Results 211 to 220 of about 23,689 (244)
Some of the next articles are maybe not open access.
Acoustical Classification of the Seafloor
1983Mainly as a result of offshore exploration there is a rapid development of measurement methods for the determination of the properties of the seafloor soils. Acoustic or seismic methods are now mainly used to obtain bottom and sub-bottom profiles.
Jens M. Hovem, Rune M. Holt
openaire +1 more source
Normal incidence seafloor classification using a parametric array
OCEANS 96 MTS/IEEE Conference Proceedings. The Coastal Ocean - Prospects for the 21st Century, 2002A model based classification scheme is proposed for normal incidence return. The model produces a time-series of the signal based on a stochastic realisation of the seafloor. The response is modeled using the Kirchhoff approximation for seafloor interface backscattering and the small perturbation theory for volume contribution.
O. Bergem +3 more
openaire +1 more source
Acoustic seafloor classification [PDF]
, 2004 Acoustic seabed classification is becoming increasingly important for many fields, including marine geology, hydrography and navigation, coastal engineering, environmental sciences, marine biology and fisheries. The main advantages over conventional bottom grabs are the continuous, non-invasive probing of the seabed and a vast reduction in survey time ...
Simons, D.G. +2 more
openaire
Expendable penetrometer for seafloor classification
Geo-Marine Letters, 1982A design is presented for an expendable seafloor penetrometer system for real time classification of marine sediments and estimate for shear strength. An accelerometer in the nose section of an expendable probe senses deceleration after impact with the ocean bottom and provides this data to the underway launch platform via a two-conductor trailing wire
openaire +1 more source
Applied Acoustics, 2020
Abstract Multi-beam echo sounding (MBES) provides high-precision and high-resolution bathymetry data that lay the data foundation for the refinement and accuracy of seafloor terrain classifications. Based on the digital depth model (DDM) of multibeam bathymetry, this paper proposes a seafloor terrain classification method using morphology and pattern
Xiaodong Cui +5 more
openaire +1 more source
Abstract Multi-beam echo sounding (MBES) provides high-precision and high-resolution bathymetry data that lay the data foundation for the refinement and accuracy of seafloor terrain classifications. Based on the digital depth model (DDM) of multibeam bathymetry, this paper proposes a seafloor terrain classification method using morphology and pattern
Xiaodong Cui +5 more
openaire +1 more source
Classification of Seafloor Highs According to Legal Hermeneutics
Asian Journal of International Law, 2020AbstractThe classification of seafloor highs as submarine elevations that are natural components of the continental margin is the core exercise in the application of Article 76 of UNCLOS. Its outcome determines whether the outer limits are necessarily constrained by a 350 nautical mile distance line from the baselines, or, alternatively, whether the ...
openaire +1 more source
A Hierarchical Approach To Seafloor Classification Using Neural Networks
OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology, 2005Preliminary progress toward the automated segmen- tation and classification of undersea terrain is demonstrated with sidescan-sonar imagery from a mid-ocean spreading center. A multilayer, backpropagation neural network was applied to data from three distinct geoacoustic provinces: axial valley, ridge flank, and sediment pond.
W.K. Stewart, M. Marra, M. Jiang
openaire +1 more source
Acoustic classification of a shell-covered seafloor
The Journal of the Acoustical Society of America, 1999Acoustic scattering by the seafloor is sometimes influenced, if not dominated, by the presence of discrete volumetric objects such as shells. Classification of a shell-covered seafloor requires understanding of the acoustic scattering properties of the shells.
openaire +1 more source
Marine seafloor sediment profiling and classification in the Arctic Ocean
OCEANS 2000 MTS/IEEE Conference and Exhibition. Conference Proceedings (Cat. No.00CH37158), 2002Ocean Data Equipment Corporation redesigned their FM Chirp sub-bottom profiler, the Bathy 2000P, for operation aboard a US Navy Sturgeon-class nuclear powered submarine. Normally operated from a surface vessel, the Bathy 2000P was customized to meet specifications provided by scientists from Lamont-Doherty Earth Observatory of Columbia University for ...
T.B. Opishinski, D.D. Caulfield
openaire +1 more source
Mapping And Classification Of Deep Seafloor Habitats
No abstracts are to be cited without prior reference to the author.Using geophysical data collected with a variety of remote sensor systems and in situ biological and geological observations, we have constructed a geologically and biologically based template to be used to standardize habitat types in water depths greater than 30 meters.Greene, H.Gary +8 more
openaire +1 more source