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Burst mode enabled ultrafast laser inscription inside gallium arsenide

International Journal of Extreme Manufacturing 2022年第4期4卷 179-187页

作者： Andong Wang pol sopeña David Grojo Aix-Marseille University CNRSLP3UMR734113009 MarseilleFrance

Ultrafast laser inscription(ULI)inside semiconductors offers new perspectives for 3D monolithic structures to be fabricated and new functionalities to be added in electronic and photonic ***,important challenges remain because of nonlinear effects such as strong plasma generation that distort the energy delivery at the focal point when exposing these materials to intense infrared *** to now,the successful technological demonstrations have primarily concentrated on silicon(Si).In this paper,we target at another important semiconductor:gallium arsenide(GaAs).With nonlinearities higher than those of Si,3D-machining of GaAs with femtosecond pulses becomes even ***,we show that the difficulty can be circumvented by burst-mode *** generate and apply trains of pulses at terahertz repetition rates for efficient pulse-to-pulse accumulation of laser-induced free carriers in the focal region,while avoiding an overdose of prefocal *** superior performance of burst-mode irradiation is confirmed by a comparative study conducted with infrared luminescence *** results indicate a successful reduction of the plasma density in the prefocal region so that higher pulse energy reaches the focal *** same method is applied to identify optimum irradiation conditions considering particular cases such as asymmetric pulse trains and aberrated *** 64-pulse trains,we successfully manage to cross the writing threshold providing a solution for ULI inside *** application potential is finally illustrated with a stealth dicing demonstration by taking benefit of the burst *** irradiation method opens wide possibilities for 3D structuring inside GaAs by ULI.

关键词： laser processing ultrafast laser inscription THz-repetition-rate burst semiconductors gallium arsenide

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Liquid superlubricity of lubricants containing hydroxyl groups and their aqueous solution under rolling/sliding conditions

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Friction 2024年第1期12卷 164-173页

作者： Tomáš polÁČEK Petr ŠPERKA Ivan KŘUPKA Faculty of Mechanical Engineering Brno University of TechnologyBrno 61669Czech Republic

Macroscale rolling/sliding conditions are in the superlubricity,a little-studied topic so *** purpose of this paper is to examine the formation of elastohydrodynamic lubrication(EHL)films by water-based lubricants(glycerol and polyethylene glycol(PEG)),providing superlubricous *** were carried out on an optical ball-on-disc tribometer under rolling/sliding *** film thickness was measured by the thin film colorimetric interferometry,and the viscosity of liquids was measured by rotational and high-pressure falling body *** results show that tribochemical reactions are not the mandatory reason for friction to reach the superlubricity level when using the water-based *** studied liquids themselves are almost *** the addition of water,the signs of shear thinning behavior disappear even *** conditions for this type of lubricant can be predicted using the known Hamrock–Dowson *** anomaly in the thickness of the lubricants was observed as an abrupt change at certain *** more PEG there is in the lubricant,the higher the thickness at the beginning of the jump.

关键词： macroscale superlubricity super low traction water-based lubricants elastohydrodynamic lubrication(EHL) film thickness

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你不知道的杰夫·亚斯

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商业周刊（中文版） 2024年第13期 66-73页

作者： Annie Massa pol-Edouard(插图) 不详

从海湖庄园(Mar-a-Lago)到听涛山庄(the Breakers)的路程大约10分钟。今年3月初,唐纳德·特朗普(Donald Trump)前往这座与他的棕榈滩俱乐部齐名的历史悠久的庄园,进行了一项尴尬的和解任务,对象是反税政治倡导组织“增长俱乐部”(Club f... 详细信息

从海湖庄园(Mar-a-Lago)到听涛山庄(the Breakers)的路程大约10分钟。今年3月初,唐纳德·特朗普(Donald Trump)前往这座与他的棕榈滩俱乐部齐名的历史悠久的庄园,进行了一项尴尬的和解任务,对象是反税政治倡导组织“增长俱乐部”(Club for Growth)。

关键词：杰夫俱乐部棕榈滩庄园

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全自动磨坊粮仓改造

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现代装饰 2024年第4期 54-61页

作者：无 Petr polák(摄影) 范嘉苑(编译) 捷克ProkšPrikryl Architekti 不详

这座全自动化的磨坊是捷克的国家级别文化纪念碑,亦是建筑师Josef Gocár早期设计的首批建筑之一。坐落于帕尔杜比采市中心的Chrudimka河畔,这座丰碑式的磨坊建筑于1909年由Winternitz兄弟创建。在1924年,建筑群进行了扩建,增加了一座谷... 详细信息

这座全自动化的磨坊是捷克的国家级别文化纪念碑,亦是建筑师Josef Gocár早期设计的首批建筑之一。坐落于帕尔杜比采市中心的Chrudimka河畔,这座丰碑式的磨坊建筑于1909年由Winternitz兄弟创建。在1924年,建筑群进行了扩建,增加了一座谷仓,而其改造设计则由Proks Prikryl建筑事务所担纲。这座全自动化磨坊一直持续运营至2013年,将近100年的时间。从2016年起,在全自动磨坊基金会的推动下,磨坊这一片函待重新开发的城市用地开始转型为文化和都市城区。

关键词：建筑事务所城市用地全自动化纪念碑谷仓建筑群改造设计持续运营

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Epidemiology and Clonal Spread Evidence of Carbapenem-Resistant Organisms in the Center of Care and Protection of Orphaned Children, Vietnam

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Open Journal of Medical Microbiology 2024年第3期14卷 165-189页

作者： Van Kim Nguyen Pirom Noisumdaeng pol. Maj. Katiya Ivanovitch Stephen Baker Eugene Athan Stephanie Jones Le Thi Lan Larry Croft Yin Peng Lee Tara Cassidy Van Hung Tran Thi Hang Phan Huu Tinh Ho Faculty of Public Health Thammasat University Bangkok Thailand Department of Prevention and Infection Control Hung Vuong Hospital HCM City Vietnam Microbiology of Faculty of Public Health Thammasat University Bangkok Thailand Thammasat University Research Unit in Modern Microbiology and Public Health Genomics Thammasat University Bangkok Thailand National Heart & Lung Institute (NHLI) University of Cambridge Cambridge UK Barwon South West Public Health Unit Geelong Australia Center for Innovation in Infectious Disease and Immunology Research (CIIDIR) Geelong Australia School of Medicine Deakin University Burwood Australia Monash Health Berwick Australia Center of Care and Protection of Orphaned Children HCM City Vietnam Charles River Laboratories Microbial Solutions Melbourne Australia Personnel Department of Nhan Dan Gia Dinh Hospital HCM City Vietnam Hung Vuong Hospital HCM City Vietnam Department of Epidemiology Institute of Public Health HCM City Vietnam

Objective: To determine the prevalence of colonization and transmission of carbapenem-resistant Gram-negative organisms in order to develop of an effective infection prevention program. Design: Cross-sectional study with carbapenem-resistant organisms (CRO) colonization detection from the fecal specimens of 20 Health Care Workers (HCWs) and 67 residents and 175 random environment specimens from September 2022 to September 2023. Setting: A Care and Protection Centre of Orphaned Children in South of HCM City. Participants: It included 20 HCWs, 67 residents, and 175 randomly collected environmental specimens. Method: Rectal and environmental swabs were collected from 20 HCWs, 67 residents (most of them were children), and 175 environmental specimens. MELAB Chromogenic CARBA agar plates, Card NID, and NMIC-500 CPO of the BD Phoenix TM Automated Microbiology System and whole genome sequencing (WGS) were the tests to screen, confirm CROs, respectively and determine CRO colonization and transmission between HCWs, residents, and the environment. Result: We detected 36 CRO isolates, including 6, 11 and 19 CROs found in 6 HCWs, 10 residents and 19 environments. The prevalence of detectable CRO was 30% (6/20) in HCWs, 14.92% (10/67) in residents, and 10.86% (19/175) in environmental swabs in our study. WGS demonstrated CRO colonization and transmission with the clonal spread of E. coli and A. nosocomialis, among HCWs and residents (children). Conclusion: Significant CRO colonization and transmission was evident in HCWs, residents, and the center environment. Cleaning and disinfection of the environment and performing regular hand hygiene are priorities to reduce the risk of CRO colonization and transmission.

关键词： Carbapenem-Resistant Organisms Contamination Hand Hygiene Whole Genome Sequencing Infection Prevention

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More bricks in the wall against SARS-CoV-2 infection:involvement of γ9δ2 T cells

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Cellular & Molecular Immunology 2020年第7期17卷 771-772页

作者： Ger Rijkers Trees Vervenne Pieter van der pol St.Elisabeth Hospital TilburgThe Netherlands Admiral De Ruyter Hospital GoesThe Netherlands Science Department University College RooseveltMiddelburgThe Netherlands

The SARS-CoV-2 virus which emerged in late December 2019 had reached pandemic proportions by March 2020.1 Host defence mechanisms against this new member of the corona virus family will include innate immunity,humoral,and cellular immune responses,of yet unknown relative *** CD8^(+) αβTCR cytotoxic T cells and natural killer cells are mainly responsible for detection and elimination of virus infected cells,with a special role for the CD94/NK group 2 member A(NKG2A)receptor as reported by Zheng et *** this journal.2,3 We want to report yet another brick in the wall against SARS-CoV-2 infection,made of a subset of γδTCR T cells.

关键词： NKG2A involvement infection

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Fabrication of AA7005/TiB2-B4C surface composite by friction stir processing: Evaluation of ballistic behaviour

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Defence Technology（防务技术） 2019年第3期15卷 363-368页

作者： Nitinkumar pol Gaurav Verma R.P.Pandey T.Shanmugasundaram Research and Development Establishment (Engineers) Pune India Department of Metallurgical & Materials Engg. Defence Institute of Advanced Technology Pune India Armament Research and Development Establishment Pune India

The present work aims to enhance the ballistic resistance of AA7005 alloy by incorporating the TiB2 and B4C ceramic reinforcement particles. Surface composites with different weight fractions of TiB2 and B4C particles were processed by friction stir processing. Micro-hardness and depth of penetration tests were carried out to evaluate the ballistic properties of the surface composites. The surface hardness of the composite was found to be nearly 70 HV higher than base alloy. The depth of penetration of the steel projectile was 20e26mm in the composites as compared to 37mm in the base alloy. Ballistic mass efficiency factor of the surface composite was found to be 1.6 times higher than base alloy. This is mainly attributed to the dispersion strengthening from the reinforcement particles.

关键词： Aluminum alloys Metal matrix composite Ballistic testing Friction stir processing

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Damage evolution and dynamic response of cement asphalt mortar layer of slab track under vehicle dynamic load

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Science China(Technological Sciences) 2014年第10期57卷 1883-1894页

作者： ZHU ShengYang FU Qiang CAI ChengBiao SPANOS pol D State Key Laboratory of Traction Power Southwest Jiaotong University School of Civil Engineering Central South University Ryon Chair in Engineering Rice University

The damage evolution and dynamic performance of a cement asphalt(CA)mortar layer of slab track subjected to vehicle dynamic load is investigated in this ***,a statistical damage constitutive model for the CA mortar layer is developed using continuous damage mechanics and probability *** this model,the strength of the CA mortar elements is treated as a random variable,which follows the Weibull *** inclusion of strain rate dependence affords considering its influence on the damage development and the transition between viscosity and *** with experimental data support the reliability of the model.A three-dimensional finite element(FE)model of a slab track is then created with the commercial software ABAQUS,where the devised model for the CA mortar is implemented as a user-defined material ***,a vertical vehicle model is coupled with the FE model of the slab track,through the wheel-rail contact forces,based on the nonlinear Hertzian contact *** evolution of the damage and of the dynamic performance of the CA mortar layer with various initial damage is investigated under the train and track *** analysis indicates that the proposed model is capable of predicting the damage evolution of the CA mortar layer exposed to vehicle dynamic *** dynamic compressive strain,the strain rate,and the induced damage increase significantly with an increase in the initial damage,whereas the dynamic compressive stress exhibits a sharp decrease with the increasing initial ***,it is found that the strain rate dependence significantly influences the damage evolution and the dynamic behavior of the CA mortar layer.

关键词： cement asphalt mortar slab track statistical damage constitutive model vehicle-track coupled dynamics damage evolution

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Induced pluripotent stem cells for modeling and cell therapy of Parkinson＇s disease

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Neural Regeneration Research 2016年第5期11卷 727-728页

作者： Mária Csobonyeiová Lubos Danisovic Stefan polák Institute of Histology and Embryology Faculty of Medicine Comenius University in Bratislava Bratislava Slovakia Institute of Medical Biology Genetics and Clinical Genetics Faculty of Medicine Comenius University in Bratislava Bratislava Slovakia

Neurodegenerative disorders include a variety of hereditary or sporadic diseases involving the chronic,progressive loss on neural ***＇s disease（PD）is the second most common neurodegenerative disease,affecting more than 6 million people worldwide（Wan et al.,2015）.Degeneration of nigrostriatal dopamine（DA）neurons is the main pathology in PD.

关键词： INDUCTION IPSCS

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Energetics and thermodynamic stability of potential Fe (II) -hexa-aza-active sites for O_(2) reduction in PEM fuel cells

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SusMat 2022年第6期2卷 731-748页

作者： Vassili P.Glibin Jean-pol Dodelet Gaixia Zhang Department of Chemical and Biochemical Engineering University of Western OntarioLondon OntarioCanada Institut National de la Recherche Scientifique(INRS) Energie Materiaux Telecommunications Research CentreVarennesQuebecCanada Department of Electrical Engineering Ecole de Technologie Superieure(ETS)1100rue Notre-Dame OuestMontrealQuebec H3C 1K3Canada

We present here a thermodynamic assessment of the stability behavior in acid environment at 298 and 353 K(80◦C)of two iron(II)hexa-aza-macrocyclic complexes and of an hexa-aza-iron-based site(Fe^(II)N_((4+2))/C)that should potentially be active for the oxygen reduction reaction in proton exchange membrane(PEM)fuel *** calculations of the equilibrium constant(K c)for the demetallation reaction indicate that the iron(II)-hexa-aza-macrocyclic complexes and Fe^(II)N_((4+2))/C are chemically stable in an acid medium at 298 and 353 *** with two other potential model sites(Fe^(II)N_((4+2))/C and Fe II N(2+2)/C)that were thought to be present in the same Fe-based catalysts,K c of Fe^(II)N_((4+2))/C is two to three orders of magnitude smaller at 353 K,and three to four orders of magnitude smaller at 298 K,than K c for Fe^(II)N_((4+2))/C or Fe II N(2+2)/C,revealing the great chemical stability of Fe^(II)N_((4+2))/*** this work,we discuss about a novel proposition that the two catalytic sites active in these Fe-based catalysts are Fe II N_(4)/C and Fe^(II)N_((4+2))/*** proposition is in agreement with the durability behavior of these catalysts in PEM fuel cells and also with their known physico-chemical *** origin of the fast and slow decay behaviors of the different sites,which are active at the Fe–N–C-based cathode of PEM fuel cells,is also discussed.

关键词： active site fuel cell oxygen reduction reaction thermodynamic stability

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