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Pyrolytic synthesis of graphene-encapsulated zero-valent iron nanoparticles supported on biochar for heavy metal removal

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Biochar 2022年第1期4卷 25-41页

作者： Tharindu N.karunaratne RMOshani Nayanathara Chanaka M.Navarathna Prashan M.Rodrigo rooban.v.k.g.thirumalai Charles U.Pittman Jr Yunsang kim Todd Mlsna Jilei Zhang Xuefeng Zhang Department of Sustainable Bioproducts Mississippi State UniversityMis-sissippi StateMS 39762USA. Department of Chemistry Mississippi State UniversityMississippi StateMS 39762USA. Institute for Imaging&Analytical Technologies Mississippi State UniversityMississippi StateMS 39762USA

Biochar(BC)-supported graphene-encapsulated zero-valent iron nanoparticle composites(BC-g@Fe0)are promising engineering nanocomposites that can be used to scavenge heavy metal from ***,the produc-tion of BC-g@Fe0 through carbothermal reduction using biomass as a carbon source remains challenging because of biomass pyrolysis ***,we examined two carbothermal reduction routes for preparing BC-g@Fe0 using bamboo as the carbon *** first route impregnated Fe ions(Fe^(2+)/^(3+))into unpyrolyzed bamboo parti-cles initially,followed by carbonization at 600-1000℃.This process produced BC-g@Fe0 dominated by iron carbide(Fe_(3)C),which led to low heavy metal removal efficiency(i.e.,Cu^(2+)capacity ofg^(−1)).In the second route,bamboo particles were pyrolyzed(600℃)to biochar first,followed by impregnating this biochar with Fe ions,and then carbonized at 600-1000℃.This route produces zero-valent iron nanoparticles,which resulted in high heavy metal removal capacities(i.e.,0.30,1.58,and 1.91 mmol g^(−1)for Pb^(2+),Cu^(2+),and Ag+,respectively).The effects of car-bonization temperature(600-1000℃),iron source(i.e.,iron nitrates,iron sulfate,ferrous chloride,and ferric chloride),and iron loading(5-40%)on the morphology,structure,and heavy metal ion aqueous uptake performance of BC-g@Fe0 were also *** study revealed the formation mechanisms of BC-g@Fe0 through biomass carbother-mal reduction,which could guide the application-oriented design of multifunctional iron-BC composites for water remediation.

关键词： Bamboo Biochar Carbothermal reduction Fe3C Metallic iron Heavy metal

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Frequency Domain Adaptive Learning Algorithm for Thoracic Electrical Bioimpedance Enhancement

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Computers, Materials & Continua 2022年第9期72卷 5713-5726页

作者： Md Zia Ur Rahman S.rooban P.Rohini M.v.S.Ramprasad Pradeep vinaik kodavanti Department of Electronics and Communication Engineering Koneru Lakshmaiah Education FoundationK L UniversityVaddeswaramGuntur522502Andhra PradeshIndia Department of Computer Science and Engineering Faculty of Science and TechnologyICFAI Foundation for Higher EducationHyderabad500082TelanganaIndia Department of Electrical Electronics and Communication EngineeringGITAM Institute of TechnologyGITAM Deemed to be UniversityVisakhapatnam530045Andhra PradeshIndia

The Thoracic Electrical Bioimpedance(TEB)helps to determine the stroke volume during cardiac *** measuring cardiac signal it is contaminated with *** commonly encountered artifacts are Baseline wander(BW)and Muscle artifact(MA),these are physiological and *** the nature of these artifacts is random,adaptive filtering is needed than conventional fixed coefficient filtering *** address this,a new block based adaptive learning scheme is proposed to remove artifacts from TEB signals in clinical *** proposed block least mean square(BLMS)algorithm is mathematically normalized with reference to data and *** normalization leads,block normalized LMS(BNLMS)and block error normalized LMS(BENLMS)*** adaptive artifact cancellers are developed in both time and frequency domains and applied on real TEB quantities contaminated with physiological *** ability of these techniques is measured by calculating signal to noise ratio improvement(SNRI),Excess Mean Square Error(EMSE),and Misadjustment(Mad).Among the considered algorithms,the frequency domain version of BENLMS algorithm removes the physiological artifacts effectively then the other counter ***,this adaptive artifact canceller is suitable for real time applications like wearable,remove health care monitoring units.

关键词： Adaptive learning artifact canceller block processing frequency domain thoracic electrical bioimpedance

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Truncation and Rounding-Based Scalable Approximate Multiplier Design for Computer Imaging Applications

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Computers, Materials & Continua 2022年第12期73卷 5169-5184页

作者： S.rooban A.Yamini Naga Ratnam M.v.S.Ramprasad N.Subbulakshmi R.Uma Mageswari Department of Electronics and Communication Engineering Koneru Lakshmaiah Education FoundationVaddeswaramGuntur522502Andhra PradeshIndia Department of EECE GITAM(Deemed to be University)VisakhapatnamAPIndia Department of Electronics and Communication Engineering Francis Xavier Engineering CollegeTirunelveli627003Tamil NaduIndia 4Department of Computer Science and Engineering Vardhaman College of EngineeringShamshabadHyderabad501218TelanganaIndia

Advanced technology used for arithmetic computing application,comprises greater number of approximatemultipliers and approximate *** and Rounding-based Scalable ApproximateMultiplier(TRSAM)distinguish a variety of modes based on height(h)and truncation(t)as TRSAM(h,t)in the *** TRSAM operation produces higher absolute error in Least Significant Bit(LSB)data shift unit.A new scalable approximate multiplier approach that uses truncation and rounding TRSAM(3,7)is proposed to increase themultiplier *** the help of foremost one bit architecture,the proposed scalable approximate multiplier approach reduces the partial *** proposed approximate TRSAM multiplier architecture gives better results in terms of area,delay,and *** accuracy of 95.2%and the energy utilization of 24.6 nJ is observed in the proposed multiplier *** proposed approach shows 0.11%,0.23%,and 0.24%less Mean Absolute Relative Error(MARE)when compared with the existing approach for the input of 8-bit,16-bit,and 32-bit *** also shows 0.13%,0.19%,and 0.2%less variance of Absolute Relative Error(vARE)when compared with the existing approach for the input of 8-bit,16-bit,and 32-bit *** proposed approach is implemented with Field-Programmable gate Array(FPgA)and shows the delay of 3.640,6.481,12.505,22.572,and 36.893 ns for the input of 8-bit,16-bit,32-bit,64-bit,and 128-bit *** proposed approach is applied in digital filters designwhich shows the Peak-Signal-to-NoiseRatio(PSNR)of 25.05 dB and Structural Similarity Index Measure(SSIM)of 0.98 with 393 pJ energy consumptions when used in image *** proposed approach is simulated with Xilinx and MATLAB and implemented with FPgA.

关键词： Truncation rounding based scalable approximate multiplier foremost one detector field programmable gate array peak-signal-to-noise-ratio structural similarity index measure

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Assessment of the Solid Waste Disposal Method during COvID-19 Period Using the ELECTRE Ⅲ Method in an Interval-valued q-Rung Orthopair Fuzzy Approach

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Computer Modeling in Engineering & Sciences 2022年第6期131卷 1229-1261页

作者： Samayan Narayanamoorthy Arumugam Anuja J.v.Brainy Thangaraj Manirathinam Subramaniam Pragathi thirumalai Nallasivan Parthasarathy Daekook kang Department of Mathematics Bharathiar UniversityCoimbatore641046India Department of Industrial and Management Engineering Inje UniversityGimhae50834Korea

As the quantity of garbage created every day rises,solid waste management has become the world’s most important *** a result,improper solid waste disposal and major sanitary issues develop,which are only detected after they have become *** to the system’s lockdown during the COvID-19 pandemic,this scenario became much more *** are at the stage to develop and execute effective waste management procedures,as well as long-term policies and forward-thinking programmes that can work even in the most adverse of *** incorporate major solid waste(organic and inorganic solid wastes)approaches that actually perform well in normal cases by reducing waste and environmental disasters;however,in such an uncertain scenario like the COvID-19 pandemic,the project automatically allows for a larger number of criteria,all of which are dealt with using fuzzy Multi-Criteria group Decision Making(MCgDM)*** ELECTRE Ⅲ(ELimination Et Choice Translating REality-Ⅲ)approach,which is a novel decision-making strategy for determining the best way to dispose and reduce garbage by combining traditional ELECTRE Ⅲ with an interval-valued q-rung orthopair fuzzy set(Ivq-ROFS),is described in detail in this *** confirm the efficacy of the recommended model,a numerical explanation is provided,as well as sensitivity and comparative ***,the findings encourage decision-makers in authorities to deliberate about the proposals before creating solid waste management policies.

关键词： MCDM organic waste inorganic waste ELECTREⅢ interval-valued q-rung orthopair fuzzy number

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Nanotechnology-based approach for safer enrichment of semen with best spermatozoa

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Journal of Animal Science and Biotechnology 2019年第2期10卷 390-401页

作者： Casey L.Durfey Sabrina E.Swistek Shengfa F.Liao Mark A.Crenshaw Henry J.Clemente rooban.v.k.g.thirumalai Christy S.Steadman Peter L.Ryan Scott T.Willard Jean M.Feugang Department of Animal and Dairy Sciences Mississippi State UniversityMississippi StateMSUSA Department of Biochemistry Molecular BiologyEntomology and Plant PathologyMississippi StateMSUSA Clemente Associates MadisonCTUSA Institute of Imaging and Analytic Technology(I2AT) Mississippi State UniversityMississippi StateMSUSA Department of Pathobiology and Population Medicine Biochemistry Mississippi State UniversityMississippi StateMSUSA.

Background: Advances in nanotechnology have permitted molecular-based targeting of cells through safe and biocompatible magnetic nanoparticles(MNP). Their use to detect and remove damaged spermatozoa from semen doses could be of great interest. Here, MNP were synthesized and tested for their ability to target apoptotic(annexin v) and acrosome-reacted(lectin) boar spermatozoa, for high-throughout retrieval in a magnetic field(nanoselection). The potential impacts of nanoselection on sperm functions and performance of offspring sired by sperm subjected to nanoselection were determined. Fresh harvested and extended boar semen was mixed with various amounts(0, 87.5, and 175 μg) of MNP-conjugates(Annexin v-MNP or Lectin-MNP) and incubated(10 to15 min) for 37 °C in Exp. 1. In Exp. 2, extended semen was mixed with optimal concentrations of MNP-conjugates and incubated(0, 30, 90, or 120 min). In Exp. 3, the synergistic effects of both MNP-conjugates(87.5 μg– 30 min)on spermatozoa was evaluated, followed by sperm fertility assessments through pregnancy of inseminated gilts and performance of neonatal offspring. Sperm motion, viability, and morphology characteristics were evaluated in all ***: Transmission electron microscopy, atomic force microscopy, and hyperspectral imaging techniques were used to confirm attachment of MNP-conjugates to damaged spermatozoa. The motility of nanoselected spermatozoa was improved(P viability of boar sperm, as assessed by the abundance of reactive oxygen species and the integrity of the acrosome, plasma membrane, and mitochondrial membrane was not different between nanoselected and control spermatozoa. The fertility of gilts inseminated with control or nanoselected spermatozoa, as well as growth and health of their offspring were not different between(P > 0.05).Conclusions: The findings revealed the benefit of magnetic nanoselection for high-throughput targeting of damaged sperm, for removal and rapid and effortles

关键词： Acrosome reaction Apoptosis Artificial insemination Boar Iron oxide nanoparticles Nanopurification Nanoselection Nanotechnology Reproduction Swine

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Investigating the surface integrity of aluminium based composites machined by EDM

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Defence Technology（防务技术） 2019年第3期15卷 338-343页

作者： S.Suresh kumar M.Uthayakumar S.thirumalai kumaran Temel varol Aykut Canakci Faculty of Mechanical Engineering Kalasalingam University Krishnankoil 626126 India Materials and Metallurgy Department Karadeniz Technical University Turkey

In the present work, the surface characteristics of Electrical Discharge Machined (EDM) Al (6351)eSiC and Al (6351)eSiCeB4C composites are investigated. The composites are prepared by employing the conventional stir casting technique, as it can produce better particle dispersion in the matrix. The detailed experimental study is performed on the composites by varying current (I), duty factor (t), pulse on time (Ton), and the gap voltage (v) in order to analyze the Heat Affected Zone (HAZ) formed in the sub surface and the average crater diameter formed on the machined surface of the composites as an output function. The formation of recast layers, presence of bubbles and the surface texture of the composites at various machining conditions are observed. The results show that the increased Metal Removal Rate (MRR) increases the depth of HAZ and the average crater diameter on the machined area. Further, the addition of B4C particles to the composite produces more surface defect than the AleSiC composite.

关键词： Composites EDM Surface Crater HAZ

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A Review on Stabilization of Expansive Soil Using Industrial Solid Wastes

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Engineering（科研） 2017年第12期9卷 1008-1017页

作者： R. thirumalai S. Suresh Babu v. Naveennayak R. Nirmal g. Lokesh Department of Civil Engineering Adhiyamaan College of Engineering Hosur India

In developing countries like India, Industrialization is rising rapidly, and also?a great paucity of land is there, the demand for exploitation of industrial?wastes?which coming from industries is increasing. From geotechnical perspective,?fly ash, granite and quarry waste, cement kiln dust, silica fume, rice husk etc.?are the waste materials?which?have effectual features requisites by an excellent soil stabilization admixture. Stabilization using solid wastes is one of the different?methods of treatment, to improve the engineering properties and make it?suitable for construction. This paper briefs about the recent trends in stabilization of expansive soil using industrial waste (granite and quarry waste, cement kiln?dust, silica fume, rice husk) as stabilizers for decreasing the environmental?hazards.

关键词： Expansive Soils Soil Stabilization Fly Ash granite and Quarry Waste Cement kiln Dust Silica Fume Rice Husk

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Design of QoS Aware Routing Protocol for IoT Assisted Clustered WSN

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Computers, Materials & Continua 2022年第5期71卷 3785-3801页

作者： Ashit kumar Dutta S.Srinivasan Bobbili Prasada Rao B.Hemalatha Irina v.Pustokhina Denis A.Pustokhin gyanendra Prasad Joshi Department of Computer Science and Information Systems College of Applied SciencesAlmaarefa UniversityRiyadh13713Kingdom of Saudi Arabia Saveetha School of Engineering Saveetha Institute of Medical and Technical SciencesSaveetha NagarThandalamChennai602105India Department of Electrical and Electronics Engineering Vignan’s Institute of Information TechnologyVisakhapatnam530049India Department of Electronics and Communication Engineering Thirumalai Engineering CollegeKancheepuram631551India Department of Entrepreneurship and Logistics Plekhanov Russian University of Economics117997MoscowRussia Department of Logistics State University of Management109542MoscowRussia Department of Computer Science and Engineering Sejong UniversitySeoul05006Korea

In current days,the domain of Internet of Things(IoT)and Wireless Sensor Networks(WSN)are combined for enhancing the sensor related data transmission in the forthcoming networking *** and routing techniques are treated as the effective methods highly used to attain reduced energy consumption and lengthen the lifetime of the WSN assisted IoT *** this view,this paper presents an Ensemble of Metaheuristic Optimization based QoS aware Clustering with Multihop Routing(EMOQoSCMR)Protocol for IoT assisted *** proposed EMO-QoSCMR protocol aims to achieve QoS parameters such as energy,throughput,delay,and *** proposed model involves two stage processes namely clustering and ***,the EMO-QoSCMR protocol involves crossentropy rain optimization algorithm based clustering(CEROAC)technique to select an optimal set of cluster heads(CHs)and construct ***,oppositional chaos game optimization based routing(OCgOR)technique is employed for the optimal set of routes in the IoT assisted *** proposed model derives a fitness function based on the parameters involved in the IoT nodes such as residual energy,distance to sink node,*** proposed EMOQoSCMR technique has resulted to an enhanced NAN of 64 nodes whereas the LEACH,PSO-ECHS,E-OEERP,and iCSHS methods have resulted in a lesser NAN of 2,10,42,and 51 *** performance of the presented protocol has been evaluated interms of energy efficiency and network lifetime.

关键词： Internet of things wireless sensor networks clustering routing metaheuristics cluster head selection QoS parameters

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