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Nitrous oxide emissions in nonflooding period from fallow paddy fields

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Journal of Environmental Sciences 2008年第11期20卷 1335-1340页

作者： hari K Pant Department of Environmental Geographic and Geological Sciences Lehman College of the City University of New York250 Bedford Park Blvd WestBronxNY 10468US

The study was conducted to investigate the N2O emissions and dissolved N2O in the leachate during the nonflooding period in nongrowing paddy *** kinds of paddy soils were repacked to soil columns and were supersaturated with water initially and dried gradually in a greenhouse to attain the N2O emissions flux during the *** with the texture of silty clay-loam (Q and H) produced cracks during the drying of soil,but soil with the texture of silty loam (X) did not form the *** s...

关键词： nitrous oxide emission cracks soil drying paddy soil

液晶弹性体单元协同驱动作为功能设计平台（英文）

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Science China Materials 2025年第1期 236-243页

作者：王瑾宇 hari Krishna Bisoyi 黄银亮徐艺艺张新芳范奔杨涛刘志洋黄帅李全 Institute of Advanced Materials and School of Chemistry and Chemical Engineering Southeast University Materials Science Graduate Program Kent State University

未来软体机器人设备的复杂性远超当前标准,因而需要建立新的设计方法.该方法需整合多个系统,以同步软执行器的运动和信号响应,从而增强柔性设备的智能性.本文提出了一个基于液晶弹性体(LCE)单元的平台,该平台将单元整合成组,以创建可扩...

未来软体机器人设备的复杂性远超当前标准,因而需要建立新的设计方法.该方法需整合多个系统,以同步软执行器的运动和信号响应,从而增强柔性设备的智能性.本文提出了一个基于液晶弹性体(LCE)单元的平台,该平台将单元整合成组,以创建可扩展的功能.每个单元的行为都是一个柔性驱动模块,可以在特定、稳定和可控的模式下进行双轴膨胀.通过以不同的方式组织LCE单元,分别实现了自适应性的软夹持器、信息处理的半加器和可调的声子带隙.这表明通过精巧地重新组装这些单元,可以在结构和功能上具备高度的可重构性和可扩展性.这种设计策略有望整合传统软执行器无法具备的多种功能,为开发智能软机器人提供平台.

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Multi-Objective Optimization of Fused Deposition Modeling for Mechanical Properties of Biopolymer Parts Using the Grey-Taguchi Method

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Chinese Journal of Mechanical Engineering 2023年第1期36卷 51-64页

作者： Kapil Kumar hari Singh Department of Mechanical Engineering National Institute of TechnologyKurukshetra136119India

The urgent need to develop customized functional products only possible by 3D printing had realized when faced with the unavailability of medical devices like surgical instruments during the coronavirus-19 disease and the ondemand necessity to perform surgery during space *** have recently been the most appropriate option for fabricating surgical instruments via 3D printing in terms of cheaper and faster *** all 3D printing techniques,fused deposition modelling(FDM)is a low-cost and more rapid printing *** article proposes the fabrication of surgical instruments,namely,forceps and hemostat using the fused deposition modeling(FDM)*** mechanical properties are the only indicator to judge the quality of the functional *** mechanical properties of FDM-processed parts depend on various process *** parameters are layer height,infill pattern,top/bottom pattern,number of top/bottom layers,infill density,flow,number of shells,printing temperature,build plate temperature,printing speed,and fan *** strength and modulus of elasticity are chosen as evaluation indexes to ascertain the mechanical properties of polylactic acid(PLA)parts printed by *** experiments have performed through Taguchi’s L27orthogonal array(OA).Variance analysis(ANOVA)ascertains the significance of the process parameters and their percent contributions to the evaluation ***,as a multiobjective optimization technique,grey relational analysis(GRA)obtains an optimal set of FDM process parameters to fabricate the best parts with comprehensive mechanical *** electron microscopy(SEM)examines the types of defects and strong bonding between *** proposed research ensures the successful fabrication of functional surgical tools with substantial ultimate tensile strength(42.6 MPa)and modulus of elasticity(3274 MPa).

关键词： Fused deposition modeling Mechanical properties Taguchi method ANOVA Grey relational analysis SEM

Muscular abnormalities in liver cirrhosis

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World Journal of Gastroenterology 2021年第29期27卷 4862-4878页

作者： Andrej hari Department of Gastroenterology and Hepatology General Hospital CeljeCelje 3000SavinjskaSlovenia

Sarcopenia is becoming a well-established player in evaluating patients with chronic liver *** regarding its clinical significance and consequences in the course of liver disease have been growing;many of the data support the idea that it impacts decompensation event frequency,prolonged hospitalization,and mortality,as well as providing the possibility to better prioritize patients on lists awaiting liver *** assessing the whole clinical scope of the field,which includes malnutrition and frailty,as well as the complete spectrum of muscle mass,strength,and function,it becomes clear that a well-founded approach in everyday clinical practice is *** this respect,this article attempts to unveil the most recently published data regarding possible methods and modalities that could be used to diagnose sarcopenia as early as possible,along with the required accuracy and *** the most important field discoveries to data that need further clarification,the merits and weaknesses of the very diverse existing evaluation methods are ***,a critical overview is given,in an attempt to discern study lines of importance from those that could pose further ambiguity for the *** author also poses relevant questions that remain unanswered but are of clinical importance in the field.

关键词： Sarcopenia Liver cirrhosis Frailty Muscle strength Nutrition indices Risk factors

Analysis of chemical composition and bioactive property evaluation of Indian propolis

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Asian Pacific Journal of Tropical Biomedicine 2012年第8期2卷 651-654页

作者： R Thirugnanasampandan sayana Beena Raveendran R Jayakumar PG and Research Department of Biotechnology Kongunadu Arts and Science College Department of Molecular Medicine Faculty of MedicineUniversity of Malaya

Objective:To analyze the chemical composition and to evaluate the bioactive potential of hydroalocoholic extract of ***:Ethanol extract of propolis was analyzed by GCMS,HPTLC and HPLC methods and in vitro antioxidant,anticholinesterase and cytotoxicity assay were ***:GC-MS analysis revealed the presence of fatty acids,alcohols, and *** was identified and quantified by HPTLC and HPLC *** dependent DPPH and hydroxyl radical scavenging activity of hydroalcoholic extract of propolis was calculated as 16.20 and 34.33 μg/mL *** of lipid peroxidation was significant and the IC_(50) value was calculated as 55.56 μg/*** activity was less *** cytotoxic activity against both breast(MCF-7) and lung cancer(A543) cell lines were significant and the IC_(50)value was calculated as 10 and 13 μg/mL ***: These findings showed that bioactive compounds present in propolis will alleviate many diseases and can be used for better human health.

关键词： Propolis Densitometry Quercetin Antioxidant Anticholinesterase Cytotoxicity

A three-dimensional numerical study on the effect of geometric asymmetry on arcjet thruster performance

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Plasma Science and Technology 2023年第5期25卷 131-146页

作者： hari Prasad NANDYALA Amit KUMAR Jayachandran THANKAPPAN Department of Aerospace Engg Indian Institute of Technology Madras

In an arcjet thruster,the cathode and constrictor degrade with time,and the electrical arc discharge may become *** this work,a three-dimensional numerical model of a hydrogen plasma arcjet is developed and validated to study the effect of unsymmetrical electric arc discharge on thruster *** unsymmetrical arc discharge is realized by introducing a radial shift of the cathode so that the cathode tip offset is 80μm(25%of the constrictor radius).Simulations are conducted for both axially centered cathode(coaxial)and off-centered cathode(non-coaxial)configurations with identical propellant flow rates and input *** show asymmetrical arc discharge in the non-coaxial cathode configuration,resulting in azimuthally asymmetric Joule heating,species concentrations,and velocity *** asymmetry continues as the plasma expands in the divergent section of the ***,species concentrations,and axial velocity exhibit asymmetric radial distribution at the nozzle *** computed Joule heating was found to reduce with cathode shift,and consequently,the thrust and specific impulse of the thruster was decreased by about 6.6%.In the case of the non-coaxial cathode,geometric asymmetry also induces a small side thrust.

关键词： arcjet geometric asymmetry 3D numerical modelling space electric propulsion hydrogen

Design of a USIM and ECC based handover authentication scheme for 5G-WLAN heterogeneous networks

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Digital Communications and Networks 2020年第3期6卷 341-353页

作者： Amit Kumar hari Om Department of Computer Science and Engineering Indian Institute of Technology(ISM)DhanbadJharkhand826004India

A variety of wireless communication technologies have been developed to provide services to a large number of *** future integrated 5G-WLAN wireless networks will support seamless and secure roaming,and various types of real-time applications and services,which will be the trend of next-generation computing *** this paper,we discuss the privacy and security problems in 5G-WLAN heterogeneous networks and present a logical 5G-WLAN integrated *** also propose a novel USIM and ECC based design of handover authentication for next-generation 5G-WLAN heterogeneous networks that can provide secure and seamless Internet *** scheme has the features of strong security and better performance in terms of computation cost,energy cost,and storage cost as compared with the state-of-the-art schemes.

关键词： 5G ECC WLAN Handover Heterogeneous

Fusion of Feature Ranking Methods for an Effective Intrusion Detection System

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Computers, Materials & Continua 2023年第8期76卷 1721-1744页

作者： Seshu Bhavani Mallampati Seetha hari School of Computer Science and Engineering VIT-AP UniversityAndhra PradeshIndia Center of Excellence AIand RoboticsVIT-AP UniversityAndhra PradeshIndia

Expanding internet-connected services has increased cyberattacks,many of which have grave and disastrous *** Intrusion Detection System(IDS)plays an essential role in network security since it helps to protect the network from vulnerabilities and *** extensive research was reported in IDS,detecting novel intrusions with optimal features and reducing false alarm rates are still ***,we developed a novel fusion-based feature importance method to reduce the high dimensional feature space,which helps to identify attacks accurately with less false alarm ***,to improve training data quality,various preprocessing techniques are *** Adaptive Synthetic oversampling technique generates synthetic samples for minority *** the proposed fusion-based feature importance,we use different approaches from the filter,wrapper,and embedded methods like mutual information,random forest importance,permutation importance,Shapley Additive exPlanations(SHAP)-based feature importance,and statistical feature importance methods like the difference of mean and median and standard deviation to rank each feature according to its *** by simple plurality voting,the most optimal features are *** the optimal features are fed to various models like Extra Tree(ET),Logistic Regression(LR),Support vector Machine(SVM),Decision Tree(DT),and Extreme Gradient Boosting Machine(XGBM).Then the hyperparameters of classification models are tuned with Halving Random Search cross-validation to enhance the *** experiments were carried out on the original imbalanced data and balanced *** outcomes demonstrate that the balanced data scenario knocked out the imbalanced ***,the experimental analysis proved that our proposed fusionbased feature importance performed well with XGBM giving an accuracy of 99.86%,99.68%,and 92.4%,with 9,7 and 8 features by training time of 1.5,4.5 and 5.5 s on Network Security Laborat

关键词： Cyber security feature ranking imbalance preprocessing IDS SHAP

Novel predictive tool for accurate estimation of packed column size

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Journal of Natural Gas Chemistry 2010年第2期19卷 146-150页

作者： Alireza Bahadori hari B.Vuthaluru Department of Chemical Engineering Curtin University of TechnologyGPO Box U1987PerthWA 6845Australia

Traditionally the majority of fractionation columns in natural gas processing plants were equipped with *** an option to trayed columns is to use *** columns offer a larger surface area per unit volume for mass transfer and the continuous gas to liquid contact throughout the column rather than at specific levels （such as in tray columns）.For process design purposes,it is essential to estimate the pressure drop for enabling the proper operation of packed *** this study,a simple generalized pressure drop correlation （GPDC） which is easier than existing approaches requiring more complicated and longer computations is developed for sizing randomly packed fractionation columns for pressure drops up to 150 mm water per meter of *** correlation can be used to estimate pressure drop for a given loading and column ***,for a given pressure drop the diameter can be *** predictions from the proposed correlation have been compared with reported data and found good agreement with average absolute deviation hovering around 4.9%.The proposed predictive tool is superior owing to its accuracy and clear numerical background,wherein the relevant coefficients can be retuned quickly if new and more accurate data are available in the *** proposed simple-to-use approach can be of immense practical value for the engineers and scientists to have a quick check on the pressure drop in packed columns for a given loading and column *** particular,gas engineers would find the proposed approach can be used very friendly involving no complex expressions with transparent and easy-to-handle calculation steps.

关键词： packed columns packing pressure drop flooding design principles