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Articles by P. Perumal
Total Records ( 6 ) for P. Perumal
  C. Santhosh Kumar and P. Perumal
  An investigation was made on the influence of physico-chemical parameters on zooplankton composition of Ayyampatinam coastal region situated in southeast coast of India (Lat. 09°54’ N: Long. 79°08’ E). Quantitative and qualitative analysis of zooplankton besides physico-chemical parameters were carried out from October 2007 to September 2008. 45 species of zooplankton were recorded, Copepoda formed the major fraction (44%) followsed by other metazoans (25%), decapodal larval forms (15%), Ciliats (8%), Foraminiferans (3%), Hydromedusae (2%), Decapoda (2%) and Appendicularians (1%). Higher values of zooplankton density and species diversity were found during premonsoon and summer seasons. The seasonal distribution and abundance of zooplankton are discussed in relation to hydrographical parameters.
  P. Perumal , M.S. Geetha Devasena and R. Ramya
  The web search engines are used to extract query specific information from this massive pool of World Wide Web. A large number of different search engines are available for the user to satisfy their needs. Every search engine uses its own specific algorithm to rank the list of web pages returned by the search engine for the users query, so that the most relevant page appears first in the list. Users think which search engine should be selected for searching corresponding data to any query topic for efficient search. For decision making on the basis of search result, users want to know whether they are significantly different or not. The internet contains vast amount of information that the search engines are able to provide search results that are based on page ranks. But the search results are not related to one particular user’s environment. In this project, a new system called as enhanced filter based personalized semantic search which would be able to provide results for search query that relates to a particular user’s environment, his area of interests, his likes and dislikes, the data the he/she might have found to be useful for him while searching for providing personalized search results. This process can be able to make applicable for each and every registered user in this application. User can give their basic information in their profile and get benefits from their each and every search. By this way the user can obtain results faster and more accurately. Once the search is complete one can bookmark the links of the search so that it is stored in one’s profile so that it can be used for further reference one can also share the link to other profile by either sending the link as a mail or sharing with other users. Hence a more clear and informative search is done according to one’s interest and domain.
  A. Geetha and P. Perumal
  This study deals, the durability and strength of concrete using admixtures. This addition of water proofing admixtures turns concrete into a construction material in harmony with sustainable building development. The addition of water proofing admixtures also increases the various strength of concrete. These studies were carried out by conducting tensile, compressive and flexural strength tests of the concrete specimen with and without admixtures for various dosages and various curing periods of 7 and 28 days. For flexural strength concrete prism of size 100x100x500 mm, for compression test cube of 150x150x150 mm, for split tensile test cylinders of 150x300 mm. For durability study permeability tests were conducted on the cube specimen of size 150x150x150 mm. The results showed that the presence of waterproofing admixtures always improves the corrosion resistance and thus, increases the strength of concrete.
  P. Damotharan , N. Vengadesh Perumal , M. Arumugam , P. Perumal , S. Vijayalakshmi and T. Balasubramanian
  The spatial, temporal and tidal dynamics of the zooplankton community of the Kodiakkarai (also known as point calimere ) was studied from September 2006 to August 2007. The monthly sampling procedure included the measurement of hydrological parameters salinity, temperature, pH and the collection of zooplankton with plankton net (0.35 m mouth diameters), made up of bolting silk (Cloth No. 10; mesh size 158) for 20 min. The hydrographical parameters were found to very month-wise and station-wise. Air temperature showed summer peak and pre-monsoon, post-monsoon and monsoon decline and the variations were associated with the seasonal changes of meteorological events. Salinity was high during the post monsoon and summer seasons and low during the monsoon season at both stations and was mainly influenced by the rainfall pattern. pH was high during the monsoon and summer seasons and low during the monsoon and post-monsoon seasons at both stations and the rainfall mainly influenced the variation. Dissolved oxygen concentration was high during the monsoon season and low during the summer season at both stations. Distribution of dissolved nutrients also exhibited considerable seasonal due to the flooding and land runoff. The silicate concentration was especially found to be much higher than other nutrients. Among the 121 zooplanktonic forms recorded, the Copepoda formed the dominant group followed by larvae.
  L. Jagadeesan , M. Manju , P. Perumal and P. Anantharaman
  Investigations on physico-chemical parameters like temperature, pH, salinity, dissolved oxygen (DO), nitrate, nitrite, inorganic phosphate and silicate were carried out in two different zones of Vellar estuary, South east coast of India from Sep. 2006 to Aug. 2008. Nitrate, silicate and DO were relatively high in monsoonal months (Oct-Dec) than the non-monsoonal months. Salinity, pH, atmospheric and water temperatures showed their maximum in middle of summer (May) and onset of pre-monsoon (June), whereas their values were minimum in monsoon. Two way ANOVA indicates, spatial and temporal variation of salinity which showed significant differences, but the other parameters showed significant temporal variations only. Factor analysis revealed that three principal components (PCS) contribute 84.47% total variances in physico-chemical characteristics of Vellar estuary, in which the first component attributed to river run-off from agricultural lands, mangrove leaf litters from Pichavaram mangroves (55.98%), the second to influx of neritic water from Bay of Bengal (17.72%) and the third to anthropogenic activities (10.77%). Maximal influence on first factor in physico-chemical parameters was found during the monsoonal months, thereafter it’s influences were declined when the second factor make dominance into estuary. Third factor influences were found throughout year but their effects depends upon first two factors.
  M. Rajkumar , R. Thavasi , P. Perumal and Jean-Paul Trilles
  The attempt of the present study is to achieve an approach of the magnitude of parasite induced secondary infection estimation of Vibrio, Salmonella and Pseudomonas loads as well as the total heterotrophic bacteria using a battery of biochemical tests. The parasitic isopod Nerocila phaiopleura was collected from commonly available fish Stolephorus commersonii at Parangipettai, India. Parasites settled on the branchial and external body surface of the fish causes red coloured skin lesions, where secondary bacterial infections were detected. THB and Vibrio counts were higher in the infected hosts than in the healthy fish and it was found to 7.2x105 and 3.5x103 cfu g-1 in branchial regions and 5.4x105 and 2.3x103 cfu g-1 in the body surfaces, respectively. Salmonella counts were found as 6.0x103 and 3.6x101 cfu g-1 in branchial regions of the infected and uninfected fish and in body regions, 3.9x103 and 1.03x102 cfu g-1, respectively. Pseudomonas counts were 7.0x102, 4.9x101 cfu g-1 in branchial regions and 6.2x102, 5.8x101 cfu g-1 in the body surfaces of the infected and uninfected fish. Statistical analysis of the results (t-test) showed high significant value (p<0.05).
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