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A nuetrosophic single acceptance sampling plan with quality parameters
S. Jayalakshmi,M. Gopinath 한국전산응용수학회 2024 Journal of applied mathematics & informatics Vol.42 No.1
In the Quality Control and inspection processes, the use of attribute sampling strategies is crucial. In this study, we incorporate the neutrosophic fuzzy acceptance sampling plan method to present a fresh approach to attribute sampling plans. Utilizing the benefits of neutrosophic fuzzy sets, the proposed sampling plan method models and assesses the acceptance standards for attribute sampling. We compare the suggested method to already-in-use attribute sampling techniques plans with new attribute six sigma sampling techniques plan is proposed in order to verified its efficacy. The outcomes show the neutrosophic fuzzy acceptance sampling plan's superiority in terms of its capacity to manage uncertainties, account for ambiguity, and produce more precise quality evaluation outputs.
Studies on hydrogen embrittlement in Zr- and Ni-based amorphous alloys
Jayalakshmi, S.,Park, S.O.,Kim, K.B.,Fleury, E.,Kim, D.H. Elsevier 2007 Materials science & engineering. properties, micro Vol.449 No.-
<P><B>Abstract</B></P><P>Mechanical and structural properties of Zr<SUB>50</SUB>Ni<SUB>27</SUB>Ni<SUB>18</SUB>Co<SUB>5</SUB> (at.%) and Ni<SUB>59</SUB>Zr<SUB>16</SUB>Ti<SUB>13</SUB>Nb<SUB>7</SUB>Sn<SUB>3</SUB>Si<SUB>2</SUB> (at.%) amorphous alloys were studied before and after hydrogenation. In both alloys, upon hydrogenation, a significant reduction in mechanical properties was evident. The occurrence of hydrogen embrittlement was supported by fracture morphology and is further explained based on the corresponding structural changes induced by hydrogenation.</P>
Thermal Stability and Mechanical Properties of Hydrogenated Zr-Ni-Nb-Co Amorphous Alloy
Jayalakshmi, S.,Fleury, Eric,Kim, Yu Chan,Kim, Ki Bae Trans Tech Publications, Ltd. 2005 Materials science forum Vol.486 No.-
<P>Zr50Ni27Nb18Co5 amorphous ribbons were hydrogenated using an electrochemical method. Under a current density of 30 mA/cm2, the thermal stability of the amorphous phase was found to increase with the charging time. Hardness and fracture strength were found to be independent of charging time, indicating that the Zr-Ni-Nb-Co amorphous alloys preserved its mechanical integrity.</P>
S. Md. AKBAR,S. K. JAYALAKSHMI,H. C. SHARMA,K. SREERAMULU 한국곤충학회 2011 Entomological Research Vol.41 No.6
Dihydrolipoamide dehydrogenase (DHLDH) was isolated from the mitochondria of Helicoverpa armigera, a destructive pest which has developed resistance to commonly used insecticides. The flavoenzyme was purified 17.98-fold to homogeneity with an overall yield of 10.53% by employing ammonium sulfate precipitation, hydroxylapatite chromatography and CM-Sephadex chromatography. The purified enzyme exhibited the specific activity of 18.7 U/mg and was characterized as a dimer with a subunit mass of 66 kDa. The enzyme showed specificity for nicotinamide adenine dinucleotide – hydrogen (NADH) and lipoamide, as substrates, with Michaelis-Menten constants (K_m) of 0.083 mmol/L and 0.4 mmol/L, respectively. The reduction reaction of lipoamide by the enzyme could be explained by ping-pong mechanism. The spectra of DHLDH showed the maximum absorbance at 420 nm, 455 nm and 475 nm. The enzyme activity was strongly inhibited by mercurial and arsenical compounds. The N-terminal sequence of Ha-DHLDH showed homology with those of mammalian and arthropod DHLDH. Since H. armigera has developed high levels of resistance to commonly used insecticides, biochemical properties of the metabolic enzymes such as DHLDH, could be helpful to develop insecticidal molecules for the control of H. armigera, with a different mode of action.
High Temperature Mechanical Properties of Rapidly Quenched Zr50Ni27Nb18Co5 Amorphous Alloy
S. Jayalakshmi,에릭플러리 대한금속·재료학회 2009 METALS AND MATERIALS International Vol.15 No.5
The high temperature mechanical properties of Zr50Ni27Nb18Co5 amorphous ribbons, proposed as metallic membrane material for hydrogen purification are presented. The mechanical behavior of the amorphous alloy, which generally does not exhibit a super-cooled liquid region, can be categorized into varying temperature regimes. A strain rate dependent phenomenon was observed between 425 °C < T < 490 °C in the strain rate range of 10−6 s−1 to 10−2 s−1 . However, the alloy did not exhibit Newtonian-flow characteristics at the varied test temperature and strain rate range employed in this study. Detailed analyses indicated that in these temperature regimes structural changes occur, resulting in the formation of nanocrystalline phases. The results from these mechanical tests corroborated with the microstructural changes that occurred at these temperatures/ strain rates. The high temperature mechanical properties of Zr50Ni27Nb18Co5 amorphous ribbons, proposed as metallic membrane material for hydrogen purification are presented. The mechanical behavior of the amorphous alloy, which generally does not exhibit a super-cooled liquid region, can be categorized into varying temperature regimes. A strain rate dependent phenomenon was observed between 425 °C < T < 490 °C in the strain rate range of 10−6 s−1 to 10−2 s−1 . However, the alloy did not exhibit Newtonian-flow characteristics at the varied test temperature and strain rate range employed in this study. Detailed analyses indicated that in these temperature regimes structural changes occur, resulting in the formation of nanocrystalline phases. The results from these mechanical tests corroborated with the microstructural changes that occurred at these temperatures/ strain rates.
A. Jayalakshmi,D. Mohan,S. Rajesh,S. Senthilkumar,H.S. Hari Sankar 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.1
Methacrylamide was grafted on to poly (isophthalamide) (PIPA-g-MAA) to improve its solubility andhydrophilicity. Then, PIPA-g-MAA incorporated high performance cellulose acetate ultrafiltration (CA)membranes were prepared by phase inversion technique and physical properties of the membraneswere studied by various analytical methods. The efficiency of these membranes in the removal of arsenicfrom aqueous stream was studied and an effort has been taken to correlate the separation efficiency withmorphology. Overall results suggest that membrane hydrophilicity, structure and performance wereimproved significantly by the addition of PIPA-g-MAA. Thus PIPA-g-MAA can be considered as aneffective modification agent for CA membranes.
N. S. Jayalakshmi,K. M. Bhargavi 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.1
This paper presents a plug-in electric vehicle (PEV) charging unit supplied by PV, wind and the battery in an autonomous mode of DC microgrid (MG) system. With the traditional control methods of PEV, the EV is charged without considering generation and the load limits. The control strategy proposed for PEV in this article is to increase the maximum rate of charging capacity of an EV only if generation exceeds the load demand using new current-loop control technique. The variation of photovoltaic irradiance, DC and AC loads, battery charging and discharging characteristics are considered which are directly coupled to a medium voltage DC bus. This tends to be an attractive option for increasing the efficiency and operation of electric vehicle charging station. The power reference based droop controller is designed for the battery to provide an efficient power management of a DC MG system by regulating the DC link voltage with less deviation. The effectiveness of the proposed MG system with Escape Ford EV vehicle has been validated by MATLAB/Simulink. The reported simulation results show that the approach presented is capable of governing the PEV charging unit and regulation of DC bus voltage.
Probing of Potential Luminous Bacteria in Bay of Bengal and Its Enzyme Characterization
( Senthil S Balan ),( S M Raffi ),( S Jayalakshmi ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.6
The present study dealt with the isolation, identification and enzyme characterization of potential luminous bacteria from water, sediment, squid, and cuttle fish samples of the Karaikal coast, Bay of Bengal, India during the study period September 2007 - August 2008. Bioluminescent strains were screened in SWC agar and identified using bi℃hemical tests. As Shewanella henadai was found to be the most common and abundant species with maximum light emission [69,702,240 photons per second (pps)], the optimum ranges of various physic℃hemical parameters that enhance the luciferase activity in Shewanella hanedai were worked out. The maximum luciferase activity was observed at the temperature of 25℃ (69,674,387 pps), pH of 8.0 (70,523,671 pps), salinity of 20 ppt (71,674,387 pps), incubation period of 16 h (69,895,714 pps), 4% peptone (70,895,152 pps) as nitrogen source, 0.9% glycerol (71,625,196 pps), and the ionic supplements of 0.3% CaCO3 (73,991,591 pps), 0.3% K2HPO4 (73,919,915 pps), and 0.2% MgSO4 (72,161,155 pps). Shewanella hanedai was cultured at optimum ranges for luciferase enzyme characterization. From the centrifuged supernatant, the proteins were precipitated with 60% ammonium sulfate, dialyzed, and purified using anionexchange chromatography, and then luciferase was eluted with 500 mM phosphate of pH 7.0. The purified luciferase enzyme was subjected to SDS-PAGE and the molecular mass was determined as 78 kDa.