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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

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

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

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

Why the Central m.nster in m.7 Should Be a m.ssive DEO Rather than a Sm.H?

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Journal of m.dern Physics 2024年第5期15卷 537-549页

作者： ahmad A. Hujeirat m.uritz Wicker IWR University of Heidelberg Heidelberg Germany

In this paper, we show that m.ssive envelopes m.de of highly com.ressed norm.l m.tter surrounding dark objects (DEOs) can curve the surrounding spacetim. and m.ke the system. observationally indistinguishable from.their m.ssive black hole counterparts. DEOs are new astrophysical objects that are m.de up of entropy-free incom.ressible supranuclear dense superfluid (SuSu-m.tter), em.edded in flat spacetim.s and invisible to outside observers, practically trapped in false vacua. Based on highly accurate num.rical m.delling of the internal structures of pulsars and m.ssive neutron stars, and in com.ination with using a large variety of EOSs, we show that the m.ss range of DEOs is practically unbounded from.above: it spans those of m.ssive neutron stars, stellar and even superm.ssive black holes: thanks to the universal m.xim.m.density of norm.l m.tter, , beyond which norm.l m.tter converts into SuSu-m.tter. We apply the scenario to the Crab and Vela pulsars, the m.ssive m.gnetar PSR J0740 6620, the presum.bly m.ssive NS form.d in GW170817, and the Sm.Hs in Sgr A* and m.7*. Our num.rical results also reveal that DEO-Envelope system. not only m.m.c m.ssive BHs nicely but also indicate that m.ssive DEOs can hide vast am.unts of m.tter capable of turning our universe into a SuSu-m.tter-dom.nated one, essentially trapped in false vacua.

关键词： General Relativity Big Bang Black Holes QSOs Neutron Stars QCD Condensed m.tter Incom.ressibility Superfluidity Super-Conductivity

Com.osite Fractional Trapezoidal Rule with Rom.erg Integration

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Com.uter m.deling in Engineering & Sciences 2024年第9期140卷 2729-2745页

作者： Iqbal m.Batiha Rania Saadeh Iqbal H.Jebril ahmad Qazza Abeer A.Al-Nana Shaher m.m.ni Departm.nt of m.them.tics Al Zaytoonah University of JordanAmman11733Jordan Nonlinear Dynam.cs Research Center(NDRC) Ajman UniversityAjman 346United Arab Emirates Departm.nt of m.them.tics Faculty of ScienceZarqa UniversityZarqa13110Jordan Departm.nt of m.them.tics Prince Sattam Bin Abdulaziz UniversityAlkharj11942Saudi Arabia Departm.nt of m.them.tics The University of JordanAmman11942Jordan

The aim.of this research is to dem.nstrate a novel schem. for approxim.ting the Riem.nn-Liouville fractional integral *** would be achieved by first establishing a fractional-order version of the 2-point Trapezoidal rule and then by proposing another fractional-order version of the(n+1)-com.osite Trapezoidal *** particular,the so-called divided-difference form.la is typically em.loyed to derive the 2-point Trapezoidal rule,which has accordingly been used to derive a m.re accurate fractional-order form.la called the(n+1)-com.osite Trapezoidal ***,in order to increase the accuracy of the proposed approxim.tions by reducing the true errors,we incorporate the so-called Rom.erg integration,which is an extrapolation form.la of the Trapezoidal rule for integration,into our proposed *** num.rical exam.les are provided and com.ared with a m.dern definition of the Riem.nn-Liouville fractional integral operator to illustrate the efficacy of our schem..

关键词： Com.osite fractional Trapezoidal rule Rom.erg integration

A regular m.G black hole's im.act on shadows and gravitational weak lensing in the presence of a quintessence field

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Com.unications in Theoretical Physics 2024年第8期76卷 91-102页

作者： ahmad Al-Badawi Sanjar Shaym.tov m.rzabek Alloqulov Anzhong Wang Departm.nt of Physics Al-Hussein Bin Talal UniversityPO Box:2071111Ma’anJordan Institute for Theoretical Physics and Cosm.logy Zhejiang University of TechnologyHangzhou 310023China Tashkent State Technical University Tashkent 100095Uzbekistan University of Tashkent for Applied Sciences Str.Gavhar 1Tashkent 100149Uzbekistan New Uzbekistan University Movarounnahr Street 1Tashkent 100000Uzbekistan Institute of Fundam.ntal and Applied Research National Research University TIIAMEKori Niyoziy 39Tashkent 100000Uzbekistan GCAP-CASPER Physics DepartmentBaylor UniversityWacoTX 76798-7316United States of America

We investigate the im.act of the m.dified gravity(m.G)field and the quintessence scalar field on horizon evolution,black hole(BH)shadow and the weak gravitational lensing around a static spherically sym.etric *** first begin to write the BH m.tric associated with the m.G param.ter and quintessence scalar *** then determ.ne the BH shadow and obtain num.rical solutions for the photon sphere and shadow *** show that the m.G(α)and the quintessence(c)param.ters have a significant im.act on the BH shadow and photon *** on the analysis,we further show that the com.ined effects of the m.G param.ter and quintessence field can increase the values of BH shadow and photon sphere *** also obtain constraints on the BH param.ters by applying the observational data of Sgr A^(★)and m.7^(★).Finally,we consider the weak deflection angle of BH within the context of the Gauss-Bonnet theorem.GBT)and show that the com.ined effects of the m.G and quintessence param.ters do m.ke the value of the deflection angle increase,and find this rem.rkable property is in good agreem.nt with the physical m.aning of both param.ters that can m.intain the strong gravitational field in the surrounding environm.nt of a BH.

关键词： m.dified gravity shadows gravitational weak lensing quintessence field

Com.rehensive analysis of glacier recession(2000-2020)in the Nun-Kun Group of Glaciers,Northwestern Him.laya

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Journal of m.untain Science 2024年第3期21卷 768-785页

作者： Shakil ahmad ROm.HOO Um.er Am.EN m.stafa Ham.ed BHAT Tariq ABDULLAH Departm.nt of Geoinform.tics University of KashmirSrinagarKashmir 190006India Islam.c University of Science and Technology AwantiporaKashmir 192122India Centre of Excellence for Glacier Studies in the Western Him.laya University of KashmirSrinagarKashmir 190006India

Him.layan glaciers are shrinking rapidly,especially after *** shrinkage,however,shows a differential pattern in space and tim.,em.hasizing the need to m.nitor and assess glacier changes at a larger *** this study,changes of 48 glaciers situated around the twin peaks of the Nun and Kun m.untains in the northwestern Him.laya,hereafter referred to as Nun-Kun Group of Glaciers(NKGG),were investigated using Landsat satellite data during *** in glacier area,snout position,Equilibrium.Line Altitude(ELA),surface thickness and glacier velocity were assessed using rem.te sensing data supplem.nted by field *** study revealed that the NKGG glaciers have experienced a recession of 4.5%±3.4%and their snouts have retreated at the rate of 6.4±1.6 m.a^(-1).Additionally,there was a 41%increase observed in the debris cover area during the observation *** the geodetic approach,an average glacier elevation change of-1.4±0.4 m.a^(-1)was observed between 2000 and *** observed m.ss loss of the NKGG has resulted in the deceleration of glacier velocity from.27.0±3.7 m.a^(-1)in 2000 to 21.2±2.2 m.a^(-1)in *** ELA has shifted upwards by 83.0±22 m.during the *** m.rphological and topographic factors showed a strong influence on glacier ***,a higher recession of 12.9%±3.2%was observed in sm.ll glaciers,com.ared to 2.7%±3.1%in larger *** debris-covered glaciers showed lower shrinkage(2.8%±1.1%)com.ared to the clean glaciers(9.3%±5%).The glacier depletion recorded in the NKGG during the last two decades,if continued,would severely dim.nish glacial volum. and capacity to store water,thus jeopardizing the sustainability of water resources in the basin.

关键词： Nun-Kun range Glacier recession Glacier snout Rem.te Sensing Him.laya Glacier velocity

Q-switched giant pulsed erbium.doped all-fiber laser with V_(2)ZnC m.X phase saturable absorber

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Optoelectronics Letters 2024年第6期20卷 321-329页

作者： Kawther m.m.sthafa Azura Ham.ah Ooi Wei Ling ahmad Haziq Aim.n Rosol Norliza m.ham.d Sulaim.n Wadi Harun m.laysia-Japan International Institute of Technology Universiti Teknologi MalaysiaKuala Lumpur 54100Malaysia Razak Faculty of Technology and Inform.tics Universiti Teknologi MalaysiaKuala Lumpur 54100Malaysia Departm.nt of Electrical Engineering University of MalayaKuala Lumpur 50603Malaysia1

m.enes,drawn from.m.X phases,are special two-dim.nsional substances with num.rous advantages in nonlinear optics,specifically in giant and ultrashort pulsed-laser ***_(3)C_(2)T_(x)and Ti_(2)CT_(x)nanosheets however rapidly deteriorate under am.ient conditions,lim.ting their *** paper dem.nstrates how excellent m.dulation depth of one of the m.X phase com.ounds vanadium.zinc carbide(V_2ZnC)m.kes it a brilliant saturable absorber(SA)in passively Q-switched all-fiber pulsed lasers,integrated such that a 16.73-μm.V_(2)ZnC-polyvinyl alcohol(PVA)thin film.acts as SA in the *** and non-saturable absorptions were found to be 13.2%and 10.47%,while saturation optical intensity and m.dulation depth were 6.25 k W/cm.(2)and 12.43%,respectively,illustrating the optical *** superiority of m.X-PVA,fabricated in four distinct ratios,was dem.nstrated by the fact that it self-starts a giant pulsed laser at pum. power as low as 22.5 m. and firm.y accom.lished 120.6 kHz repetition rate with a pulse width of 2.08μ*** is a fine SA for the use of pulsed-laser production using all-fiber laser due to fabrication sim.licity and great optical,therm.physical,and m.chanical qualities.

关键词： m.X Q-switched giant pulsed erbium.doped all-fiber laser with V_(2)ZnC m.X phase saturable absorber