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The impact of prehospital blood sampling on the emergency department process of patients with chest pain:a pragmatic non-randomized controlled trial

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World Journal of Emergency Medicine 2023年第4期14卷 257-264页

作者： johan L.van Nieuwkerk M.Christien van der Linden Rolf J.Verheul Merel van Loon-van Gaalen Marije Janmaat Naomi van der Linden Emergency Department Haaglanden Medical Centre&Emergency Medical Services Haaglandenthe Hague 2501 CBthe Netherlands Research and Development Haaglanden Medical Centrethe Hague 2501 CKthe Netherlands Laboratory Services Haaglanden Medical Centrethe Hague 2501 CKthe Netherlands Emergency Department Haaglanden Medical Centrethe Hague 2501 CKthe Netherlands Faculty of Health University of Applied Sciences LeidenLeiden 2300 AJthe Netherlands Faculty of Technology Policy and ManagementDelft University of TechnologyDelft 2628 BXthe Netherlands

BACKGROUND:In patients with chest pain who arrive at the emergency department(ED)by ambulance,venous access is frequently established prehospital,and could be utilized to sample *** blood sampling may save time in the diagnostic *** this study,the association of prehospital blood draw with blood sample arrival times,troponin turnaround times,and ED length of stay(LOS),number of blood sample mix-ups and blood sample quality were ***:The study was conducted from October 1,2019 to February 29,*** patients who were transported to the ED with acute chest pain with low suspicion for acute coronary syndrome(ACS),outcomes were compared between cases,in whom prehospital blood draw was performed,and controls,in whom blood was drawn at the *** analyses were used to assess the association of prehospital blood draw with the time ***:Prehospital blood draw was performed in 100 *** 406 patients,blood draw was performed at the *** blood draw was independently associated with shorter blood sample arrival times,shorter troponin turnaround times and decreased LOS(P0.05).CONCLUSION:For patients with acute chest pain with low suspicion for ACS,prehospital blood sampling is associated with shorter time intervals,while there were no significant differences between the two groups in the validity of the blood samples.

关键词： Blood specimen collection Crowding Emergency medical services Troponin

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Economic overview of a two-agent process for underground coal gasification with Fischer-Tropsch- based poly-generation

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Clean Energy 2019年第1期3卷 34-46页

作者： johan F.Brand johan C.van Dyk Frans B.Waanders African Carbon Energy PO Box 450Standerton 2430South Africa Centre of Excellence in Carbon-based Fuels North-West UniversityPotchefstroom 2520South Africa African Carbon Energy PO Box 254SasolburgSouth Africa

Underground Coal Gasification(UCG)is a mining-gasification process that produces synthesis gas from in situ coal by injecting air(or oxygen and steam)and extracting the produced gas via *** resulting synthesis gas(‘syngas’)produced by UCG can be used directly as a fuel-gas or deep-cleaned to produce many other products like chemicals,liquid fuels,hydrogen and synthetic natural *** has significant environmental,safety and practical advantages over conventional coal mining and utilization,foremost being cost and emissions *** South Africa,facilities of an industrial-scale Fischer-Tropsch(FT)have been operating for decades on coal-to-liquid and gas-to-liquid ***-blown UCG produces syngas,which contains a mixture of carbon monoxide(CO)and hydrogen,and these molecules can be conditioned to serve as feed for synthetic-crude-oil(‘syncrude’)conversion technologies based on the FT *** Carbon Energy(Pty)Ltd.(Africary)completed a study integrating its UCG technology with mini gas-to-liquids *** from Africary’s Theunissen Underground Coal Gasification(TUCG)project will be used for power production and synthesis of liquid fuels in a unique poly-generation *** TUCG process will consist of two parallel gasifiers,operated on different agents,making the component parts of UCG and coal-to-(any product)(CtX)tightly linked and interdependent,but reducing both cost and ***-CtX offers a lower capital investment to conventional underground mining and surface gasification due to the removal of the surface gasifier and coal-mine *** gas clean-up systems will remove undesirable components from each gasifier and blend the cleaned syngas for H2:CO ratio control and provide implementation of carbon capture and *** study has minimized the complexity and optimized the process flow to provide own-use electricity and about 4000 barrels/day equivalent fuels at a capital cost estimate(2017)of

关键词： underground coal gasification Fischer-Tropsch coal to liquids gas to liquids CCS UCG FT LNG CtX economic study South Africa

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Bimetallic NiCo boride nanoparticles confined in a MXene network enable efficient ambient ammonia electrosynthesis

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Journal of Energy Chemistry 2023年第2期77卷 469-478,I0012页

作者： Chuang Wang Qin-Chao Wang Ke-Xin Wang Michiel De Ras Kaibin Chu Liang-Liang Gu Feili Lai Sheng-You Qiu Hele Guo Peng-Jian Zuo johan Hofkens Xiao-Dong Zhu School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina State Key Laboratory Base of Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science&TechnologyQingdao 266042ShandongChina Department of Chemistry KU LeuvenLeuven 3001Belgium Max Planck Institute for Polymer Research 55128 MainzGermany School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002JiangsuChina

Ambient electrocatalytic nitrogen fixation is an emerging technology for green ammonia synthesis,but the absence of optimized,stable and performant catalysts can render its practical application ***,bimetallic NiCo boride nanoparticles confined in MXene are shown to accomplish highperformance nitrogen reduction *** king advantage of the synergistic effect in specific compositions with unique electronic d and p orbits and typical architecture of rich nanosized particles embedded in the interconnected conductive network,the synthesized MXene@NiCoB composite demonstrates extensive improvements in nitrogen molecule chemisorption,active area exposure and charge *** a result,optimal NH3 yield rate of 38.7μg h^(-1) mgcat^(-1).and Faradaic efficiency of 6.92%are acquired in0.1 M Na_(2)SO_(4) ***,the great catalytic performance can be almost entirely maintained in the cases of repeatedly-cycled and long-term *** investigations reveal that the nitrogen reduction reaction on MXene@NiCoB catalyst proceeds according to the distal pathway,with a distinctly-reduced energy barrier relative to the Co2B *** work may inspire a new route towards the rational catalyst design for the nitrogen reduction reaction.

关键词： Nitrogen reduction reaction Electrocatalyst MXene Boride Ammonia

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基于合成维度空间中深亚波长拓扑角态的声彩虹捕获

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Science Bulletin 2023年第16期68卷 1744-1747,M0003页

作者：廖丹薇刘翊贤张志旺程营刘晓峻 johan Christensen Department of Physics MOE Key Laboratory of Modern AcousticsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190China College of Aerospace Engineering Chongqing UniversityChongqing 400044China IMDEA Materials Institute Madrid 28906Spain

近年来,拓扑声学相关研究发展迅猛,其理论最初源于凝聚态物理中所发现的拓扑特性.其中,声学高阶拓扑绝缘体支持能量高度局域在拐角处的低维拓扑角态,且本征频率简并.然而,如何打破拓扑角态的多重简并,实现可调控的频率分布并设计新型声... 详细信息

近年来,拓扑声学相关研究发展迅猛,其理论最初源于凝聚态物理中所发现的拓扑特性.其中,声学高阶拓扑绝缘体支持能量高度局域在拐角处的低维拓扑角态,且本征频率简并.然而,如何打破拓扑角态的多重简并,实现可调控的频率分布并设计新型声学多功能拓扑器件,是亟待解决的关键问题.在该研究中,通过对二维声子晶体中的单元施加平移形变,与真实空间自由度相结合构建四维合成空间.研究发现,随着平移形变自由度的调制,Zak相位连续变化,而合成空间的非零拓扑不变量确保了系统的非平庸拓扑特性,拓扑角态的频率简并被打破.基于此结论,进一步设计了基于合成维度的声学高阶拓扑绝缘体阵列,以实现局域在深亚波长拐角上的双通道声彩虹捕获.实验结果表明,不同通道上声彩虹拓扑角态的本征频率增加方向相反,在空间选择性能量捕获等领域具有潜在的应用前景.

关键词：拓扑绝缘体本征频率拓扑特性凝聚态物理能量高度空间选择性空间自由度能量捕获

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Exhuming Asia-A thermochronological perspective： Preface

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Geoscience Frontiers 2016年第2期7卷 153-154页

作者： Stijn Glorie johan De Grave Centre for Tectonics Resources and Exploration(TRaX)Department of Earth SciencesSchool of Physical SciencesThe University of AdelaideAdelaideSA 5005Australia Department of Geology &Soil Science MINPET GroupGhent University281-S8 KrijgslaanGhent 9000Belgium

Asia is the largest continent on Earth and records a prolonged history of continental growth and tectonic reactivation during the Phanerozoic. Several tectonic forces at the continental palaeomargins induced mountain building, both at the margins themselves （e.g. the Himalayas） and into the continental interior （e.g. the Tianshan）.

关键词： Asia Exhuming Asia-A thermochronological perspective

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Distributed attitude synchronization using backstepping and sliding mode control

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Control Theory and Technology 2014年第1期12卷 48-55页

作者： johan THUNBERG Wenjun SONG Yiguang HONG Xiaoming HU KTH Royal Institute of Technology S-100 44 Stockholm Sweden Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

We consider the problem of attitude synchronization for systems of rigid body agents with directed topologies. Two different scenarios for the rotation matrices of the agents are considered. In the first scenario, the rotations are contained in a convex subset of SO（3）, which is a ball of radius less than π/2, whereas in the second scenario the agents are contained in a subset of SO（3）, which is a ball of radius less than ~. Using a control law based on backstepping and sliding mode control, we provide distributed, semi-global, torque control laws for the agents so that the rotations asymptotically synchronize. The control laws for the agents in the first scenario only depend on the relative rotations between neighboring agents, whereas the control laws in the second scenario depend on rotations defined in a global coordinate frame, lllustrative examples are provided where the synchronization is shown for both scenarios.

关键词： Attitude synchronization Distributed control Multi-agent systems

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Mapping of decentralised photovoltaic and solar thermal systems by remote sensing aerial imagery and deep machine learning for statistic generation

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Energy and AI 2023年第4期14卷 559-577页

作者： johan Lindahl Robert johansson David Lingfors Becquerel Sweden AB SE-74142 KnivstaSweden Department of Engineering Sciences Uppsala UniversitySE-75121 UppsalaSweden

As a mean to monitor the rapid expansion of the highly decentralized PV market,identifying solar energy systems in aerial imagery by deep machine learning,is a research field that is getting increasing *** general challenge in the field is to create testing data of high quality that are representative of the end-use *** this study we use the open source convolutional neural network developed within the DeepSolar project and apply it in the country of Sweden,for the purpose of generating market statistics,by scanning three complete municipalities for small decentralized photovoltaic and solar thermal *** evaluation of the performance is done against a highly accurate ground truth,which was created by cross-checking the classification results with the inventory of the local distribution system operators and the database of photovoltaic systems that have received a capital subsidy in Sweden,and combining that with physical onsite inspections.A process of generate additional training data and re-training the algorithm after each municipality scan was developed,which suc-cessively improved the accuracy,resulting in that 95%of all detectable photovoltaic,excluding building inte-grated and vertical systems,and 80%of all detectable solar thermal systems were correctly identified in the last municipality *** accurate ground truth allowed a quantification of why some systems are not *** generated dataset of solar energy systems could be connected to existing building and property inventories,which allowed creation of market segment statistics with remarkably high detail information.

关键词： Photovoltaics Solar thermal Aerial imagery Remote sensing Object recognition Convolutional neural networks

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Collaboration Exercises——The Lack of Collaborative Benefits

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International Journal of Disaster Risk Science 2014年第3期5卷 192-205页

作者： johan M.Berlin Eric D.Carlstrom Department of Social and Behavioral Studies University West46186 TrollhattanSweden Sahlgrenska Academy Institute of Health and Care SciencesUniversity of Gothenburg40530 GothenburgSweden

The purpose of this article is to analyze what professional emergency personnel learn during collaboration exercises and the benefits of what they have ***(n = 19) and semistructured interviews(n = 32) were carried out in conjunction with major exercises held in Sweden(2007–2012). The results show that exercises tend to be based on their own logic, which differs from actual events. Exercise participants believe that they mainly learn single-track, parallel, and pathdependent behavior. The exercises do not facilitate the use of cross-boundary activities. This means that learning, as well as benefits from the exercises for actual events, is limited. The exercises would be more appropriate if those participating had the opportunity to identify weaknesses,try alternative ways, and engage in comprehensive organizational analyses at the conclusion of the *** on the results of the study, alternative models for collaboration exercises are suggested, with elements that would better develop collaboration and contribute to learning.

关键词： Ambulance Collaboration exercises Emergency personnel Police Rescue services Sweden

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Creating Location Services for the Wireless Web

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2002年

作者： johan Hjelm

来源：畅想之星图书光盘版（南... 评论

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Interspecific comparison of the flight performance between sparrowhawks and common buzzards migrating at the Falsterbo peninsula： A radar study

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Current Zoology 2014年第5期60卷 670-679页

作者： Gintaras MALMIGA Cecilia NILSSON johan BACKMAN Thomas ALERSTAM Department of Biology Lund University SE-22362 Lund Sweden

In order to compare the two species’ flight performance over the exposed and windy Falsterbo Peninsula, where thermal conditions seldomly are very favorable, we used tracking radar to study flight parameters of sparrowhawksAccipiter ni-susand common buzzardsButeo buteoduring autumn migration. The results showed a clear difference between sparrowhawks and common buzzards in their flight altitudes and speeds, and in the wind conditions they encountered. Common buzzards had higher flight altitudes and were more selective of wind. Flight altitude was negatively related to the wind speed, which was most pronounced for common buzzards. Sparrowhawks had higher mean air- and cross-country speeds than common buzzards. Airspeed was negatively related, whereas ground and cross-country speeds were positively related to the tailwind component for both raptors. The differences between sparrowhawks and buzzards could to a large degree be explained by a larger dependence on thermal soaring among the common buzzards; a strategy associated with selectivity for favourable thermal and wind conditions during migratory flight. An additional important explanation for the interspecific differences was the habit of the sparrowhawks to combine migratory flight with hunting for prey, which makes it prone to fly at lower altitudes and use flapping flight to a much larger degree than common buzzards which do not forage during their migratory passage of the Falsterbo Peninsula.

关键词：飞行性能迁移过程跟踪雷达雀鹰飞行高度低海拔地区速度比飞行参数

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