6 --- Frequency Reuse Planning and Limitations on Measurement --- p.50 / Chapter 6.1 --- Frequency reuse planning --- p.50 / Chapter 6.2 --- Limitations on the propagation loss measurement --- p.53 / Chapter 6.3 --- Limitations on multipath measurement --- p.54 / Chapter 7 --- Conclusions --- p.55 / Appendix --- p.56 / Chapter A --- Method of Calculating Path Loss Slope --- p.56 / Bibliography --- p.59
9

Analysis of non-axisymmetric wave propagation in a homogeneous piezoelectric solid circular cylinder of transversely isotropic material

Shatalov, MY, Every, AC, Yenwong-Fai, AS 13 March 2008 (has links)
a b s t r a c t A study concerning the propagation of free non-axisymmetric waves in a homogeneous piezoelectric cylinder of transversely isotropic material with axial polarization is carried out on the basis of the linear theory of elasticity and linear electro-mechanical coupling. The solution of the three dimensional equations of motion and quasi-electrostatic equation is given in terms of seven mechanical and three electric potentials. The characteristic equations are obtained by the application of the mechanical and two types of electric boundary conditions at the surface of the piezoelectric cylinder. A novel method of displaying dispersion curves is described in the paper and the resulting dispersion curves are presented for propagating and evanescent waves for PZT-4 and PZT-7A piezoelectric ceramics for circumferential wave numbers m = 1, 2, and 3. It is observed that the dispersion curves are sensitive to the type of the imposed boundary conditions as well as to the measure of the electro-mechanical coupling of the material.
10

Investigation and development of VHF ground-air propagation computer modeling including the attenuating effects of forested areas for within-line-of-sight propagation path

Chamberlin, Kent A. January 1982 (has links)
Thesis (Ph. D.)--Ohio University, March, 1982. / Title from PDF t.p.

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