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Mr用于无创性评估直肠癌周围系膜内肉眼可见血管及微小血管侵犯情况

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国际医学放射学杂志 2016年第4期 448-449页

作者： E.Kluza J.p J.E.Kleijnen M.H.Martens D.rennspiess M.Maas c.r.l.p.n.jeukens 卢宝兰 Department of radiology GROW School for Oncology and Developmental Biology Maastricht University Medical Center

摘要目的探讨Mr无创性评估直肠癌周围直肠系膜内肉眼可见血管及微小血管的侵犯情况的应用价值。方法13例直肠癌病人术前均使用1.5 T Mr设备行动态对比增强扫描(DcE-MrI)。利用Mr血管减影技术得到血管后处理影像,由2位医生独立观察评价... 详细信息

摘要目的探讨Mr无创性评估直肠癌周围直肠系膜内肉眼可见血管及微小血管的侵犯情况的应用价值。方法13例直肠癌病人术前均使用1.5 T Mr设备行动态对比增强扫描(DcE-MrI)。利用Mr血管减影技术得到血管后处理影像,由2位医生独立观察评价直肠系膜内肉眼可见血管

关键词： Mr 侵犯情况周围血管直肠癌直肠肿瘤系膜无创性

Efficient guiding and focusing 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 Advanced Material Technology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slits have been widely used in laser-plasma interactions as plasma optical components for generating high-harmonic light and controlling laser-driven particle ***,we propose and demonstrate that periodic thin slits can be regarded as a new breed of optical elements for efficient focusing and guiding of intense laser *** fundamental physics of intense laser interaction with thin slits is studied,and it is revealed that relativistic effects can lead to enhanced laser focusing far beyond the pure diffractive focusing *** addition,the interaction of an intense laser pulse with periodic thin slits makes it feasible to achieve multifold enhancement in both laser intensity and energy transfer efficiency compared with conventional *** results provide a novel method for manipulating ultra-intense laser pulses and should be of interest for many laser-based applications.

关键词： laser pulse intense

cr-induced fusion reactions to synthesize superheavy elements

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nuclear Science and Techniques 2024年第5期35卷 122-130页

作者： S.Madhu H.c.Manjunatha n.Sowmya B.M.rajesh l.Seenappa r.S.Susheela Department of physics R V College of EngineeringBangalore 560074India Visvesvaraya Technological University BelagaviKarnataka 590018India Department of physics Government First Grade CollegeSrinivasapurKarnataka 563135India Department of physics Government First Grade CollegeDevanahallyKarnataka 562110India Department of physics Government First Grade CollegeMulbagalKarnataka 563131India Department of physics Government First Grade collegeNanjangudOoty RoadMysore 571301India

We investigated ^(50,52-54)cr-induced fusion reactions for the synthesis of the superheavy element in the 104≤Z≤122 *** cross sections produced in this investigation using ^(54)cr projectiles were compared with those obtained in prior *** estimated cross sections from this analysis are consistent with the findings of prior *** the current study,the predicted cross section was found to be 42fb at 236 MeV for ^(53)cr+^(243)Am,23.2 fb at 236 MeV for ^(54)cr+^(247)cm,95.6 fb at 240 MeV for ^(53)cr+248Bk,and 1.33 fb at 242 MeV for ^(53)cr+***,these projected cross sections with excitation energy and beam energy will be useful in future cr-induced fusion reaction investigations.

关键词： Fusion cross sections compound nucleus formation probability Survival probability Evaporation residue cross sections

Effect of radiative loss mechanisms on FIr thermometric parameters of nd^(3+)-doped lithium tellurite glasses

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Journal of rare Earths 2024年第7期42卷 1250-1257,I0002页

作者： c.Y.Morassuti A.p.l Silva l.A.O.nunes S.M.lima l.H.c.Andrade Optical and photothermal Spectroscopy Group(GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil renato Archer Information Technology center Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Institute of physics of São carlos University of São PauloSão CarlosSPBrazil

nd^(3+)-doped tellurite glasses are promising materials for thermometers based on the fluorescence intensity ratio(FIr)***,at high nd^(3+)concentrations,energy transfer(ET)processes such as optical reabsorption and cross-relaxation can affect the nd^(3+)emission,which has been little explored in the ***,the present work investigated the use of nd^(3+)-doped tellurite glass(samples doped with nd^(3+)at 0.2 mol%,0.5 mol%,2.0 mol%,and 4.0 mol%)in fluorescence thermometers,in the temperature range from 299 to 371 *** results indicate a strong dependence of the FIr parameters on the nd^(3+)concentration,due to changes in the emission band profiles caused by optical reabsorption of the nd^(3+)emissions and cross-relaxation processes.A decrease of the relative sensitivity of the ratio^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is observed for samples doped with higher amounts of nd^(3+).The maximum relative sensitivity at 299 K is 3.00%/K,which is the highest value among the reported nd^(3+)ions.

关键词： nd^(3+)-doped tellurite glass Fluorescence intensity ratio Optical thermometry Judd-Ofelt rare earths

Stability Analysis of Dc Microgrid clusters Based on Step-by-step System Matrix Building Algorithm

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Journal of Modern power Systems and clean Energy 2024年第3期12卷 900-912页

作者： K.Jithin n.Mayadevi r.Hari Kumar V.p.Mini the Department of Electrical Engineering College of Engineering TrivandrumAPJ Abdul Kalam Technological University(APJAKTU)ThiruvananthapuramIndia

Dc microgrids(DcMGs)are made up of a network of sources and loads that are connected by a number of power electronic converters(pEcs).The increase in the number of these pEcs instigates major concerns in system *** interconnecting the microgrids to form a cluster,the system stability must be *** paper proposes a novel stepby-step system matrix building(SMB)algorithm to update the system matrix of an existing DcMG cluster when a new microgrid is added to the cluster through a distribution *** stability of the individual DcMGs and the DcMG cluster is analyzed using the eigenvalue ***,the particle swarm optimization(pSO)algorithm is used to retune the controller gains if the newly formed cluster is not *** simulation of the DcMG cluster is carried out in MATlAB/Simulink environment to test the proposed *** results are also validated using the Op4510 real-time simulator(rTS).

关键词： converter Dc microgrid cluster eigenvalue interconnection particle swarm optimization system stability system matrix

Single atom cu-n-c catalysts for the electro-reduction of cO_(2) to cO assessed by rotating ring-disc electrode

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Journal of Energy chemistry 2024年第1期88卷 169-182,I0004页

作者： S.pérez-rodríguez M.Gutiérrez-roa c.Giménez-rubio D.ríos-ruiz p.Arévalo-cid M.V.Martínez-Huerta A.Zitolo M.J.lázaro D.Sebastián Instituto de carboquímica(cSIc) Miguel Luesma Castán 450018 ZaragozaSpain Instituto de catálisis y petroleoquímica(cSIc) Marie Curie 228049 MadridSpain Synchrotron SOlEIl L’Orme des MerisiersDépartementale 12891190France

The electrochemical cO_(2) reduction reaction(cO_(2)rr) to controllable chemicals is considered as a promising pathway to store intermittent renewable energy. Herein, a set of catalysts based on copper-nitrogendoped carbon xerogel(cu-n-c) are successfully developed varying the copper amount and the nature of the copper precursor, for the efficient cO_(2)rr. The electrocatalytic performance of cu-n-c materials is assessed by a rotating ring-disc electrode(rrDE), technique still rarely explored for cO_(2)rr. For comparison, products are also characterized by online gas chromatography in a H-cell. The as-synthesized cu-nc catalysts are found to be active and highly cO selective at low overpotentials(from -0.6 to -0.8 V ***) in 0.1 M KHcO_(3), while H_(2) from the competitive water reduction appears at larger overpotentials(-0.9 V vs. rHE). The optimum copper acetate-derived catalyst containing cu-n_(4) moieties exhibits a cO_(2)-to-cO turnover frequency of 997 h^(-1) at -0.9 V vs. rHE with a H_(2)/cO ratio of 1.8. These results demonstrate that rrDE configuration can be used as a feasible approach for identifying electrolysis products from cO_(2)rr.

关键词： cu-n-c carbon xerogel rotating ring disc electrode carbon dioxide reduction reaction carbon monoxide

Measurement of yields and angular distributions ofγ-quanta from the interaction of 14.1 MeV neutrons with oxygen,phosphorus,and sulfur

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chinese physics c 2024年第3期48卷 79-92页

作者： D.n.Grozdanov n.A.Fedorov S.B.Dabylova Yu.n.Kopatch I.n.ruskov V.r.Skoy T.Yu.Tretyakova c.Hramco p.I.Kharlamov G.V.pampushik p.G.Filonchik A.V.Andreev Joint Institute for nuclear research(JInr) DubnaRussia Institute for nuclear research and nuclear Energy Bulgarian Academy of SciencesSofiaBulgaria Faculty of physics Lomonosov Moscow State UniversityMoscowRussia l.n.Gumilyov Eurasian national University AstanaKazakhstan Skobeltsyn Institute of nuclear physics Moscow State UniversityMoscowRussia Institute of chemistry of Moldova ChisinauRepublic of Moldova Moscow Institute of physics and Technology MoscowRussia

A study of the inelastic scattering of neutrons with an energy of 14.1 MeV on the nuclei of oxygen,phosphorus,and sulfur was performed at the TAnGrA facility at JInr(Dubna).The experiment aimed to refine existing data and obtain new data on the yields and angular distributions ofγ-quanta emitted by the studied nuclei due to neutron-induced nuclear reactions using the tagged neutron *** types of detector systems were used to registerγ-***γ-ray yields were measured using a high-purity germanium(HpGe)*** angular distributions ofγ-rays were obtained using a system of 18 scintillation detectors based on bismuth germanite Bi_(4)Ge_(3)O_(12)(BGO)located around the *** performed experiments measured the yields of two transitions for the reaction of tagged neutrons with 16O,nine transitions for the reaction with ^(31)p,and nine transitions for the reaction with ^(32)S for the first *** angular anisotropy of theγ-radiation accompanying the inelastic scattering of neutrons with an energy of 14.1 MeV on ^(31)p nuclei was also measured for the first time.

关键词： tagged neutron method yields of gamma-quanta high-resolution gamma-spectrometry neutron-nuclear reactions neutron scattering

On the functions of astrocyte-mediated neuronal slow inward currents

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neural regeneration research 2024年第12期19卷 2602-2612页

作者： Balázs pál Department of physiology Faculty of MedicineUniversity of DebrecenDebrecenHungary

Slow inward currents are known as neuronal excitatory currents mediated by glutamate release and activation of neuronal extra synaptic n-met hyl-D-aspartate receptors with the contribution of *** events are significantly slower than the excitatory postsynaptic *** of slow inward currents are determined by seve ral factors including the mechanisms of astrocytic activation and glutamate release,as well as the diffusion pathways from the release site towards the extra synaptic recepto *** are stimulated by neuronal network activity,which in turn excite neurons,forming an astrocyte-neuron feedback *** as a consequence of brain edema,astrocytic swelling can also induce slow inward currents under pathological *** is a growing body of evidence on the roles of slow inward currents on a single neuron or local network *** events often occur in synchro ny on neurons located in the same astrocytic *** synchronization of neuronal excitability,slow inward currents also set synaptic strength via eliciting timing-dependent synaptic *** addition,slow inward currents are also subject to non-synaptic plasticity triggered by long-la sting stimulation of the excitatory *** note,there might be important regionspecific differences in the roles and actions triggering slow inward *** greater networks,the pathophysiological roles of slow inward currents can be better understood than physiological *** inward currents are identified in the pathophysiological background of autism,as slow inward currents drive early hypersynchrony of the neural *** inward currents are significant contributors to paroxysmal depolarizational shifts/interictal *** events are related to epilepsy,but also found in Alzheimer's disease,parkinson's disease,and stroke,leading to the decline of cognitive *** with features overlapping with slow inward currents(excitatory,n-methyl-Dasp

关键词： astrocyte cortical spreading depolarization gliotransmission glutamate neural synchronization nMDA receptor paroxysmal depolarizational shift slow inward current

Empirical model for fusion cross sections of ca-induced reactions

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chinese physics 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 physics St.Joseph's College(Autonomous)Affiliated to Bharathidasan UniversityTiruchirappalli620002TNIndia Department of physics Govt.First.Grade CollegeChikkaballapur-562101KarnatakaIndia Department of physics Govt.First.Grade CollegeMalur-563160KarnatakaIndia Department of physics Govt.First.Grade CollegeDevanahalli-562110KarnatakaIndia

A new empirical formula for the astrophysical S-factor has been suggested as a function of the coulomb interaction parameter,center of mass energy,and barrier *** 22 fusion reactions with ^(40,48)ca as projectiles were considered for different targets,leading to compound nuclei with atomic and mass numbers varying between 40≤Z≤≤Z≤112 and 88≤A≤27888≤A≤278,*** fusion cross-sections have been estimated using the geometric factor,the Gamow-Sommerfield factor,and the empirical formula for the *** study's findings showed better agreement with those of available experiments when compared to Wong's *** present work leads to a smaller standard deviation value than Wong's formula when used to correlate the experimental data of calcium-induced fusion ***'s formula provides a good approximation of fusion cross-sections when the center of mass energy is below the fusion barrier when compared to above the fusion barrier.

关键词： fusion cross-sections Wong formula Gamow-Sommerfield-factor Geometric-factor S-factor