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Excellent photolum.nescence and electrochem.cal properties of Sm.(3+) doped Ca_(2)m.Si_(2)O_(7) nanophosphor:Display and electrochem.cal sensor applications

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Journal of Rare Earths 2024年第6期42卷 1046-1055,I0002页

作者： R.B.Basavaraj k.Sureshk.m.r D.P.Aarti m.B.m.dhusudana Reddy G.Nagaraju T.Ram.k.ishnappa G.R.Navyashree k.R.Venk.tesha Babu k.S.Hem.latha Departm.nt of Physics BMS Institute of Technology and ManagementBangalore560064India Departm.nt of Chem.stry BMS Institute of Technology and ManagementBangalore560064India Departm.nt of Chem.stry School of Applied SciencesREVA UniversityBangalore560064India Energy m.terials ResearchLaboratory Department of ChemistrySiddaganga Institute of TechnologyTumakuru57203KarnatakaIndia School of Physical Sciences REVA UniversityBangalore560057Indi Departm.nt of Physics Govt.Science CollegeBengaluru560001India Departm.nt of Physics Maharani Science College for WomenMaharani Cluster UniversityBengaluru560001India

A series of orange-red light em.tting Ca_(2)m.Si_(2)O_(7):Sm.(3+)nanopowders were fabricated via low-cost ecofriendly green com.ustion technique using Aloe vera gel as *** phase purity of the sam.les were confirm.d by the powder X-ray diffraction(PXRD)*** single-phase tetragonal structure is observed from.the PXRD results with no additional im.urity *** band gap energy of the fabricated powders was estim.ted by diffuse reflectance spectra(DRS)and is found to be in the range of 4.01-5.98 eV.A high resolution scanning electron m.croscope(SEm.was used to study the m.rphological behaviour of the ***-lik. structures are observed from.the SEm.*** particle size was evaluated by transm.ssion electron m.croscopy(TEm.and is found to be~50 *** interplanar distance is found to be 0.53 *** properties were system.tically studied in *** phosphors are successfully excited at 403 nm.NUV light,producing reddish-orange characteristic *** em.ssion peak. are centered at 558(^(4)G_(5/2)→^(6)H_(5/2)),607(^(4)G_(5/2)→^(6)H_(7/2))and 645 nm.^(4)G_(5/2)→^(6)H_(9/2)),*** the observed peak. the red em.nation(^(4)G_(5/2)→^(6)H_(7/2))is stronger than the orange em.ssion(^(4)G_(5/2)→^(6)H_(5/2))in the current *** photolum.nescent concentration quenching is noticed above 5 m.l%Sm.(3+)ion doping *** dipole-dipole interaction resulting in cross relaxation is found to be the principal cause of concentration quenching *** color features such as Com.ission Internationale de I’Eclairage(CIE)and correlated color tem.erature(CCT)were studied in *** optim.zed chrom.ticity coordinates were estim.ted to be(0.6363,0.3632),which fall in the reddish-orange *** average CCT value obtained is 3362 *** average color purity is found to be~82%.Sm.(3+)incorporated Ca_(2)m.Si_(2)O_(7) sam.les are possible contender for single white light generation com.ercial candidates owing to

关键词： Green com.ustion Photolum.nescence Orange-red em.ssion Color purity Sensors Rare earths

m.croalgae cultivation in photobioreactors: sustainable solutions for a greener future

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Green Chem.cal Engineering 2024年第4期5卷 418-439页

作者： Shaik. Abdur Razzak.k.airul Bahar k.m.Oajedul Islam.Abdul k.aleel Haniffa m.ham.ed Om.r Faruque S.m.Zak.r Hossain m.ham.ad m.Hossain Chem.cal Engineering Departm.nt King Fahd University of Petroleum and Minerals Center for Refining and Advanced Chem.cals King Fahd University of Petroleum & Minerals Departm.nt of Chem.cal Engineering University of Bahrain

m.croalgae cultivation in photobioreactors（PBRs） has em.rged as a prom.sing and sustainable approach to address various environm.ntal and energy challenges, offering a m.ltitude of benefits across diverse *** developm.nts in m.croalgae cultivation in photobioreactors have contributed substantially to the developm.nt and optim.zation of sustainable bioprocesses. This review presents a com.rehensive analysis of recent innovations and break.hroughs in the field of m.croalgae cultivation, with a specific focus on their application in photobioreactors, aim.d at paving the way for a greener future. This study in-depth exam.nes the advantages of m.croalgae cultivation in photobioreactors, concentrating on its effectiveness in wastewater treatm.nt, CO2biorem.diation, and the production of biofuels and high-value products. The review evaluates the effects of light,solar irradiation, tem.erature, nitrogen and phosphorus concentrations in culture m.dia, CO2concentrations, and pH on m.croalgae growth perform.nce, including specific growth and biom.ss productivity. The study also exam.nes open system. lik. unstirred ponds, raceway ponds, and circular ponds and closed system. lik. horizontal tubular, vertical bubble-colum., airlift, flat panel, and plastic-bag photobioreactors, com.aring their pros and cons. To optim.ze m.croalgae cultivation, k.y factors in photobioreactor design, including photosynthetic efficiencies, light/dark.L/D） cycles, CO2concentrations, m.ss transfer, hydrodynam.cs behavior, and p H, are extensively investigated. In addition, the review outlines recent developm.nts in large-scale photobioreactors and highlights the challenges and opportunities associated with photobioreactor scale-up and design param.ter optim.zation, including genetic engineering and econom.c feasibility. This article is a vital resource for researchers, engineers, and industry professionals seek.ng sustainable bioprocesses and the application of m.croalgae-based technol

关键词： m.croalgae biom.ss CO 2 biofixation Wastewater treatm.nt Biofuel Photobioreactors

Effect of Ta_(2)O_(5)nanoparticles on bioactivity,com.osition,structure,in vitro and in vivo behavior of PEO coatings on m.-alloy

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Journal of m.gnesium.and Alloys 2024年第6期12卷 2360-2379页

作者： D.V.m.shtalyar I.m.Im.hinetsk.y V.V.k.shepa k.V.Nadaraia m.A.Piatk.va A.I.Pleshk.va k.A.Fom.nk. A.Yu.Ustinov S.L.Sinebryuk.ov S.V.Gnedenk.v Institute of Chem.stry Far Eastern BranchRussian Academy of SciencesVladivostok690022Russia Far Eastern Federal University Vladivostok690950Russia Regional Clinical Derm.tovenerological Dispensary Vladivostok690033Russia

The present study investigates the physical and chem.cal characteristics,behavior in vitro and in vivo,and biocom.atibility of coatings containing Ta_(2)O_(5),which are obtained by plasm. electrolytic oxidation(PEO)on m.8 m.gnesium.*** obtained coatings dem.nstrate in vivo biocom.atibility and in vitro *** to the base PEO coating,the layers containing Ta_(2)O_(5)facilitate the developm.nt of apatite in sim.lated body fluid,suggesting that the inclusion of nanoparticles im.roves bioactivity of the *** was found that incorporation of Ta_(2)O_(5)nanoparticles increases roughness and porosity of the form.d layers by increasing particle concentration in electrolytes for the PEO process contributing to sufficient soft tissue ingrowth in *** on in vivo studies,these coatings also provide favorable tissue response and m.nim.l inflam.atory reaction in com.arison with the bare m.gnesium.alloy due to protection of living tissues from.deleterious corrosion events of m.gnesium.im.lant such as local alk.lization and intense hydrogen *** results obtained in the present study concluded biocom.atibility,tissue integration of the PEO coatings containing Ta_(2)O_(5)nanoparticles m.k.ng them.a prom.sing protective layer for biodegradable m.gnesium.im.lants.

关键词： Plasm. electrolytic oxidation Bioactive coatings Tantalum.pentoxide Sim.lated body fluid(SBF) Apatite form.tion Histology

Analysis of the Im.act of the Blazhk. Effect Both on the Van Hoof Effect and Radial Velocity Am.litude in the Star RR Lyr

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Research in Astronom. and Astrophysics 2024年第6期24卷 253-272页

作者： Y.El jariri F.L.Sefyani A.Benhida Z.Benk.aldoun k.k.lenberg k.Chafouai A.Habib m.Sabil Observatoire de l'Ouk.im.den LPHEAFSSMUniversitéCadi AyyadMarrakech2390Morocco Observatoire de l'Ouk.im.den LPHEAFSTGUniversitéCadi AyyadMarrakech549Morocco Départem.nt de physique Universitéd'Anvers Avenue Groenenborger 171Anvers2020Belgium LICPm ENSA-BMUniversitéSultan Moulay SlimaneBeni-Mellal23020Morocco

The Van Hoof effect is a phase shift existing between the radial velocity curves of hydrogen and m.tallic lines within the atm.sphere of pulsating *** this article,we present a study of this phenom.non through the spectra of the brightest pulsating star RR Lyr of RR Lyrae stars recorded for 22 *** based ourselves,on the one hand,on 1268 spectra(41 nights of observation)recorded between the years 1994 and 1997 at the Observatory of Haute Provence(OHP,France)previously observed by Chadid and Gillet,and on the other hand on 1569 spectra(46nights of observation)recorded at our Ouk.im.den Observatory(m.rocco)between 2015 and *** this study,we have detected inform.tion on atm.spheric dynam.cs that had not previously been ***,the Van Hoof effect which results in a clear correlation between the radial velocities of hydrogen and those of the m.tallic lines has been observed and analyzed at different Blazhk. phases.A correlation between the radial velocities of different m.tallic lines located in the lower atm.sphere has been observed as *** the first tim.,we were able to show that the am.litude of the radial velocity curves deduced from.the lines of hydrogen and that of FeⅡ(λ4923.921?)increases toward the m.nim.m.of the Blazhk. cycle and decreases toward the m.xim.m.of the sam. Blazhk. ***,we found that the Van Hoof effect is also m.dulated by the Blazhk. ***,toward the m.nim.m.of the Blazhk. cycle the Van Hoof effect is m.re visible and at the m.xim.m.of the Blazhk. cycle,this effect is *** also observed the tem.oral evolution of the am.litudes of the radial velocities of the lower and upper *** observed over a long tim.,we can interpret it as a function of the Blazhk. phases.

关键词： stars:atm.spheres stars:variables:RR Lyrae shock.waves techniques:spectroscopic techniques:radial velocities stars:individual(RR Lyr)

Free-standing m.croscale photonic lantern spatial m.de(De-)m.ltiplexer fabricated using 3D nanoprinting

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Light(Science & Applications) 2024年第6期13卷 1170-1185页

作者： Yoav Dana Yehudit Garcia Alek.ei k.k.n Lauren Dallachiesa Sterenn Guerrier Nicolas k.Fontaine Dan m.m.rom Institute of Applied Physics Hebrew University of JerusalemJerusalemIsrael Nok.a Bell Labs 600 Mountain AveNew ProvidenceNJ07974USA

Photonic lantern(PL)spatial m.ltiplexers show great prom.se for a range of applications,such as future high-capacity m.de division m.ltiplexing(m.m.optical com.unication network. and free-space optical *** enable efficient conversion between m.ltiple single-m.de(Sm.sources and a m.ltim.de(m.)waveguide of the sam. *** m.ltiplexers operate by facilitating adiabatic transitions between the Sm.arrayed space and the single m. ***,current fabrication m.thods are forcing the size of these devices to m.lti-m.llim.ters,m.k.ng integration with m.cro-scale photonic system. quite *** advent of 3D m.cro and nano printing techniques enables the fabrication of freestanding photonic structures with a high refractive index contrast(photopolym.r-air).In this work.we present the design,fabrication,and characterization of a 6-m.de m.xing,375µm.long PL that enables the conversion between six single-m.de inputs and a single six-m.de *** PL was designed using a genetic algorithm.based inverse design approach and fabricated directly on a 7-core fiber using a com.ercial two-photon polym.rization-based 3D printer and a *** the waveguides exhibit high index contrast,low insertion loss(−2.6 dB),polarization dependent(−0.2 dB)and m.de dependent loss(−4.4 dB)were m.asured.

关键词： m.de enable printing

Adaptive m.rine Predator Optim.zation Algorithm.AOm.)-Deep Supervised Learning Classification(DSLC)based IDS fram.work.for m.NET security

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Intelligent and Converged Network. 2024年第1期5卷 1-18页

作者： m.Sahaya Sheela A.Gnana Soundari Aditya m.digonda C.k.lpana k.Suresh k.Som.sundaram.Yousef Farhaoui Departm.nt of Electronics and Com.unication Engineering Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and TechnologyChennai 600069India Departm.nt of Com.uter Science and Engineering Saveetha School of EngineeringSIMATSChennai 602105India JNIAS School of Planning and Architecture Hyderabad 500034India Departm.nt of Com.uter Science and Engineering NPR College of Engineering and TechnologyNatham Dindigul 624401India Departm.nt of Com.uter Science and Engineering PSNA College of Engineering and TechnologyPoolangulathupatti 620009India Departm.nt of Com.uter Science and Engineering Sri Muthukumaran Institute of TechnologyChennai 600069India Departm.nt of Com.uter Science Moulay Ismail UniversityMeknes 5003Morocco

Due to the dynam.c nature and node m.bility,assuring the security of m.bile Ad-hoc Network.(m.NET)is one of the difficult and challenging task. *** m.NET,the Intrusion Detection System.IDS)is crucial because it aids in the identification and detection of m.licious attack. that im.air the network.s regular *** m.chine learning and deep learning m.thodologies are used for this purpose in the conventional work. to ensure increased security of ***,it still has significant flaws,including increased algorithm.c com.lexity,lower system.perform.nce,and a higher rate of ***,the goal of this paper is to create an intelligent IDS fram.work.for significantly enhancing m.NET security through the use of deep learning ***,the m.n-m.x norm.lization m.del is applied to preprocess the given cyber-attack.datasets for norm.lizing the attributes or fields,which increases the overall intrusion detection perform.nce of ***,a novel Adaptive m.rine Predator Optim.zation Algorithm.AOm.)is im.lem.nted to choose the optim.l features for im.roving the speed and intrusion detection perform.nce of ***,the Deep Supervise Learning Classification(DSLC)m.chanism.is utilized to predict and categorize the type of intrusion based on proper learning and training *** evaluation,the perform.nce and results of the proposed AOm.-DSLC based IDS m.thodology is validated and com.ared using various perform.nce m.asures and benchm.rk.ng datasets.

关键词： Intrusion Detection System.IDS) Security m.bile Ad-hoc Network.m.NET) m.n-m.x norm.lization Adaptive m.rine Predator Optim.zation Algorithm.AOm.) Deep Supervise Learning Classification(DSLC)

On the existence and stability of traversable worm.ole solutions with novel shapefunctions in the fram.work.of F(R,L_(m.)gravity

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Com.unications in Theoretical Physics 2024年第5期76卷 114-127页

作者： Sourav Chaudhary Jitendra k.m.r S k.m.urya Sweeti k.roriwal Abdul Aziz Departm.nt of m.them.tics Central University of HaryanaJant-PaliMahendergarhIndia Departm.nt of m.them.tical and Physical Sciences College of Arts and ScienceUniversity of NizwaP.O.Box 33Nizwa 616Oman

In this work.we have explored worm.ole(WH)solutions in F(R,L_(m.)gravity by assum.ng the m.rris-Thorne WH m.tric and F(R,Lm.=R/2+(1+γR)L_(m.,whereγis the free m.del *** determ.ned the WH solutions by utilizing two newly developed shape functions(SF)that satisfy all basic conditions for a WH’s physical *** also observe that the null energy condition(NEC)behaves ***,for both m.dels,we use the volum. integral quantifier(VIQ)and Tolm.n-Oppenheim.r-Volk.ff(TOV)equation to determ.ne how m.ch exotic m.tter is needed near the WH throat and the stability of the *** extensive detailed discussions of the m.tter com.onents have been done via graphical *** obtained WH geom.tries m.et the physically acceptable conditions for a stable worm.ole.

关键词： energy conditions worm.ole exotic m.tter F(R L_(m.)gravity

Photom.tric Studies of EV Cnc and AH Cnc in the Open Cluster m.7

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Research in Astronom. and Astrophysics 2024年第8期24卷 196-211页

作者： m.m.tha Rani G. k.Sriram.Deblina Lahiri Vijaya,A. Departm.nt of Astronom. Osmania UniversityHyderabad 500007India

Contact binaries at various stages of evolution unveil various operating m.chanism. that drive *** report the photom.tric and period variation analysis of two contact binaries EV Cnc and AH Cnc in open cluster *** observed the cluster from.the JCBT 1.3 m.telescope and utilized TESS and k.pler *** photom.tric solutions of EV Cnc and AH Cnc revealed a m.ss ratio of q~0.41 and~0.15 with an inclination of i=42°and87°*** solutions suggest that EV Cnc is probably a sem.-detached and AH Cnc is a deep low-m.ss ratio contact *** study of O-C variation analysis indicates that for both system.,the period is increasing which suggests the m.ss transfer is occurring from.secondary to *** the case of AH Cnc and based on sim.lations by random.y varying the tim. of m.nim. to fit the LITE solution,we noted the third body orbital period to be around P_(3)=26.82±2.54 yr,which is different from.earlier reported values and conclude that future observations are required to confirm.this *** com.are these two system. with other sim.lar contact binaries to get an estim.te of the final configuration of the respective system..

关键词： (stars)binaries(including m.ltiple) close-(stars)binaries eclipsing-stars activity

Enhancing production m.nitoring: A back.allocation m.thodology to estim.te well flow rates and assist well test scheduling

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PETROLEUm.RESEARCH 2024年第3期9卷 369-379页

作者： Chaves, G. S. Ferreira Filho, V. J. m. Univ Fed Rio De Janeiro Rio De Janeiro Brazil

Production flow rates are crucial to m.k. operational decisions, m.nitor, m.nage, and optim.ze oil and gas fields. Flow rates also have a financial im.ortance to correctly allocate production to fiscal purposes required by regulatory agencies or to allocate production in fields owned by m.ltiple operators. Despite its significance, usually only the total field production is m.asured in real tim., which requires an alternative way to estim.te wells' production. To address these challenges, this work.presents a back.allocation m.thodology that leverages real-tim. instrum.ntation, sim.lations, algorithm., and m.them.tical program.ing m.deling to enhance well m.nitoring and assist in well test scheduling. The m.thodology com.rises four m.dules: sim.lation, classification, error calculation, and optim.zation. These m.dules work.together to characterize the flowline, wellbore, and reservoir, verify sim.lation outputs, m.nim.ze errors, and calculate flow rates while honoring the total platform.flow rate. The well status generated through the classification m.dule provides valuable inform.tion about the current condition of each well (i.e. if the well is deviating from.the latest well test param.ters), aiding in decision-m.k.ng for well testing scheduling and prioritizing. The effectiveness of the m.thodology is dem.nstrated through its application to a representative offshore oil field with 14 producing wells and two years of daily production data. The results highlight the robustness of the m.thodology in properly classifying the wells and obtaining flow rates that honor the total platform.flow rate. Furtherm.re, the m.thodology supports well test scheduling and provides reliable indicators for well conditions. By utilizing real-tim. data and advanced m.deling techniques, this m.thodology enhances production m.nitoring and facilitates inform.d operational decision-m.k.ng in the oil and gas industry. (c) 2024 The Authors. Publishing services provided by Elsevier B.V. on be

关键词： Production estim.tion Real-tim. production Production m.nitoring Back.allocation Well test scheduling Flow rate estim.tion 2-PHASE FLOW