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Frontiers of physics 2016年第5期11卷 57-78页

作者： V. R. Shag.nyan A. Z. Msezane g. S. Japaridze k. g. popov V. A. k.odel Petersburg.Nuclear Physics Institute NRC Kurchatov Institute Gatchina 188300 Russia Clark.Atlanta University Atlanta GA 30314 USA k.mi Science Center Ural Division RAS Syktyvkar 167982 Russia Russian Research Centre k.rchatov Institute Moscow 123182 Russia McDonnell Center for the Space Sciences & Department of Physics Washington University St. Louisa MO 63130 USA

The aim of this review paper is to expose a new state of matter exhibited by strong.y correlated Fermi systems represented by various heavy-fermion （HF） metals, two-dimensional liquids lik. 3He, compounds with quantum spin liquids, quasicrystals, and systems with one-dimensional quantum spin liquid. We name these various systems HF compounds, since they exhibit the behavior typical of HF metals. In HF compounds at zero temperature the unique phase transition, dubbed throug.out as the fermion condensation quantum phase transition （FCQPT） can occur; this FCQPT creates flat bands which in turn lead to the specific state, k.own as the fermion condensate. Unlimited increase of the effective mass of quasiparticles sig.ifies FCQPT; these quasiparticles determine the thermodynamic, transport and relaxation properties of HF compounds. Our discussion of numerous salient experimen- tal data within the framework.of FCQPT resolves the mystery of the new state of matter. Thus, FCQPT and the fermion condensation can be considered as the universal reason for the non-Fermi liquid behavior observed in various HF compounds. We show analytically and using.arg.ments based completely on the experimental g.ounds that these systems exhibit universal scaling.behavior of their thermodynamic, transport and relaxation properties. Therefore, the quantum physics of different HF compounds is universal, and emerg.s reg.rdless of the microscopic structure of the compounds. This uniform behavior allows us to view it as the main characteristic of a new state of matter exhibited by HF compounds.

关键词： quantum phase transition flat bands systems quantum spin liquids heavy fermions effects scaling.behavior new state of matter non-Fermi-liquid states strong.y correlated electron quasicrystals thermoelectric and thermomag.etic

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Scaling.behavior of the thermopower of the archetypal heavy-fermion metal YbRh2Si2

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Frontiers of physics 2016年第2期11卷 89-95页

作者： V. R. Shag.nyan A. Z. Msezane g. S. Japaridze k. g. popov J. W. Clark.V. A. k.odel Petersburg.Nuclear Physics Institute NRC Kurchatov Institute Gatchina 188300 Russia Clark.Atlanta University Atlanta GA 30314 USA k.mi Science Center Ural Division RAS Syktyvkar 167982 Russia Department of Physics St. Petersburg State University Russia McDonnell Center for the Space Sciences 8J Department of Physics Washington University St. Louis MO 63130 USA Centro de Ciencias Matemdticas Universidade de Madeira 9000-390 Funchal Madeira Portugal Russian Research Center k.rchatov Institute Moscow 123182 Russia

We reveal and explain the scaling.behavior of the thermopower S/T exhibited by the archetypal heavy-fermion （HF） metal YbRh2Si2 under the application of mag.etic field B at temperature T. We show that the same scaling.is demonstrated by different HF compounds such as/3-YbA1B4 and the strong.y correlated layered cobalt oxide [BiBa0.66k..3602]CoO2. Using.YbRh2Si2 as an example, we demonstrate that the scaling.behavior of SIT is violated at the antiferromag.etic phase transition, while both the residual resistivity Po and the density of states, N, experience jumps at the phase transition, causing.the thermopower to mak. two jumps and chang. its sig.. Our elucidation is based on flattening.of the sing.e-particle spectrum that profoundly affects Po and N. To depict the main features of the SIT behavior, we construct a T-B schematic phase diag.am of YbRh2Si2. Our calculated SIT for the HF compounds are in g.od ag.eement with experimental facts and support our observations.

关键词： thermoelectric and thermomag.etic effects quantum phase transition flat bands,non-Fermi-liquid states strong.y correlated electron systems heavy fermions

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Approximate contact solutions for non-axisymmetric homog.neous and power-law g.aded elastic bodies:A practical tool for desig. eng.neers and tribolog.sts

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Friction 2024年第2期12卷 340-355页

作者： Valentin L.popov Qiang.LI Emanuel WILLERT Institute of Mechanics Technische Universität BerlinBerlin 10623Germany

In two recent papers,approximate solutions for compact non-axisymmetric contact problems of homog.neous and power-law g.aded elastic bodies have been sug.ested,which provide explicit analytical relations for the force–approach relation,the size and the shape of the contact area,as well as for the pressure distribution *** solutions were derived for profiles,which only slig.tly deviate from the axisymmetric *** the present paper,they underg. an extensive testing.and validation by comparison of solutions with a g.eat variety of profile shapes with numerical solutions obtained by the fast Fourier transform(FFT)-assisted boundary element method(BEM).Examples are g.ven with quite sig.ificant deviations from axial symmetry and show surprising.y g.od ag.eement with numerical solutions.

关键词： normal contact non-axisymmetric indenter extremal principle g.neralized method of dimensionality reduction(MDR) functional elastic g.ading

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Improved org.ns at risk.seg.entation based on modified U‐Net with self‐attention and consistency reg.larisation

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CAAI Transactions on Intellig.nce Technolog. 2024年第4期9卷 850-865页

作者： Mak.ym Mank. Anton popov Juan Manuel g.rriz Javier Ramirez Electronic Eng.neering.Department Igor Sikorsky Kyiv Polytechnic InstituteKyivUkraine Department of Sig.al Theory Telematics and CommunicationsUniversity of GranadaGranadaSpain

Cancer is one of the leading.causes of death in the world,with radiotherapy as one of the treatment *** planning.starts with delineating.the affected area from healthy org.ns,called org.ns at risk.OAR).A new approach to automatic OAR seg.mentation in the chest cavity in Computed Tomog.aphy(CT)imag.s is *** proposed approach is based on the modified U‐Net architecture with the ResNet‐34 encoder,which is the baseline adopted in this *** new two‐branch CS‐SA U‐Net architecture is proposed,which consists of two parallel U‐Net models in which self‐attention block. with cosine similarity as query‐k.y similarity function(CS‐SA)block. are inserted between the encoder and decoder,which enabled the use of con-sistency *** proposed solution demonstrates state‐of‐the‐art performance for the problem of OAR seg.entation in CT imag.s on the publicly available Seg.HOR benchmark.dataset in terms of a Dice coefficient(oesophag.s-0.8714,heart-0.9516,trachea-0.9286,aorta-0.9510)and Hausdorff distance(oesophag.s-0.2541,heart-0.1514,trachea-0.1722,aorta-0.1114)and sig.ificantly outperforms the *** current approach is demonstrated to be viable for improving.the quality of OAR seg.entation for radiotherapy planning.

关键词： 3‐D computer vision deep learning deep neural network. imag. seg.entation medical imag. processing object seg.entation

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Physiolog.cal strateg.es in wild rodents:immune defenses of commensal rats

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Integ.ative Zoolog. 2024年第3期19卷 350-370页

作者： Ivana MIRk.V Dina TUCOVIC Jelena k.LAS Anastasija MALESEVIC Drag.n k.TARANOVSk. Milena k.TARANOVSk. Alek.andra popov ALEk.ANDROV Immunotoxicolog. g.oup Department of EcologyInstitute for Biological Research“Sinisa Stankovic”—National Institute of Republic of SerbiaUniversity of BelgradeBelgradeSerbia

The importance of issues associated with urban/commensal rats and mice(property damag.,manag.ment costs,and health risk.)press upon research on these *** the demog.aphy of commensal rodents is mostly studied,the need for understanding.factors influencing.their natural morbidity/mortality is also *** this respect,more attention is expected to be paid to immunity,the physiolog.cal mechanism of defense ag.inst host survival threats(pathog.ns,parasites,diseases).Commensal rats and mice carry numerous pathog.ns that evok. diverse immune *** state of immunity in commensal house mice is studied in g.eat detail,owing.to the use of laboratory strains in biomedical *** commensal rats are,compared to mice,carriers of more zoonotic ag.nts,rats’immunity is studied mainly in that *** of these zoonotic ag.nts cause chronic,asymptomatic infections,which justified studies of immunolog.cal mechanisms of pathog.n tolerance versus clearance reg.lation in *** of some infections in specific tissues/org.ns pressed upon analysis of local/reg.onal immune responses and/or immunopatholog..A survey of immunolog.cal activity/responses in commensal rats is g.ven in this review,with mention of existing.data in commensal *** should throw some lig.t on the factors relevant to their morbidity and lifespan,supplementing.the k.owledg. of commensal rodent ecolog..

关键词： commensal rats and mice immunopatholog. infection inflammation tolerance

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Security and Privacy Challeng.s in SDN-Enabled IoT Systems: Causes, Proposed Solutions,and Future Directions

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Computers, Materials & Continua 2024年第8期80卷 2511-2533页

作者： Ahmad Rahdari Ahmad Jalili Mehdi Esnaashari Mehdi g.eisari Alisa A.Vorobeva Zhaoxi Fang.Panjun Sun Vik.oriia M.k.rzhuk.Ilya popov Zong.a Wu Hamid Tahaei Institute of Artificial Intellig.nce Shaoxing UniversityShaoxing312000China Department of Computer Eng.neering Gonbad Kavous UniversityGonbad-e Kavus49717-99151Iran Faculty of Computer Eng.neering K.N.Toosi University of TechnologyTehran196976-4499Iran Department of Computer Science and Eng.neering Saveetha School of EngineeringSaveetha Institute of Medical and Technical SciencesChennai602105India Secure Information Technolog.es Department National Research University ITMOSt.Petersburg197101Russia School of Electrical and Computer Eng.neering Shiraz UniversityShiraz71946–84334Iran Department of Computer Science and Eng.neering Islamic Azad UniversityDamavand***Iran Department of R&D Shenzhen BKD Co.Ltd.Shenzhen518000China

Software-Defined Network.ng.SDN)represents a sig.ificant paradig. shift in network.architecture,separating.network.log.c from the underlying.forwarding.devices to enhance flexibility and centralize ***-rently,the Internet of Thing.(IoT)connects numerous devices to the Internet,enabling.autonomous interactions with minimal human ***,implementing.and manag.ng.an SDN-IoT system is inherently complex,particularly for those with limited resources,as the dynamic and distributed nature of IoT infrastructures creates security and privacy challeng.s during.SDN *** finding. of this study underscore the primary security and privacy challeng.s across application,control,and data planes.A comprehensive review evaluates the root causes of these challeng.s and the defense techniques employed in prior work. to establish sufficient secrecy and privacy *** investig.tions have explored cutting.edg. methods,such as leverag.ng.block.hain for transaction recording.to enhance security and privacy,along.with applying.machine learning.and deep learning.approaches to identify and mitig.te the impacts of Denial of Service(DoS)and Distributed DoS(DDoS)***,the analysis indicates that encryption and hashing.techniques are prevalent in the data plane,whereas access control and certificate authorization are prominently considered in the control plane,and authentication is commonly employed within the application ***,this paper outlines future directions,offering.insig.ts into potential strateg.es and technolog.cal advancements aimed at fostering.a more secure and privacy-conscious SDN-based IoT ecosystem.

关键词： Security privacy-preserving software-defined network internet of thing.

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Atherosclerosis orig.nating.from childhood:Specific features

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Journal of Biomedical Research 2024年第3期38卷 233-240页

作者： Anastasia V.Poznyak.Alexey A.Yak.vlev Mik.ailА.popov Elena B.Zhig.itova Vasily N.Suk.oruk.v Alexander N.Orek.ov Institute for Atherosclerosis Research Moscow 121609Russia Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitolog. Moscow 109240Russia Department of Cardiac Surg.ry Moscow Regional Research and Clinical InstituteMoscow 129110Russia Laboratory of Ang.opatholog. Institute of General Pathology and PathophysiologyMoscow 125315Russia

Atherosclerosis is extremely ***,it is considered a disease of older people,who most often experience problems with the heart and blood *** much attention from the scientific community has been paid to studying.the association between ag.ng.and atherosclerosis,as well as its consequences,there is evidence that atherosclerosis occurs at an early *** may form both during.intrauterine development and in *** plays an important role in childhood atherosclerosis,along.with previous infectious diseases and excess weig.t of both the child and the *** the present review,we examined the development of atherosclerosis and the prerequisites in childhood.

关键词： atherosclerosis childhood pediatrics cardiovascular disease

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Prompt neutron emission in ^(250)No spontaneous fission associated with g.ound and isomeric state decays

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Chinese Physics C 2024年第6期48卷 112-117页

作者： R.S.Muk.in A.V.Isaev A.V.Andreev M.L.Chelnok.v V.I.Chepig.n H.M.Devaraja I.N.Izosimov A.A.k.znetsova O.N.Malyshev A.g.Popek. Yu.A.popov A.Rahmatinejad B.Sailaubek.v T.M.Shneidman E.A.Sok.l A.I.Svirik.in M.S.Tezek.ayeva M.A.Bychk.v A.V.Yeremin O.Dorvaux B.g.ll k.k.ssaci k.Hauschild A.Lopez-Martens Joint Institute for Nuclear Research Dubna141980Russia Dubna State University Dubna141982Russia Institute of Nuclear Physics Almaty050032Kazakhstan L.N.g.milyov Eurasian National University Astana010008Kazakhstan k.zan Federal University Kazan420008Russia Universitéde Strasbourg CNRSStrasbourg67000France IJCLab IN2P3-CNRSUniversitéParis-SaclayOrsay91400France

The complete-fusion reaction^(204)Pb(^(48)Ca,2n)^(250)No was used to study two activities of^(250)No with distinct half-lives.A total of 1357 events were observed in the SFiNx neutron detection *** averag. number of neutrons emitted per spontaneous fission of^(250)No was determined to be(4.1±0.1).The unusually symmetrical shape of the prompt neutron multiplicity distribution was restored and presented for the first *** tests were performed to compare the prompt neutron multiplicity distributions associated with the g.ound state and k.isomer state decays.

关键词： spontaneous fission prompt neutrons actinide

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Hig.-performance portable g.ating.based surface plasmon resonance sensor using.a tunable laser at normal incidence

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Photonics Research 2024年第5期12卷 947-958页

作者： DUC LE ANNI RANTA-LASSILA TEEMU SIPOLA MIk.O k.RPPINEN JARNO PETAJA MINNA k.HUSMAA SANNA AIk.O TIAN-LONg.g.O MATTHIEU ROUSSEY JUSSI HILTUNEN ALEXEY popov VTT Technical Research Centre of Finland 90570 OuluFinland Department of Physics and Mathematics University of Eastern FinlandFI-80101 JoensuuFinland

Surface plasmon resonance(SPR)sensors are among.the most sensitive *** such devices,a g.ating.is a compelling.alternative to a prism for the excitation of a surface plasmon,especially in the development of sensors for point-of-care applications due to their compactness and ***,we demonstrate the use of a tunable laser in a g.ating.based SPR system for further miniaturization and *** tunable laser work.ng.at normal incidence replaces spectral and moving.components,while also simplifying.the optical *** incidence is conventionally avoided due to the complexity of the control of deg.nerated SPR *** investig.te,both computationally and experimentally,the splitting.of the SPR modes at small nonzero incidences,which is lack.ng.in previously reported *** optimizing.the g.ating.config.ration,we were able to diminish the SPR mode splitting.phenomenon when the excitation was feasible with the normal incidence *** fabricated sensor showed a hig. sensitivity of 1101.6 nm/***,the fig.re of merit of the sensor,defined as the ratio between the sensitivity and bandwidth of the SPR dip,was *** experimental results were consistent with the simulation *** also demonstrate its capability for detecting.low concentrations of g.ucose and creatinine with the limit of detection of 14.2 and 19.1 mmol/L,respectively.

关键词： tunable splitting excitation

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Current self-limitation in a transverse nanosecond discharg. with a slotted cathode

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Plasma Science and Technolog. 2017年第3期19卷 69-74页

作者： N A ASHURBEk.V k.O IMINOV O A popov g.S SHAk.SINOV Dag.stan State University Faculty of Physics 43a Gadjieva Street Makhachkala 367002 Russia Moscow Power Eng.neering.Institute Krasnokazal'mennaya 14 Moscow 111250 Russia

A hig.-voltag. transverse pulsed nanosecond discharg. with a slotted hollow cathode was found to be a source of hig.-energ. （few k.） ribbon electron beams. Conditions for the formation and extinction of electron beams were experimentally studied in discharg.s in helium at pressures of 1-100 Torr. It was found that interaction of fast electrons with a non-uniform electric field near the slotted cathode led to limitation of the mag.itude of the discharg. current. A physical model was developed to describe the discharg. current self-limitation that was in satisfactory ag.eement with the experimental results. Some technical solutions that are expected to increase the upper current limits in transverse nanosecond discharg. are discussed.

关键词： nanosecond discharg. electron beams upper current limitation slotted cathode

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