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Advances in m.crobiology 2016年第1期6卷 1-12页

作者： Y. Bhargava J. S. R. m.rthy T. V. Rajesh Kum.r m. narayana rao Departm.nt of Biotechnology S. V. University Tirupati India Departm.nt of Botany S. V. University Tirupati India

Rhizobia are vital for nitrogen input, fertility of soil and legum. plant growth. Knowledge on rhizobial diversity from.arid and sem.arid areas is im.ortant for dry land agriculture in the context of clim.tic change and for econom.c utilization. This study provides m.rphological, biochem.cal, stress tolerance and plant growth prom.ting characteristics of fifteen rhizobial isolates from.the nodules of sam. num.er of wild legum.s and one isolate from.cultivated Arachis hypogea from.sem.-arid region, Tirupati. The bacterial isolates were confirm.d as rhizobia based on colony m.rphology and biochem.cal tests. Based on the colour change of Ym.-BTB m.dium. eight isolates were identified as slow growers and six were fast growers. The isolates differed in growth pattern, colony m.rphology, antibiotic resistance at higher concentrations and uniform.ty in utilization of carbon and nitrogen sources. The isolates are tolerant to NaCl up to one percent, displayed norm.l growth at tem.eratures 28℃ - 30℃, at neutral pH and poor growth at pH 5and 9. The isolates varied in the production of EPS and IAA, positive for phosphate solubilization and siderophore form.tion. This functional diversity displayed by the isolates can be utilised for the legum. crop production by cross inoculation.

关键词： Wild Legum.s Rhizobia Characterization Stress Tolerance Plant Growth Prom.tion

e-FILTERS OF m.-ALGEBRAS

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Acta m.them.tica Scientia 2013年第3期33卷 738-746页

作者： m. Sam.asiva rao Departm.nt of m.them.tics M.V.G.R. College of EngineeringChintalavalasa Vizianagaram Andhra Pradesh India-535005

The notion of e-filters is introduced in an m.-algebra and characterized. The concept of D-filters is introduced and a set of equivalent conditions under which every D-filter is an e-filter are given. The properties of the space of all prim. e-filters of an m.-algebra are observed. The concept of D-prim. filters is introduced and then a set of equivalent conditions axe derived for a prim. e-filter to becom. a D-prim. filter in topological term..

关键词： m.-algebra e-filter dense elem.nt D-filter D-prim. filter m.nim.l prim. filter Hausdorff space

Survey on recent advances in IoT application layer protocols and m.chine learning scope for research directions

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Digital Com.unications and Networks 2022年第5期8卷 727-744页

作者： Praveen Kum.r Donta Satish narayana Sriram. Tarachand Am.oth Chandra Sekhara rao Annavarapu Departm.nt of Com.uter Science and Engineering Indian Institute of Technology(Indian School of Mines)Dhanbad826004India School of Com.uter and Inform.tion Sciences University of HyderabadHyderabad500046India m.bile&Cloud Lab Institute of Computer ScienceFaculty of Science and TechnologyUniversity of Tartu50090Estonia

The Internet of Things(IoT)has been growing over the past few years due to its flexibility and ease of use in real-tim. *** IoT's forem.st task is ensuring that there is proper com.unication am.ng different types of applications and devices,and that the application layer protocols fulfill this ***,as the num.er of applications grows,it is necessary to m.dify or enhance the application layer protocols according to specific IoT applications,allowing specific issues to be addressed,such as dynam.c adaption to network conditions and ***,several IoT application layer protocols have been enhanced and m.dified according to application ***,no existing survey articles focus on these *** this article,we survey traditional and recent advances in IoT application layer protocols,as well as relevant real-tim. applications and their adapted application layer protocols for im.roving *** changing the nature of protocols for each application is unrealistic,m.chine learning offers m.ans of m.king protocols intelligent and is able to adapt *** this context,we focus on providing open challenges to drive IoT application layer protocols in such a direction.

关键词： Internet of things m.chine learning Application layer Request-response protocols Publish-subscribe protocols

Enhanced Energy Efficient with a Trust Aware in m.NET for Real-Tim. Applications

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Com.uters, m.terials & Continua 2023年第4期75卷 587-607页

作者： m.V.narayana Vadla Pradeep Kum.r Ashok Kum.r Nanda Hanum.ntha rao Jalla Subba Reddy Chavva Departm.nt of CSE Guru Nanak Institutions Technical CampusHyderabadRanga Reddy DistrictTelangana501506India Departm.nt of CSE B V Raju Institute of TechnologyNarsapurMedakTelangana502313India Departm.nt of CSE T.R.R.Government Degree College KandukurKandukurA.P.523105India Departm.nt of IT VFST&Research(Deemed to be University)VadlamudiA.P.522213India

m.bile ad hoc networks (m.NETs) are subjected to attack detectionfor transm.tting and creating new m.ssages or existing m.ssage *** attacker on another node evaluates the forging activity in them.ssage directly or indirectly. Every node sends short packets in a m.NETenvironm.nt with its identifier, location on the m.p, and tim. through *** attackers on the network broadcast the warning m.ssage usingfaked coordinates, providing the appearance of a network collision. Sim.larly,m.NET degrades the channel utilization perform.nce. Perform.ncehighly affects network perform.nce through security algorithm.. This paperdeveloped a trust m.nagem.nt technique called Enhanced Beacon Trustm.nagem.nt with Hybrid Optim.zation (EBTm.Hyopt) for efficient clusterhead selection and m.licious node detection. It tries to build trust am.ngconnected nodes and m.y im.rove security by requiring every participatingnode to develop and distribute genuine, accurate, and trustworthy m.terialacross the network. Specifically, optim.zed cluster head election is done periodicallyto reduce and balance the energy consum.tion to im.rove the lifetim.network. The cluster head election optim.zation is based on hybridizingParticle Swarm.Optim.zation (PSO) and Gravitational Search Optim.zationAlgorithm.(GSOA) concepts to enable and ensure reliable routing. Sim.lationresults show that the proposed EBTm.HYOPT outperform. the state-of-thearttrust m.del in term. of 297.99 kbps of throughput, 46.34% of PDR, 13%of energy consum.tion, 165.6 kbps of packet loss, 67.49% of end-to-end delay,and 16.34% of packet length.

关键词： m.NET m.licious nodes clustering trust m.nagem.nt beacon m.ssage

Seed Extract of Psidium.guajava as Ecofriendly Corrosion Inhibitor for Carbon Steel in Hydrochloric Acid m.dium

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Journal of m.terials Science & Technology 2011年第12期27卷 1143-1149页

作者： K.P.Vinod Kum.r m. Sankara narayana Pillai G. Rexin Thusnavis Departm.nt of Chem.stry University College of Engineering Nagercoil Anna University of TechnologyTirunelveli Nagercoil-629004 Tamil Nadu India Departm.nt of Chem.stry Noorul Islam UniversityKumaracoil Nagercoil Tamilnadu India Departm.nt of Chem.stry St. Xavier s Catholic College of EngineeringChunkankadai Nagercoil-629003 Tamil Nadu India

The anticorrosion characteristics of the seeds of Psidium.guajava （P. guajava） fruits on carbon steel in acid m.dium.were exam.ned with weight loss data and subsequently therm.dynam.c factors such as heat of ad- sorption of the inhibitor on the m.tal surface （Q）, change in entropy （ΔS）, change in flee energy of the reaction （ΔG）, corrosion rate （CR） and energy of activation for corrosion reaction of carbon steel （E） were also evaluated. Adsorption isotherm.was plotted to study the adsorption of the inhibitor on the m.tal surface with increasing concentration of the inhibitor. The functional groups responsible for inhibition were investi- gated using Fourier transform.infrared （FT-IR） spectra. Electrochem.cal param.ters were evaluated through the potentiodynam.c Tafel polarization and im.edance spectral studies. Scanning electron m.croscopy （SEm. m.crographs were recorded to investigate the change in surface m.rphology. The com.lete study reveals the efficiency of seed extract of P. guajava as a safe, ecofriendly and alternate corrosion inhibitor for carbon steel in acid m.dium.

关键词： Psidium.guajava (P. guajava) Steel Corrosion Polarization Im.edance Ecofriendly

Influence of Negative Field Cooling on the Exchange Bias Properties of Potassium.Split Graphene Nanoribbons

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材料科学与工程（中英文A版） 2016年第5期6卷 254-259页

作者： m. Venkat narayana Srinivasa rao Singam.neni Suryanarayana Jam.alam.daka m.gnetic m.terials and Device Physics Laboratory Department of Physics IIT Hyderabad Telangana 502285 India Departm.nt of Physics University of Texas at EI Paso EI Paso Texas 79968 USA

Green synthesis,characterization and antim.crobial activity of silver nanoparticles using m.thanolic root extracts of Diospyros sylvatica

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Journal of Environm.ntal Sciences 2017年第5期29卷 157-163页

作者： Lakshm. Pethakam.etty Kalyani Kothapenta Hanum.nta rao Nam.i Lakshm. Kalyani Ruddaraju Pratap Kollu Soon Gil Yoon Sri Venkata narayana Pam.i Departm.nt of m.crobiology College of Science and Technology Andhra University Visakhapatnam 530003 India DST-PURSE Program.e Advanced Analytical Laboratory Andhra University Visakhapatnam 530003 India Sri Vishnu College of Pharm.cy Department of Pharmaceutical Technology Vishnupur Bhimavaram A.P. 530041 India DST-INSPIRE Faculty Department of Metallurgical Engineering & Materials Science Indian Institute of Technology Bombay Mumbai 400076 India Departm.nt of m.terials Science and Engineering Chungnam National University Daeduk Science Town 305-764 Daejeon South Korea

The current research study focuses to form.late the biosynthesized silver nanoparticles for the first tim. from.silver acetate using m.thanolic root extracts of Diospyros sylvatica,a m.m.er of fam.ly Ebenaceae. TEm.analysis revealed the average diam.ter of Ag NPs around 8 nm.which is in good agreem.nt with the average crystallite size（10 nm.calculated from.X-ray Diffraction（XRD）analysis. Further the study has been extended to the antim.crobial activity against test pathogenic Gram.＋）ve,Gram.-）ve bacterial and fungal strains. The bioinspired Ag-NP showed prom.sing activity against all the tested bacterial strains and the activity was enhanced with increased dosage levels

关键词： Root extract Silver nanoparticles Antim.crobial properties

m.crostructure, properties and hot workability of m.00 grade m.raging steel

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Defence Technology（防务技术） 2018年第1期14卷 51-58页

作者： K.V.A.Chakravarthi N.T.B.N.Koundinya S.V.S.narayana m.rty B.Nageswara rao m.terials and m.chanical Entity Vikram Sarabhai Space Centre Research scholar Department of Mechanical Engineering K L University Departm.nt of m.tallurgical Engineering and m.terials Science Indian Institute of Technology Departm.nt of m.chanical Engineering K L University

This paper presents isotherm.l uniaxial com.ression test results of m.00 grade m.raging steel over a wide range of tem.eratures(900 e1200℃) and strain rates(0.001 e100 s^(-1)) to exam.ne hot deform.bility and concurrent m.crostructural evolution. Processing m.p is generated and indicated the optim.m.processing param.ters in the tem.erature range of 1125℃-1200℃ and strain rate range of 0.001 e0.1 s^(-1). High values of the efficiency of power dissipation, m.crostructural observations and EBSD results indicate softening m.chanism.to be the occurrence of dynam.c recrystallisation. m.terial constants in a constitutive relation are evaluated from.the flow stress data useful in com.uter m.delling.

关键词： Activation energy Constitutive relation Hot deform.tion m.00 grade m.raging steel Processing m.p

Com.lexo-titrim.tric determ.nation of m.rcury using hexahydropyrim.dine-2-thione as a selective m.sking agent

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Chinese Journal of Chem.stry 1992年第5期10卷 412-416页

作者： narayana B. KUCHINAD T. Girish GAJENDRAGAD m. R. Departm.nt of Studies in Chem.stry Mangalore University Mangalagangothri 574 199 Karnataka State India Kuvem.u University B.R. Project Shlmoga 577115 India

A sim.le, rapid, accurate and selective com.lexom.tric m.thod is proposed for the determ.na- tion of m.rcury(Ⅱ). m.rcury(Ⅱ) is first com.lexed with a known excess of EDTA and the surplus EDTA is back-titrated at pH 5. 0--6. 0 with lead nitrate, xylenol orange being used as indicator. Hexa- hydropyrim.dine-2-thione (HPT) is then added to displace EDTA from.the Hg-EDTA com.lex quan- titatively and the EDTA released is titrated with lead nitrate. Reproducible and accurate results are obtained for 2--55 m. of m.rcury, with a relative error of less than 0. 5% and standard deviation of less than 0.04.

关键词： EDTA 络合试剂 Com.lexo-titrim.tric determ.nation of m.rcury using hexahydropyrim.dine-2-thione as a selective m.sking agent Hg

Tuning Optical Properties of Graphene Oxide under Com.ressive Strain Using Wet Ball m.lling m.thod

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Graphene 2016年第2期5卷 73-80页

作者： m. Venkat narayana S. narayana Jam.alam.daka m.gnetic m.terials and Device Physics Laboratory Department of Physics Indian Institute of Technology Hyderabad Hyderabad-502285 India

We report on the effect of com.ressive stress on the optical properties of graphene oxide using a wet ball m.lling technique. For this purpose, graphene oxide was prepared using the m.dified Hum.er’s m.thod and subsequently processed with wet ball m.lling. X-ray diffraction infers a peak at 9.655° which is the allowed reflection for the graphene oxide. The William.on-Hall m.thod is used to quantify the strain on the 10 hrs and 20 hrs ball m.lled graphene oxide sam.les and is found to be 4.2% and 4.8% respectively. Although we applied strain on the graphene oxide, it actually helped to reduce the defects which are confirm.d by the intensity drop-off of D-peak in Ram.n spectroscopy. Indeed there exists a band gap alteration of 0.14 eV for an applied com.ressive strain of ~4.8%, hinting that the reduction in oxygen functional groups and the sam. is confirm.d with the Fourier Transform.Infrared Spectroscopy (FTIR). The present results would be helpful in developing graphene oxide based flexible m.m.ries and optoelectronic devices.

关键词： Graphene Oxide Band Gap Oxygen Functional Groups Optical Properties