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Articles by S. Gunasekaran
Total Records ( 5 ) for S. Gunasekaran
  J Kent and S. Gunasekaran

A significant number of people who come into contact with the police have a mental disorder. Attending the police station to assess detainees forms a significant part of most psychiatrists’ work. The role of the psychiatrist includes assessing for the presence of mental disorder, advising on diversion from custody and assessing detainees’ fitness to be interviewed. This article, based on data primarily from the UK, looks at issues involved for psychiatrists attending police stations, including pathways to care, epidemiology, assessment of detainees under the Mental Health Act 1983, fitness of detainees to be interviewed and aspects of training.

  S. Gunasekaran , S.M. Ramasamy , K. Palanivel , J. Saravanavel and R. Selvakumar
  The developmental index and the developmental planning of a Country/Nation mostly depend on its natural resources potential including water resources. The emerging of Remote Sensing and GIS has substantially reduced the problems of groundwater targeting in various aquifer systems. The groundwater aquifer system in Pudukkottai district is distinctly controlled by western crystalline, central Tertiary sandstone and eastern Quaternary sediments. While the groundwater behavior in crystalline is dominantly controlled by secondary porosity, in Tertiary formation and Quaternary sediments, it is controlled by the primary porosity. The analysis of groundwater levels of 1975, 1985 and 1995 under the 3D GIS environment and their integrations show that the groundwater system in Pudukkottai district is also controlled by the major tectonic features deduced from tectonic and fluvial geomorphological anomalies. The groundwater domes and basins are alternatively aligned in NW-SE direction in western crystalline segment and the groundwater ridge and valley is found in tertiary formation shows the N-S alignment. The groundwater ridge aligned along Gandavarvakkottai-Alangudi indicates that the groundwater movements obstructed by the upliftment of Mio-Pliocene sandstone in between the two N-S faults. The alternatively arranged groundwater ridge and valley in western crystalline are dominantly controlled by the NW-SE major lineaments/faults. The present study revealed that groundwater aquifer system in this region is also controlled by the tectonic grains.
  R. Selvakumar , U.A.B. Rajasimman and S. Gunasekaran
  In South India, tanks system is quiet ancient, meant for storing and supplying water towards multifunctional needs of the people. In Tamil Nadu, there are around 39,000 tanks with varying size and types. Over past few decades, irrigation rely on stable and reliable groundwater resources like dug and deep bore wells, consequently tanks lost their significance. Moreover, excessive siltation, improper maintenance and illegal encroachment further degraded the system. The deterioration factors are broadly categorised into problems in catchment, feeder channels and head works, eventually resulting in loss of storage capacity. The present study chiefly narrates an indirect method of estimating loss in storage capacity of tanks and the catchment problem, especially soil erosion and its induced downward siltation using geoinformatics technology. Using remotely sensed satellite data by measuring surface area of tank loss in storage capacity was estimated through a model relationship. Using Digital Elevation Model derived topographic wetness indices data, the catchment problem especially, soil erosion areas are identified and remedial measures are suggested. Under prevailing water crisis, it is essential to rehabilitate the tanks through which the surface water potential can be improved subsequently the groundwater quality and quantity will be enhanced.
  S. Gunasekaran and K. Duraiswamy
  Problem statement: Multicasting communication network accepted a single message from an application and delivered copies of the message to multiple recipients at different locations. Recently, there has been an explosion of research literature on multicast communication environment. The objective of this study were to contribute the complexity of supporting current multicast applications, (i) the lack of reliable multicast transport mechanisms at the network level and (ii) the lack of network support for large scale multicast communication. The scaling problem of secure multicast key distribution compounded for the case where sender-specific keys need to be distributed to a group and required for sender-specific authentication of data traffic and minimize control overhead (iii) compare RC4, AES-128,RS(2) and RS(3) computation time of both algorithms. Approach: Algorithms were collected and performed computation time. In general the multicast key distribution scheme implemented for distributing 128 bit session keys. Thus the Maximum Distance Separable Codes (MDS Codes) needed for their encoding and decoding process. In rekeying scheme errors were occurred during over period of time or at a particular point of time and to eliminate all these errors in the level of encryption and decryption mechanism. The MDS codes played an important role in providing security services for multicast, such as traffic, integrity, authentication and confidentiality, is particularly problematic since it requires securely distributing a group (session) key to each of a group’s receivers. Results: First we showed that internet multicasting algorithms based on reverse path forwarding were inherently unreliable and present a source-tree-based reliable multicasting scheme also. The new scheme proposed and used as an inter-gateway protocol and worked on top of the previously developed distance vector and link state internet routing schemes. Next, to support large scale applications, we presented a scheme for partial multicasting and introduced a new network level operation, called gather. The partial multicasting mechanism allowed messages to be delivered to subsets of multicast destinations, while the gather operation aids gateways in selectively suppressing redundant messages, thus reducing the message complexity. Conclusion: Hence the findings suggested the control overhead reasonably minimized and using simulations, we investigated the efficiency of our schemes in supporting scalable application domain based multicast communication.
  M. Gomathy , M. Thangaraju , S. Gunasekaran , N.O. Gopal and H. Gopal

The survival of vegetative and sporulated cells of the Bacillus cultures on the seeds of the crop plants was tried in different combinations. One milliliter inoculum with 1 mL adhesive combination or sterile water showed better results followed by 1.5 mL inoculum with 0.5 mL adhesive or sterile water. The population of 5.5x105 cfu seed-1 on black gram, 10.5x105 cfu seed-1 on soybean and 6.5x105 cfu seed-1 on maize were observed after 12 h of incubation in 1 mL sporulated inoculum mixed with 1 mL of rice gruel. The sporulated inoculum along with rice gruel favoured the adherence of the regenerated cells as rice gruel is rich in nutrient content.

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