Browsing by Subject "ocean floor"
Now showing items 21-37 of 37
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Impact of lower plate structure on upper plate deformation at the NW Sumatran convergent margin from seafloor morphology
(Elsevier, 2008)Results from multibeam bathymetric data acquired during 2005 and 2006, in the region of maximum slip of the 26 Dec. 2004 earthquake (Mw 9.2) are presented. These data provide high-resolution images of seafloor morphology ... -
Indian Deep-sea Environment Experiment (INDEX): An appraisal
(Pergamon, 2001)Indian Deep-sea Environment Experiment (INDEX) is a multi-disciplinary study to establish baseline conditions and evaluate the possible impact of deep-seabed mining in Central Indian Basin. A disturbance was simulated to ... -
Influence of seabed topography on the distribution of manganese nodules and associated features in the Central Indian Basin: A study based on photographic observations
(Elsevier, 1993)The distribution of manganese nodules and associated rock outcrops and sediment cover in the Central Indian Basin (10 degrees-16 degrees S, 73 degrees-82 degrees E), were studied from seabed photographs in relation to ... -
Micrometeorite flux on Earth during the last ~50,000 years
(American Geophysical Union, 2013)Flux of micrometeorites is estimated by using cosmic spherule counts from a seafloor area of 2.50 ms<sup>2</sup> from the Indian Ocean. The spherules are recovered from sediment samples in close-spaced locations from the ... -
Ocean, Spreading Centre
(Springer, 2011)A midocean ridge, an underwater mountainous feature, extends for a length of about 65,000 km as a single continuous body in the global oceans. It is a window to the Earth's interior, through which magma is continuously ... -
Preference of echo features for classification of seafloor sediments using neural networks
(Springer, 2010)Selection of a set of dominant echo features to classify seafloor sediments using a multilayer perceptron neural network is investigated at two acoustic frequencies (33 and 210 kHz). Several sets of inputs with different ... -
Quantitative seafloor characterization using angular backscatter data of the multi-beam echo-sounding system - Use of models and model free techniques
(Allied, India, 2003)For quantitative seafloor roughness characterization and classification using multi-beam processed backscatter data, a good correlation is indicated among the power law parameters (composite roughness model) and hybrid ANN ... -
Remote acoustic seafloor characterization using numerical model and statistical based stochastic multifractals
(Institute of Applied & Computational Mathematics, 2013)The spatial variability of sediment geoacoustic inversion parameters are estimated employing bathymetric systems such as multi-beam echo-sounder (MBES) and dualfrequency single-beam echo-sounder (SBES) operable at 95 kHz ... -
Seabed surveys of Mormugao Harbour, Central west coast of India
(CSIR-NISCAIR, 1988)Detailed echosounding, side scan sonar and shallow seismics (125 line km) covering an area of 6.2 km2 in the Mormugao harbour provided information on seabed topography, surficial distribution of sediments, their thickness ... -
Seabottom characterization using multibeam echosounder angular backscatter: An application of the composite roughness theory
(IEEE, 2000)Composite roughness theory is used to characterize Southern Ocean bottom backscatter (multibeam) data. Spectral parameters based on Helmholtz-Kirchhof's theory (1) are determined from measured near-normal incidence values. ... -
Seafloor classification using acoustic backscatter echo-waveform - Artificial neural network applications
(IEEE Singapore Section Secretariat, 2006)In this paper seafloor classifications system based on artificial neural network (ANN) has been designed. The ANN architecture employed here is a combination of Self Organizing Feature Map (SOFM) and Linear Vector Quantization ... -
Seafloor classification using echo- waveforms: A method employing hybrid neural network architecture
(IEEE, 2004)This letter presents seafloor classification study results of a hybrid artificial neural network architecture known as learning vector quantization. Single beam echo-sounding backscatter waveform data from three different ... -
Seamounts an additional tool to confirm the nature of the crust and to locate possible mineral resources for dredging
(Taylor and Francis, 1998)Study of bathymetric data for the distal Bengal Fan reveals the presence of positive topographic features resembling seamount. These features exhibit a relief of about 800 m above the surrounding seafloor at 4,400 m and ... -
Sediment redistribution during simulated benthic disturbance and its implications on deep seabed mining
(Pergamon, 2001)A benthic disturbance experiment was conducted in the Central Indian Basin to evaluate the possible effects of sediment redistribution on marine ecosystem during deep-sea mining. The analyses of disturbance features on the ... -
Technological challenges for manganese nodule mining
(Publ. and Inf. Dir., New Delhi, India, 1994)The major technological challenges of deep-sea mining venture involve delineation of mine site and development of mining technology to bring out the minerals from extreme conditions (more than 5 km water depth, 0-3 degrees ... -
The implementation agreement and Indian interests
(International Society of Offshore and Polar Engineers, Cupertino, CA (USA), 1999)The agreement on deep seabed mining regime relating to the implementation of Part 11 of the Third UN Convention on the Law of the Sea of 1982 [hereinafter: the Convention] had come as a blessing in disguise for India in ... -
Use of sparker signal to classify seafloor sediment
(Publ. and Inf. Dir., New Delhi, India, 1994)During the cruise 190 of R.V. Gaveshani, the sparker signal was recorded in the analog form on audio cassettes. This signal has been digitized and a statistical computation, viz. the normalized cross-correlation function ...