检索结果-南通市图书馆

地球与环境 1984年第8期 47-51+55页

作者： W.jansen m.Slaughter 刘永康

引言电子探针能在显微尺度上就地鉴定出矿物的成份及其分布,从而提供光片表面元素浓度的定量 X 射线资料。电子束在样品面上扫描,有三种方式:点、线、方格区。虽然点和线扫描能提供元素的定量浓度,但记录技术却往往使元素的区域分布在... 详细信息

引言电子探针能在显微尺度上就地鉴定出矿物的成份及其分布,从而提供光片表面元素浓度的定量 X 射线资料。电子束在样品面上扫描,有三种方式:点、线、方格区。虽然点和线扫描能提供元素的定量浓度,但记录技术却往往使元素的区域分布在图像上显示为亮点.亮点图像由于不能将重叠的点子区分出来,所以不能鉴别出浓度高的小区域。低密度点即使在这个区域,也被分光晶体掩盖了,结果使得点子图像统计不准确。放慢帧扫速率或增强电子束流来增加点子数目

关键词：元素浓度校正因子谱仪射线强度扫描器校正系数计算机数据矩阵电子光学仪器电子探针

Endovascular treatment in anterior circulation stroke beyond 6.5 hours after onset or time last seen well:results from the mR CLEAN Registry

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Stroke & Vascular Neurology 2021年第4期6卷 572-580,I0037-I0048页

作者： Luuk Dekker Esmee Venema F Anne V Pirson Charles B L m majoie Bart J Emmer Ivo G H jansen maxim J H L mulder Robin Lemmens Robert-Jan B Goldhoorn marieke J H Wermer Jelis Boiten Geert J LycklamaàNijeholt Yvo B W E m Roos Adriaan C G m van Es Hester F Lingsma Diederik W J Dippel Wim H van Zwam Robert J van Oostenbrugge Ido R van den Wijngaard on behalf of the mR CLEAN Registry investigators Neurology Leiden University Medical CentreLeidenThe Netherlands Neurology Erasmus MCRotterdamThe Netherlands Public Health Erasmus MCRotterdamThe Netherlands Neurology Maastricht University Medical Centre+MaastrichtThe Netherlands Radiology and Nuclear medicine Amsterdam University Medical CentreLocation AMCAmsterdamThe Netherlands Neurology University Hospitals LeuvenLeuvenBelgium Neurosciences Experimental Neurology and Leuven Brain InstituteUniversity of LeuvenLeuvenBelgium VIB Center for Brain&Disease ResearchLaboratory of NeurobiologyLeuvenBelgium Neurology Haaglanden Medical CentreDen HaagThe Netherlands Radiology Haaglanden Medical CentreDen HaagThe Netherlands Neurology Amsterdam University Medical CentreLocation AMCAmsterdamThe Netherlands Radiology Leiden University Medical CentreLeidenThe Netherlands Radiology Maastricht University Medical Centre+MaastrichtThe Netherlands

Background Randomised controlled trials with perfusion selection have shown benefit of endovascular treatment(EVT)for ischaemic stroke between 6 and 24 hours after symptom onset or time last seen ***,outcomes after EVT in these late window patients without perfusion imaging are largely *** assessed their characteristics and outcomes in routine clinical *** The multicenter Randomized Clinical Trial of Endovascular Treatment for Acute Ischemic Stroke in the Netherlands Registry,a prospective,multicentre study in the Netherlands,included patients with an anterior circulation occlusion who underwent EVT between 2014 and *** perfusion was no standard imaging *** used adjusted ordinal logistic regression analysis to compare patients treated within versus beyond 6.5 hours after propensity score matching on age,prestroke modified Rankin Scale(mRS),National Institutes of Health Stroke Scale,Alberta Stroke Programme Early CT Score(ASPECTS),collateral status,location of occlusion and treatment with intravenous *** included 3-month mRS score,functional independence(defined as mRS 0-2),and *** Of 3264 patients who underwent EVT,106(3.2%)were treated beyond 6.5 hours(median 8.5,IQR 6.9-10.6),of whom 93(87.7%)had unknown time of stroke *** perfusion was not performed in 87/106(80.2%)late window *** window patients were younger(mean 67 vs 70 years,pmedian 8 vs 9,pmatching,outcomes remained similar(adjusted common OR for 1 point improvement in mRS 1.04,95%CI 0.56 to 1.93).Conclusions Without the use of CT perfusion selection criteria,EVT in the 6.5-24-hour time window was not associated with poorer outcome in selected patients with favourable clinical and CT/C

关键词： treatment beyond Registry

Content Validation of the Dutch Version of the “Older Patients in Acute Care Survey”, an Instrument to measure the Attitude of Hospital Nurses towards Older Patients

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

International Journal of Clinical medicine 2015年第1期6卷 7-18页

作者： Andrea R. van Schelven jeroen Dikken Linda G. m. Sillekens Dirkje D. Oldenhuis marieke J. Schuurmans Jita G. Hoogerduijn Sonneburgh Foundation Rotterdam The Netherlands Research Group Care for the Chronically Ill Faculty of Health Care University of Applied Sciences Utrecht Utrecht The Netherlands Orbis medical Centre Sittard-Geleen The Netherlands The Hague University of Applied Sciences The Hague The Netherlands Department of Rehabilitation Nursing Science and Sports Utrecht University Utrecht The Netherlands

Aims and objectives: The aim of this study is to validate the “Older Patients in Acute Care Survey” (OPACS) in the Netherlands. Background: Worldwide the population of older people with multimorbidity increases which results in an increase of older hospitalized patients. Literature shows that nurses have a negative attitude towards older patients. To get insight and improve the attitude of nurses, a validated measurement instrument is needed. The OPACS measures hospital nurses' attitudes towards older patients and has proven good content validity in the USA and good face validity and reliability in Australia. Design: A cross-sectional study. methods: First the OPACS was translated using forward-backward method and testing clarity of wording with a pilot. Second content validity was determined using “method Lynn” and clarity of wording and appropriateness for measuring attitude were identified. Results: The OPACS showed acceptable content validity (CVI ≥ 0.78) for 14 items (out of 36) of Section A and 22 items (out of 50) of Section B. The content validity for the entire OPACS was (CVI = 0.62). 89.2% of the participants scored “clear in wording” and 75.6% of the participants qualified the OPACS appropriate for measuring attitude. Conclusions: The OPACS has good clarity of wording and good appropriateness for measuring attitude. The content validity is low which makes the current Dutch version not appropriate for measuring attitude of nurses in Dutch hospitals. Relevance to clinical practice: A measurement instrument to get insight in the attitude of nurses is a first step to improve a negative attitude. A positive attitude of nurses is important to provide good quality of care to the increasing population older people in hospitals. Working with reliable and validated scales is important. This study gives direction to make the OPACS suitable for the Dutch situation.

关键词： Attitude Nurses OPACS Content Validity Translation

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

支持面向项目组的产品开发过程的分布式系统

工程设计学报 1996年第3期3卷 5-10页

作者： F.-L.Krause m.Doblies H.jansen T.Kieseweter chr.Kind 陈巍

对产品开发过程不断变化的要求，使得有必要提供新型软件工具，这种工具以多媒体环境和新的协作技术为基础，为缩短产品开发周期，提高产品质量作出贡献。在此情况下通讯技术对支持基于计算机的合作，改进信息供给，提高培训举措的有效... 详细信息

对产品开发过程不断变化的要求，使得有必要提供新型软件工具，这种工具以多媒体环境和新的协作技术为基础，为缩短产品开发周期，提高产品质量作出贡献。在此情况下通讯技术对支持基于计算机的合作，改进信息供给，提高培训举措的有效性将发挥重要作用。本文将介绍Ｆｒａｕｎｈｏｆｅｒ生产设备和设计研究所（ＩＰＫ）设计技术部；柏林工业大学机床和制造技术研究所（ＩＷＦ）工业信息技术部的工作。

关键词：计算机分布式系统产品信息技术

Colour-ring wear and loss effects in citizen science mark-resighting studies

在线全文

学校读者我要写书评

暂无评论

Avian Research 2019年第2期10卷 148-162页

作者： Andrew m.Allen Bruno J.Ens martijn van de Pol Henk van der Jeugd magali Frauendorf Henk-Jan van der Kolk Kees Oosterbeek jeroen Nienhuis Eelke Jongejans Department of Animal Ecology and Physiology Radboud University6500 GL NijmegenThe Netherlands Sovon Dutch Centre for Field Ornithology 6503 GANijmegen and Sovon-Texel1790 AB Den BurgThe Netherlands Department of Animal Ecology Netherlands Institute of Ecology NIOOKNAW6708 PB WageningenThe Netherlands Dutch Centre for Avian migration and Demography 6700 AB WageningenThe Netherlands Centre for Avian Population Studies WageningenThe Netherlands

Background: Ring wear and loss may have important consequences for mark-recapture studies that aim to estimate survival trends. Our study quantifies the rates of wear and loss from a long-running colour-ringing project of the Eurasian Oystercatcher (Haematopus ostralegus) in the Netherlands. methods: Our analysis included 8909 colour-ringed oystercatchers with 118,071 resightings, predominantly ringed and observed by citizen scientists. We quantified how ring wear and loss may vary with ring colour and age, and how this may impact resighting probabilities. We then determined how ring loss may impact survival estimates and resighting probabilities of mark-recapture models by simulating four scenarios of how citizen scientists may resight and report birds with lost colour rings. Results: Annual rates of colour ring loss averaged 2.5% compared with 1% for ring wear, but lost rings also had a higher reporting probability (31.2%) than worn rings (10.3%). Lost rings may not directly impact survival estimates since 50% of oystercatchers with lost rings could still be uniquely identified. Ring wear and loss rapidly increased between 10 and 15 years after ringing. Rates of ring loss were comparable amongst ring colours, but the wear rate appeared higher for red and white rings compared to other colours. Rates of ring wear and loss varied significantly amongst different regions in our study, which were characterised as having different habitat features. Differential rates of ring wear may have important implications for studies conducted over large geographical scales or of multiple species. Conclusions: Based on simulations of ring loss in our population, estimates of apparent survival may be 0.3–1.2% lower whilst the impact of ring wear was deemed even lower. We developed a table of recommendations containing advice for ring fitting, data collection, study design, and mark-recapture analyses, so that future colour-ringing studies can benefit from our experiences in collecti

关键词： Bias Bird migration Citizen science Colour-ring mark-recapture Shorebirds Survival

在线全文

学校读者我要写书评

暂无评论

墨西哥青少年睡眠时间与血压的关系

中华高血压杂志(中英文) 2021年第2期29卷 198-198页

作者： jansen EC Dunietz GL matos-moreno A Solano m Lazcano-Ponce E Sánchez-Zamorano Lm 周卫叶鹏

全球有5%的儿童患有高血压,并预示着以后心血管病的发病率。关于成人睡眠不足与高血压的关系报道较多,但鲜有在儿童中进行研究的报道。本研究是在一个大型墨西哥儿童队列中分析晚睡(睡眠时间短的标志)和潜在的昼夜节律异常在偶发性高血...

全球有5%的儿童患有高血压,并预示着以后心血管病的发病率。关于成人睡眠不足与高血压的关系报道较多,但鲜有在儿童中进行研究的报道。本研究是在一个大型墨西哥儿童队列中分析晚睡(睡眠时间短的标志)和潜在的昼夜节律异常在偶发性高血压中的作用。方法:纳入2 033名来自墨西哥莫雷洛斯公立学校的无血压升高青少年,即血压<同性别、年龄和身高青少年血压的第90百分位数的青少年。

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

精炼糖厂中的原糖质量概况

广西蔗糖 2013年第1期 37-41,46页

作者： Terry m·jansen 韦雪珠刘慧霞澳大利亚manildraHarwood炼糖厂广西大学轻工与食品工程学院南宁530004

原糖质量是影响原糖价格和精炼糖厂效益的一个关键因素,炼糖厂为最优化其工厂运作效能而对原糖的质量要求越来越高,原糖厂应意识到原糖质量对其炼糖厂的影响,原糖的质量指标如糖度、色值、灰分、葡聚糖、过滤性、粒度、淀粉,通过影响精... 详细信息

原糖质量是影响原糖价格和精炼糖厂效益的一个关键因素,炼糖厂为最优化其工厂运作效能而对原糖的质量要求越来越高,原糖厂应意识到原糖质量对其炼糖厂的影响,原糖的质量指标如糖度、色值、灰分、葡聚糖、过滤性、粒度、淀粉,通过影响精炼的效益和效能而对炼糖厂较为重要。原糖的复筛质量及复筛糖中的非糖分是保持炼糖厂较佳生产率的关键成分,因此两者虽然不是炼糖厂特定的质量指标,但却是炼糖厂最为关注的项目。本文就manildraHarwood sugar炼糖厂实际生产经验,探讨原糖质量对精炼生产过程的影响。

关键词：灰分色值葡聚糖过滤性质量原糖淀粉

Is there a role for surgery in stage ⅢA-N2 non-small cell lung cancer?

在线全文

学校读者我要写书评

暂无评论

中国肺癌杂志 2008年第5期11卷 615-621页

作者： Paul E.VAN SCHIL michèle DE WAELE jeroen m.HENDRIKS Patrick R.LAUWERS Department of Thoracic and Vascular Surgery University of Antwerp

The role of surgery in stage ⅢA-N2 non-small cell lung cancer(NSCLC) remains *** important prognostic factors are mediastinal downstaging and complete surgical *** restaging techniques exist to evaluate response after induction therapy and these are subdivided into non-invasive,invasive and alternative or minimally invasive *** contrast to imaging or functional studies,remediastinoscopy provides pathological evidence of response after induction *** techn...

关键词： Induction therapy Intraoperative compilations Lung neoplasms mediastinoscopy Neoplasm staging Postoperative