Zobrazeno 1 - 10
of 191
pro vyhledávání: '"Wolfgang Sachse"'
Publikováno v:
Journal of Geophysical Research: Earth Surface. 120:2027-2039
Spontaneous avalanching in specific deserts produces a low-frequency sound known as “booming.” This creates a puzzle, because avalanches down the face of a dune result in collisions between sand grains that occur at much higher frequencies. Repro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::675dbbdfb23c17160252fe3e6fb4f9c3
https://doi.org/10.1002/2015jf003470
https://doi.org/10.1002/2015jf003470
Autor:
Peter A. Lewin, Lawrence A. Crum, Toni Sliwinski, Ewald Benes, Wolfgang Sachse, Juan A. Gallego-Juárez, Luis Gaete-Garreton
Publikováno v:
Ultrasonics. 87:A1-A2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c294cdb41f9de80b644e4ffa3420e1b7
https://doi.org/10.1016/j.ultras.2018.03.007
https://doi.org/10.1016/j.ultras.2018.03.007
Autor:
Osamu Matsuda, Alexei Maznev, Arthur G. Every, Wolfgang Grill, Wolfgang Sachse, J. D. Comins, M. Pluta, J. P. Wolfe, Oliver B. Wright
Publikováno v:
Wave Motion. 50:1197-1217
Crystal acoustics is a field that has engaged the attention of theoreticians and experimentalists alike for decades and more. Many striking effects have been revealed, and elegant analytical techniques applied to their interpretation. This article is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba091123a94c610d321a60794d3c9432
https://doi.org/10.1016/j.wavemoti.2013.02.007
https://doi.org/10.1016/j.wavemoti.2013.02.007
Autor:
Wolfgang Sachse, Stephen D. Holland
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 53:370-376
We discuss an automated procedure for determining the separation between a transient acoustic source and a detector on a plate. We use a time-estimation algorithm based on the assumption that the detected signal is represented by a small, finite numb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04bca553a290d0fd1f179ae8f599c22f
https://doi.org/10.1109/tuffc.2006.1593375
https://doi.org/10.1109/tuffc.2006.1593375
Publikováno v:
The Journal of the Acoustical Society of America. 114:1450-1453
A flat transducer was constructed, using a 9-microm-thick PVDF (polyvinylidene fluoride) film for generation and detection of high-frequency ultrasonic waves, and used for measurements of the phase velocity of longitudinal waves traveling along the t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f300c8bbfb6fcc64a4dbb7734712703f
https://doi.org/10.1121/1.1562650
https://doi.org/10.1121/1.1562650
Publikováno v:
Ultrasonics. 38:620-623
We address the problem of locating a transient source, such as an acoustic emission source, in a plate. We apply time-frequency analysis to the signals detected at a receiver. These highly dispersive and complex waveforms are measured for source-rece
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1dc2741ecfa797aa5aae68a94c9cc9f
https://doi.org/10.1016/s0041-624x(99)00206-1
https://doi.org/10.1016/s0041-624x(99)00206-1
Autor:
Igor Grabec, Wolfgang Sachse
In this monograph, a statistical description of natural phenomena is used to develop an information processing system capable of modeling non-linear relationships between sensory data. The system, based on self-organized, optimal preservation of empi
Publikováno v:
The Journal of the Acoustical Society of America. 103:2296-2301
In this paper analytic formulas are developed for the ray path and travel time of a ray propagating in a wavy fiber–epoxy composite material and calculate them for rays initiating at various points with wave normals of differing directions. The arr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70e10be9ed1933ba347e361d6166533e
https://doi.org/10.1121/1.422748
https://doi.org/10.1121/1.422748
Publikováno v:
The Journal of the Acoustical Society of America. 102:3333-3342
This paper presents analytic formulas for the group velocity of quasilongitudinal, quasitransverse, and shear-horizontally (SH) polarized pure-transverse modes propagating in an arbitrary direction on the symmetry planes of a stressed anisotropic ela
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da8b45a760be6408f6f42e4b54556f21
https://doi.org/10.1121/1.420284
https://doi.org/10.1121/1.420284
Publikováno v:
Composites Science and Technology. 57:753-762
We summarize in this paper some of the challenges of making ultrasonic measurements in thick composites and, in particular, in determining non-destructively the matrix of elastic constants of such materials. The procedure relies on the point-source/p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7d732fe56170658d2a6c18b12e6952f
https://doi.org/10.1016/s0266-3538(97)80014-0
https://doi.org/10.1016/s0266-3538(97)80014-0