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230篇 您的检索式:作者名="Andrew Simons"
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1Incidence and mortality of primary liver cancer in England and Wales: Changing patterns and ethnic variations显示文摘AIM: To explore recent trends, modes of diagnosis, ethnic distribution and the mortality to incidence ratio of primary liver cancer by subtypes in England and Wales. METHODS: We obtained incidence(1979-2008) and mortality(1968-2008) data for primary liver cancer for England and Wales and calculated age-standardised incidence and mortality rates. Trends in age-standardised mortality(ASMR) and incidence(ASIR) rates and basis of diagnosis of primary liver cancer and subcategories: hepatocellular carcinoma, intrahepatic bile duct and unspecified liver tumours, were analysed over the study period. Changes in guidelines for the diagnosis of primary liver cancer(PLC) may impact changing trends in the rates that may be obtained. We thus explored changes in the mode of diagnosis as reported to cancer registries. Furthermore, we examined the distribution of these tumours by ethnicity. Most of the statistical manipulations of these data was carried out in Microsoft excel(Seattle, Washington, United Sttaes). Additional epidemiological statistics were done in Epi Info software(Atlanta, GA, United Sttaes). To define patterns of change over time, we evaluated trends in ASMR and ASIR of PLC and intrahepatic bile duct carcinoma(IHBD) using a least squares regression line fitted to the natural logarithm of the mortality and incidence rates. We estimated the patterns of survival over subsequent 5 and 10 years using complement of mortality to incidence ratio(1-MIR). RESULTS: Age-standardised mortality rate of primary liver cancer increased in both sexes: from 2.56 and 1.29/100000 in 1968 to 5.10 and 2.63/100000 in 2008 for men and women respectively. The use of histology for diagnostic confirmation of primary liver cancer increased from 35.7% of registered cases in 1993 to plateau at about 50% during 2005 to 2008. Reliance on cytology as a basis of diagnosis has maintained a downward trend throughout the study period. Although approximately 30% of the PLC registrations had information on ethnicity, there was a relatively higher registration of the major tumour subtypes in patients whose ethnic backgrounds were from high incident regions of the world. Survival from PLC is estimated to get poorer in 10 years(2018) relative to 2008, particularly as a result of IHBD. CONCLUSION: Incidence and mortality of PLC, and particularly IHBD, have continued to rise in England and Wales. Changes in the modes of diagnosis may be contributing.Nimzing G Ladep Shahid A Khan Mary ME Crossey Andrew V Thillainayagam Simon D Taylor-Robinson Mireille B Toledano 2014World Journal of Gastroenterology2014,20,6:15
2Urban and river flooding:Comparison of flood risk management approaches in the UK and China and an assessment of future knowledge needs显示文摘Increased urbanisation,economic growth,and long-term climate variability have made both the UK and China more susceptible to urban and river flooding,putting people and property at increased risk.This paper presents a review of the current flooding challenges that are affecting the UK and China and the actions that each country is undertaking to tackle these problems.Particular emphases in this paper are laid on(1)learning from previous flooding events in the UK and China,and(2)which management methodologies are commonly used to reduce flood risk.The paper concludes with a strategic research plan suggested by the authors,together with proposed ways to overcome identified knowledge gaps in flood management.Recommendations briefly comprise the engagement of all stakeholders to ensure a proactive approach to land use planning,early warning systems,and water-sensitive urban design or redesign through more effective policy,multi-level flood models,and data driven models of water quantity and quality.Matteo Rubinato Andrew Nichols Yong Peng Jian-min Zhang Craig Lashford Yan-peng Cai Peng-zhi Lin Simon Tait 2019Water Science and Engineering2019,12,4:6
3Inferring the Tree of Life of the order Cypriniformes, the earth's most diverse clade of freshwater fishes: Implications of varied taxon and character sampling显示文摘The phylogenetic relationships of species are fundamental to any biological investigation, including all evolutionary studies. Accurate inferences of sister group relationships provide the researcher with an historical framework within which the attributes or geographic origin of species (or supraspecific groups) evolved. Taken out of this phylogenetic context, interpretations of evolutionary processes or origins, geographic distributions, or speciation rates and mechanisms, are subject to nothing less than a biological experiment without controls. Cypriniformes is the most diverse clade of freshwater fishes with estimates of diversity of nearly 3,500 species. These fishes display an amazing array of morphological, ecological, behavioral, and geographic diversity and offer a tremendous opportunity to enhance our understanding of the biotic and abiotic factors associated with diversification and adaptation to environments. Given the nearly global distribution of these fishes, they serve as an important model group for a plethora of biological investigations, including indicator species for future cli-matic changes. The occurrence of the zebrafish, Danio rerio, in this order makes this clade a critical component in understanding and predicting the relationship between mutagenesis and phenotypic expressions in vertebrates, including humans. With the tremendous diversity in Cypriniformes, our understanding of their phylogenetic relationships has not proceeded at an acceptable rate, despite a plethora of morphological and more recent mo-lecular studies. Most studies are pre-Hennigian in origin or include relatively small numbers of taxa. Given that analyses of small numbers of taxa for molecular characters can be compromised by peculiarities of long-branch attraction and nodal-density effect, it is critical that significant progress in our understanding of the relationships of these important fishes occurs with increasing sampling of species to mitigate these potential problems. The recent Cypriniformes Tree of Life initiative is an effort to achieve this goal with morphological and molecular (mitochondrial and nuclear) data. In this early synthesis of our understanding of the phylogenetic relationships of these fishes, all types of data have contributed historically to improving our understanding, but not all analyses are complementary in taxon sampling, thus precluding direct understanding of the impact of taxon sampling on achieving accurate phylogenetic inferences. However, recent molecular studies do provide some insight and in some instances taxon sampling can be implicated as a variable that can influence sister group relationships. Other instances may also exist but without inclusion of more taxa for both mitochondrial and nuclear genes, one cannot distinguish between inferences being dictated by taxon sampling or the origins of the molecular data.Richard L. MAYDEN Kevin L. TANG Robert M. WOOD Wei-Jen CHEN Mary K. AGNEW Kevin W. CONWAY Lei YANG Andrew M. SIMONS Henry L. BART Phillip M. HARRIS Junbing LI Xuzhen WANG Kenji SAITOH Shunping HE Huanzhang LIU Yiyu CHEN Mutstmi NISHIDA Masaki MIYA 2008植物分类学报2008,46,3:5
4牧草细胞壁:瘤胃内降解(英文)显示文摘牧草细胞壁在瘤胃内降解主要是瘤胃微生物起作用。本综述概略地介绍了牧草细胞壁降解所涉及的以细菌为主的微生物,细胞壁多糖分解所需的酶,细胞壁降解模型以及细胞壁降解的限制因素。孙学钊 Simone O. Hoskin Keith N. Joblin Ian G. Andrew Philip J. Harris 盛亦兵 2007草地学报2007,15,4:5
5A deep convolutional neural network for real-time full profile analysis of big powder diffraction data显示文摘We present Parameter Quantification Network(PQ-Net),a regression deep convolutional neural network providing quantitative analysis of powder X-ray diffraction patterns from multi-phase systems.The network is tested against simulated and experimental datasets of increasing complexity with the last one being an X-ray diffraction computed tomography dataset of a multi-phase Ni-Pd/CeO_(2)-ZrO_(2)/Al_(2)O_(3) catalytic material system consisting of ca.20,000 diffraction patterns.It is shown that the network predicts accurate scale factor,lattice parameter and crystallite size maps for all phases,which are comparable to those obtained through full profile analysis using the Rietveld method,also providing a reliable uncertainty measure on the results.The main advantage of PQNet is its ability to yield these results orders of magnitude faster showing its potential as a tool for real-time diffraction data analysis during in situ/operando experiments.Hongyang Dong Keith T.Butler Dorota Matras Stephen W.T.Price Yaroslav Odarchenko Rahul Khatry Andrew Thompson Vesna Middelkoop Simon D.M.Jacques Andrew M.Beale Antonis Vamvakeros 2021npj Computational Materials2021,,1:5
6A history of high-power laser research and development in the United Kingdom显示文摘The first demonstration of laser action in ruby was made in 1960 by T.H.Maiman of Hughes Research Laboratories,USA.Many laboratories worldwide began the search for lasers using different materials,operating at different wavelengths.In the UK,academia,industry and the central laboratories took up the challenge from the earliest days to develop these systems for a broad range of applications.This historical review looks at the contribution the UK has made to the advancement of the technology,the development of systems and components and their exploitation over the last 60 years.Colin N.Danson Malcolm White John R.M.Barr Thomas Bett Peter Blyth David Bowley Ceri Brenner Robert J.Collins Neal Croxford A.E.Bucker Dangor Laurence Devereux Peter E.Dyer Anthony Dymoke-Bradshaw Christopher B.Edwards Paul Ewart Allister I.Ferguson John M.Girkin Denis R.Hall David C.Hanna Wayne Harris David I.Hillier Christopher J.Hooker Simon M.Hooker Nicholas Hopps Janet Hull David Hunt Dino A.Jaroszynski Mark Kempenaars Helmut Kessler Sir Peter L.Knight Steve Knight Adrian Knowles Ciaran L.S.Lewis Ken S.Lipton Abby Littlechild John Littlechild Peter Maggs Graeme P.A.Malcolm OBE Stuart P.D.Mangles William Martin Paul McKenna Richard O.Moore Clive Morrison Zulfikar Najmudin David Neely Geoff H.C.New Michael J.Norman Ted Paine Anthony W.Parker Rory R.Penman Geoff J.Pert Chris Pietraszewski Andrew Randewich Nadeem H.Rizvi Nigel Seddon MBE Zheng-Ming Sheng David Slater Roland A.Smith Christopher Spindloe Roy Taylor Gary Thomas John W.G.Tisch Justin S.Wark Colin Webb S.Mark Wiggins Dave Willford Trevor Winstone 2021High Power Laser Science and Engineering2021,9,2:5
7Successful surgical management of ruptured umbilical hernias in cirrhotic patients显示文摘Acute umbilical hernia rupture in patients with hepatic cirrhosis and ascites is an unusual,but potentially lifethreatening complication,with postoperative morbidity about 70% and mortality between 60%-80% after supportive care and 6%-20% after urgent surgical repair.Management options include primary surgical repair with or without concomitant portal venous system decompression for the control of the ascites.We present a retrospective analysis of our centre's experience over the last 6 years.Our cohort consisted of 11 consecutive patients(median age:53 years,range:36-63 years) with advanced hepatic cirrhosis and refractory ascites.Appropriate patient resuscitation and optimisation with intravenous fluids,prophylactic antibiotics and local measures was instituted.One failed attempt for conservative management was followed by a successful primary repair.In all cases,with one exception,a primary repair with non-absorbable Nylon,interrupted sutures,without mesh,was performed.The perioperative complication rate was 25% and the recurrence rate 8.3%.No mortality was recorded.Median length of hospital stay was 14 d(range:4-31 d).Based on our experience,the management of ruptured umbilical hernias in patients with advanced hepatic cirrhosis and refractory ascites is feasible without the use of transjugular intrahepatic portosystemic shunt routinely in the preoperative period,provided that meticulous patient optimisation is performed.Nikolaos A Chatzizacharias J Andrew Bradley Simon Harper Andrew Butler Asif Jah Emmanuel Huguet Raaj K Praseedom Michael Allison Paul Gibbs 2015World Journal of Gastroenterology2015,21,10:4
8Invasion genetics: Lessons from a ubiquitous bird, the house sparrow Passer domesticus显示文摘Andrea L. LIEBL Aaron W. SCHREY Samuel C. ANDREW Elizabeth L.SHELDON Simon C. GRIFFITH 2015Current Zoology2015,61,3:4
9知证卫生决策工具之一--什么是知证决策显示文摘本文讨论以下3个问题:①什么是证据?②研究证据在知证卫生决策中有何作用?③什么是知证决策?知证卫生决策是一种决策方法,旨在保证基于最佳可及的研究证据做出决策。知证决策的特点是将系统、透明地获取和评价证据的方法引入决策全过程。虽不要求制定政策的整个过程系统和透明,但在制定政策的全过程,采用系统的步骤可以确保合理地查找、评价和使用相关研究。过程透明化旨在确保他人可以检查什么样的研究证据被用于支持决策并评价证据及其意义。知证决策帮助政策制定者了解这些过程。Andrew D Oxman John N Lavis Simon Lewin Atle Fretheim 李媛媛 蒋兰慧 王莉 李幼平 2010中国循证医学杂志2010,10,3:4
10Imaging of liver cancer显示文摘Improvements in imaging technology allow exploitation of the dual blood supply of the liver to aid in the identif ication and characterisation of both malignant and benign liver lesions. Imaging techniques available include contrast enhanced ultrasound, computed tomography and magnetic resonance imaging. This review discusses the application of several imaging techniques in the diagnosis and staging of both hepatocellular carcinoma and cholangiocarcinoma and outlines certain characteristics of benign liver lesions. The advantages of each imaging technique are highlighted, while underscoring the potential pitfalls and limitations of each imaging modality.Ben Ariff Claire R Lloyd Sameer Khan Mohamed Shariff Andrew V Thillainayagam Devinder S Bansi Shahid A Khan Simon D Taylor-Robinson Adrian KP Lim 2009World Journal of Gastroenterology2009,15,11:4
11Differential expression of the CCN family member WISP-1, WISP-2 andWISP-3 in human colorectal cancer and the prognostic implications显示文摘Simon Davies Mansel Davies Andrew Sanders Chris Parr Jared Torkington Wen Jiang 2010International Journal of Oncology2010,,5:3
12Double Balloon Enteroscopy Detects Small Bowel Mass Lesions Missed by Capsule Endoscopy显示文摘Andrew Ross Shahab Mehdizadeh Jeffrey Tokar Jonathan A. Leighton Ahmad Kamal Ann Chen Drew Schembre Gary Chen Kenneth Binmoeller Richard Kozarek Irving Waxman Charles Dye Lauren Gerson M. Edwyn Harrison Oleh Haluszka Simon Lo Carol Semrad 2008Digestive Diseases and Sciences2008,,8:2
13What is the learning curve associated with double-balloon enteroscopy? Technical details and early experience in 6 U.S. tertiary care centers <ce:link locator='fx1'/>显示文摘Shahab Mehdizadeh Andrew Ross Lauren Gerson Jonathan Leighton Ann Chen Drew Schembre Gary Chen Carol Semrad Ahmad Kamal Edwyn M. Harrison Kenneth Binmoeller Irving Waxman Richard Kozarek Simon K. Lo 2006Gastrointestinal Endoscopy2006,,5:2
14知证卫生决策工具--导论显示文摘了解如何查找和使用研究证据可以帮助政策制定者及其决策支持者们更优质高效地工作。本系列的每篇文章各推荐一种方法,政策制定者及其决策支持者们可采用这些方法查找和使用证据进行知证卫生决策。本系列文章涉及四个宽泛领域:①支持知证决策;②确定政策制定三个阶段的证据需求,这三个阶段包括:明确问题、拟订方案和制订实施计划;③寻找并评价这三阶段所需证据,包括系统评价和其它类型证据;④根据研究证据进行决策。每篇文章都由1~3个与主题相关的案例情景引出,用于帮助读者在使用SUPPORT工具时判断自己所属的情况。本系列绝大部分文章都以结构化提出系列问题的方式,引导读者了解推荐工具,并展示如何采取措施更优质高效地支持知证决策。这些措施包括:利用研究证据明确问题;评价针对该问题所选系统评价中结果的适用性;组织和开展政策对话以支持知证决策;制定政策监测和评估计划。部分文章所提出的问题对如何支持知证决策提供了更通用的指导,每篇文章后面还附有其他相关信息资源。评估支持知证卫生决策方法是一个正在发展的领域,欢迎读者对怎样改进本系列文章提供反馈信息。John N Lavis Andrew D Oxman Simon Lewin Atle Fretheim 沈建通 蒋兰慧 王莉 李幼平 2010中国循证医学杂志2010,10,3:2
15Alternative treatments to inhibit VEGF in age-related choroidal neovascularisation: 2-year findings of the IVAN randomised controlled trial显示文摘Usha Chakravarthy Simon P Harding Chris A Rogers Susan M Downes Andrew J Lotery Lucy A Culliford Barnaby C Reeves 2013The Lancet2013,,:2
16Differential Targeting of Prosurvival Bcl-2 Proteins by Their BH3-Only Ligands Allows Complementary Apoptotic Function显示文摘Lin Chen Simon N. Willis Andrew Wei Brian J. Smith Jamie I. Fletcher Mark G. Hinds Peter M. Colman Catherine L. Day Jerry M. Adams David C.S. Huang 2005Molecular Cell2005,,3:2
17知证卫生决策工具之三--设定优先顺序支持知证决策显示文摘决策者开展或支持知证决策与项目的资源有限。所需资源包括员工的工作时间、员工开展工作的基础设施(如电子图书馆的使用权限或购买期刊文章)和不断更新专业知识。决策者们也许更愿意将这样的工作承包给具备恰当技能和设施的独立机构,但决策者的资金有限。不管为知证决策提供的支持来自外部还是内部,是集中还是分散,资源都需要合理最大化利用。不恰当设定优先次序的例子包括:①采取逐个评价个案的方式支持知证决策制定时间进度表,而不是为每一个时间进度表提供明确规范的支持力度;②优先次序设定的标准含糊不清;尤其设定优先次序的过程不清楚或不系统不准确;③无交流和监测评价计划。本文提出用于指导在查找和使用研究证据支持知证决策的过程中如何设定优先次序的问题,包括:①设定优先次序的方法可否明确地为以不同方式解决最优先问题制定时间表?②该方法是否采用了设定优先次序的清晰标准?③该方法是否采用了设定优先次序的清晰流程?④该方法是否采用了交流策略和监测与评估计划?John N Lavis Andrew D Oxman Simon Lewin Atle Fretheim 袁强 陈群飞 蒋兰慧 王莉 李幼平 2010中国循证医学杂志2010,10,3:2
18知证卫生决策工具之十一--查找和使用当地证据显示文摘当地证据是指来源于卫生政策或卫生项目所涉及的特定环境的证据。需要这类证据与其它形式的证据共同支持方案决择。全球证据是判断政策效果及其影响因素和深入了解问题解决办法的最佳出发点。而当地证据大多数是在判断应采纳哪些决定及采取哪些措施时使用。本文提出以下5个问题供政策制定者在识别和评价当地证据进行知证决策时参考:①知证决策需要什么样的当地证据?②如何获得必需的当地证据?③如何评价现有当地证据的质量?④当地证据的可获得性、质量或结果是否有重要变化?⑤如何整合当地证据与其他信息?Simon Lewin Andrew D Oxman John N Lavis Atle Fretheim Sebastian Garcia Marti Susan Munabi-Babigumira 李幼平 王莉 成岚 蒋兰慧 蔡羽嘉 2010中国循证医学杂志2010,10,4:2
19知证卫生决策工具之十三--准备和使用政策简报支持知证决策显示文摘政策简报是一个相对较新的为决策者打包研究证据的方法。政策简报的第一步就是设定政策问题的优先顺序,然后收集与问题各种特征相关的各方面研究证据。利用可得到的系统评价可使收集证据的过程可行且合理;若无系统评价,可查找单个相关研究并根据需考虑问题的特征合并单个研究。本文提供以下问题供准备和使用政策简报支持知证决策者参考:①该政策简报是否解决一个高度优先问题,并描述了该问题的相关背景?②该政策简报是否描述了用于解决该问题各方案的问题、成本和效果及实施时需考虑的关键问题?③该政策简报是否用系统、透明的方法查找、筛选及评价合成的研究证据?④在讨论合成的研究证据时,该政策简报是否考虑了证据的质量、当地适用性及公平性?⑤该政策简报是否使用分级进入格式?⑥是否对该政策简报的科学质量和系统相关性进行了评价?John N Lavis Govin Permanand Andrew D Oxman Simon Lewin Atle Fretheim 李幼平 李玲 蒋兰慧 文进 2010中国循证医学杂志2010,10,5:2
20Ranibizumab versus Bevacizumab to Treat Neovascular Age-related Macular Degeneration显示文摘Usha Chakravarthy Simon P. Harding Chris A. Rogers Susan M. Downes Andrew J. Lotery Sarah Wordsworth Barnaby C. Reeves 2012Ophthalmology2012,,7:2
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