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Analysis of B_(c)→τν_(τ) at CEPC

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Chinese Physics C 2021年第2期45卷 39-47页

作者： Taifan Zheng Ji Xu Lu Cao Dan Yu Wei Wang soeren Prell Yeuk-Kwan ECheung Manqi Ruan School of Physics Nanjing UniversityNanjing 210023China INPAC SKLPPCMOE KLPPCSchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Physikalisches Institut der Rheinischen Friedrich-Wilhelms-Universität Bonn 53115 BonnGermany Institute of High Energy Physics Beijing 100049China Department of Physics and Astronomy Iowa State UniversityAmesIAUSA

Precise determination of the B_(c)→τν_(τ) branching ratio provides an advantageous opportunity for under-standing the electroweak structure of the Standard Model,measuring the CKM matrix element |V_(cb)|,and probing new physics *** this paper,we discuss the potential of measuring the process B_(c)→ τν_(τ)withτdecaying leptonically at the proposed Circular Electron Positron Collider(CEPC).We conclude that during the Z pole opera-tion,the channel signal can achieve five-σsignificance with~10^9 Z decays,and the signal strength accuracies for B_(c)→τν_(τ) can reach around 1%level at the nominal CEPC Z pole statistics of one tillion Z decays,assuming the total B_(c)→τν_(τ) yield is 3.6x 10^(6).Our theoretical analysis indicates the accuracy could provide a strong constraint on the general effective Hamiltonian for the b→cτν *** the total Be yield can be determined to 0(1%)level of accuracy in the future,these results also imply|V_(cb)| could be measured up to 0(1%)level of accuracy.

关键词： CEPC Flavor B_(c)meson

Lightweight in Automotive Components by Forming Technology

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Automotive Innovation 2020年第3期3卷 195-209页

作者： Stephan Rosenthal Fabian Maaß Mike Kamaliev Marlon Hahn soeren Gies A.Erman Tekkaya Institute of Forming Technology and Lightweight Components(IUL) TU Dortmund University44227 DortmundGermany

Lightweight design is one of the current key drivers to reduce the energy consumption of *** methodologies for lightweight components,strategies utilizing materials with favorable specific properties and hybrid materials are used to increase the performance of parts for automotive *** this paper,various forming processes to produce light parts are *** lightweight design is discussed,covering the manufacturing processes to produce hybrid components like fiber-metal,polymer-metal and metal-metal composites,which can be used in subsequent deep drawing or combined forming *** to increasing the specific strength and stiffness with thermomechanical forming processes as well as the in situ control of the microstructure of such components are *** lightweight design discusses possibilities to plastically form high-strength or high-performance materials like magnesium or titanium in sheet,profile and tube forming *** join those materials and/or dissimilar materials,new joining by forming technologies are *** economically produce lightweight parts with gears or functional elements,incremental sheet-bulk metal forming is *** an important part property,the damage evolution during the forming operations will be discussed to enable even lighter parts through a more reliable *** methods for predicting and tailoring the mechanical properties like strength and residual stresses will be *** possibilities of system lightweight design with forming technologies are presented.A combination of additive manufacturing and forming to produce highly complex parts with integrated functions will be *** integration of functions by a hot extrusion process for the manufacturing of shape memory alloys is *** in-depth understanding of the newly developed processes,methodologies and effects allows for a more accurate dimen-sioning of *** facilitates a reduction in th

关键词： Forming technology Lightweight design Energy efficiency Manufacturing processes

Status of the chiral magnetic effect and collisions of isobars

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Chinese Physics C 2017年第7期41卷 1-13页

作者： Volker Koch soeren Schlichting Vladimir Skokov Paul Sorensen Jim Thomas Sergei Voloshin Gang Wang Ho-Ung Yee Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA Department of Physics University of Washington Seattle WA 98195-1560 USA RIKEN/BNL Brookhaven National Laboratory Upton NY 11973 USA Wayne State University 666 W. Hancock Detroit MI 48201 USA Department of Physics and Astronomy University of California Los Angeles California 90095 USA Department of Physics University of Illinois Chicago Illinois 60607 USA

In this review, we examine the current theoretical and experimental status of the chiral magnetic *** discuss possible future strategies for resolving uncertainties in interpretation including recommendations for theoretical work, recommendations for measurements based on data collected in the past five years, and recommendations for beam use in the coming years of RHIC. We specifically investigate the case for colliding nuclear isobars（nuclei with the same mass but different charge） and find the case compelling. We recommend that a program of nuclear isobar collisions to isolate the chiral magnetic effect from background sources be placed as a high priority item in the strategy for completing the RHIC mission.

关键词： chiral magnetic effect heavy ion collisions QCD

A qualitative study of nurse practitioner promotion of interprofessional care across institutional settings:Perspectives from different healthcare professionals

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International Journal of Nursing Sciences 2016年第1期3卷 3-10页

作者： Christina Hurlock-Chorostecki Mary van soeren Kathleen MacMillan Souraya Sidani Faith Donald Scott Reeves Western University LondonOntarioCanada Dalhousie University HalifaxNova ScotiaCanada Ryerson University TorontoOntarioCanada Kingston University University of LondonUK St George's University of LondonUK

Objective:Interprofessional care,an aim of institutional healthcare settings globally,promotes safe,cost-effective,quality *** professionals act to enable interprofessional care has not been *** nurse practitioner role,with its expertise in both medicine and nursing,is known to enhance collaboration and promote interprofessional care *** objective of this study was to identify,from the healthcare professionals'perspective,nurse practitioner strategies used to enhance interprofessional ***:A hermeneutic phenomenology design was *** professionals from acute care hospitals and associated long-term care residences(n=6)in one Canadian province were invited to *** interviews were held with healthcare professionals(n=52)who regularly work with a nurse *** participants were asked to share experiences that held significance or value in promoting interprofessional ***:Four valued role attributes were identified;consistent role presence,time to focus on the patient,effective communication,and respectful *** strategies extending from the attributes included knowledge sharing,respectful negotiation,identifying patient issues,being open and transparent,listening to opinions,bridging professions,and working as the hub of the *** types of interprofessional relationships were perceived,with the hierarchical type as the most ***:Nurse practitioners in acute care hospital and long-term care settings have valued attributes that can promote interprofessional *** strategies to promote interprofessional care emerge from these role ***,the interprofessional relationship type perceived could enhance or impede the contribution of the strategies to interprofessional care promotion.

关键词： Hospital Interprofessional care Nurse practitioner Phenomenology Interprofessional collaboration

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世博会阿联酋馆结构设计与研究

建筑结构学报 2010年第5期31卷 142-147页

作者：黄永强包联进姜文伟 STEPHAN soeren 徐晓焰童骏瞿璐华东建筑设计研究院有限公司上海200002 诺蓝建筑工程顾问(北京)有限公司北京100026

世博会阿联酋国家馆外形为两座沙丘,体型较为特殊。阿联酋馆为临时性建筑,世博会后将拆除并移至异地重新安装继续使用,故杆件间的连接均可拆卸。结构体系主要为单层网壳,节点采用了国内较少应用的螺栓连接节点。文中着重介绍了网壳螺栓... 详细信息

世博会阿联酋国家馆外形为两座沙丘,体型较为特殊。阿联酋馆为临时性建筑,世博会后将拆除并移至异地重新安装继续使用,故杆件间的连接均可拆卸。结构体系主要为单层网壳,节点采用了国内较少应用的螺栓连接节点。文中着重介绍了网壳螺栓连接节点的设计。结合节点试验研究与数值计算,确定螺栓连接节点刚度,并对节点抗弯刚度对结构整体稳定的影响进行了分析。研究结果表明:螺栓连接节点在网壳平面外为半刚性连接,试验得到的节点受弯承载力较数值分析结果偏大;节点抗弯刚度对网壳结构的周期和竖向变形影响较小,对结构整体稳定性影响较大。

关键词：单层网壳半刚性节点数值风洞模拟节点承载力整体稳定

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大亚湾中微子探测器能量响应非线性的研究

核电子学与探测技术 2014年第6期34卷 679-683页

作者：阳马生于泽源 soeren Jetter 中国科学院高能物理研究所北京100049 中国科学院大学北京100049

大亚湾反应堆中微子实验利用大型液体闪烁体探测器探测来自反应堆的中微子。液体闪烁体探测器的能量响应非线性研究是准确重建能量的关键。论文详细论述了能量非线性的来源及测量方法,包括在探测器中利用不同能量的γ源进行刻度,利用本... 详细信息

大亚湾反应堆中微子实验利用大型液体闪烁体探测器探测来自反应堆的中微子。液体闪烁体探测器的能量响应非线性研究是准确重建能量的关键。论文详细论述了能量非线性的来源及测量方法,包括在探测器中利用不同能量的γ源进行刻度,利用本底事例进行刻度,以及在实验室开展的针对不同非线性来源的独立测量,最后通过联合拟合的方法给出测量结果并加以讨论。

关键词：中微子振荡大亚湾中微子实验能量响应非线性

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结块泥土效果

模型世界 2019年第4期 78-79页

作者： RON soeren

车辆的底盘和前后时常会被尘土和泥泞所覆盖。一个模型的这些部位,特别是底盘两侧一般都会完全或部分被路轮和履带所遮挡。然而,这是一个值得重点关照的部位。下面就向大家介绍如何用简易的方法来做出逼真的效果。

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Analysis of Patients with LifeVest after Cardiac Surgery

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World Journal of Cardiovascular Surgery 2020年第5期10卷 59-65页

作者： Vusal Hajiyev Temirlan Erkenov Andreas Smechowski soeren Just Oliver Grimmig Dirk Fritzsche Sana-Herzzentrum Cottbus Cottbus Germany

Background: Patients with left ventricular ejection fraction (LVEF) ≤ 35% are at a high risk of sudden cardiac death (SCD) and benefit from implantable cardioverter-defibrillator (ICD) therapy. ICD implantation is not indicated during the first 40 days after acute myocardial infarction and <3 months after coronary artery bypass grafting, because of possible cardiac function recovery. The wearable cardioverter defibrillator (WCD) is a therapy option for preventing sudden cardiac death at the time of recovery. This study evaluated the effectiveness of the wearable cardioverter-defibrillator in preventing SCD after cardiac surgery. Methods: This is a retrospective study conducted in the Heart Center in Cottbus. From 02.2015 through 02.2018 26 WCD patients were retrospectively analyzed and followed-up. Patient demographics, defibrillation treatments, and daily wear times were retrospectively obtained from our clinical database and LifeVest network. The patients were questioned about actual NYHA grade and implanted ICD at the end of follow-up. Results: Twenty-five patients (mean age 65, 22 men, 3 women) were treated with a WCD in response to heart failure (mean EF = 24%) after cardiac surgery (21 CABG, 1 AVR, 1 AVR + CABG, 1 AVR + MVR, MVR + CABG). Average daily use of a WCD was 22.1 (SD ± 2.7) hours which were worn for 85 days (SD ± 35). At that time 11.96 (SD ± 15) events were detected but not treated, 1 defibrillation performed and no asystole seen. At the end of follow-up (12 months, SD ± 9) 20 patients were questioned. All of the patients were alive and 5 (25%) of them were with implanted ICD. 10 (50%) patients were in NYHA grade I, 3 (12%) in NYHA grade II, 3 (12%) between grade II-III, 2 (8%) in grade III and 2 (8%) patients in NYHA grade IV. Conclusions: A WCD is an effective therapy for prevention of sudden cardiac death during the recovery period of heart function after cardiac surgery. This is treatment with high patient compliance.

关键词： Wearable Cardioverter-Defibrillator LifeVest Cardiac Insufficiency Cardiac Surgery

Measurement of Collision Conditions in Magnetic Pulse Welding Processes

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Journal of Physical Science and Application 2017年第4期7卷 1-10页

作者： Joerg Bellmann Eckhard Beyer Joem Lueg-Althoff soeren Gies A. Erman Tekkaya Sebastian Schulze Institute of Manufacturing Science and Engineering Technical University Dresden Dresden 01062 Germany Institute of Forming Technology and Lightweight Components TU Dortmund University Dortmund 4422 7 Germany Fraunhofer IWS Dresden Dresden 012 77 Germany

MPW （magnetic pulse welding） is a solid state joining technology that allows for the generation of strong metallic bonds, even between dissimilar metals. Due to the absence of external heat, critical intermetallic phases can largely be avoided. In this process, Lorentz forces are utilized for the rapid acceleration of at least one of the two metallic joining partners leading to the controlled high velocity impact between them. The measurement of the collision conditions and their targeted manipulation are the key factors of a successful process development. Optical measuring techniques are preferred, since they are not influenced by the prevalent strong magnetic field in the vicinity of the working coil. In this paper, the characteristic high velocity impact flash during MPW was monitored and evaluated using phototransistors in order to measure the time of the impact. The results are in good accordance with the established PDV （photon Doppler velocimetry） and show a good repeatability. Furthermore, the collision front velocity was investigated using adapted part geometries within a series of tests. This velocity component is one of the key parameters in MPW; its value decreases along the weld zone. With the help of this newly introduced measurement tool, the magnetic pressure distribution or the joining geometry can be adjusted more effectively.

关键词： Magnetic pulse welding impact welding process monitoring collision conditions dissimilar metal joining.