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collisionless shock acceleration of protons in a plasma slab produced in a gas jet by the collision of two laser-driven hydrodynamic shockwaves

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Matter and Radiation at Extremes 2024年第2期9卷 12-25页

作者： J.-R.Marquès l.lancia P.loiseau P.Forestier-colleoni M.Tarisien E.Atukpor V.Bagnoud c.Brabetz F.consoli J.domange F.Hannachi P.Nicolaï M.Salvadori B.Zielbauer lUlI CNRSÉcole PolytechniqueCEASorbonne UniversitéInstitut Polytechnique de Paris91128 Palaiseau CedexFrance cEA DAMDIF91297 Arpajon CedexFrance UniversitéParis-Saclay CEALMCE91680 Bruyères-le-ChatelFrance cENBG CNRS-IN2P3Universitéde Bordeaux33175 Gradignan CedexFrance GSI Helmholtzzentrum für Schwerionenforschung GmbH Planckstraße 164291 DarmstadtGermany University of darmstadt Schloßgartenstr.764289 DarmstadtGermany ENEA Fusion and Technologies for Nuclear Safety department C.R.FrascatiVia Enrico Fermi 45FrascatiRomeItaly cElIA Universitéde Bordeaux–CNRS–CEA33405 TalenceFrance UniversitéParis-Saclay CEALIDYL91191 Gif-sur-YvetteFrance

We have recently proposed a new technique of plasma tailoring by laser-driven hydrodynamic shockwaves generated on both sides of a gas jet[Marquès et al.,*** 28,023103(2021)].In a continuation of this numerical work,we study experimentally the influence of the tailoring on proton acceleration driven by a high-intensity picosecond laser in three cases:without tailoring,by tailoring only the entrance side of the picosecond laser,and by tailoring both sides of the gas *** tailoring,the acceleration is transverse to the laser axis,with a low-energy exponential spectrum,produced by coulomb *** the front side of the gas jet is tailored,a forward acceleration appears,which is significantly enhanced when both the front and back sides of the plasma are *** forward acceleration produces higher-energy protons,with a peaked spectrum,and is in good agreement with the mechanism of collisionless shock acceleration(cSA).The spatiotemporal evolution of the plasma profile is characterized by optical shadowgraphy of a probe *** refraction and absorption of this beam are simulated by post-processing 3d hydrodynamic simulations of the plasma *** with the experimental results allows estimation of the thickness and near-critical density of the plasma slab produced by tailoring both sides of the gas *** parameters are in good agreement with those required for cSA.

关键词： acceleration hydrodynamic collision

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Efficacy of nonsolvent flower pollen extracts in healthy women with urinary incontinence:A randomized,double-blind,placebo-controlled,parallel study

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current Urology 2024年第3期18卷 203-211页

作者： Marc Moulin Erin d.lewis david c.crowley colleen E.May Malkanthi Evans KGK Science Inc. LondonOntarioCanada Graminex L.L.C.SaginawMIUSA

Background Urinary incontinence(UI)is a debilitating and common condition that adversely affects quality of *** and surgical approaches for managing UI symptoms may result in undesirable risks and *** randomized,double-blind,placebo-controlled,parallel study investigated the efficacy of 2 nonsolvent flower pollen extracts on UI in healthy *** and methods One-hundred and fourteen women aged 40–75 years who scored≥5 on the International consultation on Incontinence Questionnaire-Urinary Incontinence Short Form(IcIQ-SF)were randomized to receive either Graminex®RcT Fem™UI,Graminex®PollenBerry®,or placebo for 24 *** primary outcome was the change in the IcIQ-SF score between the trial and placebo groups after 24 weeks of *** secondary outcomes included changes in the frequency of nocturia(recorded in 3-day void diaries)and 24-hour leakage volume(assessed via pad weight)after 6,12,18,and 24 weeks of supplementation and changes in stress-induced urinary leakage volume(after completion of a provocative maneuver challenge)after 24 weeks of *** All the groups demonstrated improvement in IcIQ-SF scores at week 24(pcT Fem™UI group had the greatest improvement in IcIQ-SF scores(−4.07±3.4),followed by the PollenBerry®group(−3.34±2.87)and placebo group(−2.61±3.52).The RcT Fem™UI group had corresponding improvements in 24-hour leakage volume(−17.68±39.84 g)and frequency of nocturia(−0.52±1.26)(p≤0.05).PollenBerry®supplementation significantly improved stress-induced urinary leakage volume(−7.12±15.64 g)at week *** study products demonstrated safe hematological and chemical *** RcT Fem™UI supplementation resulted in significant and clinically meaningful reductions in UI severity,with corresponding improvements in daily urinary leakage volume and frequency of ***®significantly improved stress-induced urinary leakage volume,suggesting that it may be eff

关键词： Urinary incontinence Pollen extract Healthy women dietary supplement IcIQ-SF Urinary leakage

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应用自动化评估软件提高放射技师的乳腺断层摄影筛查能力

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国际医学放射学杂志 2024年第5期 622-623页

作者： G.Gennaro l.Povolo S.d.Genio l.ciampani c.Fasoli P.carlevaris 华蓓

目的应用自动化软件评估乳腺断层摄影筛查中摆位和压迫的正确性，提高乳腺放射技师的工作能力。方法采用前瞻性队列的回顾性纵向分析，要求6位具有不同经验

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重症监护室护士限制治疗努力的能力:整合性综述

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International Journal of Nursing Sciences 2024年第1期11卷 143-154,I0003页

作者： Elvia R.lopez-Panza Vanessa c.Pacheco-Roys Kelly J.Fernandez-Ahumada diana c.díaz-Mass María Y.Exposito-concepcion Elizabeth Villarreal-cantillo cesar I.Aviles Gonzalez Nursing department Universidad del NorteBarranquillaColombia Nursing Program Faculty of Health SciencesUniversidad Popular del CesarValleduparColombia clínica Valledupar ValleduparColombia Hospital Universidad del Norte SoledadColombia department of Medical Sciences and Public Health University of CagliariCittadella Universitaria di MonserratoCagliariItaly

目的在重症监护病房(IntensivecareUnit,IcU),护土难免会遇到需要限制治疗努力(limiting therapeutie efort,lTE)的患者,尽管多数护士还缺乏为这些临终患者及其家庭提供支持的准备。本综述旨在描述IcU护士在lTE中需要具备的能力。方法对... 详细信息

目的在重症监护病房(IntensivecareUnit,IcU),护土难免会遇到需要限制治疗努力(limiting therapeutie efort,lTE)的患者,尽管多数护士还缺乏为这些临终患者及其家庭提供支持的准备。本综述旨在描述IcU护士在lTE中需要具备的能力。方法对2010年--2023年发表的文献进行综述。系统检索了5个数据库:Medline、Wiley Online library、SciElO、Sciencedirect和Web of Science。使用关键评估项目工具西班牙语版(critical Appraisal Skills Programme in Spanish,cASPe)作为评判性阅读工具。使用牛津循证医学中心(center for Evidence-Based Medicine.,cEBM)评估工具确定证据级别和推荐强度。结果共纳入25篇文献。IcU护士lTE护理的能力包括对患者的直接护理、以家庭为中心的护理以及护士在团队中的作用。该综述确定了3个类别的能力:作为患者、家庭与跨学科团队之间维护者的能力,在lTE方面的决策能力,在患者生命末期治疗和护理干预的能力。结论IcU护士在lTE方面需要具备相应的能力,这对患者的生活质量死亡尊严以及患者家庭应对悲伤的全面支持至关重要。

关键词：重症监护家庭支持重症监护病房护士的作用安宁疗护专业能力

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Electrokinetic-mechanism of water and furfural oxidation on pulsed laser-interl.c.d.cu_(2)O and coO on nickel foam

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Journal of Energy chemistry 2024年第4期91卷 145-154页

作者： Yewon Oh Jayaraman Theerthagiri M.l.Aruna Kumari Ahreum Min cheol Joo Moon Myong Yong choi department of chemistry(BK21 FOUR) Research Institute of Natural SciencesGyeongsang National UniversityJinju 52828Republic of Korea department of chemistry The Oxford College of ScienceBengaluruKarnataka 560102India core-Facility center for Photochemistry&Nanomaterials Gyeongsang National UniversityJinju 52828Republic of Korea

The electrocatalytic oxidation of biomass-derived furfural(FF)feedstocks into 2-furoic acid(FA)holds immense industrial potential in optics,cosmetics,polymers,and ***,we fabricated co O/Ni O/nickel foam(NF)and cu_(2)O/Ni O/NF electrodes via in situ pulsed laser irradiation in liquids(PlIl)for the bifunctional electrocatalysis of oxygen evolution reaction(OER)and furfural oxidation reaction(FOR),*** oxidation of NF surface to NiO and deposition of coO and/or cu_(2)O on NF during PlIl offer distinct advantages for enhancing both the OER and ***/NiO/NF electrocatalyst provides a consistently low overpotential of~359 m V(OER)at 10 m A/cm^(2),achieving the maximum FA yield(~16.37 m M)with 61.5%selectivity,79.5%carbon balance,and a remarkable Faradaic efficiency of~90.1%during 2 h of FOR at 1.43 V(*** hydrogen electrode).Mechanistic pathway via in situ electrochemical-Raman spectroscopy on coO/NiO/NF reveals the involvement of phase transition intermediates(NiOOH and coOOH)as surface-active centers during electrochemical *** carbonyl carbon in FF is attacked by hydroxyl groups to form unstable hydrates that subsequently undergo further oxidation to yield FA *** method holds promise for large-scale applications,enabling simultaneous production of renewable building materials and fuel.

关键词： Pulsed laser irradiation in liquids Water and furfural oxidation In situ Raman spectroscopy coO/NiO/nickel foam cu_(2)O/Nio/nickel foam 2-furoic acid

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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

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crystal structure and luminescence dynamics of highly pure liM(PO_(3))_(3):Eu^(3+)(M=Sr,ca) red phosphors for white light emitting diodes

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Journal of Rare Earths 2024年第8期42卷 1470-1478,I0002页

作者： Payal Khajuria M.Manhas A.K.Bedyal Ankush Vij H.c.Swart Vinay Kumar department of Physics and Astronomical Sciences Central University of JammuRahy-Suchani.Samba1143J&KIndia department of Physics School of SciencesCluster University of JammuCanal RoadJammu180001India department of Physics University of Petroleum and Energy StudiesDehradunUttarakhand248007India department of Physics University of the Free StateP.O.Box 339BloemfonteinZA 9300South Africa

Highly pure red phosphors liM(PO_(3))_(3):Eu^(3+)(M=Sr,ca) doped with Eu^(3+)(1 mol%) were synthesized via solution combustion method and their crystal structure and luminescence dynamics were studied to explore its suitability in white light emitting *** Rietveld refinement analysis of the powder Xray diffraction patterns reveals that the phosphors belong to the pure triclinic phase of liSr(PO_(3))_(3) and lica(PO_(3)) with space group P-1(2).The scanning electron microscopy images showed the agglomerated *** photoluminescence emission spectra under 393 nm show an orange band at 594 nm and a red band at 613 nm ascribed to ^(5)d_(0)→^(7)F_(1).^(5)d_(0)→^(7)F_(2) transitions of Eu^(3+)ion in both the ***,the spectroscopic properties such as luminescence behaviour,and Stark splitting were used to examine the symmetry of Eu^(3+)ions in liM(PO_(3))_(3):Es^(3+)(M=Sr,ca) phosphors in terms of distortion induced upon *** Stark splitting shows that the actual site symmetry for Eu^(3+)ion was estimated to be d_(2) type for both *** photometric properties of lica(PO_(3))_(3):Eu^(3+)such as commission International de l'Eclairage coordinates(x=0.64,y=0.36) near to the standard one(red),high color purity(95%) and higher brightness reveal that the phosphor has the capability of acting as a red component in n-UV white light emitting diodes.

关键词： Photoluminescence Phosphate WlEds Stark splitting Rare earths

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由超拍电子伏特加速器产生的超高能伽马射线气泡

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Science Bulletin 2024年第4期69卷 449-457页

作者： lHAASO collaboration Zhen cao chuandong Gao cong li Ruo-Yu liu Ruizhi Yang 不详 Key laboratory of Particle Astrophyics&Experimental Physics division&computing center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of chinese Academy of Sciences Beijing 100049China TIANFU cosmic Ray Research center ChengduChina Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China University of Science and Technology of china Hefei 230026China

We report the detection of aγ-ray bubble spanning at least 100deg2 in ultra-high energy(UHE)up to a few PeV in the direction of the star-forming region cygnus X,implying the presence super PeVatron(s)accelerating protons to at least 10 PeV.A log-parabola form with the photon indexΓ(E)=(2.71±0.02)+(0.11±0.02)×log10(E/10 TeV)is found fitting the gamma-ray energy spectrum of the bubble *** sources,“hot spots”correlated with very massive molecular clouds,and a quasi-spherical amorphousγ-ray emitter with a sharp central brightening are observed in the *** the core of~0.5°,spatially associating with a region containing massive OB association(cygnus OB2)and a microquasar(cygnus X-3),as well as previously reported multi-TeV sources,an enhanced concentration of UHEγ-rays is observed with 2 photons at energies above 1 *** general feature of the bubble,the morphology,and the energy spectrum,are reasonably reproduced by the assumption of a particle accelerator in the core,continuously injecting protons into the ambient medium.

关键词： cosmic rays γ-rays Interstellar medium Star cluster

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Finite barrier bound state

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light(Science & Applications) 2024年第4期13卷 664-671页

作者： Tao liu Kai Bai Yicheng Zhang duanduan Wan Yun lai c.T.chan Meng Xiao Key laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and Technology Wuhan University430072 WuhanChina. National laboratory of Solid State Microstructures School of Physicsand Collaborative Innovation Center of Advanced MicrostructuresNanjing University210093 NanjingChina. department of Physics The Hong Kong University of Science and TechnologyClear Water BayKowloon999077Hong KongChina. Wuhan Institute of Quantum Technology 430206 WuhanChina

A boundary mode localized on one side of a finite-size lattice can tunnel to the opposite side which results in unwanted *** wisdom tells that the tunneling probability decays exponentially with the size of the system which thus requires many lattice sites before eventually becoming negligibly *** we show that the tunneling probability for some boundary modes can apparently vanish at specific ***,similar to bound states in the continuum,a boundary mode can be completely trapped within very few lattice sites where the bulk bandgap is not even *** intriguingly,the number of trapped states equals the number of lattice sites along the normal direction of the *** provide two configurations and validate the existence of this peculiar finite barrier-bound state experimentally in a dielectric photonic crystal at microwave *** work offers extreme flexibility in tuning the coupling between localized states and channels as well as a new mechanism that facilitates unprecedented manipulation of light.

关键词： boundary state eventually

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Radiation Spectral Analysis of 3d dust Molecular clusters(PAHs)and Peptoids under Ionization and Electric Field in ISM

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Research in Astronomy and Astrophysics 2024年第1期24卷 70-77页

作者： Ruiqing Wu chunhua Zhu Guoliang lü Xiaojiao Zhang Xizhen lu Jinlong Yu Wujin chen Mengqiu long School of Physics and Electronics Central South UniversityChangsha 410083China School of Physical Science and Technology Xinjiang UniversityUrumqi 830046China School of Microelectronics and Physics Hunan University of Technology and BusinessChangsha 410205China college of Mechanical and Electronic Engineering Tarim UniversityAlar 843300China School of Medicine Xinjiang Medical UniversityUrumqi 830011China

Polycyclic aromatic hydrocarbons(PAHs),PANHs,and peptoids dust spectral calculations from the interstellar medium(ISM)are important for dust observations and *** goal is to calculate the radiation spectrum of spherical PAHs dust clusters in a vacuum containing ionized and applied in the presence of an electric *** propose a new simple computational model to calculate the size of three-dimensional spherical dust clusters formed by different initial dust *** the Vienna Ab-initio Simulation Package code,the density functional theory with the generalized approximation was used to calculate the electron density gradient and obtain the radiation spectrum of *** the radius of spherical dust clusters is~[0.009-0.042]μm,the dust radiation spectrum agrees well with the Z=0.02 mMMP stellar spectra,and the PAHs radiation spectrum of NGc 4676 at wavelengths of(0-5]μm and(5-10]μm,*** the ionized state,the N-PAH,c_(10)H_(9)N,2(c_(4)H_(4))^(1+),and peptoids 4(cHON),(c_(8)H_(10)N_(2)O_(5))^(1+)dust clusters at 3.3μm,while the 2(c_(22)H_(21)N_(3)O_(2))^(1+),4(cHON)dust clusters at 5.2μm have obvious *** is a characteristic of part of PAHs and peptoids clusters radiation at the nearinfrared wavelength of 2μ***,especially after applying an electric field to the dust,the emission spectrum of the dust increases significantly in the radiation wavelength range[3-10]μ***,the dust clusters of PAHs,PANHs,and peptoids of the radius size~[0.009-0.042]μm are likely to exist in the ISM.

关键词： ISM:structure ISM:molecules radiation mechanisms:general (ISM:)dust extinction

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