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Annealing-induced long-range charge density wave order in magnetic kagome FeGe:Fluctuations and disordered structure

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Science China(Physics,Mechanics & Astronomy) 2024年第11期Mechanics & Astronomy) .卷 116-125页

作者： Chenfei Shi Yi Liu Bishal Baran Maity Qi Wang Surya Rohith Kotla Sitaram Ramakrishnan Claudio Eisele Harshit Agarwal Leila Noohinejad Qian Tao Baojuan Kang Zhefeng Lou Xiaohui Yang Yanpeng Qi Xiao Lin Zhu-An Xu Arumugam Thamizhavel Guang-Han Cao sander van smaalen Shixun Cao Jin-Ke Bao Department of Physics Materials Genome Institute Institute for Quantum Science and TechnologyShanghai University Key Laboratory of Quantum Precision Measurement of Zhejiang Province School of Physics Zhejiang University of Technology School of Physics Zhejiang University Department of Condensed Matter Physics and Materials Science Tata Institute of Fundamental Research School of Physical Science and Technology ShanghaiTech University ShanghaiTech Laboratory for Topological Physics ShanghaiTech University Laboratory of Crystallography University of Bayreuth Department of Quantum Matter AdSE Hiroshima University P24 PETRA Ⅲ Deutsches Elektronen-Synchrotron DESY Key Laboratory for Quantum Materials of Zhejiang Province School of Science Westlake University Department of Physics China Jiliang University Shanghai Key Laboratory of High-resolution Electron Microscopy ShanghaiTech University Collaborative Innovation Centre of Advanced Microstructures Nanjing University Shanghai Key Laboratory of High Temperature Superconductors Shanghai University School of Physics Hangzhou Normal University

Charge density wave（CDW） in kagome materials with the geometric frustration is able to carry unconventional ***, a CDW has been observed below the antiferromagnetic order in kagome FeGe, in which magnetism and CDW are intertwined to form an emergent quantum ground state. However, the CDW is only short-ranged and the structural modulation originating from it has yet to be determined experimentally. Here we realize a long-range CDW order by post-annealing process,and resolve the structure model through single crystal X-ray diffraction. Occupational disorder of Ge resulting from short-range CDW correlations above TCDWis identified from structure refinements. The partial dimerization of Ge along the c axis is unveiled to be the dominant distortion for the CDW. Occupational disorder of Ge is also proved to exist in the CDW phase due to the random selection of partially dimerized Ge sites. Our work provides useful insights for understanding the unconventional nature of the CDW in FeGe.

关键词： charge density wave kagome disordered structure fluctuations

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Synthesis, crystal structure and thermal analysis of a new stilbazolium salt crystal

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Frontiers of Materials Science 2015年第2期9卷 147-150页

作者： Bing TENG Weijin KONG Ke FENG Fei YOU Lifeng CAO Degao ZHONG Lun HAO Qing SUN sander van smaalen Wenhui GONG College of Physics Qingdao University Qingdao 266071 China Key Laboratory of Photonics Materials and Technology in Universi~iesof Shand'ongl Qingdao 266071 China Laboratory of Crystallography Universityof Bayreuth D-95440 BayreuihGermany

A new organic crystal of 4-N, N-dimethylamino-4＇-N＇-methyl-stilbazolium benzene sulfonate （DASBS） was synthesized and characterized for the first time. It is a derivative of 4-N, N-dimethylamino-4＇-N＇-methyl-stilbazolium tosylate （DAST） with the benzene sulfonate replacing p-toluenesulfonate. Single crystal XRD demonstrated that the crystal structure of DASBS. H20 was triclinic. The thermal analysis of this new crystal was also conducted, and the melting point was obtained to be 232℃.

关键词： organic crystal crystal growth single crystal X-ray diffraction thermalanalysis

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Machine learning potentials for metal-organic frameworks using an incremental learning approach

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npj Computational Materials 2023年第1期9卷 2147-2154页

作者： sander vandenhaute Maarten Cools-Ceuppens Simon DeKeyser Toon Verstraelen Veronique van Speybroeck Center for Molecular Modeling Ghent UniversityTechnologiepark 469052 ZwijnaardeBelgium

Computational modeling of physical processes in metal-organic frameworks(MOFs)is highly challenging due to the presence of spatial heterogeneities and complex operating conditions which affect their *** functional theory(DFT)may describe interatomic interactions at the quantum mechanical level,but is computationally too expensive for systems beyond the nanometer and picosecond ***,we propose an incremental learning scheme to construct accurate and data-efficient machine learning potentials for *** scheme builds on the power of equivariant neural network potentials in combination with parallelized enhanced sampling and on-the-fly training to simultaneously explore and learn the phase space in an iterative *** only a few hundred single-point DFT evaluations per material,accurate and transferable potentials are obtained,even for flexible frameworks with multiple structurally different *** incremental learning scheme is universally applicable and may pave the way to model framework materials in larger spatiotemporal windows with higher accuracy.

关键词： framework incremental neural

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Adeno-associated virus mediated delivery of Tregitope 167 ameliorates experimental colitis

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World Journal of Gastroenterology 2012年第32期18卷 4288-4299页

作者： sander van der Marel Anna Majowicz Karin Kwikkers Richard van Logtenstein Anje A te Velde Anne S De Groot Sybren L Meijer sander J van Deventer Harald Petry Daniel W Hommes Valerie Ferreira Department of Research and Development uniQure B.V.1105 BA AmsterdamThe Netherlands Department of Gastroenterology and Hepatology Leiden University Medical Center2333 ZA LeidenThe Netherlands Tytgat Institute for Liver and Intestinal Research Academic Medical CenterUniversity of Amsterdam1105 BK AmsterdamThe Netherlands EpiVax Inc. ProvidenceRI 02903United States The Institute for Immunology and Informatics University of Rhode IslandKingstonRI 02881United States Department of Pathology Academic Medical CenterUniversity of Amsterdam1105 AZ AmsterdamThe Netherlands Center for Inflammatory Bowel Diseases UCLA Health SystemLos AngelesCA 90095United States

AIM:To explore the anti-inflammatory potential of adeno-associated virus-mediated delivery of Tregitope 167 in an experimental colitis ***:The trinitrobenzene sulfonate(TNBS) model of induced colitis was used in Balb/c *** after intravenous adeno-associated virusmediated regulatory T-cell epitopes(Tregitope) delivery,acute colitis was initiated by intra-rectal administration of 1.5 mg TNBS in 40% ethanol followed by a second treatment with TNBS(0.75 mg in 20% ethanol) 8 d *** groups included mice not treated with TNBS(healthy control group) and mice treated by TNBS only(diseased group).At the time of sacrifice colon weight,the disease activity index and histology damage score were *** staining of the colonic tissues was performed to asses the cellular infiltrate and the presence of transcription factor forkhead Box-P3(Foxp3).Thymus,mesenteric lymph nodes,liver and spleen tissue were collected and the corresponding lymphocyte populations were further assessed by flow cytometry analysis for the expression of CD4+ T cell and regulatory T cell associated ***:The Tregitope 167 treated mice gained an average of 4% over their initial body weight at the time of *** contrast,the mice treated with TNBS alone(no Tregitope) developed colitis,and lost 4% of their initial body weight at the time of sacrifice(P < 0.01).The body weight increase that had been observed in the mice pre-treated with Tregitope 167 was substantiated by a lower disease activity index and a decreased colon weight as compared to the diseased control group(P < 0.01 and P < 0.001,respectively).Immunohistochemical staining of the colonic tissues for CD4+ showed that inflammatory cell infiltrates were present in TNBS treated mice with or without administration with tregitope 167 and that these cellular infiltrates consisted mainly of CD4+ *** both TNBS treated groups CD4+ T cell infiltrates were observed in the sub-epithelia

关键词： Adeno-associated virus Regulatory T cell epitope Inflammatory bowel diseases Adeno-associated virus

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Manipulation of the Bitcoin market:an agent-based study

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Financial Innovation 2022年第1期8卷 1597-1625页

作者： Peter Fratrič Giovanni Sileno sander Klous Tom van Engers Informatics Institute University of AmsterdamAmsterdamThe Netherlands Leibniz Institute TNO/University of AmsterdamAmsterdamThe Netherlands

Fraudulent actions of a trader or a group of traders can cause substantial disturbance to the market,both directly influencing the price of an asset or indirectly by misin-forming other market *** behavior can be a source of systemic risk and increasing distrust for the market participants,consequences that call for viable *** on the foundations provided by the extant literature,this study aims to design an agent-based market model capable of reproducing the behavior of the Bitcoin market during the time of an alleged Bitcoin price manipulation that occurred between 2017 and early *** model includes the mechanisms of a limit order book market and several agents associated with different trading strategies,including a fraudulent agent,initialized from empirical data and who performs market *** model is validated with respect to the Bitcoin price as well as the amount of Bitcoins obtained by the fraudulent agent and the traded *** results provide a satisfactory fit to historical *** price dips and volume anomalies are explained by the actions of the fraudulent trader,completing the known body of evidence extracted from blockchain *** model suggests that the presence of the fraudulent agent was essential to obtain Bitcoin price development in the given time period;without this agent,it would have been very unlikely that the price had reached the heights as it did in late *** insights gained from the model,especially the connection between liquidity and manipulation efficiency,unfold a discussion on how to prevent illicit behavior.

关键词： Agent-based modelling Cryptocurrency Market manipulation Liquidity Bitcoin

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Safety and biodegradability of a synthetic dural sealant patch(Liqoseal)in a porcine cranial model

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Animal Models and Experimental Medicine 2021年第4期4卷 398-405页

作者： Ahmet Kinaci Wilhelmina Bergmann sander van Thoor Saskia Redegeld Albert van der Zwan Tristan P.C.van Doormaal Department of Neurology and Neurosurgery Brain CenterUniversity Medical Centre UtrechtUtrechtThe Netherlands Brain Technology Institute UtrechtThe Netherlands Division of Pathology Faculty of Veterinary MedicineUtrecht UniversityUtrechtThe Netherlands Department of Neurosurgery Clinical Neuroscience CenterUniversity Hospital ZurichZurichSwitzerland

Background:Liqoseal consists of a watertight layer of poly(ester)ether urethane and an adhesive layer containing polyethylene glycol-N-hydroxysuccinimide(PEG-NHS).It is designed to prevent cerebrospinal fluid(CSF)leakage after intradural *** study assessed the safety and biodegradability of Liqoseal in a porcine craniotomy ***:In 32 pigs a craniotomy plus durotomy was *** 15 pigs Liqoseal was implanted,in 11 control pigs no sealant was implanted and in 6 control pigs a control dural sealant(Duraseal or Tachosil)was *** safety of Liqoseal was evaluated by clinical,MRI and histological *** degradation of Liqoseal was histologically ***:Liqoseal,2 mm thick before application,did not swell and significantly was at maximum mean thickness of 2.14(±0.37)mm at one *** foreign body reaction induced by Liqoseal,Duraseal and Tachosil were *** showed no adherence to the arachnoid layer and was completely resorbed between 6 and 12 months *** one animal with Liqoseal,an epidural fluid collection containing CSF could not be ***:Liqoseal seems to be safe for intracranial use and is *** safety and performance in humans needs to be further assessed in clinical trials.

关键词： cerebrospinal fluid leakage craniotomy dura in vivo model sealant

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Histological and magnetic resonance imaging assessment of Liqoseal in a spinal in vivo pig model

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Animal Models and Experimental Medicine 2023年第1期6卷 74-80页

作者： Emma M.H.Slot Wilhelmina Bergmann Ahmet Kinaci Bart de Boer Nizar Moayeri Saskia Redegeld sander van Thoor Tristan P.C.van Doormaal Department of Neurology and Neurosurgery University Medical Center UtrechtUtrechtthe Netherlands Department of Translational Neuroscience Brain CenterUniversity Medical Center UtrechtUtrechtthe Netherlands Department of Biomolecular Health Sciences Division of PathologyFaculty of Veterinary MedicineUtrecht UniversityUtrechtthe Netherlands Department of Neurosurgery Elizabeth TweeSteden ziekenhuisTilburgthe Netherlands Brain Technology Institute Utrechtthe Netherlands Department of Neurosurgery Clinical Neuroscience CenterUniversity Hospital ZurichZurichSwitzerland

Background:Liqoseal (Polyganics,B.V.) is a dural sealant patch for preventing postoperative cerebrospinal fluid (CSF) *** has been extensively tested preclinically and CE (Conformite Européenne) approved for human use after a first cranial in-human ***,the safety of Liqoseal for spinal application is still *** aim of this study was to assess the safety of spinal Liqoseal application compared with cranial application using histology and magnetic resonance imaging ***:Eight female Dutch Landrace pigs underwent laminectomy,durotomy with standard suturing and Liqoseal *** control animals underwent the same procedure without sealant *** histological characteristics and imaging characteristics of animals with similar survival times were compared to data from a previous cranial porcine ***:Similar foreign body reactions were observed in spinal and cranial *** foreign body reaction consisted of neutrophils and reactive fibroblasts in the first3 days,changing to a chronic granulomatous inflammatory reaction with an increasing number of macrophages and lymphocytes and the formation of a fibroblast layer on the dura by day *** Liqoseal plus dura thickness reached a maximum of 1.2mm(range 0.7-2.0mm) at day ***:The spinal dural histological reaction to Liqoseal during the first 7days was similar to the cranial dural *** did not swell significantly in both application areas over *** the current lack of a safe and effective dural sealant for spinal application,we propose that an in-human safety study of Liqoseal is the logical next step.

关键词： reaction resonance magnetic

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Three-dimensional modeling with national coverage:case of The Netherlands

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Geo-Spatial Information Science 2013年第4期16卷 267-276页

作者： Jantien STOTER Linda van den BRINK Jakob BEETZ Hugo LEDOUX Marcel REUVERS Paul JANSSEN Friso PENNING George VOSSELMAN sander OUDE ELBERINK Kadaster Hofstraat 1107311ApeldoornThe Netherlands OTB-Section GIS Technology)Delft University of Technology Jaffalaan 92600 AADelftKZThe Netherlands Geonovum Barchman Wuytierslaan 103818 LH AmersfoortThe Netherlands Department of the Built Environment Eindhoven University of TechnologyVRT 9.08Postbus 5135600 MBEindhovenThe Netherlands Department GeoInformation City of The HagueThe Netherlands Faculty of Geo-Information Science and Earth Observation–ITC University of TwenteHengelosestraat 997514 AEEnschedeThe Netherlands

Three-dimensional technologies have matured over the *** the same time,3D information is becoming increasingly important in many *** it is not straightforward to apply the solutions that work on prototypes,small areas or for specific projects to 3D modeling of a whole *** the Netherlands,two initiatives are ongoing to address the issues of nation-wide 3D ***,the initiative that aims at establishing and implementing a national 3D standard for large-scale topography with support of all *** and maintaining the large-scale data are the responsibility of local governments(mainly municipalities).The second initiative is led by the Kadaster(the organization responsible for topographic mapping in the Netherlands)and aims at automatically generating a 3D version of the 1:10 k object-oriented data-set based on a smart combination of the two-dimensional data with high-resolution laser *** initiatives are presented in this paper including results,open issues,and future plans.

关键词： 3D modeling 3D standard country wide 3D mapping

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Towards Quantitatively Understanding the Complexity of Social-Ecological Systems——From Connection to Consilience

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International Journal of Disaster Risk Science 2017年第4期8卷 343-356页

作者： Xiao-Bing Hu Peijun Shi Ming Wang Tao Ye Mark S.Leeson sander E.van der Leeuw Jianguo Wu Ortwin Renn Carlo Jaeger State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Academy of Disaster Reduction and Emergency Management Beijing Normal University School of Engineering University of Warwick Key Laboratory of Environmental Change and Natural Disaster Ministry of Education Beijing Normal University ASU-SFI Center for Biosocial Complex Systems Arizona State University School of Life Sciences and School of Sustainability Arizona State University Stuttgart Research Center for Interdisciplinary Risk and Innovation Studies University of Stuttgart Global Climate Forum

The complexity of social-ecological systems(SES) is rooted in the outcomes of node activities connected by network topology. Thus far, in network dynamics research, the connectivity degree(CND), indicating how many nodes are connected to a given node, has been the dominant concept. However, connectivity focuses only on network topology, neglecting the crucial relation to node activities, and thereby leaving system outcomes largely unexplained. Inspired by the phenomenon of ‘‘consensus of wills and coordination of activities' ' often observed in disaster risk management, we propose a new concept of network characteristic, the consilience degree(CSD),aiming to measure the way in which network topology and node activities together contribute to system outcomes. The CSD captures the fact that nodes may assume different states that make their activities more or less *** two nodes with in/compatible states will lead to outcomes that are un/desirable from the perspective of the SES in question. We mathematically prove that the CSD is a generalized CND, and the CND is a special case of CSD. As a general, fundamental concept, the CSD can facilitate the development of a new framework of network properties, models, and theories that allows us to understand patterns of network behavior that cannot be explained in terms of connectivity alone. We further demonstrate that a co-evolutionary mechanism can naturally improve the CSD. Given the generality of co-evolution in SES, we argue that the CSD is an inherent attribute rather than an artificial concept, which underpins the fundamental importance of the CSD to the study of SES.

关键词： Complex networks Consilience degree Co-evolution Disaster risk reduction Social-ecological systems

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Spinal fixation after laminectomy in pigs prevents postoperative spinal cord injury

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Animal Models and Experimental Medicine 2022年第2期5卷 153-160页

作者： Emma M.H.Slot Bart de Boer Saskia Redegeld sander van Thoor Nizar Moayeri Willem-Bart Slooff Irene A.Schaafsma Björn Meij Tristan P.C.van Doormaal Department of Neurology and Neurosurgery University Medical Center UtrechtUtrechtThe Netherlands Department of Neurosurgery Elizabeth TweeSteden HospitalTilburgThe Netherlands Brain Technology Institute UtrechtThe Netherlands Department of Clinical Sciences Faculty of Veterinary MedicineUtrecht UniversityUtrechtThe Netherlands Department of Neurosurgery Clinical Neuroscience CenterUniversity Hospital ZurichZurichSwitzerland

Background:A safe,effective,and ethically sound animal model is essential for preclinical research to investigate spinal medical *** report the initial failure of a porcine spinal survival model and a potential solution by fixating the ***:Eleven female Dutch Landrace pigs underwent a spinal lumbar interlaminar decompression with durotomy and were randomized for implantation of a medical device or control *** resonance imaging(MRI)was performed before ***:Neurological deficits were observed in 6 out of the first 8 *** of these animals were terminated prematurely because they reached the predefined humane *** cord compression and myelopathy was observed on postoperative MRI *** hypothesized postoperative spinal instability with epidural hematoma,inherent to the biology of the model,and subsequent spinal cord injury as a potential *** the subsequent 3 animals,we fixated the spine with Lubra *** these animals recovered without neurological *** extent of spinal cord compression on MRI was variable across animals and did not seem to correspond well with neurological ***:This study shows that in a porcine in vivo model of interlaminar decompression and durotomy,fixation of the spine after lumbar interlaminar decompression is feasible and may improve neurological *** research is necessary to evaluate this hypothesis.

关键词： fixation i nterlaminar decompression medical device model spinal cord injury

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