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Fungal Diversity 2012年第6期57卷 84-146页

作者： donald m.walker Lisa A.Castlebury Amy Y.Rossman Luis C.mejía James F.White Department of Natural Sciences The University of FindlayFindlayOH 45840USA Systematic mycology&microbiology Laboratory USDA Agricultural Research ServiceBeltsvilleMD 20705USA Smithsonian Tropical Research Institute Apartado0843-03092BalboaAnconRepublic of Panama Department of Plant Biology and Pathology Rutgers UniversityNew BrunswickNJ 08901USA

Species of Ophiognomonia are leaf-inhabiting endophytes,pathogens,and saprobes that infect plants in the families Betulaceae,Fagaceae,Juglandaceae,Lauraceae,malvaceae,Platanaceae,Rosaceae,Salicaceae,and *** on extensive collecting,this speciesrich genus is now known to have a world wide distribution in primarily temperate areas,although some species are known from the *** of DNA sequences from three markers including guanine nucleotide-binding protein subunit beta-like protein(mS204),translation elongation factor 1α(tef-1α),and the ITS region including ITS1,5.8 S rDNA and ITS2 regions(ITS)were used to define phylogenetic species in *** plant association correlated with these ***-five new species of Ophiognomonia and two new combinations are proposed with descriptions and *** addition,descriptions and illustrations are provided for 12 other species of Ophiognomonia.A key is provided to the 45 currently accepted species of *** disposition of additional names in Ophiognomonia is also discussed.

关键词： Birch foliar pathogen Butternut canker GCPSR Genealogical sorting index Host associations mS204 multilocus phylogeny Walnut anthracnose and leaf blotch

Double-up for single-ion masses

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Nuclear Science and Techniques 2023年第7期34卷 159-161页

作者： Philip m.walker Department of Physics University of SurreyGuildford GU27XHUK

A cunning addition for the determination of nuclear masses provides world-leading sensitivity for accurate *** is already opening up new physics and *** may sound simple to weigh an atomic nucleus,but there is more to it than you might think,especially when the nucleus is very *** out the properties of such fleeting nuclei,perhaps surviving for only a few milliseconds,can solve long-standing science ***-lived nuclei are key to our understanding not only of how neutrons and protons bind together in nuclei,but also of the way that explosive events in the cosmos tell us about the life cycle of stars.

关键词： addition unstable stars

Implementation of Gas Control Algorithm in EASTPCS

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Plasma Science and Technology 2009年第2期11卷 231-235页

作者：袁旗平肖炳甲 m.walker 王华忠 Institute of Plasma Physics Chinese Academy of Sciences General Atomics DIII-D National Fusion Facility

In this paper, gas control on EAST in open and closed loop is discussed and its implementation into EASTPCS （plasma control system for the experimental advanced supercon- ducting tokamak） is introduced. Using a model to describe the plasma density response to the gas puff command, a gas simulation server （simserver） using mATLAB simulink tools and real time workshop was built up. Proper operation of the gas control algorithm was verified using this simserver. The simulation results suggested that the gas control can be applied in the next EAST campaign.

关键词： EASTPCS simserver gas control simulink model socket communication

Network science meets algebraic topology

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National Science Review 2019年第6期6卷 1064-1065页

作者： Lingqing Shen David m.walker michael Small Department of mathematics Nanjing University Department of mathematics & Statistics University of Western Australia mineral Resources Commonwealth Scientific and Industrial Research Organisation

Network science is largely consumed with the study of graphs with heterogeneous degree: typically large graphs with no strong topological symmetry. Network science borrows approaches from statistical physics to understand this heterogeneous structure, in a manner quite distinct from the rich symmetry of the graphs that are studied by algebraic graph theorists. Shi et al. [1] move toward

关键词： Network science meets algebraic topology

Observation of Zitterbewegung in photonic microcavities

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Light(Science & Applications) 2023年第6期12卷 1084-1090页

作者： Seth Lovett Paul m.walker Alexey Osipov Alexey Yulin Pooja Uday Naik Charles E.Whittaker Ivan A.Shelykh maurice S.Skolnick Dmitry N.Krizhanovskii Department of Physics and Astronomy University of SheffieldS37RH SheffieldUK Department of Physics and Technology ITMO UniversitySt.Petersburg 197101Russia Science Institute University of IcelandDunhagi 3IS-107 ReykjavikIceland

We present and experimentally study the effects of the photonic spin–orbit coupling on the real space propagation of polariton wavepackets in planar semiconductor microcavities and polaritonic analogues of *** particular,we demonstrate the appearance of an analogue Zitterbewegung effect,a term which translates as‘trembling motion’in English,which was originally proposed for relativistic Dirac electrons and consisted of the oscillations of the centre of mass of a wavepacket in the direction perpendicular to its *** a planar microcavity,we observe regular Zitterbewegung oscillations whose amplitude and period depend on the wavevector of the *** then extend these results to a honeycomb lattice of coupled microcavity *** to the planar cavity,such lattices are inherently more tuneable and versatile,allowing simulation of the Hamiltonians of a wide range of important physical *** observe an oscillation pattern related to the presence of the spin-split Dirac cones in the *** both cases,the experimentally observed oscillations are in good agreement with theoretical modelling and independently measured bandstructure parameters,providing strong evidence for the observation of Zitterbewegung.

关键词： planar versatile analogues

Spatiotemporal continuum generation in polariton waveguides

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Light(Science & Applications) 2019年第1期8卷 1117-1127页

作者： Paul m.walker Charles E.Whittaker Dmitry V.Skryabin Emiliano Cancellieri Ben Royall maksym Sich Ian Farrer David A.Ritchie maurice S.Skolnick Dmitry N.Krizhanovskii Department of Physics and Astronomy University of SheffieldSheffield S37RHUK Department of Physics University of BathBath BA27AYUK ITmO University Kronverksky Avenue 49St.Petersburg 197101Russia Department of Physics Lancaster UniversityLancaster LA14YBUK Department of Electronic and Electrical Engineering University of SheffieldSheffield S37HQUK Cavendish Laboratory University of CambridgeCambridge CB30HEUK

We demonstrate the generation of a spatiotemporal optical continuum in a highly nonlinear exciton–polariton waveguide using extremely low excitation powers(2-ps,100-W peak power pulses)and a submillimeter device suitable for integrated optics *** observe contributions from several mechanisms over a range of powers and demonstrate that the strong light–matter coupling significantly modifies the physics involved in all of *** experimental data are well understood in combination with theoretical *** results are applicable to a wide range of systems with linear coupling between nonlinear oscillators and particularly to emerging polariton devices that incorporate materials,such as gallium nitride and transition metal dichalcogenide monolayers that exhibit large light–matter coupling at room *** open the door to low-power experimental studies of spatiotemporal nonlinear optics in submillimeter waveguide devices.

关键词： millimeter waveguide optics

Realising the Potential of Genomics for m. tuberculosis: A Silver Lining to the Pandemic?

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China CDC weekly 2022年第20期4卷 437-439页

作者： Timothy m.walker Derrick W Crook Oxford University Clinical Research Unit Ho Chi Minh CityVietnam Nuffield Department of medicine University of Oxford OxfordUK

The impact of the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)pandemic on tuberculosis has been ***,there were 1.4 million fewer patients receiving tuberculosis treatment in 2020,representing not a fall in the global case load but a failure to serve millions of patients with the disease(1–2).morbidity,mortality,and onward transmission are inevitable outcomes of such failure,setting the world back a decade of progress.

关键词： tuberculosis mortality acute

创新行为如何影响政府绩效:以领导干部任前公示为例的研究探索

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兰州大学学报（社会科学版） 2006年第5期34卷 33-40页

作者：吴建南杨宇谦 Richard m.walker 西安交通大学公共政策与管理学陕西西安710061 Cardiff University UK Wales CF10 3XQ

在以往关注不同类型创新行为对组织绩效影响的研究中,组织氛围与沟通、人力资源与管理和行政成本是三类较为常见的影响因素,但三者尚未综合形成统一的框架。本研究选取了领导干部任前公示这一以人力资源管理为内容的创新行为,构建了三... 详细信息

在以往关注不同类型创新行为对组织绩效影响的研究中,组织氛围与沟通、人力资源与管理和行政成本是三类较为常见的影响因素,但三者尚未综合形成统一的框架。本研究选取了领导干部任前公示这一以人力资源管理为内容的创新行为,构建了三因素影响组织绩效的过程假设。通过分析问卷调查数据,发现三因素之间存在显著的相关性,且若按照组织边界划分绩效内容,三因素均与组织的内部成长建设绩效显著相关,而同组织外部绩效水平相关程度较弱。依此认为,创新行为影响绩效是一个由人、财、物三因素互动,并依据创新本身特点内容有所侧重的过程。

关键词：创新行为政府绩效干部任前公示

modelling and Fixed Bed Column Adsorption of Cr(Ⅵ) onto Orthophosphoric Acid-activated Lignin

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Chinese Journal of Chemical Engineering 2012年第3期20卷 469-477页

作者： Ahmad B.Albadarin Chirangano mangwandi Ala'a H.Al-muhtaseb Gavin m.walker Stephen J.Allen mohammad N.m.Ahmad School of Chemistry and Chemical Engineering Queen's University BelfastBelfast BT9 5AGNorthern IrelandUK Petroleum and Chemical Engineering Department Faculty of EngineeringSultan Qaboos UniversityP.O.Box 33Al-KhodOman materials Surface Science Institute Department of Chemical and Environmental SciencesUniversity of LimerickIreland

The advantage of using an available and abundant residual biomass, such as lignin, as a raw material for activated carbons is that it provides additional economical interest to the technical studies. In the current investigation, a more complete understanding of adsorption of Cr（VI） from aqueous systems onto HaPO4-acid activated lignin has been achieved via microcolumns, which were operated under various process conditions. The practice of using microcolumn is appropriate for defining the adsorption parameters and for screening a large number of poten- tial adsorbents. The effects of solution pH （2-8）, initial metal ion concentration （0.483-1.981 mmol.L-1）, flow rate （1.0-3.1 cm3-min-1）, ionic strength （0.01-0.30 mmol-L-1） and adsorbent mass （0.11 0.465 g） on Cr（VI） adsorption were studied by assessing the microcolmnn breakthrough curve. The microcolumn data were fitted by the Thomas model, the modified Dose model and the BDST model. As expected, the adsorption capacity increased with initial Cr（VI） concentration. High linear flow rates, pH values and ionic strength led to early breakthrough of Cr（VI）. The model constants obtained in this study can be used for the design of pilot scale adsorption process.

关键词： activated carbon lignin hexavalent chromium adsorption fixed bed column

Nonlinear forced vibration in a subcritical regime of a porous functionally graded pipe conveying fluid with a retaining clip

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Applied mathematics and mechanics(English Edition) 2025年第1期46卷 101-122页

作者： m.GHOLAmI m.EFTEKHARI Department of mechanical Engineering Shahid Bahonar University of Kerman

This study examines the nonlinear behaviors of a clamped-clamped porous pipe made of a functionally graded material(FGm) that conveys fluids and is equipped with a retaining clip, focusing on primary resonance and subcritical dynamics. The nonlinear governing equations for the FGm pipe are derived by the extended Hamilton's principle, and subsequently discretized through the application of the Galerkin *** direct method of multi-scales is then used to solve the derived equations. A thorough analysis of various parameters, including the clip stiffness, the power-law index, the porosity, and the clip location, is conducted to gain a comprehensive understanding of the system's nonlinear dynamics. Through the analysis of the first natural frequency, the study highlights the influence of the flow velocity and the clip stiffness, while the comparisons with metallic pipes emphasize the role of FGm composition. The examination of the forced response curves reveals saddle-node bifurcations and their dependence on parameters such as the detuning parameter and the power-law index, offering valuable insights into the system's nonlinear resonant behavior. Furthermore, the frequency-response curves illustrate the hardening nonlinearities influenced by factors such as the porosity and the clip stiffness, revealing nuanced effects on the system response and resonance characteristics. This comprehensive analysis enhances the understanding of nonlinear behaviors in FGm porous pipes with a retaining clip, providing key insights for practical engineering applications in system design and optimization.

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