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Reservoir quality of fluvial sandstone reservoirs in salt-walled mini- basins： an example from the Seagull field, Central Graben, North Sea, UK

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Petroleum Science 2018年第1期15卷 1-27页

作者： stephan Stricker Stuart J.Jones Neil Meadows Leon Bowen Department of Earth Sciences Durham University South Road Durham DH1 3LE UK RedRock Associates International Limited 38 Queens DrivePrenton Wirral CH43 0RP UK Department of Physics Durham University South RoadDurham DH1 3LE UK

The Triassic fluvial sandstones of the Skagerrak Formation were deposited in a series of salt-walled mini-basins and act as important hydrocarbon reservoirs for several high-pressure, high-temperature（HPHT） fields in the Central Graben, North Sea. The HPHT reservoirs exhibit excellent reservoir quality considering their depth of burial and hence have been of high interest for hydrocarbon exploration. This research uses a multidisciplinary approach to assess the Skagerrak Formation fluvial reservoir quality from the Seagull field incorporating core analysis, petrography, electron microscopy, XRD analysis, fluid inclusion appraisal and burial history modelling. Halokinesis and salt withdrawal at the margin of the saltwalled mini-basin induced early disaggregation bands and fractures at shallow burial and led to increased influx of meteoric water and clay mineral infiltration from overlying sedimentation. The density of disaggregation bands correlates with the occurrence and magnitude of pore-filling authigenic clay minerals, concentrated along the margin of the saltwalled mini-basin. The fluvial channel sandstones of the Skagerrak Formation are subject to strong intra-basinal spatial reservoir quality variations despite diagenesis and low vertical effective stress having played a favourable role in arresting porosity loss.

关键词： Reservoir quality Halokinesis - Diagenesis Clay minerals Porosity Disaggregation bands Salt-walled mini-basin

Ectomesenchymal chondromyxoid tumor: a comprehensive updated review of the literature and case report

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International Journal of Oral Science 2018年第1期10卷 7-13页

作者： Astrid Truschnegg stephan Acham Lumnije Kqiku Norbert Jakse Alfred Beham Department of Dental Medicine and Oral Health Division of Oral Surgery and OrthodonticsMedical University Graz Department of Dental Medicine and Oral Health Division of Preventive an Operative DentistryEndodonticsPeriodontologyProsthodonticsRestorative Dentistry and ImplantologyMedical University Graz IMAH Institute of Morphological Analytics and Human Genetics

Prompted by a unique case of an ectomesenchymal chondromyxoid tumor(ECT) of the palate in a 54-year-old female, we reviewed the English and German literature on this entity until the end of 2016 using Pub Med. The search produced 74 lingual cases with a nearly equal sex distribution and a mean age of 39.3 years, and two extra-lingual cases sharing histological and immunohistological features including nodular growth, round, fusiform or spindle-shaped cellular architecture, and chondromyxoid *** showed the majority of cases to be positive for glial fibrillary acidic protein(GFAP), S-100 protein,glycoprotein CD57, pancytokeratin (AE1/AE3), and smooth muscle actin(SMA); in isolated cases there was molecular-genetic rearrangement or gain of Ewing sarcoma breakpoint region 1 (EWSR1) but no rearrangement of pleomorphic adenoma gene 1 (PLAG1). At present, ectomesenchymal cells that migrate from the neural crest are considered to play a pivotal role in tumor *** cases had a benign course, although there were three recurrences. Because of the rarity of this tumor and the need for differential diagnostic differentiation from myoepithelioma and pleomorphic adenoma, both oral surgeons and pathologists should be aware of this entity.

关键词：中国牙科口腔医学

Scientific geodata infrastructures: challenges, approaches and directions

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International Journal of Digital Earth 2014年第7期7卷 613-633页

作者： Lars Bernard stephan Mas Matthias Muller Christin Henzen Johannes Brauner Department of Geosciences Faculty of Environmental SciencesTechnische Universitat DresdenDresdenGermany

Based on various experiences in developing Geodata Infrastructures(GDIs)for scientific applications,this article proposes the concept of a Scientific GDI that can be used by scientists in environmental and earth sciences to share and disseminate their research results and related analysis *** GDI is understood as an approach to tackle the science case in Digital Earth and to further enhance e-science for environmental *** Scientific GDI to support the research community in efficiently exchanging data and methods related to the various scientific disciplines forming the basis of environmental studies poses numerous challenges on today’s GDI *** paper summarizes requirements and recommendations on the publication of scientific geospatial data and on functionalities to be provided in Scientific *** practices and open issues for governance and policies of a Scientific GDI are discussed and are concluded by deriving a research agenda for the next decade.

关键词： scientific geodata infrastructure sharing environmental models geospatial cyberinfrastructure e-science spatial data infrastructure

Metamaterial-enhanced near-field readout platform for passive microsensor tags

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Microsystems & Nanoengineering 2022年第2期8卷 203-215页

作者： Ke Wu Guangwu Duan Xiaoguang Zhao Chunxu Chen stephan William Anderson Xin Zhang Department of Mechanical Engineering Boston UniversityBostonMA 02215USA Photonics Center Boston UniversityBostonMA 02215USA Department of Radiology Boston University Medical CampusBostonMA 02118USA

Radiofrequency identification(RFID),particularly passive RFID,is extensively employed in industrial applications to track and trace products,assets,and material *** ongoing trend toward increasingly miniaturized RFID sensor tags is likely to continue as technology advances,although miniaturization presents a challenge with regard to the communication coverage ***,efforts in applying metamaterials in RFID technology to increase power transfer efficiency through their unique capacity for electromagnetic wave manipulation have been *** particular,metamaterials are being increasingly applied in far-field RFID system ***,we report the development of a magnetic metamaterial and local field enhancement package enabling a marked boost in near-field magnetic strength,ultimately yielding a dramatic increase in the power transfer efficiency between reader and tag *** application of the proposed magnetic metamaterial and local field enhancement package to near-field RFID technology,by offering high power transfer efficiency and a larger communication coverage area,yields new opportunities in the rapidly emerging Internet of Things(loT)era.

关键词： passive offering yielding

The KUR(conservation and restoration) project A comparison of different methods to preserve waterlogged wood

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江汉考古 2014年第S1期 14-25页

作者： Waldemar Muskalla Markus Wittkopper stephan Brather Romisch Germanisches Zentralmuseum Mainz Brandenburgisches Landesamt für Denkmalpflege und Archaologisches Landesmuseum

本德国慕尼黑国家考古陈列馆、美因兹日尔曼博物馆、瑞士国家博物馆、美国德克萨斯农工大学考古与保护研究中心等文物保护机构参与了项目"The KUR(conservation and restoration)p roject"的研究,在2008-2011年期间对采用不同保护方法... 详细信息

本德国慕尼黑国家考古陈列馆、美因兹日尔曼博物馆、瑞士国家博物馆、美国德克萨斯农工大学考古与保护研究中心等文物保护机构参与了项目"The KUR(conservation and restoration)p roject"的研究,在2008-2011年期间对采用不同保护方法处理的800多件样品进行了解剖特征、木质素、纤维素的分析,以此来评估木材的降解程度;通过三维扫描测量径向、弦向、顺纹方向的收缩率来评价保护效果;并基于理论计算,对不同保护方法进行了成本评估。所有的研究数据和结果可登录***/kur查阅。

关键词：出土竹木漆器保护研究述略

Comparison of ultrashort pulse ablation of gold in air and water by time-resolved experiments

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Light(Science & Applications) 2022年第4期11卷 615-627页

作者： Maximilian Spellauge Carlos Donate-Buendia stephan Barcikowski Bilal Gokce Heinz P.Huber Department of Applied Sciences and Mechatronics Munich University of Applied SciencesLothstraBe 3480335 MunichGermany Technical Chemistry I and Center for Nanointegration Duisburg-Essen(CENIDE) University of Duisburg-Essen45141 EssenGermany Materials Science and Additive Manufacturing School of Mechanical Engineering and Safety EngineeringUniversity of Wuppertal42119 WuppertalGermany

Laser ablation in liquids is a highly interdisciplinary method at the intersection of physics and chemistry that offers the unique opportunity to generate surfaaant-free and stable nanoparticles from virtually any *** the last decades,numerous experimental and computational studies aimed to reveal the transient processes governing laser ablation in *** experimental studies investigated the involved processes on timescales ranging from nanoseconds to ***,the ablation dynamics occurring on a sub-nanosecond timescale are of fundamental importance,as the conditions under which nanoparticles are generated are established within this ***,experimental investigations of the early timescales are required to test computational *** visualize the complete spatiotemporal picosecond laser-induced ablation dynamics of gold immersed in air and water using ultrafast pump-probe *** reflectivity measurements reveal that the water confinement layer significantly influences the ablation dynamics on the entire investigated timescale from picoseconds to *** influence of the water confinement layer includes the electron injection and subsequent formation of a dense plasma on a picosecond timescale,the confinement of ablation products within hundreds of picoseconds,and the generation of a cavitation bubble on a nanosecond ***,we are able to locate the temporal appearance of secondary nanoparticles at about 600 ps after pulse *** results support computational predictions and provide valuable insight into the early-stage ablation dynamics governing laser ablation in liquids.

关键词： pulse ultrashort pump

Temporally Preserving Latent Variable Models:Offline and Online Training for Reconstruction and Interpretation of Fault Data for Gearbox Condition Monitoring

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Journal of Dynamics, Monitoring and Diagnostics 2024年第2期3卷 156-177页

作者： Ryan Balshaw P.stephan Heyns Daniel N.Wilke stephan Schmidt Center for Asset Integrity Management Department of Mechanical and Aeronautical EngineeringUniversity of PretoriaPretoriaSouth Africa

Latent variable models can effectively determine the condition of essential rotating machinery without needing labeled *** models analyze vibration data via an unsupervised learning *** preservation is necessary to obtain an informative latent manifold for the fault diagnosis *** a temporalpreserving context,two approaches exist to develop a condition-monitoring methodology:offline and *** latent variable models,the available training modes are not *** many traditional methods use offline training,online training can dynamically adjust the latent manifold,possibly leading to better fault signature extraction from the vibration *** study explores online training using temporal-preserving latent variable *** online training,there are two main methods:one focuses on reconstructing data and the other on interpreting the data *** are considered to evaluate how they diagnose faults over *** two experimental datasets,the study confirms that models from both training modes can detect changes in machinery health and identify faults even under varying ***,the complementarity of offline and online models is emphasized,reassuring their versatility in fault *** the implications of the training approach and the available model formulations is crucial for further research in latent variable modelbased fault diagnostics.

关键词： Condition monitoring unsupervised learning latent variable models temporal preservation training approaches

Can a polymorphism in the thalassemia gene and a heterozygote CFTR mutation cause acute pancreatitis?

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World Journal of Clinical Cases 2014年第3期2卷 62-66页

作者： J-Matthias L?hr stephan Haas Gastrocentrum Karolinska Institutet and University Hospital Division of Molecular Gastroenterology Department of Medicine Ⅱ Medical Faculty Mannheim University of Heidelberg

The case of a 32-year-old black woman of African descent who suffered from repeated episodes of acute pancreatitis, initially triggered when flying on airplanes, is reported. She did not drink alcohol or smoke. Genetic analysis was negative for cationic trypsinogen, serine protease inhibitor Kazal type 1 and chymotrypsin C. However, hemoglobin F was elevated. Sequencing of the thalassemia gene revealed a novel alteration in the 5' region indicative of a functional abnormality of the molecule. Sequencing the cystic fibrosis transmembrane conductance regulator(CFTR) gene revealed a heterozygote sequence variant. The combination of a hemoglobin gene mutation known for thalassemia in conjunction with the hitherto undescribed CFTR mutation is suggested to pave the road for initial and repetitive pancreatitis attacks. This will be discussed.

关键词： Acute pancreatitis Hypoxia Flying Thalassemia Hemoglobin Cystic fibrosis transmembrane conductance regulator Hereditary persistence of fetal hemoglobin

Long-Lasting Stretching Induces Muscle Hypertrophy:A Meta-Analysis of Animal Studies

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Journal of Science in Sport and Exercise 2023年第4期5卷 289-301页

作者： Konstantin Warneke Philipp Alexander Freund stephan Schiemann Institute for Exercise Sport and HealthLeuphana UniversityUniversitätsallee 1LüneburgGermany Institute of Psychology Leuphana UniversityLüneburgGermany

Muscular hypertrophy depends on metabolic exhaustion as well as mechanical load on the *** tension seems to be the crucial factor to stimulate protein *** present meta-analysis was conducted to determine whether stretching can generate adequate mechanical tension to induce muscle *** used PubMed,Web of Science,and Scopus to search for literature examining the effects of long-term stretching on muscle mass,muscle cross-sectional area,fiber cross-sectional area,and fiber *** there was no sufficient number of studies investigating long-lasting stretching in humans,we only included original animal studies in the current ***,we identified 16 studies meeting the inclusion criteria(*** of at least 15 min per day).The 16 studies yielded 39 data points for muscle mass,11 data points for muscle cross-sectional area,20 data points for fiber cross-sectional area,and 10 data points for fiber *** all designs and categories,statistically significant increases were found for muscle mass(d=8.51;95%CI 7.11-9.91),muscle cross-sectional area(d=7.91;95%CI 5.75-10.08),fiber cross-sectional area(d=5.81;95%CI 4.32-7.31),and fiber number(d=4.62;95%CI 2.54-6.71).The findings show an(almost)continuous positive effect of long-term stretching on the listed parameters,so that it can be assumed that stretch training with adequate intensity and duration leads to hypertrophy and hyperplasia,at least in animal studies.A general transferability to humans-certainly with limited effectiveness-can be hypothesized but requires further research and training studies.

关键词： Muscle mass Static stretching Hyperplasia Chronic stretching