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Listening plus : authentic recordings with tasks to develop listening skills and learner training (student's book) / JOHN McDOWELL,christopher hart.

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1987年

作者： JOHN McDOWELL christopher hart.

来源：畅想之星图书光盘版（南... 评论

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Spatio-temporal analysis of flowering using Li DAR topography

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Journal of Geographical Sciences 2017年第1期27卷 62-78页

作者： hart.Samantha MIKHAILOVA Elena POST christopher Mc MILLAN Patrick SHARP Julia BRIDGES William Department of Forestry and Environmental Conservation Clemson University SC 29634 USA Department of Mathematical Sciences Clemson University SC 29634 USA

Spatio-temporal patterns of flowering in forest ecosystems are hard to quantify and monitor. The objectives of this study were to investigate spatio-temporal patterns（e.g. soilssimple slope classesslope aspectand flow accumulation） of flowering around Lake IssaqueenaSouth Carolina（SCUSA） using plant-flowering database collected with GPS- enabled camera（stored in Picasa 3 web albums and project website） on a monthly basis in 2012 and Li DAR-based topography. Pacolet fine sandy loam had the most flowering plantsfollowed by Madison sandy loamboth dominant soil types around the lake. Most flowering plants were on moderately steep（17%–30%） and gently sloping（4%–8%） slopes. Most flowering plants were on west（247.5°–292.5°）southwest（202.5°–247.5°）and northwest（292.5°–337.5°） aspects. Most flowering plants were associated with minimum and maximum flows within the landscape. Chi-square tests indicated differences in the distributions of the proportions of flowering plants were significant by soil typeslopeaspectand flow accumulation for each month（February-November）for all months（overall）and across months. The Chi-square test on area-normalized data indicated significant differences for all months and individual differences by each month with some months not statistically significant. Cluster analysis on flowering counts for nine plant families with the most flowering counts indicated no unique separation by clusterbut implied that the majority of these families were flowering on strongly sloping（9%–16%） slopeson southwest（202.5°–247.5°） aspectsand low flow accumulation（0–200）. Presented methodology can serve as a template for future efforts to quantify spatio-temporal patterns of flowering and other phenological events.

关键词： aspect flow accumulation Geographic Information Systems(GIS) phenology soils

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Positron Emission Projection Imaging:A technique for concentration field measurements in opaque industrial systems

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Particuology 2024年第11期94卷 1-15页

作者： Roberto hart.Villamil Jack Sykes Andy Ingram christopher R.K.Windows-Yule Santosh Kumar Gupta School of Chemical Engineering University of BirminghamB152TTUK School of Physics and Astronomy University of BirminghamB152TTUK Hindustan Unilever R&D BengaluruKarnataka560066India

A novel Positron Emission Projection Imaging(PEPI)algorithm designed to compute the plane-projected spatial distribution of radiolabelled materials without the need for collimation is *** leveraging improved data efficiency,we have achieved a technique with enhanced spatial resolution and temporal resolution compared to previous PEPI *** of this algorithm was conducted using synthetic data generated from a digital twin of a PET scanner,demonstrating its accuracy for practical *** industrial advantage of this novel algorithm was applied in the imaging of laminar flow mixing within a ploughshare mixer,with the experimental results compared against those obtained from validated computational fluid dynamics(CFD)*** comparison highlights an important use case for PEPI as a robust validation tool for CFD simulations,crucial for enhancing industrial ***,which uses deeply penetrating gamma-photons,is now capable of imaging opaque fluids and solids in industrial *** directions for this work include further algorithmic refinements and expanding its application across various industrial systems,establishing PEPI as a robust tool for in-depth industrial process *** advancements presented here allow for optimized mixer design and enhanced process efficiency,extending the frontiers of tomographic imaging in industrial applications.

关键词： Positron emission projection imaging Positron emission particle tracking Computational fluid dynamics Mixing Ploughshare mixer

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An Optimal Control Approach for the Registration of Image Time-Series

An Optimal Control Approach for the Registration of Image Ti...

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Joint 48th IEEE Conference on Decision and Control and 28th Chinese Control Conference

作者： Marc Niethammer Gabriel L.hart.christopher Zach Department of Computer Science University of North Carolina at Chapel Hill Biomedical Research Imaging Center Medical SchoolUniversity of North Carolina at Chapel Hill

This paper discusses an optimal control approach for the registration of image time-series（growth modeling）.It combines and augments work on an optimal control formulation to optical flow with theory from large-displacement diffeomorphic image *** unification of the two viewpoints leads to（i） a more efficient computation of the gradient of the optimization problem,（ii） an easier numerical implementation,and（iii） an intuitive interpretation of the adjoint equation underlying the optimization ***,a novel formulation for the unbiased estimation of image correspondences across time is proposed.

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Can pathologists reliably establish ampulla of Vater carcinoma histologic subtype on H&E alone?Concordance of subtype and comparison to immunohistochemistry-established subtype

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Journal of Pancreatology 2019年第4期2卷 152-157页

作者： Tanager Kevin S Li Yueying Alpert Lindsay Setia Namrata Weber christopher hart.John Xiao Shu-Yuan Department of Pathology The University of Chicago MedicineChicagoIL Department of Pathology Wuhan University Zhongnan Hospital Wuhan University Center for Pathology and Molecular Diagnostics WuhanHubeiChina

Histologic subtyping of ampulla of Vater carcinoma(ampullary carcinoma,AC)may guide choice of adjuvant chemotherapy for advanced disease,as intestinal(INT)subtype may have a better treatment response and survival as compared to the pancreatobiliary(PB)and mixed(MIX)***,ambiguous morphologic features can result in inconsistent subtyping among *** immunohistochemistry(IHC)for cytokeratin(CK)7,CK20,CDX2,and the Mucin(MUC)family proteins had been used to aid in the *** is important to determine if accurate subtyping can be achieved based on hematoxylin and eosin(H&E)evaluation alone,or if IHC is *** this study,5 gastrointestinal pathologists evaluated 34 cases of AC for histologic subtype(PB,INT,or MIX)based on H&E stain *** studies(CK7,CK20,and CDX2)were used to determine a gold standard subtyping for comparison(strong CK7 with weak CK20 and CDX2=PB;strong CK20 or CDX2 and weak CK7=INT;strong CK7 and CK20 or CDX2=MIX).Interobserver concordance(kappa)was *** correctness of subtyping was calculated in relation to IHC-established subtype gold *** concordance for subtype was fair(kappa 0.31).Percent correctness for subtype against IHC-established subtype was 50%for a majority(3 or more)of *** all 11 cases with 4 or 5 pathologists being concordant,the subtype was also correctly *** addition,data on chemotherapy regimen and overall survival was gathered from the electronic medical *** who were assigned a subtype at time of diagnosis tended to receive gemcitabine for PB subtype,and FOLFOX-based therapy for INT subtype,with some cases diagnosed as"not-otherwise specified"typically also receiving *** data were limited by loss to *** conclusion,despite 11 cases with strong concordance and correctness,overall subtyping concordance was only fair,and a majority of the 5 pathologists correctly identified the subtype in only 50%of cases.T

关键词： Ampulla of Vater Immunohistochemistry Immunophenotyping Prognosis Subtype

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HP83480数字通信分析仪的硬件测量算法

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光通信研究 1997年第4期 50-55页

作者： Michael G.hart. christopher P.Duff, and Stephen W.Hinch(Hewlett Packard, Beijing 100004))

参数测量主要指对波形特性，如上升时间、下降时间、过冲、周期、脉冲波形或眼图的幅度等。掩码测量将波形与预定掩码比较。眼参数测量是专用于眼图性质的测量，如眼高、眼宽、抖动、交叉高度和消光比等。

关键词：测量仪表数字通信分析仪掩码测量

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Use of volumetric laser endomicroscopy for dysplasia detection at the gastroesophageal junction and gastric cardia

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World Journal of Gastrointestinal Endoscopy 2017年第7期9卷 319-326页

作者： Nina Gupta Uzma Siddiqui Irving Waxman christopher Chapman Ann Koons Vesta Valuckaite Shu-Yuan Xiao Namrata Setia John hart.Vani Konda Department of Medicine University of Chicago Medical Center Center of Endoscopic Research and Therapeutics Department of MedicineUniversity of Chicago Medical Center Department of Pathology University of Chicago Medical Center

To determine specific volumetric laser endomicroscopy (VLE) imaging features associated with neoplasia at the gastroesophageal junction (GEJ) and gastric cardia. METHODSDuring esophagogastroduodenoscopy for patients with known or suspected Barrett’s esophagus, VLE was performed before biopsies were taken at endoscopists’ discretion. The gastric cardia was examined on VLE scan from the GEJ (marked by top of gastric folds) to 1 cm distal from the GEJ. The NinePoints VLE console was used to analyze scan segments for characteristics previously found to correlate with normal or abnormal mucosa. Glands were counted individually. Imaging features identified on VLE scan were correlated with biopsy results from the GEJ and cardia region. RESULTSThis study included 34 cases. Features characteristic of the gastric cardia (gastric rugae, gastric pit architecture, poor penetration) were observed in all (100%) scans. Loss of classic gastric pit architecture was common and there was no difference between those with neoplasia and without (100% vs 74%, P = NS). The abnormal VLE feature of irregular surface was more often seen in patients with neoplasia than those without (100% vs 18%, P < 0.0001), as was heterogeneous scattering (86% vs 41%, P < 0.005) and presence of anomalous glands (100% vs 59%, P < 0.05). The number of anomalous glands did not differ between individual histologic subgroups (ANOVA, P = NS). CONCLUSIONThe transition from esophagus to gastric cardia is reliably identified on VLE. Histologically abnormal cardia mucosa produces abnormal VLE features. Optical coherence tomography algorithms can be expanded for use at the GEJ/cardia.

关键词： Volumetric laser endomicroscopy Cardia Gastroesophageal junction Barrett’s Optical coherence tomography Neoplasia

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