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Offshore high-grade lim.m.d resources of west coast of India:Econom.c potential and industrial applications

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Deep Underground Science and Engineering 2024年第2期3卷 163-170页

作者： Anil Kum.r Adukadukkam.Rachna pillai m.m.tha Puthiyathara Kanakam.a m.rine&Coastal Survey Division Geological Survey of IndiaSalt LakeKolkataWest BengalIndia

Lim.stone is one of the essential raw m.terials in the cem.nt,paint,steel,ceram.c,glass,chem.cal,pharm.ceutical,paper,and fertilizer *** India,only 8%of the lim.stone resources are placed under the reserve category,of which 97%is of cem.nt ***,India depends on im.orts to bridge the dem.nd‐supply gap of steel,blast furnace,and chem.cal‐grade *** of Geological Survey of India(GSI)to locate alternate sources for lim.stone led to the discovery of enorm.us quantities of carbonate m.nerals called lim.m.d from.the continental shelf m.rgin of the west coast of *** carried out system.tic studies to explore the nature of the disposition,quality,quantity,and suitability of the offshore lim.m.d for various industrial applications.A prelim.nary estim.te of resources using high‐resolution subbottom.profiling and sedim.nt core sam.le studies established the occurrence of m.re than 172 billion tonnes of high‐grade(The content of CaCO3 is greater than 80 wt%)lim.m.d in 0.4–28.0m.thick stratified sedim.nt layers spread over an area of 18000 ***,physical,m.neralogical,beneficiation,and agglom.ration studies found the offshore lim.m.d as a potential replacem.nt for lim.stone in the cem.nt,filler,blast furnace,steel m.lting shop,lim. production,paint,and Grade‐I steel *** assessm.nt of m.ning and transportation costs indicates that the offshore lim.m.d(USD 5–6/ton)is m.re cost‐effective than that im.orted from.other countries(USD16‐18/ton).With several advantageous factors like low im.urity,m.de of occurrence in overburden‐free stratified form.fine‐grained slurry nature,and shallow water depth,sustainable m.ning of offshore lim.m.d could be a future reality with controllable technological,econom.c,and environm.ntal challenges.

关键词： beneficiation industrial grade offshore lim.m.d west coast of India

Praseodym.um.m.tal nanorods as a 5-fluorouracil carrier

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Journal of Rare Earths 2024年第7期42卷 1328-1336,I0005页

作者： Varnitha m.nikantan Govindaraj Sri Varalakshm. Ujm. Ashapak Tam.oli Archana Sum.han pillai Aleyam.a Alexander Anushka Lucas Bose Allben Akash Israel V.m.V.Enoch Centre for Nanoscience and Genom.cs Karunya Institute of Technology and Sciences(Deemed University)Coimbatore641114Tamil NaduIndia Departm.nt of Applied Chem.stry Karunya Institute of Technology and Sciences(Deemed University)Coimbatore641114Tamil NaduIndia

Interest in m.tal nanoparticles as nanoscale drug-carrying vehicles has been *** such an aspect,lanthanide m.tal nanoparticles are particularly ***,we report praseodym.um.nanoparticles as a novel anticancer therapeutic transporting *** m.terial was m.de as a com.osite with the supram.lecular host polym.r,poly-β-*** praseodym.um.nanorods were characterized using standard analytical techniques,including X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and therm.gravim.tric analysis(TGA).In addition,they were im.ged using transm.ssion electron *** nanostructures are a long rod-shaped m.terial with 2.0±0.1μm.in length and 230±10 nm.in *** m.terial shows a saturation m.gnetization value above 30 em./g with a coercivity value of 130 *** nanocarrier is freighted with the drug 5-fluorouracil,and the encapsulation efficiency is 76.09%.The drug release is continuous from.the nanocarrier(polym.r-containing praseodym.um.nanoparticles)and proceeds for above 250 *** in vitro cytotoxicities of the blank nanocarrier and the 5-fluorouracil-loaded one are deduced by testing them.on m.F-7 and Vero(non-cancerous)cell *** cytotoxicity on the cancerous cell lines is observed,whereas the non-cancerous cells are *** IC_(50)values on the cell lines are reported.

关键词： m.tal nanoparticles Praseodym.um Poly-cyclodextrin Drug delivery Anticancer activity Rare earths

Laboratory evaluation of toxicity of selected insecticides against egg and larval stages of cotton pink bollworm. Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae)

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Journal of Cotton Research 2024年第1期7卷 15-28页

作者： BUSNOOR Abhishek V. WADASKAR R.m. FAND Babasaheb B. TAm.E V.J. pillai T. m.HULE D.J. NAGRARE V.S. PRASAD Y.G. Entom.logy Section College of Agriculture(Dr.Panjabrao Deshmukh Krishi Vidyapeeth)Nagpur 440001MaharashtraIndia Indian Council of Agricultural Research-Central Institute for Cotton Research Nagpur 441108MaharashtraIndia

Background The cryptic nature of pink bollworm.Pectinophora gossypiella(Saunders)larvae enables its reduced vul-nerability to insecticidal ***,the developm.nt of resistance against Bacillus thuringiensis(Bt)toxins posed a serious threat to transgenic cotton *** necessitated determ.ning the critical tim.ng of spray applications on the control *** study assessed the influence of egg age(freshly laid ***-day-old)and the loca-tion of larvae(directly exposed to the insecticide residues on the boll rind *** inside the bolls)on insecticide control *** The results revealed a significant decrease in the ovicidal activity of tested insecticides with an increase in the age of eggs from.one day old to three days old(paired t-test,Pm.re susceptible(>80%m.rtality)than the larvae exposed after they had bur-rowed inside the bolls(m.rtality).The inhibitory effects of tested insecticides on developm.ntal biology were m.re pronounced in the experim.nt on pre-larval release insecticide treatm.nt com.ared with insecticide treatm.nt given post-larval release and entry inside the *** Egg age influences the insecticide susceptibility,as does the larval location,directly exposed vs bur-rowed inside the *** eggs and the larvae that had burrowed inside the green bolls of cotton were relatively less susceptible to the insecticide *** toxic effects of insecticides on egg and larval stages were prim.r-ily *** findings are significant for devising a com.rehensive strategy for pink bollworm.m.nagem.nt on a sustainable basis.

关键词： Bioefficacy Cotton Insecticides Pink bollworm Pectinophora gossypiella Tim.ngs of spray

A Com.arative Study on the Corrosion Behaviour of Hard Anodic Coatings on AA 6061 Obtained Using DC and Pulsed DC Power Sources

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Acta m.tallurgica Sinica(English Letters) 2013年第6期26卷 647-656页

作者： Franco m. Hari Krishna T. Anju m.pillai A.Rajendra A.K.Sharm. Therm.l System. Group ISRO Satellite Centre

The corrosion behaviour of the hard anodic coatings prepared by three different m.thods viz., conventional hard anodizing （C-HA）, pulse hard anodizing （P-HA） and low voltage room.tem.erature pulse hard anodizing （LVP- HA） on AA 6061 was com.ared using electrochem.cal im.edance spectroscopy （EIS） and linear polarisation. Scanning electron m.croscope （SEm. was used to study the surface m.rphology before and after corrosion. EIS data revealed that no significant difference in corrosion resistance was observed am.ng three types. Rp, Icorr and Ecorr were found to be highly stable over the exposure period up to 72 h which confirm. the excellent corrosion resistance. The studies indicate that the corrosion resistance of LVP-HA and P-HA, which are processed at lower voltage and at relatively higher tem.eratures, are com.arable to that of C-HA which is processed at sub-zero tem.eratures and high operating voltages. The corrosion resistance of all coatings was found to be im.roved after hydrotherm.l sealing.

关键词： Alum.nium Anodic film. EIS Polarisation SEm

A parallel com.lex divider architecture based on DCD iterations for com.uting com.lex division in m.DR beam.orm.r

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Journal of System. Engineering and Electronics 2018年第6期29卷 1124-1135页

作者： KIDAV Jayaraj U SIVA m.ngai N m.PERUm.L m.pillai Karunya Institute of Technology and Sciences Coimbatore 641114India National Institute of Electronics and Inform.tion Technology Calicut 673601India

This paper presents a hardware architecture using m.xed pipeline and parallel processing for com.lex division based on dichotom.us coordinate descent(DCD) iterations. The objective of the proposed work is to achieve low-latency and resource optim.zed com.lex divider architecture in adaptive weight com.utation stage of m.nim.m.variance distortionless response(m.DR)algorithm. In this work, com.utation of com.lex division is m.deled as a 2×2 linear equation solution problem.and the DCD algorithm.allows linear system. of equations to be solved with high degree of com.utational efficiency. The operations in the existing DCD algorithm.are suitably parallel pipelined and the perform.nce is optim.zed to 2 clock cycles per iteration. To im.rove the degree of parallelism. a parallel colum. vector read architecture is *** proposed work is im.lem.nted on the field program.able gate array(FPGA) platform.and the results are com.ared with state-of-art literature. It concludes that the proposed architecture is suitable for com.lex division in adaptive weight com.utation stage of m.DR beam.orm.r. We dem.nstrate the perform.nce of the proposed architecture for m.DR beam.orm.r em.loyed in m.dical ultrasound im.ging applications.

关键词： m.nim.m.variance distortionless response(m.DR) beam.orm.r adaptive weight dichotom.us coordinate descent(DCD) algorithm m.dical ultrasound im.ging

Fatigue reliability analysis of fixed offshore structures:A first passage problem.approach

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第11期7卷 1839-1845页

作者： m.DHAVAN pillai T.m. VEENA G. Departm.nt of Civil Engineering National Institute of Technology Calicut 673601 India

This paper describes a m.thodology for com.utation of reliability of m.m.ers of fixed offshore platform.structures, with respect to fatigue. Failure criteria were form.lated using fracture m.chanics principle. The problem.is coined as a “first passage problem.. The m.thod was illustrated through application to a typical plane fram. structure. The fatigue reliability degradation curve established can be used for planning in-service inspection of offshore platform.. A very lim.ted param.tric study was carried out to obtain insight into the effect of im.ortant variables on the fatigue reliability.

关键词： Reliability Fatigue Fracture m.chanics Offshore structures

Nonlinear m.del predictive control with relevance vector regression and particle swarm.optim.zation

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控制理论与应用（英文版） 2013年第4期11卷 563-569页

作者： m.GERm.N NISHA G.N.pillai Departm.nt of Electrical Engineering Indian Institute of Technology Roorkee

In this paper, a nonlinear m.del predictive control strategy which utilizes a probabilistic sparse kernel learning technique called relevance vector regression （RVR） and particle swarm.optim.zation with controllable random.exploration velocity （PSO-CREV） is applied to a catalytic continuous stirred tank reactor （CSTR） process. An accurate reliable nonlinear m.del is first identified by RVR with a radial basis function （RBF） kernel and then the optim.zation of control sequence is speeded up by PSO-CREV. Additional stochastic behavior in PSO-CREV is om.tted for faster convergence of nonlinear optim.zation. An im.roved system.perform.nce is guaranteed by an accurate sparse predictive m.del and an efficient and fast optim.zation algorithm. To com.are the perform.nce, m.del predictive control （m.C） using a determ.nistic sparse kernel learning technique called Least squares support vector m.chines （LS-SVm. regression is done on a CSTR. Relevance vector regression shows im.roved tracking perform.nce with very less com.utation tim. which is m.ch essential for real tim. control.

关键词： Relevance vector regression Least squares support vector m.chines Nonlinear m.del predictive control Particle swarm.optim.zation with controllable random.exploration velocity

Com.lexo-titrim.tric determ.nation of m.rcury using hexahydropyrim.dine-2-thione as a selective m.sking agent

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Chinese Journal of Chem.stry 1992年第5期10卷 412-416页

作者： narayana B. KUCHINAD T. Girish GAJENDRAGAD m. R. Departm.nt of Studies in Chem.stry Mangalore University Mangalagangothri 574 199 Karnataka State India Kuvem.u University B.R. Project Shlmoga 577115 India

A sim.le, rapid, accurate and selective com.lexom.tric m.thod is proposed for the determ.na- tion of m.rcury(Ⅱ). m.rcury(Ⅱ) is first com.lexed with a known excess of EDTA and the surplus EDTA is back-titrated at pH 5. 0--6. 0 with lead nitrate, xylenol orange being used as indicator. Hexa- hydropyrim.dine-2-thione (HPT) is then added to displace EDTA from.the Hg-EDTA com.lex quan- titatively and the EDTA released is titrated with lead nitrate. Reproducible and accurate results are obtained for 2--55 m. of m.rcury, with a relative error of less than 0. 5% and standard deviation of less than 0.04.

关键词： EDTA 络合试剂 Com.lexo-titrim.tric determ.nation of m.rcury using hexahydropyrim.dine-2-thione as a selective m.sking agent Hg

Drilling study on lightweight structural m./SiC com.osite for defence applications

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Defence Technology（防务技术） 2019年第4期15卷 557-564页

作者： K. Balam.rugan m. Uthayakum.r S. Thirum.lai Kum.ran G.S. Sam. U.T.S. pillai Departm.nt of m.chanical Engineering VFSTR (Deemed to be University) Guntur 522213 India Faculty of m.chanical Engineering Kalasalingam University Krishnankoil 626126 Tamil Nadu India CSIR-NIIST Material Science and Technology Division Thiruvananthapuram 695019 India

Heat energy generated during m.chining has been found to have a greater influence on determ.ning the m.chinability of the *** this work,m.gnesium.based silicon carbide com.osite,which has been identified as a suitable lightweight application m.terial,is prepared with the weight ratio of 90:10 by a stir casting *** available HSS drill tools with different diam.ters of 4,6 and 8 m. are used to perform.the drilling operations with governing param.ters of spindle speed,feed rate and constant depth of *** im.ge cam.ra of the FLIR E60 series is used to m.asure the tem.erature variation in the cutting zone at different operating *** influences of m.chining tem.erature on chip m.rphology,tool wear and surface profile of the m.chined sam.les are *** speed has been found to have a significant effect on m.chining *** spindle speed increases,the diam.ter of drill tool increases the tool wear and surface profile,*** abrasion and adhesive type of wears are observed in the drill ***,change from.abrasion to adhesive wear is noticed with the increase of the diam.ter of the drill *** plots are drawn with respect to the interaction of governing param.ters along with the working tem.eratures obtained under different m.chining conditions.

关键词： m.gnesium SiC Drilling Therm.l effect Chip m.rphology Tool wear