DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 4361-4380 of 9443
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Remunerative role of foraminifera in coastal ecosystem
(M.S. Swaminathan Research Foundation, Madras, India, 1994)Due to the direct relationship between climate and economy (through agriculture), predictive models for climatic changes are very much needed. Climatic prediction is a delicate task and depends upon how well know the past ... -
A note on the Pavonina flabelliformis D'Orbigny (benthic foraminifera) from the Arabian Sea
(Association of Korean Geoscience Societies, 1994)The detailed study of the inner shelf surface sediments off Karwar (India) revealed the occurrence of a benthic foraminiferal species Pavonina flabelliformis. This is the first report of this species in the Arabian Sea. ... -
Distribution of manganese nodules, rocks and sediments in the Central Indian Ocean Basin: Factors influencing performance of mining system
(Publ. and Inf. Dir., New Delhi, India, 1994)Manganese nodule abundances in the Central Indian Ocean Basin (CIOB) as noted from seabed photographs (nil to 18.4 kg/m sup(2)) and grabs (nil to 21.5 kg/m sup(2)) are variable. The relative abundance varies from zero to ... -
Study of sub-surface sediments from northern Indian Ocean: Oceanic responses to climatic changes
(Palaeontol. Soc. India, 1994)The mean diameter and variation in isotopic composition (delta sup(18)) in thest of Orbulina universa d'Orbigny have been measured in a sediment core collected from 3869 m water depth near the Carlsberg Ridge, northern ... -
Preliminary backscatter results from the hydrosweep multibeam system
(MTS, Washington, USA, 1994)The alfred Wegener Institute recently contracted with Atlas Elektronik to upgrade the Hydrosweep multibeam bathymetry system on the polar research vessel POLARSTERN. This upgrade not only increased the swath width of the ... -
Monte Carlo simulation of diffuse attenuation coefficient in presence of non uniform profiles
(Publ. and Inf. Dir., New Delhi, India, 1994)This paper presents a Monte Carlo simulation of the vertical depth structure of the downward attenuation coefficient (K sub(d)), and the irradiance reflectance (R) for a given profile of chlorophyll. The results are in ... -
Biological and geophysical aspects of coastal structures
(Indian Inst. of Technol., New Delhi and NIO, India, 1994)Geological processes, that occur in the nearshore environment : The nearshore, environments have been strongly influencEd. by sealevel changes throughout the geological history. Much of the shallow-water region is also ... -
Application of multiplicative array techniques for multibeam sounder systems
(European Acoustics Association, 1994)Multiplicative array processing is well known for its narrow beamwidth and low sidelobe level, but the array gain is quite low. The effectiveness of such a system becomes lower, especially when the signal to noise ratio ... -
Development of drifting buoys
(Publ. and Inf. Dir., New Delhi, India, 1994)Polar orbiting satellites equipped with random access data collection and position fixing systems have made long-term remote oceanographic/meteorological observations possible by means of instrumented drifting buoys fitted ... -
Studies of high resolution array processing algorithms for multibeam bathymetric applications
(MTS, Washington, USA, 1994)In this paper a study is initiated to observe the usefulness of directional spectral estimation techniques for underwater bathymetric applications. High resolution techniques like the Maximum Likelihood (ML) method and the ... -
Vibrocoring technique in the nearshore placer exploration programme along Konkan Coast, Maharashtra
(Publ. and Inf. Dir., New Delhi, India, 1994)As a part of nearshore placer exploration along Konkan Coast, Maharashtra (west coast of India) a detailed vibrocoring was carried out using different types of vibrocorers on vessels each equipped with different handling ... -
Autoregressive spectral analysis of crane vessel motions in sea waves
(CWPRS, Pune, 1994) -
Impressed current cathodic protection of deep water structures
(1994)Of all the various anti-corrosion systems usEd. by offshore structures and ship-building industry to reduce the ravages of sea-water corrosion, cathodic protection is one of the most important. Impressed current cathodic ... -
Optimal estimation of ship's attitudes for beampattern corrections in a coaxial circular array
(Taylor and Francis, 1994)A study is conducted to estimate the accurate attitude of a ship's motion and the estimation is used to arrive at the corrections required for a farfield pattern of a coaxial circular array. The relevant analytical expression ... -
A temperature profiler
(Publ. and Inf. Dir., New Delhi, India, 1994)An instrument developed for measuring temperature profiles at sea in depth or time scales is described. PC-based programming offers flexibility in setting up the instrument for the mode of operation prior to each cast. A ... -
Determination of wave direction using an orbital following buoy
(Publ. and Inf. Dir., New Delhi, India, 1994)Software has been developed in FORTRAN language using a personal computer for the determination of wave direction from time series measurements of heave, pitch and roll of an orbital following buoy. The method of digital ... -
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 ... -
Spectral irradiance measurements using a novel spectroradiometer
(Publ. and Inf. Dir., New Delhi, India, 1994)A novel design of a spectroradiometer has been implemented and tested in the sea to measure underwater optical and physical properties. The spectroradiometer has two high resolution diffraction-based spectrographs assembled ... -
Pipeline crossing across Manori Creek, Bombay; advantages of marine acoustic techniques in route selection
(CWPRS, Pune, 1994)The National Institute of Oceanography (NIO) had carried out such survey in Bombay for obtaining geological informations in order to plan and design a pipeline route crossing Manori Creek to transport fresh water. The ...