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Synergism Among VA Mycorrhiza, Phosphate Solubilizing Bacteria and Rhizobium for Symbiosis with Blackgram (Vigna mungo L.) Under Field Conditions

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Pedosphere 2001年第4期11卷 327-332页

作者： A．TOMAR n．kumar 等 DepartmentofSoilScience CollegeofAgricultureG.B.PantUniversityofAgricultureandTechnologyPantnagar－263145（Indina） DepartmentofSoilScience CollegeofAgricultureG.B.PantUniversityofAgricultureandTechno

A field experiment was conducted at the G.B. Pant University Research Station, Ujhani (U.P.) in rainy (Kharif) season of the year 1994-1995 to study the effect of Rhizobium, VAM (vesicular arbuscular myc- orrhiza) and PSB (phosphate solubilizing bacteria) inoculation, with and without P, on blackgram (Vigna mungo L.) seed yield. Phosphorus application in soil with medium P content (5.4 mg kg～1) increased nodu- lation, grain yield, n and P in plant and grain over no phosphorus control. Forty kilograms of P-2O-5 each hactare recorded an increase of 20.6 % in nodule dry weight, significant increases of 0.35 g kg～(-1) in n con- centration and 1.28 g kg～(-1) in P concentration of plant over 20 kg P-2O-5 ha～(-1). Similar significant increases of 0.59 g kg～(-l) in grain yield and 0.54 and 0.23 g kg～(-1) in n and P concentrations of the grain, respectively, over 20 kg P-2O-5 ha～(-1) were also obtained with higher dose. Inoculation of Rhizobium ＋ VAM ＋ PSB at all the stages of plant growth recorded maximum increases in all the parameters studied. Dual inoculation of Rhizobium with either VAM or PSB was generally significant in the effect and better than that of VAM ＋ PSB, however, P accumulation in plant and grain was more with VAM ＋ PSB. Among single inocula tions, Rhizobium gave highest and 21.0 % more nodule number, 34.7 % more nodule dry mass, 0.73 g kg～(-1) more n in grain and 4.2 % higher grain yield over PSB. PSB, however, registered significant increases in P concentration in plant and grain over VAM and Rhizobium.

关键词： phosphorus PSB Rhibozium synergism VAM

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The nonlinear optical properties of a magneto-exciton in a strained Ga_(0.2)In_(0.8)As/GaAs quantum dot

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Chinese Physics B 2013年第10期22卷 479-485页

作者： n.R.Senthil kumar A.John Peter Chang Kyoo Yoo Department of Physics SBM College of Engineering and Technology Department of Physics Govt.Arts CollegeMelur-625 106MaduraiIndia Center for Environmental Studies/Green Energy Center Deptartment of Environmental Science and EngineeringCollege of EngineeringKyung Hee UniversitySeocheon-dong 1Giheung-guYongin-SiGyeonggi-Do446-701South Korea

The magnetic field-dependent heavy hole excitonic states in a strained ***/GaAs quantum dot are investi- gated by taking into account the anisotropy, non-parabolicity of the conduction band, and the geometrical confinement. The strained quantum dot is considered as a parabolic dot of InAs embedded in a GaAs barrier material. The dependence of the effective excitonic g-factor as a function of dot radius and the magnetic field strength is numerically measured. The interband optical transition energy as a function of geometrical confinement is computed in the presence of a mag- netic field. The magnetic field-dependent oscillator strength of interband transition under the geometrical confinement is studied. The exchange enhancements as a function of dot radius are observed for various magnetic field strengths in a strained ***/GaAs quantum dot. Heavy hole excitonic absorption spectra, the changes in refractive index, and the third-order susceptibility of third-order harmonic generation are investigated in the Gao.2Ino.8As/GaAs quantum dot. The result shows that the effect of magnetic field strength is more strongly dependent on the nonlinear optical property in a low-dimensional semiconductor system.

关键词： oscillator strength exciton quantum dot

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Species Diversity and Population Status of Threatened Plants in Different Landscape Elements of the Rohtang Pass,Western Himalaya

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Journal of Mountain Science 2008年第1期5卷 73-83页

作者： K.n.Singh Gopichand Amit kumar Brij Lal n.P.Todaria Biodiversity Division Institute of Himalayan Bioresource Technology (CSIR)PalampurHimachal Pradesh176 061India Forestry department HNB Garhwal UniversitySrinagarUttarakhandIndia

This paper highlights the quantitative estimates of plant species diversity and ecosystems of the Rohtang Pass,which is one of the most preferred visiting spots by tourists in Himachal Pradesh (H.P.),India. In spite of high pressure of anthropogenic activities,the Rohtang Pass still harbours a variety of flowering plants with economic value,including various medicinal herbs. In order to observe species diversity in different landscape elements (LSEs),ground surveys were conducted in nine unique LSEs within the elevation range between 3624 m and 4332 m. Plant community structure in each LSE was studied using stratified random sampling where a total 56 quadrats of 1 m2 in size for herbs and 7 quadrats of 25 m2 for shrubs were made. Of the total 50 plant species belonging to 15 families recorded in different random quadrats,24 species were found of medicinal value. Maximum species richness (18) and value of Shannon diversity (H'=2.2648) were observed on northeast-facing slope in Picrorhiza kurrooa dominated LSE in moist area,followed by Rheum emodi LSE (species richness = 17 and H' = 2.4141) distributed on south-facing slope. Maximum values of species richness and Shannon diversity in Rheum emodi LSE were observed between 8 ～ 12 and 1.4797 ～ 2.1911,respectively. Rhododendron anthopogon dominated LSE on northwest-facing slope was found least diverse in terms of species richness where the Simpson index of dominance (D) was 0.4205. The species were equal in abundance in P. kurrooa LSE on east-facing slope and Pleurospermum candollii LSE on north-facing slope,showing the maximum similarity in terms of species distribution between the two LSEs. Low turnover of species across common LSEs gives an idea regarding their limited distribution. Five species of threatened category according to the IUCn criteria were observed in seven LSEs. The largest population of threatened medicinal plants was recorded on northeast and northwest-facing slopes where population density of Bergenia

关键词： Species diversity threatened plant landscape Rohtang Pass western Himalaya

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Impact of metabolic dysfunction-associated steatotic liver disease on COVID-19 hospitalizations:A propensity-matched analysis of the United States

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World Journal of Virology 2024年第1期13卷 51-60页

作者： Abdullah Sohail Hassam Ali Pratik Patel Subanandhini Subramanium Dushyant Singh Dahiya Amir H Sohail Manesh kumar Gangwani Sanjaya K Satapathy Department of Internal Medicine University of Iowa Roy J and Lucille A Carver College of MedicineIowaIA 52242United States Division of Gastroenterology and Hepatology East Carolina University/Brody School of MedicineGreenvilleNC 27858United States Department of Gastroenterology Mather Hospital/Hofstra University Zucker School of MedicineNY11777United States Department of Internal Medicine East Carolina University Brody School of MedicineGreenvilleNC 27834United States Division of Gastroenterology Hepatology&MotilityThe University of Kansas School of MedicineKansas CityKS 66160United States Department of Surgery University of New MexicoAlbuquerqueNM 87106United States Department of Internal Medicine The University of ToledoToledoOH 43606United States Section on Gastroenterology and Hepatology North Shore University Hospital and Long Island Jewish Medical CenterManhassetNY 11030United States

BACKGROUnD Metabolic dysfunction-associated steatotic liver disease(MASLD),formally known as nonalcoholic fatty liver disease,is the most common chronic liver disease in the United *** with MASLD have been reported to be at a higher risk of developing severe coronavirus disease 2019(COVID-19)and ***,most studies are single-center studies,and nationwide data in the AIM To study the influence of MASLD on COVID-19 hospitalizations during the initial phase of the *** We retrospectively analyzed the 2020 national Inpatient Sample(nIS)database to identify primary COVID-19 hospitalizations based on an underlying diagnosis of MASLD.A matched comparison cohort of COVID-19 hospit-alizations without MASLD was identified from nIS after 1:n propensity score matching based on gender,race,and comorbidities,including hypertension,heart failure,diabetes,and *** primary outcomes included inpatient mortality,length of stay,and hospitalization *** outcomes included the prevalence of systemic *** A total of 2210 hospitalizations with MASLD were matched to 2210 hospitalizations without MASLD,with a good comorbidity ***,there was a higher prevalence of severe disease with more intensive care unit admissions(9.5%vs 7.2%,P=0.007),mechanical ventilation(7.2%vs 5.7%,P=0.03),and septic shock(5.2%vs 2.7%,Pn the MASLD cohort than in the non-MASLD ***,there was no difference in mortality(8.6%vs 10%,P=0.49),length of stay(5 d vs 5 d,P=0.25),and hospitalization costs(42081.5$vs 38614$,P=0.15)between the MASLD and non-MASLD *** The presence of MAFLD with or without liver cirrhosis was not associated with increased mortality in COVID-19 hospitalizations;however,there was an increased incidence of severe COVID-19 *** data(2020)predates the availability of COVID-19 vaccines,and many MASLD patients have since been *** will be interesting to see if these trends are

关键词： COVID-19 Metabolic dysfunction-associated steatotic liver disease Prevalence Hospital charges Inpatient resource utilization

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Development,validation,and transportability of several machine-learned,non-exercise-based VO_(2max)prediction models for older adults

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Journal of Sport and Health Science 2024年第5期13卷 611-620页

作者： Benjamin T.Schumacher Michael J.LaMonte Andrea Z.LaCroix Eleanor M.Simonsick Steven P.Hooker Humberto Parada Jr. John Bellettiere Arun kumar Herbert Wertheim School of Public Health and Human Longevity Science University of California San DiegoLa JollaCA 92093USA Department of Epidemiology and Environmental Health School of Public Health and Health ProfessionsUniversity at BuffaloState University of New YorkBuffaloNY 14214USA Translational Gerontology Branch Intramural Research ProgramNational Institute on AgingNational Institutes of HealthBaltimoreMD 21225USA College of Health and Human Services San Diego State UniversitySan DiegoCA 92182USA Division of Epidemiology and Biostatistics School of Public HealthSan Diego State UniversitySan DiegoCA 92182USA University of California San Diego Moores Cancer Center La JollaCA 92093USA Computer Science and Engineering and Halicioglu Data Science Institute University of California San DiegoLa JollaCA 92093USA

Background:There exist few maximal oxygen uptake(VO_(2max))non-exercise-based prediction equations,fewer using machine learning(ML),and none specifically for older *** direct measurement of VO_(2max)is infeasible in large epidemiologic cohort studies,we sought to develop,validate,compare,and assess the transportability of several ML VO_(2max)prediction ***:The Baltimore Longitudinal Study of Aging(BLSA)participants with valid VO2_(max)tests were included(n=1080).Least absolute shrinkage and selection operator,linear-and tree-boosted extreme gradient boosting,random forest,and support vector machine(SVM)algorithms were trained to predict VO_(2max)*** developed these algorithms for:(a)the overall BLSA,(b)by sex,(c)using all BLSA variables,and(d)variables common in aging ***,we quantified the associations between measured and predicted VO_(2max)and ***:The age was 69.0±10.4 years(mean±SD)and the measured VO_(2max)was 21.6±5.9 mL/kg/*** absolute shrinkage and selection operator,linear-and tree-boosted extreme gradient boosting,random forest,and support vector machine yielded root mean squared errors of 3.4 mL/kg/min,3.6 mL/kg/min,3.4 mL/kg/min,3.6 mL/kg/min,and 3.5 mL/kg/min,*** quartiles of measured VO_(2max)showed an inverse gradient in mortality *** VO_(2max)variables yielded similar effect estimates but were not robust to ***:Measured VO_(2max)is a strong predictor of *** ML can improve the accuracy of prediction as compared to simpler approaches but estimates of association with mortality remain sensitive to *** studies should seek to reproduce these results so that VO_(2max),an important vital sign,can be more broadly studied as a modifiable target for promoting functional resiliency and healthy aging.

关键词： Cardiorespiratory fitness Prediction algorithms Epidemiology Mortality

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Feeder and post Deccan Trap dyke activities in the northern slope of the Satpura Mountain： Evidence from new 40Ar-39Ar ages

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Geoscience Frontiers 2017年第3期8卷 483-492页

作者： J.P.Shrivastava R.kumar n.Rani Department of Geology University of Delhi

We present new 40Ar-39Ar plagioclase crystallization ages from the dykes exposed at the northern slope of the Satpura Mountain range near Betul-Jabalpur-Pachmarhi area, - 800 km nE of the Western Ghats escarpment. Among the two plateau ages, the first age of 66.56 ± 0.42 Ma from a dyke near Mohpani village represents its crystallization age which is either slightly older or contemporaneous with the nearby Mandla lava flows （63-65 Ma）. We suggest that the Mohpani dyke might be one of the feeders for the surrounding lava flows as these lavas are significantly younger than the majority of the main Deccan lavas of the Western Ghats （66.38-65.54 Ma）. The second age of 56.95 -- 1.08 Ma comes from a younger dyke near Olini village which cuts across the lava flows of the area. The age correlates well with the Mandla lavas which are chemically similar to the uppermost Poladpur, Ambenali and Mahabaleshwar Formation lavas of SW Deccan. Our study shows that the dyke activities occurred in two phases, with the second one representing the terminal stage.

关键词： 40Aro39Ar ages Deccan dykes Betul-Jabalpur-Pachmarhi area narmada-Tapi dyke system

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Smart-Grid Monitoring using IoT with Modified Lagranges Key Based Data Transmission

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Intelligent Automation & Soft Computing 2023年第3期35卷 2875-2892页

作者： C.K.Morarji n.Sathish kumar Department of Electronics and Communication Engineering Rohini College of Engineering and TechnologyKanyakumariTamilnadu629401India Department of Electronics and Communication Engineering Sri Ramakrishna Engineering CollegeCoimbatoreTamilnadu641022India

One of the recent advancements in the electrical power systems is the smart-grid *** the effective functioning of the smart grid,the process like monitoring and controlling have to be given *** this paper,the Wireless Sensor network(WSn)is utilized for tracking the power in smart grid *** smart grid is used to produce the electricity and it is connected with the sensor to transmit or receive the *** data is transmitted quickly by using the Probabilistic neural network(Pnn),which aids in identifying the shortest path of the *** transmitting the data from the smart grid to the(Internet of Things)IoT web page,it is secured by introducing the secret keys between the neighbouring nodes through the process of *** this method,the combination of Lagrange’s theorem and the Location Based Key(LBK)management is used for better security *** approach deli-vers optimal performance in terms of security,throughput,packet loss and delay,which are comparatively better than the existing methods.

关键词： WSn smart grid Lagrange LBK Pnn PV system IoT SCADA

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Dynamic behavior of sandwich beams with different compositions of magnetorheological fluid core

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International Journal of Smart and nano Materials 2021年第1期12卷 88-106页

作者： Subash Acharya Vipin J Allien Puneet n P Hemantha kumar Department of Mechanical Engineering NITK SurathkalMangaloreKarnatakaIndia

Magnetorheological fluid(MRF)sandwich beams belong to a class of adaptive beams that consists of MRF sandwiched between two or more face layers and have a great prospective for use in semi-active control of beam vibrations due to their superior vibration suppression *** composition of MRF has a strong influence on the MRF properties and hence affects the vibration characteristics of the *** this work,six MRF samples(MRFs)composed of combination of two particle sizes and three weight fractions of carbonyl iron pow-der(CIP)were prepared and their viscoelastic properties were *** MRFs were used to fabricate different MRF core sandwich ***,a sandwich beam with commer-cially available MRF 132DG fluid as core was *** modal parameters of the cantilever MRF sandwich beams were determined at different magnetic ***,sinusoidal sweep excitation tests were performed on these beams at different magnetic fields to investigate their vibration suppres-sion *** having larger particle size and higher weight fraction of CIP resulted in higher damping ratio and vibration ***,optimal particle size and weight fraction of CIP were determined based on the maximization of damping ratio and minimization of weight of MRF.

关键词： Smart materials adaptive sandwich beam damping ratio vibration suppression complex shear modulus

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A two-dimensional analytical-model-based comparative threshold performance analysis of SOI-SOn MOSFETs

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Journal of Semiconductors 2011年第10期32卷 32-38页

作者： Sanjoy Deb Saptarsi Ghosh n Basanta Singh A K De Subir kumar Sarkar Department of Electronics&Telecommunication Engineering Jadavpur University Department of Electronics&Communication Engineering Manipur Institute of Technology Department of Electronics&Communication Engineering National Institute of Technology

A generalized threshold voltage model based on two-dimensional Poisson analysis has been developed for SOI/SOn *** short channel field effects,such as fringing fields,junction-induced lateral fields and substrate fields,are carefully investigated,and the related drain-induced barrier-lowering effects are incorporated in the analytical threshold voltage *** analytical model-based simulation,the threshold voltage roll-off and subthreshold slope for both structures are compared for different operational and structural parameter *** of analytical simulation are compared with the results of the ATLAS 2D physics-based simulator for verification of the analytical *** performance of an SOn MOSFET is found to be significantly different from a conventional SOI *** short channel effects are found to be reduced in an SOn,thereby resulting in a lower threshold voltage roll-off and a smaller subthreshold *** type of analysis is quite useful to figure out the performance improvement of SOn over SOI structures for next generation short channel MOS devices.

关键词： silicon-on-insulator silicon-on-nothing Poisson's equation short channel effects threshold voltage roll-off subthreshold slope

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SULPHOnATED POLY ETHER ETHER KETOnE/POLYVInYL ALCOHOL/PHOSPHOTUnGSTIC ACID COMPOSITE MEMBRAnES FOR PEM FUEL CELLS

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Chinese Journal of Polymer Science 2009年第2期27卷 157-164页

作者： S.Guhan n.Arun kumar D.Sangeetha Department of Chemistry Anna University

Composite membranes with polyvinyl alcohol (PVA),sulphonated poly ether ether ketone (SPEEK) and phosphotungstic acid (PWA) were prepared using solvent casting *** proton conductivities of such membranes were found to be in the order of 10^(-3) S/cm in the fully hydrated condition at room temperature as measured by impedance *** crystalline properties were studied by X-ray diffraction *** thermal properties were determined by TGA and DSC *** tensile strength and perce...

关键词： PVA SPEEK PWA Conductivity Composite membranes.

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