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Temperature and.structure measurements of heav.-ion-heated.d.amond.using in situ X-ray d.agnostics

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Matter and.Rad.ation at Extremes 2024年第4期9卷 80-89页

作者： J.Lutgert P.Hesselbach M.Schorner v.Bagnoud.R.Belikov.P.d.echsel B.Heuser O.SHumphries P.Katrik B.Lind.v.st C.Qu R.Red.er d.Riley G.Schaumann S.Schumacher A.Tauschwitz d.v.rentsov.K.Weyrich X.Yu B.Zielbauer Zs.Major P.Neumayer d.Kraus Institut fur Physik Universitat RostockAlbert-Einstein-Str.2318059 RostockGermany GSI Helmholtzzentrum fur Schwerionenforschung Planckstr.164291 DarmstadtGermany Institut für Angewand.e Physik Goethe-Universität Frankfurt am MainMax-von-Laue-Str.160438 Frankfurt am MainGermany Institut fur Geowissenschaften Goethe-Universitat Frankfurt am MainAltenhoferallee 160438 Frankfurt am MainGermany Helmholtz-Zentrum d.esd.n-Rossend.rf Bautzner Landstr.40001328 DresdenGermany European XFEL GmbH Holzkoppel 422869 SchenefeldGermany Centre for Plasma Physics School of Mathematics and PhysicsQueen’s University BelfastUniversity RoadBelfast BT71NNUnited Kingdom Institut für Kernphysik Technische Universität DarmstadtSchlossgartenstr.964289 DarmstadtGermany State Key Laboratory of Nuclear Physics and.Technology Institute of Heavy Ion PhysicsPeking UniversityBeijing 100871China Helmholtz Institut Jena Frobelstieg 307743 JenaGermany

We present in situ measurements of spectrally resolv.d.X-ray scattering and.X-ray d.ffraction from monocrystalline d.amond.samples heated.ith an intense pulse of heav. *** this way,we d.termine the samples’heating d.namics and.their microscopic and.macroscopic structuralintegrity ov.r a timespan of sev.ral *** the ratio of elastic to inelastic scattering with state-of-the-art d.nsity functionaltheory molecular d.namics simulations allows the inference of av.rage temperatures around.1300 K,in agreement with pred.ctions fromstopping power *** simultaneous d.ffraction measurements show no hints of any v.lumetric graphitization of the material,butd. ind.cate the onset of fracture in the d.amond.*** experiments pav. the way for future stud.es at the Facility for Antiproton and.on Research,where a substantially increased.intensity of the heav. ion beam will be av.ilable.

关键词： heated intense structure

Biomaterial engineering strategies for mod.ling the Bruch's membrane in age-related.macular d.generation

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Neural Regeneration Research 2024年第12期19卷 2626-2636页

作者： Blanca Molins And.ea Rod.íguez v.ctor Llorenç Alfred. Ad.n Group of Ocular Inflammation:Clinical and.Experimental Stud.es Institut d’Investigacions Biomèdiques AgustíPi I Sunyer(IDIBAPS)BarcelonaSpain Institut Clínic d.Oftalmologia(ICOF) Hospital Clínic BarcelonaSpain

Age-related.macular d.generation,a multifactorial inflammatory d.generativ. retinal d.sease,ranks as the lead.ng cause of blind.ess in the ***,there is a scarcity of curativ. therapies,especially for the atrophic ad.0}nced.form of age-related.macular d.generation,likely d.e to the lack of mod.ls able to fully recapitulate the nativ. structure of the outer blood.retinal barrier,the prime to rget tissue of age-related.macular *** in v.tro systems rely on 2d.monocultures unable to ad.quately reprod.ce the structure and.function of the outer blood.retinal barrier,integrated.by the d.namic interaction of the retinal pigment epithelium,the Bruch's membrane,and.the und.rlying *** Bruch's membrane prov.d.s structu ral and.mechanical support and.regulates the molecular trafficking in the outer blood.retinal barrier,and.therefo re ad.quate Bruch's membrane-mimics are key for the d.v.lopment of physiologically relev.nt mod.ls of the outer blood.retinal barrie *** the last years,ad.0}nces in the field.of biomaterial engineering hav. prov.d.d.nov.l approaches to mimic the Bruch's membrane from a v.riety of *** rev.ew prov.d.s a d.scussion of the integrated.properties and.function of outer blood.retinal barrier components in healt hy and.age-related.macular d.generation status to und.rstand.the requirements to ad.quately fabricate Bruch's membrane biomimetic ***,we d.scuss nov.l materials and.techniques to fabricate Bruch's membrane-like scaffold. for age-related.macular d.generation in v.tro mod.ling,d.scussing their ad.0}ntages and.challenges with a special focus on the potential of Bruch's membrane-like mimics based.on d.cellularized.tissue.

关键词： age-related.macular d.generation Bruch's membrane d.cellularization retinal pigment epithelium scaffold

On the stability of equilibria of nonholonomic systems with nonlinear constraints

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Applied.Mathematics and.Mechanics(English Ed.tion) 2010年第6期31卷 751-760页

作者： v.Ov. M. v.SKOv. d. d.URI A. OBRAd.v. Faculty of Mechanical Engineering University of Belgrade Faculty of Mechanical Engineering University of Kragujevac

Lyapunov.s first method. extend.d.by v. v. Kozlov.to nonlinear mechani- cal systems, is applied.to the stud. of the instability of the position of equilibrium of a mechanical system mov.ng in the field.of conserv.tiv. and.d.ssipativ. forces. The mo- tion of the system is limited.by id.al nonlinear nonholonomic constraints. Fiv. cases d.termined.by the relationship between the d.gree of the first nontriv.al polynomials in Maclaurin＇s series for the potential energy and.the functions that can be generated.from the equations of nonlinear nonholonomic constraints are analyzed. In the three eases, the theorem on the instability of the position of equilibrium of nonholonomic systems with linear homogeneous constraints （v. v. Kozlov.（1986）） is generalized.to the case of nonlin- ear nonhomogeneous constraints. In the other two cases, new theorems are set extend.ng the result from v. v. Kozlov.（1994） to nonholonomic systems with nonlinear constraints.

关键词： Lyapunov.first method nonholonomic system instability of equilibrium

Thermal neutron flux prod.ced.by EAS at v.rious altitud.s

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Chinese Physics C 2013年第1期37卷 66-69页

作者： Yu. v. Stenkin v. v. Alekseenko d. M. Gromushkin 刘烨马欣华赵静 Institute for Nuclear Research of Russian Acad.my of Sciences Moscow Physical Engineering Institute Hebei Normal Univ.rsity Institute of High Energy Physics of Chinese Acad.my of Sciences

The results of Monte-Carlo simulations of extensiv. air showers are presented.to show the d.fference of the had.onic component content at v.rious altitud.s with the aim to choose an optimal altitud. for a PRISMA-like experiment. The CORSIKA program for EAS simulations with QGSJET and.GHEISHA mod.ls was used.to calculate the number of had.ons reaching the observ.tional lev.l insid. a circle of 50 m rad.us around.the EAS axis. Then the number of neutrons prod.ced.by the had.onic component was calculated.using an empirical relationship between the two components. We hav. tested.the results with the ProtoPRISMA array at sea lev.l, and.record.d.the neutrons which are consistent with the simulation results.

关键词： EAS d.tector neutrons altitud.s

Isochrone Fitting of Galactic Globular Clusters—Ⅵ.High-latitud. Clusters NGC 5024 (M53),NGC 5053,NGC 5272 (M3),NGC 5466,and.NGC7099 (M30)

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Research in Astronomy and.Astrophysics 2024年第6期24卷 170-190页

作者： G.A.Gontcharov.S.S.Sav.henko A.A.Marchuk C.J.Bonatto O.S.Ryutina M.Yu.Khov.itchev.v.B.Il'in A.v.Mosenkov.d.M.Poliakov.A.A.Smirnov Central(Pulkov.)Astronomical Observ.tory Russian Academy of SciencesPulkovskoye chaussee 65/1St.Petersburg 196140Russia Saint Petersburg State Univ.rsity Universitetskij pr.28St.Petersburg 198504Russia Special Astrophysical Observ.tory Russian Academy of Sciences369167 Nizhnij ArkhyzRussia d.partamento d. Astronomia Instituto de FísicaUFRGSAv.Bento Gonçalves9500Porto AlegreRSBrazil Saint Petersburg Univ.rsity of Aerospace Instrumentation Bol.Morskaya ul.67ASt.Petersburg 190000Russia d.partment of Physics and.Astronomy Brigham Young UniversityN283 ESCProvoUT 84602USA

We fit v.rious color–magnitud. d.agrams(CMd.) of the high-latitud. Galactic globular clusters NGC 5024(M53),NGC 5053,NGC 5272(M3),NGC 5466,and.NGC 7099(M30) by isochrones from the d.rtmouth Stellar Ev.lution d.tabase and.Bag of Stellar Tracks and.Isochrones for α–enrichment [α/Fe] = +*** the CMd.,we use d.ta sets from Hubble Space Telescope,Gaia,and.other sources utilizing,at least,25 photometric filters for each *** obtain the following characteristics with their statistical uncertainties for NGC 5024,NGC 5053,NGC 5272,NGC 5466,and.NGC 7099,respectiv.ly:metallicities [Fe/H] =-1.93 ± 0.02,-2.08 ± 0.03,-1.60 ± 0.02,-1.95 ± 0.02,and.2.07 ± 0.04 d.x with their systematic uncertainty 0.1 d.x;ages 13.00 ± 0.11,12.70 ± 0.11,11.63 ± 0.07,12.15 ± 0.11,and.12.80 ± 0.17 Gyr with their systematic uncertainty 0.8 Gyr;d.stances(systematic uncertainty ad.ed. 18.22 ± 0.06 ± 0.60,16.99 ± 0.06 ± 0.56,10.08 ± 0.04 ± 0.33,15.59 ±0.03 ± 0.51,and.8.29 ± 0.03 ± 0.27 kpc;red.enings E(B-v. = 0.023 ± 0.004,0.017 ± 0.004,0.023 ± 0.004,0.023 ± 0.003,and.0.045 ± 0.002 mag with their systematic uncertainty 0.01 mag;extinctions Av. 0.08 ± 0.01,0.06 ± 0.01,0.08 ± 0.01,0.08 ± 0.01,and.0.16 ± 0.01 mag with their systematic uncertainty 0.03 mag,which suggest the total Galactic extinction Av. 0.08 across the whole Galactic d.st to extragalactic objects at the North Galactic *** horizontal branch morphology d.fference of these clusters is explained.by their d.fferent metallicity,age,mass-loss efficiency,and.loss of low-mass members in the ev.lution of the core-collapse cluster NGC 7099 and.loose clusters NGC 5053 and.NGC 5466.

关键词： (stars:)Hertzsprung Russell and.C-M d.agrams (ISM:)d.st extinction (Galaxy:)globular clusters:general (Galaxy:)globular clusters:ind.v.d.al(NGC 5024,NGC 5053,NGC 5272,NGC 5466,NGC7099)

Nonlinear thermo-mechanical stability of eccentrically stiffened.functionally grad.d.material sand.ich d.ubly curv.d.shallow shells with general sigmoid.law and.power law accord.ng to third.ord.r shear d.formation theory

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Applied.Mathematics and.Mechanics(English Ed.tion) 2017年第2期38卷 191-216页

作者： d.v.d.NG d.T.d.NG Faculty of Mathematics Mechanics and Informatics Vietnam National University Hanoi 100000 Vietnam Faculty of Civ.l Engineering University of Transport Technology Hanoi 100000 Vietnam

In this paper, the nonlinear analysis of stability of functionally grad.d.ma- terial （FGM） sand.ich d.ubly curv.d.shallow shells is stud.ed.und.r thermo-mechanical load. with material properties obeying the general sigmoid.law and.power law of four ma- terial mod.ls. Shells are reinforced.by the FGM stiffeners and.rest on elastic found.tions. Theoretical formulations are d.riv.d.by the third.ord.r shear d.formation theory （TSd.） with the v.n Karman-type nonlinearity taking into account the initial geometrical im- perfection and.smeared.stiffener technique. The explicit expressions for d.termining the critical buckling load.and.the post-buckling mechanical and.thermal load.d.flection curv.s are obtained.by the Galerkin method. Two iterativ. algorithms are presented. The effects of the stiffeners, the thermal element, the d.stribution law of material, the initial imper- fection, the found.tion, and.the geometrical parameters on buckling and.post-buckling of shells are inv.stigated.

关键词： functionally grad.d.material (FGM) sand.ich d.uble curv.d.shallow shell,thermo-mechanical stability FGM stiffener elastic found.tion

Classification of Rings Associated.with the Genus of Clean Graphs

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Algebra Colloquium 2024年第3期31卷 451-466页

作者： v.Ramanathan C.Selv.raj Aaqib Altaf S.Pirzad. d.partment of Mathematics Periyar UniversitySalem 636011Tamil NaduIndi d.partment of Mathematics University of KashmirHazratbalSrinagarKashmirIndia

Let R be a ring(not necessarily commutativ.)with id.ntity 1 and.let CL(R)be its clean *** this paper,we inv.stigate the genus number of the compact Riemann surface in which CL(R)can be embed.ed.and.explicitly d.termine all commutativ. rings R(up to isomorphism)such that CL(R)has genus at most *** is shown that for any Artinian ring R,CL(R)is a projectiv. graph if and.only if R is isomorphic to ***,we d.termine all isomorphism classes of commutativ. rings whose clean graphs hav. crosscap two.

关键词： clean graph commutativ. ring planar graph genus crosscap

A d.tailed.comparison of the composition of(RE)-Ba-Cu-O-Ag bulk supercond.ctors

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Supercond.ctiv.ty 2024年第1期9卷 87-94页

作者： J.v.J.Congrev. Y.Shi A.R.d.nnis H.d.uiff N.C.Tutt d.A.Card.ell J.H.d.rrell d.partment of Engineering University of CambridgeCambridgeUK

The homogeneity of the microstructure and.composition are critical in d.termining the properties of rare earthbarium‐cuprate,single grain bulk supercond.ctors[(RE)BCO].The magnitud. of the trapped.magnetic field.achiev.able in these technologically important materials,in particular,is influenced.heav.ly by the size and.d.stribution of(RE)_(2)BaCuO_(x)(RE‐211)flux pinning inclusions in the bulk microstructure,whereas the size and.d.stribution of silv.r agglomerates present within the bulk supercond.cting matrix correlate d.rectly with improv.d.mechanical *** careful engineering,these materials hav. significant potential for application in range of d.v.ces related.to energy storage,med.cine,electro‐magnetic machinery and.microelectronic *** of(RE)BCO bulk supercond.ctors typically inv.lv.s heating a powd.r compact abov. its peritectic d.composition temperature followed.by slow cooling to facilitate the growth of a single ***(RE)BCO composition has a d.fferent peritectic temperature and.growth rate,which,therefore,necessitates d.fferent requirements in the heating *** fabrication temperature and.growth rate,for example,may hav. an effect on the RE‐211 and.silv.r d.stribution,which may,in turn,affect the supercond.cting properties of the resulting single *** this work we compare the d.stributions of silv.r and.RE‐211 in the single grain microstructures of YBCOAg,Gd.CO‐Ag,EuBCO‐Ag and.SmBCO‐Ag bulk supercond.ctors using optical microscopy,scanning electron microscopy and.energy d.spersiv. X‐ray *** observ. that the d.stributions are v.ry similar along both the a/b‐axis and.c‐axis of these *** suggests that factors other than the maximum temperature used.to achiev. peritectic d.composition and.the rate of single grain growth are particularly influential in d.termining the properties of the as‐processed.samples in the top seed.d.melt growth *** observ.tion d.monstrates there is freed.m to us

关键词： YBCO‐Ag Gd.CO‐Ag SmBCO‐Ag EuBCO‐Ag Composition Bulk supercond.ctor

New d.ntal Alloys with Special Consumer Properties

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贵金属 2012年第A1期33卷 273-278页

作者： TYKOCHINSKIY d. S. v.SEKIN v. v. OJSC "SIC 'Supermetal'" Moscow Russia

The purpose of the inv.stigation was to create a new gold.alloy of yellow for casting the frames of metal ceramic d.ntures. The yellow color correspond. to the consumer and.aesthetic need. of some patients, because it is a sign of the metal, which is noble and.innocuous. The main alloying elements of the majority of gold.alloys for metal-ceramics are platinum and.pallad.um, which increase the strength characteristics. Copper, tin, and.other precious metals and.base metals are also introd.ced.in these alloys. At the same time, it is necessary to ensure the correspond.nce of the properties of the alloy with those of the ceramics applied.onto the metal frame. For this purpose, the thermal expansion coefficient of the alloy (TEC) should.be in a range of 13.5~14.5 ×10 6 K 1 when heated.from 20 to 600 ℃ . The two-component alloys, alloying of gold.with platinum and.pallad.um results in a d.crease in the TEC, and.the introd.ction of copper, silv.r, and.tin, increases it. Multid.rectional influence of the alloying elements is a factor in achiev.ng compliance of the TEC with the giv.n v.lues of the alloy. In multicomponent systems, howev.r, the mutual influence of ind.v.d.al components on the properties of the alloy is unpred.ctable. This also applies to the color characteristics of the alloys, which v.ry in the d.rection of red.cing the yellowness with increasing concentration of platinum and.pallad.um, while other elements may hav. the opposite effect on the results. Yellowness ind.x (YI), calculated.accord.ng to the results of spectrophotometric stud.es, has been chosen as an objectiv. ind.cator of color. In this stud., the requirement for YI was giv.n not less than 25; the color of such alloys can be called.light yellow. All the alloys inv.stigated.contained.85% (by weight) of gold. Therefore, higher corrosion resistance and.biological inertness of a finished.d.ntal prod.cts were ensured. Among the alloys that met the yellowness/TEC requirements, two alloys hav. been sel

关键词： gold platinum pallad.um alloying elements alloy yellowness thermal expansion coefficient (TEC) metal-ceramics