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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

Lymphocytic esophagitis: Still an enigma a decade later

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World Journal of Gastroenterology 2017年第6期23卷 949-956页

作者： Carol Rouphael Ilyssa O gordon Prashanthi N Thota Department of General Internal Medicine Cleveland Clinic Foundation Department of Pathology Cleveland Clinic Foundation Department of Gastroenterology and Hepatology Digestive Disease and Surgery InstituteCleveland Clinic Foundation

Lymphocytic esophagitis (LE) is a clinicopathologic entity first described by Rubio et al in 2006. It is defined as peripapillary intraepithelial lymphocytosis with spongiosis and few or no granulocytes on esophageal biopsy. This definition is not widely accepted and the number of lymphocytes needed to make the diagnosis varied in different studies. Multiple studies have described potential clinical associations and risk factors for LE, such as old age, female gender and smoking history. This entity was reported in inflammatory bowel disease in the pediatric population but not in adults. Other associations include gastroesophageal reflux disease and primary esophageal motility disorders. The most common symptom is dysphagia, with a normal appearing esophagus on endoscopy, though esophageal rings, webs, nodularities, furrows and strictures have been described. Multiple treatment modalities have been used such as proton pump inhibitors and topical steroids. Esophageal dilation seems to be therapeutic when dysphagia is present along with esophageal narrowing secondary to webs, rings or strictures. The natural history of the disease remains unclear and needs to be better delineated. Overall, lymphocytic esophagitis seems to have a chronic and benign course, except for two cases of esophageal perforation in the literature, thought to be secondary to this entity.

关键词： Lymphocytic esophagitis intraepithelial lymphocytes spongiosis gastroesophageal reflux disease CD4 T-cells dysphagia inflammatory bowel disease esophageal rings proton pump inhibitors esophageal dilation

LinkPrimary Longman elect mini phonics lessons. [Primary] 3 / Thomas gordon

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Recent progress in 2D materials for flexible supercapacitors

2009年

作者： gordon thomas

来源：畅想之星图书光盘版（南... 评论

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Journal of Energy Chemistry 2018年第1期27卷 57-72页

作者： Yan Han Yu Ge Yunfeng Chao Caiyun Wang gordon G.Wallace Energy&Materials Engineering Centre College of Physics and Materials Science.Tianjin Normal UniversityTianjin 300387.China ARC Centre of Excellence for Electromaterials Science Intelligent Polymer Research InstituteUniversity of Wollongong.NSW 2500.Australia

High performance supercapacitors coupled with mechanical flexibility are needed to drive flexible and wearable electronics that have anesthetic appeal and multi-functionality. Two dimensional（2D） materials have attracted attention owing to their unique physicochemical and electrochemical properties, in addition to their ability to form hetero-structures with other nanomaterials further improving mechanical and electrochemical properties. After a brief introduction of supercapacitors and 2D materials, recent progress on flexible supercapacitors using 2D materials is reviewed. Here we provide insights into the structure–property relationships of flexible electrodes, in particular free-standing films. We also present our perspectives on the development of flexible supercapacitors.

关键词： 2D materials Flexible supercapacitors Graphene Molybdenum disulfide MXenes

Mixed plastics waste valorization to high-added value products via thermally induced phase separation and spin-casting

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Green Energy & Environment 2024年第10期9卷 1627-1640页

作者： Junaid Saleem Moghal Zubair Khalid Baig Usman Bin Shahid Rafael Luque gordon McKay Division of Sustainable Development College of Science and EngineeringHamad Bin Khalifa UniversityQatar FoundationQatar Center for Advanced Materials Qatar UniversityQatar Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyKowloonHong KongChina Universidad ECOTEC Km 13.5 SamborondonSamborondonEC092302Ecuador

Plastic waste is an underutilized resource that has the potential to be transformed into value-added ***,its chemical diversity leads to cost-intensive sorting techniques,limiting recycling and upcycling ***,we report an open-loop recycling method to produce graded feedstock from mixed polyolefins waste,which makes up 60%of total plastic *** method uses heat flow scanning to quantify the composition of plastic waste and resolves its compatibility through controlled *** resulting feedstock is then used to synthesize blended pellets,porous sorbents,and superhydrophobic coatings via thermally induced phase separation and *** hybrid approach broadens the opportunities for reusing plastic waste,which is a step towards creating a more circular economy and better waste management practices.

关键词： Plastic waste Valorization Superhydrophobic coatings Blended pellets Porous materials Sorbents

Photonic elementary cellular automata for simulation of complex phenomena

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Light(Science & Applications) 2023年第7期12卷 1309-1317页

作者： gordon H.Y.Li Christian R.Leefmans James Williams Alireza Marandi Department of Applied Physics California Institute of TechnologyPasadenaCA91125USA Department of Electrical Engineering California Institute of TechnologyPasadenaCA91125USA

Cellular automata are a class of computational models based on simple rules and algorithms that can simulate a wide range of complex ***,when using conventional computers,these'simple'rules are only encapsulated at the level of *** can be taken one step further by simplifying the underlying physical ***,we propose and implement a simple photonic hardware platform for simulating complex phenomena based on cellular *** this special-purpose computer,we experimentally demonstrate complex phenomena,including fractals,chaos,and solitons,which are typically associated with much more complex physical *** flexibility and programmability of our photonic computer present new opportunities to simulate and harness complexity for effcient,robust,and decentralized information processing using light.

关键词： hardware computer automata

Are yarn quality prediction tools useful in the breeding of high yielding and better fibre quality cotton(Gossypium hirsutum L.)?

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Journal of Cotton Research 2023年第4期6卷 227-239页

作者： LIU Shiming gordon Stuart STILLER Warwick CSIRO Agriculture and Food NarrabriNSW 2390Australia CSIRO Agriculture and Food WerribeeVIC 3030Australia

Results The population had large variations for lint yield,fibre properties,predicted yarn properties,and composite fibre quality *** yield with all fibre quality traits was not *** the selection was conducted first to keep those with improved fibre quality,and followed for high yields,a large proportion in the resultant populations was the same between selections based on Cottonspec predicted yarn quality and HVI-measured fibre *** both exceeded the selection based on FQI and Background The approach of directly testing yarn quality to define fibre quality breeding objectives and progress the selection is attractive but difficult when considering the need for time and *** question remains whether yarn prediction tools from textile research can serve as an *** this study,using a dataset from three seasons of field testing recombinant inbred line population,Cottonspec,a software developed by the Commonwealth Scientific and Industrial Research Organisation(CSIRO)for predicting ring spun yarn quality from fibre properties measured by High Volume Instrument(HVI),was used to select improved fibre quality and lint yield in the *** population was derived from an advanced generation inter-crossing of four CSIRO conventional commercial *** Cottonspec program was able to provide an integrated index of the fibre qualities affecting yarn *** was compared with selection based on HVI-measured fibre properties,and two composite fibre quality variables,namely,fibre quality index(FQI),and premium and discount(PD)*** latter represents the net points of fibre length,strength,and micronaire based on the Premiums and Discounts Schedule used in the market while modified by the inclusion of *** *** The population contained elite segregants with improved yield and fibre properties,and Cottonspec predicted yarn quality is useful to effectively capture these *** is a nee

关键词： Yield Fibre properties Fibre quality index Predictive yarn quality Cotton marketing Cotton breeding

Small bowel adenocarcinoma and Crohn's disease: Any further ahead than 50 years ago?

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World Journal of Gastroenterology 2014年第33期20卷 11486-11495页

作者： Caitlin Cahill Philip H gordon Andrea Petrucci Marylise Boutros McGill University Department of Surgery Sir Mortimer B. Davis Jewish General Hospital Colorectal Surgery Montreal PQ H3T 1E2 Canada

This review of the literature on small bowel carcinoma associated with Crohn's disease specifically addresses the incidence, risk factors, and protective factors which have been identified. It also reviews the clinical presentation, the current modalities of diagnosis, the pathology, treatment, and surveillance. Finally, the prognosis and future direction are addressed. Our experience with small bowel adenocarcinoma in Crohn's disease is reported. Readers will be provided with a better understanding of this rare and often poorly recognized complication of Crohn's disease.

关键词： Crohn's disease Small bowel adenocarcino-ma Cancer risk Cancer malignancy Incidental carcino-ma Late complications of Crohn's disease Inflammatory bowel disease