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Isochrone fitting of galactic globular Clusters—Ⅵ.High-latitude Clusters NgC 5024 (m53),NgC 5053,NgC 5272 (m3),NgC 5466,and NgC7099 (m30)

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Research in Astronomy and Astrophysics 2024年第6期24卷 170-190页

作者： g.A.gontcharov S.S.Savchenko A.A.marchuk C.J.Bonatto o.S.Ryutina m.Yu.Khovritchev V.B.Il'in A.V.mosenkov D.m.Poliakov A.A.Smirnov Central(Pulkovo)Astronomical observatory Russian Academy of SciencesPulkovskoye chaussee 65/1St.Petersburg 196140Russia Saint Petersburg State University Universitetskij pr.28St.Petersburg 198504Russia Special Astrophysical observatory Russian Academy of Sciences369167 Nizhnij ArkhyzRussia Departamento de Astronomia Instituto de FísicaUFRGSAv.Bento Gonçalves9500Porto AlegreRSBrazil Saint Petersburg University of Aerospace Instrumentation Bol.Morskaya ul.67ASt.Petersburg 190000Russia Department of Physics and Astronomy Brigham Young UniversityN283 ESCProvoUT 84602USA

We fit various color–magnitude diagrams(CmDs) of the high-latitude galactic globular clusters NgC 5024(m53),NgC 5053,NgC 5272(m3),NgC 5466,and NgC 7099(m30) by isochrones from the Dartmouth Stellar Evolution Database and Bag of Stellar Tracks and Isochrones for α–enrichment [α/fe] = +*** the CmDs,we use data sets from Hubble Space Telescope,gaia,and other sources utilizing,at least,25 photometric filters for each *** obtain the following characteristics with their statistical uncertainties for NgC 5024,NgC 5053,NgC 5272,NgC 5466,and NgC 7099,respectively:metallicities [fe/H] =-1.93 ± 0.02,-2.08 ± 0.03,-1.60 ± 0.02,-1.95 ± 0.02,and-2.07 ± 0.04 dex with their systematic uncertainty 0.1 dex;ages 13.00 ± 0.11,12.70 ± 0.11,11.63 ± 0.07,12.15 ± 0.11,and 12.80 ± 0.17 gyr with their systematic uncertainty 0.8 gyr;distances(systematic uncertainty added) 18.22 ± 0.06 ± 0.60,16.99 ± 0.06 ± 0.56,10.08 ± 0.04 ± 0.33,15.59 ±0.03 ± 0.51,and 8.29 ± 0.03 ± 0.27 kpc;reddenings E(B-V) = 0.023 ± 0.004,0.017 ± 0.004,0.023 ± 0.004,0.023 ± 0.003,and 0.045 ± 0.002 mag with their systematic uncertainty 0.01 mag;extinctions AV= 0.08 ± 0.01,0.06 ± 0.01,0.08 ± 0.01,0.08 ± 0.01,and 0.16 ± 0.01 mag with their systematic uncertainty 0.03 mag,which suggest the total galactic extinction AV= 0.08 across the whole galactic dust to extragalactic objects at the North galactic *** horizontal branch morphology difference of these clusters is explained by their different metallicity,age,mass-loss efficiency,and loss of low-mass members in the evolution of the core-collapse cluster NgC 7099 and loose clusters NgC 5053 and NgC 5466.

关键词： (stars:)Hertzsprung Russell and C-m diagrams (ISm:)dust extinction (galaxy:)globular clusters:general (galaxy:)globular clusters:individual(NgC 5024,NgC 5053,NgC 5272,NgC 5466,NgC7099)

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A native herbaceous community exerts a strong allelopathic effect on the woody range-expander Betula fruticosa

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Journal of Plant Ecology 2024年第4期17卷 131-140页

作者： Lichao Wang Ayub m.o.oduor Yanjie Liu State Key Laboratory of Black Soils Conservation and Utilization Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China University of Chinese Academy of Sciences Beijing 100049China Department of Applied Biology Technical University of KenyaNairobiKenya

Biological invasions by alien and range-expanding native plant species can suppress native plants through ***,the homeland security hypothesis suggests that some native plants can resist invasion by producing allelopathic compounds that inhibit the growth of invasive *** research has focused on allelopathic interactions between individual native and invasive plant species,with less emphasis on how allelopathy helps entire native communities resist ***,limited knowledge exists about allelopathic interactions between range-expanding native species and recipient native communities,and their influence on invasion *** bridge this knowledge gap,we conducted two greenhouse competition experiments to test reciprocal allelopathic effects between a native woody range-expanding species,Betula fruticosa,and a community of four native herbaceous species(Sanguisorba officinalis,gentiana manshurica,Sium suave and Deyeuxia angustifolia)in *** assessed whether *** and the native community differed in their competitive effects and responses,and whether these were influenced by activated carbon,which neutralizes allelochemicals in the *** carbon reduced the suppressive effects of the native community on the above-ground biomass of ***,which indicates that the native community exerted a strong allelopathic effect on *** contrast,activated carbon only marginally enhanced the suppressive effects of *** on the native community,which indicates that allelopathy is not the primary mechanism by which *** exerts its ***,these findings support the homeland security hypothesis and suggest that biotic resistance from the native herbaceous community may limit the invasion success of the woody range-expander ***.

关键词： allelochemicals competition encroachment global change non-native shrub

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fast prediction of rain erosion in wind turbine blades using a data-based computational tool

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Journal of Hydrodynamics 2024年第3期36卷 504-518页

作者： Juan m.gimenez Sergio R.idelsohn Eugenio oñate Centre Internacional de mètodes Numèrics en Enginyeria(CImNE) Edifici C1 Campus Nord UPC C/Gran CapitàS/NBarcelonaSpain

Wind turbines(WTs)face a high risk of failure due to environmental factors like erosion,particularly in high-precipitation areas and offshore *** this paper we introduce a novel computational tool for the fast prediction of rain erosion damage on WT blades that is useful in operation and maintenance decision making *** approach is as follows:Pseudo-Direct Numerical Simulation(P-DNS)simulations of the droplet-laden flow around the blade section profile are employed to build a high-fidelity data set of impact statistics for potential operating *** this database as training data,a machine learning-based surrogate model provides the feature of the impact pattern over the 2-D section for given wind and rain *** this information,a fatigue-based model estimates the remaining lifetime and erosion damage for both homogeneous and coating-substrate blade *** prediction is done by quantifying the accumulated droplet impact energy and evaluating operative conditions over time periods for which the weather at the installation site is *** this work,we describe the modules that compose the prediction method,namely the database creation,the training of the surrogate model and their coupling to build the prediction ***,the method is applied to predict the remaining lifetime and erosion damage to the blade sections of a reference *** evaluate the reliability of the tool,several site locations(offshore,coastal,and inland),the coating material and the coating thickness of the blade are *** few minutes we are able to estimate erosion after many years of *** results are in good agreement with field observations,showing the promise of the new rain erosion prediction approach.

关键词： Wind turbine blades leading edge erosion fatigue Pseudo-Direct Numerical Simulation(P-DNS) machine learning eblader

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Effect of toroidal mode coupling on explosive dynamics of m/n=3/1 double tearing mode

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Plasma Science and Technology 2024年第10期26卷 8-16页

作者： Xingqiang LU ge gAo Zhiwei ma Wei gUo Xin LI College of Nuclear Equipment and Nuclear Engineering Yantai UniversityYantai 264005People’s Republic of China Institute for fusion Theory and Simulation Department of PhysicsZhejiang UniversityHangzhou 310027People’s Republic of China

The CLT code was used to quantitatively study the impact of toroidal mode coupling on the explosive dynamics of the m/n=3/1 double tearing *** focus of this study was on explosive reconnection processes,in which the energy bursts and the main mode no longer dominates when the separation between two rational surfaces is relatively large in the medium *** development of higher m and n modes is facilitated by a relatively large separation between two rational surfaces,a small q_(min)(the minimum value of the safety factor),or low *** relationships between the higher m and n mode development,explosive reconnection rate,and position exchange of 3/1 islands are summarized for the first *** plays a more important role than q_(min)in enhancing the development of higher m and n *** a relatively large separation,the good development of higher m and n modes greatly reduces the reconnection rate and suppresses the development of the main mode,resulting in the main mode not being able to develop sufficiently large to generate the position changes of 3/1 islands.

关键词： toroidal mode coupling higher m and n modes explosive growth reconnection rate position change

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Carbon monoxide as C1 Building Block in fine Chemical Synthesis

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Chinese Journal of Chemistry 2024年第2期42卷 199-221页

作者： Rui m.B.Carrilho mario J.f.Calvete gabor mikle Laszlo Kollar mariette m.Pereira University of Coimbra Coimbra Chemistry CentreDepartment of ChemistryRua Larga3004-535 CoimbraPortugal Department of general and Inorganic Chemistry and ELKH-PTE Research groupfor Selective Chemical Syntheses University of PecsIfjusag utja 6H-7624 PecsHungary

Carbon monoxide(Co)has become one of the most relevant and versatile renewable C1 building blocks for chemical synthesis,especially in the fine chemicals industry,due to the development of efficient and selective catalysts for its *** this review,we present a comprehensive critical analysis of the last 10 years literature on the use of Co as a renewable feedstock for fine chemicals *** review is organized by type of catalytic reaction,namely alkene and alkyne carbonylation,hydroformylation,carbonylation of aryl halides,carbonylative cross-coupling and C-H *** examples of the synthesis of relevant building blocks and/or known pharmaceuticals are *** is placed on examples of utilizing Co as the C1 building block in one or more catalytic *** catalyst used and the reaction conditions are consistently presented throughout all of the examples.

关键词： Carbon monoxide fine chemicals Carbonylation Hydroformylation C-H functionalization

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New opportunities for Neutrons in Environmental and Biological Sciences

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frontiers of Environmental Science & Engineering 2024年第7期18卷 179-186页

作者： Alexander Johs Shuo Qian Leighton Coates Brian H.Davison James g.Elkins Xin gu Jennifer morrell-falvey Hugh o'Neill Jeffrey m.Warren Eric m.Pierce Kenneth Herwig oak Ridge National Laboratory Oak RidgeTN37831USA

The use of neutron methods in environmental and biological sciences is rapidly emerging and accelerating with the development of new instruments at neutron user *** article,based on a workshop held at oak Ridge National Laboratory(oRNL),offers insights into the application of neutron techniques in environmental and biological *** highlight recent advances and identify key challenges and potential future research *** include soil and rhizosphere processes,root water dynamics,plant-microbe interactions,structure and dynamics of biological systems,applications in synthetic biology and enzyme engineering,next-generation bioproducts,biomaterials and bioenergy,nanoscale structure,and fluid dynamics of porous materials in *** provide an outlook on emerging opportunities with an emphasis on new capabilities that will be enabled at the Spallation Neutron Source Second Target Station currently under design at *** mission of scientific neutron user facilities worldwide is to enable science using state-of-the-art neutron *** aim to encourage researchers in the environmental and biological research community to explore the unique capability afforded by neutrons at these facilities.

关键词： Neutrons Environment Biology Neutron imaging Neutron scattering Second Target Station(STS)

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Shape and composition evolution of Pt and Pt_(3)m nanocrystals under HCl chemical etching

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Chinese Chemical Letters 2024年第9期35卷 403-407页

作者： Lian Sun Honglei Wang ming ma Tingting Cao Leilei Zhang Xingui Zhou State Key Laboratory of NBC Protection for Civilian Beijing 102205China Science and Technology on Advanced Ceramic fibers and Composites Laboratory College of Aerospace Science and EngineeringNational University of Defense TechnologyChangsha 410073China School of materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Crystal materials and Institute of Crystal materials Shandong UniversityJi’nan 250100China

Controlling the shape and composition of Pt-based nanocrystals is essential to improve electrocatalytic *** this work,we have carefully investigated the evolution process of morphology and composition for Pt and Pt_(3)m(m=Ni,Co)nanocrystals by hydrochloric acid(HCl)*** a result,only Pt_(3)Ni nanocrystals successfully formed unsaturated step-like atoms on the surface and then constructed high-index facets(HIfs),while Pt and Pt_(3)Co preserved a good octahedron *** functional theory(DfT)calculation suggests that Cl-ions can be tightly adsorbed on the surface of Pt_(3)Ni rather than other nanocrystals,which hinders the deposition of newly-reduced atoms and thus regulating the surface ***,the etching of surface transitional metals further accelerates the formation of *** by the active sites on the surface,HCl-Pt-Ni exhibited a~10.8 and~11.3 times higher oxygen reduction reaction(oRR)mass and specific activities than commercial Pt/C catalyst,and possessed a good durability after 10,000 cycles *** work gives a deep insight into the design of high-performance Pt-based oRR catalysts.

关键词： Electrocatalysts Nanocrystals Platinum oxygen reduction reaction DfT calculation

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Tracking the Ti^(4+)substitution in phlogopite by spectroscopic imaging:A tool for unravelling the growth of micas at HP-HT conditions

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geoscience frontiers 2024年第3期15卷 1-13页

作者： g.Della Ventura N.El moutaouakkil B.Boukili S.Bernardini A.Sodo L.Pronti m.Cestelli-guidi f.Holtz f.Lucci Dipartimento di Scienze UniversitàRoma TreRomaItaly INfN-LNf via Fermi 200040 FrascatiRomaItaly INgV Via di Vigna Murata 60500143 RomaItaly Laboratory of géosciences Water and Environment.Department of Earth Sciences.Faculty of SciencesUniversity Mohammed VRabatMorocco Leibnitz Universität Hannover Institute of MineralogyCallinstr 330167 HannoverGermany Dipartimento di Scienze della Terra e geoambientali Universitàdi Bari“Aldo Moro”BariItaly

Phlogopite solid-solutions have a wide pressure-temperature(P-T)stability field and are ubiquitous in a wide variety of geological settings,from deep lithosphere magmatic environments to upper crust metamorphic *** composition represents therefore a valuable physical-chemical archive and may provide important information regarding its crystallization and the petrogenesis of the *** this paper we examine the phlogopite phenocrysts from the well-known fort Regent mica-bearing lamprophyre minette from ***(Island of Jersey,UK).Phlogopite phenocrystals from lamprophyres generally show normal-step and continuous compositional zoning,however those from the fort Regent minette show a peculiar texture characterized by dark brown high-Ti(average Tio_(2)≈8.5 wt.%)cores enveloped by euhedral low-to mid-amplitude zonation due to oscillatory contents in Ti,fe and ***-barometry modelling based on biotite-only composition yields relatively high P-T estimates(T≈970±54℃at P≈0.73±0.13 gPa)for cores whereas lower values(T≈790±54℃at P≈0.29±0.13 gPa)are obtained for the outer *** temperatures(T≈1075±54℃)but extremely high and anomalous pressure values(P≈1.82±0.13 gPa)are obtained for the yellowish inner *** combination of electron micro probe(EmP)analysis and single-crystal infra-red(fTIR)imaging in the oH-stretching region shows that the exceptional and oscillatory Ti contents are due to the Ti-vacancy substitution,typical of crystallization and growth processes of HP/HT *** imaging provides additional insight for this process,confirming the dominant dioctahedral nature for the Ti-fe-rich cores and outer *** of thermobaric estimates obtained from the phlogopite compositiononly model,based on the fine-scale compositional evolution,shows that pressure-temperature values from low-Ti high-mg domains should be carefully evaluated because the substitution mechanisms during the dark mica growth are not univocal

关键词： Ti-phlogopite Jersey minette(UK) Ti-substitution fTIR imaging Raman imaging Thermobarometric modelling

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Two-Dimensional metallophthalocyanine Nanomaterials for Electrocatalytic Energy Conversion

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Energy & Environmental materials 2024年第4期7卷 364-385页

作者： Xinqi Wang Shaohui Sun Jiahao Yao Hao Wan Renzhi ma Wei ma School of Chemical Engineering and Zhongyuan Critical metals Laboratory Zhengzhou University Research Center for materials Nanoarchitectonics (maNA) National Institute for Materials Science (NIMS)

Crowing energy demand drives the rapid development of clean and reliable energy *** the past years,the exploration of novel materials with considerable efficiency and durability has drawn attention in the area of elec... 详细信息

关键词： conjugated nanostructure electrocatalysis 2D metallophthalocyanines

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Efficacy of acupuncture on cancer pain:A systematic review and meta-analysis

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Journal of Integrative medicine 2024年第3期22卷 235-244页

作者： miguel faria mónica Teixeira maria João Pinto Paulo Sargento Núcleo de Investigação em Ciências e Tecnologias da Saúde Instituto Politécnico da Lusofonia1950-396 LisboaPortugal Clínica São João de Deus 1700-048 LisboaPortugal REQUImTE/LAQV(Rede de Química e Tecnologia/Laboratório Associado para a Química Verde) Instituto Superior de EngenhariaInstituto Politécnico do Porto4051-401 PortoPortugal Hospital SoERAD 2560-312 Torres VedrasPortugal Centro de Estudos Avançados em Direito“francisco Suarez ”1749-024 LisboaPortugal

Background:Pain associated with cancer is one of the greatest causes of reduced quality of life in *** is one of the treatments used to address this issue,with the great advantage of having little or no side effects,especially when compared with pharmacological ***:The aim of this systematic review and meta-analysis was to evaluate the current evidence regarding the efficacy of acupuncture for cancer *** strategy:Six electronic databases(Pubmed,EBSCo,Cochrane Library,Scielo,b-on and Scopus)were searched for relevant articles about pain relief in cancer patients from their beginning until 2022using meSH terms such as“acupuncture,”“electroacupuncture,”“ear acupuncture,”“acupuncture analgesia,”“oncological pain,”and“cancer pain.”Inclusion criteria:Studies included were randomized controlled trials(RCTs)where acupuncture was compared with no treatment,placebo acupuncture or usual *** extraction and analysis:Three independent reviewers participated in data extraction and evaluation of risk of bias,and a meta-analysis was *** primary outcome was pain intensity,measured with the visual analog scale,numeric rating scale,or brief pain *** outcomes also assessed were quality of life,functionality,xerostomia,pain interference,and analgesic *** were expressed as standardized mean difference(SmD)with 95%confidence interval(CI).Results:Sixteen RCTs with a total of 1124 participants were included in the meta-analysis,with the majority of the studies presenting a low or unclear risk of *** was more effective in reducing pain than no treatment(SmD=–0.90,95%CI[–1.68,–0.12]),sham acupuncture(SmD=–1.10,95%CI[–1.59,–0.61])or usual care(SmD=–1.16,95%CI[–1.38,–0.93]).Conclusion:The results of this study suggest that acupuncture may be an effective intervention to reduce pain associated with *** some limitations due to the low quality and small sample size of some included st

关键词： Acupuncture Cancer pain meta-analysis Systematic review

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