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- S. Ramesh
- V. Doss Prakash
- C. S. Sandhya
- R. Ramesh
- D. Sathianarayanan
- N. V. Vinithkumar
- Kalachand Sain
- Maheswar Ojha
- Nittala Satyavani
- T. Ramprasad
- S. K. Das
- Harsh Gupta
- N. Vedachalam
- A. N. Subramanian
- G. Harikrishnan
- T. Chowdhury
- V. B. N. Jyothi
- S. B. Pranesh
- M. A. Atmanand
- N. Thulasi Prasad
- K. N. V. V. Murthy
- D. Gobichandhru
- M. Murugesan
Journals
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Ramadass, G. A.
- Application of Indigenously Developed Remotely Operated Vehicle for the Study of Driving Parameters of Coral Reef Habitat of South Andaman Islands, India
Abstract Views :210 |
PDF Views:103
Authors
S. Ramesh
1,
G. A. Ramadass
1,
V. Doss Prakash
1,
C. S. Sandhya
1,
R. Ramesh
1,
D. Sathianarayanan
1,
N. V. Vinithkumar
2
Affiliations
1 National Institute of Ocean Technology (NIOT), Ministry of Earth Sciences, Government of India, Chennai 600 100, IN
2 Andaman and Nicobar Centre for Ocean Science and Technology, NIOT, Port Blair 744 103, IN
1 National Institute of Ocean Technology (NIOT), Ministry of Earth Sciences, Government of India, Chennai 600 100, IN
2 Andaman and Nicobar Centre for Ocean Science and Technology, NIOT, Port Blair 744 103, IN
Source
Current Science, Vol 113, No 12 (2017), Pagination: 2353-2359Abstract
Coral reef biodiversity in South Andaman Islands, India was studied using indigenously developed remotely operated underwater vehicle, PROVe. The vehicle was manoeuvred in coral reef habitats using underwater navigational aids to record faunal assemblages along with underwater spatio-temporal spectral irradiance characteristics coupled with surface radiance, water temperature, salinity and underwater visuals by high-definition camera devices. PROVe-based observations and the outcome from scientific payloads indicated that it will be a new additional tool for the Indian scientific community to map coral reef habitats, correlate and validate the satellite-derived parameters to understand coral reef health.Keywords
Coral Reef, Driving Parameters, Remotely Operated Vehicle, Spectral Irradiance.References
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- Baker, A. C., Glynn, P. W. and Riegl, B., Climate change and coral reef bleaching: an ecological assessment of long-term impacts, recovery trends and future outlook. Estuarine Coastal Shelf Sci., 2008, 80(4), 435–471.
- D’Angelo, C. and Wiedenmann, J., Impacts of nutrient enrichment on coral reefs: new perspectives and implications for coastal management and reef survival. Curr. Opin. Environ. Sustain., 2014, 7, 82–93.
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- Ramadass, G. A. et al., Deep-ocean exploration using remotely operated vehicle at gas hydrate site in Krishna–Godavari basin, Bay of Bengal. Curr. Sci., 2010, 99(6), 809–815.
- Jhunjhunwala, T., Upadhyay, V., Sirikonda, R., Balasubramaniam, K. and Rajagopal, P., MIKE: a remotely operated vehicle (ROV) for visual inspection of underwater structures. Non Destructive Evaluation 2015. Abs., 2015, 220C, 215.
- Ramesh, S., Sathianarayanan, D., Ramesh, R., Harikrishnan, G., Vadivelan, A., Ramadass, G. A. and Atmanand, M. A., Qualification of polar remotely operated vehicle at East Antarctica. OCEANS 2016 MTS/IEEE Conference, 2016, pp. 1–5.
- Vedachalam, N. et al., Design and development of remotely operated vehicle for shallow waters and polar research. IEEE Underwater Technology (UT) Conference, 2015, pp. 1–5.
- Ramesh, R., Bala Naga Jyothi, B., Vedachalam, N., Ramadass, G. A. and Atmanand, M. A., Development and performance validation of navigation system for underwater vehicles. J. Navig., 2016, 69, 1097–1113.
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- Gareth, J. W., Jennifer, E. S., Eric, J. C., Jamison, M. G., Enric, S. and Stuart, A. S., Benthic communities at two remote Pacific coral reefs: effects of reef habitat, depth, and wave energy gradients on spatial patterns. Peer, J., 2013, 1, e81.
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- Joseph, F. P. et al., Sediment and turbidity associated with offshore dredging increase coral disease prevalence in nearby reefs. PLoS ONE, 2014, 9, e102498.
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- Gas-Hydrates in Krishna-Godavari and Mahanadi Basins: New Data
Abstract Views :212 |
PDF Views:0
Authors
Kalachand Sain
1,
Maheswar Ojha
1,
Nittala Satyavani
1,
G. A. Ramadass
2,
T. Ramprasad
3,
S. K. Das
4,
Harsh Gupta
1
Affiliations
1 CSIR - National Geophysical Research Institute, Uppal Road, Hyderabad - 500 007, IN
2 National Institute of Ocean Technology, Velachery-Tambaram Main Road, Chennai - 600 100, IN
3 CSIR-National Institute of Oceanography, Dona Paula, Goa - 403 004, IN
4 Ministry of Earth Sciences, Prithvi Bhavan, Lodhi Road, New Delhi - 110 003, IN
1 CSIR - National Geophysical Research Institute, Uppal Road, Hyderabad - 500 007, IN
2 National Institute of Ocean Technology, Velachery-Tambaram Main Road, Chennai - 600 100, IN
3 CSIR-National Institute of Oceanography, Dona Paula, Goa - 403 004, IN
4 Ministry of Earth Sciences, Prithvi Bhavan, Lodhi Road, New Delhi - 110 003, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 79, No 6 (2012), Pagination: 553-556Abstract
Gas-hydrates are crystalline substances consisting of mainly methane and water, and occur in shallow sediments of outer continental margins and permafrost regions. They are formed at high pressure and low temperature regime when supply of methane gas exceeds the solubility limit. Unlike natural gas, oil and minerals, gas-hydrates are not stable at standard temperature and pressure (STP). One volume of gas-hydrates, when dissociated, releases 164 volumes of methane at STP. Since methane is the lowest molecular weight hydrocarbon, use of gas-hydrates as fuel will cause less pollution to the environment. These have attracted the global attention due to their natural occurrences in abundance and huge energy potential. The methane locked as gas-hydrates is envisaged as 1-120 x 1015 m3 (Boswell and Collett, 2011). Only 15% recovery from this gigantic reserve may be sufficient to meet the global energy requirement for about 200 years (Makogon et al. 2007). Thus, gas-hydrates seem to be a viable major energy resource of future, and have been identified globally either by geophysical, geochemical and geological surveys or by drilling and coring (Boswell and Saeki, 2011; Ruppel, 2011; Sain and Gupta, 2012). Besides having the energy potential, the study of gas-hydrates is also important from natural hazards point of view related to seafloor subsidence, slumps and slides (Gupta and Sain, 2011).References
- BOSWELL, R. and SAEKI, T. (2010) Motivations for the geophysical investigation of gas hydrates. In: M. Riedel, E. Willoughby, and S. Chopra (Eds.), Geophysical Characterization of Gas Hydrates. Society of Exploration Geophysicists Geophysical Developments Series 14, pp.23-32.
- BOSWELL, R. and COLLETT, T.S. (2011) Current perspectives on gas hydrate resources. Energy Environmental Science, v.4, pp.1206-1215
- COLLETT, T.S., RIEDEL, M., COCHRAN, J., BOSWELL, R., PRESLEY, J., KUMAR, P., SATHE, A.V., SETHI, A.K., LALL, M., SIBAL, V.K., NGHP EXPEDITION 01 SCIENTISTS, 2008 AND NGHP EXPEDITION 01 (2006), Initial Reports, Directorate General of Hydrocarbons, Noida and Ministry of Petroleum & Natural Gas, India. 4 volumes.
- GUPTA, H.K. and SAIN, K. (2011) Gas-hydrates: Natural Hazard. In: P. Bobrowsky (Ed.), Encyclopedia of Natural Hazards. Springer, in press.
- MAKOGON, Y.F., HOLDITCH, S.A. and MAKOGON, T.Y. (2007) Natural gas hydrates - A potential energy source for the 21st Century. Jour. Petrol. Sci. Engg., v.56, pp.14–31.
- RAMADASS, G.A., RAMESH, S., SELVAKUMAR, J.M., RAMESH, R., SUBRAMANIAN, A.N., SATHIANARAYANAN, D., HARIKRISHNAN, G., MUTHUKUMARAN, D., JAYAKUMAR, V.K., CHANDRASEKARAN, E., MURUGESH, M., ELANGOVAN, S., PRAKASH, V.D., RADHAKRISHNAN M. and VADIVELAN, M. (2010) Deep-ocean exploration using remotely operated vehicle at gas hydrate site in Krishna– Godavari basin, Bay of Bengal. Curr. Sci., v.99, pp.809815.
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- Unmanned Underwater Vehicles: Design Considerations and Outcome of Scientific Expeditions
Abstract Views :257 |
PDF Views:86
Authors
G. A. Ramadass
1,
S. Ramesh
1,
N. Vedachalam
1,
A. N. Subramanian
1,
D. Sathianarayanan
1,
R. Ramesh
1,
G. Harikrishnan
1,
T. Chowdhury
1,
V. B. N. Jyothi
1,
S. B. Pranesh
1,
V. Doss Prakash
1,
M. A. Atmanand
1
Affiliations
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
Source
Current Science, Vol 118, No 11 (2020), Pagination: 1681-1686Abstract
In India, scientific investigations of ocean basins have been in progress for more than five decades using indirect and direct measurement devices. These studies were aimed at resource identification, ecological, palaeo-oceanographic and palaeo-climatic research. To cater to the need of the ocean community, Remotely Operated Vehicles (ROV) rated for 6000 m (ROSUB 6000) and 500 m (PROVe-500) operational depths have been developed at the National Institute of Ocean Technology, MoES, Chennai. This article reports the design considerations for unmanned remotely operated underwater vehicles and the outcome of scientific expeditions conducted for deep sea mineral exploration, ocean biodiversity and polar science.Keywords
Biodiversity, Ocean Resources, Remotely Operated Vehicle.References
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- Vedachalam, N. et al., Design and development of remotely operated vehicle for shallow waters and polar research. In Underwater Technology (UT), Chennai, India, 2015, pp. 1–5.
- Ramadass, G. A. et al., Deep-ocean exploration using remotely operated vehicle at gas hydrate site in Krishna–Godavari basin, Bay of Bengal. Curr. Sci., 2010, 99, 809–815.
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- Ramesh, S., Ramadass, G. A., Doss Prakash, V., Sandhya, C. S., Ramesh, R., Sathianarayanan, D. and Vinithkumar, N. V., Application of indigenously developed remotely operated vehicle for the study of driving parameters of coral reef habitat of South Andaman Islands, India. Curr. Sci., 2017, 113(12), 2353–2359.
- Vedachalam, N., Ramesh, R., Muthukumaran, D., Aarthi, A., Subramanian, A. N., Ramadass, G. A. and Atmanand, M. A., Reliabilitycentered development of deep water ROV ROSUB 6000. Mar. Technol. Soc. J., 2013, 47, 55–71.
- Ramesh, R., BalanagaJyothi, V., Vedachalam, N., Ramadass, G. A. and Atmanand, M. A., Development and performance validation of navigation system for an underwater vehicle. J. Navigation, 2016, 69, 1097–1113.
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- Ramesh, S., Sathianarayanan, D., Ramesh, R., Harikrishnan, G., Vadivelan, A., Ramadass, G. A. and Atmanand, M. A., Qualification of polar remotely operated vehicle at East Antarctica. Oceans16, MTS/IEEE Monterey, 2016, pp. 1–5.
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- Challenges in Developing Deep-Water Human Occupied Vehicles
Abstract Views :270 |
PDF Views:155
Authors
G. A. Ramadass
1,
N. Vedachalam
1,
S. Ramesh
1,
D. Sathianarayanan
1,
A. N. Subramanian
1,
R. Ramesh
1,
T. Chowdhury
1,
S. B. Pranesh
1,
M. A. Atmanand
1
Affiliations
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
Source
Current Science, Vol 118, No 11 (2020), Pagination: 1687-1693Abstract
Human occupied vehicles (HOV) offer enhanced manoeuvering over the remotely operated vehicles and autonomous underwater vehicles. The presence of human increases the dexterity of the HOV operations, but at the same time, the man-rated vehicle design and operation requires significant attention to vehicle reliability, and in turn human safety. This article details the challenges involved in the design and development of deep water HOV, with specific reference to the 6000 m depth-rated HOV designed by the MoES– National Institute of Ocean Technology for enhancing India’s engineering capability in the deep ocean scientific research.Keywords
Ballast, Batteries, Deep Ocean, Human Occupied Vehicle, Navigation.References
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- Vedachalam, N., Ravindran, M. and Atmanand, M. A., Technology developments for the strategic Indian blue economy. Mar. Georesour. Geotechnol., 2018; doi:org/10.1080/1064119X.2018. 1501625.
- Vedachalam, N., Ramesh, R., Muthukumaran, D., Aarthi, A., Subramanian, A. N., Ramadass, G. A. and Atmanand, M. A., Reliabilitycentered development of deep water ROV ROSUB 6000. Mar. Technol. Soc. J., 2013, 47(3), 55–71.
- Vedachalam, N. et al., Concept and testing of a remotely operated vehicle-mountable inductive electro-thermal polar under-ice corer. Mar. Technol. Soc. J., 2017, 51(6), 33–43.
- Muthukrishna Babu, S., Ramesh, N. R., Muthuvel, P., Ramesh, R., Deepak, C. R. and Atmanand, M. A., In-situ soil testing in the Central Indian Ocean basin at 5462-m water depth. Int. J. Offshore Polar, 2014, 24(3), 213–217.
- Varshney, N., Rajesh, S., Ramesh, N. R., Vedachalam, N., Ramadass, G. A. and Atmanand, M. A., Estimation of reliability of underwater poly metallic nodule mining machine. Mar. Technol. Soc. J., 2015, 49(1), 131–147.
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- Design and Development of Human Metabolic Simulator for a Deepwater Manned Submersible
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Authors
C. S. Sandhya
1,
S. Ramesh
1,
N. Thulasi Prasad
1,
K. N. V. V. Murthy
1,
D. Gobichandhru
1,
M. Murugesan
1,
N. Vedachalam
1,
G. A. Ramadass
1
Affiliations
1 Deep-Sea Technologies Group, National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
1 Deep-Sea Technologies Group, National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
Source
Current Science, Vol 122, No 2 (2022), Pagination: 187-194Abstract
In order to cater to the scientific demand for deep ocean exploration with human presence, manned submersible capable of operating up to 6000 m depth is being designed and developed at National Institute of Ocean Technology. The submersible can accommodate three personnel inside the confined space volume of 4.8 m3 human capsule (personnel sphere) for total endurance of 108 h (12 h normal mission and 96 h in case of emergency). Human Metabolic Simulator was developed by following Det Norske Veritas guideline to validate the life support system design during initial stages of qualification inside the personnel sphere. By considering human respiratory quotient (RQ), HMS was designed by combusting propane gas (RQ 0.6) to produce carbon dioxide, water and heatKeywords
Human Metabolic Simulator, Life Support System, Manned Submersible, Personnel Sphere, Respiratory Quotient.References
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