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International Journal of Disaster Risk Science 2019年第4期10卷 462-477页

作者： Henry Ngenyam Bang Lee Stuart Miles Richard Duncan gordon Disaster Management Centre Bournemouth UniversityDorsetTalbot CampusFern BarrowPoole BH125BBUK

Many African countries are prone to numerous hazardous events,exacerbated by the vulnerability of their rapidly increasing population and leading to frequent disasters that often have dire fiscal and development ***,there is declining sensitivity to these risks,contrary to the conventional wisdom of disaster management(DM)*** primary aim of this research is to understand the constraints and/or challenges limiting the ability of contemporary African DM systems/institutional frameworks from implementing adequate disaster risk reduction(DRR)*** a qualitative,case study based research strategy,this research investigates resistance to the effective implementation of DM/DRR within Cameroon’s contemporary DM system by using the Sendai Framework for Disaster Risk Reduction 2015–2030 guiding principles for DRR as *** findings reveal the existence of resistance factors that particularly complicate the communication,decision making,and coordination of DRR activities,the provision of resources,aspects of international assistance,as well as DRR planning and *** authors argue that such resistance factors contribute to making Cameroon’s DM system more reactive and further undermine risk *** article concludes by offering key recommendations that have the potential to alleviate the identified resistance factors as well as strengthen Cameroon’s DM,particularly in relation to capacity building,training,research development,and organizational resilience.

关键词： Cameroon Communication resistance Disaster management Disaster management system Disaster risk reduction West Africa

Remote photobiomodulation: an emerging strategy for neuroprotection

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Neural Regeneration Research 2019年第12期14卷 2086-2087页

作者： Luke C. gordon Daniel M. Johnstone Bosch Institute University of Sydney NSW AustraliaDiscipline of Physiology University of Sydney NSW Australia

Photobiomodulation (PBM)- the irradiation of cells or tissues with low-intensity red to near-infrared light - is emerging as an effective means of enhancing cell and tissue resilience and repair. As reviewed elsewhere (gordon et al., 2019), the intracellular effects of PBM appear to be primarily mediated by cytochrome C oxidase, a key enzyme in the mitochondrial respiratory chain and a primary photoacceptor of red to near-infrared light. Absorption of light by cytochrome C oxidase alters its redox state, resulting in increased ATP production, the liberation of nitric oxide and a transient burst in reactive oxygen species.

关键词： Remote photobiomodulation neuroprotection irradiation

Simulations of granular flow along an inclined plane using the Savage-Hutter model

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Particuology 2012年第2期10卷 236-241页

作者： Minglong Fei Qicheng Sun Deyu Zhong gordon G.D.Zhou State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing 100084China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China

In this work a velocity-dependent friction is introduced into a depth-averaged 5avage-Hutter dynamical model for shallow granular flows. The process of granular material flowing along an inclined plane and then depositing on a horizontal plane is simulated. The surface profiles and evolution of various types of energy are investigated and compared when using the standard Coulomb-type friction versus velocity- dependent friction. Interestingly, there is a small difference between the two different types of friction.

关键词： Granular flowsDynamics frictionSavage-Flutter model

SmallSat swarm gravimetry:Revealing the interior structure of asteroids and comets

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Astrodynamics 2021年第3期5卷 217-236页

作者： William gordon Ledbetter Rohan Sood James Keane Jeffrey Stuart Astrodynamics and Space Research Laboratory The University of AlabamaTuscaloosaAL 35487USA Jet Propulsion Laboratory California Institute of TechnologyPasadenaCA 91109USA

A growing interest in small body exploration has motivated research into the rapid char-acterization of near-Earth objects to meet economic or scientific ***,knowledge of the internal density structure can aid with target selection and enables an understanding of prehistoric planetary formation to be *** this end,multi-layer extensions to the polyhedral gravity model are suggested,and an inversion technique is implemented to present their ***-orbit gravity gradiometry is simulated and employed in stochastic and deterministic algorithms,with results that imply robustness in both cases.

关键词： gravimetry asteroid exploration astrodynamics stochastic optimization

Primary Longman elect mini phonics lessons. [Primary] 2 / Thomas gordon.

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A Compact High Order Space-Time Method for Conservation Laws

2009年

作者： gordon thomas

来源：畅想之星图书光盘版（南... 评论

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Communications in Computational Physics 2011年第2期9卷 441-480页

作者： Shuangzhang Tu gordon W.Skelton Qing Pang Department of Computer Engineering Jackson State UniversityJacksonMS 39217USA

This paper presents a novel high-order space-time method for hyperbolic conservation *** important concepts,the staggered space-time mesh of the space-time conservation element/solution element(CE/SE)method and the local discontinuous basis functions of the space-time discontinuous Galerkin(DG)finite element method,are the two key ingredients of the new *** staggered spacetime mesh is constructed using the cell-vertex structure of the underlying spatial *** universal definitions of CEs and SEs are independent of the underlying spatial mesh and thus suitable for arbitrarily unstructured *** solution within each physical time step is updated alternately at the cell level and the vertex *** this solution updating strategy and the DG ingredient,the new scheme here is termed as the discontinuous Galerkin cell-vertex scheme(DG-CVS).The high order of accuracy is achieved by employing high-order Taylor polynomials as the basis functions inside each *** present DG-CVS exhibits many advantageous features such as Riemann-solver-free,high-order accuracy,point-implicitness,compactness,and ease of handling boundary *** numerical tests including the scalar advection equations and compressible Euler equations will demonstrate the performance of the new method.

关键词： High order method space-time method cell-vertex scheme(CVS) conservation laws

Joint hard X-ray observations with ASO-S/HXI and SO/STIX

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Research in Astronomy and Astrophysics 2019年第11期19卷 127-130页

作者： Sam Krucker gordon JHurford Yang Su Wei-Qun Gan University of Applied Sciences and Arts Northwestern Switzerland Bahnhofstrasse 65210WindischSwitzerland Space Science Laboratory University of California7 Gauss Way94720 BerkeleyUSA Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210034China

This paper discusses the potential of future joint hard X-ray solar flare observations between the Hard X-ray Imager(HXI)onboard the Advanced Space-based Solar Observatory(ASO-S)mission and the Spectrometer/Telescope for Imaging X-rays(STIX)on Solar *** different viewing perspectives of the two telescopes relative to the Sun will allow us for the first time to systematically study non-thermal hard X-ray emissions *** the 4-years of the nominal mission of ASO-S,we expect to jointly observe about 160 flares above GOES M1 class to systematically study hard X-ray *** about 16 partially limb-occulted STIX flares,we will have observations of the entire flare by *** observations will enable us to simultaneously study the all-important coronal hard X-ray sources,which are generally lost in the instrument’s individual imaging dynamic range,in combination with the chromospheric footpoint *** two different detector systems used in the two telescopes make the relative calibration between the two instruments a key task that needs to be addressed before creditable science results can be *** an accurate inter-calibration can be achieved using jointly observed flares on the disk,observations with HXI and STIX will provide new and essential key diagnostics for solar flare physics.

关键词： Sun flares

Extension of the High-Order Space-Time Discontinuous Galerkin Cell Vertex Scheme to Solve Time Dependent Diffusion Equations

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Communications in Computational Physics 2012年第5期11卷 1503-1524页

作者： Shuangzhang Tu gordon W.Skelton Qing Pang Department of Computer Engineering Jackson State UniversityJacksonMS 39217USA

In this paper,the high-order space-time discontinuous Galerkin cell vertex scheme(DG-CVS)developed by the authors for hyperbolic conservation laws is extended for time dependent diffusion *** the extension,the treatment of the diffusive flux is exactly the same as that for the advective *** to the Riemannsolver-free and reconstruction-free features of DG-CVS,both the advective flux and the diffusive flux are evaluated using continuous information across the cell *** a result,the resulting formulation with diffusive fluxes present is still consistent and does not need any extra ad hoc techniques to cure the common“variational crime”problem when traditional DG methods are applied to diffusion *** this reason,DG-CVS is conceptually simpler than other existing DG-typed *** numerical tests demonstrate that the convergence order based on the L_(2)-norm is optimal,i.e.O(h^(p+1))for the solution and O(h^(p))for the solution gradients,when the basis polynomials are of odd *** even-degree polynomials,the convergence order is sub-optimal for the solution and optimal for the solution *** same odd-even behaviour can also be seen in some other DG-typed methods.

关键词： High-order method space-time method discontinuous Galerkin(DG)method cellvertex scheme(CVS) diffusion equations

Minimum sample size estimates for trials in inflammatory bowel disease:A systematic review of a support resource

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World Journal of Gastroenterology 2021年第43期27卷 7572-7581页

作者： Morris gordon Svetlana Lakunina Vasiliki Sinopoulou Anthony Akobeng Biomedical Evidence Synthesis and Translation to Practice Unit School of MedicinePreston PR17BHUnited Kingdom Division of Gastroenterology Sidra Med and Res CtrDoha 26999Qatar

BACKGROUND Of 25%of randomised controlled trials(RCTs)on interventions for inflammatory bowel disease(IBD)have no power *** To systematically review RCTs reporting interventions for the management of IBD and to produce data for minimum sample sizes that would achieve appropriate power using the actual clinical *** We included RCTs retrieved from Cochrane IBD specialised Trial register and CENTRAL investigating any form of therapy for either induction or maintenance of remission against control,placebo,or no intervention of IBD in patients of any *** relevant data was extracted,and the studies were grouped according to the intervention *** recalculated sample size and the achieved difference,as well as minimum sample sizes needed in the *** A total of 105 trials were *** was a large discrepancy between the estimated figure for the minimal clinically important difference used for the calculations(15%group differences observed vs 30%used for calculation)explaining substantial actual sample size *** minimum sample sizes indicated for future trials based on the 25 years of trial data were calculated and grouped by the *** A third of intervention studies in IBD within the last 25 years are underpowered,with large variations in the calculation of sample *** authors present a sample size estimate resource constructed on the published evidence base for future researchers and key stakeholders within the IBD trial field.

关键词： Inflammatory bowel disease Crohn’s disease Ulcerative colitis Gastroenterology Statistics Sample size

Analysing the power transformer temperature limitation for avoidance of bubble formation

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High Voltage 2019年第3期4卷 210-216页

作者： James Hill Zhongdong Wang Qiang Liu Christoph Krause gordon Wilson The University of Manchester ManchesterM139PLUK Weidmann Electrical Technology AG Rapperswil-JonaCH 8640Switzerland National Grid WarwickCV346DAUK

Failure of a transformer is a costly incident which can impact power system operation and result in loss of supply to *** can fail through a number of mechanisms,one of which is from the formation of bubbles within the ***,the loading guidance is set to avoid certain overload temperatures as high temperature is the main cause of bubbles *** paper analyses the limit set within the loading guides,comparing the most commonly cited temperature limit of 140℃ with values taken from across the full spectra of available studies in *** is concluded that there is sufficient evidence for further investigation into formation of bubbles from transformer insulation as employing a single temperature limit may be *** of a single temperature value is unsuitable,given the wide range of potential scenarios that the transformer fleet can *** has become the go-to rationale that the moisture content of the solid insulation is the key driver for transformer bubbling *** is true,however,it is shown that other factors such as solid insulation aged condition(determined through degree of polymerisation value)and the insulation type are also important considerations.

关键词： insulation limit power