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Converting TREx-RGB green-channel data to 557.7 nm auroral intensity:Methodology and initial results

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Earth and Planetary Physics 2024年第1期8卷 258-274页

作者： Jun Liang D.M.Gillies E.Spanswick E.f.Donovan University of.Calgary CalgaryT2N 1N4Canada

The recently deployed Transition Region Explorer(TREx)-RGB(red-green-blue)all-sky imager(ASI)is designed to capture“true color”images of.the aurora and *** the 557.7 nm green line is usually the brightest emission line in visible auroras,the green channel of.a TREx-RGB camera is usually dominated by the 557.7 nm *** this rationale,the TREx mission does not include a specif.c 557.7 nm imager and is designed to use the RGB green-channel data as a proxy f.r the 557.7 nm *** this study,we present an initial ef.ort to establish the conversion ratio or f.rmula linking the RGB green-channel data to the absolute intensity of.557.7 nm auroras,which is crucial f.r quantitative uses of.the RGB *** illustrate two approaches:(1)through a comparison with the collocated measurement of.green-line auroras f.om the TREx spectrograph,and(2)through a comparison with the modeled green-line intensity according to realistic electron precipitation f.ux measurements f.om low-Earth-orbit satellites,with the aid of.an auroral transport *** demonstrate the procedures and provide initial results f.r the TREx-RGB ASIs at the Rabbit Lake and Lucky Lake *** RGB response is f.und to be *** conversion ratios or f.rmulas between RGB green-channel data and the green-line auroral intensity are given and can be applied immediately by TREx-RGB data *** methodology established in this study will also be applicable to the upcoming SMILE ASI mission,which will adopt a similar RGB camera system in its deployment.

关键词： TREx RGB green-line aurora auroral transport model

Localized-states quantum conf.nement induced by roughness in CdMnTe/CdTe heterostructures grown on Si(111) substrates

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Journal of.Semiconductors 2024年第9期45卷 28-35页

作者： Leonarde N.Rodrigues Wesley f.Inoch Marcos L.f.Gomes Odilon D.D.Couto Jr. Bráulio S.Archanjo Sukarno O.f.rreira Physics Department Federal University of ViçosaViçosa36570-900Minas GeraisBrazil Instituto de f.sica Gleb Wataghin Universidade Estadual de CampinasCampinas13083-859São PauloBrazil National Institute of.Metrology Quality and Technology(Inmetro) Materials Metrology Division(DIMAT)Xerém2525-020Rio de JaneiroBrazil

This work shows that despite a lattice mismatch of.almost 20%, CdMnTe/CdTe/CdMnTe heterostructures grown directly on Si(111) have surprisingly good optical emission properties. The investigated structures were grown by molecular beam epitaxy and characterized by scanning transmission electron microscopy, macro-and micro-photoluminescence. Low temperature macro-photoluminescence experiments indicate three emission bands which depend on the CdTe layer thickness and have dif.erent conf.nement characteristics. Temperature measurements reveal that the lower energy emission band (at 1.48 eV)is associated to def.cts and bound exciton states, while the main emission at 1.61 eV has a weak 2D character and the higher energy one at 1.71 eV has a well-def.ned (zero-dimensional, 0D) 0D nature. Micro-photoluminescence measurements show the existence of.sharp and strongly circularly polarized (up to 40%) emission lines which can be related to the presence of.Mn in the heterostructure. This result opens the possibility of.producing photon sources with the typical spin control of.the diluted magnetic semiconductors using the low-cost silicon technology.

关键词： CdMnTe/CdTe/CdMnTe heterostructure CdTe/CdMnTe quantum emitters quantum dot-like emission silicon(111)substrate

Mathematical modeling and simulations of.stress mitigation by coating polycrystalline particles in lithium-ion batteries

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Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 947-962页

作者： N.IQBAL J.CHOI S.f.SHAH C.LEE S.LEE Department of.Mechanical Roboticsand Energy EngineeringDongguk University-SeoulSeoul 04620Republic of Korea

A chemo-mechanical model is developed to investigate the ef.ects on the stress development of.the coating of.polycrystalline Ni-rich LiNixMnyCo_(z)O_(2)(x≥0.8)(NMC)particles with poly(3,4-ethylenedioxythiophene)(PEDOT).The simulation results show that the coating of.primary NMC particles signif.cantly reduces the stress generation by ef.iciently accommodating the volume change associated with the lithium dif.usion,and the coating layer plays roles both as a cushion against the volume change and a channel f.r the lithium transport,promoting the lithium distribution across the secondary particles more ***,the lower stif.ness,higher ionic conductivity,and larger thickness of.the coating layer improve the stress *** paper provides a mathematical f.amework f.r calculating the chemo-mechanical responses of.anisotropic electrode materials and f.ndamental insights into how the coating of.NMC active particles mitigates stress levels.

关键词： lithium-ion battery(LIB) polycrystalline particle coating f.nite element simulation Ni-rich LiNixMnyCo_(z)O_(2)(x>0.8)(NMC)

Asymmetric reversible structural switching of.a diene coordination polymer promoted by UV-visible light

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Science China Chemistry 2024年第2期67卷 536-541页

作者： Yong Wang Qiaoqiao Zhang Yong-Yong Cao Qi Liu Brendan f.Abrahams Jian-Ping Lang College of.Chemistry Chemical Engineering and MaterialsSoochow UniversitySuzhou215123China State Key Laboratory of.Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai200032China College of.Biological Chemical Science and EngineeringJiaxing UniversityJiaxing314001China School of.Chemistry University of MelbourneVictoria3010Australia

In natural and artif.cial systems,reversible reactions are commonly asymmetric with respect to the time scale and nature of.the stimuli which drive the f.rward and backward *** applications f.r which switching behavior is required,it is desirable that the reversible reaction goes as close to symmetric as possible;however,such systems are ***,we report an example of.ultraviolet(UV)-visible light-regulated asymmetric reversible structural switching involving a diene-based coordination polymer,CP1 and its monocyclobutane product,*** is possible to cycle at least ten times through a f.rward [2+2] photocycloaddition reaction and the reverse,photocleavage reaction.A single cycle can be completed within a f.w *** transf.rmation is accompanied by f.st and distinct f.uorescence changes,arising f.om optimisation of.the reaction *** f.nctional theory calculations allow rationalisation of.the asymmetric reversible transf.rmation between CP1 and CP1a rather than between CP1 and its dicyclobutane product *** work provides a clear illustration of.reversible structural switching which approaches symmetric behaviour with respect to reaction rate and *** insights gained f.om this work also assist in the design of.f.st,reversible switching materials.

关键词： asymmetrical reversible structural switching coordination polymer photocycloaddition UV-visible light-controlled f.uorescence switching

Omics-based biomarkers as usef.l tools in metabolic dysf.nctionassociated steatotic liver disease clinical practice:How f.r are we?

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World Journal of.Gastroenterology 2024年第14期30卷 1982-1989页

作者： Julieta Trinks María f.Mascardi Adrián Gadano Sebastián Marciano Instituto de Medicina Traslacional e Ingeniería Biomédica-Consejo Nacional de Investigaciones Científ.cas y Técnicas-Instituto Universitario del Hospital Italiano-Hospital Italiano de Buenos Aires Ciudad Autónoma de Buenos Aires C1199ACLArgentina Consejo Nacional de Investigaciones Científ.cas y Técnicas Ciudad Autónoma de Buenos Aires C1425FQBArgentina Liver Unit Hospital Italiano de Buenos AiresCiudad Autónoma de Buenos Aires C1199DFArgentina Department of.Research Hospital Italiano de Buenos AiresCiudad Autónoma de Buenos Aires C1199DFArgentina

Unmet needs exist in metabolic dysf.nction-associated steatotic liver disease(MASLD)risk *** ability to identif. patients with MASLD with advanced f.brosis and at higher risk f.r adverse outcomes is still *** novel biomarkers could represent a meaningf.l improvement to current risk *** this aim,omics technologies have revolutionized the process of.MASLD biomarker discovery over the past *** the research in this f.eld is thriving,much of.the publication has been haphazard,of.en using single-omics data and specimen sets of.convenience,with many identif.ed candidate biomarkers but lacking clinical validation and *** we incorporate these biomarkers to direct patients’management,it should be considered that the roadmap f.r translating a newly discovered omics-based signature to an actual,analytically valid test usef.l in MASLD clinical practice is rigorous and,theref.re,not easily *** article presents an overview of.this area’s current state,the conceivable opportunities and challenges of.omics-based laboratory diagnostics,and a roadmap f.r improving MASLD biomarker research.

关键词： Metabolic dysf.nction-associated steatotic liver disease Non-alcoholic steatohepatitis Biomarker Risk stratif.cation Omics

Threshold-Based Sof.ware-Def.ned Networking(SDN)Solution f.r Healthcare Systems against Intrusion Attacks

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Computer Modeling in Engineering & Sciences 2024年第2期138卷 1469-1483页

作者： Laila M.Halman Mohammed J.f.Alenazi Department of.Computer Engineering College of Computer ScienceKing Saud UniversityRiyadh11451Saudi Arabia

The healthcare sector holds valuable and sensitive *** amount of.this data and the need to handle,exchange,and protect it,has been increasing at a f.st *** to their nature,sof.ware-def.ned networks(SDNs)are widely used in healthcare systems,as they ensure ef.ective resource utilization,saf.ty,great network management,and *** this sector,due to the value of.thedata,SDNs f.ceamajor challengeposed byawide range of.attacks,such as distributed denial of.service(DDoS)and probe *** attacks reduce network perf.rmance,causing the degradation of.dif.erent key perf.rmance indicators(KPIs)or,in the worst cases,a network f.ilure which can threaten human *** can be signif.cant,especially with the current expansion of.portable healthcare that supports mobile and wireless devices f.r what is called mobile health,or *** this study,we examine the ef.ectiveness of.using SDNs f.r def.nse against DDoS,as well as their ef.ects on dif.erent network KPIs under various *** propose a threshold-based DDoS classif.er(TBDC)technique to classif. DDoS attacks in healthcare SDNs,aiming to block traf.ic considered a hazard in the f.rm of.a DDoS *** then evaluate the accuracy and perf.rmance of.the proposed TBDC *** technique shows outstanding perf.rmance,increasing the mean throughput by 190.3%,reducing the mean delay by 95%,and reducing packet loss by 99.7%relative to normal,with DDoS attack traf.ic.

关键词： Network resilience network management attack prediction sof.ware def.ned networking(SDN) distributed denial of.service(DDoS) healthcare

Adsorption of.pharmaceutical pollutants on ZnCl_(2)-activated biochar f.om corn cob:Ef.iciency,selectivity and mechanism

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Journal of.Bioresources and Bioproducts 2024年第1期9卷 58-73页

作者： Christian f.Varela L.C.Moreno-Aldana Yazmin Yaneth Agámez-Pertuz Department of.Chemistry National University of ColombiaAv.Carrera 30 No.45-03BogotáD.C.Colombia Department of.Biology and Chemistry University of the Llanoskm 12 road to Puerto LópezVillavicencioColombia

The occurrence of.pharmaceuticals in water bodies and drinking water poses risks f.r the envi-ronment and human health,thus it is necessary to study methodologies that allow the ef.icient removal of.these *** this work,corn cob-derived biochar was obtained by ZnCl_(2)-activation,and subsequent carbonization at 700℃.The ef.ect of.contact time,temperature,pH,and initial concentration on the adsorption capacity of.acetaminophen(ACE)and amoxicillin(AMX)was determined through batch *** addition,the kinetics,isotherms,and ther-modynamics parameters were *** activated biochar exhibited a maximum adsorp-tion capacity of.332.08 mg/g f.r ACE and 175.86 mg/g f.r *** adsorption kinetics and adsorption isotherm of.ACE corresponded to the pseudo-second order and Langmuir model,***,pseudo-f.rst-order kinetics and the f.eundlich isotherm model were well-f.tted to AMX *** ACE and AMX co-adsorption had a synergistic ef.ect on AMX but an antagonistic ef.ect on ACE removal,achieving a maximum adsorption capacity of.193.51 and 184.58 mg/g,*** the other hand,f.xed-bed column experiments showed that the adsorption capacity depends on the inf.uent concentration,and the breakthrough curve f.ts the Thomas and Yoon-Nelson *** mechanism adsorption studies showed that surf.ce inter-actions(hydrogen bonding f.rmation and n-𝜋interactions)are the main driving f.rces f.r the adsorption process,and pore f.lling is the rate-limiting *** this way,the prepared biochar exhibits a high potential f.r the adsorption of.pharmaceutical compounds f.om water.

关键词： Biochar Adsorption Acetaminophen Amoxicillin Wastewater treatment

Ef.ects of.synthesis parameters on the perf.rmance of.crosslinked Co-polymers with clays f.r conf.rmance control

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Petroleum Research 2024年第1期9卷 98-108页

作者： A.A.Roslan N.A.A.Aziz N.f.A.Deraman I.Dzulkarnain Petroleum Engineering Department Centre of Research Enhanced Oil Recovery(COREOR)Universiti Teknologi PETRONASSeri IskandarPerakMalaysia Chemical Engineering Department Centre of Research Enhanced Oil Recovery(COREOR)Universiti Teknologi PETRONASSeri IskandarPerakMalaysia

Conf.rmance control or water shut-of. is a technique used to improve oil *** conf.rmance control,polymers block high permeability water areas and redistribute water drive toward unswept oil *** this study,co-polymers(denoted ATP-PGV/AM-co-AMPS)were synthesized using acrylamide(AM)and 2-acrylamide-2-methylpropane sulf.nic acid(AMPS)as the monomers,polyethylene glycol(PEG)-200 and methylenebisacrylamide(MBA)as the crosslinkers,attapulgite(ATP)and bentonite(PGV)as the clay types,and ammonium persulf.te(APS)as the initiator,in addition to paraf.in oil and *** were synthesized using inverse emulsion polymerization with dif.erent concentrations of.monomers,crosslinkers,and clays,and they were characterized using f.urier-transf.rm inf.ared(f.IR)spectroscopy and scanning electron microscopy(SEM)with energy dispersive X-ray spectroscopy(EDX).f.IR spectra of.the samples conf.rmed the existence of.sulf.nate and hydroxyl groups,which are important f.r polymer ***-EDX images indicated that the morphology and elemental composition were dif.erent bef.re and af.er swelling,conf.rming the occurrence of.***,samples were placed in sodium chloride solution(20,000 ppm)f.r 7 days to evaluate swelling at both room temperature and 90°*** analysis(TGA)and dif.erential scanning calorimetry(DSC)were used to determine the thermal characteristics of.the ***,rheological measurements were used to assess the def.rmation and rheological behavior of.the *** results showed that af.er 1 day,good swelling without loss of.mechanical strength was achieved with the composite synthesized using 10%AM,15%AMPS,6%PGV,and 10%ATP.

关键词： Polymer Clay Water shut-of. Conf.rmance Swelling

Classical taxonomy,molecular phylogeny and genetic analysis of.the genus Exitianus Ball,1929(Hemiptera:Cicadellidae:Deltocephalinae)f.om Egypt

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Zoological Systematics 2024年第2期49卷 143-157页

作者： Rabab M.El-Hady Ahmed f.El-Sayed Survey&Taxonomy Department Plant Protection Research InstituteAgriculture Research CentreGizaEgypt Microbial Genetics Department Biotechnology Research InstituteNational Research CentreGizaEgypt Egypt Center f.r Research and Regenerative Medicine(ECRRM) CairoEgypt

Egyptian species of.the leaf.opper genus Exitianus Ball,1929,***(St?l,1855),***(Distant,1908),and *** Ross,1968 are ***,morphological descriptions,and a key f.r their identif.cation are *** this study,we used molecular techniques to conf.rm morphological identif.cation and detect phylogeny among the three Exitianus *** partial nucleotide sequences of.the amplif.ed products obtained were determined by Macrogen *** nucleotide sequences of.28S rDNA and COX genes of.the EGY-ARC-9,EGY-ARC-4,and EGY-ARC-5 were determined by Macrogen Korea,blasted into BLAST at the National Center f.r Biotechnology Inf.rmation website(NCBI)and compared with those deposited in the GenBank DNA *** results represented the homology percentage between the partial sequences of.the 28S rRNA and COX genes f.om each species and related species obtained f.om GenBank DNA *** morphological identif.cations of.the three Exitianus species were conf.rmed by molecular characterization and sequencing of.28S rDNA and COX genes and identif.ed as ***,***,and ***,their sequences of.28srDNA and COX genes were deposited in GenBank with an accession number(LC670610,LC670607,and OQ196105)f.r 28srDNA gene and(LC775357,LC775358,and LC775359)f.r the COX gene.

关键词： Auchenorrhyncha Chaismini taxonomic 28S rDNA phylogenetic