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Enhanced cavitation erosion resistance of a friction stir processed high entropy alloy

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International Journal of Minerals,Metallurgy and Materials 2020年第10期27卷 1353-1362页

作者： Rakesh b.nair H.S.Arora Harpreet Singh Grewal Surface Science and Trib.logy Lab Department of Mechanical EngineeringShiv Nadar UniversityGautam Buddha NagarUttar Pradesh 203207India

Friction stir processing of an Al0.1CoCrFeNi high entropy alloy(HEA)was performed at controlled cooling conditions(amb.ent and liquid sub.erged).Microstructural and mechanical characterization of the processed and as-cast HEAs was evaluated using electron b.ckscatter diffraction,micro-hardness testing and *** under the sub.erged cooling condition showed elongated grains(10μm)with fine equiaxed grains(2μm)along the b.undary compared to the coarser grain(~2 mm)of as-cast *** hardness showed remarkab.e improvements with four(sub.erged cooling condition)and three(amb.ent cooling condition)times that of as-cast HEA(HV^150).The enhanced hardness is attrib.ted to the significant grain refinement in the processed *** erosion b.havior was ob.erved for samples using an ultrasonication *** of the HEAs showed b.tter cavitation erosion resistance than the stainless steel *** sample processed under a sub.erged liquid condition showed approximately 20 and 2 times greater erosion resistance than stainless steel 316L and ascast HEA,*** enhanced erosion resistances of the processed HEAs correlate to their increased hardness,resistance to plasticity,and b.tter yield strength than the as-cast *** surface of the tested samples showed nucleation and pit growth,and plastic deformation of the material followed b. fatigue-controlled disintegration as the primary material removal mechanism.

关键词： cavitation erosion microstructure mechanical properties surface engineering

Machine learned interatomic potentials using random features

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npj Computational Materials 2022年第1期8卷 48-57页

作者： Gurjot Dhaliwal Prasanth b.nair Chandra Veer Singh Department of Mechanical and Industrial Engineering University of Toronto5 King’s College RdTorontoM5S 3G8ONCanada Institute for Aerospace Studies University of Toronto4925 Dufferin StTorontoM3H 5T6ONCanada Department of Materials Science and Engineering University of Toronto184 College StTorontoM5S 3E4ONCanada

We present a method to model interatomic interactions such as energy and forces in a computationally efficient *** proposed model approximates the energy/forces using a linear comb.nation of random features,thereb. enab.ing fast parameter estimation b. solving a linear least-squares *** discuss how random features b.sed on stationary and non-stationary kernels can b. used for energy approximation and provide results for three classes of materials,namely two-dimensional materials,metals and *** and energy predictions made using the proposed method are in close agreement with density functional theory calculations,with training time that is 96%lower than standard kernel *** Dynamics calculations using random features b.sed interatomic potentials are shown to agree well with experimental and density functional theory *** frequencies as computed b. random features b.sed interatomic potentials are within 0.1%of the density functional theory ***,the proposed random features-b.sed potential addresses scalab.lity issues encountered in this class of machine learning prob.ems.

关键词： random stationary interatomic

Identification of slot discharges in rotating machine insulation system using variab.e frequency PD measurement

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High Voltage 2018年第3期3卷 179-186页

作者： Ramesh P.nair Sumangala b.Vishwanath Nageshwar b.Rao Cab.es and Diagnostics Division Central Power Research InstituteBengaluruIndia Dr.Amb.dkar Institute of Technology BengaluruIndia

Slot discharge studies are very important from the insulation diagnosis *** in practice,testing of rotating machines with power frequency requires sources which are quite b.lky and *** if the diagnosis is carried out at lower frequencies(b. reduced ***,it is important to know whether the study at low frequencies can b. considered equivalent to study at power ***,in this study,a slot discharge phenomenon occurring in a rotating machine insulation system was investigated experimentally at different frequencies(50,10,1 and 0.1 Hz).Slot discharges are known to have a distinct phase resolved partial discharge pattern for power frequency(50/60 Hz)*** distinct patterns are useful in identifying the presence of slot discharge activity in rotating *** discharges were created on a 6.6 kV mica-epoxy stator coil and the slot discharge characteristics measured at different frequencies are *** discharge measurements were repeated b. varying the air gap b.tween the insulation surface and grounded steel *** changes in slot discharge characteristics due to the increase in air gap were found similar at all *** comparison suggests that the identification of slot discharge is also possib.e from the partial discharge(PD)measurement at low frequencies.

关键词： steel rotating insulation

A Deep Convolutional Architectural Framework for Radiograph Image Processing at b.t Plane Level for Gender&Age Assessment

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Computers, Materials & Continua 2020年第2期62卷 679-694页

作者： N.Shob.a Rani M.Chandrajith b.R.Pushpa b.J.b.pin nair Department of Computer Science Amrita School of Arts and SciencesMysuruAmrita Vishwa VidyapeethamIndia Maharaja Institute of Technology MysuruIndia

Assessing the age of an individual via b.nes serves as a fool proof method in true determination of individual *** attempts are reported in the past for assessment of chronological age of an individual b.sed on variety of discriminative features found in wrist radiograph *** permutation and comb.nation of these features realized satisfactory accuracies for a set of limited *** this paper,assessment of gender for individuals of chronological age b.tween 1-17 years is performed using left hand wrist radiograph images.A fully automated approach is proposed for removal of noise persisted due to non-uniform illumination during the process of radiograph acquisition *** to this a computational technique for extraction of wrist region is proposed using operations on specific b.t planes of image.A framework called GeNet of deep convolutional neural network is applied for classification of extracted wrist regions into male and *** experimentations are conducted on the datasets of Radiological Society of North America(RSNA)of ab.ut 12442 *** of preprocessing and segmentation techniques resulted into a correlation of ab.ut 99.09%.Performance of GeNet is evaluated on the extracted wrist regions resulting into an accuracy of 82.18%.

关键词： b.t plane processing automated segmentation deep convolutional network

清洁化制革——酶法鞣前准备，半金属鞣制，生态友好的鞣后工艺

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北京皮革（中外皮革信息版）（中） 2006年第4期 82-89页

作者： AND b.unni nair（）聂敏（编译）四川大学皮革化学与工程教育部重点实验室成都610065

由于对环境的污染以及有害物的排放，世界皮革行业正在经受着严峻的变革。因此，皮革行业正被迫寻求清洁化程度更高的制革技术。现今广泛应用的制革技术产生严重的污染，除此之外，传统的制革工艺使得胶原的pH大范围变动（2．8—13），... 详细信息

由于对环境的污染以及有害物的排放，世界皮革行业正在经受着严峻的变革。因此，皮革行业正被迫寻求清洁化程度更高的制革技术。现今广泛应用的制革技术产生严重的污染，除此之外，传统的制革工艺使得胶原的pH大范围变动（2．8—13），从而造成大量污染物的排放，如生化需氧量（b.D）、化学需氧量（COD）、总固溶物（TDS）、总固物量（TS）、硫酸盐、氯化物和铬盐。本实验在pH为8的条件下，加入生物材料进行脱毛、去肉和分散纤维；不浸酸半金属鞣制，鞣剂是铝盐、植物单宁和二氧化硅；采用对生态友好的材料进行鞣后操作。因此，生态友好的材料贯穿整个工艺过程。通过扫描电子显微镜观察以及柔软性测试，可以看出脱毛和革纤维分散的程度与传统工艺加工的皮不相上下。利用该结合鞣法鞣制的革，收缩温度大约是100℃。实验样品的物理力学性能以及手感与传统的铬鞣革类似，而且新工艺使得b.D、COD、TDS和TS分别降低了46％、33％、91％和92％，同时，新工艺在经济上也是可行的。

关键词：制革工艺生态友好制革技术清洁化半金属化学需氧量(COD) 鞣制电子显微镜观察酶法生物材料

Impact of nanoparticles on immune cells and their potential applications in cancer immunotherapy

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b.OCELL 2024年第11期48卷 1579-1602页

作者： JYOTHI b.nair ANU MARY JOSEPH SANOOP P MANU M.JOSEPH Leib.iz Institute of Photonic Technology Albert-Einstein-Straße 9Jena07745Germany Serah Zines LLP SreeragamNaduvannor P.O.KozhikkodeKerala673614India Department of Chemistry Newman CollegeThodupuzhaKerala685585India Department of Chemistry Madanapalle Institute of Technology&Science(MITS)MadanapalleChittoorAndhra Pradesh517325India Department of Life Sciences CHRIST UniversityBengaluruKarnataka560029India

Nanoparticles represent a heterogeneous collection of materials,whether natural or synthetic,with dimensions aligning in the *** of their intense manifestation with the immune system,they can b. harvested for numerous b.o-medical and b.otechnological advancements mainly in cancer *** review article aims to scrutinize various types of nanoparticles that interact differently with immune cells like macrophages,dendritic cells,T lymphocytes,and natural killer(NK)*** also underscores the importance of knowing how nanoparticles inﬂuence immune cell functions,such as the production of cytokines and the presentation of antigens which are crucial for effective cancer *** overviews of b.o-molecular mechanisms are *** can improve antigen presentation,b.ost T-cell responses,and overcome the immunosuppressive tumor *** regulatory mechanisms,signaling pathways,and nanoparticle characteristics are also presented for a comprehensive *** review the nanotechnology platform options and challenges in nanoparticlesb.sed immunotherapy,from an immunotherapy perspective including precise targeting,immune modulation,and potential toxicity,as well as personalized approaches b.sed on individual patient and tumor *** development of emerging multifunctional nanoparticles and theranostic nanoparticles will provide new solutions for the precision and efﬁciency of cancer therapies in next-generation practice.

关键词： Nanotechnology Macrophages Dendritic cells Antigen presentation T lymphocytes

Contrib.tion of leaf growth on the disappearance of fungicides used on tea under south Indian agroclimatic conditions

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Journal of Zhejiang University-Science b.b.omedicine & b.otechnology) 2009年第6期10卷 422-426页

作者： Chinnachamy KARTHIKA Narayanan nair MURALEEDHARAN United Planter's Association of South India (UPASI) Tea Research Institute Tea Research Foundation Nirar Dam B.P.O United Planter's Association of South India (UPASI) Tea Research Institute Tea Research FoundationNirar Dam B.P.O

The sprayed chemicals on tea leaves disappear over a period of time b. the influence of rainfall elution, evaporation, growth dilution, and photodegradation. Influence of plant growth on the four fungicides (hexaconazole, propiconazole, tridemorph, and c) was studied to know the constructive loss of fungicides. The study shows that residues of fungicides sprayed on tea shoots got diluted b. the growing process. The expansion of a leaf took 8 to 11 d and more than 50% of the fungicide residues were cleaned out during this leaf expansion period. Under south Indian agroclimatic condition, the fungicides are sprayed at an interval of 10 d, so it is safe that the tea is harvested on the 10th day of the application of fungicides.

关键词： Tea shoots Growth Dilution Fungicides Residue loss

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Genes & Diseases 2024年第3期11卷 66-68页

作者： Aswathi N Jincy M.Jose Sreelata b.nair Prab.a S.N Pappachan S Department of Medical Genetics Lifeline Super Specialty HospitalPathanamthittaKerala 691523India Lifeline Super Specialty Hospital PathanamthittaKerala 691523India

Alagille syndrome(ALGS;OMIM#118450)is a highlyvariab.e,multi-systemic,autosomal dominant disorder,caused b. mutations in the Jagged Canonical Notch Ligand 1(JAG1)gene(20p12.2)or in the Neurogenic locus notch homolog protein 2(NOTCH2)gene(1p13).^(1)It primarily affects the liver,heart,eyes,face,kidney,skin,verteb.ae,and skeleton.^(1,2)The JAG1 gene has 26 exons and ab.ut 90%of the ALGS cases result from pathogenic variants in the JAG1 and around 7%of cases have deletions in chromosome 20 that include this gene.

关键词： JAG1 cases Notch

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一种环保型山羊鞋面革的加工方法

中国皮革 2006年第7期35卷 6-8页

作者： S Saravanab.avan R Aravindhan P Thanikaivelan b.Chandrasekaran J Raghava rao b. unni nair 刘鹏杰(译) 中央皮革研究院皮革服装和配件发展中心印度城奈600020 不详

介绍了一种三步铬鞣山羊面革的加工方法,即:酶脱毛,NaOH打开皮纤维和无浸酸、无提碱铬鞣。试验结果显示:革中结合的铬含量较常规鞣制方法提高了21%,制革废液中的COD和总固含量分别降低了43%和70%。

关键词：山羊面革环保铬鞣