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Suresh Vellaiyan,K. S. Amirthagadeswaran 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.3
The use of water-in-diesel emulsion fuel positively influences the performance and emission characteristics of diesel engines. The problem associated with the introduction of such fuel into existing diesel engines is the lack of favorable emulsion qualities, such as a high stability period, nominal heating value, medium density and low kinematic viscosity. The traditional Taguchi method has been applied to determine the optimal condition for single responses only; to overcome this limitation, the Taguchi-Grey relational-based multiresponse optimization method is adopted in the present study to obtain such beneficial emulsion fuel qualities. Experiments are conducted based on the L9 orthogonal array suggested in Taguchi’s quality concept, and the output responses are recorded. The emulsification process control parameters viz., surfactant concentration, stirrer speed and water concentration are identified as input parameters. Results show that all the process parameters significantly influence emulsion quality. An optimal parametric setting is determined according to S/N ratio and verified through confirmation experiments. This setting effectively improves emulsion quality. Furthermore, the properties of the W/D emulsion fuel prepared at the optimal parametric setting meet the diesel fuel requirements prescribed by the European standard of automotive fuel requirements (EN 590:2009).
G. Suresh,M. R. Ramesh,M. S. Srinath 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.8
This paper reports on a study of the high-temperature tribological performance of self-lubricating nickel-based compositeclad. A porous and crack free clad containing matrix, reinforcement, and lubricant phase is developed on titanium 31 alloyusing microwave irradiation. The microstructure of both NiCrSiB/WC and NiCrSiB/WC/Ag/BaF2 clad revealed very goodmetallurgical bonding with the substrate. The average microhardness of NiCrSiB/WC and NiCrSiB/WC/Ag/BaF2 clad is710.58 HV and 650.25 HV respectively, is comparatively higher than the titanium 31 substrate (320 HV). The addition of Agand BaF2solid lubricants in the clad endowing clad to operate at a broad temperature range. Compared with the NiCrSiB/WCclad, solid lubricant encapsulate clad has shown very low friction coefficient and wear rates. The sliding wear characteristicsof the clad were investigated by varying load and temperatures. The results revealed that oxide phases (NiO and Cr3O)andlubricant phases (Ag and BaWO4)formed at low and high temperatures are adequate to reduce delamination and material loss.
H M, Suresh-Kumar,R S, Kunabenchi,J S, Biradar,N N, Math,J S, Kadadevaramath Korean Society of Photoscience 2003 Journal of Photosciences Vol.10 No.3
The fluorescence quenching of 5-methyl-3-phenyl-2-[s-oxadiazol-2'-thionen5'-yl] indole by carbon tetrachloride ($CCl_4$) and aniline in different solvents viz., dioxane, benzene, toluene, methanol, propanol has been carried out at room temperature to understand the role of quenching mechanisms. The Stern-Volmer plots have been found to be linear. As probability of quenching per encounter 'p' is less than unity, and the activation energy for quenching 'E$_{a}$' is greater than the activation energy of diffusion 'E$_{d}$', it is inferred that the fluorescence of quenching mechanism is not due to material diffusion alone.e.e.
Yuvakkumar, R.,Suresh, J.,Nathanael, A.J.,Sundrarajan, M.,Hong, S.I. Elsevier 2014 Materials Science and Engineering C Vol.41 No.-
In the present investigation, we report a sustainable novel green synthetic strategy to synthesis zinc oxide nanocrystals. This is the first report on sustainable biosynthesis of zinc oxide nanocrystals employing Nephelium lappaceum L., peel extract as a natural ligation agent. Green synthesis of zinc oxide nanocrystals was carried out via zinc-ellagate complex formation using rambutan peel wastes. The successful formation of zinc oxide nanocrystals was confirmed employing standard characterisation studies. A possible mechanism for the formation of ZnO nanocrystals with rambutan peel extract was also proposed. The prepared ZnO nanocrystals were coated on the cotton fabric and their antibacterial activity were analyzed. ZnO nanocrystals coated cotton showed good antibacterial activity towards Escherichia coli (E. coli), gram negative bacteria and Staphylococcus aureus (S. aureus), gram positive bacteria.
Scheduling in compute cloud with multiple data banks using divisible load paradigm
Suresh, S.,Hao Huang,Kim, H. J. IEEE 2015 IEEE transactions on aerospace and electronic syst Vol.51 No.2
<P>The main challenge in a compute cloud system is to design a scheduling strategy for heterogeneous computing resources with shared data banks. The cloud user's job arrives at the Web role, which distributes the load to the worker rules for concurrent processing. The worker role retrieves the respective data from the shared data banks. According to divisible load theory, the scheduling problem is formulated as relevant recursive equations and constraints that are derived from the continuity of processing time due to retrieval from multiple data banks. The scheduling problem in a compute cloud is formulated as a linear programming problem. Finally, we present a satellite image classification problem in a compute cloud as an example to show the adequacy of the proposed solution.</P>
S. Sonia,R. Jayasudha,Naidu Dhanpal Jayram,P. Suresh Kumar,D. Mangalaraj,S.R. Prabagaran 한국물리학회 2016 Current Applied Physics Vol.16 No.8
Hierarchical cupric oxide (CuO) nanostructures (such as nanoflowers, nanorods, nanoleaves and nanoflakes) were synthesized by low temperature sonochemical method and studied its biocompatible and antibacterial functionality. The antibacterial activity of CuO nanostructures in three different concentrations (12.5 mg/ml, 25 mg/ml and 50 mg/ml) have been studied through agar diffusion method against four pathogenic bacteria viz., Staphylococcus aureus, Streptococcus pneumoniae, Salmonella typhimurium, and Serratia marcescens. Nanoflowers exhibited more antibacterial activity than nanorods, nanoleaves and nanoflakes, which may be of high specific surface area of nanoflowers (58.63 m2/g). The minimum inhibitory concentration (MIC) for all the compounds is 12.5 mg/ml and showed the maximum zone of inhibition (43 ± 0.5 mm) at 50 mg/ml concentration. Hence our study strongly proved that the synthesized CuO nanostructures can act as excellent antibacterial agents towards human pathogens.
S.Manimaran,S.Themozhi,M.J.Nanjan,B. Suresh 한국생약학회 2007 Natural Product Sciences Vol.13 No.4
aim of the present study was to investigate the various chemical components present in the conevolatile oil of Cupresus macrocarpa and also determine its antimicrobial activity. Totally 13 compounds wereidentified with 99.99% by GC-MS analysis. The major compounds identified were terpinene-4-ol (19.42%),dinopol (15.63%), α-pinene (13.58%), and β-pinene (12.16%). The antimicrobial activity was carried out for theorganisms used were Bacillus subtilis, Staphylococcus aureus, Bacillus megaterium, and Bacillus cogulans. Thegram negative organisms used were Escherichia coli, Kleibseilla pneumonia, Pseudomonas aeruginosa andSalmonella typhi. In vitro antifungal studies were also carried out by using organisms, Candida albicans,Aspergillus flavus, Trichoderma lignorum and Cryptococcus neoformans. The standard drugs used were penicillinbacteria and fungi respectively. Both oil and cream formulation showed good activity against fungi than bacteria.This study is being reported for the first time on cone volatile oil of this plant. KeywordsVolatile oil, antimicrobial, terpinene-4-ol, dinopol, α and β-pinene, Cupressus macrocarpa.