<?xml version="1.0" encoding="UTF-8"?>
<rss xmlns:taxo="http://purl.org/rss/1.0/modules/taxonomy/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" version="2.0">
  <channel>
    <title>DRS Community: Institute's contributions</title>
    <link>http://drs.nio.org/drs/handle/2264/1</link>
    <description />
    <image>
      <title>The Channel Image</title>
      <url>http://drs.nio.org/drs/retrieve/1</url>
      <link>http://drs.nio.org/drs/handle/2264/1</link>
    </image>
    <textInput>
      <title>The Community's search engine</title>
      <description>Search the Channel</description>
      <name>search</name>
      <link>http://drs.nio.org/drs/simple-search</link>
    </textInput>
    <item>
      <title>Mangrove ecosystem of India: Conservation and management</title>
      <link>http://drs.nio.org/drs/handle/2264/1450</link>
      <description>Title: Mangrove ecosystem of India: Conservation and management
&lt;br/&gt;
&lt;br/&gt;Authors: Jagtap, T.G.; Murthy, P.S.; Komarpant, D.S.
&lt;br/&gt;
&lt;br/&gt;Abstract: Mangroves are distributed to the lower latitude (32 degrees S - 3 degrees N) in the tropical regions. The maximum diversity and area cover lies in the regions between 25 degrees S - 25 degrees N. These habitats are ecologically productive and are of socio-economic importance. They play a significant role in the sedimentation helping in the land building process, and also protect the same by reducing erosion with the help of their specialised root network. It harbours various kinds of organisms including some of commercial importance. Mangrove regions being rich in detritus (organic matter), serve as a natural nursery for a variety of fishes and shellfishes, and hence are used for aquaculture practices. In spite of their importance, these valuable natural resource of the world are declining rapidly due to their over-exploitation for immediate commercial gains. India has a coastline of about 6,500 km along the mainland. In addition, it also has the coastline of the Andaman and Nicobar and Lakshadweep groups of islands in the Bay of Bengal and the Arabian Sea respectively. Coastal wetlands area of about 63,600 sq km in the country hardly includes about 5% of mangrove cover. Due to unawareness regarding the importance and lack of management in the past has caused enormous damage to the mangrove habitats in the country. Lately, these habitats are categorised under ecological sensitive regions, vide Coastal Regulation Zone (CRZ). Act of the country (Anon. 1990). The present document discusses major biotic constituents of the mangrove ecosystem from India and its conservation and management aspects.</description>
      <pubDate>Mon, 29 Oct 2001 22:58:59 GMT</pubDate>
    </item>
    <item>
      <title>A neural network based seafloor classification using acoustic backscatter</title>
      <link>http://drs.nio.org/drs/handle/2264/1449</link>
      <description>Title: A neural network based seafloor classification using acoustic backscatter
&lt;br/&gt;
&lt;br/&gt;Authors: Chakraborty, B.
&lt;br/&gt;
&lt;br/&gt;Abstract: This paper presents a study results of the Artificial Neural Network (ANN) architectures [Self-Organizing Map (SOM) and Multi-Layer Perceptron (MLP)] using single beam echosounding data. The single beam echosounder, operable at 12 kHz, has been used for backscatter data acquisitions from three distinctly different seafloor's from the Arabian Sea. With some preprocessing of the snapshots, the performance of the SOM network is observed to be quite good. For unsupervised SOM network, only single snapshot is used for the training, and number of snapshots for subsequent testing of the network. Feature selection from ASCII data is an important component for a supervised MLP based network. Four selected features are used for training the network. The test results of the MLP based network are also discussed in the text.</description>
      <pubDate>Mon, 29 Oct 2001 22:58:59 GMT</pubDate>
    </item>
    <item>
      <title>Estimating deep seafloor interface and volume roughness parameters using the multibeam-hydrosweep system</title>
      <link>http://drs.nio.org/drs/handle/2264/1448</link>
      <description>Title: Estimating deep seafloor interface and volume roughness parameters using the multibeam-hydrosweep system
&lt;br/&gt;
&lt;br/&gt;Authors: Chakraborty, B.; Schenke, H.W.; Kodagali, V.N.; Hagen, R.
&lt;br/&gt;
&lt;br/&gt;Abstract: Utilizing a hull-mounted, multinarrow beam echosounder onboard RV Polarstern, variation of acoustic backscatter with incidence angles at two different sites in the Southern Oceans (Agulhas Plateau and the Riiser Larsen Sea) is measured. Using a composite roughness model, including water-sediment interface roughness and sediment volume roughness parameters the data was modeled. The model effectively uses the near normal incidence angle backscatter to determine the seafloor interface roughness parameters employing Helmholtz-Kirchhoff theory. Beyond 20 degrees incidence angles, an application of Rayleigh-Rice theory is made by using a necessary splicing technique (combining both of the theories at 20 degrees incidence angle).The estimated interface and volume roughness parameters are found to be in accordance with the known area geology.</description>
      <pubDate>Mon, 29 Oct 2001 22:58:59 GMT</pubDate>
    </item>
    <item>
      <title>Pyramidal anchor stone from Baga waters of Goa, west coast of India</title>
      <link>http://drs.nio.org/drs/handle/2264/1447</link>
      <description>Title: Pyramidal anchor stone from Baga waters of Goa, west coast of India
&lt;br/&gt;
&lt;br/&gt;Authors: Tripati, S.
&lt;br/&gt;
&lt;br/&gt;Abstract: Underwater exploration in the coastal region off Baga (Goa, India) led to the recovery of an isolated stone artefact, which resembles a pyramidal type of anchor stone. This anchor stone is unlike to other pyramidal anchor stones found elsewhere. Pyramidal anchor stones have an apex hole which goes up to the round hole, however Goa anchor stone has no such perforation, but, instead has a rectangular cutting on the apex. The anchor stone is compared with Greek pyramidal anchor stones, and probably belongs to the early centuries of the Christian era.</description>
      <pubDate>Mon, 29 Oct 2001 22:58:59 GMT</pubDate>
    </item>
  </channel>
</rss>

