Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Bok-Kyoung Choi"'
Publikováno v:
Journal of Marine Science and Engineering, Vol 9, Iss 1, p 1 (2020)
To investigate the correlation between underwater noise and sea level, data collected at Ieodo Ocean Research Station (from 15 May to 27 August 2013) were analyzed. Temporal variations in the overall level of underwater noise were similar to those in
Externí odkaz:
https://doaj.org/article/c7974c7ea5144eebb30fe0c2b1f64c4b
Publikováno v:
Journal of Marine Science and Engineering, Vol 8, Iss 3, p 157 (2020)
To investigate the behavioral characteristics of the water temperature inversion layer (TIL), we used data (KODC) from areas in the Northern East China Sea from 1995 to 2016. Water temperature and salinity surveys were conducted 8820 casts over 22 ye
Externí odkaz:
https://doaj.org/article/b8776f8bd4e6404cbcecc58412de4710
Publikováno v:
OCEANS 2017 - Aberdeen.
Underwater sound source position is determined using a line array. However, performance degradation occurs owing to a multipath environment, which generates incoherent signals. For this reason, the system needs advanced signal processing such as high
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f6439d11025a2275edb8d4fb3af26fd
https://doi.org/10.1109/oceanse.2017.8084699
https://doi.org/10.1109/oceanse.2017.8084699
Publikováno v:
OCEANS 2017 - Aberdeen.
In this study, we investigated the effect of water temperature inversion layer on the propagation of acoustic wave in the western coastal sea of Jeju island in April 2015. When the acoustic source and receiver are simultaneously located within the wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::927e8f32f8a5615b043aca13e7f64e17
https://doi.org/10.1109/oceanse.2017.8084622
https://doi.org/10.1109/oceanse.2017.8084622
Publikováno v:
OCEANS 2017 - Aberdeen.
Classification of submerged objects can be performed using broadband sonar and underwater sound scattering analysis. The backscattered signals, composed of specular echo and elastic echo, have information on the submerged target, including its dimens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa9a404ea2ff12ef63c7a758c569d2f0
https://doi.org/10.1109/oceanse.2017.8084845
https://doi.org/10.1109/oceanse.2017.8084845
Autor:
Kang Il Lee, Bok Kyoung Choi
Publikováno v:
Journal of the Korean Physical Society. 65:1858-1862
The present study aims to investigate the propagation of ultrasonic guided waves in an acrylic plate as a cortical-bone-mimicking phantom. The velocities of the guided waves in a 5-mm-thick acrylic plate were measured by using the axial transmission
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a242b24e7132fbb33682f997a6326c71
https://doi.org/10.3938/jkps.65.1858
https://doi.org/10.3938/jkps.65.1858
Autor:
Kang Il Lee, Bok Kyoung Choi
Publikováno v:
Journal of the Korean Physical Society. 65:1036-1039
A new method for measuring the speed of sound (SOS) in trabecular bone by using a time reversal acoustics (TRA) focusing system was proposed and validated with measurements obtained by using the conventional pulse-transmission technique. The SOS meas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97340ca7338aa7d5c4ccbe9c6f81bae7
https://doi.org/10.3938/jkps.65.1036
https://doi.org/10.3938/jkps.65.1036
Publikováno v:
Journal of Mechanical Science and Technology. 22:699-707
The concept of Time Reversal Acoustics (TRA) provides an elegant possibility of both temporal and spatial concentrating of acoustic energy in highly inhomogeneous media. We explored the possibility of generating acoustical signals with arbitrary wave
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f51882dc475d7e9db855a18aa9e802ce
https://doi.org/10.1007/s12206-007-1203-6
https://doi.org/10.1007/s12206-007-1203-6
Publikováno v:
2015 IEEE/OES Eleveth Current, Waves and Turbulence Measurement (CWTM).
We developed a cable type wave monitoring system for real-time observation of wave height in the coastal zone, comprising nine pressure sensors and a total cable length of 500 m. The resulting wave height observations were discontinuous. Thus, we dev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fb6c7eff79547809df06d8a9a01f3d0
https://doi.org/10.1109/cwtm.2015.7098129
https://doi.org/10.1109/cwtm.2015.7098129
Publikováno v:
2015 IEEE Underwater Technology (UT).
Classification of submerged objects can be performed using broadband sonar and underwater sound scattering analysis. The backscattered signals, composed of specular echo and elastic echo, have information on the submerged target, including its dimens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::217cd3fb265f47b5c262b5ea2b02e398
https://doi.org/10.1109/ut.2015.7108222
https://doi.org/10.1109/ut.2015.7108222