Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Harry J. Simpson"'
Demonstration of a quasi-monostatic autonomous underwater vehicle based high duty cycle active sonar
Autor:
Zachary J. Waters, Alain R. Berdoz, Jason Kost, Michael L. Saniga, Brian H. Houston, Timothy J. Yoder, Paul J. Gendron, D Amon, Harry J. Simpson
Publikováno v:
The Journal of the Acoustical Society of America. 145:EL90-EL96
The feasibility of resolving target returns within receive signals collected by a continuously transmitting quasi-monostatic, broadband, autonomous underwater vehicle (AUV) based sonar is explored. Theoretical studies supported by experimental result
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71117a965fad4c45bbbc541e756c5098
https://doi.org/10.1121/1.5088029
https://doi.org/10.1121/1.5088029
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Following the derivation presented by Press and Ewing [Geophysics 15, 426-446 (1950)], a normal mode solution for the Pekeris waveguide problem with an elastic bottom is outlined. The analytic solution is benchmarked against data collected in an expe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47f6fb567f8f5f77f8741f1ab02e3abf
https://doi.org/10.1121/1.4740227
https://doi.org/10.1121/1.4740227
Publikováno v:
The Journal of the Acoustical Society of America. 131:318-326
Iterative, single-channel time reversal is employed to isolate backscattering resonances of an air-filled spherical shell in a frequency range of 0.5-20 kHz. Numerical simulations of free-field target scattering suggest improved isolation of the domi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4130060d456e2db0f211bcee6e21fe2d
https://doi.org/10.1121/1.3669971
https://doi.org/10.1121/1.3669971
Publikováno v:
The Journal of the Acoustical Society of America. 129:3453-3456
A 48 m rail with a moving receiver was used to measure forward scattering from a spherical shell lying on the bottom in the Gulf of Mexico. The target was mid-way between the source and rail, on a line from the source bisecting the rail. The major ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5cce9d5fb4f66302cdad1380efe9ab26
https://doi.org/10.1121/1.3589251
https://doi.org/10.1121/1.3589251
Autor:
Felipe A. Bulat, Brian H. Houston, Harry J. Simpson, M Saniga, Larry A. Kraus, J. A. Bucaro, Saikat Dey, Angie Sarkissian
Publikováno v:
The Journal of the Acoustical Society of America. 129:2979-2990
This paper describes a high-order, finite-element-based, three-dimensional time-harmonic model for large-scale exterior structural-acoustics problems. It is applicable to both freefield and littoral environments. For the freefield case, the infinite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2884a105f5f8189ae58be2b357497679
https://doi.org/10.1121/1.3569729
https://doi.org/10.1121/1.3569729
Autor:
Brian H. Houston, Harry J. Simpson
Publikováno v:
The Journal of the Acoustical Society of America. 144:1959-1959
A series of measurements in the NRL shallow water laboratory were designed and conducted to measure the sound waves propagating in an un-consolidated fluid-saturated porous medium. The novel design used a pair of small receivers, one buried in the bo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7d1829c1d5ddd91b3eca33d33c256c4
https://doi.org/10.1121/1.5068562
https://doi.org/10.1121/1.5068562
Autor:
J. A. Bucaro, Larry A. Kraus, Harry J. Simpson, Timothy J. Yoder, Brian H. Houston, Louis R. Dragonette
Publikováno v:
The Journal of the Acoustical Society of America. 126:EL171-EL176
Laboratory underwater bistatic scattering measurements are reported for free, proud, and half-buried unexploded ordnances for 0 degrees and 90 degrees source angles. Forward echoes are larger than backscattered returns, and half burial significantly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76b03cb8d754c87aea106187e7291c4b
https://doi.org/10.1121/1.3253683
https://doi.org/10.1121/1.3253683
Autor:
Xiao Liu, Harry J. Simpson, Brian H. Houston, H. Haucke, Douglas M. Photiadis, Jeffrey W. Baldwin, Joseph F. Vignola
Publikováno v:
Materials Science and Engineering: A. :389-392
In order to understand the consensus that mechanical loss of an oscillator increases as its size decreases, we studied the internal friction of a 1.5 μm thick micro-mechanical oscillator with laser Doppler vibrometry. We separated the loss due to at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b0c7cdf6c6784cfd176e848055f199e
https://doi.org/10.1016/j.msea.2008.10.065
https://doi.org/10.1016/j.msea.2008.10.065
Autor:
Brian H. Houston, Alain R. Berdoz, Larry A. Kraus, Steve W. Liskey, Philip A. Frank, Carl K. Frederickson, Steve Stanic, Erik C. Porse, Harry J. Simpson
Publikováno v:
The Journal of the Acoustical Society of America. 121:85-97
Shallow-water propagation experiments were carried out in St. Andrews Bay, Florida. These investigations used a vertical one-dimensional synthetic array measurement system where two hydrophones incrementally mapped the acoustic pressure from 2m below
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd32a2a0fdb68ca8bceff7b1dc438cc8
https://doi.org/10.1121/1.2372449
https://doi.org/10.1121/1.2372449
Publikováno v:
The Journal of the Acoustical Society of America. 113:39-42
Laboratory measurements of low frequency (1–10 kHz) evanescent wave field scattering from a sphere buried in water-saturated sand was examined. A 60 cm stainless steel sphere was buried just below a sand–water interface and the acoustic backscatt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ad59271dab786a7dfde669bab117a03
https://doi.org/10.1121/1.1523310
https://doi.org/10.1121/1.1523310