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妇人的梦境,英雄的宿命与覆灭的王国——对《尼伯龙人之歌》中梦境叙述的分析

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德语人文研究 2017年第2期 62-70页

作者： benjamin van well DAAD 北京大学德语系

英雄史诗《尼伯龙人之歌》(约1200年)中有四段关于梦境的描写,它们都对之后的情节起到预示作用。本文从不同的叙事方式以及人物反应、情节发展、意义产出三者之间的关系入手,对史诗中的梦境进行了较为系统的研究。从叙事角度来看,史诗... 详细信息

英雄史诗《尼伯龙人之歌》(约1200年)中有四段关于梦境的描写,它们都对之后的情节起到预示作用。本文从不同的叙事方式以及人物反应、情节发展、意义产出三者之间的关系入手,对史诗中的梦境进行了较为系统的研究。从叙事角度来看,史诗中的人物对于这些梦境的反应不完全遵循逻辑,但是都具有推动情节发展的作用。通过这些梦境,史诗塑造了一种"毁灭的机制",将所有情节的发展都预先注定,也使所有角色的行动都与情节的发展方向保持一致。这些梦境中所出现的母题和意象在中世纪文学中都具有象征意义,对人物形象和文本主旨有揭示作用。最后,梦境指出了爱情(minne)、忠诚(triuwe)、痛苦(leit)和复仇(rache)之间存在的联系。

关键词：《尼伯龙人之歌》中世纪史诗梦境描写

Bayesian Model Calibration with Interpolating Polynomials based on Adaptively Weighted Leja Node

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Communications in Computational Physics 2020年第1期27卷 33-69页

作者： Laurent van den Bos benjamin Sanderse Wim Bierbooms Gerard van Bussel Centrum Wiskunde&Informatica P.O.Box 940791090 GBAmsterdamThe Netherlands Delft University of Technology P.O.Box 52600 AADelftThe Netherlands

An efficient algorithm is proposed for Bayesian model calibration,which is commonly used to estimate the model parameters of non-linear,computationally expensive models using measurement *** approach is based on Bayesian statistics:using a prior distribution and a likelihood,the posterior distribution is obtained through application of Bayes’*** novel algorithm to accurately determine this posterior requires significantly fewer discrete model evaluations than traditional Monte Carlo *** key idea is to replace the expensive model by an interpolating surrogate model and to construct the interpolating nodal set maximizing the accuracy of the *** determine such a nodal set an extension to weighted Leja nodes is introduced,based on a new weighting *** prove that the convergence of the posterior has the same rate as the convergence of the *** the convergence of the posterior is measured in the Kullback–Leibler divergence,the rate *** algorithm and its theoretical properties are verified in three different test cases:analytical cases that confirm the correctness of the theoretical findings,Burgers’equation to show its applicability in implicit problems,and finally the calibration of the closure parameters of a turbulence model to show the effectiveness for computa-tionally expensive problems.

关键词： Bayesian model calibration interpolation Leja nodes surrogate modeling

Taking silicon photonics modulators to a higher performance level: state-of-the-art and a review of new technologies

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Advanced Photonics 2021年第2期3卷 38-60页

作者： Abdul Rahim Artur Hermans benjamin Wohlfeil Despoina Petousi Bart Kuyken Dries van Thourhout Roel Baets Ghent University Photonics Research GroupDepartment of Information TechnologyGhentBelgium Ghent University IMEC and Center for Nano-and BiophotonicsGhentBelgium ADVA Optical Networking BerlinGermany

Optical links are moving to higher and higher transmission speeds while shrinking to shorter and shorter ranges where optical links are envisaged even at the chip *** scaling in data speed and span of the optical links demands modulators to be concurrently performant and *** photonics(SiPh),a photonic integrated circuit technology that leverages the fabrication sophistication of complementary metal-oxide-semiconductor technology,is well-positioned to deliver the performance,price,and manufacturing volume for the high-speed modulators of future optical communication *** has relied on the plasma dispersion effect,either in injection,depletion,or accumulation mode,to demonstrate efficient high-speed *** high-speed plasma dispersion silicon modulators have been commercially deployed and have demonstrated excellent *** years have seen a paradigm shift where the integration of various electro-refractive and electro-absorptive materials has opened up additional routes toward performant SiPh *** modulators are in the early years of their *** promise to extend the performance beyond the limits set by the physical properties of *** focus of our study is to provide a comprehensive review of contemporary(i.e.,plasma dispersion modulators)and new modulator implementations that involve the integration of novel materials with SiPh.

关键词： high-speed modulators silicon photonics plasma dispersion effect ferroelectrics graphene III-V on Si organic(electro-optic)materials.

Prediction of sediment yield of the Inxu River catchment (South Africa)using the MUSLE

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International Soil and Water Conservation Research 2021年第1期9卷 37-48页

作者： David Gwapedza Namso Nyamela Denis Arthur Hughes Andrew Robert Slaughter Sukhmani Kaur Mantel benjamin van der Waal Institute for Water Research Rhodes University P.O.Box 94GrahamstownEastern CapeSouth Africa Geography Department Rhodes University P.O.Box 94GrahamstownEastern CapeSouth Africa

The proposed site for the construction of a new dam(Laleni Dam)on the Tsitsa River in the Eastern Cape,South Africa falls within a high soil erosion zone,which is expected to affect the lifespan of the *** the sediment yield of the catchment is important from a management perspective,and thus we designed this study to assess the applicability of the Modified Universal Soil Loss Equation(MUSLE).The original MUSLE was applied to the Inxu River sub catchment,upstream of a proposed dam,over a summer rainfall period extending from October 2016 to April 2017.A modified version of the MUSLE,incorporating a storage module,was later applied over the same *** calibration of the MUSLE with and without a storage model was tested against 7 months of recorded daily suspended sediment discharge *** a storage model,we achieved a percentage bias,coefficient of efficiency and R2 of 2%,0.83 and 0.83,respectively,while without storage the performance statistics were markedly *** results suggest that a calibrated MUSLE can provide estimates of sediment yield that are valuable for regional planning,and that the inclusion of a storage component further improves the MUSLE *** the complexity of sediment generation and transport processes,a relatively simple empirical MUSLE model is a useful tool for initial sediment yield estimation for planning purposes.

关键词： MUSLE Storage component Sediment yield Erosion South Africa Inxu river

Cation engineering on lead iodide perovskites for stable and high-performance photovoltaic applications

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Journal of Energy Chemistry 2018年第4期27卷 1017-1039页

作者： Jue Gong Peijun Guo Savannah E.benjamin P.Gregory van Patten Richard D.Schaller Tao Xu Department of Chemistry and Biochemistry Northern Illinois UniversityDeKalbIL 60115USA Center for Nanoscale Materials Argonne National Laboratory9700 South Cass AvenueLemontIL 60439USA Department of Chemistry Middle Tennessee State UniversityMurfreesboroTN 37132USA

Perovskite solar cells （PSCs） based on methylammonium lead iodide （CH3NH3PbI3） have shown unprecedentedly outstanding performance in the recent years. Nevertheless, due to the weak interaction between polar CH3NH3＋（MA＋） and inorganic PbI3 sublattices, CH3NH3PbI3 dramatically suffers from poor moisture stability, thermal decomposition and device hysteresis. As such, strong electrostatic interactions between cations and anionic frameworks are desired for synergistic improvements of the abovementioned issues. While replacements of I with Br and/or CI evidently widen optical bandgaps of perovskite materials, compositional modifications can solely be applied on cation components in order to preserve the broad absorption of solar spectrum. Herein, we review the current successful practices in achieving efficient, stable and minimally hysteretic PSCs with lead iodide perovskite systems that employ photoactive cesium lead iodide （CsPbI3）, formamidinium lead iodide （HC（NH2）2PbI3, or FAPbI3）, MA1-x y-zFAxCsyRbzPbI3 mixed-cation settings as well as two-dimensional butylammonium （C4H9NH3＋, or BA＋）/MA＋, polymeric ammonium （PEI＋）/MA＋ co-cation layered structures. Fundamental aspects behind the stabilization of perovskite phases α-CsPbi3, α-FAPbI3, mixed-cation MA1-x-y-zFAxCsyRb2PbI3 and crystallographic alignment of （BA）2（MA）3Pb4I13 for effective light absorption and charge transport will be discussed. This review will contribute to the continuous development of photovoltaic technology based on PSCs.

关键词： Solar energy conversion Perovskite solar cells Power conversion efficiency Optical bandgaps Device hysteresis Metastabte phases

Improving photosynthetic efficiency toward food security:Strategies,advances,and perspectives

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Molecular Plant 2023年第10期16卷 1547-1563页

作者： Edward N.Smith Marvin van Aalst Tiina Tosens Ülo Niinemets benjamin Stich Tomas Morosinotto Alessandro Alboresi Tobias J.Erb Paul AGómez-Coronado Dimitri Tolleter Giovanni Finazzi Gilles Curien Matthias Heinemann Oliver Ebenhöh Julian M.Hibberd Urte Schlüter Tianshu Sun Andreas P.M.Weber Faculty of Science and Engineering Molecular Systems Biology–Groningen Biomolecular Sciences and BiotechnologyNijenborgh 49747 AG Groningenthe Netherlands Institute of Quantitative and Theoretical Biology Cluster of Excellence on Plant Science(CEPLAS)Heinrich Heine UniversityUniversitätsstrasse 140225 DüsseldorfGermany Institute of Agricultural and Environmental Sciences Estonian University of Life Sciences51006 TartuEstonia Institute of Quantitative Genetics and Genomics of Plants Cluster of Excellence on Plant Science(CEPLAS)Heinrich Heine UniversityUniversitätsstrasse 140225 DüsseldorfGermany Department of Biology University of Padova35131 PadovaItaly Max Planck Institute for Terrestrial Microbiology Department of Biochemistry&Synthetic Metabolism35043 MarburgGermany Interdisciplinary Research Institute of Grenoble IRIG-LPCVGrenoble Alpes UniversityCNRSCEAINRAE38000 GrenobleFrance Molecular Physiology Department of Plant SciencesUniversity of CambridgeCambridge CB23EAUK Institute for Plant Biochemistry Cluster of Excellence on Plant Science(CEPLAS)Heinrich Heine UniversityUniversitätsstrasse 140225 DüsseldorfGermany Institute for Breeding Research on Agricultural Crops Federal Research Center for Cultivated Plants18190 SanitzGermany

Photosynthesis in crops and natural vegetation allows light energy to be converted into chemical energy and thus forms the foundation for almost all terrestrial trophic networks on *** efficiency of photosynthetic energy conversion plays a crucial role in determining the portion of incident solar radiation that can be used to generate plant biomass throughout a growth ***,alongside the factors such as resource availability,crop management,crop selection,maintenance costs,and intrinsic yield potential,photosynthetic energy use efficiency significantly influences crop *** efficiency is relevant to sustainability and food security because it affects water use efficiency,nutrient use efficiency,and land use *** review focuses specifically on the potential for improvements in photosynthetic efficiency to drive a sustainable increase in crop *** discuss bypassing photorespiration,enhancing light use efficiency,harnessing natural variation in photosynthetic parameters for breeding purposes,and adopting new-to-nature approaches that show promise for achieving unprecedented gains in photosynthetic efficiency.

关键词： photosynthesis photorespiration photorespiratory bypass natural variation synthetic biology plant metabolic engineering

In vitro growth of gut microbiota with selenium nanoparticles

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Animal Nutrition 2019年第4期5卷 424-431页

作者： Sheeana Gangadoo benjamin W.Bauer Yadav S.Bajagai Thi Thu Hao van Robert J.Moore Dragana Stanley Institute for Future Farming Systems Central Queensland UniversityRockhamptonQueensland4702Australia Poultry Cooperative Research Centre University of New England ArmidaleNew South Wales2315Australia School of Health Medical and Applied SciencesCentral Queensland UniversityRockhamptonQueensland4702Australia RMIT University School of ScienceBundooraVictoria3083Australia

The application of nanoparticles rose steeply in the last decade,where they have become a common ingredient used in processed human food,improving food properties such as shelf life and *** have also attracted considerable interest to the livestock industry,due to their efficacy in intestinal pathogen control,with the regulatory and consumer driven push for the removal of antibiotic growth *** influence of selenium(Se) nanoparticles was investigated on a diverse and mature broiler caecal microbiota using in vitro culturing and 16 S rRNA gene sequencing methods for microbiota *** microbiota was collected from 4 traditionally grown heritage roosters and grown for 48 h,in the presence and absence of Se nanoparticles,with 2 technical replicates *** effect of rooster as a biological variable strongly overpowered the effects of nano-Se in the media,resulting in moderate effects on the structure and diversity of the caecal microbial *** the nanoparticles showed a significant reduction(P <0.05) in the abundance of an emerging poultry pathogen,Enterococcus cecorum identical operational taxonomic units(OTU),which could be of notable interest in poultry production for targeted *** control without significant disturbance to the total microbial community.

关键词： Nanoparticle Microbiota Enterococcus cecorum Short-chain fatty acids Livestock

Multi-chromatic silicon nanocrystals

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Light(Science & Applications) 2017年第1期6卷 721-728页

作者： benjamin Bruhn benjamin JM Brenny Sidoeri Dekker Ilker Doğan Peter Schall Katerina Dohnalová van der Waals-Zeeman Institute University of AmsterdamScience Park 904Amsterdam 1098 XHThe Netherlands Center for Nanophotonics AMOLFScience Park 104Amsterdam 1098 XGThe Netherlands Department of Applied Physics Eindhoven University of TechnologyP.O.Box 512Eindhoven 5600 MBThe Netherlands Dutch Institute for Fundamental Energy Research(DIFFER) P.O.Box 6336Eindhoven 5600 HHThe Netherlands

Silicon nanocrystals(SiNCs)have great potential to become environmental friendly alternatives to heavy-metal containing nanocrystals for applications including medical imaging,lighting and *** exhibit excellent photostability,non-toxicity and abundant resources,but their often reported inefficient and spectrally limited light emission seriously impair their *** we demonstrate a new method that converts SiNCs into an efficient and robust multi-chromatic ***~15 keV electron-beam irradiation of oxide-capped SiNCs,we introduce several types of color centers into the nanocrystal’s oxide shell with efficient blue,green and red emission bands,together yielding warm-white photoluminescence,even for a single *** centers are not native to the original system and we relate them to known defects in *** in the silica host,however,here the centers are efficiently optically *** further optimization and up-scaling of this method,e-beam irradiated SiNCs can be of great interest as white phosphors for applications such as LEDs.

关键词： cathodoluminscence color center electron beam multi-chromaticity silicon nanocrystals

Sedimentation acceleration of remanent iron oxide by magnetic flocculation

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China Particuology 2007年第1期5卷 145-150页

作者： Mathias Stolarski Christian Eichholz benjamin Fuchs Hermann Nirschl Institute of Mechanical Process Engineering and Mechanics (MVM) University of Karlsruhe 76131 Karlsruhe Germany DuPont Experimental Station Building E304 Wilmington DE 19880 USA

Sedimentation based processes are widely used in industry to separate particles from a liquid phase. Since the advent of the ＂Nanoworld＂ the demand for effective separation technologies has rapidly risen, calling for the development of new separation concepts, one of which lies in hybrid separation using the superposition of a magnetic field for magnetic particles. Possible product portfolio of such separation consists of pigment production, nanomagnetics production for electronics and bio separation, A promising step in that direction is magnetic field enhanced cake filtration, which has by now progressed from batch to continuous ooeration. In sedimentation processes in a mass force field the settling behaviour of particles strongly depends on physico-chemical properties, concentration and size distribution of the particles. By adjusting the pH, the interparticle forces, in particular the electrostatic repulsion, can be manipulated. For remanent magnetic particles such as magnetite, pre-treatment in a magnetic field could lead to a change of interparticle interactions. By magnetizing the particles apart from van der Waals attraction and electrostatic repulsion, an additional potential is induced, the magnetic attraction, which could easily dominate the other potentials and result in agglomeration in the primary minimum. By sedimentation analysis, a wide spectrum of parameters like pH, magnetic field strength and concentration have been investigated. The results show a strong increase of sedimentation velocity by magnetic flocculation of the raw suspension. This leads to a rise in throughput due to the acceleration of sedimentation kinetics by imparting a non-chemical interaction to the physico-chemical properties in the feed stream of the separation apparatus.

关键词： Magnetic flocculation Field enhanced separation Cake filtration Magnetic structuring Magnetic separation