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Aerosol jet printing of surface acoustic wave microfluidic devices

Microsystems & Nanoengineering 2024年第1期10卷 231-242页

作者： Joseph Rich Brian cole Teng Li Brandon Lu Hanyu Fu Brittany N.Smith Jianping Xia Shujie Yang Ruoyu Zhong James L.Doherty Kanji Kaneko Hiroaki Suzuki Zhenhua Tian Aaron D.Franklin Tony Jun Huang Department of Biomedical Engineering Duke UniversityDurhamNC 27708USA Department of Electrical and Computer Engineering Duke UniversityDurhamNC 27708USA Department of Mechanical Engineering Virginia Polytechnic Institute and State UniversityBlacksburgVA 24061USA Thomas Lord Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNC 27708USA Deptartment of Precision Mechanics Faculty of Science and EngineeringChuo UniversityTokyo 112-8551Japan Department of Chemistry Duke UniversityDurhamNC 27708USA

The addition of surface acoustic wave(SAW)technologies to microfluidics has greatly advanced lab-on-a-chip applications due to their unique and powerful attributes,including high-precision manipulation,versatility,integrability,biocompatibility,contactless nature,and rapid actuation.However,the development of SAW microfluidic devices is limited by complex and time-consuming micro/nanofabrication techniques and access to cleanroom facilities for multistep photolithography and vacuum-based processing.To simplify the fabrication of SAW microfluidic devices with customizable dimensions and functions,we utilized the additive manufacturing technique of aerosol jet printing.We successfully fabricated customized SAW microfluidic devices of varying materials,including silver nanowires,graphene,and poly(3,4-ethylenedioxythiophene)polystyrene sulfonate(PEDOT:PSS).To characterize and compare the acoustic actuation performance of these aerosol jet printed SAW microfluidic devices with their cleanroom-fabricated counterparts,the wave displacements and resonant frequencies of the different fabricated devices were directly measured through scanning laser Doppler vibrometry.Finally,to exhibit the capability of the aerosol jet printed devices for lab-on-a-chip applications,we successfully conducted acoustic streaming and particle concentration experiments.Overall,we demonstrated a novel solution-based,direct-write,single-step,cleanroom-free additive manufacturing technique to rapidly develop SAW microfluidic devices that shows viability for applications in the fields of biology,chemistry,engineering,and medicine.

关键词： printing wave fluid

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Theoretical Research on a D-band Traveling Wave Extended Interaction Amplifier

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Chinese Journal of Electronics 2024年

作者： Zhongtao CUI Xuesong YUAN Xiaotao XU Dongrui CHEN Yifan ZU Matthew Thomas cole Qingyun CHEN Yang YAN Terahertz Science and Technology Key Laboratory of Sichuan Province School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of China Department of Electronic and Electrical Engineering University of Bath

A traveling-wave, extended interaction amplifier is herein investigated for use in millimeter-wave and terahertz amplification sources. By placing engineered extended interaction cavities between the traveling wave structures, higher gain is obtained with a shorter high frequency circuit, compared with conventional traveling wave tubes architectures. The bandwidth of the device is significantly increased relative to extended interaction klystrons. A Dband beam wave interaction circuit of 26 mm long has been designed. Particle in cell simulations at 21.5 kV operating voltage, 0.3 A beam current, and 5 mW input power show that the maximum output power reaches 351 W, with a gain of 48.4 dB and 3-dB bandwidth of 1.42 GHz.

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中子星——了解高密度物质的窗口

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世界科学 2003年第4期 26-27页

作者： cole miller ,侯春风中科院北京大学化学系

正如其名称所指的那样 ,中子星几乎是由中子构成的。但这些由恒星演化而来的体积极小密度极高的星体的核心却有可能隐含着包括奇异物质在内的新的物质态———

关键词：中子星质量恒星高密度物质

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Accretion in strong field gravity with eXTP

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Science China(Physics,Mechanics & Astronomy) 2019年第2期62卷 45-73页

作者： Alessandra De Rosa Phil Uttley LiJun Gou Yuan Liu Cosimo Bambi Didier Barret Tomaso Belloni Emanuele Berti Stefano Bianchi Ilaria Caiazzo Piergiorgio Casella Marco Feroci Valeria Ferrari Leonardo Gualtieri Jeremy Heyl Adam Ingram Vladimir Karas FangJun Lu Bin Luo Giorgio Matt Sara Motta Joseph Neilsen Paolo Pani Andrea Santangelo XinWen Shu JunFeng Wang Jian-Min Wang YongQuan Xue YuPeng Xu WeiMin Yuan YeFei Yuan Shuang-Nan Zhang Shu Zhang Ivan Agudo Lorenzo Amati Nils Andersson Cristina Baglio Pavel Bakala Altan Baykal Sudip Bhattacharyya Ignazio Bombaci NiccolóBucciantini Fiamma Capitanio Riccardo Ciolfi Wei K.Cui Filippo D'Ammando Thomas Dauser Melania Del Santo Barbara De Marco Tiziana Di Salvo Chris Done Michal Dovciak Andrew C.Fabian Maurizio Falanga Angelo Francesco Gambino Bruce Gendre Victoria Grinberg Alexander Heger Jeroen Homan Rosario Iaria JiaChen Jiang ChiChuan Jin Elmar Koerding Manu Linares Zhu Liu Thomas J.Maccarone Julien Malzac Antonios Manousakis Frédéric Marin Andea Marinucci Missagh Mehdipour Mariano Méndez Simone Migliari cole miller Giovanni Miniutti Emanuele Nardini Paul T.O'Brien Julian P.Osborne Pierre Olivier Petrucci Andrea Possenti Alessandro Riggio Jerome Rodriguez Andrea Sanna LiJing Shao Malgosia Sobolewska Eva Sramkova Abigail L.Stevens Holger Stiele Giulia Stratta Zdenek Stuchlik Jiri Svoboda Fabrizio Tamburini Thomas M.Tauris Francesco Tombesi Gabriel Torok Martin Urbanec Frederic Vincent QingWen Wu Feng Yuan Jean J.M.in't Zand Andrzej A.Zdziarski XinLin Zhou INAF-Istituto di Astrofisica e Planetologie Spaziali Via Fosso del Cavaliere Anton Pannekoek Institute for Astronomy University of Amsterdam National Astronomical Observatories Chinese Academy of Science Institute of High Energy Physics Chinese Academy of Science Center for Field Theory and Particle Physics and Department of Physics Fudan University IRAP Universitéde ToulouseCNRSUPSCNES INAF-Osservatorio Astronomico di Brera Department of Physics and Astronomy The University of MississippiUniversity Dipartimento di Matematica e Fisica Universitàdegli studi Roma Tre University of British Columbia INAF-Osservatorio Astronomico di Roma INFN-Roma 2 c/o Dipartimento di Fisica II Universit?di Roma"Tor Vergata" Dipartimento di Fisica Universitàdegli Studi di Roma"La Sapienza"&Sezione INFN Roma1 Department of Physics University of OxfordClarendon Laboratory Astronomical Institute Academy of Sciences School of Astronomy and Space Science Nanjing University MIT Kavli Institute for Astrophysics and Space Research Institut für Astronomie und Astrophysik Eberhard Karls Universität Department of Physics Anhui Normal University Department of Astronomy and Institute of Theoretical Physics and Astrophysics Xiamen University CAS Key Laboratory for Research in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of China Instituto de Astrofísica de Andalucia(CSIC) Glorieta de la Astronomía s/n INAF-Istituto di Astrofisica Spaziale e Fisica cosmica di Bologna Mathematical Sciences and STAG Research Centre University of Southampton New York University Abu Dhabi Institute of Physics and Research Centre for Computational Physics and Data Processing Faculty of Philosophy&ScienceSilesian University in OpavaíBezru?ovo nám. Department of Physics Middle East Technical University Department of Astronomy and Astrophysics Tata Institute of Fundamental Research Dipartimento di Fisica Universit?di Pisa&INFN INAF-Osservatorio Astrofisico di Arcetri INAF-Osservatorio Astronomico di Padova INFN-TIFPA Trento Ins

In this paper we describe the potential of the enhanced X-ray Timing and Polarimetry(eXTP) mission for studies related to accretion flows in the strong field gravity regime around both stellar-mass and supermassive black-holes. eXTP has the unique capability of using advanced "spectral-timing-polarimetry" techniques to analyze the rapid variations with three orthogonal diagnostics of the flow and its geometry, yielding unprecedented insight into the inner accreting regions, the effects of strong field gravity on the material within them and the powerful outflows which are driven by the accretion process.

关键词： X-ray black holes physics accretion

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从世界到中国:未来素养何以有必要成为未来教育研究的新视点——于金申与未来学家瑞尔·米勒的对话

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华东师范大学学报（教育科学版） 2024年第3期42卷 115-126页

作者：于金申 [法]瑞尔·米勒华东师范大学教育学系上海200062 巴黎高科路桥学校商学院巴黎75012

近些年未来教育已经成为了国际热点话题。但未来尚未发生,谁也无法预测未来教育将会走向何方,因此,我们需要通过新视点来研究未来教育。为此,联合国教科文组织未来素养研究中心前主任瑞尔·米勒研究员提出了未来素养概念,这是一种旨在... 详细信息

近些年未来教育已经成为了国际热点话题。但未来尚未发生,谁也无法预测未来教育将会走向何方,因此,我们需要通过新视点来研究未来教育。为此,联合国教科文组织未来素养研究中心前主任瑞尔·米勒研究员提出了未来素养概念,这是一种旨在帮助人们知道未来是什么以及如何使用未来的能力。近十年,在联合国教科文组织的推动下,未来素养研究已经在全球44个国家和地区开展了100多场未来素养创新实验室活动,探讨了未来素养对于未来教育和社会发展的意义,且正形成全球化发展之势。鉴于此,本对话主要围绕未来素养的学理背景,未来教育研究的可能路径,中国未来教育探索以及对中国未来教育镜鉴价值四个方面展开,以昭示未来素养视点下未来教育研究的方向与路径。

关键词：未来教育未来素养未来素养创新实验室中国未来教育

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未来素养对未来教育的深远意义——李政涛与法国未来学家瑞尔·米勒的对话

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中国远程教育 2024年第6期44卷 25-33页

作者：李政涛瑞尔·米勒中国教育学会教育部中学校长培训中心华东师范大学基础教育改革与发展研究所上海200062 法国巴黎高科路桥学校商学院巴黎75012

未来素养(Futures Literacy)对于未来教育发展具有深远影响。本文借助李政涛与法国未来学家瑞尔·米勒的对话,深入探讨了未来素养的多维议题。作为核心素养的前提,未来素养是人类每个个体都应具备的基础能力。改变未来的关键在于增强人... 详细信息

未来素养(Futures Literacy)对于未来教育发展具有深远影响。本文借助李政涛与法国未来学家瑞尔·米勒的对话,深入探讨了未来素养的多维议题。作为核心素养的前提,未来素养是人类每个个体都应具备的基础能力。改变未来的关键在于增强人们理解想象的能力,进而深化其对世界的认知。这不仅意味着对人类境况的改变,更是要通过识别并超越不同的预期假设,激发个体的自主性想象力。因此,学校系统需要摒弃其固有观念,鼓励和引导学生运用想象力,培养其“运用未来”(Using-the-future)的能力。目前学校与未来研究(Futures Studies)之间的联结还比较有限,需要社会各方更广泛的多维度介入。未来素养实验室(Futures Literacy Laboratories,FLL)作为研究新工具,能有效揭示参与者的预期假设,助力未来素养的培育。我国上海和成都已经初步积累FLL的独特经验,下一步拟通过构建跨学科研究平台、创新教学法以及优化学习流程来推动未来素养教育在中国教育领域的蓬勃发展。

关键词：未来研究预期学未来素养未来素养实验室未来教育

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Coupler force and fatigue assessments with stochasticdraft gear frictions

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Journal of Traffic and Transportation Engineering(English Edition) 2023年第1期10卷 1-12页

作者： Qing Wu Colin cole Maksym Spiryagin Centre for Railway Engineering Central Queensland UniversityRockhamptonQLD 4701Australia

Train dynamics and component fatigue assessments are important steps towards successful operations of long heavy haul trains.Longitudinal train dynamics(LTD)simulation is an effective and efficient approach in this regard.Draft gear friction has been known to have a strong stochastic feature.However,relevant train dynamics simulations have not been reported in open literature.This paper uses experimental data to extract the stochastic feature of draft gear friction.The stochastic feature is then introduced into LTD simulations.Coupler force and fatigue damage assessments were conducted by simulating a heavy haul train that has 244 vehicles and weighs nearly 30,000 tonnes.The results show that average in-train force variations due to stochastic friction were 55 and 40 kN for the traction and air brake cases respectively;maximum force variations were 207 and 98 kN for the traction and air brake cases respectively.Coupler fatigue calculations are even more sensitive to stochastic draft gear friction;the largest variations can be up to 700 times different due to the strong nonlinearity of fatigue calculation procedures.Stochastic friction is an unavoidable nature in friction draft gears.Simulations using stochastic draft gear friction can deliver results that are more robust and reliable.

关键词： Stochastic friction Draft gear Train dynamics Coupler fatigue Laboratory testing

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The national major trauma system within the United Kingdom: inclusive regionalized networks of care

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Emergency and Critical Care Medicine 2022年第2期2卷 76-79页

作者： Elaine cole Centre for Trauma Sciences Blizard InstituteBarts and the London School of Medicine and DentistryQueen MaryUniversity of LondonLondonEngland

The United Kingdom has a population of 67 million people and is divided into 4 nations:England,Wales,Scotland,and the North of Ireland.Healthcare is provided free to all within each nation via the National Health Service(NHS),which is funded by taxes and national insurance payments.Each year,there are approximately 22,000 casesof“major trauma”in the UK across the four nations.Prior to 2010,trauma patients in the UK were managed at any acute hospital with an Emergency Department,irrespective of resource availability or clinical experience and expertise.In the late 2000s,national reports identified significant variation or serious failings in the organization of UK trauma care.These reports,together with political drivers for centralized services,led to the formation of the national major trauma system made up of regional trauma networks.England was the first nation to implement the systemin 2012 and this re-organization of major trauma care was asso ciated with a 19% increase in the odds of survivalfor patients who reached hospital alive.This paper will provide an overview of the positive attributes and challenges within 6 key components of the national trauma system:pre-hospital care,facility-based care,trauma networks,the trauma registries,rehabilitation and governance,financing,and quality assurance.

关键词： Inclusive Major trauma center Trauma network Trauma system Trauma unit

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Recent advances in wheel–rail RCF and wear testing

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摩擦:英文版 2023年第12期11卷 2181-2203页

作者： Sundar SHRESTHA Maksym SPIRYAGIN Esteban BERNAL Qing WU Colin cole Centre for Railway Engineering Central Queensland UniversityRockhampton 4701Australia Australasian Centre for Rail Innovation Canberra 2601Australia

The wear and rolling contact fatigue (RCF) testing approaches for wheels and rails have been reviewedand evaluated in this study. The study points out the advantages and limitations of the existing approaches. Thebroad analysis revealed that scaled laboratory-based wear testing is widely applied. However, it is necessary topredetermine the input parameters and observing parameters for scaled wear testing for three reasons: first, toemulate the real-world scenarios as closely as possible;second, to postprocess the results received from the scaledtesting and transfer them into real practice at full scale;third, to present the results in a legible/appropriate format.Therefore, most of the important parameters required for wear testing have been discussed with fundamental andsystematic explanations provided. Additionally, the transition of the parameters from the real-world into the testdomain is explained. This study also elaborates on the challenges of the RCF and wear testing processes andconcludes by providing major considerations toward successful testing.

关键词： wear testing rolling contact fatigue(RCF)testing wheel-rail

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Intramedullary bone pedestal formation contributing to femoral shaft fracture nonunion:A case report and review of the literature

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World Journal of Orthopedics 2022年第5期13卷 528-537页

作者： Charles B Pasque Alexander J Pappas Chad A cole Jr Department of Orthopaedic Surgery and Rehabilitation University of Oklahoma College of MedicineOklahoma CityOK 73104United States University of Colorado School of Medicine AuroraCO 80045United States

BACKGROUND Femoral shaft fracture is a commonly encountered orthopedic injury that can be treated operatively with a low overall delayed/nonunion rate.In the case of delayed union after antegrade or retrograde intramedullary nail fixation,fracture dynamization is often attempted first.Nonunion after dynamization has been shown to occur due to infection and other aseptic etiologies.We present a unique case of diaphyseal femoral shaft fracture nonunion after dynamization due to intramedullary cortical bone pedestal formation at the distal tip of the nail.CASE SUMMARY A 37-year-old male experienced a high-energy trauma to his left thigh after coming down hard during a motocross jump.Evaluation was consistent with an isolated,closed,left mid-shaft femur fracture.He was initially managed with reamed antegrade intramedullary nail fixation but had continued thigh pain.Radiographs at four months demonstrated no evidence of fracture union and failure of the distal locking screw,and dynamization by distal locking screw removal was performed.The patient continued to have pain eight months after the initial procedure and 4 mo after dynamization with serial radiographs continuing to demonstrate no evidence of fracture healing.The decision was made to proceed with exchange nailing for aseptic fracture nonunion.During the exchange procedure,an obstruction was encountered at the distal tip of the failed nail and was confirmed on magnified fluoroscopy to be a pedestal of cortical bone in the canal.The obstruction required further distal reaming.A longer and larger diameter exchange nail was placed without difficulty and without a distal locking screw to allow for dynamization at the fracture site.Post-operative radiographs showed proper fracture and hardware alignment.There was subsequently radiographic evidence of callus formation at one year with subsequent fracture consolidation and resolution of thigh pain at eighteen months.CONCLUSION The risk of fracture nonunion caused by intramedullary bone pedestal formation can be mitig

关键词： Nonunion Femoral shaft fracture Diaphysis Fracture fixation Antegrade intramedullary nail Case report

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