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Giant anomalous Hall and Nernst effect in magnetic cubic Heusler compounds

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npj Computational Materials 2020年第1期6卷 1014-1021页

作者： jonathan Noky Yang Zhang Johannes Gooth Claudia Felser Yan Sun Max Planck Institute for Chemical Physics of Solids D-01187 DresdenGermany Massachusetts Institute of Technology CambridgeMA 02139USA

The interplay of magnetism and topology opens up the possibility for exotic linear response effects,such as the anomalous Hall effect and the anomalous Nernst effect,which can be strongly enhanced by designing a large Berry curvature in the electronic *** Heusler compounds are a promising class of materials for this purpose because they are versatile,show magnetism,and their electronic structure hosts strong topological ***,we provide a comprehensive study of the intrinsic anomalous transport for magnetic cubic full Heusler compounds and we illustrate that several Heusler compounds outperform the best so far reported *** results reveal the importance of symmetries,especially mirror planes,in combination with magnetism for giant anomalous Hall and Nernst effects,which should be valid in general for linear responses(spin Hall effect,spin orbital torque,etc.)dominated by intrinsic contributions.

关键词： structure Nernst cubic

Web-based visualization of large 3d urban building models

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International Journal of digital Earth 2014年第1期7卷 53-67页

作者： Liqiang Zhang Chunming Han Liang Zhang Xiaokun Zhang jonathan Li State Key Laboratory of Remote Sensing Science Beijing Normal UniversityBeijingChina The Center for Earth Observation and digital Earth Chinese Academy of ScienceBeijingChina department of Computer Science Beijing Electronic Science and Technology InstituteBeijingChina department of Geography and Environmental Management Faculty of EnvironmentUniversity of WaterlooWaterlooCanada

Adaptive rendering of large urban building models has become an important research issue in three-dimensional(3d)geographic information system(GIS)*** study explores a way for rendering web-based 3d urban building models.A client-server hybrid rendering approach is presented for large 3d city models,stored on a remote server through a *** approach combines an efficient multi-hierarchical building representation with a novel image-based method,3d image impostor generated on demand by a remote *** approach allows transferring complex scenes progressively while keeping high visualization *** also evaluated the rendering and data transferring performance of the proposed approach.

关键词： urban building models progressive transmission client-server hybrid 3d visualization

Thermal cycling creep properties of a directionally solidified superalloy dZ125

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Journal of Materials Science & Technology 2022年第9期104卷 269-284页

作者： Wenrui An Satoshi Utada Xiaotong Guo Stoichko Antonov Weiwei Zheng jonathan Cormier Qiang Feng Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Institut Pprime UPR CNRS 3346Department of Physics and Mechanics of MaterialsISAE-ENSMABP4010986961 Futuroscope Chasseneuil CedexFrance China Electronic Product Reliability and Environmental Testing Research Institute Guangzhou 510610China department of Microstructure Physics and Alloy design Max-Planck-Institut für Eisenforschung GmbHDüsseldorf 40237Germany

Aero-engine turbine blades may suffer overheating during service,which can result in severe microstructural and mechanical degradation within tens of *** this study,the thermal cycling creep under(950℃/15 min+1100℃/1 min)-100 MPa was performed on a directionally solidified superalloy,*** effects of overheating and thermal cycling on the creep properties were evaluated in terms of creep behavior and microstructural evolution against isothermally crept specimens under 950℃/100 MPa,950℃/270 MPa,and 1100℃/100 *** results indicated that the thermal cycling creep life was reduced dramatically compared to the isothermal creep under 950℃/100 *** plastic creep deformation mainly occurred during the overheating stage during the thermal cycling *** thermal cycling creep curve exhibited three stages,similar to the 1100℃isothermal creep,but its minimum creep rate occurred at a lower creep *** overheating events caused severe microstructural degradation,such as substantial dissolution ofγ'phase,earlier formation of raftedγ'microstructure,widening of theγchannels,and instability of the interfacial dislocation *** microstructural degradation was the main reason for the dramatic decrease in thermal cycling creep life,as the thermal cycling promoted more dislocations to cut intoγ'phase and more cracks to initiate at grain boundaries,carbides,and residual eutectic *** study underlines the importance of evaluating the thermal cycling creep properties of superalloys to be used as turbine blades and provides insights into the effect of thermal cycling on directionally solidified superalloys for component design.

关键词： directional solidified superalloy Thermal cycling creep Overheating Creep properties Microstructural degradation

Nutritional stimulation by in-ovo feeding modulates cellular proliferation and differentiation in the small intestinal epithelium of chicks

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Animal Nutrition 2022年第1期8卷 91-101页

作者： Naama Reicher Tal Melkman-Zehavi jonathan dayan Eric AWong Zehava Uni department of Animal Science The Robert H.SmithFaculty of AgricultureFood and EnvironmentThe Hebrew University of JerusalemRehovot 76100Israel department of Animal and Poultry Sciences Virginia TechBlacksburgVA 24061USA

Nutritional stimulation of the developing small intestine of chick embryos can be conducted by in-ovo feeding(IOF).We hypothesized that IOF of glutamine and leucine can enhance small intestinal development by promoting proliferation and differentiation of multipotent small intestinal epithelial *** embryos(n=128)were subject to IOF of glutamine(IOF-Gln),leucine(IOF-Leu),NaCl(IOF-NaCl)or no injection(control)at embryonic d 17(E 17).Multipotent,progenitor and differentiated cells were located and quantified in the small intestinal epithelium between E 17 and d 7 after hatch(d 7)in all treatment groups by immunofluorescence of SRY-box transcription factor 9(Sox9)and proliferating cell nuclear antigen(PCNA),in-situ hybridization of leucine-rich repeat containing G-protein coupled receptor 5(Lgr5)and peptide transporter 1(PepT1)and histochemical goblet cell *** effects of IOF treatments at E 19(48 h post-IOF),in comparison to control embryos,were as follows:total cell counts increased by 40%,33%and 19%,and multipotent cell counts increased by 52%,50%and 38%,in IOF-Gln,IOF-Leu and IOF-NaCl embryos,*** IOF-Gln embryos exhibited a significance,36%increase in progenitor cell *** IOF treatments shifted Lgr5+ stem cell localizations to villus *** differentiated,PepT1+region of the villi was 1.9 and 1.3-fold longer in IOF-Gln and IOF-Leu embryos,respectively,while goblet cell densities decreased by 20%in IOF-Gln ***,crypt and villi epithelial cell counts were significantly higher IOF-Gln chicks,compared to control chicks(Pde IOF of glutamine stimulates small intestinal maturation and functionality during the peri-hatch period by promoting multipotent cell proliferation and differentiation,resulting in enhanced compartmentalization of multipotent and differentiated cell niches and expansions of the absorptive surface area.

关键词： Chick Intestinal development Proliferation differentiation Multipotent cells In-ovo feeding

Cesarean Operative Reports: We Can do Better!

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Open Journal of Obstetrics and Gynecology 2021年第2期11卷 117-124页

作者： Sarah E. Goodheart jonathan d. Baum department of Obstetrics and Gynecology Jersey Shore University Medical Center Neptune USA

Background: The operative report is an essential component of communication, patient care, and safety;it is a JCAHO requirement and legal document. Almost 80% of residency program directors surveyed agreed on the importance of the operative report, yet less than 20% of programs provide formal resident training. Documentation has important implications in obstetrics as route and timing of future deliveries are often influenced by operative findings. Purpose: Examine completeness of cesarean operative reports using a validated instrument adapted from general surgery. Assess the impact of an educational resident in-service on the required elements and documentation in resident generated cesarean operative reports. Methods: A quality improvement project identified significant deficiencies in resident generated cesarean operative reports. We conducted a retrospective chart review of cesarean operative reports from November 2019 to May 2020 at Jersey Shore University Medical Center. Our study was conducted in three phases. In phase 1, a cohort of cesarean operative reports was examined using a structured evaluation tool. In phase 2, an educational resident in-service on standardization of operative notes was provided. In phase 3, another cohort of cesarean operative reports was examined using the same evaluation tool after the resident in-service. Analysis for improvement was performed. Results: Fifty pre and post-in-service cesarean operative report evaluations weredana;"> compared (N = 100). Inclusion of date of surgery significantly improved from 78% to 100%, p-value d inclusion

关键词： Cesarean documentation Notes Operative Resident

Superconductivity in antiperovskites

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npj Computational Materials 2022年第1期8卷 1424-1433页

作者： Noah Hoffmann Tiago F.T.Cerqueira jonathan Schmidt Miguel A.L.Marques Institut für Physik Martin-Luther-Universität Halle-WittenbergD-06099HalleGermany CFisUC Department of PhysicsUniversity of CoimbraRua Larga3004-516CoimbraPortugal

We present a comprehensive theoretical study of conventional superconductivity in cubic antiperovskites materials with composition XYZ_(3) where X and Z are metals,and Y is H,B,C,N,O,and *** starting point are electron–phonon calculations for 397 materials performed with density-functional perturbation *** 43%of the materials are dynamically unstable,we discovered 16 compounds close to thermodynamic stability and with T_(c) higher than 5 *** these results to train interpretable machine-learning models,leads us to predict a further 57(thermodynamically unstable)materials with superconducting transition temperatures above 5 K,reaching a maximum of 17.8 K for ***,the models give us an understanding of the mechanism of superconductivity in *** combination of traditional approaches with interpretable machine learning turns out to be a very efficient methodology to study and systematize whole classes of materials and is easily extendable to other families of compounds or physical properties.

关键词： properties theory perovskite

detrimental role of hydrogen evolution and its temperature-dependent impact on the performance of vanadium redox flow batteries

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Journal of Energy Chemistry 2019年第5期28卷 57-62页

作者： Abdulmonem Fetyan Gumaa A. El-Nagar Iver Lauermann Maike Schnucklake jonathan Schneider Christina Roth Institute for Chemistry and Biochemistry Freie Universitat BerlinTakustr.3D-14195 BerlinGermany Chemistry department Faculty of ScienceCairo UniversityCairo 12613Egypt Helmholtz-Zentrum Berlin fur Materialien und Energie Hahn-Meitner-Platz 114109 BerlinGermany

This paper addresses the damaging role of the parasitic hydrogen evolution reaction (HER) in the negative half-cell of a vanadium redox flow battery (VRFB) on state-of-the-art carbon felt electrodes at different temperatures. It was found that increasing the temperature resulted in a better catalytic performance for both the positive and negative half-cell reactions. In addition, increasing the temperature significantly enhanced the undesired HER at the negative side. Operating the VRFB cell at higher temperature led to a decrease in the coulombic efficiency attributed to the higher hydrogen production. More pronounced hydrogen production caused an oxidation on the surface of the carb on fibers and a degradation of the electrode as indicated from scanning electron microscopy and X-ray photoelectron spectroscopy measurements. This observed degradation results in fading of the overall performance of the vanadium redox flow battery over time.

关键词： Hydrogen evolution Carbon felt degradation Electrode Redox flow batteries

Computational screening of materials with extreme gap deformation potentials

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npj Computational Materials 2022年第1期8卷 1482-1491页

作者： Pedro Borlido jonathan Schmidt Hai-Chen Wang Silvana Botti Miguel A.L.Marques Institut für Festkörpertheorie und-optik Friedrich-Schiller-Universität Jena and European Theoretical Spectroscopy FacilityMax-Wien-Platz 107743JenaGermany CFisUC Department of PhysicsUniversity of CoimbraRua Larga3004-516CoimbraPortugal Institut für Physik Martin-Luther-Universität Halle-WittenbergD-06099HalleGermany

In this work,we present a large-scale study of gap deformation potentials based on density-functional theory calculations for over 5000 *** expected,in most cases the band gap decreases for increasing volume with deformation potentials that can reach values of almost−15 *** find,however,also a sizeable number of materials with positive deformation *** members of this group are halide perovskites,known for their applications in *** then focus on understanding the physical reasons for so different values of the deformation potentials by investigating the correlations between this property and a large number of other material and compositional *** also train explainable machine learning models as well as graph convolutional networks to predict deformation potentials and establish simple rules to understand predicted ***,we analyze in more detail a series of materials that have record positive and negative deformation potentials.

关键词： deformation properties. extreme

An Analysis of Soil Coring Strategies to Estimate Root depth in Maize(Zea mays)and Common Bean(Phaseolus vulgaris)

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Plant Phenomics 2020年第1期2卷 347-366页

作者： James d.Burridge Christopher K.Black Eric A.Nord Johannes A.Postma Jagdeep S.Sidhu Larry M.York jonathan P.Lynch The Pennsylvania State University Department of Plant ScienceTyson BuildingUniversity ParkPA 16802USA department of Biology Greenville University315 E.College AveGreenvilleIL 62246USA Forschungszentrum Jülich GmbH Institute of Bio-and Geosciences-Plant Sciences(IBG-2)52425 JülichGermany Noble Research Institute LLC2510 Sam Noble ParkwayArdmoreOK 73401USA

A soil coring protocol was developed to cooptimize the estimation of root length distribution(RLd)by depth and detection of functionally important variation in root system architecture(RSA)of maize and *** functional-structural model OpenSimRoot was used to perform in silico soil coring at six locations on three different maize and bean RSA *** were compared to two seasons of field soil coring and one *** one-sided T-test(TOST)analysis of in silico data suggests a between-row location 5 cm from plant base(location 3),best estimates whole-plot RLd/d of deep,intermediate,and shallow RSA phenotypes,for both maize and *** discriminant analysis indicates location 3 has~70%categorization accuracy for bean,while an in-row location next to the plant base(location 6)has~85%categorization accuracy in *** of field data suggests the more representative sampling locations vary by year and *** silico and field studies suggest location 3 is most robust,although variation is significant among seasons,among replications within a field season,and among field soil coring,trench,and *** propose that the characterization of the RLd profile as a dynamic rhizo canopy effectively describes how the RLd profile arises from interactions among an individual plant,its neighbors,and the pedosphere.

关键词： mays soil Root