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Boron-modified perhydropolysilazane towards facile synthesis of amorphous SiBN ceramic with excellent thermal stability

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Journal of Advanced Ceramics 2022年第7期11卷 1104-1116页

作者： Ying ZHAN Wei LI Tianshu JIANG Claudia FASEL Emmanuel III RICOHERMOSO Jan BERNAUER Zhaoju YU Zhenghao WU florian MÜLLER-PLATHE Leopoldo MOLINA-LUNA Ralf GROTTENMÜLLER Ralf RIEDEL Department of Materials and Earth Sciences Technical University of DarmstadtD-64287 DarmstadtGermany College of Materials Key Laboratory of High Performance Ceramic Fibers(Xiamen University)Ministry of EducationXiamen 361005China Eduard-Zintl-Institut für Anorganische und Physikalische Chemie Technical University of DarmstadtD-64287 DarmstadtGermany Merck KGaA Performance MaterialsD-64293DarmstadtGermany

SiBN ceramics are widely considered to be the most promising material for microwavetransparent applications in harsh environments owing to its excellent thermal stability and low dielectric *** work focuses on the synthesis and ceramization of single-source precursors for the preparation of SiBN ceramics as well as the investigation of the corresponding microstructural evolution at high temperatures including molecular dynamic ***-and chlorine-free perhydropolysilazanes were reacted with borane dimethyl sulfide complex at different molar ratios to synthesize single-source precursors,which were subsequently pyrolyzed and annealed under N2 atmosphere(without ammonolysis)to prepare SiBN ceramics at 1100,1200,and 1300℃with high ceramic yield in contrast to previously widely-used ammonolysis synthesis *** obtained amorphous SiBN ceramics were shown to have remarkably improved thermal stability and oxidation resistance compared to amorphous silicon ***,the experimental results have been combined with molecular dynamics simulation to further study the amorphous structure of SiBN and the atomic-scale diffusion behavior of Si,B,and N at 1300℃.Incorporation of boron into the Si–N network is found to suppress the crystallization of the formed amorphous silicon nitride and hence improves its thermal stability in N2 atmosphere.

关键词： polymer-derived ceramics(PDCs) SiBN crystallization molecular dynamics oxidation resistanc

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World Journal of Gastroenterology 2011年第45期17卷 4945-4951页

作者： Amedeo Carraro Dania El Mazloum florian Bihl Department of Surgery Veneto Oncological Institute IRCCS School of Medicine University of Padova Gastroenterology and Hepatology Unit San Giovanni Hospital Gastroenterology and Hepatology Service University Hospital of Geneva

Gallbladder diseases are very common in developed countries. Complicated gallstone disease represents the most frequent of biliary disorders for which surgery is regularly advocated. As regards, cholecystectomy represents a common abdominal surgical intervention; it can be performed as either an elective intervention or emergency surgery, in the case of gangrene, perforation, peritonitis or sepsis. Nowadays, the laparoscopic approach is preferred over open laparotomy. Globally, numerous cholecystectomies are performed daily; however, little evidence exists regarding assessment of post-surgical quality of life (QOL) following these interventions. To assess post-cholecystectomy QOL, in fact, documentation of high quality care has been subject to extended discussions, and the use of patientreported outcome satisfaction for quality improvement has been advocated for several years. However, there has been little research published regarding QOL out-comes following cholecystectomy; in addition, much of the current literature lacks systematic data on patientcentered outcomes. Then, although several tools have been used to measure QOL after cholecystectomy, diffi culty remains in selecting meaningful parameters in order to obtain reproducible data to reflect postoperative QOL. The aim of this study was to review the impact of surgery for gallbladder diseases on QOL. This review includes Medline searches of current literature on QOL following cholecystectomy. Most studies demonstrated that symptomatic patients profi ted more from surgery than patients receiving an elective intervention. Thus, the gain in QOL depends on the general conditions before surgery, and patients without symptoms profi t less or may even have a reduction in QOL.

关键词：生活质量切除术胆囊健康发达国家全球范围质量改善手术

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Tension-free Dirac strings and steered magnetic charges in 3D artificial spin ice

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npj Computational Materials 2021年第1期7卷 1127-1134页

作者： Sabri Koraltan florian Slanovc florian Bruckner Cristiano Nisoli Andrii V.Chumak Oleksandr V.Dobrovolskiy Claas Abert Dieter Suess Physics of Functional Materials Faculty of PhysicsUniversity of ViennaViennaAustria Theoretical Division Los Alamos National LaboratoryLos AlamosNMUSA Nanomagnetics and Magnonics Faculty of PhysicsUniversity of ViennaViennaAustria Research Platform MMM Mathematics-Magnetism-Materials University of ViennaViennaAustria

3D nano-architectures presents a new paradigm in modern condensed matter physics with numerous applications in photonics,biomedicine,and *** are promising for the realization of 3D magnetic nano-networks for ultra-fast and low-energy data *** in these systems can lead to magnetic charges or magnetic monopoles,which can function as mobile,binary information ***,Dirac strings in 2D artificial spin ices bind magnetic charges,while 3D dipolar counterparts require cryogenic temperatures for their ***,we present a micromagnetic study of a highly frustrated 3D artificial spin ice harboring tension-free Dirac strings with unbound magnetic charges at room *** use micromagnetic simulations to demonstrate that the mobility threshold for magnetic charges is by 2 eV lower than their unbinding *** applying global magnetic fields,we steer magnetic charges in a given direction omitting unintended *** introduced system paves the way toward 3D magnetic networks for data transport and storage.

关键词： stability magnetic artificial

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Management of renal replacement therapy among adults in French intensive care units: A bedside practice evaluation

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Journal of Intensive Medicine 2023年第2期3卷 147-154页

作者： florian Jolly Marine Jacquier Delphine Pecqueur Marie Labruyère Christophe Vinsonneau Isabelle Fournel Jean-Pierre Quenot The READIAL Study group Service de Médecine Intensive-Réanimation CHU Dijon-BourgogneDijon 21000France Equipe Lipness Centre de recherche INSERM UMR1231 et LabEx LipSTICUniversitéde Bourgogne-Franche ComtéDijon 21000France INSERM CIC 1432Module Epidémiologie CliniqueDijon 21000France CHU Dijon-Bourgogne Centre d’Investigation CliniqueModule Epidémiologie Clinique/Essais CliniquesDijon 21000France Service de Médecine Intensive Réanimation-Unitéde Sevrage Ventilatoire et Réhabilitation CH de BethuneBethune 62408France 不详

Background:This study aimed to investigate renal replacement therapy (RRT) practices in a representative nationwide sample of French intensive care units (ICUs).Methods:From July 1 to October 5 2021, 67 French ICUs provided data regarding their ICU and RRT implementation. We used an online questionnaire to record general data about each participating ICU, including the type of hospital, number of beds, staff ratios, and RRT implementation. Each center then prospectively recorded RRT parameters from 5 consecutive acute kidney injury (AKI) patients, namely the indication, type of dialysis catheter used, type of catheter lock used, type of RRT (continuous or intermittent), the RRT parameters initially prescribed (dose, blood flow, and duration), and the anticoagulant agent used for the ***:A total of 303 patients from 67 ICUs were analyzed. Main indications for RRT were oligo-anuria (57.4%), metabolic acidosis (52.1%), and increased plasma urea levels (47.9%). The commonest insertion site was the right internal jugular (45.2%). In 71.0% of cases, the dialysis catheter was inserted by a resident. Ultrasound guidance was used in 97.0% and isovolumic connection in 90.1%. Citrate, unfractionated heparin, and saline were used as catheter locks in 46.9%, 24.1%, and 21.1% of cases, ***:Practices in French ICUs are largely compliant with current national guidelines and international literature. The findings should be interpreted in light of the limitations inherent to this type of study.

关键词： Renal replacement therapy Acute kidney injury Intensive care unit Practice evaluation Bedside

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Machine learning sparse tight-binding parameters for defects

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npj Computational Materials 2022年第1期8卷 1081-1091页

作者： Christoph Schattauer Milica Todorović Kunal Ghosh Patrick Rinke florian Libisch Institute for Theoretical Physics TU Wien1040ViennaAustria Department of Applied Physics Aalto UniversityP.O.Box 11100AaltoFI-00076Finland Department of Mechanical and Materials Engineering University of TurkuFI-20014TurkuFinland Department of Information and Computer Science Aalto UniversityP.O.Box 15400AaltoFI-00076Finland

We employ machine learning to derive tight-binding parametrizations for the electronic structure of *** test several machine learning methods that map the atomic and electronic structure of a defect onto a sparse tight-binding *** Multi-layer perceptrons(i.e.,feed-forward neural networks)perform best we adopt them for our further *** demonstrate the accuracy of our parameterizations for a range of important electronic structure properties such as band structure,local density of states,transport and level spacing simulations for two common defects in single layer *** machine learning approach achieves results comparable to maximally localized Wannier functions(i.e.,DFT accuracy)without prior knowledge about the electronic structure of the defects while also allowing for a reduced interaction range which substantially reduces calculation *** is general and can be applied to a wide range of other materials,enabling accurate large-scale simulations of material properties in the presence of different defects.

关键词： structure electronic spacing

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Disclosing and Evaluating Artistic Research

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Journal of Data and Information Science 2019年第3期4卷 35-54页

作者： florian Vanlee Walter Ysebaert Researcher Arts & Design Research Outcomes Vrije Universiteit Brussel

Purpose: This study expands on the results of a stakeholder-driven research project on quality indicators and output assessment of art and design research in Flanders-the Northern, Dutchspeaking region of Belgium. Herein, it emphasizes the value of arts & design output registration as a modality to articulate the disciplinary demarcations of art and design ***/methodology/approach: The particularity of art and design research in Flanders is first analyzed and compared to international examples. Hereafter, the results of the stakeholderdriven project on the creation of indicators for arts & design research output assessment are discussed. Findings: The findings accentuate the importance of allowing an assessment culture to emerge from practitioners themselves, instead of imposing ill-suited methods borrowed from established scientific evaluation models(Biggs & Karlsson, 2011)-notwithstanding the practical difficulties it generates. They point to the potential of stakeholder-driven approaches for artistic research, which benefits from constructing a shared metadiscourse among its practitioners regarding the continuities and discontinuities between "artistic" and "traditional" research, and the communal goals and values that guide its knowledge production(Biggs & Karlsson, 2011;Hellstr?m, 2010;Ysebaert & Martens, 2018). Research limitation: The central limitation of the study is that it focuses exclusively on the "Architecture & Design" panel of the project, and does not account for intra-disciplinary complexities in output assessment. Practical implications: The goal of the research project is to create a robust assessment system for arts & design research in Flanders, which may later guide similar international projects. Originality/value: This study is currently the only one to consider the productive potential of(collaborative) PRFSs for artistic research.

关键词： Artistic research Output registration Performance-based Research Funding Systems (PRFSs) Stakeholder-driven Evaluation Model

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A novel multi-shot target platform for laser-driven laboratory astrophysics experiments

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High Power Laser Science and Engineering 2023年第2期11卷 11-19页

作者： Pablo Perez-Martin Irene Prencipe Manfred Sobiella Fabian Donat Ning Kang Zhiyu He Huiya Liu Lei Ren Zhiyong Xie Jun Xiong Yan Zhang florian-Emanuel Brack MichalČervenák Pavel Gajdoš Lenka Hronová Kakolee Kaniz Michaela Kozlová florian Kroll Xiayun Pan Gabriel Schaumann Sushil Singh MichalŠmíd Francisco Suzuki-Vidal Panzheng Zhang Jinren Sun Jianqiang Zhu Miroslav Krůs Katerina Falk Helmholtz-Zentrum Dresden-Rossendorf Institute of Radiation PhysicsDresdenGermany Technische Universität Dresden DresdenGermany Key Laboratory of High Power Laser and Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina Shanghai Institute of Laser Plasma China Academy of Engineering PhysicsShanghaiChina Institute of Plasma Physics Czech Academy of SciencesPragueCzech Republic Czech Technical University Faculty of Nuclear Sciences and Physical EngineeringPragueCzech Republic Department of Physics Jagannath UniversityDhakaBangladesh ELI-Beamlines Institute of PhysicsCzech Academy of SciencesPragueCzech Republic Institute for Nuclear Physics Technical University of DarmstadtDarmstadtGermany Institute of Physics Czech Academy of SciencesPragueCzech Republic Blackett Laboratory Imperial CollegeLondonUnited Kingdom First Light Fusion Oxford Industrial ParkYarntonOxfordUnited Kingdom

A new approach to target development for laboratory astrophysics experiments at high-power laser facilities is *** the dawn of high-power lasers,laboratory astrophysics has emerged as a field,bringing insight into physical processes in astrophysical objects,such as the formation of *** important factor for success in these experiments is *** date,targets have mainly relied on expensive and challenging microfabrication *** design presented incorporates replaceable machined parts that assemble into a structure that defines the experimental *** can make targets cheaper and faster to manufacture,while maintaining robustness and *** platform is intended for experiments on plasma flows,but it is flexible and may be adapted to the constraints of other experimental *** of targets used in experimental campaigns are shown,including a design for insertion in a high magnetic field *** results are included,demonstrating the performance of the targets.

关键词： high magnetic fields laboratory astrophysics laser-plasma interaction magnetized plasmas target design

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Assembly dynamics of East Asian subtropical evergreen broadleaved forests: New insights from the dominant Fagaceae trees

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Journal of Integrative Plant Biology 2022年第11期64卷 2126-2134页

作者： Lisi Hai Xiao-Qian Li Jing-Bo Zhang Xiao-Guo Xiang Rui-Qi Li florian Jabbour Rosa del COrtiz An-Ming Lu Zhi-Duan Chen Wei Wang State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of SciencesBeijing 100093China University of Chinese Academy of Sciences Beijing 100049China Jiangxi Province Key Laboratory of Watershed Ecosystem Change and Biodiversity Institute of Life Science and School of Life SciencesNanchang UniversityNanchang 330031China Institut de Systématique EvolutionBiodiversité(ISYEB)Muséum national d'Histoire naturelleCNRSSorbonne UniversitéEPHEUniversitédes AntillesParis 75005France Missouri Botanical Garden St.LouisMissouri 63166‐0299USA

The dominant species of a biome can be regarded as its genuine *** broadleaved forests(EBLFs) in subtropical East Asia harbor high levels of species biodiversity and endemism and are vital to regional carbon storage and ***,the historical assembly of this unique biome is still *** is the most essential family in East Asian subtropical EBLFs and its dominant species are vital for the existence of this ***,we used the dominant Fagaceae species to shed light on the dynamic process of East Asian subtropical EBLFs *** results indicate high precipitation in summer and low temperature in winter are the most influential climatic factors for the distribution of East Asian subtropical *** East Asian subtropical EBLFs did not begin to appear until 23 Ma,subsequently experienced a longlasting development in the Miocene and markedly deteriorated at about 4 Ma,driven jointly by orogenesis and *** also document that there is a lag time between when one clade invaded the region and when its members become dominant species within the *** study may improve our ability to predict and mitigate the threats to biodiversity of East Asian subtropical EBLFs and points to a new path for future studies involving multidisciplinary methods to explore the assembly of regional biomes.

关键词： biome climate change dominant species East Asia ecological niche modeling phylogeny

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Characteristics of developing scour-holes at a sand-embedded cylinder

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International Journal of Sediment Research 2008年第3期23卷 258-266页

作者： Oscar LINK florian PFLEGER Ulrich ZANKE Dept. of Civil Engineering University of Concepción Edmundo Larenas 270 Concepción Chile.Dr.-Ing. Assistant Prof. Doctoral Research Fellow Institute for Hydromechanics Technische Universitt München Arcisstrasse 21 80333 München Germany. Institute for Hydraulic and Water Resources Engineering Darmstadt University of Technology Rundeturmstraβe 1 64283 Germany.Full Prof.

Characteristics of developing scour-holes at a sand-embedded 0.2 m diameter circular cylinder are presented. Non-intrusive, high-resolution topographic measurements of developing scour-holes were made with an experimental installation using a laser distance sensor (LDS) and precision step-motors. A clear-water experiment was conducted with bed shear stress equal to 95% of the critical bed shear stress for the initiation of sediment motion at the undisturbed plane sand bed with a d50 of 0.26 mm. During the running experiment of 21 hours duration, measurements were taken by the LDS in different azimuthal half-planes with θ = 0, 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165 and 180o in order to study the spatio-temporal variation of geometric properties in developing scour-holes. After 21 hours, the equilibrium condition was approached, with a scour rate less than d50 per hour. Measurement of maximum scour depth in different azimuthal half-planes at different points in time during the experiment show that scour started at the cylinder side and surrounded the cylinder after about 20% of experiment time. Slopes of developing scour-holes presented three regions with different inclinations, which were attributed to vortex action. Both maximum scour depth and maximum scour radius at different azimuthal half-planes are well correlated with the maximum scour depth at plane with θ = 0o. When providing maximum scour depth at the cylinder front, the presented correlations are useful for simple calculation of scour-hole topography. This work provides an experimental database for advanced numerical simulation for loose sediment hydraulics.

关键词： Scour Bridges Piers Sediment transport Loose sediment hydraulics

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Root and leaf functional trait relations in Poaceae species: implications of differing resource- acquisition strategies

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Journal of Plant Ecology 2013年第3期6卷 211-219页

作者： florian Fort Claire Jouany Pablo Cruz INRA UMR 1248 AGIRCentre de recherche de ToulouseCS 5262731326 Castanet-TolosanCedexFrance

Aims root systems play an essential role in grassland functioning in both acquisition and storage of ***,root functional traits have not received as much attention as those measured on above-ground organs,and little is known about their *** objec-tives were to test whether morphological and root system traits allowed identification of grass species’functional strategies and to determine whether a relation exists between above-and below-ground *** Functional traits of root tissues(specific root length,diameter,tissue density and nitrogen concentration),whole root systems(root mass,root length density,root mass percentage below a depth of 20 cm and fine root%)and two major leaf traits(specific leaf area and leaf dry matter content)were determined under field conditions and their rela-tions were analysed in eleven perennial temperate Poaceae *** Findings Canonical correspondence analysis along axis 1 revealed a gra-dient of species,from those with deep,dense and coarse root systems with a large root mass to those with shallow root sys-tems,thin roots and high specific root length;this suggests strong correlations among root *** between specific root length and specific leaf area reveal two groups of species,which probably indicates different drought-tolerance *** trait syndromes enable ranking grasses along a gradient from conservative-strategy species(from stressful habitats),which display a deep and coarse root system,to acquisitive species(from rich and moist meadows),which display a shallow and thin root *** both types display similar above-ground strategies,drought-tolerant species have lower specific root lengths than drought-sensitive species,revealing more conservative root strategies.

关键词： root functional trait functional group grasses root ecology below-ground strategy

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