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Journal of Intensive Medicine 2023年第4期3卷 373-375页

作者： Audrey Graser Anne Bauters Jean-Luc Auffray Caroline Vayne françois Provot Merce Jourdain Laurent Robriquet Department of Intensive Care Medicine CHU LilleLille F-59000France Service d'Hémostase-Transfusion Institut d'HématologieCentre de Biologie Pathologie GénétiqueBoulevard du Professeur Jules LeclercqCentre Hospitalier Universitaire de LilleLille 59037France Service de Cardiologie Institut Coeur PoumonBoulevard du Professeur Jules LeclercqCentre Hospitalier Universitaire de LilleLille 59037France Service d'Hématologie-Hémostase Centre Hospitalier Universitaire de ToursUniversitéde ToursTours EA4245 T2IFrance Pôle de Néphrologie Hôpital Albert CalmetteBoulevard du Professeur Jules LeclercqCentre Hospitalier Universitaire de LilleLille 59037France Department of Intensive Care Medicine Univ LilleInsermCHU LilleLille F-59000France

Introduction Heparin-induced thrombocytopenia(HIT)is a rare but life-threatening complication of heparin *** IgG antibodies recognize heparin-modified platelet factor 4(PF4/H IgG)and activate the platelets,increasing ... 详细信息

关键词： heparin antibodies thrombocytopenia

Characterization of Particle Emissions of Turbocharged Direct Injection Gasoline Engine in Transients and Hot Start Conditions

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Journal of Thermal Science 2021年第6期30卷 2056-2070页

作者： Vincent BERTHOME David CHALET Jean-françois HETET Ecole Centrale de Nantes LHEEA Lab.(ECN/CNRS)Nantes 44300France

Reducing pollutant emissions,particularly soot particles emitted by internal combustion engines,is a major challenge for car *** this paper,the experimental setup is a turbocharged three-cylinders gasoline direct injection engine installed on a HORIBA dynamic test driven by a HORIBA STARS *** particle-measuring device is a Pegasor Particles Sensor that measures the current carried by previously electrically charged *** hot engine stabilized tests,with lambda parameter lower or equal to one,have very low emission levels,unlike dynamic *** a consequence,the present paper deals with experiments in transient *** diesel engine,cycle tests show that particulate emissions vary *** understand the phenomenon,a simple transient was created and reproduced a hundred times in order to obtain enough data to analyze and compare these different *** transient starts from idle to reach the speed of 2000 r/min and 60 N·m in 5 *** reach this point,it is necessary to stay in full load for about 3 *** maximum deviations of particles reaches 85%with the standard deviationσ=18%.The cylinder pressure sensor shows significant variations at the very beginning of each transient,i.e.,during the first 500 *** kind of result was observed for Worldwide harmonized Light vehicles Test Cycles(WLTC)with a maximum deviations of particles reaching 75%withσ=30%,on Real Drive Emissions Cycle(RDE)with a maximum deviations of particles reaching 45%withσ=22%and for a 300 s Mini-Cycle with a maximum deviations of particles reaching 70%withσ=17%.The Mini-cycle is made up of the five largest accelerations of the WLTP cycle.A complete analysis highlights the importance of filling the first engine *** depends on the opening speed of the throttle,the position of the crankshaft at the beginning of the transient,and the acceleration of the first ***,the NO_(x) sensor shows very slight variations between each *** a consequence,i

关键词： particles gasoline engine cycle-to-cycle variations transients oil consumption

Metabolic and performance responses of male runners wearing 3 types of footwear: Nike Vaporfly 4%, Saucony Endorphin racing flats, and their own shoes

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Journal of Sport and Health Science 2022年第3期11卷 275-284页

作者： Kim Hébert-Losier Steven J.Finlayson Matthew W.Driller Blaise Dubois Jean-françois Esculier Christopher Martyn Beaven Division of Health EngineeringComputing and ScienceTe Huataki Waiora School of HealthUniversity of WaikatoMount MaunganuiTauranga 3116New Zealand Sport and Exercise Science School of Allied HealthHuman Services and SportLa Trobe UniversityMelbourneVIC 3086Australia Research&Development the Running ClinicLac-BeauportQC G3B 2J8Canada

Purpose We compared running economy(RE)and 3-km time-trial(TT)variables of runners wearing Nike Vaporfly 4%(VP4),Saucony Endorphin lightweight racing flats(FLAT),and their habitual running(OWN)*** Eighteen male recreational runners(age=33.5±11.9 year(mean±SD),peak oxygen uptake(VO_(2peak))=55.8±4.4 mL/kg·min)attended 4 sessions approximately 7 days *** first session consisted of a VO_(2peak) test to inform subsequent RE speeds set at 60%,70%,and 80%of the speed eliciting *** subsequent sessions,treadmill RE and 3-km TTs were assessed in the 3 footwear conditions in a randomized,counterbalanced crossover *** Oxygen consumption(mL/kg·min)was less in VP4(from 4.3%to 4.4%,p≤0.002)and FLAT(from 2.7%to 3.4%,p≤0.092)*** across intensities,with a non-significant difference between VP4 and FLAT(1.0%-1.7%,p≥0.292).Findings related to energy cost(W/kg)and energetics cost of transport(J/kg·m)were ***43-km TT performance(11:07.6±0:56.6 mm:ss)was enhanced *** by 16.6 s(2.4%,p=0.005)and *** by 13.0 s(1.8%,p=0.032).The 3-km times between OWN and FLAT(0.5%,p=0.747)were *** runners(n=11,61%)ran their fastest TT in *** Overall,VP4 improved laboratory-based RE measures in male recreational runners at relative speeds compared to OWN,but the RE improvements in VP4 were not significant *** runners exhibited better treadmill TT performances in VP4(61%)***(22%)and OWN(17%).The variability in RE(-10.3%to 13.3%)and TT(-4.7%to 9.3%)improvements suggests that responses to different types of shoes are individualized and warrant further investigation.

关键词： Footwear Individual responses Minimalist Physiology Running

Bacterial nanocellulose production and biomedical applications

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The Journal of Biomedical Research 2021年第4期35卷 310-317页

作者： françois Barja Microbiology Unit Department of Botany and Plant BiologyUniversity of Geneva1211 Genève-4Switzerlan

Bacterial nanocellulose(BNC)is a homopolymer ofβ-1,4 linked glycose,which is synthesized by Acetobacter using simple culturing methods to allow inexpensive and environmentally friendly small-and large-scale *** on the growth media and types of fermentation methods,ultra-pure cellulose can be obtained with different physio-chemical *** biosynthesis,bacterial cellulose is assembled in the medium into a nanostructured network of glucan polymers that are semitransparent,mechanically highly resistant,but soft and elastic,and with a high capacity to store water and exchange ***,generally recognized as safe as well as one of the most biocompatible materials,has been found numerous medical applications in wound dressing,drug delivery systems,and implants of heart valves,blood vessels,tympanic membranes,bones,teeth,cartilages,cornea,and urinary tracts.

关键词： bacterial nanocellulose bacterial cellulose biomedical applications

Dynamic impact protective body armour:A comprehensive appraisal on panel engineering design and its prospective materials

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Defence Technology（防务技术） 2021年第6期17卷 2027-2049页

作者： Mulat Alubel Abtew françois Boussu Pascal Bruniaux Universite of Lille ENSAITGEMTEX Lab2 Allee Louise et Victor Champier59056RoubaixFrance Bahir Dar University Ethiopian Institute of Textile and Fashion TechnologyBahir DarEthiopia

Personal body armour is one of the most important pieces of equipment to protect human beings from various critical and fatal *** today’s modern world,various organizations including law enforcement and security service have made it mandatory for their personnel to wear personal protection system while on field ***,the systems should comprise an improved ballistic performance,light-weighted,flexible as well as comfortable panel not only to be accepted with a wider range but also for effective performances of the ***,the overall performances of the protective body armour could be affected by various parameters including armour design techniques,type of materials used and finishing of the *** current paper aims to critically review state-of-art for armour panel design techniques and the different perspective body armour *** paper starts by discussing the different body armour and its ***,the different states of technology for armour panel design(mostly for women),its problems and the possible solutions will be ***,the commonly used different polymeric fibrous and the future possible advanced materials including carbon nanotube(CNT),Graphene CNT and shear thickening fluids(STFs)treated materials for developing the reinforced body armour panel will be *** authors believe that this paper will enlighten useful guidelines and procedures about the different panel design techniques and current and promising future materials for researchers,designers,engineers and manufacturers working on the impact resistance body armour field.

关键词： Body armour panel design Ballistic impact behaviours Nanocomposites Shear thickening fluids(STFs) Military

飞秒激光调控非线性光学晶体和周期性纳米结构取向

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激光与光电子学进展 2022年第15期59卷 3-11页

作者：曹晶 Lancry Matthieu Brisset françois Poumellec Bertrand 清华大学材料学院北京100084 巴黎萨克雷大学奥赛高分子化学与材料研究所法国巴黎91405

通过高频(100~500 kHz)飞秒激光直写可在组成是Li_(2)O-Nb_(2)O_(5)-SiO_(2)的玻璃内部同时控制纳米非线性光学晶体和周期结构取向。该周期结构为发生纳米尺度相分离的晶态和非晶态交替结构,并可通过激光偏振方向来控制朝向。随着激光... 详细信息

通过高频(100~500 kHz)飞秒激光直写可在组成是Li_(2)O-Nb_(2)O_(5)-SiO_(2)的玻璃内部同时控制纳米非线性光学晶体和周期结构取向。该周期结构为发生纳米尺度相分离的晶态和非晶态交替结构,并可通过激光偏振方向来控制朝向。随着激光注入能量的增加出现了3个改性区间:低能量下改性非晶态,对氢氟酸(HF)的刻蚀速度高于玻璃基底;中能量下纳米晶体极轴趋向和激光偏振方向垂直,随着激光频率的提高,获得此区间的脉冲能量窗口急剧减小;高能量下微米晶粒,并且晶体的产生受写入模式影响(写入方向和激光偏振方向的夹角)。该研究发现有利于理解超快激光-物质相互作用和制备三维光器件。

关键词：激光技术纳米周期结构铌酸锂超快激光晶体

Describing failure in geomaterials using second-order work approach

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Water Science and Engineering 2015年第2期8卷 89-95页

作者： franois Nicot Félix Darve Institut de Recherche en Sciences et Technologies de l'Environnement et de l'Agriculture(IRSTEA) Erosion Torrentielle Neige et Avalanches (ETNA)Geomechanics GroupGrenoble 38402 France Université Joseph Fourier (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS) Laboratoire SolsSolides Structures et RisquesGrenoble 38041 France

Geomaterials are known to be non-associated materials. Granular soils therefore exhibit a variety of failure modes, with diffuse or localized kinematical patterns. In fact, the notion of failure itself can be confusing with regard to granular soils, because it is not associated with an obvious phenomenology. In this study, we built a proper framework, using the second-order work theory, to describe some failure modes in geomaterials based on energy conservation. The occurrence of failure is defined by an abrupt increase in kinetic energy. The increase in kinetic energy from an equilibrium state, under incremental loading, is shown to be equal to the difference between the external second-order work,involving the external loading parameters, and the internal second-order work, involving the constitutive properties of the material. When a stress limit state is reached, a certain stress component passes through a maximum value and then may decrease. Under such a condition, if a certain additional external loading is applied, the system fails, sharply increasing the strain rate. The internal stress is no longer able to balance the external stress, leading to a dynamic response of the specimen. As an illustration, the theoretical framework was applied to the well-known undrained triaxial test for loose soils. The influence of the loading control mode was clearly highlighted. It is shown that the plastic limit theory appears to be a particular case of this more general second-order work theory. When the plastic limit condition is met, the internal second-order work is nil. A class of incremental external loadings causes the kinetic energy to increase dramatically, leading to the sudden collapse of the specimen, as observed in laboratory.

关键词： Failure in geomaterials Undrained triaxial loading path Second-order work Kinetic energy Plastic limit condition Control parameter

Genesis of Daba arcuate structural belt related to adjacent basement upheavals:Constraints from Fission-track and (U-Th)/He thermochronology

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Science China Earth Sciences 2010年第11期53卷 1634-1646页

作者： GUILLOT franois Lab.FRE 3298 CNRS (Géosystèmes) Université Lille Nord de France

Fission-track, (U-Th)/He thermochronology, and cooling properties indicate that the southern Daba arcuate zone (SDBAZ) underwent a distinctive phase of rapid cooling in 153-100 Ma at a rate of 1.44-1.90°C/Ma. This rapid uplifting strongly contrasts with (1) the previous, rapid foreland subsidence during Early to Middle Jurassic in response to late-orogenic compression from the Qinling belt, (2) the succeeding long, slow cooling phase and relative thermal stability that occurred during the 100-45 Ma period. This rapid cooling event in the SDBAZ parallels those experienced by two adjacent upheavals of Huangling (HLUZ) and Hannan-Micang (HMUZ), with cooling rates of 2.22-3.17°C/Ma for the HLUZ in 160-126 Ma, 4.91°C/Ma for the southern HMUZ in 150-125 Ma, as well as 2.11°C/Ma for the northern HMUZ in 150-105 Ma. Comparing thermal histories among the SDBAZ, the HLUZ, the HMUZ, and the Wudang metamorphic zone (WDMZ), we infer that the Daba arcuate structural belt formed in 153-100 Ma. The combined dating data support a correlation with a low-angle arcuate south-thrusting of the Qinling orogen triggered by northward convergence of the Yangtze Craton, contemporaneously encountering rigid basement obstructions from the HLUZ and the HMUZ, respectively. Both the SDBAZ and neighboring domains additionally underwent a comparatively fast cooling and uplift since about 45 Ma.

关键词： Fission-track (U-Th)/He Daba arcuate belt basement upheavals correlation

A PERTURBATION METHOD FOR THE NUMERICAL SOLUTION OF THE BERNOULLI PROBLEM

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Journal of Computational Mathematics 2008年第1期26卷 23-36页

作者： franois Bouchon Stéphane Clain Rachid Touzani Laboratoire de Mathématiques Universite Blaise Pascal (Clermont-Ferrand) and CNRS (UMR 6620) Campus Universitaire des Cézeaux63177 Aubière cedexFrance Laboratoire MIP UFR MIGUniversité Paul Sabatier Toulouse 3118 route de Narbonne31062 Toulouse cedex 4France Laboratoire de Mathematiques Université Blaise Pascal (Clermont-Ferrand) and CNRS (UMR 6620) Campus Universitaire des Cézeaux63177 Aubière cedexFrance

We consider the numerical solution of the free boundary Bernoulli problem by employing level set formulations. Using a perturbation technique, we derive a second order method that leads to a fast iteration solver. The iteration procedure is adapted in order to work in the case of topology changes. Various numerical experiments confirm the efficiency of the derived numerical method.

关键词： Bernoulli problem Free boundary Level sets

Exploring the Impact of Crisis and Trauma on the Mental Health and Psychological Well-Being of University Students in Northern Haiti

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International Journal of Mental Health Promotion 2023年第2期25卷 173-191页

作者： Michael Galvin Guesly Michel Henri-Claude Saintelmond Carolyn Lesorogol Jean-françois Trani Lora Iannotti Harvard University Cambridge02138USA Boston University Boston02215USA Centre de SantéMental de Morne Pelé Cap-Haïtien2697Haiti UniversitéPublique du Nord au Cap-Haïtien Cap-Haïtien2697Haiti Washington University in St.Louis St.Louis63130USA

In recent decades,Haiti has been subject to man-made and natural disasters that have left its citizens vulnerable to a range of *** a weak state unable to protect its populace,Haitians are exposed to some of the highest levels of poverty and violence in the Western *** recent years,Haitians have experienced two crises that this study analyzes:the instability and political violence of“peyi lòk”as well as the global pandemic of *** community-based assessment explores the impact of these two crises on the mental health and psychological well-being of 38 Haitian university students in the understudied northern part of the *** indicate that both crises had similarities related to their psychological effects on young people,most notably in terms of traumatic experiences related to threats or violence,forced confinement,and large increases in population-wide ***,the extreme violence of“peyi lòk”and the widespread unpredictability of COVID-19 and its effects in the early days of the pandemic resulted in high levels of stress and *** crises also resulted in extreme economic hardship for students,with many reporting difficulties accessing basic needs such as food and *** study highlights how converging population-level crises in“complex emergencies”can heighten trauma and compromise mental health.

关键词： Haiti crisis mental health psychological well-being coronavirus COVID-19