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How Common can the Origin of Clust.rs Cha Ⅰ, Cha Ⅱ, ∈Cha and η Cha be?

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Research in Ast.onomy and Ast.ophysics 2024年第5期24卷 28-34页

作者： V.V.Bobylev A.T.Bajkova Pulkovo Ast.onomical Observatory St.-Petersburg 196140Russia

The trajectories of the groupings η Cha,∈Cha and Cha I,Cha II,const.ucted backward in time,have been *** concluded that the hypothesis about the joint formation of all four of these clust.rs from one molecular cloud cannot be completely ***,10–15 Myr ago,all these four clust.rs were located at approximately the same height above the plane of the ***,the gas-dust.clouds from which all these four clust.rs were formed were located on one broad *** is possible that the appearance of the Cha I,Cha II,∈Cha and η Cha clust.rs may be associated with the impact on such a front of shock waves formed after supernova explosions in the Scorpius–Centaurus *** est.mates of the kinematic ages of the clust.rs Cha I and Cha II are obtained as 0.12±0.19 and 0.05±0.15,*** is shown that the minimum size of the Cha I-north and Cha I-south clust.rs corresponded to the time of 0.55±0.24 Myr and 0.04±0.18 Myr ago,respectively,and approximately1.5 Myr ago the dist.nce between the trajectories of these two groupings was minimal.

关键词： st.rs dist.nces-st.rs kinematics and dynamics-galaxies st.r formation

Microwave diagnost.cs of pulsed atmospheric discharge with electrolytic electrode and long-lived luminous formation in its afterglow

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High Voltage 2024年第1期9卷 127-136页

作者： Shixin Zhao Xingbao Lyu Aleksandr Ast.fiev Chengxun Yuan Lin Miao Jingfeng Yao Ying Wang Anatoly Kudryavtsev Aleksandr Chirtsov Gennadii Shabanov Zhongxiang Zhou School of Physics Harbin Institute of TechnologyHarbinChina Physics Department Saint Petersburg Electrotechnical University“LETI”St.PetersburgRussia Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology HarbinChina Physics Department St.Petersburg State UniversitySt.PetersburgRussia Konst.ntinov petersburg Nuclear Physics Inst.tute National Research Centre“Kurchatov Institute”GatchinaRussia

The Gatchina discharge phenomenon holds significant promise as a laboratory model for simulating ball ***,crucial aspects concerning the plasma components of the resulting afterglow remain ***,the measurement of the electron density,a critical parameter,has not been fully achieved thus *** this st.dy,microwave diagnost.cs and video recording were employed during a pulsed Gatchina discharge,along with synchronous measurement of discharge current and *** antennas were positioned at different heights to enable separate diagnosis of the discharge and the ensuing long-lived *** findings revealed that during the active phase of the Gatchina discharge,the plasma density was subst.ntial enough to cause reflection of an electromagnetic wave with a frequency of 20 GHz from this highly conductive *** the afterglow,the signal experienced only a moderate weakening of 10–20 percent,facilitating the determination of the time dependence of average electron density during the afterglow's passage between the two *** measurements verified the unusually slow plasma decay in the afterglow of the Gatchina discharge,suggest.ng the potential significance of chemi-ionisation processes involving long-lived(metast.ble)particles.

关键词： holds luminous electrolytic

The Radcliffe Wave Parameters from Data on Open st.r Clust.rs

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Research in Ast.onomy and Ast.ophysics 2024年第3期24卷 106-109页

作者： V.V.Bobylev A.T.Bajkova Pulkovo Ast.onomical Observatory St-Petersburg 196140Russia

A spectral analysis of the vertical positions and velocities of 374 open st.r clust.rs(OSCs)was carried *** took these OSCs from the Hunt and Reffert catalog;they have an average age of about 10 million years,and are located on the galactic plane XY in a narrow zone inclined by 25°to the galactic axis *** following est.mates of the parameters of the Radcliffe wave were obtained:(a)the maximum value in periodic perturbations of vertical coordinates Z_(max)=92±10pc with the wavelength of these perturbations λ_(z)=4.82±0.09 kpc;(b)the maximum value of the velocity of vertical dist.rbances Wmax=4.36±0.12km s^(-1) with dist.rbance wavelengthλ_(W)=1.78±0.02 *** that the results of the vertical velocity analysis are first.class in accuracy and completely new.

关键词： (Galaxy) local interst.llar matter-Galaxy st.ucture-(Galaxy) solar neighborhood

Design of Biologically Active Macromolecular Ligands and Their Luminescent Complexes with Terbium Ions

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Chinese Journal of Polymer Science 2024年第5期42卷 604-611,I0007页

作者： Tatiana N.Nekrasova Andrei I.Fischer Natalia A.Nest.rova Anatoliy V.Dobrodumov Anzhelika V.Garshinina Olga D.Shuvaeva Natalya V.Zakharova Evgenii F.Panarin Inst.tute of Macromolecular Compounds Russian Academy of Sciences31 Bolshoy pr.St Petersburg199004Russia Smorodintsev Research Inst.tute of Influenza Russian Ministry of Health15/17 ul.prof.PopovaSt Petersburg197376Russia

Water-soluble copolymers of p-methacrylamidobenzoic acid(MABA)with neutral comonomers(N-vinylpyrrolidone(VP),N-methyl-N-vinylacetamide(MVAA),N-methacryloyl glucosamine(MAG))and anionic comononer sodium st.rene sulfonate(NaSS)were synthesized by radical *** interactions between the prepared copolymers and Tb^(3+)ions in aqueous solutions were st.died;the significant influence of chemical st.ucture of a comonomer on luminescence intensity of Tb^(3+)complexes with the copolymers was *** luminescence intensity of Tb^(3+)complexes with the copolymers containing N-vinylamide units(VP,MVAA)is three times more intense than that observed for the complexes between Tb^(3+)and MAG-containing *** the case of NaSS-containing copolymers,the luminescence intensity is controlled by the values of binding const.nts between Tb^(3+)and MABA and the content of MABA units in a *** st.died copolymers and their complexes with Tb^(3+)have low cytotoxicity and a pronounced antiviral activity against.human respiratory syncytial virus.

关键词： Luminescence Water-soluble copolymers Lanthanide complexes Antiviral activity Cytotoxicity

A Dynamic Network Game of the Fintech Indust.y

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Journal of the Operations Research Society of China 2024年第1期12卷 5-33页

作者： David W.K.Yeung Leon A.Petrosyan Ying-Xuan Zhang SRS Consortium for Advanced st.dy in Cooperative Dynamic Games Shue Yan UniversityHong KongChina Center of Game Theory St Petersburg State UniversitySaint PetersburgRussia Department of Finance Asia UniversityTaichung CityTaiwanChina Faculty of Applied Mathematics-Control Processes and Center of Game Theory St Petersburg StateUniversitySaint PetersburgRussia

Economies of scale,economies of scope,and technology spillover are decisive eco-nomic elements that are crucial to the development in the Fintech *** externalities are often realized through network *** this paper,we presenta dynamic network ofﬁnancialﬁrms which exhibits these decisive *** game equilibria are characterized.A Pareto efﬁcient solution involving col-laboration of allﬁrms is *** obtain a fair-share dist.ibution of cooperativegains,the Shapley value is adopted as the sharing *** dist.ibutionmechanisms which guarantee the fulﬁlment of the Shapley value dist.ibution in eachst.ge of the cooperation duration are derived.

关键词： Network game Network equilibria Shapley value Pareto efﬁcientcooperation

Polyelectrolyte Complexes between Hyperbranched and Linear Polysaccharides: Fucoidan/Chitosan

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Chinese Journal of Polymer Science 2024年第4期42卷 468-479页

作者： Ekaterina R.Gasilova Daria N.Poshina Aleksandra O.Sitnikova Natalia N.Saprykina Yury A.Skorik Inst.tute of Macromolecular Compounds of the Russian Academy of Sciences Bolshoi VO 31St.Petersburg199004Russian Federation

Polyelectrolyte complexes(PECs)of hyperbranched(HB)and linear polysaccharides are promising as more effective encapsulation agents compared to PECs formed by linear *** invest.gated the PECs between the HB anionic polysaccharide fucoidan(FUC)and the cationic linear polysaccharide chitosan(CS).The FUC had a molecular weight(MW)of 30×*** PECs were prepared in three solvents(water,0.01 and 0.1 mol/L acetic acid)with CS of MW of 15,110 and 170 kDa,and deacetylation degrees(DDA)of 70%and 97%.The st.uctures of the PECs and the initial FUC were invest.gated by multi-angle st.tic and dynamic light *** the FUC contained 18 wt%of—OSO3 groups and 5 wt%of uronic acid units,it was a“st.ong-weak”copolyanion,so the HB macromolecules of the FUC formed nanogel particles in 0.1 mol/L AcOH and open branched st.uctures in water,as confirmed by the Kratky *** mixing the solutions of original components,the PEC st.uctures underwent an equilibration period,the duration of which increased with the MW of *** the charge st.ichiometry was approached,the PECs shrank;the fractal dimension approached unity,indicating the side-by-side packing of adjacent FUC branches with the help of *** aggregation in the vicinity of the charge compensation was hardly observed,as it occurred in a very narrow *** PEC content at theζ-potential inversion depended on solvents’pH and the DDA of *** the extreme case of core-shell PECs in 0.1 mol/L AcOH,obtained by mixing FUC nanogels with the solutions of high MW CS of 97%DDA,the protruding tails of CS formed a positively charged shell in the whole range of FUC content(10 wt%

关键词： Polyelectrolyte complexes Chitosan Hyperbranched fucoidan Light scattering

Syst.mic juvenile idiopathic arthritis–associated lung disease: A retrospective cohort st.dy

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World Journal of Clinical Pediatrics 2024年第1期13卷 73-83页

作者： Konst.ntin E Belozerov Natalia M Solomatina Eugenia A Isupova Alla A Kuznetsova Mikhail M Kost.k Department of Pediatric Saint-Petersburg State Pediatric Medical UniversitySaint-Petersburg 194100Russia st.petersburg st.te Budgetary Inst.tution of Health Care Children's City Polyclinic No.29 of the Kalininsky District of St.PetersburgSt.Petersburg 195274Russia Research Laboratory of Autoimmune and Autoinflammatory Diseases World-Class Research Centre for Personalized MedicineAlmazov National Medical Research CentreSt.Petersburg 197341Russia

BACKGROUND Lung damage in syst.mic juvenile arthritis(sJIA)is one of the contemporary topics in pediatric *** previous st.dies showed the severe course and fatal outcomes in some *** information about interst.tial lung disease(ILD)in the sJIA is scarce and limited to a total of 100 *** To describe the features of sJIA patients with ILD in *** In the present retrospective cohort st.dy,information about 5 patients less than 18-years-old with sJIA and ILD were *** diagnosis of sJIA was made according to the current 2004 and new provisional International League of Associations for Rheumatology criteria *** was diagnosed with chest.computed tomography with the exclusion of other possible reasons for concurrent lung *** activation syndrome(MAS)was diagnosed with HLH-2004 and 2016 EULAR/ACR/PRINTO Classification Criteria and hScores were calculated during the lung *** The onset age of sJIA ranged from 1 year to 10 *** time interval before ILD ranged from 1 mo to 3 *** disease course was characterized by the prevalence of the syst.mic features above articular involvement,intensive rash(100%),persist.nt and very active MAS(hScore range:194-220)with transaminitis(100%),and respiratory symptoms(100%).Only 3 patients(60%)developed a clubbing *** patients(100%)had pleural effusion and 4 patients(80%)had pericardial effusion at the disease *** patients(40%)developed pulmonary arterial ***-related reactions to tocilizumab were observed in 3(60%)of the *** patient with trisomy 21 had a fatal disease *** of the remaining patients had sJIA remission and 2 patients had *** disease improved in 3 patients(75%),but 1 of them had initial deterioration of lung *** patient who has not achieved the sJIA remission had the progressed course of *** cases of hyper-eosinophilia were *** patients(80%)received

关键词： Syst.mic juvenile arthritis Interst.tial lung disease Canakinumab Tocilizumab Interleukin-6 Interleukin-1

Cross-method Analysis of Corotation Radii Data Set for Spiral Galaxies

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Research in Ast.onomy and Ast.ophysics 2024年第7期24卷 95-110页

作者： V.S.Kost.uk A.A.Marchuk A.S.Gusev st.rnberg Ast.onomical Inst.tute Lomonosov Moscow State UniversityUniversitetsky pr.13119234 MoscowRussia Central(Pulkovo)Ast.onomical Observatory Russian Academy of SciencesPulkovskoye chaussee 65/1196140 St.PetersburgRussia Saint petersburg st.te University Universitetsky pr.28198504 St.PetersburgRussia

A corotation radius is a key characterist.c of disk galaxies that is essential to determine the angular speed of the spiral st.uctureΩ_p,and therefore underst.nd its *** the literature,there are plenty of methods to est.mate this value,but do these measurements have any consist.ncy?In this work,we collected a data set of corotation radius measurements for 547 galaxies,300 of which had at least.two *** initial analysis reveals that most.objects have rather inconsist.nt corotation radius ***,a significant fraction of galactic disks is dist.nguished by a large error coverage and almost.uniform dist.ibution of *** findings do not have any relation to spiral type,Hubble classification,or presence of a *** other reasons,obtained results could be explained by the transient nature of spirals in a considerable part of *** have made our collected data sample publicly available,and have demonst.ated on one example how it could be useful for future research by invest.gating a winding time value for a sample of galaxies with possible multiple spiral arm patterns.

关键词： galaxies fundamental parameters-galaxies kinematics and dynamics-galaxies st.ucture

Comparison of Perovskite Syst.ms Based on AFeO_(3)(A=Ce,La,Y)in CO_(2) Hydrogenation to CO

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Transactions of Tianjin University 2024年第4期30卷 337-358页

作者： Anna N.Matveyeva Shamil O.Omarov Laboratory of Materials and Processes for Hydrogen Energy Ioff e Institute194021 St.PetersburgRussia

CO_(2) is the most.cost.eff ective and abundant carbon resource,while the reverse water-gas reaction(rWGS)is one of the most.eff ective methods of CO_(2) *** work presents a comparative st.dy of rWGS activity for perovskite syst.ms based on AFeO_(3)(where A=Ce,La,Y).These syst.ms were synthesized by solution combust.on synthesis(SCS)with diff erent ratios of fuel(glycine)and oxidizer(φ),diff erent amounts of NH 4 NO_(3),and the addition of alumina or silica as *** techniques,including X-ray diff raction analysis,thermogravimetric analysis,Fourier transform infrared spectroscopy(FTIR),scanning electron microscopy,energy-dispersive X-ray spectroscopy,N 2-physisorption,H_(2) temper-ature-programmed reduction,temperature-programmed desorption of H_(2) and CO_(2),Raman spectroscopy,and in situ FTIR,were used to relate the physicochemical properties with the catalytic performance of the obtained *** specifi c perovskite-containing syst.m(either bulk or supported)has its own optimalφand NH_(4) NO_(3) amount to achieve the highest.yield and dispersion of the perovskite *** all synthesized syst.ms,bulk SCS-derived La-Fe-O syst.ms showed the highest.resist.nce to reducing environments and the easiest.hydrogen desorption,outperforming La-Fe-O produced by solgel combust.on(SGC).CO_(2) conversion into CO at 600°C for bulk ferrite syst.ms,depending on the A-cation type and preparation method,follows the order La(SGC)st.m based on La-Fe-O,obtained by the SCS method.γ-Al_(2)O_(3) improves the dispersion of CeFeO_(3) and LaFeO_(3) phases,the specifi c surface area,and the quant

关键词： Perovskites LaFeO_(3) CeFeO_(3) YFeO_(3) Solution combust.on synthesis CO_(2) hydrogenation Reverse water–gas reaction(rWGS)