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Chinese Physics B 2017年第1期26卷 304-309页

作者： n yadav S Ghosh P S Malviya School of Studies in Physics Vikram University Ujjain 465010 India Department of Physics Govt. J.N.S. Post Graduate College Shujalpur 465333 India

We report nonlinear parametric interactions using a hydrodynamic model of ion-implanted semiconductor plasmas having strain-dependent dielectric constants（SDDC）. High-dielectric-constant materials are technologically important because of their nonlinear properties. We find that the third-order susceptibility varies in the range 10^-14--10^-12m^2·V^-2 for ion-implanted semiconductor plasmas, which is in good agreement with previous results. It is found that the presence of SDDC in ion-implanted semiconductor plasma modifies the characteristic properties of the material.

关键词： nonlinear parametric interactions ion-implanted semiconductor plasmas strain-dependent dielectric constant

The circuitry landscape of perovskite solar cells:An in-depth analysis

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Journal of Energy Chemistry 2024年第7期94卷 393-413页

作者： Siddhi Vinayak Pandey Daniel Prochowicz Apurba Mahapatra Saravanan Pandiaraj Abdullah n.Alodhayb Seckin Akin Pankaj yadav Department of Solar Energy School of Energy TechnologyPandit Deendayal Energy UniversityGandhinagar 382007GujaratIndia Department of Physical Chemistry Polish Academy of SciencesKasprzaka 44/5201-224 WarsawPoland Department of Self-Development Skills King Saud UniversityRiyadh 11451Saudi Arabia Department of Physics and Astronomy College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia Department of Metallurgical and Materials Engineering Necmettin Erbakan University42060 KonyaTurkey Department of Physics School of Energy TechnologyPandit Deendayal Energy UniversityGandhinagar 382007GujaratIndia

The extensive research and development in perovskite solar cells (PSCs) have rekindled the hopes of converting solar energy into *** elusive understanding of underlying mechanisms is required for the development of efficient *** the years,Impedance Spectroscopy (IS) characterization,along with complementary techniques,has proven to be an effective way to understand and analyze the charge transport and recombination at interface and bulk of *** IS of PSCs have been analyzed,interpreted,and improvised continuously,revealing intricate details about the ***,there is a lack of centralized source of these details,which make it tougher to account for the generalized approach to understand the device *** present work is focused on compiling the research done on various PSC device architectures via IS to construct a comprehensive foundation of information on impedance plots,equivalent circuits,and associated processes.

关键词： Impedance Spectroscopy Perovskite solar cells Equivalent Circuits

Preferred alignments of angular momentum vectors of galaxies in six dynamically unstable Abell clusters

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Research in Astronomy and Astrophysics 2017年第7期17卷 1-10页

作者： Shiv n.yadav Binil Aryal Walter Saurer Central Department of Physics Tribhuvan University Institute of Astro-particle Physics Innsbruck University

A spatial orientation of angular momentum vectors of galaxies in six dynamically unstable Abell clusters（S1171, S0001, A1035, A1373, A1474 and A4053） is studied. For this, twodimensional observed parameters（e.g., positions, diameters and position angles） are converted into three-dimensional（3D） rotation axes of the galaxy using the ＇position angle-inclination＇ method. The expected isotropic distribution curves for angular momentum vectors are obtained by performing random simulations. The observed and expected distributions are compared using several statistical *** preferred alignments of angular momentum vectors of galaxies are noticed in all six dynamically unstable clusters, supporting the hierarchy model of galaxy formation. These clusters have a larger value of velocity dispersion. However, local effects are noticed in the clusters that have substructures in the1D-3D number density maps.

关键词： galaxies evolution - galaxies clusters general- astronomical databases miscellaneous

Experimental and Quantum Studies on Adsorption and Corrosion Inhibition Effect on Mild Steel in Hydrochloric Acid by Thiophene Derivatives

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Acta Metallurgica Sinica(English Letters) 2014年第1期27卷 37-46页

作者： M.yadav Debasis Behera R.R.Sinha P.n.yadav Department of Applied Chemistry Indian School of Mines Department of Physics Post Graduate College

The inhibition effect of synthesized diethyl 3,4-bis（4-methoxybenzylideneamino） thieno[2,3-b] thiophene-2,5- dicarboxylate （Inh I） and diethyl 3,4-bis（benzylideneamino） thieno[2,3-b] thiophene-2,5-dicarboxylate （Inh II）, on cor- rosion of mild steel in 15% HC1 solution was investigated using weight loss measurements, electrochemical polarization, and electrochemical impedance spectroscopy techniques. The experimental results show that the inhibition efficiency of studied inhibitors increased with the increase of inhibitors concentration but decreased with the increase of temperature. Corrosion inhibition efficiencies of 94.5% and 92.1% were obtained with 250 ppm of Inh I and Inh II at 303 K, respectively. The potentiodynamic polarization measurements indicate that the studied inhibitors act as mixed inhibitor. The thermodynamic parameters of the corrosion and adsorption processes were calculated and evaluated. The adsorption of these inhibitors was found to obey Langmuir adsorption isotherm. Scanning electron microscopy was used to characterize the surface morphology of the mild steel specimens in presence and absence of inhibitors. The mechanism of the inhibition process was discussed in the light of the chemical structure and quantum-chemical calculations of the investigated inhibitors.

关键词： Mild steel Corrosion Polarization EIS Acid inhibition

Flow dynamics in low aspect ratio dump combustor

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Propulsion and Power Research 2014年第4期3卷 187-195页

作者： n.P.yadav Abhjit Kushari Department of Mechanical Engineering BIETJhansi-284128India Department of Aerospace Engineering Indian Instiute of TechnologyKampur 208016India

This paper repotts an experimental investigation of the flow field inside a low aspect ratio dump *** length of the combustor studied was less than the reattachment length for the separated *** exit of the combustor is tapered which supports the flow reversal from the exit *** flow field behaviour in the combustor is evaluated from pressure and velocity measurement *** velocity,stream function and pressure distribution inside the combustor are used to elucidate the presence of recircu lation and flow reversal from the exit section of the combustor for different Reynolds numbers.A small variation in Ums velocity was observed in axial direction while in the radial direction it was quite *** recirculation zones are recognized and the strength of the recirculation was seen to increase with flow Reynolds *** turbulence intensity in the recirculation and shear layer zone was seen to be higher than the potential core.

关键词： Dump combustor Flow dynamics Circulation Turbulence Stream function

Application of Response Surface Methodology for Analysing and Optimizing the Finned Solar Air Heater

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Journal of Thermal Science 2024年第3期33卷 985-1009页

作者： Vineet SInGH Vinod Singh yadav Vaibhav TRIVEDI Manoj KUMAR niraj KUMAR Department of Mechanical Engineering School of Engineering&TechnologyIFTM UniversityMoradabadUttar PradeshIndia Department of Mechanical Engineering NITUttarakhandPauriUttarakhandIndia Department of Electronics and Communication Engineering Jaypee Institute of Information TechnologyNoidaUttar Pradesh201309India

In this research paper,a solar air heater with triangular fins has been experimentally analysed and ***,an experimental set-up of a solar air heater having triangular fins has been developed at the location of 28.10°n,78.23°*** heat transfer rate through fins and fins efficiency has been determined by the Finite Difference Method model *** experimental data and modeled data of response parameters have been optimized in MInITAB-17 software by the Response Surface Methodology *** creating the response surface design,three input parameters have been selected namely solar intensity,Reynolds number,and fin base-to-height *** range of solar intensity,Reynolds number,and fin base-to-height ratio is 600 to 1000W/m^(2),4000 to 6000,and 0.4 to 0.8 *** response surface design has been analyzed by calculating the outlet temperature,friction factor,nusselt number,fin efficiency,thermal performance factor,and exergy *** optimum settings of input parameters:solar intensity is 1000 W/m^(2);Reynolds number is 4969.7,and the fin base to height ratio is 0.6060,on which these response:namely outlet temperature of 92.531℃,friction factor of 0.2350,nusselt number of 127.761,thermal efficiency of 50.836%,thermal performance factor of 1.4947,and exergy efficiency of 8.762%.

关键词： solar air heater optimization fins exergy response surface methodology air

Sensing of ultrasonic fields based on polarization parametric indirect microscopic imaging

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Chinese Optics Letters 2019年第4期17卷 89-94页

作者：曹云熊吉川刘学峰夏志颖王惟泽 n.P.yadav 刘卫平 School of Electronic and Optical Engineering Nanjing University of Science and Technology

This Letter tackles the issue of non-contact detection of ultrasonic fields by utilizing a novel optical method based on the parametric indirect microscopic imaging(PIMI) technique. A general theoretical model describing the three-dimensional anisotropic photoelastic effect in solid was developed. The mechanism of polarization status variations of light passing through the stress and strain fields was analyzed. non-contact measurements of the ultrasonic field propagating in an isotropic quartz glass have been fulfilled by the PIMI technique under different ultrasonic excitation conditions. PIMI parameters such as sin δ, Φ, and the Stokes parameters have been found to be sensitive to ultrasonic fields.

关键词： Letter tackles detection of ultrasonic ultrasonic fields

new insights into nitric oxide biosynthesis underpin lateral root development

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Molecular Plant 2024年第5期17卷 691-693页

作者： Kapuganti Jagadis Gupta nidhi yadav Aprajita Kumari Gary J.Loake national Institute for Plant Genome Research Aruna Asaf Ali MargNew Delhi 110070India Institute of Molecular Plant Sciences School of Biological SciencesUniversity of EdinburghEH93BF EdinburghUK Centre for Engineering Biology School of Biological SciencesUniversity of EdinburghEH93BF EdinburghUK

In recent years,nitric oxide(nO)has emerged as a key redox signaling molecule in plants functioning in the regulation of key developmental programs and the orchestration of responses to a plethora of environmental cues(Kolbert et al.,2019).The predominant route for the transfer of nO bioactivity is through S-nitrosylation,the addition of an nO moiety to a protein cysteine thiol to form an S-nitrosothiol(Yun et al.,2011).Specificity for this process is established by the structural constraints imposed by tertiary protein structure in gating access to given cysteine redox switches and associated proteins that can either facilitate the addition or removal of the nO moiety at these residues(Umbreen et al.,2018).

关键词： moiety addition redox

Electronic properties of 2D materials and their junctions

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nano Materials Science 2024年第1期6卷 1-23页

作者： Taposhree Dutta neha yadav Yongling Wu Gary J.Cheng Xiu Liang Seeram Ramakrishna Aoussaj Sbai Rajeev Gupta Aniruddha Mondal Zheng Hongyu Ashish yadav Department of Chemistry Indian Institute of Engineering Science and TechnologyShibpurWest Bengal711103India Center for Advanced Laser Manufacturing(CALM) Shandong University of TechnologyZibo255000PR China School of Industrial Engineering Purdue University315 N.Grant St.West LafayetteIN47907United States Birck nanotechnology Center Purdue University1205 W State St.West LafayetteIN47907United States Advanced Materials Institute Qilu University of TechnologyShandong Academy of SciencesJinan250014PR China nanoscience and nanotechnology Initiative National University of Singapore10 Kent Ridge Crescent119260Singapore Faculty of Applied Phsyics and Mathematics Gdansk University of Technology Narutowicza 11/1280233GdanskPoland Department of Physics School of EngineeringUniversity of Petroleum&Energy StudiesDehradun248007UttarakhandIndia Department of Physics National Institute of Technology DurgapurDurgapur713209West BengalIndia

With an extensive range of distinctive features at nano meter-scale thicknesses,two-dimensional(2D)materials drawn the attention of the scientific *** tremendous advancements in exploratory research on 2D materials,knowledge of 2D electrical transport and carrier dynamics still in its ***,here we highlighted the electrical characteristics of 2D materials with electronic band structure,electronic transport,dielectric constant,carriers *** atomic thinness of 2D materials makes substantially scaled field-effect transistors(FETs)with reduced short-channel effects conceivable,even though strong carrier mobility required for high performance,low-voltage device *** also discussed here about factors affecting 2D materials which easily enhanced the activity of those materials for various ***,Those 2D materials used in state-of-the-art electrical and optoelectronic devices because of the extensive nature of their electronic band structure.2D materials offer unprecedented freedom for the design of novel p-n junction device topologies in contrast to conventional bulk *** also,describe the numerous 2D p-n junctions,such as homo junction and hetero junction including mixed dimensional ***,we talked about the problems and potential for the future.

关键词： 2D materials Electrical properties p-n junctions Mixed hereto junctions Homo junctions Electrical transport

Immunogenic potential and protective efficacy of formalin inactivated circulating Indian strain of West nile virus

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Asian Pacific Journal of Tropical Medicine 2014年第12期7卷 946-951页

作者： Pritom Chowdhury Siraj Ahmed Khan Rashmee Topno Prafulla Dutta R.n.S.yadav Jagadish Mahanta Regional Medical Research Centre ICMR(NE Region)DibrugarhAssamIndia Centre for studies in Biotechnology Dibrugarh UniversityDibrugarh-786004AssamIndia

Objective:To assess the best suitable condition for virus *** to study the immunogenic potential and protective efficacy of a circulating West nile virus(WnV) strain in ***:Bulk preparation of circulating WnV:WnIRGC07(GeneBank ID:HQ246154).was undertaken in a bioreaclor using *** Inactivation was done in three different conditions:22 ℃.4 ℃ and room *** virus preparations were evaluated for antigenicity by ELISA and toxicity by cell proliferation *** efficacy was done in-viro on swiss albino mice against standard Indian WnV and Japanese encephalitis virus(JKV)*** and cell mediated immune response was evaluated in mice sera by ELISA and neutralization ***:Inactivation at 22 ℃ was found to be more suitable in terms of less toxicity and high *** same was selected to study the immune response and efficacy in *** induced neutralizing antibody titre of 1:625 and high EgG *** vivo experiment showed 100% protective efficacy against WnV and 20.8% cross protective efficacy against *** assessment of cellular immunity through immunized mice revealed augmentation of high levels of pro-inflammatory cytokines and moderate levels of anti—cytokines indicating a mixed balance of Th1 and Th2 ***:Findings suggest that formalin inactivated Indian WnV strain has a good immunogenic *** is the first study on assessment of immunogenic potential of a lineage 5 strain of *** study reveals that it would be a promising and effective candidate for vaccine studies which warrants further evaluation.

关键词： West nile virus Assam Immunization Efficacy neutralizing antibody Cytokine