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Optim.zing calcination of coal by-products for m.xim.zing REE leaching recovery and m.nim.zing Al,Ca,and Fe contam.nation

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Journal of Rare Earths 2024年第7期42卷 1354-1365,I0006页

作者： Tushar Gupta ahmad Nawab Rick Honaker m. m.terials m.untain Pass m.ne 67750 Bailey RoadMountain PassCA92366USA Departm.nt of m.ning Engineering University of KentuckyLexingtonKY40506USA

High-tem.erature calcination is effective in im.roving the leaching characteristics of rare earth elem.nts(REEs)from.conventional REE-bearing m.nerals by transform.ng them.into m.re leachable ***,the recovery of contam.nants such as Al,Fe,and Ca also increases *** objective of the study was to m.xim.ze the REE extraction while m.nim.zing the concentration of contam.nant ions(Al,Ca,and Fe)in the leach *** density fractions of the coarse refuse from.the Baker and Fire Clay seam.coal refuse were pulverized to a top size of 180μm.and used as a feedstock for the *** the sam.les generated from.therm.l treatm.nt were leached at 1%(w/v)using 1.2 m.l/L sulfuric acid at 75℃ for 2 *** results from.a param.tric program.based on a Box-Behnken design were used for m.deling and optim.zation of three operating param.ters associated with the lab-scale calcination *** param.ters included tem.erature(400-800℃),ram. rate(2-10℃/m.n)and holding tim.(0-120 m.n).It was determ.ned that the calcination tem.erature was the m.st significant param.ter influencing REE *** m.jority of the heavy rare earth elem.nts(HREEs)were found to be present in an insoluble form.in the calcination products and were m.rginally affected by therm.l treatm.nt.A strong correlation between light rare earth elem.nts recovery(LREEs)and Al suggested a possible association with *** optim.m.operating conditions for high REE recovery with com.aratively lower contam.nant concentration for 1.6 specific gravity float and 2.2 sink fractions of Baker and Fire Clay seam.m.terial were determ.ned to be at 776,800℃ and 407,800℃,calcining tem.eratures,respectively.A higher optim.m.tem.erature of 1.6 float fraction of Baker seam.relative to Fire Clay seam.m.terial was due to elevated pyrite concentration in Baker seam.*** treatm.nt at 400℃ converted pyrite into a soluble interm.dium.iron oxide,resulting in a high Fe content in the ***

关键词： Calcination Optim.zation Rare earth elem.nts Coal refuse

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Applying the Protective m.-Co-La_(2)O_(3)Coating on Crofer 22 APU Ferritic Stainless Steel Used as Solid Oxide Fuel Cell Interconnects

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Acta m.tallurgica Sinica(English Letters) 2024年第5期37卷 872-888页

作者： Farhad m.hsenifar Hadi Ebrahim.far ahmad Irannejad Departm.nt of m.terials Engineering and m.tallurgy Faculty of EngineeringShahid Bahonar University of KermanKermanIran m.chanical Engineering Departm.nt Faculty of EngineeringHigher Education Complex of Bam76615-314BamIran Departm.nt of m.terials Engineering Faculty of Mechanical and Materials EngineeringGraduate University of Advanced TechnologyKerman ***Iran

This research studies the effect of m.-Co-La_(2)O_(3) coating synthesized by the electrodeposition m.thod on the oxidation resistance and electrical conductivity of the Crofer 22 APU stainless steel interconnect plates in solid oxide fuel *** test sam.les were characterized by a field em.ssion scanning electron m.croscope(FESEm.equipped with energy dispersive spectroscopy(EDS),X-ray diffraction(XRD),and X-ray photoelectron spectroscopy(XPS).The oxidation kinetics of the coated and uncoated sam.les were studied by tracking their weight changes over tim. at 800°C,showing that the oxidation m.chanism.for all sam.les follows the parabolic *** oxidation rate constant(k_(p))values of the coated sam.le com.ared with that of the uncoated one indicated a reduction in the oxidation rate of the steel substrate in the presence of the m.-Co-La_(2)O_(3) *** exam.nation of the cross-section of different sam.les after the isotherm.l oxidation for 500 h at 800°C exhibited that applying the com.osite coating leads to a decrease in the thickness of the chrom.a layer form.d on the steel ***,under these conditions,the area-specific resistance(ASR)of the coated sam.le(13.11 m.cm.(2))is significantly lower than that of the uncoated one(41.45 m.cm.(2)).

关键词： Area specific resistance Oxidation Fuel cell Com.osite coating

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Developm.nt of sustainable therm.l insulation based on bio-polyester filled with date pits

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Journal of Bioresources and Bioproducts 2024年第1期9卷 74-89页

作者： Am.l m.hem.Thom.s Teklebrhan Evenezer Bokuretsion Basim.abu-Jdayil Chem.cal&Petroleum.Engineering Departm.nt United Arab Emirates UniversityPO Box 15551United Arab Emirates National Water and Energy Center United Arab Emirates UniversityPO Box 15551United Arab Emirates

Date palm.pit(DPP)-filled poly(-hydroxybutyrate)(PHB)com.osites were prepared,evaluated,and characterized to determ.ne their therm.l insulation *** conductivity values ranged between 0.086 and 0.100 W/(m.K).At a m.xim.m.filler concentration(50%(w)),the specific heat capacity and therm.l diffusivity were 1183 J/(kg·K)and 0.0689 m.^(2)/s,*** DPP increased the therm.l stability,and the highest com.ressive strength obtained was 80 m.a at 30%filler *** PHB-DPP com.osites exhibited prom.sing water absorption(less than 6%)and tensile strength(6-14 m.a).Date-pit-based PHB com.osites could be used in sustainable building engineering and cleaner production.

关键词： Green construction m.terial Sustainable therm.l insulator Date pit Polyhydroxybutyrate

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Com.on coupled fixed point theorem.for two pairs com.atible and sub-sequentially continuous m.pping

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Journal of Ocean Engineering and Science 2024年第4期9卷 401-407页

作者： H.m.abu-Donia m.na S.Bakry H.A.Atia Om.ia m.A.Khater Raghda A.m.Attia Departm.nt of m.them.tics Faculty of ScienceZagazig UniversityZagazigEgypt Departm.nt of m.them.tics Faculty of ScienceTanta UniversityTantaEgypt Departm.nt of Basic Science Zagazig Higher Institute of Engineering and TechnologyZagazigEgypt Departm.nt of Basic Science Higher Technological Institute 10th of Ramadan CityEl Sharqia 44634Egypt

This study establishes a com.on coupled fixed point for two pairs of com.atible and sequentially continuous m.ppings in the intuitionistic fuzzy m.tric space that satisfy theφ-contractive *** basic definitions and theorem. have been used from.som. recent scientific papers about the binary operator,t-norm.t-conorm.intuitionistic fuzzy m.tric space,and com.atible m.pping for reaching to the paper’s purpose.

关键词： Intuitionistic fuzzy m.tric space φ-contractive m.pping Com.atible m.ppings Couple fixed point

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Security and Privacy Challenges in SDN-Enabled IoT System.: Causes, Proposed Solutions,and Future Directions

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Com.uters, m.terials & Continua 2024年第8期80卷 2511-2533页

作者： ahmad Rahdari ahmad Jalili m.hdi Esnaashari m.hdi Gheisari Alisa A.Vorobeva Zhaoxi Fang Panjun Sun Viktoriia m.Korzhuk Ilya Popov Zongda Wu Ham.d Tahaei Institute of Artificial Intelligence Shaoxing UniversityShaoxing312000China Departm.nt of Com.uter Engineering Gonbad Kavous UniversityGonbad-e Kavus49717-99151Iran Faculty of Com.uter Engineering K.N.Toosi University of TechnologyTehran196976-4499Iran Departm.nt of Com.uter Science and Engineering Saveetha School of EngineeringSaveetha Institute of Medical and Technical SciencesChennai602105India Secure Inform.tion Technologies Departm.nt National Research University ITMOSt.Petersburg197101Russia School of Electrical and Com.uter Engineering Shiraz UniversityShiraz71946–84334Iran Departm.nt of Com.uter Science and Engineering Islamic Azad UniversityDamavand***Iran Departm.nt of R&D Shenzhen BKD Co.Ltd.Shenzhen518000China

Software-Defined Networking(SDN)represents a significant paradigm.shift in network architecture,separating network logic from.the underlying forwarding devices to enhance flexibility and centralize ***-rently,the Internet of Things(IoT)connects num.rous devices to the Internet,enabling autonom.us interactions with m.nim.l hum.n ***,im.lem.nting and m.naging an SDN-IoT system.is inherently com.lex,particularly for those with lim.ted resources,as the dynam.c and distributed nature of IoT infrastructures creates security and privacy challenges during SDN *** findings of this study underscore the prim.ry security and privacy challenges across application,control,and data planes.A com.rehensive review evaluates the root causes of these challenges and the defense techniques em.loyed in prior works to establish sufficient secrecy and privacy *** investigations have explored cutting-edge m.thods,such as leveraging blockchain for transaction recording to enhance security and privacy,along with applying m.chine learning and deep learning approaches to identify and m.tigate the im.acts of Denial of Service(DoS)and Distributed DoS(DDoS)***,the analysis indicates that encryption and hashing techniques are prevalent in the data plane,whereas access control and certificate authorization are prom.nently considered in the control plane,and authentication is com.only em.loyed within the application ***,this paper outlines future directions,offering insights into potential strategies and technological advancem.nts aim.d at fostering a m.re secure and privacy-conscious SDN-based IoT ecosystem.

关键词： Security privacy-preserving software-defined network internet of things

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Explainable AI-Based DDoS Attacks Classification Using Deep Transfer Learning

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Com.uters, m.terials & Continua 2024年第9期80卷 3785-3802页

作者： ahmad Alzu’bi Am.ad Albashayreh Abdelrahm.n abuarqoub m.i A.m.Alfawair Departm.nt of Com.uter Science Jordan University of Science and TechnologyIrbid22110Jordan Departm.nt of Com.uter Science The University of JordanAmman11942Jordan Cardiff School of Technologies Cardiff Metropolitan UniversityCardiffCF52YBUK Prince Abdullah bin Ghazi Faculty of Inform.tion and Com.unication Technology Al-Balqa Applied UniversitySalt19117Jordan

In the era of the Internet of Things(IoT),the proliferation of connected devices has raised security concerns,increasing the risk of intrusions into diverse *** the convenience and efficiency offered by IoT technology,the growing num.er of IoT devices escalates the likelihood of attacks,em.hasizing the need for robust security tools to autom.tically detect and explain *** paper introduces a deep learning m.thodology for detecting and classifying distributed denial of service(DDoS)attacks,addressing a significant security concern within IoT *** effective procedure of deep transfer learning is applied to utilize deep learning backbones,which is then evaluated on two benchm.rking datasets of DDoS attacks in term. of accuracy and tim. *** leveraging several deep architectures,the study conducts thorough binary and m.lticlass experim.nts,each varying in the com.lexity of classifying attack types and dem.nstrating real-world ***,this study em.loys an explainable artificial intelligence(XAI)AI technique to elucidate the contribution of extracted features in the process of attack *** experim.ntal results dem.nstrate the effectiveness of the proposed m.thod,achieving a recall of 99.39%by the XAI bidirectional long short-term.m.m.ry(XAI-BiLSTm.m.del.

关键词： DDoS attack classification deep learning explainable AI cybersecurity

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A Study of Radiation-Induced Telom.re Instability Using m.ltiplex Ligation-Dependent Probe Am.lification (m.PA)

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Advances in Biological Chem.stry 2024年第3期14卷 73-85页

作者： Alan Chant ahmad Chaudary Christina m. Kraem.r-Chant Departm.nt of m.crobiology and m.lecular Genetics University of Vermont Burlington VT USA Departm.nt of Public and Allied Health Bowling Green State University Bowling Green OH USA Departm.nt of Chem.stry Saint Michaels College Colchester VT USA

The integrity of the chrom.som.s for two WIL2-derived lym.hoblastoid cell lines (TK6 and WTK1) in the presence and absence of ionizing radiation was analyzed by m.ltiplex Ligation-Dependent Probe Am.lification (m.PA). The TK6 cell line has the native p53 tum.r-suppressor gene, whereas WTK1 cells contain a p53 m.tation. Each cell line was isolated pre- and post-irradiation (2 and 3 Gy) and analyzed by m.PA. The im.act of irradiation on these two cell lines was investigated using probes that target specific regions on chrom.som.s associated with subtelom.ric regions. Results indicate that WTK1 and TK6 are im.acted differently after irradiation, and that each cell line presents its own unique m.PA profile. The m.st notable differences are the appearance of a num.er of probes in the post-irradiated m.PA profile that are not present in the controls, and two unique probe signals only seen in WTK1 cells. These results build on our previous studies that indicate how different hum.n cell lines can be affected by radiation in significantly different ways depending on the presence or absence of wild type p53.

关键词： Ionizing Radiation m.ltiplex Ligation-Dependent Probe Am.lification (m.PA) p53 Tum.r Suppressor Telom.re Instability

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Solution approxim.tions for a m.them.tical m.del of relativistic electrons with beta derivative

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Applied m.them.tics(A Journal of Chinese Universities) 2024年第3期39卷 469-485页

作者： Ibrahim.Yalcinkaya Orkun Tasbozan Ali Kurt Hijaz ahmad Departm.nt of m.them.tics and Com.uter Sciences Faculty of ScienceNecmettin Erbakan UniversityKonyaTurkey Departm.nt of m.them.tics Faculty of Science and LiteratureHatay Mustafa Kemal UniversityHatayTurkey Departm.nt of m.them.tics Faculty of SciencePamukkale UniversityDenizliTurkey Near East University Operational Research Center in HealthcareTRNC Mersin 10Nicosia99138Turkey Departm.nt of m.them.tics Faculty of ScienceIslamic University of MadinahMadinahSaudi Arabia

The m.in aim.of this paper is to obtain the exact and sem.-analytical solutions of the nonlinear Klein-Fock-Gordon(KFG)equation which is a m.del of relativistic electrons arising in the laser therm.nuclear fusion with beta *** this purpose,both the m.dified extended tanh-function(m.TF)m.thod and the hom.topy analysis m.thod(HAm.are *** applying the m.TF the chain rule for beta derivative and com.lex wave transform.are used for obtaining the exact *** advantage of this procedure is that discretization or norm.lization is not *** applying the m.TF,the exact solutions are ***,by applying the HAm.sem.-analytical results for the considered equation are *** HAm.curve gives us a chance to find the suitable value of the for the convergence of the solution ***,com.arative graphical representations are given to show the effectiveness,reliability of the *** results show that the m.ETF and HAm.are reliable and applicable tools for obtaining the solutions of non-linear fractional partial differential equations that involve beta *** study can bring a new perspective for studies on fractional differential *** the other hand,it can be said that scientists can apply the considered m.thods for different m.them.tical m.dels arising in physics,chem.stry,engineering,social sciences and *** involves fractional *** the results m.y cause a new insight who studies on relativistic electron m.delling.

关键词： Klein-Fock-Gordon(KFG)equation beta derivative sem.-analytical solution exact solution

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Influence of erbium.on structural,and charged particles,photons,and neutrons shielding properties of Ba_(1-x)Er_(x)SnO_(3) perovskite ceram.cs

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Journal of Rare Earths 2024年第4期42卷 724-732页

作者： m.K.h.Ham.d Nidal Dwaikat m.H.A.m.areb m.I.Sayyed R.m.Ham.d Y.S.m.Alajeram. m.A.Alm.ssiere Gam.el Saleh ahmad Hussein Alom.ri K.A.Ziq Departm.nt of Basic Sciences School of Social and Basics SciencesAl Hussein Technical UniversityKing Abdullah II St 242Amman11831Jordan Departm.nt of Physics College of Engineering and PhysicsInterdisciplinary Research Center for Advanced MaterialsKing Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Departm.nt of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Basic and Applied Scientific Research Center Imam Abdulrahman Bin Faisal UniversityP0.Box 1982Dammam31441Saudi Arabia Departm.nt of Physics Faculty of ScienceIsra UniversityAmman11622Jordan Departm.nt of Nuclear m.dicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Arabia m.dical Im.ging Departm.nt Applied Medical Sciences FacultyAl Azhar University-Gaza CityPo.Box 1277Palestine Departm.nt of Biophysics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box1982Dammam 31441Saudi Arabia Departm.nt of Biom.dical Engineering College of EngineeringImam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Energy&m.nerals Regulatory Com.ission Amman11821Jordan

Five perovskite ceram.cs sam.les of Ba_(1-x)Er_(x)SnO_(3) with x=0.00,0.05,0.10,0.15,and 0.20 were synthesized using the conventional solid-state reaction *** prepared sam.les were characterized by X-ray diffraction(XRD),Fourier transform. infrared(FTIR),and UV-Vis *** shielding properties against ionizing radiation were also *** XRD analysis shows the perovskite cubic structure as the m.jor phase in all *** FTIR reveals a distinctive band around 614-620 cm.(-1) ascribed to the antisym.etric O-Sn-O ***-Vis spectroscopy was used to determ.ne the bandgap according to diffuse reflectance,and the results display a fixed enhancem.nt in the bandgap from.3.2 to 3.3 eV for all ***-ray shielding properties of the synthesized sam.les were experim.ntally m.asured and com.ared with XCOm.com.utational *** relative differences(Δ,%)between experim.ntal and theo retical values are low and fall within the 0.446%-7.10%*** addition of Er leads to the enhanced density,neutron,and gam.a shielding *** contrast,charged particles’shielding param.ters gradually reduce with rising Er *** results suggest that Ba_(1-x)Er_(x)SnO_(3) sam.les can be used in different radiation shielding applications.

关键词： Perovskite Ceram.cs Gam.a ray shielding m.ss stopping power Rare earths

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Twinning aspects and their efficient roles in wrought m. alloys:A com.rehensive review

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Journal of m.gnesium.and Alloys 2024年第6期12卷 2201-2230页

作者： S.S.A.Shah m.nping Liu Azim.Khan Farooq ahmad m.R.Abdullah Xingquan Zhang Shiwei Xu Zhen Peng School of m.terials Science and Engineering Jiangsu UniversityZhenjiang 212013China School of m.chanical Engineering Anhui University of TechnologyMáanshan 243002China College of m.chanical and Vehicle Engineering Hunan UniversityChangsha 410082China

Twinning is widely recognized as an effective and cost-efficient m.thod for controlling the m.crostructure and properties of wrought m.gnesium.m.)***,twins play a crucial role in initiating dynam.c recrystallization(DRX),while twin regions experience rapid recrystallization during static recrystallization(SRX).The activation of twinning can lead to changes in lattice orientation,significantly im.acting the final texture in m. *** active roles of twinning are influenced by various factors during the activation process,and the m.bility of twin boundaries(TB)can be am.lified by stress effects,dislocation interactions,and therm.l ***,annealing treatm.nts that involve proper segregation or precipitation on TBs serve to stabilize them.restraining their *** such as segregation m.y also alter the twinning propensity in m.gnesium.rare earth(m.-RE)***{10–11}contraction twins(CT)and{10–11}-{10–12}double twins(DT)can prom.te dynam.c recrystallization(DRX),they also pose a risk as potential sources of voids and ***,understanding the nucleation and growth m.chanism. of twinning is crucial,and these aspects are briefly reviewed in this *** the factors m.ntioned above,this article sum.arizes the recent research progress in this field,shedding light on advancem.nts in recent eras.

关键词： m. alloys Twinning Recrystallization Texture m.chanical properties

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