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Prospective evaluation of point-of-care ultrasound for pre-procedure identification of landmarks versus traditional palpation for lumbar puncture

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World Journal of Emergency Medicine 2016年第3期7卷 173-177页

作者： shadi lahham priel schmalbach sean p.wilson lori ludeman mohammad subeh jocelyn chao nadeem albadawi niki mohammadi john c.fox Emergency Medicine University of California Irvine Orange California 92868 USA

BACKGrOUND: The objective of this study is to determine if point-of-care ultrasound(POCUS) pre-procedure identification of landmarks can decrease failure rate, reduce procedural time, and decrease the number of needle redirections and reinsertions when performing a lumbar puncture(LP).METHODS: This was a prospective, randomized controlled trial comparing POCUS preprocedure identifi cation of landmarks versus traditional palpation for LP in a cohort of patients in the emergency department and intensive care ***: A total of 158 patients were enrolled. No signifi cant difference was found in time to completion, needle re-direction, or needle re-insertion when using POCUS when compared to the traditional method of ***: Consistent with fi ndings of previous studies, our data indicate that there was no observed benefi t of using POCUS to identify pre-procedure landmarks when performing an LP.

关键词： Ultrasound Lumbar puncture Spinal tap

基于数据融合的中国东部降水氢稳定同位素数据集

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中国科学：地球科学 2024年第9期54卷 3023-3039页

作者：陈佳澄陈杰 Xunchang john ZHANG 彭培艺武汉大学水资源工程与调度全国重点实验室武汉430072 武汉大学海绵城市建设水系统科学湖北省重点实验室武汉430072 USDA-ArS Oklahoma and Central Plains Agricultural research Center El Reno OK 73036USA 重庆交通大学西南水利水运工程科学研究院重庆400016

降水氢稳定同位素在气候和水文研究中是一种有效的环境示踪剂.然而,中国目前仍然缺乏高精度的降水氢同位素数据.本研究使用基于卷积神经网络(CNN)的数据融合方法,将观测和引入同位素的大气环流模式(iGCM)模拟的氢同位素组成进行融合,建... 详细信息

降水氢稳定同位素在气候和水文研究中是一种有效的环境示踪剂.然而,中国目前仍然缺乏高精度的降水氢同位素数据.本研究使用基于卷积神经网络(CNN)的数据融合方法,将观测和引入同位素的大气环流模式(iGCM)模拟的氢同位素组成进行融合,建立了中国东部地区1969~2017年降水氢同位素数据集.该数据集的时间分辨率为逐月,空间分辨率为50~60km.在构建数据集之前,比较了三种数据融合方法和两种偏差校正方法的性能.结果表明,基于CNN的融合方法表现最好(与观测数据的相关系数大于0.90,均方根误差小于10.5‰),误差反向传播神经网络和长短期记忆人工神经网络的表现相近,且优于偏差校正方法.因此,使用CNN方法建立数据集并基于此分析了中国东部降水氢同位素的时空分布特征.数据集的降水氢同位素分布与观测数据分布相似,在空间上与北方地区的温度效应和南方地区的降水量效应一致,时间序列变化趋势与降水和气温的观测变化趋势一致.综上所述,构建的数据集能较好地再现观测数据,且具有时间连续和空间相对规则的特点,能为追踪大气和水文过程提供有效的数据支撑.

关键词：降水稳定同位素大气环流模式数据融合数据集

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奋进！领导力

奋进！领导力

2020年

作者： (加)魏子安(john Weston)

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通讯电子学上

通讯电子学上

Investigation of Coronavirus Deposition in realistic Human Nasal Cavity and Impact of Social Distancing to Contain COVID-19:A Computational Fluid Dynamic Approach

1981年

作者： Dennis roddy john Coolen原许明全译

来源：汇雅图书（南通市图书馆... 评论

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汇雅图书（南通市图书馆）

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Computer Modeling in Engineering & Sciences 2020年第12期125卷 1185-1199页

作者： Mohammad Zuber john Valerian Corda Milad Ahmadi BSatish Shenoy Irfan Anjum Badruddin Ali E.Anqi Kamarul Arifin Ahmad S.M.Abdul Khader Leslie Lewis Mohammad Anas Khan Sarfaraz Kamangar Department of Aeronautical&Automobile Engineering Manipal Institute of TechnologyManipal Academy of Higher EducationManipal576104India Department of Mechanics of Solids Surfaces and SystemsFaculty of Engineering TechnologyUniversity of TwenteEnschede7522The Netherlands Mechanical Engineering Department College of EngineeringKing Khalid UniversityAbha61421Saudi Arabia Department of Aerospace Engineering Universiti Putra MalaysiaSerdang43400Malaysia Department of Mechanical and manufacturing Engineering Manipal Institute of TechnologyManipal Academy of Higher EducationManipal576104India Department of Paediatrics Kasturba Medical College&HospitalManipal576104India Department of Mechanical Engineering Jamia Millia IslamiaDelhi110025India

The novel coronavirus responsible for COVID-19 has spread to several countries within a considerably short *** virus gets deposited in the human nasal cavity and moves to the lungs that might be *** per safety guidelines by theWorld Health Organization(WHO),social distancing has emerged as one of the major factors to avoid the spread of ***,different guidelines are being followed across the countries with regards to what should be the safe ***,the current work is an attempt to understand the virus deposition pattern in the realistic human nasal cavity and also to find the impact of distance that could be termed as a safety *** study is performed usingComputationalFluid Dynamics as a solution tool to investigate the impact of COVID-19 deposition(i)On a realistic 3D human upper airway model and(ii)2D social distancing protocol for a distance of 0.6,1.2,1.8,and 2.4 *** results revealed that the regional deposition flux within the nasal cavity was predominantly observed in the external nasal cavity and nasopharyngeal *** flushing of these regions with saltwater substitutes can limit contamination in healthy *** safe distancing limit estimated with 1 m/s airflow was about 1.8 *** extensive deposition was observed for distances less than 1.8 m in this study,emphasizing the fact that social distancing advisories are not useful and do not take into account the external dynamics associated with airflow.

关键词： COVID-19 upper respiratory tract virus deposition social distancing

Windows排困解难DIY 系统操作防护篇

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维普期刊数据库

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Species-specific,pan-European diameter increment models based on data of 2.3 million trees

丛书名：电脑DIY系列

2000年

作者：程秉辉 john Hawke 卢扬江帆改编

本书内容包括：Windows安装的困惑与迷思、千奇百怪的系统问题、桌面、操作与程序问题。

ISBN: (纸本)7500640358

本书内容包括：Windows安装的困惑与迷思、千奇百怪的系统问题、桌面、操作与程序问题。

关键词：基本知识窗口软件

来源：畅想之星图书光盘版（南... 评论

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Forest Ecosystems 2018年第3期5卷 277-295页

作者： mart-Jan Schelhaas Geerten M Hengeveld Nanny Heidema Esther Thurig Brigitte rohner Giorgio Vacchiano Jordi Vayreda john redmond Jaroslaw Socha Jonas Fridman Stein Tomter Heino Polley Susana Barreiro Gert-Jan Nabuurs Wageningen University and research Wageningen Environmental Research(WENR)Droevendaalsesteeg 36708PB WageningenThe Netherlands Wageningen University and research BiometrisDroevendaalsesteeg 16708PB WageningenThe Netherlands Wageningen University and research Forest and Nature Conservation Policy GroupDroevendaalsesteeg 36708PB WageningenThe Netherlands Swiss Federal Institute for Forest Snow and Landscape Research WSLResource AnalysisZuercherstrasse 111CH-8903 BirmensdorfSwitzerland European Commission Joint Research CentreDirectorate DSustainable Resources-Bio-Economy UnitIspraItaly CrEAF 08193 Cerdanyola del VallesSpain Univ Autonoma Barcelona 08193 Cerdanyola del VallesSpain Forest Service Department of AgricultureFood and the MarineJohnstown Castle EstateCo.WexfordIreland Department of Biometry and Forest Productivity Institute of Forest Resources ManagementFaculty of ForestryUniversity of Agriculture in KrakowAI.29Listopada 4631-425CracowPoland Swedish University of Agricultural Sciences (SLU) 90183 UmeaSweden Norwegian Institute of Bioeconomy research P.O.Box 115N-143 1AsNorway Thunen Institute Institute of Forest EcosystemsAlfred-Mo1ler-Strabe 1Haus41/4216225 EberswaldeGermany Forest research Centre (CEF) Instituto Superior de AgronomiaUniversidade de LisboaTapada da Ajuda1349-017Lisbon.Portugal Wageningen University and research Forest Ecology and Forest Management GroupDroevendaalsesteeg 36708PBWageningenThe Netherlands

Background: Over the last decades, many forest simulators have been developed for the forests of individual European countries. The underlying growth models are usually based on national datasets of varying size, obtained from National Forest Inventories or from long-term research plots. many of these models include country-and location-specific predictors, such as site quality indices that may aggregate climate, soil properties and topography effects. Consequently, it is not sensible to compare such models among countries, and it is often impossible to apply models outside the region or country they were developed for. However, there is a clear need for more generically applicable but still locally accurate and climate sensitive simulators at the European scale, which requires the development of models that are applicable across the European continent. The purpose of this study is to develop tree diameter increment models that are applicable at the European scale, but still locally accurate. We compiled and used a dataset of diameter increment observations of over 2.3 million trees from 10 National Forest Inventories in Europe and a set of 99 potential explanatory variables covering forest structure, weather, climate, soil and nutrient ***: Diameter increment models are presented for 20 species/species groups. Selection of explanatory variables was done using a combination of forward and backward selection methods. The explained variance ranged from10% to 53% depending on the species. Variables related to forest structure(basal area of the stand and relative size of the tree) contributed most to the explained variance, but environmental variables were important to account for spatial patterns. The type of environmental variables included differed greatly among ***: The presented diameter increment models are the first of their kind that are applicable at the European scale. This is an important step towards the development of a new ge

关键词： European forests Diameter increment model Climate change Growth modelling National forest inventory

Applied Atmospheric Dynamics 1

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