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64层与256层前门控冠状动脉CT横断成像的影像质量和有效放射剂量的对比研究

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国际医学放射学杂志 2010年第4期 395-395页

作者： o.klass M.Walker A.Siebach T.Stuber S.Feuerlein M.Juchems 赵芳 Department of Diagnostic and Interventional Radiology University Hospital of UlmSteinhvelstr.989075 UlmGermany

目的对比研究64层与256层CT前门控冠状动脉横断成像的影像质量和有效放射剂量。方法根据年龄、性别、体质量指数和心率将病人配成2组,每组80例,分别行256层与64层CT扫

关键词：影像质量放射剂量辐射剂量冠状动脉对比研究 CT 前门

A Characteristic Boundary Condition for Multispeed Lattice Boltzmann Methods

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Communications in Computational Physics 2023年第1期33卷 101-117页

作者： Friedemann klass Alessandro Gabbana Andreas Bartel University of Wuppertal Gausstrase 2042119 WuppertalGermany Eindhoven University of Technology 5600 MB EindhovenThe Netherlands

We present the development of a non-reflecting boundary condition,based on the Local one-Dimensional Inviscid(LoDI)approach,for Lattice Boltzmann Models working with multi-speed *** test and evaluate the LoDI implementation with numerical benchmarks,showing significant accuracy gains with respect to the results produced by a simple zerogradient *** also implement a simplified approach,which allows handling the unknown distribution functions spanning several layers of nodes in a unified way,still preserving a comparable level of accuracy with respect to the standard formulation.

关键词： Characteristic boundary condition non-reflective boundary conditions local onedimensional inviscid boundary conditions lattice Boltzmann method multispeed high order models

Aberrant celio-mesenteric supply of the splenic flexure:Provoking a bleed

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World Journal of Gastroenterology 2013年第39期19卷 6679-6682页

作者： Matthew Wu Darren klass Evgeny Strovski Baljinder Salh David Liu Faculty of Medicine Dalhousie UniversityHalifaxNS B3H 4R2Canada Department of Radiology University of British ColumbiaVancouver General HospitalVancouverBC V6Z 3G2Canada Department of Gastroenterology University of British ColumbiaVancouver General HospitalVancouverBC V6T 1Z4Canada

Lower gastrointestinal hemorrhage presents a common indication for hospitalization and account for over300000 admissions per year in the United *** imaging is often required to aid in localization of the hemorrhage prior to therapeutic intervention if endoscopic treatment *** includes computer tomography angiography,red blood cell tagged scintigraphy and conventional angiography,with scintigraphy being the most sensitive followed by computer tomography *** celio-mesenteric supply occurs in 2%of the population;however failure to identify this may result in failed endovascular *** tomography angiography is sensitive for arterial hemorrhage and delineates the anatomy,allowing the treating physician to plan an endovascular *** at the time of conventional angiography,the active bleed is not visualized,but the site of bleeding has been identified on computer tomography angiography,provocative angiography can be utilized in order to stimulate bleeding and subsequent targeted *** describe a case of lower gastrointestinal hemorrhage at the splenic flexure supplied by a celiomesenteric branch in a patient and provocative angiography with tissue plasminogen activator utilized at the time of treatment to illicit the site of hemorrhage and subsequent treatment.

关键词： Hemorrhage Mesenteric arteries Colon transverse Thrombolytic therapy Embolization therapeutic Computer tomography

Magnetic resonance venography and liver transplant complications

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World Journal of Gastroenterology 2013年第36期19卷 6110-6113页

作者： Evgeny Strovski Dave Liu Charles Scudamore Stephen Ho Eric Yoshida Darren klass Division of Interventional Radiology Department of RadiologyUniversity of British Columbia Vancouver General Hospital Division of Hepatobiliary Surgery Department of Surgery University of British Columbia Vancouver General Hospital Division of Gastroenterology Faculty of Medicine University of British Columbia Vancouver General Hospital

Hepatic vein stenosis is a rare but serious complication following liver *** modalities can be utilized to image the hepatic *** resonance venography(MRV)provides certain advantages over ultrasound,computed tomography angiography and digital subtraction *** utilizes the same imaging principles of magnetic resonance angiography in order to image the venous *** pool contrast agents,specifically gadofosveset trisodium,allow for steady state imaging up to 1 h following injection,with improved visualisation of vital venous structures by utilising delayed steady state ***,the inherent physics properties of magnetic resonance imaging also provide excellent soft tissue detail and thus help define the extent of complications that often plague the post-liver transplant *** case report describes the use of gadofosveset trisodium in a patient with hepatic venous stenosis following liver *** venography failed to outline the stenoses and thus MRV using a blood pool contrast agent was utilised in order to delineate the anatomy and plan a therapeutic endovascular procedure.

关键词： Magnetic resonance venography Blood pool Magnetic resonance angiography Nephrogenic systemic fibrosis Liver transplant Gadofosveset trisodium

If a Baby Has a Fever,Treatment All Depends

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科技英语学习 2009年第1期 7-9页

作者： Perri klass 刘广霞

对发烧的婴儿，不同月龄有不同的治疗方法。不足一个月的婴儿需住院治疗，三个月以上的婴儿要验血或验尿，但不必住院。而对于一至三个月的婴儿，要验血或验尿乃至进行细菌培养，以确定是否有感染、是否需要注射抗生素或住院。

关键词：英语教学翻译方法译文教学方法

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Update on Coated Papers, Coating Processes and Materials

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Update on Coated Papers, Coating Processes and Materials

Xenophobia in Post Apartheid South Africa:Causes,Effects and Solutions

2005中国造纸学会学术报告会

作者： Charles P. klass President klass Associates Inc 16326 Gulf Boulevard-Suite 104 Redington Beach Florida 33708 USA

＜正＞Coated papers are becoming a global business, and quality requirements are changing. Brightness requirements are trending upward, but opacity is trending slightly downward. Coated linerboard is an emerging new grade structure. Metered size press coating is gaining acceptance for the production of lightweight coated groundwood papers. Low angle jet applicator coaters are replacing both short dwell and applicator roll blade coaters. Curtain coating is forecast to be the next big trend in coating processes. Latex suppliers are providing new high strength and shear resistant latices. Styrene acrylate and styrene-butadiene-acrylate latices are replacing acetate and acrylic latices in board coating. New nano-particle starch binders show promise of competing with latices. Engineered pigments facilitate higher quality coated papers. Aragonite precipitated calcium carbonate can provide higher gloss. New non-mineral starch-based pigments show promise as replacements for mineral pigments. A newly developed modified natural zeolite overcomes many of the limitations of silica pigments in coating ink jet and digital imaging papers.

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Xenophobia in Post Apartheid South Africa:Causes,Effects and...

作者： PoRTIA N. klass（茉莉）山东大学

学位级别：硕士

South Africa affectionately known as a "Rainbow nation" gained its independence in 1994 from the authoritative apartheid regime. After years of oppression, segregation, racial exclusion and inequality the rainbow nation was born giving hope to many who finally were ready for equality, freedom and racial inclusion. The country also rose from sanctions and exclusion from the international community to becoming one of the Africa’s economically and industrialized able state. With this, South Africa was placed in the global arena, and in a context which enabled its greater engagement with the rest of the world and Africa, born from racism the new South Africa placed emphasis on nation-building, ubuntu （oneness） and emerging nationalism. The new South Africa however gave birth to discrimination and exclusion （new racism）.on April 2015, violence broke out in Durban directed towards migrants especially the ones of African origin, resulting in brutal killings of six people, looting in foreign owned shops as well as misplacements of thousands of foreigners who sought solace in police stations, churches, mosques and refugee camps. This was not the first time these attacks happened, their history can be traced to as early as 1994, since then xenophobic violence directed towards African immigrants has escalated regardless of the influx of migrants coming into South Africa. This has caused tremendous concern and frustrations in and outside South Africa. In the contemporary South Africa, politics of exclusion and inclusion have taken a different and new form, where migrants from Africa are excluded and targeted while white migrants from Europe and other countries are embraced and *** concept of xenophobia is explained as fear of something strange and foreign, however, in South Africa this is directed only towards African foreigners. Xenophobia is a complex phenomenon which involves scapegoating of foreigners as well as politics of access. This thesis argues that the xeno

关键词： Xenophobia scapegoat racial exclusion nationalism apartheid migrants

optimized nerve block techniques while performing percutaneous hepatic ablation: Literature review and practical use

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Journal of Interventional Medicine 2020年第4期3卷 161-166页

作者： DM Liu A Hadjivassiliou D Valenti SG Ho D klass JB Chung PT Kim LM Boucher Faculty of Medicine University of British ColumbiaCanada Miller School of Medicine University of MiamiUSA Department of Radiology-Division of Interventional Radiology Vancouver General HospitalCanada Department of Radiology Vancouver General HospitalCanada Department of Surgery Division of Hepatopancraticobiliary Surgery/Liver Transplantation Vancouver General HospitalVancouverCanada Faculty of Medicine McGill UniversityDepartment of RadiologyDivision of Interventional RadiologyMcGill University Health CentreMontrealCanada Faculty of Applied Science University of British ColumbiaCanada

Percutaneous image guided thermal ablation has become a cornerstone of therapy for patients with oligometastatic disease and primary liver *** from percutaneous ethanol injection(PEI),thermal ablation utilizing radiofrequency ablation(RFA)and microwave ablation(MWA)have become the standard approach in the treatment of isolated lesions that fit within the size criteria for curative intent therapy(typically 3-4 cm).With the evolution of more intense thermal ablation,such as MWA,the dramatic increase in both the size of ablation zone and intensity of heat generation have extended the limits of this *** a result of these innovations,intra-procedural and post-procedural pain have also significantly increased,requiring either higher levels of intravenous sedation or,in some institutions,general *** addition to the increase in therapeutic intensity,the use of intravenous sedation during aggressive ablation procedures carries the risk of over-sedation when the noxious insult(*** ablation)is removed,adding further difficulty to post-procedural recovery and ***,high subdiaphragmatic lesions become challenging in this setting due to issues relating to sedation and compliance with breath hold/breathing *** general anesthesia may mitigate these complications,the added resources associated with providing general anesthesia during ablation is not cost effective and may result in substantial delays in *** reduction of Aerosol Generating Medical Procedures(AGMP),such as intubation due to the CoVID-19 Pandemic,must also be taken into *** to the potential increased risk of infection transmission,alternatives to general anesthesia should be considered when safe and *** abdominal regional nerve block techniques have been used to manage pain related to trauma,surgery,and cancer;however,blocks of this nature are not well described in the interventional radiology ***

关键词： anesthesia ablation corners

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非木浆原纸的涂布技术

国际造纸 2000年第6期19卷 35-41页

作者： Charles P.klass President klass Association Inc.USA

中国造纸工业面临着对高质量的纸和纸板日益增长的需求，因此具有改进纸张印刷适性、质量和产品性能的涂布技术显得尤为重要。计量施胶压榨技术可用于非木材纤维纸张的涂布，并生产出高质量的印刷纸。该文给出了生产涂布胶版印刷纸的涂... 详细信息

中国造纸工业面临着对高质量的纸和纸板日益增长的需求，因此具有改进纸张印刷适性、质量和产品性能的涂布技术显得尤为重要。计量施胶压榨技术可用于非木材纤维纸张的涂布，并生产出高质量的印刷纸。该文给出了生产涂布胶版印刷纸的涂布配方示例。中国的造纸厂使用国内废纸为原料，更存在原纸挺度差和吸收性强的限制。在其它发展中国家的实践已证明这种纸板的多次涂布工艺可以生产出高质量的产品，并且总的原料成本要比使用漂白硫酸盐木浆挂面的纸板低。在一个气管加压的棒式涂布机的背辊上使用封闭料池上料器，可同时对纸页两面进行处理。

关键词：涂布纸原纸非木材纸浆涂布技术

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