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Kumar, S. Rajesh,Kim, Jong Guk,Viswanathan, C.,Kim, Won Bae,Selvan, R. Kalai,Ponpandian, N. Elsevier 2018 Materials research bulletin Vol.97 No.-
<P><B>Abstract</B></P> <P>One-pot solvothermal process is adopted to develop, 3D hierarchical Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles supported 2D reduced graphene oxide sheets (Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO) as possible negative electrodes for lithium ion batteries. The synthesis parameters are optimized to prepare agglomeration-free Fe<SUB>3</SUB>O<SUB>4</SUB> nanostructures with uniform size and shape on r-GO. The field emission scanning electron microscopic (FESEM) image reveals that the 3D hierarchical Fe<SUB>3</SUB>O<SUB>4</SUB> nanostructures are uniformly decorated on r-GO. The physicochemical and functional properties of Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO are systematically investigated using various techniques. The fabricated Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO electrode delivers an initial discharge capacity of 1221mAhg<SUP>−1</SUP> at a current density of 100mAg<SUP>−1</SUP> and retains the specific capacity of 1560mAhg<SUP>−1</SUP> after 100 cycles. Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO significantly enhances cyclic performance, when compared with bare Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles due to the uniform distribution of Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles on the graphene sheet with the more number of electrochemically active sites.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Monodispersed Fe<SUB>3</SUB>O<SUB>4</SUB> nanostructures with different shapes synthesized by solvothermal method. </LI> <LI> The fabricated Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO electrode delivers an initial discharge capacity of 1221mAhg<SUP>−1</SUP> at 100mAhg<SUP>−1</SUP>. </LI> <LI> Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO significantly enhances the cyclic stability and rate capability than bare Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
R. Anandan,K.H. Sabeena Farvin,S. Hari Senthil Kumar,K.S. Shiny,Suseela Mathew,T.V. Sankar,P.G. Viswanathan Nair 한국식품영양과학회 2006 Journal of medicinal food Vol.9 No.4
We studied the cardioprotective effect of squalene on isoprenaline-induced myocardial infarction in male al-bino rats with respect to changes in the levels of lipid components in plasma and heart tissue. Prior administration of 2% squa-lene in feed for 45 days significantly reduced the isoprenaline-induced elevation in the levels of cholesterol, triglycerides, andfree fatty acids in plasma and heart tissue of rats following myocardial infarction. It exerted an anitlipidemic effect by re-ducing the level of low-density lipoprotein cholesterol with a parallel rise in the level of high-density lipoprotein cholesterolin plasma of experimental rats. A tendency to prevent the isoprenaline-induced depletion of phospholipids in the myocardiumof experimental rats was also observed. In the present study, the pretreatment with squalene significantly counteracted the iso-prenaline-induced lipid peroxidation and maintained the rats at near normal status. The results of the present study indicatethat the overall cardioprotective effect of squalene is probably related to an inhibition of lipid accumulation by its hypolipi-demic properties and/or its antioxidant properties.
Incorporating Security Requirements Engineering into Standard Lifecycle Processes
Nancy R. Mead,Venkatesh Viswanathan,Justin Zhan 보안공학연구지원센터 2008 International Journal of Security and Its Applicat Vol.2 No.4
This paper gives an overview of various standard lifecycle development processes. It then provides a roadmap for developing security-critical projects using Rational Unified Process as a framework for development. The Security Quality Requirements Engineering (SQUARE) methodology provides a way to address security issues early in the development lifecycle. SQUARE can be more effective when it fits into an organization’s existing development process. Hence this paper describes a way to fit the SQUARE methodology into the Rational Unified Process.
N. Ravikumar,R. Vijayan,R. Viswanathan 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.1
This research work includes an extensive experimental analysis to explore the significance of cryogenic treated (CT) anduntreated (UT) carbide cutting inserts on the machinability of AZ91D Mg alloy. A Taguchi L18 orthogonal array is employedto gather data for the analysis. Grey relational analysis (GRA) with both, equal weight (EqW) method along with entropybased weight method (EWM) are utilized to optimize the parameters of performance measures viz. surface roughness (Ra),cutting-tool temperature (T), cutting-force (Fz) and tool-wear (VB). CT cutting inserts yield better results than untreated one. The GRA results provided the optimal parameter combination for both types of weight-allocation methods as 80 m/min cuttingspeed, 0.5 mm depth of cut, 0.1 mm/rev feed for CT cutting insert. Confirmation test evidenced that, Ra, Fz, T and VB valuesare considerably reduced by 20%, 12%, 10% and 46% respectively while machining with cryogenic treated tool (CTT).
A. Srinivasan,R. Prabu,S. Ramesh,R. Viswanathan 한양대학교 청정에너지연구소 2022 Journal of Ceramic Processing Research Vol.23 No.6
Aluminum alloy are widely adopted material for engineering applications in automobile, aircraft and marine industries. Itshigh strength to weight ratio attracts modern industry to extend its applications in various domains. For producing variouscomponents, turning is the most reputed machining operation. The method of manufacturing directly impacts the productaccuracy. The present research deals with fabrication and optimization study in dry turning of LM25 Aluminium MetalMatrix Composites (AMMCs). For AMMC fabrication, 10 wt.% of micro and nano Al2O3 ceramic particle is added asreinforcement. Hybrid Grey Relational Analysis (GRA) coupled Principal Component Analysis (PCA) technique is suggestedfor finding optimization results. Experiment was conducted with cutting speed (V), feed rate (f), and depth of cut(d) as inputparameters. Based on optimization, feed rate dominates the entire turning process compared to cutting speed and depth of cutand 12.95% improvement of GRA was achieved at the end of confirmation experiment.
Three dimensional electro catalytic oxidation of aniline by boron doped mesoporous activated carbon
S. Karthikeyan,K. Viswanathan,R. Boopathy,P. Maharaja,G. Sekaran 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
In this report, boron doped mesoporous activated carbon (B-MAC) was synthesized by directhydrothermal route. The prepared B-MAC was characterized for HR-TEM, wide-angle XRD, SEM, XPS,FTIR and N2 sorption analyses. The results suggested that the B-MAC is mesoporous in structure andamorphous in nature, with surface area of 3.036 m2 g 1. The B-MAC was chosen as a catalyst for theelectrochemical oxidation of synthetic aniline solution. For the oxidations process, graphite rod waschosen as anode; SS 316 was chosen as cathode in the electrochemical catalytic oxidation process. Theelectro chemical oxidation of aqueous aniline solution was confirmed through UV–visible spectroscopy,Florescence emission spectrum and cyclic voltammetry analyses. The results revealed that, the removalefficiency of COD and aniline by B-MAC was found to be 76–80% and 80–85%, respectively, in electrocatalytic oxidation. MAC fluidized electro catalytic oxidation system removed COD by 40–45% andaniline by 50–62%, respectively. Thus, the B-MAC catalyst was found to be viable for the electrochemicaltreatment of aniline containing waste water.