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Advan.es in.Materials Physics an. Chemistry 2012年第4期2卷 239-248页

作者： Gustavo M. Platt ivan n. bastos Mon.ca C. An.rade Glória D. A. Soares Federal Un.versity of Rio de Jan.iro Rio de Janeiro Brazil State Un.versity of Rio de Jan.iro Nova Friburgo Brazil

The formation.of calcium phosphate phases is extremely importan. in.a biomedical en.in.erin. con.ext. These phosphates are used in.man. application., such as grafts, drug-delivery processes an. evaluation.of the bioactivity of metallic surfaces. Con.iderin. this scen.rio, it is useful to evaluate the thermodyn.mic con.ition. for the precipitation.of phosphates of biomedical in.erest, main.y hydroxyapatite. In.this work, we in.estigate the effects of two importan. factors usin. a thermodyn.mic framework: 1) carbon.dioxide partial pressure;an. 2) buffer type (2-Amin.-2-hydroxy- methyl-propan.-1,3-diol, kn.wn.as TRIS an. 2-[4-(2-hydroxyethyl)piperazin.1-yl] ethan.sulfon.c acid, also called HEPES), on.the drivin. force behin. the precipitation.of calcium phosphates in.simulated body fluids. The in.silico results show that the pH value is govern.d by carbon.dioxide con.en., as expected to occur in.vivo. Moreover, the buffers can.deplete the free calcium available in.solution.an., con.equen.ly, can.cause difficulties in.the calcium phosphate precipitation.

关键词： Hydroxyapatite Thermodyn.mic Modellin. Carbon Dioxide HEPES an. TRIS Buffers In Silico Experimen.s

n.uroprotective therapy for retin.l n.urodegen.rative diseases by stem cell secretome

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n.ural Regen.ration.Research 2021年第1期16卷 117-118页

作者： Ricardo Usategui-Martín.ivan Fern.n.ez-Buen. In.tituto Un.versitario de Oftalmobiología Aplicada(IOBA) Retina GroupUniversidad de ValladolidValladolidSpain Cen.ro en.Red de Medicin. Regen.rativa y Terapia Celular de Castilla y León Red Temática de Investigación Cooperativa en SaludOftaredInstituto de Salud Carlos IIIValladolidSpain

Retin.l n.urodegen.rative diseases like agerelated macular degen.ration.glaucoma,diabetic retin.pathy or retin.tis pigmen.osa are the most frequen. causes of in.urable low vision.an. blin.n.ss *** had been.estimated that the prevalen.e of these diseases varies between.1/750 an. 1/5000 depen.in. on.the region.the level of con.an.uin.ty or ethn.city(n. et al.,2017).The fun.tion.l an. structural complexity of the retin. makes it susceptible to multiple types of pathogen.c damage.

关键词： diseases protective degen.rative

Solar flares with similar soft but differen. hard X-ray emission.： case an. statistical studies

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Research in.Astron.my an. Astrophysics 2016年第1期16卷 39-50页

作者： ivan n.Sharykin.Alexei B.Strumin.ky ivan V.Zimovets Wei-Qun.Gan Space Research In.titute Russian Academy of Sciences Moscow 117997 Russia Purple Moun.ain.Observatory Chinese Academy of Sciences Nanjing 210008 China

From the Reuven.Ramaty High En.rgy Solar Spectroscopic Imager （RHESS1） catalog we select even.s which have approximately the same GOES class （high C - low M or 500-1200 coun.s s-1 within.the RHESSI 6-12 keV en.rgy ban.）, but with differen. maximal en.rgies of detected hard X-rays. The selected even.s are subdivided in.o two groups：（1） flares with X-ray emission. observed by RHESSI up to on.y 50 keV an. （2） flares with hard X-ray emission.observed also above 50 keV. The main.task is to un.erstan. observation.l peculiarities of these two flare groups. We use RHESSIX-ray data to obtain.spectral an. spa- tial in.ormation.in.order to fin. differen.es between.selected groups. Spectra an. images are an.lyzed in.detail for six even.s （case study）. For a larger n.mber of samples （85 an. 28 flares in.the low-en.rgy an. high-en.rgy groups respectively） we on.y make some gen.ralization.. In.spectral an.lysis we use the thick- target model for hard X-ray emission.an. on. temperature assumption.for thermal soft X-ray emission. RHESSI X-ray images are used for determin.tion.of flare region.sizes. Although thermal an. spatial prop- erties of these two groups of flares are n.t easily distin.uishable, power law in.ices of hard X-rays show sign.fican. differen.es. Even.s from the high-en.rgy group gen.rally have a harder spectrum. Therefore, the efficien.y of chromospheric evaporation.is n.t sen.itive to the hardn.ss of n.n.hermal electron.spectra but rather depen.s on.the total en.rgy flux of n.n.hermal electron..

关键词： Sun. flares -- Sun. X-rays -- gamma rays

On.-Gen.rated n.lpoten. Bicommutative Algebras

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Algebra Colloquium 2022年第3期29卷 453-474页

作者： ivan Kaygorodov Pilar Páez-Guillán.Vasily Voron.n Cen.ro de Matemática e Aplicacōes Universidade da Beira InteriorCovilhãPortugal Institute of Mathematics and Mathematical ModelingAlmatyKazakhstan Un.versity of San.iago de Compostela Santiago de CompostelaSpain University of ViennaViennaAustria n.vosibirsk State Un.versity NovosibirskRussia

We give a classification.of 5-an. 6-dimen.ion.l complex on.-gen.rated n.lpoten. bicommutative algebras.

关键词： bicommutative algebras n.lpoten. algebras algebraic classification cen.ral exten.ion

Lon.-period eclipsin. bin.ries:towards the true mass-lumin.sity *** test sample,observation. an. data an.lysis

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Research in.Astron.my an. Astrophysics 2020年第8期20卷 169-176页

作者： Alexei Yu.Kn.azev Oleg Yu.Maikov ivan Yu.Katkov Leon.d n.Berdn.kov South African.Astron.mical Observatory P.O.Box 9ObservatoryCape Town7935South Africa Southern.African.Large Telescope P.O.Box 9ObservatoryCape Town7935South Africa Stern.erg Astron.mical In.titute Lomonosov Moscow State UniversityMoscow119992Russia In.titute of Astron.my of RAS Moscow 119017Russia n.w York Un.versity Abu Dhabi PO Box 129188Abu DhabiUAE Cen.er for Astro Particleand Planetary PhysicsNYU Abu DhabiPO Box 129188Abu DhabiUAE

The mass-lumin.sity relation.is a fun.amen.al law of *** have suggested that the curren.ly used mass-lumin.sity relation.is n.t correct for the M/M⊙>2.7 ran.e of mass sin.e it was created utilizin. double-lin.d eclipsin. bin.ries,where the compon.n.s are syn.hron.zed an. con.equen.ly chan.e each other's evolution.ry *** exclude this effect,we have started a project to study lon.period massive eclipsin. bin.ries in.order to con.truct radial velocity curves an. determin. masses for the *** outlin. our project an. presen. the selected test sample together with the first HRS/SALT spectral observation. an. the software package,FITTIn. BIn.RY STARS(FBS),that we developed for the an.lysis of our spectral *** the first result,we presen. the radial velocity curves an. best-fit orbital elemen.s for the two compon.n.s of the FP Car bin.ry system from our test sample.

关键词： stars:lumin.sity fun.tion mass fun.tion stars:bin.ries:spectroscopic

Discrimin.tion.of ven.ricular tachycardia an. localization.of its exit site usin. surface electrocardiography

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Journ.l of Geriatric Cardiology 2019年第4期16卷 362-377页

作者： Heber ivan Con.ori Lean.ro Dmitry S Lebedev Evgen. n.Mikhaylov Lan. G.F. departmen. of In.ern.l Medicin. Pavlov First Saint Petersburg State Medical UniversitySaint-PetersburgRussia Almazov n.tion.l Medical Research Cen.re Saint-PetersburgRussia Departmen. of Medical an. Biotechn.logy Systems First Electrotechnical UniversitySaint-PetersburgRussia

Differen.ial diagn.sis of supraven.ricular tachycardia (SVT) an. ven.ricular tachycardia (VT) is of paramoun. importan.e for appropriate patien. man.gemen.. Several diagn.stic algorithms for discrimin.tion.of VT an. SVT based on.surface electrocardiogram (ECG) an.lysis have been.proposed. Followin. established diagn.sis of VT,a specific origin.tion.tachycardia site can.be supposed accordin. to QRS complex characteristics. This review aims to cover comprehen.ive an. comparative description.of the main.VT diagn.stic algorithms an. to presen. ECG characteristics which permit to suggest the most common.VT origin.tion.sites.

关键词： Arrhythmias Electrocardiogram Supraven.ricular Tachycardia Ven.ricular

Dyn.mic failure of dry an. fully saturated limeston. samples based on.in.ubation.time con.ept

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Journ.l of Rock Mechan.cs an. Geotechn.cal En.in.erin. 2017年第1期9卷 125-134页

作者： Yuri V. Petrov ivan V. Smirn.v Grigory A. Volkov An.rei K. Abramian.An.toliy M. Bragov Stan.slav n. Verichev Sain. Petersburg Un.versity Universitetskaya nab. 7-9 Saint Petersburg 199034 Russia In.titute of Problems of Mechan.cal En.in.erin. Russian Academy of Sciences Bolshoj pr. 61 V.O. Saint Petersburg 199178 Russia Lobachevsky State Un.versity of n.zhn. n.vgorod Prospekt Gagarina 23 Nizhny Novgorod 603950 Russia Allseas En.in.erin. B.V. Poortweg 12 Delft 2612 PA The Netherlands

This paper outlin.s the results of experimen.al study of the dyn.mic rock failure based on.the comparison.of dry an. saturated limeston. samples obtain.d durin. the dyn.mic compression.an. split tests. The tests were performed usin. the Kolsky method an. its modification. for dyn.mic splittin.. The mechan.cal data(e.g. stren.th, time an. en.rgy characteristics) of this material at high strain.rates are obtain.d. It is shown.that these characteristics are sen.itive to the strain.rate. A un.fied in.erpretation.of these rate effects, based on.the structuraletemporal approach, is hereby presen.ed. It is demon.trated that the temporal depen.en.e of the dyn.mic compressive an. split ten.ile stren.ths of dry an. saturated limeston. samples can.be predicted by the in.ubation.time criterion. Previously discovered possibilities to optimize(min.mize) the en.rgy in.ut for the failure process is discussed in.con.ection.with in.ustrial rock failure processes. It is shown.that the optimal en.rgy in.ut value associated with critical load, which is required to in.tialize failure in.the rock media, stron.ly depen.s on.the in.ubation.time an. the impact duration. The optimal load shapes, which min.mize the momen.um for a sin.le failure impact, are demon.trated. Through this in.estigation. a possible approach to reduce the specific en.rgy required for rock cuttin. by mean. of high-frequen.y vibration. is also discussed.

关键词： Dyn.mic stren.th In.ubation.time criterion Split Hopkin.on.pressure bar(SHPB) test Ten.ile stren.th Compressive stren.th Water-saturated limeston. Vibration.assisted rock cuttin.

Sin.le-atom spin.ron.cs

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中国有色金属学会会刊：英文版 2006年第B01期16卷 146-153页

作者： Susan.Z.HUA Matthew R.SULL ivan Jason.n.ARMSTROn. Materials Program Mechanical and Aerospace Engineering DepartmentState University of New York at BuffaloBuffaloNY 14260USA

Recen. work on.magn.tic quan.um poin. con.acts (QPCs) was discussed. Complete magn.toresistan.e loops across Co QPCs as small as a sin.le atom was measured. The remarkable feature of these QPCs is the rapid oscillatory decay in.magn.toresistan.e with the in.rease of con.act size. In.addition. stepwise or quan.um magn.toresistan.e loops are observed, resultin. from varyin. tran.mission.probability of the available discrete con.uctan.e chan.els because the sample is cycled between.the ferromagn.tic (F) an. an.iferromagn.tic (AF) align.d states. Quan.ized con.uctan.e combin.d with spin.depen.en. tran.mission.of electron.waves gives rise to a multi-chan.el system with a quan.um domain.wall actin. as a valve, i.e., a quan.um spin.valve. Behavior of a few-atom QPC is built on.the behavior of a sin.le-atom QPC an. hen.e the summarization.of results as ‘sin.le-atom spin.ron.cs’. An.evolution.ry trace of spin.depen.en. electron.tran.mission.from a sin.le atom to bulk is provided, the requisite hallmarks of artefact-free magn.toresistan.e is established across a QPC – stepwise or quan.um magn.toresistan.e loops an. size depen.en. oscillatory magn.toresistan.e.

关键词：单原子自旋电子学量子点接触电子波导振荡磁阻

LOW-RAn. TEn.OR STRUCTURE OF SOLUTIOn. TO ELLIPTIC PROBLEMS WITH JUMPIn. COEFFICIEn.S

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Journ.l of Computation.l Mathematics 2012年第1期30卷 14-23页

作者： Sergey Dolgov Boris n.Khoromskij ivan Oseledets Eugen. E.Tyrtyshn.kov Moscow In.titute of Physics an. Techn.logy Russia Max-Plan.k-In.titute for Mathematics in.Scien.es Inselstr.22-26D-04103 LeipzigGermany In.titute of n.merical Mathematics Russian Academy of SciencesGubkina 8119991 MoscowRussia Lomon.sov Moscow State Un.versity Russia Un.versity of Siedlce Poland(visiting professor)

We study the separability properties of solution. to elliptic equation. with piecewise con.tan. coefficien.s in.Rd, d ≥ 2. The separation.ran. of the solution.to diffusion.equation.with variable coefficien.s is prese... 详细信息

关键词： Structured matrices Elliptic operators Poisson.equation Matrix approxima-tion. Lowran. matrices Ten.ors Can.n.cal decomposition.

In.ravitreal stem cell paracrin. properties as a poten.ial n.uroprotective therapy for retin.l photoreceptor n.urodegen.rative diseases

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n.ural Regen.ration.Research 2020年第9期15卷 1631-1638页

作者： Kevin.Puertas-n.yra Ricardo Usategui-Martín.Rosa MCoco ivan Fern.n.ez-Buen. In.tituto Un.versitario de Oftalmobiologia Aplicada Universidad de ValladolidValladolidSpain Cen.ro en.Red de Medicin. Regen.rativa y Terapia Celular de Castilla y Leon ValladolidSpain Red Tematica de In.estigacion.Cooperativa en.Salud OftaredInstituto de Salud CarlosⅢValladolidSpain

Retin.l degen.ration. are the leadin. causes of irreversible visual loss worldwide. Man. pathologies in.luded un.er this umbrella in.olve progressive degen.ration.an. ultimate loss of the photoreceptor cells, with age-related macular degen.ration.an. in.erited an. ischemic retin.l diseases the most relevan.. These diseases greatly impact patien.s' daily lives, with accompan.in. marked social an. econ.mic con.equen.es. However, the curren.ly available treatmen.s on.y delay the on.et or slow progression.of visual impairmen., an. there are n. cures for these photoreceptor diseases. Therefore, n.w therapeutic strategies are bein. in.estigated, such as gen. therapy, optogen.tics, cell replacemen., or cell-based n.uroprotection. Specifically, stem cells can.secrete n.urotrophic, immun.modulatory, an. an.i-an.iogen.c factors that poten.ially protect an. preserve retin.l cells from n.urodegen.ration. Further, n.uroprotection.can.be used in.differen. types of retin.l degen.rative diseases an. at differen. disease stages, un.ike other poten.ial therapies. This review summarizes stem cell-based paracrin. n.uroprotective strategies for photoreceptor degen.ration. which are un.er study in.clin.cal trials, an. the latest preclin.cal studies. Effective retin.l n.uroprotection.could be the n.xt fron.ier in.photoreceptor diseases, an. the developmen. of n.vel n.uroprotective strategies will address the un.et therapeutic n.eds.

关键词： clin.cal trials growth factors in.raocular in.ection in.ravitreal in.ection n.uroprotection paracrin. properties photoreceptors preclin.cal models retin.l diseases stem cells