检索结果-南通市图书馆

使用窄带成像技术对Barrett食管的黏膜和血管模式(黏膜形态学)进行检查与分类

世界核心医学期刊文摘（胃肠病学分册） 2006年第12期2卷 35-36页

作者： kara m.a. Ennahachi m. Fockens P. J.J.G.H.m.Bergman ten Kate 周智勇 Departments of Gastroenterology and Hepatology Drs Departments of Gastroenterology and Hepatology Departments of Gastroenterology and Hepatology Dr Academic medical Center AmsterdamNetherlands Dr

Background:The detection of the mucosal morphology(ie,mucosal and vascular patterns) in Barrett’s esophagus(BE) by magnifying(chromo) endoscopy may improve the distinction of high-grade intraepithelial neoplasia(HGIN) from nondysplastic specialized intestinal metaplasia(SIm) .Narrow band imaging(NBI) is a new technique that uses optical filters to enhance the mucosal contrast without the need for ***:To use NBI for the characterization and the classification of the mucosal morphology in nondysplastic BE and in BE with ***:Descriptive ***:Single-center study in a tertiary referral center for the diagnosis and treatment of patients with ***:We used NBI with magnifying endoscopy to image and biopsy randomly selected areas in 63 patients with BE.A systematic image and a biopsy specimen evaluation process was followed,including unblinded assessment of an exploratory set of images and biopsy specimens,and blinded evaluation of learning and validation *** Outcome m.a.urements:The relationship between the mucosal morphology and the presence of SIm.a.d ***:SIm was characterized by either villous/gyrus-forming patterns(80%) ,which were mostly regular and had regular vascular patterns,or a flat mucosa with regular normal-appearing long branching vessels(20%) .HGIN was characterized by 3 abnormalities:irregular/disrupted mucosal patterns,irregular vascular patterns,and abnormal blood *** areas with HGIN had at least 1 abnormality,and 85% had 2 or more *** frequency of abnormalities showed a significant rise with increasing grades of *** magnified NBI images had a sensitivity of 94%,a specificity of 76%,a positive predictive value of 64%,and a negative predictive value of 98% for ***:No data on observer ***:NBI with magnification reveals the mucosalmorphology characteristics of nondysplastic BE and HGIN,without the need for staining and has a relatively h

关键词： Barrett 窄带成像黏膜形态色素内镜肠化生不典型增生上皮内瘤活检标本病理标本滤光

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

内镜下视频自动荧光成像继窄带成像技术用于诊断Barrett食管的早期瘤形成

引用

世界核心医学期刊文摘（胃肠病学分册） 2006年第12期2卷 36-37页

作者： kara m.a. Peters F.P. Fockens P. J.J.G.H.m.Bergman 周智勇 Ber Academic Medical CenterAmsterdamNetherlands Drs Ber Academic Medical CenterAmsterdamNetherlands Departments of Gastroenterology and Hepatology Dr.

Background:Video-autofluorescence imaging(AFI) and narrow band imaging(NBI) are new endoscopic techniques that may improve the detection of high-grade intraepithelial neoplasia(HGIN) in Barrett’s esophagus(BE) .AFI improves the detection of lesions but may give false-positive *** allows for detailed inspection of the mucosal and(micro) vascular patterns,which are related to ***:A proof-of-principle study to combine AFI and NBI to improve the detection of HGIN and to reduce false-positive ***:Cross-sectional study of consecutive eligible ***:***:Twenty patients with BE with suspected or endoscopically treated HGIN were investigated with 2 prototype imaging systems:AFI(inspection with high-resolution videoendoscopy and autofluorescence imaging for detection of lesions) and NBI(for detailed inspection of mucosal and vascular patterns of identified lesions) .Lesions were sampled for histopathologic *** Outcome m.a.urements:The positive predictive value of AFI alone and of AFI-NBI for detecting HGIN and the reduction of falsepositive findings because of the use of ***:All of the 28 lesions with HGIN were identified with *** were identified with white light(61%) .Forty-seven suspicious lesions were detected with AFI:28 contained HGIN(60%) and 19 were false positive(40%) .With NBI,25 of the true-positive lesions had definitely suspicious patterns,and 3 had dubiously suspicious *** the 19 false positives,14 were not suspicious on *** false-positive rate,therefore,was reduced from 40% to 10%.Low-grade dysplasia was found in 4 of the remaining 5 false *** of the 14 patients with HGIN were identified by AFI-NBI(sensitivity 100%) .Limitations:Uncontrolled study in high-risk ***:This proof-of-principle study confirms that AFI can be used as a red-flag technique to detect suspicious *** NBI,detailed inspection of the surface patterns can be

关键词： Barrett 窄带成像荧光成像瘤形成假阳性诊断率可疑病变上皮内瘤显像系统单中心

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

内镜自体荧光成像技术将提高Barrett食管早期瘤检测率

引用

世界核心医学期刊文摘（胃肠病学分册） 2005年第9期1卷 30-31页

作者： kara m.a. Peters F.P. Ten Kate F.J.W. J.J.G.H.m. Bergman 赵天智 Dept. of Gastroenterol. and Hepatol. Academic Medical Center Meibergdreef 9 1105 AZ Amsterdam Netherlands Dr.

Background: The aim of this study was to investigate the feasibility of detecting high-grade dysplasia (HGD) and early cancer (EC) in Barrett’s esophagus (BE) with a prototype video autofluorescence endoscope. methods: Sixty patients with BE were evaluated with a prototype, high-resolution video-endoscope that has separate charge-coupled devices for white light endoscopy (WLE) and autofluorescence imaging (AFI). Nondysplastic BE appears green on AFI, whereas potentially neoplastic areas appear blue/violet. The BE was first screened with WLE for visible abnormalities and then was examined by AFI to detect additional lesions. Lesions that raised a suspicion of neoplasia and control areas that were normal on AFI were sampled for histopathologic assessment. Finally, random 4-quadrant biopsy specimens were obtained at 2-cm intervals. Results: A diagnosis of HGD/EC was made in 22 patients; one patient had no visible abnormality, and 21 had endoscopically detectable areas with HGD/EC. In 6 of the latter 21 patients, the HGD/EC was detected with AFI alone; in another patient, HGD/EC was detected with AFI and random biopsies. In 14 patients, HGD/EC was detected with both WLE and AFI; in 3 of these 14 patients, additional lesions containing HGD/EC were detected by AFI alone. Conclusions: The results of this study suggest that video AFI may improve the detection of HGD/EC in patients with BE.

关键词： Barrett 自体荧光不典型增生瘤形成早期癌变组织病理学屏幕显示天智高分辨率四象限

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

一项激光诱导荧光内镜与标准电视内镜对Barrett食管早期瘤检测能力的随机、交叉研究

引用

世界核心医学期刊文摘（胃肠病学分册） 2005年第9期1卷 30-30页

作者： kara m.a. Smits m.E. Rosmolen W.D. J.J.G.H.m. Bergman 赵天智 Dept. of Gastroenterol. and Hepatol. Academic Medical Center Meibergdreef 9 1105 AZ Amsterdam Netherlands Dr.

Background: Light-induced fluorescence endoscopy (LIFE)-may improve the detection of high-grade dysplasia (HGD) and early stage cancer (EC) in Barrett’s esophagus (BE). The aim of this study was to com.a.e LIFE with standard endoscopy (SE) in a randomized crossover study. methods: Fifty patients with BE underwent SE and LIFE in a randomized sequence (4 to 6-week interval between procedures). The two procedures were performed by two different endoscopists who were blinded to the findings of the other examination. Targeted biopsy specimens were taken from detected lesions, followed by random biopsy specimens with a 2 cm interval, 4-quadrant protocol. Biopsy specimens were routinely evaluated and subsequently reviewed by a single, blinded expert GI pathologist. Results: Targeted biopsy specimens had a sensitivity for the diagnosis of HGD/EC of 62%(8/13) for both techniques. The overall sensitivity (all biopsy specimens) was 85%for SE and 69%for LIFE (p = 0.69). All targeted biopsy specimens had a positive predictive value (PPV) for HGD/EC of 41%for SE and 28%for LIFE (p = 0.40); autofluorescence-targeted biopsy specimens had a PPV of 13%. False-positive lesions had a significantly higher rate of acute inflam.a.ion than random biopsy specimens. Conclusions: In this study, LIFE did not improve the detection of HGD or EC in patients with BE com.a.ed with SE.

关键词： Barrett 电视内镜交叉研究活检标本激光诱导荧光假阳性病变胃肠病异型增生诊断灵敏度早期癌变

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

高清晰内镜结合色素内镜或窄带成像在Barrett食管中的应用:一项前瞻性、随机、交叉研究

引用

世界核心医学期刊文摘（胃肠病学分册） 2006年第2期2卷 19-19页

作者： kara m.a. Peters F.P. Rosmolen W.D. J.J.G.H.m. Bergman 孟欣颖 Dept. of Gastroenterology and Hepatology Academic Medical Center Meibergd-reef 9 1105 AZ Amsterdam Netherlands Dr.

Background and study aims: High- resolution endoscopy (HRE) may improve the detection of early neoplasia in Barrett s esophagus. Indigo carmine chromoendoscopy (ICC) and narrow- band imaging (NBI) may be useful techniques to complement HRE. The aim of this study was to com.a.e HRE- ICC with HRE- NBI for the detection of high- grade dysplasia or early cancer (HGD/EC) in patients with Barrett s esophagus. Patients and methods: Twenty- eight patients with Barrett s esophagus underwent HRE- ICC and HRE- NBI (separated by 6- 8weeks) in a randomized sequence. The two procedures were performed by two different endoscopists, who were blinded to the findings of the other examination. Targeted biopsies were taken from.a.l detected lesions, followed by four- quadrant biopsies at 2- cm intervals. Biopsy evaluation was supervised by a single expert pathologist, who was blinded to the imaging technique used. Results: Fourteen patients were diagnosed with HGD/EC. The sensitivity for HGD/EC was 93 % and 86% for HRE- ICC and HRE- NBI, respectively. Targeted biopsies had a sensitivity of 79% with HRE alone. HGD was diagnosed from random biopsies alone in only one patient. ICC and NBI detected a limited number of additional lesions occult to HRE, but these lesions did not alter the sensitivity for identifying patients with HGD/EC. Conclusions: In most patients with high- grade dysplasia or early cancer in Barrett s esophagus, subtle lesions can be identified with high- resolution endoscopy. Indigo carmine chromoendoscopy and narrow- band imaging are com.a.able as adjuncts to high- resolution endoscopy.

关键词： Barrett食管色素内镜窄带成像交叉研究靛胭脂早期癌不典型增生早期肿瘤活检诊断辅

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The evolution of aposematism is accom.a.ied by increased diversification

引用

Integrative Zoology 2008年第3期3卷 149-156页

作者： kara PRZECZEK Carla mUELLER Steven m.VAmOSI Department of Biological Sciences University of CalgaryCalgaryCanada

Although the use of distinct colors to indicate unprofitability to predators(***)is commonly thought of as an adaptation,our knowledge of its macroevolutionary effects is *** aposematism is expected to decrease attacks by predators,we hypothesized that aposematic lineages should be larger on average than their non-aposematic sister groups because of the decreased probability of extinction and/or increased probability of speciation(*** diversification).The results of our sister-group analysis are consistent with the hypothesis that the evolution of aposematism is accom.a.ied by increased diversification of lineages,with the aposematic focal group having more species in 11 of 14 pairs of sister *** the apparent advantages of reduced predation risk on diversification rates,the evolution of aposematism is relatively rare and reversions to a cryptic state are not *** addition to the difficulties in evolving a trait that initially decreases the survivorship of prey among naïve predators,we discuss other factors that may limit the apparent prevalence and success of *** is hoped that the results of our analysis will encourage further analyses of the phylogenetic relationships among aposematic groups and their relatives,and of the evolutionary time scales over which the benefits of aposematism.a.e the greatest to lineages with this condition.

关键词： aposematism diversification predation sister-group com.a.isons speciation.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ON THE m^(th) ORDER DIFFERENCE SEQUENCE SPACE OF GENERALIZED WEIGHTED m.a. AND COm.a.T OPERATORS

引用

Acta mathematica Scientia 2013年第3期33卷 797-813页

作者： metin BASARIR Em.a. Evren kara Department of mathematics Sakarya University Department of mathematics Bilecik Seyh Edebali University

In this article, using generalized weighted m.a. and difference matrix of order m, we introduce the paranormed sequence space l（u, v, p; △（m））, which consist of the sequences whose generalized weighted △（m）-difference m.a.s are in the linear space l（p） defined by ***. Also, we determine the basis of this space and compute its α-, β- and γ-duals. Further, we give the characterization of the classes of matrix mappings from l（u, v, p, △（m）） to l∞, c, and co. Finally, we apply the Hausdorff m.a.ure of noncom.a.ness to characterize some classes of com.a.t operators given by matrices on the space lp（U, v, △（m））（1 ≤ p 〈 ∞）.

关键词： Paranormed sequence spaces difference sequence spaces weighted m.a. α-,β, γ-duals, matrix mappings Hausdorff m.a.ure of noncom.a.tness com.a.toperators

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Prediction of the undrained shear strength of remolded soil with non-linear regression,fuzzy logic,and artificial neural network

引用

Journal of mountain Science 2024年第9期21卷 3108-3122页

作者： YÜNKÜL Kaan karaÇOR Fatih GÜRBÜZ Ayhan BUDAK TahsinÖmür Department of Civil Engineering Faculty of Engineering and ArchitectureTokat Gaziosmanpaşa UniversityTokat 60100Türkiye Department of Civil Engineering Faculty of Engineering and ArchitectureKafkas UniversityKars 36000Türkiye Department of Civil Engineering Faculty of EngineeringGazi UniversityAnkara 06570Türkiye ministry of Youth and Sports Ankara 06090Türkiye

This study aims to predict the undrained shear strength of remolded soil samples using non-linear regression analyses,fuzzy logic,and artificial neural network modeling.A total of 1306 undrained shear strength results from 230 different remolded soil test settings reported in 21 publications were collected,utilizing six different m.a.urement *** water content,plastic limit,and liquid limit were used as input parameters for fuzzy logic and artificial neural network modeling,liquidity index or water content ratio was considered as an input parameter for non-linear regression *** non-linear regression analyses,12 different regression equations were derived for the prediction of undrained shear strength of remolded ***-Forward backpropagation and the TANSIG transfer function were used for artificial neural network modeling,while the mam.a.i inference system was preferred with trapezoidal and triangular membership functions for fuzzy logic *** experimental results of 914 tests were used for training of the artificial neural network models,196 for validation and 196 for *** was observed that the accuracy of the artificial neural network and fuzzy logic modeling was higher than that of the non-linear regression ***,a simple and reliable regression equation was proposed for assessments of undrained shear strength values with higher coefficients of determination.

关键词： Undrained shear strength Liquidity index Water content ratio Non-linear regression Artificial neural networks Fuzzy logic

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Emissions and noise mitigation through use of electric motorcycles

引用

Transportation Safety and Environment 2019年第2期1卷 164-175页

作者： michael Hernandez kara m.Kockelman James O.Lentz Jooyong Lee Department of Civil Architecturaland Environmental EngineeringThe University of Texas at Austin301 E Dean KeetonECJSuite 6.9AustinTX 78712-1076USA

Gasoline-powered motorcycles contribute disproportionately to traffic noise and emissions,so motorcycle electrification merits *** advances in battery efficiency allow electric motorcycles(EmCs)to join electric cars and bicycles as a viable consumer *** study quantifies noise and emissions using both simulations and experimental data,examines the factors that make motorcycles big offender and uses popular EmC makes and models to estimate the costs and benefits of electrification in the *** produce more CO,CH4,NOx,HC and particulate matter per vehicle-mile travelled than passenger *** to limited regulation of motorcycles and weak enforcement,the perceived noise level of motorcycles exceeds that of most other vehicles,being roughly double those of automobiles at speeds of over 30 mph and surpassing even those of medium trucks and buses at speeds of over 50 mph,at which point motorcycles exceeds the 80 dBA US standard *** can resolve such issues,although range limitations and high prices are presently a barrier to widespread *** order to realize these environmental benefits,it is important that electrification occurs with a corresponding shift away from coal as an energy *** emission regulations and stronger enforcement of existing prohibitions on certain forms of customization could also reduce the outlier status of gasoline-powered motorcycles.

关键词： motorcycles electric motorcycles motorcycle emissions motorcycle sound emissions electrification

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The effect of the CHAmP intervention on fundamental motor skills and outdoor physical activity in preschoolers

引用

Journal of Sport and Health Science 2019年第2期8卷 98-105页

作者： kara K.Palmer Katherine m.Chinn Leah E.Robinson Child movement Activity and Developmental Heanlth Laboratory University of Michigan Center for Human Growth and Development University of Michigan

Purpose: Physical activity(PA) and fundamental motor skills are important components of current and future trajectories of health in young children. This study examined the effects of a 5-week motor skill intervention on preschoolers' motor skill competence and their PA behaviors while participating in the motor skill intervention or outdoor free play(recess).methods: A total of 102 preschoolers served as participants and were part of a motor skill intervention group(n = 64) or a control/outdoor free play group(n = 38). Children's motor skills were assessed before and after the intervention using the Test of Gross motor Development-3 rd edition. PA during the motor skill intervention and outdoor free play was assessed using accelerometers both immediately before the start(baseline, Week 0 or Week 1) and end(late, Week 5 or Week 6) of the ***: All children significantly improved their motor skills from baseline to late assessment(p motor skill intervention demonstrated greater rates of change(p motor skills at the late assessment com.a.ed with the control group(p milarly, there was no effect of group on PA during days with the movement program(intervention vs. outdoor free play) at either time point, but boys were more active than girls at the late assessment(p more PA while participating in the intervention toward the end of the intervention than at the ***: The 5-week motor skill intervention was effective at improving preschoolers' motor skills and rates of change in motor skills were higher for children who completed the intervention com.a.ed with children in the control group. Preschoolers in the intervention did demonstrate PA changes while par

关键词： Gross motor skills Intervention motor development: Pediatrics Physical activity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：