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113篇 您的检索式:作者名="David Marshall"
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1Microscopic colitis: A review of etiology, treatment and refractory disease显示文摘Microscopic colitis is a common cause of chronic,nonbloody diarrhea. Microscopic colitis is more common in women than men and usually affects patients in their sixth and seventh decade. This article reviews the etiology and medical management of microscopic colitis. The etiology of microscopic colitis is unknown, but it is associated with autoimmune disorders, such as celiac disease, polyarthritis, and thyroid disorders. Smoking has been identified as a risk factor of mi-croscopic colitis. Exposure to medications, such as non-steroidal anti-inflammatory drugs, proton pump inhibitors, and selective serotonin reuptake inhibitors, is suspected to play a role in microscopic colitis, although their direct causal relationship has not been proven. Multiple medications, including corticosteroids, anti-diarrheals, cholestyramine, bismuth, 5-aminosalicylates, and immunomodulators, have been used to treat microscopic colitis with variable response rates. Budesonide is effective in inducing and maintaining clinical remission but relapse rate is as high as 82% when budesonide is discontinued. There is limited data on management of steroid-dependent microscopic colitis or refractory microscopic colitis. Immunomodulators seem to have low response rate 0%-56% for patients with refractory microscopic colitis. Response rate 66%-100% was observed for use of anti-tumor necrosis factor(TNF) therapy for refractory microscopic colitis. Anti-TNF and diverting ileostomy may be an option in severe or refractory microscopic colitis.Tina Park David Cave Christopher Marshall 2015World Journal of Gastroenterology2015,21,29:9
2Clinical diagnosis of Alzheimer?s disease: Report of the NINCDS-ADRDA Work Group* under the auspices of Department of Health and Human Services Task Force on Alzheimer?s Disease显示文摘Guy McKhann David Drachman Marshall Folstein Robert Katzman Donald Price Emanuel M. Stadlan 1984Neurology1984,,7:7
3Impacts of El Nino-Southern Oscillation events on China's rice production显示文摘This paper aims to demonstrate the relationships between ENSO and rice production of Jiangxi province in order to identify the reason that ENSO might have little effect on Chinese rice production. Using a data set with measures of Jiangxi's climate and rice production,we find the reason that during 1985 and 2004 ENSO's well correlated with rainfall did not promote Chinese rice production. First,the largest effects of ENSO mostly occur in the months when there is no rice in the field. Second,there is almost no temperature effect. Finally,the monthly distribution of rainfall is almost the same in ENSO and neutral years because the largest effects are during months when there is the least rain. In addition,due to the high irrigation share and reliable and effective irrigation facilities of cultivated land,China's rice production is less climate-sensitive.DENG Xiangzheng HUANG Jikun QIAO Fangbin Rosamond L. Naylor Walter P. Falcon Marshall Burke Scott Rozelle David Battisti 2010Journal of Geographical Sciences2010,20,1:7
4A 3D morphometric perspective for facial gender analysis and classification using geodesic path curvature features显示文摘The relationship between the shape and gender of a face, with particular application to automatic gender classification, has been the subject of significant research in recent years. Determining the gender of a face, especially when dealing with unseen examples, presents a major challenge. This is especially true for certain age groups, such as teenagers, due to their rapid development at this phase of life. This study proposes a new set of facial morphological descriptors,based on 3D geodesic path curvatures, and uses them for gender analysis. Their goal is to discern key facial areas related to gender, specifically suited to the task of gender classification. These new curvature-based features are extracted along the geodesic path between two biological landmarks located in key facial areas.Classification performance based on the new features is compared with that achieved using the Euclidean and geodesic distance measures traditionally used in gender analysis and classification. Five different experiments were conducted on a large teenage face database(4745 faces from the Avon Longitudinal Study of Parents and Children) to investigate and justify the use of the proposed curvature features. Our experiments show that the combination of the new features with geodesic distances provides a classification accuracy of 89%. They also show that nose-related traits provide the most discriminative facial feature for gender classification, with the most discriminative features lying along the 3D face profile curve.Hawraa Abbas Yulia Hicks David Marshall Alexei I.Zhurov StephenRichmond 2018Computational Visual Media2018,4,1:5
5《Science》杂志发表关于计算社会科学的文章:Computational Social Science显示文摘计算科学是一门正在兴起的综合性学科,它依赖于先进的计算机及计算技术对理论科学、大型实验、观测数据、应用科学、国防以及社会科学进行模型化、模拟与仿真、计算等。特别是对极复杂系统进行模型与程序化,然后利用计算机给出严格理论及实验无法达到的过程数据或者直接模拟出整个复杂过程的演变或者预测过程的发展趋势。对基础科学、应用科学、国防科学、社会科学以及工程技术等的发展有着不可估量的科学作用与经济效益。其中,随着信息化和网络化的不断普及与深入,社会动态变化的速度和规模已经提高到一个前所未有的水平,计算科学在社会科学中的深入应用,即计算社会科学也将成为科研信息化发展中一个新的热点。本刊对《Science》2009年2月发表的一篇关于计算社会科学的文章《Computational Social Science》进行了摘编,该文由美国多个大学及研究机构的共15名研究人员共同编写,文章从计算社会科学的数据获取、研究方法及其制约因素,以及人才的培养等几个方面,描述了计算社会科学的发展、讨论了社会科学研究的特点等。其主要目的是想借此文向广大读者介绍计算社会科学这一学科理念,推动这一对于提高社会科学研究水平和规范性的研究方法在国内的发展,并以此进一步繁荣我国社会科学研究工作。张鉴 孔丽华 David Lazer Alex Pentland Lada Adamic Sinan Aral Albert-László Barabási Devon Brewer Nicholas Christakis Noshir Contractor James Fowler Myron Gutmann Tony Jebara Gary King Michael Macy Deb Roy Marshall Van Alstyne 2010科研信息化技术与应用2010,0,2:5
6Decreased Levels of Plasma Vitamin C and Increased Concentrations of Inflammatory and Oxidative Stress Markers After Stroke显示文摘Concepción Sánchez-Moreno John F. Dashe Tammy Scott David Thaler Marshal F. Folstein Antonio Martin 2004Stroke: Journal of the American Heart Association2004,,1:4
7Fundamental behaviours of production traffic in underground mine haulage ramps显示文摘Ramps(or declines) are often used in underground mines to transport ore, waste, materials, and personnel. This paper studies mine ramp productivity and presents results from a set of computer simulations designed to model the fundamental behaviours of ramp haulage systems. Simulations show that, under fundamental assumptions without random disturbances, the haulage system always converges to a periodic behaviour in the steady state, but that productivities vary between equilibria. Simulations also demonstrate how productivity per vehicle does not necessarily decrease as more vehicles are added and,for example, in the five-vehicle case, how a 3.1% improvement can be achieved over the use of four vehicles. The result reveals the inefficiency of commonly-used lockout-style vehicle coordination strategies,and suggests a possible avenue for improving the productivity of haulage ramps by controlling the system to achieve more productive behaviours.Haviland David Marshall Joshua 2015International Journal of Mining Science and Technology2015,25,1:4
8Quality in the technical performance of colonoscopy and the continuous quality improvement process for colonoscopy: recommendations of the U.S. Multi-Society Task Force on Colorectal Cancer显示文摘Douglas K Rex John H Bond Sidney Winawer Theodore R Levin Randall W Burt David A Johnson Lynne M Kirk Scott Litlin David A Lieberman Jerome D Waye James Church John B Marshall Robert H Riddell 2002The American Journal of Gastroenterology2002,,6:3
9Fecal Microbiota Transplantation Induces Remission in Patients With Active Ulcerative Colitis in a Randomized Controlled Trial显示文摘Paul Moayyedi Michael G. Surette Peter T. Kim Josie Libertucci Melanie Wolfe Catherine Onischi David Armstrong John K. Marshall Zain Kassam Walter Reinisch Christine H. Lee 2015Gastroenterology2015,,:3
10Isolation, screening and identifi cation of Bacillus spp. as direct-fed microbial candidates for aflatoxin B_1 biodegradation显示文摘Objective: To evaluate the ability of Bacillus spp. as direct-fed microbials(DFM) to biodegrade al atoxin B1(AFB1) by using an in vitro digestive model simulating in vivo conditions.Methods: Sixty-nine Bacillus isolates were obtained from intestines, and soil samples were screened by using a selective media method against 0.25 and 1.00 μg/m L of AFB1 in modii ed Czapek-Dox medium. Plates were incubated at 37 °C and observed every two days for two weeks. Physiological properties of the three Bacillus spp. candidates were characterized biochemically and by 16 S r RNA sequence analyzes for identii cation. Tolerance to acidic p H, osmotic concentrations of Na Cl, bile salts were tested, and antimicrobial sensitivity proi les were also determined. Bacillus candidates were individually sporulated by using a solid fermentation method and combined. Spores were incorporated into 1 of 3 experimental feed groups: 1) Negative control group, with unmedicated starter broiler feed without AFB1; 2) Positive control group, with negative control feed contaminated with 0.01% AFB1; 3) DFM treated group, with positive control feed supplemented with 109 spores/g. After digestion time(3:15 h), supernatants and digesta were collected for high-performance liquid chromatography l uorescence detection analysis by triplicate.Results: Three out of those sixty-nine DFM candidates showed ability to biodegrade AFB1 in vitro based on growth as well as reduction of l uorescence and area of clearance around each colony in modii ed Czapek-Dox medium which was clearly visible under day light after 48 h of evaluation. Analysis of 16S-DNA identii ed the strains as Bacillus amyloliquefaciens, Bacillus megaterium and Bacillus subtilis. The three Bacillus strains were tolerant to acidic conditions(p H 2.0), tolerant to a high osmotic pressure(Na Cl at 6.5%), and were able to tolerate 0.037% bile salts after 24 h of incubation. No signii cant dif erences(P > 0.05) were observed in the concentrations of AFB1 in neither the supernatants nor digesta samples evaluated by highperformance liquid chromatography with l uorescence detection between positive control or DFM treated groups. Conclusions: In vitro digestion time was not enough to confirm biodegradation of AFB1. Further studies to evaluate the possible biodegradation ef ects of the BacillusDFM when continuously administered in experimentally contaminated feed with AFB1, are in progress.Rosario Galarza-Seeber Juan David Latorre Xochitl Hernandez-Velasco Amanda Drake Wolfenden Lisa Renee Bielke Anita Menconi Billy Marshall Hargis Guillermo Tellez 2015Asian Pacific Journal of Tropical Biomedicine2015,5,9:3
11Mutational Processes Molding the Genomes of 21 Breast Cancers显示文摘Serena Nik-Zainal Ludmil B. Alexandrov David C. Wedge Peter Van Loo Christopher D. Greenman Keiran Raine David Jones Jonathan Hinton John Marshall Lucy A. Stebbings Andrew Menzies Sancha Martin Kenric Leung Lina Chen Catherine Leroy Manasa Ramakrishna Ric 2012Cell2012,,5:2
12Minimally Invasive Surgery Improves Short-term Outcomes in Elderly Colorectal Cancer Patients显示文摘Celia N. Robinson Courtney J. Balentine Christy L. Marshall Jonathan A. Wilks Daniel Anaya Avo Artinyan David H. Berger Daniel Albo 2011Journal of Surgical Research2011,,2:2
13An international, multicentre, prospective, randomised, controlled, unblinded, parallel-group trial of robotic-assisted versus standard laparoscopic surgery for the curative treatment of rectal cancer显示文摘Fiona J. Collinson David G. Jayne Alessio Pigazzi Charles Tsang Jennifer M. Barrie Richard Edlin Christopher Garbett Pierre Guillou Ivana Holloway Helen Howard Helen Marshall Christopher McCabe Sue Pavitt Phil Quirke Carly S. Rivers Julia M. B. Brown 2012International Journal of Colorectal Disease2012,,2:2
14Land cover changes and their biogeophysical effects on climate显示文摘Rezaul Mahmood Roger A. Pielke Kenneth G. Hubbard Dev Niyogi Paul A. Dirmeyer Clive McAlpine Andrew M. Carleton Robert Hale Samuel Gameda Adriana Beltrán‐Przekurat Bruce Baker Richard McNider David R. Legates Marshall Shepherd Jinyang Du Peter D. Blanken 2014Int J Climatol2014,,4:1
15Prevention of Overweight/Obesity as a Strategy to Optimize Cardiovascular Health显示文摘Marc-Andre Cornier Julie A. Marshall James O. Hill David M. Maahs Robert H. Eckel 2011Circulation2011,,7:1
16Incidence and Management of Life-Threatening Adverse Events During Cardiac Catheterization for Congenital Heart Disease显示文摘C. Huie Lin Sanjeet Hegde Audrey C. Marshall Diego Porras Kimberlee Gauvreau David T. Balzer Robert H. Beekman Alejandro Torres Julie A. Vincent John W. Moore Ralf Holzer Laurie Armsby Lisa Bergersen 2014Pediatric Cardiology2014,,1:1
17How (Un)Useful is the Pelvic Ring Stability Examination in Diagnosing Mechanically Unstable Pelvic Fractures in Blunt Trauma Patients?显示文摘Gil Z. Shlamovitz William R. Mower Jonathan Bergman Kenneth R. Chuang Jonathan Crisp David Hardy Martine Sargent Sunil D. Shroff Eric Snyder Marshall T. Morgan 2009The Journal of Trauma: Injury, Infection, and Critical Care2009,,3:1
18A Perspective on Canada's Ecosystems显示文摘Wiken David Gauthier Ian Marshall etc 1996CCEA Occasional Paper1996,,14:1
19The hiring of accounting and finance officers from audit firms: how did the market react?显示文摘Marshall A. Geiger Clive S. Lennox David S. North Review of Accounting Studies0,,:1
20Impact of C-arm CT on Hepatic Arterial Interventions for Hepatic Malignancies显示文摘Michael J. Wallace Ravi Murthy Paresh P. Kamat Teri Moore Sujaya H. Rao Joe Ensor Sanjay Gupta Kamran Ahrar David C. Madoff Stephen E. McRae Marshall E. Hicks 2007Journal of Vascular and Interventional Radiology2007,,12:1
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