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Comparative Study of Three High Order Schemes for LES of Temporally Evolving Mixing Layers

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Communications in Computational Physics 2012年第10期12卷 1603-1622页

作者： Helen C.Yee bjorn Sjögreen Abdellah Hadjadj NASA-Ames Research Center Moffett FieldCA94035USA Lawrence Livermore National Laboratory LivermoreCA94551USA CORIA UMR 6614&INSA de Rouen 76800 St-Etienne du RouvrayFrance

Three high order shock-capturing schemes are compared for large eddy simulations(LES)of temporally evolving mixing layers for different convective Mach numbers ranging from the quasi-incompressible regime to highly compressible supersonic *** considered high order schemes are fifth-order WENO(WENO5),seventh-order WENO(WENO7)and the associated eighth-order central spatial base scheme with the dissipative portion of WENO7 as a nonlinear post-processing filter step(WENO7fi).This high order nonlinear filter method of Yee&Sjogreen is designed for accurate and efficient simulations of shock-free compressible turbulence,turbulence with shocklets and turbulence with strong shocks with minimum tuning of scheme *** LES results by WENO7fi using the same scheme parameter agree well with experimental results compiled by Barone et al.,and published direct numerical simulations(DNS)work of Rogers&Moser and Pantano&Sarkar,whereas results by WENO5 andWENO7 compare poorly with experimental data and DNS computations.

关键词： High order numerical methods numerical methods for turbulencewith shocks DNS LES mixing layer

Alloying effect of silver in magnesium on the development of microstructure and mechanical properties by indirect extrusion

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Journal of Magnesium and Alloys 2021年第1期9卷 112-122页

作者： bjorn Wiese Regine Willumeit-Römer Dietmar Letzig Jan Bohlen Division Metallic Biomaterials Institute of Materials ResearchHelmholtz-Zentrum GeesthachtMax-Planck-Str.1Geesthacht 21502Germany Magnesium Innovation Center(MagIC) Institute of Materials ResearchHelmholtz-Zentrum GeesthachtMax-Planck-Str.1Geesthacht 21502Germany

The effect of Ag in solid solution on the microstructure,texture and the deformation behaviour of indirectly extruded Mg was *** as a solid solution strengthener affects the behaviour during extrusion,resulting in enhanced deformation related heating and corresponding coarser grained *** substantial effect on the texture development is *** mechanical properties simultaneously increase in stress and strain levels with increasing Ag content,especially in tension as a result of the changing impact of the slip modes which can be associated with a decrease of the lattice parameters as well as the c/a ratio of the hcp lattice *** compression tests with twin dominated flow,the impact is much smaller on the compressive yield stress but higher with respect to the twinning related strain hardening *** solution strength functions for Fleischer and Labusch were determined,also confirming the anisotropic behaviour of the extruded Mg alloys.

关键词： Mg-Ag-alloys Lattice parameters Indirect extrusion Microstructure Mechanical properties

Metasurface-based multi-harmonic freeelectron light source

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Light(Science & Applications) 2018年第1期7卷 428-439页

作者： Gilles Rosolen Liang Jie Wong Nicholas Rivera bjorn Maes Marin Soljačić Ido Kaminer Department of Physics Massachusetts Institute of Technology77 Massachusetts AvenueCambridgeMA 02139USA Micro-and Nanophotonic Materials Group University of MonsPlace du Parc 207000 MonsBelgium Singapore Institute of Manufacturing Technology 2 Fusionopolis WayInnovisSingapore 138634Singapore Department of Electrical Engineering Technion–Israel Institute of TechnologyHaifa 32000Israel

Metasurfaces are subwavelength spatial variations in geometry and material where the structures are of negligible thickness compared to the wavelength of light and are optimized for far-field applications,such as controlling the wavefronts of electromagnetic ***,we investigate the potential of the metasurface near-field profile,generated by an incident few-cycle pulse laser,to facilitate the generation of high-frequency light from free *** particular,the metasurface near-field contains higher-order spatial harmonics that can be leveraged to generate multiple higher-harmonic X-ray frequency *** show that the X-ray spectral profile can be arbitrarily shaped by controlling the metasurface geometry,the electron energy,and the incidence angle of the laser *** ab initio simulations,we predict bright and monoenergetic X-rays,achieving energies of 30 keV(with harmonics spaced by 3 keV)from 5-MeV electrons using 3.4-eV plasmon polaritons on a metasurface with a period of 85 *** an example,we present the design of a four-color X-ray source,a potential candidate for tabletop multicolor hard X-ray *** developments could help pave the way for compact multi-harmonic sources of high-energy photons,which have potential applications in industry,medicine,and the fundamental sciences.

关键词： spectroscopy harmonic harmonics

Intraperitoneal chemotherapy and its evolving role in management of gastric cancer with peritoneal metastases

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Chinese Journal of Cancer Research 2014年第1期26卷 1-3页

作者： Emel Canbay Yutaka Yonemura bjorn Brucher Seung Hyuk Baik Paul H.Sugarbaker NPO HIPEC ISTANBUL Akkavak Sokak No:4/2NisantasiIstanbul 34365Turkey Ethica Incirli Hospital NPO to support Peritoneal Dissemination Treatment 1-26 HarukimotomachiKishiwada CityOsaka 596-8522Japan NPO HIPEC ISTANBUL Akkavak Sokak No:4/2NisantasiIstanbul 34365Turkey NPO to support Peritoneal Dissemination Treatment 1-26HarukimotomachiKishiwada CityOsaka 596-8522Japan Department of General Surgery Kusatsu General Hospital Department of General Surgery Kishiwada Tokushukai Hospital Department of Peritoneal Surface Malignancy Bon Secours Cancer Institute Deparment of General Surgery Yonsei University College of Medicine Center for Gastrointestinal Malignancies Program in Peritoneal Surface OncologyMedStar Washington Hospital CenterNWPOB North Tower 3900 WashingtonDC 20010USA

Advanced gastric cancer （GC） has been recognized as lethal disease when peritoneal metastases （PM） *** is no standard treatment for advanced GC with *** 1980s,the therapeutic arena for these patients had remained stagnant,with no therapeutic approach having shown a survival gain in GC with ***,cytoreductive surgery （CRS） with peritonectomy procedures and intraperitoneal chemotherapy （IPC） promising new combined therapeutic approach to achieve disease control for GC with *** recent publications changed the GC with PM treatment landscape by providing an evidence that CRS and IPC led to prolongation in overall survival （OS）.This review will provide an overview of the evolving role of CRS and IPC in the management of advanced GC with PM in the current era.

关键词： Gastric cancer (GC) peritoneal carcinomatosis intraperitoneal and systemic induction chemotherapy cytoreductive surgery (CRS) hyperthermic intraperitoneal chemotherapy (IPC)

Transcriptional Wiring of Cell Wall-Related Genes in Arabidopsis

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Molecular Plant 2009年第5期2卷 1015-1024页

作者： Marek Mutwil Colin Ruprecht Federico M. Giorgi Martin Bringmann bjorn Usadel Staffan Persson Max-Planck-lnstitute for Molecular Plant Physiology Am Muhlenberg 1 14476 Potsdam Germany

Transcriptional coordination, or co-expression, of genes may signify functional relatedness of the corresponding proteins. For example, several genes involved in secondary cell wall cellulose biosynthesis are co-expressed with genes engaged in the synthesis of xylan, which is a major component of the secondary cell wall. To extend these types of analyses, we investigated the co-expression relationships of all Carbohydrate-Active enZYmes （CAZy）-related genes for Arabidopsis thaliana. Thus, the intention was to transcriptionally link different cell wall-related processes to each other, and also to other biological functions. To facilitate easy manual inspection, we have displayed these interactions as networks and matrices, and created a web-based interface （http：***） containing downloadable files for all the transcriptional associations.

关键词： Cell walls bioinformatics Arabidopsis co-expression.

Analysis of per-and polyfluoroalkyl substances(PFAS)extraction from contaminated firefighting materials:Effects of cleaning agent,temperature,and chain-length dependencies

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Emerging Contaminants 2024年第3期10卷 268-279页

作者： Sixten Dahlbom Fanny Bjarnemark bjorn Nguyen Sarunas Petronis Tove Mallin RISE Research Institute of Sweden Division Safety and TransportFire and Safety DepartmentBox 85750115BoråsSweden RISE Research Institute of Sweden Division Materials and ProductionChemistry and Applied Mechanics DepartmentBox 85750115BoråsSweden RISE Research Institute of Sweden Division Materials and ProductionMethodologyTextiles and Medical Technology DepartmentBox 85750115BoråsSweden

This investigation delves into the extraction dynamics of 22 per-and polyfluoroalkyl substances from PFAS contaminated firefighting *** distinct test sets were executed:one contrasting a commercial product with water following an elaborate decontamination procedure,and the other assessing seven washing agents on materials from firefighting installations,with one agent examined at 22℃and 50℃.A general tendency for improved desorption at the higher temperature was ***,a discernible influence of the cleaning agent's pH on the extraction of specific PFAS species was observed,elucidating the role of chemical environment in the extraction *** rebound was studied for a period of up to 157 days,this unveiled a gradual escalation in PFAS22 levels,indicative of a protracted desorption ***,PFAS with abbreviated carbon chains(C4-C6)exhibit superior desorption efficiency compared to their elongated congeners,suggesting a chain-lengthdependent decontamination potential.A comparative scrutiny between a commercially available cleaning product,featuring multiple washing and flushing steps,and a water-only treatment regimen underscores the potential efficacy of the *** exhaustive investigation furnishes nuanced insights into PFAS extraction complexities,offering a foundation for informed decontamination strategies.

关键词： PFAS Decontamination Firefighting foam Firefighting materials Cleaning

Exploratory study on bitumen content determination for foamed bitumen mixes based on porosity and indirect tensile strength

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Journal of Traffic and Transportation Engineering(English Edition) 2017年第2期4卷 131-144页

作者： May Namutebi bjorn Birgisson Alvaro Guarin Denis Jelagin Division of Highway and Railway Engineering KTH Royal Institute of Technology Stockholm Sweden Department of Civil and Environmental Engineering Makerere University Kampala Uganda

Optimum bitumen content determination is one of the major aims for foamed bitumen mix design. However, mix design procedures for foamed bitumen mixes are still under development. In this paper a method to determine the optimum bitumen content for given foamed bitumen mix based on primary aggregate structure porosity and indirect tensile strength criterion is proposed. Using packing theory concepts, the aggregate gradation is divided into three aggregate structures which are oversize, primary and secondary struc- tures. Porosity for the primary aggregate structure is determined for given bitumen contents. A maximum value for porosity of 50% for the primary aggregate structure is used to choose initial bitumen content. Furthermore, a minimum indirect tensile strength criteria is suggested to refine this bitumen content. This method enables a bitumen content value to be chosen prior to the start of experimental work, as porosity is expressed in terms of physical parameters such as aggregate and binder specific gravity, and aggregate gradation which are known before the mix design process. The bitumen content is then later refined when the indirect tensile strength is determined in the laboratory. This method would reduce resources such as time and materials that may be required during the mix design procedure.

关键词： Foamed bitumen Bitumen content Aggregate Porosity Gradation framework Indirect tensile strength

Alcohols for hydrate inhibition-Different alcohols and different mechanisms

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Petroleum 2022年第1期8卷 1-16页

作者： bjorn Kvamme Na Wei Jinzhou Zhao Shouwei Zhou Liehui Zhang Wantong Sun Navid Saeidi State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China State Key Laboratory of Natural Gas Hydrate Beijing10027China Hyzenenergy Laguna Hills92656USA Strategic Carbon LLC Portsmouth03801USA

Methanol has been used to prevent hydrate formation in industrial handling of hydrate forming mixtures containing water for many *** is also used for the same purpose in countries that have easy access to low price ethanol,like for instance *** to these small alcohols is that they also have surfactant properties that will promote hydrate formation,but when added to water in sufficient amounts,the hydrate prevention characteristics will *** alcohols will primarily prevent heterogeneous hydrate formation on the interface between water and a separate hydrate *** effect of“alcohol”on both of these routes to hydrate formation are investigated and compared to experimental *** particular we also investigate the effects of these small alcohols on Gibbs free energy for the hydrate formed on the new,shifted,stability *** free energy is generally higher than hydrate formed from pure *** of hydrate formation are also higher for hydrate formed from water containing *** are negative numbers,so in absolute values released formation enthalpy is *** presence of these alcohols in water will also prevent homogeneous hydrate formation from dissolved hydrate formers in *** have more important roles in other routes to hydrate *** hydrate nucleation towards mineral surfaces is feasible in different *** hydrate formers like H2S and CO_(2)can adsorb directly on rust,and as discussed here,are able to form hydrate from adsorbed state on rust ***-polar hydrocarbons like,for instance methane might get trapped in structured water and then nucleate to *** research on this is published and further research is in *** have very strong attraction to rust and corresponding chemical potentials for adsorbed glycols on rust are favourable enough to facilitate phase transition from glycols dissolved in water over to *** of glycol in gas

关键词： Hydrate Non-equilibrium Thermodynamics Alcohols Nucleation

Galaxy:A Decade of Realising CWFR Concepts

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Data Intelligence 2022年第2期4卷 358-371页

作者： Beatriz Serrano-Solano Anne Fouilloux Ignacio Eguinoa Matus Kalas bjorn Gruning Frederik Coppens Bioinformatics Group University of FreiburgBaden-Wurttemberg 79098Germany Department of Geosciences University of OsloOslo0316Norway Department of Plant Biotechnology and Bioinformatics Ghent UniversityGhent 9052Belgium VIB GentOost-Vlaanderen 9052Belgium Department of Informatics University of Bergen Ringgold standard institutionUniversity of BergenBergenHordaland 5008Norway

Despite recent encouragement to follow the FAIR principles,the day-to-day research practices have not changed *** to new developments and the increasing pressure to apply best practices,initiatives to improve the efficiency and reproducibility of scientific workflows are becoming more *** this article,we discuss the importance of well-annotated tools and the specific requirements to ensure reproducible research with FAIR *** detail how Galaxy,an open-source workflow management system with a web-based interface,has implemented the concepts that are put forward by the Canonical Workflow Framework for Research(CWFR),whilst minimising changes to the practices of scientific *** we showcase concrete applications from two different domains,this approach is generalisable to any domain and particularly useful in interdisciplinary research and science-based applications.

关键词： CWFR FAIR Tools Workflows Galaxy Metadata FDOs