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npj Computational Materials 2017年第1期3卷 464-469页

作者： Ashok Kumar shalini kumari Hitesh Borkar Ram S Katiyar James Floyd Scott CSIR-National Physical Laboratory Dr.K.S.Krishnan MargNew Delhi 110012India Academy of Scientific and Innovative Research(AcSIR) CSIR-National Physical Laboratory(CSIR-NPL)CampusDr.K.S.Krishnan MargNew Delhi 110012India Department of Physics and Institute for Functional Nanomaterials University of Puerto RicoSan JuanPR 00931-3334USA Department of Chemistry and Department of Physics University of St AndrewsSt AndrewsScotland KY16 STUK

We present detailed Raman studies of SrZrO_(3)(SZO)that show three anomalies in Raman modes:One has a small jump in frequencyω,one has its intensity vanish,and a third has a sharp change in temperature derivative dω(T)/dT from flat below T=600 K to a Curie-Weiss dependence above 600 K with extrapolation to zero frequency at the known transition temperature T=970 K,thereby proving the latter to be *** addition,the P4mm ferroelectric phase predicted at high stresses has preliminary support from polarization-voltage *** inference of a new transition in the temperature region 600-650 K is in disagreement with neutron *** are given for family member SrSnO_(3) and SrHfO_(3),and we discuss the different conclusions of Kennedy and *** show that a known transition in SrHfO_(3) is also displacive with a well-behaved soft mode.

关键词： transition phase thereby

Reconstructing phase diagrams from local measurements via Gaussian processes:mapping the temperature-composition space toconfidence

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npj Computational Materials 2018年第1期4卷 451-461页

作者： Dhiren K.Pradhan shalini kumari Evgheni Strelcov Dillip K.Pradhan Ram S.Katiyar Sergei V.Kalinin Nouamane Laanait Rama K.Vasudevan Department of Physics and Institute of Functional Nanomaterials University of Puerto Rico San Juan PR 00936 USA Institute for Research in Electronics and Applied Physics University of MarylandCollege ParkMD 207425USA Department of Physics&Astronomy National Institute of TechnologyRourkela 769008India Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USA Institute for Functional Imaging of Materials Oak Ridge National LaboratoryOak RidgeTN 37831USA Geophysical Laboratory Carnegie Institution for ScienceWashingtonDC 20015USA Department of Physics and Astronomy West Virginia UniversityMorgantownWV 26506USA

We show the ability to map the phase diagram of a relaxor-ferroelectric system as a function of temperature and composition through local hysteresis curve acquisition,with the voltage spectroscopy data being used as a proxy for the(unknown)microscopic state or thermodynamic parameters of *** the discrete nature of the measurement points,we use Gaussian processes to reconstruct hysteresis loops in temperature and voltage space,and compare the results with the raw data and bulk dielectric spectroscopy *** results indicate that the surface transition temperature is similar for all but one composition with respect to the *** clustering algorithms,we recreate the main features of the bulk diagram,and provide statistical confidence estimates for the reconstructed phase transition *** validate the method by using Gaussian processes to predict hysteresis loops for a given temperature for a composition unseen by the algorithm,and compare with *** techniques can be used to map phase diagrams from functional materials in an automated fashion,and provide a method for uncertainty quantification and model selection.

关键词： materials hysteresis phase

Autonomous scanning probe microscopy investigations over WS_(2)and Au{111}

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npj Computational Materials 2022年第1期8卷 916-922页

作者： John C.Thomas Antonio Rossi Darian Smalley Luca Francaviglia Zhuohang Yu Tianyi Zhang shalini kumari Joshua A.Robinson Mauricio Terrones Masahiro Ishigami Eli Rotenberg Edward S.Barnard Archana Raja Ed Wong D.Frank Ogletree Marcus M.Noack Alexander Weber-Bargioni Molecular Foundry Lawrence Berkeley National LaboratoryBerkeleyCA94720United States Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCA94720United States Department of Physics and NanoScience Technology Center University of Central FloridaOrlandoFL32816United States Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPA16082United States Center for Two-Dimensional and Layered Materials The Pennsylvania State UniversityUniversity ParkPA16802United States Department of Physics and Department of Chemistry The Pennsylvania State UniversityUniversity ParkPA16802United States Center for Advanced Mathematics for Energy Research Applications Lawrence Berkeley National LaboratoryBerkeleyCA94720United States

Individual atomic defects in 2D materials impact their macroscopic *** the interplay is challenging,however,intelligent hyperspectral scanning tunneling spectroscopy(STS)mapping provides a feasible solution to this technically difficult and time consuming ***,dense spectroscopic volume is collected autonomously via Gaussian process regression,where convolutional neural networks are used in tandem for spectral *** data enable defect segmentation,and a workflow is provided for machine-driven decision making during experimentation with capability for user *** provide a means towards autonomous experimentation for the benefit of both enhanced reproducibility and *** investigations on WS_(2)sulfur vacancy sites are explored,which is combined with local density of states confirmation on the Au{111}herringbone *** vacancies,pristine WS_(2),Au face-centered cubic,and Au hexagonal close-packed regions are examined and detected by machine learning methods to demonstrate the potential of artificial intelligence for hyperspectral STS mapping.

关键词： autonomous consuming packed

Gasification kinetic studies of low volatile weakly caking coal

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International Journal of Coal Science & Technology 2023年第2期10卷 159-168页

作者： Akanksha Mishra shalini Gautam Tripurari Sharma Department of Mechanical Engineering Sharda School of Engineering and TechnologySharda UniversityG.NoidaIndia Department of Fuel Minerals and Metallurgical EngineeringIndian Institute of Technology(ISM)DhanbadIndia

Present investigation focuses on the fractional conversion of low volatile weakly caking coal(LVWC)under the standard set of operating conditions for *** this purpose,samples of LVWC of different ash content have been collected from Kusunda Area of Bharat Coking Coal *** results were validated using Homogenous and Shrinking Core kinetic models and the suitability of selected samples for gasification was assessed by estimating the activation *** values of activation energy for LVWC samples were obtained in the range of 25.17-44.09 kJ/***,empirical models were developed to correlate the response of interest with the input variables(temperature,residence time and CO_(2) flow rate).The significance of these developed empirical models was checked using analysis of variance(ANOVA).

关键词： LVWC Gasification CO_(2) Activation energy

Assessing Anthropogenic Pressure and Its Impact on Hippophae salicifolia Pockets in Central Himalaya,Uttarakhand

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Journal of Mountain Science 2013年第3期10卷 464-471页

作者： Deepak DHYANI shalini DHYANI RK MAIKHURI G.B.Pant Institute of Himalayan Environment and Development Garhwal UnitSrinagar GarhwalUttarakhandIndia

Natural habitat ofHippophae salicifolia in Central Himalaya is continuously being degraded due to habitat destruction and harvesting. Although logging is prohibited, habitat destruction has increased because of regular road construction, repairing and broadening activities. In addition, Hippophae resources are continuously being harvested by lopping （both partial and complete） for fuelwood, fodder and fruits in higher Himalayan region. This paper presents a detailed analysis of relationship between density, demographic structure, and harvesting of H. salicifolia growing pockets in the five major valleys （Gangotri, Yamunotri, Niti, Mana and Bhyundhar） of Uttarakhand in Central Himalaya, India. A total of 12o quadrats were laid randomly to study population structure, regeneration, sex ratio and lopping using quadrats of lOO m2 （a4 in each valley） in Hippophae growing patches. Our study shows that the density, size distribution, and regeneration of Hippophae vary considerably among the major valleys. Trees in the Yamunotri valley have the highest density of large trees but the lowest density of seedlings. In contrast, there are few large trees but many seedlings in the Mana valley. The number and size of lopped trees also varied among the valleys. Lopping was greatest in Bhyundhar （11.4%） and Yamunotri （19.7%） and least in Niti （3.9%）. The size of lopped trees differed substantially as well. In Bhyundhar, the largest trees were taken while saplings were taken in Yamunotri. Our study revealed that unsustainable harvesting from plants for fuel, fencing and fruits along with road broadening activities in Central Himalaya are the main cause ofhabitat destruction. Our research highlights the urgent need for in-situ and ex-situ conservation of Hippophae salicifolia so that it＇s potential can be harnessed sustainably by rural hill societies for their socio-economic development.

关键词： Central Himalaya Seabuckthorn Dioecious Disturbance Habitat Conservation

Synthesis,characterization and application of Lagerstroemia speciosa embedded magnetic nanoparticle for Cr(Ⅵ)adsorption from aqueous solution

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Journal of Environmental Sciences 2017年第5期29卷 283-293页

作者： shalini Srivastava Shashi Bhushan Agrawal Monoj Kumar Mondal Department of Botany Institute of Science Banaras Hindu University Varanasi 221005 India Department of Chemical Engineering and Technology Indian Institute of Technology Banaras Hindu University Varanasi 221005 Uttar Pradesh India

Lagerstroemia speciosa bark（LB） embedded magnetic nanoparticles were prepared by co-precipitation of Fe2＋ and Fe3＋ salt solution with ammonia and LB for Cr（Ⅵ） removal from aqueous *** native LB,magnetic nanoparticle（MNP）,*** embedded magnetic nanoparticle（MNPLB） and Cr（Ⅵ） adsorbed MNPLB particles were characterized by SEM-EDX,TEM,BET-surface area,FT-IR,XRD and TGA *** analysis confirmed nearly spherical shape of MNP with an average diameter of 8.76 nm and the surface modification did not result in the phase change of MNP as established by XRD analysis,while led to the formation of secondary particles of MNPLB with diameter of 18.54 *** results revealed covalent binding between the hydroxyl group of MNP and carboxyl group of LB particles and further confirmed its physico-chemical nature favorable for Cr（Ⅵ） *** Cr（Ⅵ） adsorption on to MNPLB particle as an adsorbent was tested under different contact time,initial Cr（Ⅵ） concentration,adsorbent dose,initial pH,temperature and agitation *** results of the equilibrium and kinetics of adsorption were well described by Langmuir isotherm and pseudo-second-order model,*** thermodynamic parameters suggest spontaneous and endothermic nature of Cr（Ⅵ）adsorption onto *** maximum adsorption capacity for MNPLB was calculated to be 434.78 mg/g and these particles even after Cr（Ⅵ） adsorption were collected effortlessly from the aqueous solution by a *** desorption of Cr（Ⅵ）-adsorbed MNPLB was found to be more than 93.72%with spent MNPLB depicting eleven successive adsorption-desorption cycles.

关键词： Lagerstroemia speciosa Magnetic nanoparticles Co-precipitation Cr(Ⅵ) ions Adsorption capacity

The catalytic activity of transition metal oxide nanoparticles on thermal decomposition of ammonium perchlorate

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Defence Technology（防务技术） 2019年第4期15卷 629-635页

作者： Jalpa A. Vara Pragnesh N. Dave shalini Chaturvedi Department of Chemistry K S K V Kachchh University Mundra Road Bhuj 370 001 Gujarat India Department of Chemistry Sardar Patel University Vallabh Vidyangar 388 120 Gujarat India Samarpan Science and Commerce College Gandhinagar Gujarat India

The catalytic proficiency of three MONs for AP thermal decomposition was studied in this work.A chemical co-precipitation method was used for synthesis of MONs(CuZnO,CoZnO,and NiZnO)and their characterization carried out by utilizing XRD,FTIR,and *** TGA/DSC technique was employed for the investigation of the catalytic proficiency of MONs on the *** DSC data were used for measuring activation energy of catalyzed AP by using Ozawa,Kissinger,and Starink *** MONs were much sensitive for AP decomposition,and the performance of AP decomposition was further *** all the MONs,the CuZnO exhibits higher catalytic action than others and decomposition temperature of AP is descending around 117℃ by *** reduction in the activation energy was noticed after the incorporation of MONs in AP.

关键词： Metal oxide nanoparticles(MONs) Ammonium perchlorate(AP) Catalytic activity Activation energy

Performance optimization of tri-gate junctionless FinFET using channel stack engineering for digital and analog/RF design

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Journal of Semiconductors 2023年第11期44卷 89-100页

作者： Devenderpal Singh shalini Chaudhary Basudha Dewan Menka Yadav Department of Electronics and Communication Engineering Malaviya National Institute of TechnologyJaipurRajasthan-302017India

This manuscript explores the behavior of a junctionless tri-gate FinFET at the nano-scale region using SiGe material for the *** the analysis,three different channel structures are used:(a)tri-layer stack channel(TLSC)(Si-SiGe-Si),(b)double layer stack channel(DLSC)(SiGe-Si),(c)single layer channel(SLC)(S_(i)).The I−V characteristics,subthreshold swing(SS),drain-induced barrier lowering(DIBL),threshold voltage(V_(t)),drain current(ION),OFF current(IOFF),and ON-OFF current ratio(ION/IOFF)are observed for the structures at a 20 nm gate *** is seen that TLSC provides 21.3%and 14.3%more ON current than DLSC and SLC,*** paper also explores the analog and RF factors such as input transconductance(g_(m)),output transconductance(gds),gain(gm/gds),transconductance generation factor(TGF),cut-off frequency(f_(T)),maximum oscillation frequency(f_(max)),gain frequency product(GFP)and linearity performance parameters such as second and third-order harmonics(g_(m2),g_(m3)),voltage intercept points(VIP_(2),VIP_(3))and 1-dB compression points for the three *** results show that the TLSC has a high analog performance due to more gm and provides 16.3%,48.4%more gain than SLC and DLSC,respectively and it also provides better *** the results are obtained using the VisualTCAD tool.

关键词： short channel effects(SCEs) junctionless FinFET analog and RF parameters SiGe

Role of beneficial microbial gene pool in mitigating salt/nutrient stress of plants in saline soils through underground phytostimulating signalling molecules

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Pedosphere 2023年第1期33卷 153-171页

作者： shalini TIWARI Barkha SHARMA Neha BISHT Lakshmi TEWARI Department of Microbiology College of Basic Science&HumanitiesG.B.Pant University of Agriculture&TechnologyPantnagarUttarakhand 263145India

Soil salinity diminishes soil health and reduces crop yield,which is becoming a major global *** stress is one of the primary stresses,leading to several other secondary stresses that restrict plant growth and soil *** major secondary stresses induced in plants under saline-alkaline conditions include osmotic stress,nutrient limitation,and ionic stress,all of which negatively impact overall plant *** stressed conditions,certain beneficial soil microflora are known to have evolved phytostimulating mechanisms,such as the synthesis of osmoprotectants,siderophores,1-aminocyclopropane-1-carboxylic acid(ACC)deaminase activity,phosphate solubilization,and hormone production,which enhance plant growth and development while mitigating nutrient *** soil-borne bacterial species such as Bacillus,Pseudomonas,and Klebsiella and fungal strains such as Trichoderma,Aspergillus,Penicillium,Alternaria,and Fusarium also aid in reducing salinity ***-solubilizing microorganisms also assist in nutrient acquisition via both enzymatic and non-enzymatic *** the case of enzymatic processes,they produce different enzymes such as alkaline phosphatases and phytases,whereas non-enzymatic processes produce organic acids such as gluconic,citric,malic,and oxalic *** native halotolerant/halophilic soil microbial gene pool with multifunctional traits and stress-induced gene expression can be developed as suitable bio-inoculants to enhance stress tolerance and optimize plant growth in saline soils.

关键词： abiotic stress crop improvement gene expression halotolerant microbial diversity phosphate solubilization plant growth promoting traits soil health

Biology of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and the humoral immunoresponse:a systematic review of evidence to support global policy-level actions and research

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Global Health Journal 2022年第1期6卷 38-43页

作者： shalini Nair Xinguang Chen Department of Epidemiology University of Florida2004 Mowry RoadGainesvilleFlorida32610USA

Background Both population-level epidemiological data and individual-level biological data are needed to control the coronavirus disease 2019(COVID-19)***-level data are widely available and efforts to combat COVID-19 have generated proliferate data on the biology and immunoresponse to the causative pathogen,severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).However,there remains a paucity of systemized data on this *** In this review,we attempt to extract systemized data on the biology and immuno-response to SARS-CoV-2 from the most up-to-date peer-reviewed *** will focus on the biology of the virus and immunological variations that are key for determining long-term immunity,transmission potential,and *** Sources and Methods Peer-reviewed articles were sourced from the PubMed database and by snowballing search of selected *** terms included:“Novel Coronavirus”OR“COVID-19”OR“SARS-CoV-2”OR“2019-nCoV”AND“Immunity”OR“Immune Response”OR“Antibody Response”OR“Immunologic Response”.Studies published from December 31,2019 to December 31,2020 were *** ensure validity,papers in pre-print were *** Of 2889 identified papers,36 were *** from these studies suggests early seroconversion in patients infected with *** titers appear to markedly increase two weeks after infection,followed by a plateau.A more robust immune response is seen in patients with severe COVID-19 as opposed to mild or asymptomatic *** trend persists with regard to the length of antibody ***,overall immunity appears to wane within two to three months *** Findings of this study indicate that immune responses to SARS-CoV-2 follow the general pattern of viral *** generated through natural infection appears to be short,suggesting a need for long-term efforts to control the *** testing will be essential to gauge t

关键词： Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) Coronavirus disease 2019(COVID-19) Immunoresponse Antibody Global health Health policy Decision-making Serology testing