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Articles by S. Ramesh
Total Records ( 7 ) for S. Ramesh
  S. Ravikumar , S. Chandrasekaran and S. Ramesh
  The objective of the research work is to propose a safety assessment model for an automotive software design as an interacting distributed software component towards traceability. The existing challenges in the automotive software are the composability of the distributed design components and the traceability of the fully assembled or partially assembled design software components. The safety of the composable design does not only depend on the individual software component behavior but also depends on the traceability of each of them in every possible level in both the directions. In such distributed design environment, the software design components can be classified into three types as influential, in-connection and in-absentia types. The proposed research explores a formal approach for the Safety Assessment Logic (SAL) with prevailing the Safety Integrity Levels (SIL). The set of distributed parameters which may cause the risk are studied using a Safety Assessment, Design document (SAD). The distributed SADs are reported to a central server as Document as a Service (DaaS) for carrying out the safe transactions and alert messages across the system. Safety components from each category are considered like air-bag release time, anti-lock braking system and parking distance parameters are tested under various environment conditions.
  S. Ravi , S. Ramesh and B. Chandrasekaran
  Field experiments were conducted during Kharif 2000 and 2001 in the wetland research farm of Tamil Nadu Agricultural University, Coimbatore to study the effects of green manuring and fertilizer N application based on LCC grades on the yield enhancement, nutrient uptake and economics of hybrid rice. Treatments consisted of two hybrids in the main plot and seven levels of N management practices during Kharif 2000 and eight sub-plot treatments during Kharif 2001. Among the hybrids, PA6201 registered significantly higher grain yield of 7363 and 7555 kg ha-1 during Kharif 2000 and 2001 respectively with a yield advantage of 9.5% over CoRH2 in both the seasons. The N, P and K uptake at different growth stages revealed that rice hybrid PA 6201 was superior than CoRH2 in both the seasons. Application of green manure @ 6.25 t ha-1 in combination with N application based on LCC critical value 5 recorded significantly higher grain yield compared to other treatments in both the seasons. The N, P and K uptake in green manure @ 6.25 t ha-1 combined with LCC critical value 5 based N application (N4) was significant at all the stages, however it was comparable with 200 kg N ha-1 alone (N1) except at tillering stage. In both the years PA6201 hybrid recorded high net returns of 15.05 and 14.60% over CoRH2. Application of green manure @ 6.25 t ha-1 combined with LCC critical value 5 based N application (N4) recorded higher net returns and B:C ratio during both the years and it was followed by application of 200 kg N ha-1 alone (N1). Therefore, the rice hybrid PA6201 with application of green manure 6.25 t ha-1 combined with LCC critical value 5 based N applications significantly increased grain yield, nutrient uptake and in turn resulted in higher net return and B:C ratio.
  S. Ramesh and B. Chandrasekaran
  Field experiments were conducted at wetland research farm, Tamil Nadu Agricultural University, Coimbatore India during Kharif 2002 and 2003 with a view to formulate a suitable crop establishment method and to optimize the nitrogen management practices for hybrid rice ADTRH 1. The experiments were laid out in split plot design replicated thrice with four crop establishment techniques in the main plots and seven N management practices in the sub plots. The results revealed that different crop establishment methods exerted a significant variation on the seed rate requirement and caused significant influence on growth and yield of hybrid rice. Seeding through one out of two holes (M3) registered optimum seed rate of 28.03 and 27.59 kg ha-1 during 2002 and 2003, respectively. Except at the early stage of 40 DAS, there was no significant difference in plant height as influenced by establishment methods. Seeding through all the holes (M1) with higher seed rate recorded significantly higher values of growth characters viz., LAI, tillers m-2, DMP, productive tillers m-2 and grain yield which was comparable with transplanting (M1) and seeding through one out of two holes (M3). The influence of crop establishment methods on yield attributes like panicle length and 1000 grain weight were insignificant. The seeding through one out of three holes (M4) registered significantly higher total number of grains, filled grains panicle-1 and lower sterility percentage as compared to rest of the establishment methods. Application of N based on Soil Test Crop Response (STCR) enhanced significantly the growth and yield attributing characters viz., plant height, LAI, DMP, total tiller m-2, panicle length, productive tillers m-2, total number of grains panicle-1 over the other N management practices and was on par with N application in four splits combined with green manure Sesbania aculeata at the rate of 6.25 t ha-1 application. STCR based N application recorded the highest sterility percentage whereas LCC based N application noticed the lowest sterility percentage. The treatment combination of seeding through one out of two holes with a seed rate of 28 kg ha-1 and N application based on STCR (M3N7) during both the years realize the targeted yield.
  S. Ramesh and P. Ganesh Kumar
  A Mobile ad hoc Network (MANET) is a self-configuring infrastructure less network of mobile devices connected by wireless. These are a kind of wireless ad hoc Networks that usually has a routable networking environment on top of Link Layer ad hoc Network. The routing approach in MANET includes mainly three categories viz., Reactive Protocols, Proactive Protocols and Hybrid Protocols. These traditional routing schemes are not pertinent to the so called Intermittently Connected Mobile ad hoc Network (ICMANET). ICMANET is a form of Delay Tolerant Network, where there never exists a complete end-to-end path between two nodes wishing to communicate. The intermittent connectivity araise when a network is sparse or highly mobile. The study in general is carried out to get hold of a plain gen about the routing schemes possible in disconnected networks. It could aid to put together a proposal for a novel routing technique which is capable of holding the benefits and excluding the detriments of its prior existing techniques. Routing in such a spasmodic environ is arduous. An indication of prevailing routing approaches for ICMANET and their comparisons on different network parameters are portrayed in further discussions.
  S. Prakash , J. Lilly Mercy , K. Palanikumar , S. Ramesh , M.I. Rizwan Jamal and A. James Michael
  Medium Density Fiber board (MDF) panels are appropriate for many exterior and interior industrial applications. The degree of surface roughness of MDF plays an important role since, any surface irregularities will affect the final quality of the product. In the present study, regression model were developed to predict surface roughness in drilling MDF panels with carbide step drills. In the development of predictive models, drilling parameters of spindle speed, feed rate and drill diameter were considered as model variables. For this purpose, Taguchi’s design of experiments was carried out in order to collect surface roughness value. The Orthogonal Array (OA) and Analysis of Variance (ANOVA) are employed to study the surface roughness characteristics in drilling operation of MDF panels. The objective is to establish a correlation between spindle speed, feed rate and drill diameter with surface roughness in a MDF panel. The experiments are conducted as per Taguchi L27 orthogonal array with different cutting conditions. ANOVA and F-test were used to check the validity of regression model and to determine the significant parameter affecting the surface roughness. The statistical analysis showed that the feed rate was an utmost parameter on surface roughness. The microstructure of drilled surfaces were also studied by scanning electron microscopy (SEM).The SEM investigations reveled that drilling MDF panels with step drill produce surface striations and waviness which were increased significantly with feed rate.
  Mee Yoke Chong , Arshid Numan , YCY Evyan , WH Cheng , LS Wong , K. Ramesh and S. Ramesh
  Solution casting technique is used to prepare solid polymer electrolyte (SPE) utilizing biodegradable hydroxyethyl cellulose (HEC) as host polymer and magnesium trifluoromethanesulfonate (MgTf2) salt as charge carrier. However, the performance of the SPE is hindered by it's low ionic conductivity at room temperature. Thus, room temperature ionic liquid, 1-ethyl-3-methylimidazolium trifluoromethane sulfonate (EMIMTf) and tin (IV) oxide (SnO2) nanoparticles have been added into the SPE to overcome the shortcomings. As a result, the room temperature ionic conductivity improved to 9.28H10-5 and 2.84H10-4 S/cm upon addition of 40 wt.% EMIMTf ionic liquid and 2 wt.% of SnO2 nanoparticles, respectively. The conductivity-temperature plot shows that the transportation of ions in these films obey Arrhenius theory. The improvement of the ionic conductivity at room temperature for HSn2 makes it attractive for application to electrochemical devices.
  S. Ashokkumar , G. Rajaram , P. Manivasagan , S. Ramesh , P. Sampathkumar and P. Mayavu
  The present study was carried out to investigate the hydrographical parameters, nutrients, total coliforms and total heterotrophic bacteria populations in water and sediment samples of Mullipallam creek in Muthupettai mangroves. The range of hydrographical parameters in water samples viz., atmospheric temperature (28.5-32.2°C), surface water temperature (28.2-31.7°C), salinity (31-34‰), pH (8.0-8.3) and dissolved oxygen (2.95-3.52 mg-1) and in nutrients, inorganic phosphate (0.322-0.810 μmol-1), total phosphorus (1.312-3.239 μmol-1), nitrite (0.858 to 1.384 μmol-1), nitrate (1.937-5.133 μmol-1), silicate (16.272-21.237 μmol-1), ammonia (0.068-0.191 μmol-1) and total nitrogen (23.921-26.919 μmol-1) in water samples. The level of nutrients in the sediment samples, total nitrogen was varied from 3.70 to 8.96 μg-g, total phosphorus was ranged from 0.947 to 2.872 μg-g and total organic carbon was varied between 3.721 and 6.576 mg-g. The microbial population of present investigation was revealed that a total of nine bacterial coliforms were recorded, which includes of seven gram-negative forms such as Vibrio cholerae, V. parahaemolyticus, Escherichia coil, Klebsiella pneumonae, Shigella dysenteri, Streptococcus faecalis and Pseudomonas aeruginosa. The total of seven heterotrophic bacterial populations were recorded of which Vibrio sp. and Escherichia coli were from to be the dominant species followed by Shigella sp., Pseudomonas sp., Klebsiella sp., Salmonella sp. and Streptococcus sp.
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