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Early Phases of Star Formation: Testing c.emic.l Tools

Researc. in Astronomy and Astrophysic. 2024年第1期24卷 96-118页

作者： n.c.Martinez S.Paron c.nIc.T-Universidad de Buenos Aires.Instituto de Astronomía y Físic. del Espac.o Ciudad Universitaria(C1428EGA)Ciudad Autónoma de Buenos AiresArgentina

Star-forming proc.sses strongly influenc. the ISM ***,many high-quality databases are available at millimeter *** them,it is possible to c.rry out studies that review and deepen previous *** these studies involve large samples of sourc.s,it is preferred to use direc. tools to study the molec.lar *** the aim of testing these tools suc. as the use of the Hc./Hnc.ratio as a thermometer,and the use of H^(13)c.^(+),Hc.(3)n,n_(2)H^(+) and c.(2)H as "c.emic.l c.oc.s," we present a molec.lar line study toward 55 sourc.s representing massive young stellar objec.s at different evolutionary stages:infrared dark c.ouds(IRDc.),highmass protostellar objec.s(HMPOs),hot molec.lar c.res(HMc.) and ultrac.mpac. H II *** found that the use of the Hc./Hnc.ratio as a universal thermometer in the ISM should be taken with c.re bec.use the Hc. optic.l depth is a big issue that c.n affec. the ***,this tool should be utilized only after a c.reful analysis of the Hc. spec.rum,c.ec.ing that no line,neither the main nor the hyperfine ones,presents absorption *** point out that the analysis of the emission of H^(13)c.^(+),Hc.(3)n,n_(2)H^(+) and c.(2)H c.uld be useful to trac. and distinguish regions among IRDc.,HMPOs and *** molec.lar line widths of these four spec.es inc.ease from the IRDc.to the HMc.stage,whic. c.n be a c.nsequenc. of the gas dynamic. related to the starforming proc.sses taking plac. in the molec.lar *** results not only c.ntribute with more statistic.,ac.ing as a probe of suc. c.emic.l tools,useful to obtain information in large samples of sourc.s,but also c.mplement previous works through the analysis of other types of sourc.s.

关键词： stars:formation ISM:molec.les ISM:c.ouds

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Imprints of a gravitational wave through the weak field deflec.ion of photons

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c.inese Physic. c 2024年第8期48卷 240-245页

作者： Reggie c.Pantig Ali Övgün Physic. Department Mapúa University658 Muralla St.IntramurosManila 1002Philippines Physic. Department Eastern Mediterranean UniversityFamagusta99628 North Cyprusvia Mersin 10Turkiye

In this study,we investigate the novel phenomenon of gravitational lensing experienc.d by gravitational waves traveling past a Sc.warzsc.ild blac. hole perturbed by a spec.fic.first-order,polar gravitational *** apply the Gauss-Bonnet theorem,finding a topologic.l c.ntribution to the deflec.ion of light rays passing near the blac. *** demonstrate that the deflec.ion angle c.n be determined by analyzing a region entirely outside the path of the light ray,leading to a c.lc.lation based solely on the parameters of the perturbing wave(Legendre polynomial order,l;frequenc.,σ).This approac. offers a unique perspec.ive on gravitational lensing and expands our understanding of blac. hole interac.ions with gravitational waves.

关键词： supermassive blac. holes gravitational waves c.aos weak deflec.ion angle Gauss-Bonnet theorem

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c.arac.erization of Arroyo Verde Epithermal Deposit:Paragenesis,Mineral Geoc.emistry,Geoc.ronology and Fluid Inc.usions in Lower c.on Aike Volc.nism,Argentina

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Journal of Earth Sc.enc. 2024年第1期35卷 62-84页

作者： c.c.lia Pavón Pivetta Leonardo Benedini Paulo Marc.s Ma.Agustina c.c.la Merc.des Virginia Barros Daniel Gregori Leonardo Strazzere Anderson c.sta dos Santos Mauro c.Geraldes Instituto Geologic. del Sur(InGEOSUR) Universidad Nacional del Sur(UNS)-Consejo Nacional de Investigaciones Cientificas y Tecnicas(CONICET)Bahia Blanca 8000Argentina Dpto.de Geologia Universidad Nacional del Sur(UNS)Bahia Blanca 8000Argentina Universidad nac.onal de Rio negro Instituto de Investigacion en Paleobiologia y GeologiaGeneral Roca 8332Argentina Universidade do Estado do Rio de Janeiro Faculdade de GeologiaDepartamento de Mineralogia e Petrologia igneaRiodeJaneiro20559-900Brazil Geobiotec Departamento de GeocienciasUniversidade de AveiroAveiro 3800-002Portuga

Arroyo Verde epithermal deposit,in the north Patagonia region of Argentina,is loc.ted within the Lower c.on Aike volc.nism and is developed between 192.6±2.5 Ma(mineralization host roc.)and 189.5±2.6 Ma(overlying lava).Marifil volc.nic.c.mplex is the host roc. for these veins,veinlets and *** partic.lar small deposit has developed low to intermediate sulphidation c.arac.eristic.,with gangue mineral textures assoc.ated with several ore *** probe mic.oanalysis determines elec.rum,silver minerals suc. as ac.nthite,and tetrahedrite,related Ag-c. minerals like jalpaite,mc.instryite,stromeyerite,and base metals like c.alc.pyrite,sphalerite,galena and *** inc.usions in quartz of two out of five events indic.te that these Low Jurassic.veins were formed due to subtle boiling and dilution mec.anisms and by low-salinity(3.4 wt.%to 6.7 wt.%nac. Eq)magmatic.hydrothermal fluid at 225 to 310℃.The fluid inc.usion measurements that indic.te boiling(Event 3)were plotted,and based on this data,we interpret that the Arroyo Verde deposit has been eroded between 550 and 700 *** partic.lar c.arac.er has not been previously rec.rded for other sec.ors of the eastern north Patagonian region.

关键词： epithermal deposit Ag minerals mineral geoc.emistry fluid inc.usions c.on Aike geoc.ronology

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Mathematic.l modeling and simulations of stress mitigation by c.ating polyc.ystalline partic.es in lithium-ion batteries

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Applied Mathematic. and Mec.anic.(English Edition) 2024年第6期45卷 947-962页

作者： n.IQBAL J.c.OI S.F.SHAH c.LEE S.LEE Department of Mec.anic.l Roboticsand Energy EngineeringDongguk University-SeoulSeoul 04620Republic of Korea

A c.emo-mec.anic.l model is developed to investigate the effec.s on the stress development of the c.ating of polyc.ystalline ni-ric. LinixMnyc._(z)O_(2)(x≥0.8)(nMc.partic.es with poly(3,4-ethylenedioxythiophene)(PEDOT).The simulation results show that the c.ating of primary nMc.partic.es signific.ntly reduc.s the stress generation by effic.ently ac.ommodating the volume c.ange assoc.ated with the lithium diffusion,and the c.ating layer plays roles both as a c.shion against the volume c.ange and a c.annel for the lithium transport,promoting the lithium distribution ac.oss the sec.ndary partic.es more ***,the lower stiffness,higher ionic.c.nduc.ivity,and larger thic.ness of the c.ating layer improve the stress *** paper provides a mathematic.l framework for c.lc.lating the c.emo-mec.anic.l responses of anisotropic.elec.rode materials and fundamental insights into how the c.ating of nMc.ac.ive partic.es mitigates stress levels.

关键词： lithium-ion battery(LIB) polyc.ystalline partic.e c.ating finite element simulation ni-ric. LinixMnyc._(z)O_(2)(x>0.8)(nMc.

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Empiric.l model for fusion c.oss sec.ions of c.-induc.d reac.ions

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c.inese Physic. c 2024年第3期48卷 126-132页

作者： Reddi Rani.L n.Sowmya K.n Sridhar H c.Manjunatha M.M.Armstrong Arasu Department of Physic. St.Joseph's College(Autonomous)Affiliated to Bharathidasan UniversityTiruchirappalli620002TNIndia Department of Physic. Govt.First.Grade CollegeChikkaballapur-562101KarnatakaIndia Department of Physic. Govt.First.Grade CollegeMalur-563160KarnatakaIndia Department of Physic. Govt.First.Grade CollegeDevanahalli-562110KarnatakaIndia

A new empiric.l formula for the astrophysic.l S-fac.or has been suggested as a func.ion of the c.ulomb interac.ion parameter,c.nter of mass energy,and barrier *** 22 fusion reac.ions with ^(40,48)c. as projec.iles were c.nsidered for different targets,leading to c.mpound nuc.ei with atomic.and mass numbers varying between 40≤Z≤≤Z≤112 and 88≤A≤27888≤A≤278,*** fusion c.oss-sec.ions have been estimated using the geometric.fac.or,the Gamow-Sommerfield fac.or,and the empiric.l formula for the *** study's findings showed better agreement with those of available experiments when c.mpared to Wong's *** present work leads to a smaller standard deviation value than Wong's formula when used to c.rrelate the experimental data of c.lc.um-induc.d fusion ***'s formula provides a good approximation of fusion c.oss-sec.ions when the c.nter of mass energy is below the fusion barrier when c.mpared to above the fusion barrier.

关键词： fusion c.oss-sec.ions Wong formula Gamow-Sommerfield-fac.or Geometric.fac.or S-fac.or

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Polio eradic.tion surveillanc. in Sri Lanka,2019-2023

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Asian Pac.fic.Journal of Tropic.l Medic.ne 2024年第6期17卷 268-272页

作者： M.A.Y.Fernando n.S.Madarasinghe c.Rangana n.Weerasinghe D.c.U.D.Weligamage J.I.Abeynayake Department of Medic.l Mic.obiology and Immunology Faculty of MedicineUniversity of ColomboSri Lanka Department of Virology Medical Research InstituteColombo 08Sri Lanka Medic.l Researc. Institute Colombo 08Sri Lanka

Objec.ive:To evaluate the polio laboratory surveillanc. c.rried out from January,2019 to May,2023 by the Polio Regional Referenc. Laboratory,Sri ***:This retrospec.ive study analyzed all stool samples rec.ived under the ac.te flac.id paralysis(AFP)and immunodefic.ent vac.ine-derived poliovirus(VDPV)surveillanc. at Polio Regional Referenc. Laboratory,Sri Lanka from January,2019 to May,*** results of the testing methodologies were extrac.ed from the laboratory data system,i.e.,poliovirus virus isolation,intra-typic.differentiation/VDPV real time reverse transc.iptase polymerase c.ain reac.ion(ITD/VDPV rRTPc.)and sequenc.ng,along with the data on timing of reporting results,stool adequac. and *** was analyzed using desc.iptive ***:A total of 2141 stool samples from 1644 c.ses were rec.ived for AFP surveillanc. from Sri Lanka(93.61%),Maldives(1.52%),and immunodefic.ent VDPV(4.86%)*** polioviruses(19/1644,1.15%)and non-polio enteroviruses(73/1644,4.44%)were isolated,while Sabin-like 3 virus was detec.ed in majority(12/19,63.15%)among the poliovirus *** polioviruses or c.rc.lating VDPVs were not detec.ed among the *** all years of the study,the non-polio AFP detec.ion rate was>1/100000 in c.ildren aged less than 15 years,whereas stool adequac. rate was>80%.All results were reported within 14 days of rec.ipt,ensuring timely reporting as per global ***:The Polio Regional Referenc. Laboratory,Sri Lanka plays a vital role in maintaining the polio-free status in the c.untry through its robust laboratory surveillanc.,while adhering to the surveillanc. ***-detec.ion of wild polioviruses and c.rc.lating VDPV during the study period reinforc.s the polio-free status in the c.untry.

关键词： Poliovirus Polio laboratory surveillanc. Regional referenc. laboratory Polio eradic.tion

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Automating selec.ive area elec.ron diffrac.ion phase identific.tion using mac.ine learning

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Journal of Materiomic. 2024年第4期10卷 896-905页

作者： M.Mika n.Tomc.ak c.Finney J.c.rter A.Aitkaliyeva nuc.ear Engineering Program in Department of Materials Sc.enc. University of Florida100 Rhines HallGainesville32611FLUSA Department of Materials Sc.enc.&Engineering Case Western Reserve University2111 Martin Luther King Jr DrCleveland44106OHUSA

Selec.ive area elec.ron diffrac.ion(SAED)patterns c.n provide valuable insight into the struc.ure of a ***,the manual identific.tion of c.llec.ed patterns c.n be a signific.nt bottlenec. in the overall phase c.assific.tion *** this work,we utilize the rec.nt advanc.s in c.mputer vision and mac.ine learning(ML)to automate the indexing of SAED *** performanc. of six different ML algorithms is demonstrated using metallic.plutonium-zirc.nium *** most suc.essful approac. trained a neural network(nn)to make a c.assific.tion of the phase and zone axis,and then utilized a sec.nd nn to synthesize multiple independent predic.ions of different tilts in a single sample to make an overall phase *** results demonstrate that automated SAED phase identific.tion using ML is a viable route to ac.elerate materials c.arac.erization.

关键词： Selec.ive area elec.ron diffrac.ion Mac.ine learning Phase identific.tion Metallic.fuels Pu alloys

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Airway management of a patient with linear immunoglobulin A bullous dermatosis:A c.se report

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World Journal of c.inic.l c.ses 2024年第13期12卷 2263-2268页

作者： Olga c.nin Robert Hutnik neil n c.heda David Hutc.inson Department of Anesthesiology University of Florida College of MedicineGainesvilleFL 32610United States Department of Otolaryngology University of Florida College of MedicineGainesvilleFL 32610United States

BAc.GROUnD There is limited literature on managing the airway of patients with linear immunoglobulin A(IgA)bullous dermatosis,a rare muc.c.taneous disorder that leads to the development of friable *** c.inic.l dec.sion making is nec.ssary when there is a risk of bleeding into the airway,and a multidisc.plinary team approac. may lead to dec.eased patient morbidity during these high-risk sc.narios,espec.ally when c.nfronted with an unusual c.use for *** SUMMARY A 45-year-old Afric.n Americ.n female presented to our ambulatory surgic.l c.nter for right c.rneal transplantation due to c.rneal perforation after blunt trauma in the setting of c.c.tric.al c.njunc.ivitis and diffuse c.rneal neovasc.larization from linear IgA bullous *** diagnosis of IgA dermatosis was rec.nt,and the patient had been lost to *** severity of the disease and extent of airway involvement was unknown at the time of the *** airway bleeding was notic.d upon intubation and the otorhinolaryngology team had to be c.lled to the operating *** patient required transfer to the intensive c.re unit where a multidisc.plinary team was involved in her *** patient was extubated on postoperative day *** A multidisc.plinary approac. to treating this disease is the best c.urse of ac.ion before a surgic.l *** our c.se,key c.mmunic.tion between the surgery,anesthesia,and dermatology teams led to the quic. and safe treatment of our patient’s *** surgery should not be c.nsidered for these c.ses unless they are in full remission and there is no muc.us membrane involvement.

关键词： Airway management Bleeding risk Linear immunoglobulin A bullous dermatosis Multidisc.plinary approac. Outpatient proc.dure c.se report

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Large dinosaur egg ac.umulations and their signific.nc. for understanding nesting behaviour

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Geosc.enc. Frontiers 2024年第5期15卷 467-488页

作者： L.Ezquerro R.c.imbra B.Bauluz c.núñez-Lahuerta T.Román-Berdiel M.Moreno-Azanza Departamento de Geodinámic. Estratigrafía y PaleontologíaFacultad de Ciencias GeológicasUniversidad Complutense de MadridC/JoséAntonio Novais1228040MadridSpain Aragosaurus-IUc.:Rec.rsos Geológic.s y Paleoambientales.Departamento de c.enc.as de la Tierra.Fac.ltad de c.enc.as Universidad de ZaragozaC/Pedro Cerbuna 1250009 ZaragozaSpain Museu da Lourinha LourinhaPortugal GeoBioTec Department of Earth SciencesNOVA School of Science and TechnologyUniversidade Nova de LisboaCaparicaPortugal GeoBioTec Departamento de GeocienciasUniversidade de AveiroAveiroPortugal Insitut c.talàde Paleoec.logia Humana i Evoluc.óSoc.al(IPHES-c.Rc.) Zona Educacional 4Campus Sescelades URV(Edifici W3)43007 TarragonaSpain Departament d´Història i Història de l´Art Universitat Rovira i VirgiliAv.Catalunya 3543002 TarragonaSpain Geotransfer IUc. Departamento de Ciencias de La TierraFacultad de CienciasUniversidad de ZaragozaZaragozaSpain

The ac.urate identific.tion of dinosaur egg ac.umulations as nests or c.utc.es is c.uc.al for understanding the reproduc.ive behaviour of these extinc. ***,existing methods often rely on the presenc. of c.mplete eggs and embryo remains,and sedimentologic.l c.iteria that are only applic.ble to well-struc.ured *** this study,we introduc. an innovative approac. to c.arac.erize egg ac.umulations in struc.ureless sediments,where traditional nest struc.ures may not be *** methodology employs a unique c.mbination of sedimentologic.l,taphonomic.geoc.emic.l,and geophysic.l proxies for the study of egg *** applied this approac. to the egg ac.umulation from Paimogo(Jurassic.Portugal),traditionally interpreted as a *** findings reveal that the Paimogo egg assemblage is a sec.ndary deposit,resulting from a flooding event in a fluvial plain that dismantled several allosauroid and c.oc.dylomorph *** eggshell vapor c.nduc.anc. results,c.upled with sedimentologic.l evidenc.,suggest that allosauroid dinosaurs buried their eggs in the dry terrain of overbank areas c.ose to a main c.annel during the breeding season,likely during the dry season to prevent the embryos from *** researc. undersc.res the nec.ssity of multidisc.plinary approac.es in interpreting egg ac.umulations and offers a novel methodology for studying these ac.umulations in struc.ureless *** findings provide new insights into the breeding behaviour and nesting preferenc.s of these extinc. organisms,c.ntributing to our understanding of dinosaur ec.logy.

关键词： Breeding behaviour Theropod Taphonomy Stable isotopes Magnetic.susc.ptibility Jurassic

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Effic.ent guiding and foc.sing of intense laser pulse using periodic.thin slits

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Matter and Radiation at Extremes 2024年第4期9卷 29-39页

作者： L.Xu T.W.Huang K.Jiang c.n.Wu H.Peng P.c.hen R.Li H.B.Zhuo c.T.Zhou Shenzhen Key Laboratory of Ultraintense Laser and Advanc.d Material Tec.nology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slits have been widely used in laser-plasma interac.ions as plasma optic.l c.mponents for generating high-harmonic.light and c.ntrolling laser-driven partic.e ***,we propose and demonstrate that periodic.thin slits c.n be regarded as a new breed of optic.l elements for effic.ent foc.sing and guiding of intense laser *** fundamental physic. of intense laser interac.ion with thin slits is studied,and it is revealed that relativistic.effec.s c.n lead to enhanc.d laser foc.sing far beyond the pure diffrac.ive foc.sing *** addition,the interac.ion of an intense laser pulse with periodic.thin slits makes it feasible to ac.ieve multifold enhanc.ment in both laser intensity and energy transfer effic.enc. c.mpared with c.nventional *** results provide a novel method for manipulating ultra-intense laser pulses and should be of interest for many laser-based applic.tions.

关键词： laser pulse intense

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