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S. Selvi,E. Rajasekar 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.2
The tribological properties such as wear rate, hardness of the aluminum-fly ash composite synthesized by stir casting were investigatedby varying the weight % of fly ash from 5 to 20 with constant weight % of zinc and magnesium metal powder. A mathematical modelwas developed to predict the wear rate of aluminum metal matrix composites and the adequacy of the model was verified using analysisof variance. Scanning electron microscopy was used for the microstructure analysis which showed a uniform distribution of fly ash in themetal matrix. Energy - dispersive X-ray spectroscopy was used for the elemental analysis or chemical characterization of a sample. Theresults showed that addition of fly ash to aluminum based metal matrix improved both the mechanical and tribological properties of thecomposites. The fly ash particles improved the wear resistance of the metal matrix composites because the hardness of the samples takenincreased as the fly ash content was increased.
Multi-Area Unit Commitment with Bilateral Contract Approach in Deregulated Electricity Market
S.Chitra Selvi,R.P.Kumudini Devi,C.Christober Asir Rajan 대한전기학회 2009 Journal of Electrical Engineering & Technology Vol.4 No.3
The eventual goal of this paper is to help the generating companies and load-serving entities to choose appropriate relative levels of interconnected system versus bilateral trades while considering risk, and economic performance. In competitive power markets, electricity prices are determined by balance between demand and supply in electric power exchanges or bilateral contracts. The problem formulation is bilateral contract incorporated into Multi-area unit commitment with import/export and tie-line constraints. This proposed method considers maximizing own profit or minimize the operating cost among the generating companies in multi-area system. The feasibility of the proposed algorithm has been demonstrated using IEEE system with four areas and experimental results shows that proposed method is reliable, fast and computationally efficient
CONTROLLABILITY RESULTS FOR IMPULSIVE NEUTRAL EVOLUTION DIFFERENTIAL SYSTEMS
S.SELVI,M. MALLIKA ARJUNAN 한국산업응용수학회 2012 Journal of the Korean Society for Industrial and A Vol.16 No.2
In this paper, we consider the controllability of a certain class of impulsive neutral evolution differential equations in Banach spaces. Sufficient conditions for controllability are obtained by using the Hausdorff measure of noncompactness and Monch fixed point theorem under the assumption of noncompactness of the evolution system.
Multi-Area Unit Commitment with Bilateral Contract Approach in Deregulated Electricity Market
Selvi, S.Chitra,Devi, R.P.Kumudini,Rajan, C.Christober Asir The Korean Institute of Electrical Engineers 2009 Journal of Electrical Engineering & Technology Vol.4 No.3
The eventual goal of this paper is to help the generating companies and load-serving entities to choose appropriate relative levels of interconnected system versus bilateral trades while considering risk, and economic performance. In competitive power markets, electricity prices are determined by balance between demand and supply in electric power exchanges or bilateral contracts. The problem formulation is bilateral contract incorporated into Multi-area unit commitment with import/export and tie-line constraints. This proposed method considers maximizing own profit or minimize the operating cost among the generating companies in multi-area system. The feasibility of the proposed algorithm has been demonstrated using IEEE system with four areas and experimental results shows that proposed method is reliable, fast and computationally efficient
Metal oxide curcumin incorporated polymer patches for wound healing
R., Thamarai Selvi,A.P.S., Prasanna,R., Niranjan,M., Kaushik,T., Devasena,J., Kumar,Chelliah, Ramachandran,Oh, Deog-Hwan,S., Swaminathan,G., Devanand Venkatasubbu Elsevier 2018 APPLIED SURFACE SCIENCE - Vol.449 No.-
<P><B>Abstract</B></P> <P>Sodium alginate and Poly vinyl alcohol (PVA) based scaffolds are very well used for wound healing purpose. Sodium alginate is a natural polymer which is used for many biomedical applications. PVA is a biocompatible polymer used in many biomedical applications. Incorporation of Titanium dioxide (TiO<SUB>2</SUB>) nanoparticles in the scaffold increases the wound healing property of the scaffold. TiO<SUB>2</SUB> nanoparticles are biocompatible. They enhance the wound healing activity by photo catalytic property. Curcumin is used for the treatment of inflammation. It is the main active compound of turmeric Curcumin is used for treatment of wound and inflammation. It had antimicrobial and antioxidant property.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The work deals with the fabrication of patches for wound healing. </LI> <LI> Matal oxide nanoparticle is incorporated in the patch. </LI> <LI> Curcumin is incorporated in the patch. </LI> <LI> The patch surface is used for wound healing. </LI> <LI> Antibacterial and antifungal studies are done. </LI> </UL> </P>
Optimal Allocation of Distributed Generation Using Evolutionary Multi-objective Optimization
Pon Ragothama Priya P.,Baskar S.,Tamil Selvi S.,Babulal C. K. 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.2
This paper proposes a new long-term planning methodology for Multi-objective Distributed Generation Placement and Sizing (MO-DGPS) aiming at a minimum energy loss, CO2 emission, overall cost, besides enhancing the system voltage stability and reliability. The MO-DGPS problem has been reformulated to incorporate the uncertainties such as intermittent power generation of renewable DG (RDG), and forced outages of Distributed Generation (DG) units, the cost of reactive power imports from the substation with the conventional DGPS problem description. Moreover, the problem also considers time-varying loads, and load growth. The objective of the proposed modified problem formulation is to identify the optimal DG placement, sizing and the selling price of its generated power to the utility by minimizing the Distribution Companies cost and maximizing the DG Investor’s profits simultaneously, considering various constraints and uncertainties. A fast-elitist Non-dominated Sorting Genetic Algorithm-II has been employed to solve the reformulated MO-DGPS problem. The IEEE 33-Node and practical Tamil Nadu Electricity Board 84-Node radial distribution systems have been utilized as test systems in order to validate the proposed methodology. Performance analysis has been done on the results of a MO-DGPS problem for different combinations of RDG with conventional DG units. The results of these different scenarios have been compared with the results of recent research reports too. Among investigations of various scenarios, it is found that the right combination of biomass and conventional DG units provides better objective values and performance indices, minimum energy loss and CO2 emission.
Molecular Characterisation of the Mafriwal Dairy Cattle of Malaysia Using Microsatellite Markers
Selvi, P.K.,Panandam, J.M.,Yusoff , K.,Tan, S.G. Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.10
The Mafriwal dairy cattle was developed to meet the demands of the Malaysian dairy Industry. Although there are reports on its production and reproductive performance, there has been no work on its molecular characterization. This study was conducted to characterize the Mafriwal dairy cattle using microsatellite markers. Fifty two microsatellite loci were analysed for forty Mafriwal dairy cows kept at Institut Haiwan Kluang, Malaysia. The study showed two microsatellite loci to be monomorphic. Allele frequencies for the polymorphic loci ranged from 0.01 to 0.31. Genotype frequencies ranged from 0.03 to 0.33. The mean overall heterozygosity was 0.79. All polymorphic microsatellite loci deviated significantly (p<0.01) from Hardy-Weinberg equilibrium. The Mafriwal dairy cattle showed high genetic variability despite being a nucleus herd and artificial insemination being practiced.