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Creep-induced redistribution of alloying elements in CZ1 zirconium alloys

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journal of Materials Science & Technology 2024年第6期173卷 31-44页

作者： W.T.Lin Q.Y.Lv D.jiao L.B.Zhang j.Tan G.Sha j.Hu China Nuclear Power Technology Research Institute Shenzhen 518026China School of Material Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China

Introducing minor alloying elements is an effective strategy to improve the corrosion and mechanical properties of zirconium alloys for nuclear *** in-reactor service,external environment and stress can affect the distribution of alloying elements,substantially changing the degradation process of zirconium *** date,there is a lack of in-depth understanding of the interaction between creep and microchemistry ***,we conducted systematic transmission electron microscopy(TEM)and atom probe tomography(APT)investigations to address creep-induced redistribution of alloying elements in CZ1(Zr-Sn-Nb-Fe-Cr-Cu)zirconium alloy with different initial ***,Fe,Sn,and Cu are found to co-segregate at grain *** higher the intermediate annealing temperature,the larger the Gibbsian interfacial excesses of solute elements *** further demonstrate that creep can reduce the excess value of Fe at grain boundaries due to the coarsening of Zr-Fe-Cr second phase particles via grain boundary and dislocation pipe *** the same time,the excess value of Sn is increased by diffusing from the matrix to grain ***,Cu as a minor element in the concentration range of 0.05-0.3 wt.%is found to segregate at dislocations to form the Cottrell atmosphere and develop Cu-rich nanoclusters for suppressing dislocation *** new understanding of the segregation and clustering of minor alloying elements provides guidance for developing zirconium alloys with enhanced creep resistance.

关键词： Zirconium alloy Thermal creep Grain boundary segregation Dislocation segregation Cu-rich nanoclusters

Innovative pathways allow safe discharge of mild acute pancreatitis from the emergency room

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World journal of Gastroenterology 2024年第11期30卷 1475-1479页

作者： Darshan j Kothari Sunil G Sheth Division of Gastroenterology Duke University Medical CenterDurhamNC 27710United States Division of Gastroenterology&Hepatology Beth Israel Deaconess Medical CenterHarvard Medical SchoolBostonMA 02215United States

Acute pancreatitis(AP)is a leading cause of gastrointestinal-related hospitalizations in the United States,resulting in 300000 admissions per year with an estimated cost of over$2.6 billion *** severity of AP is determined by the presence of pancreatic complications and end-organ *** moderate/severe pancreatitis can be associated with significant morbidity and mortality,the majority of patients have a mild presentation with an uncomplicated course and mortality rate of less than 2%.Despite favorable outcomes,the majority of mild AP patients are admitted,contributing to healthcare cost and *** this Editorial we review the performance of an emergency department(ED)pathway for patients with mild AP at a tertiary care center with the goal of reducing hospitalizations,resource utilization,and costs after several years of implementation of the *** discuss the clinical course and outcomes of mild AP patients enrolled in the pathway who were successfully discharged from the ED compared to those who were admitted to the hospital,and identify predictors of successful ED discharge to select patients who can potentially be triaged to the *** conclude that by implementing innovative clinical pathways which are established and reproducible,selected AP patients can be safely discharged from the ED,reducing hospitalizations and healthcare costs,without compromising clinical *** also identify a subset of patients most likely to succeed in this pathway.

关键词： Emergency department Mild pancreatitis Pathways Hospitalization Predictors

Redefining hemorrhoid therapy with endoscopic polidocanol foam sclerobanding

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World journal of Gastroenterology 2024年第36期30卷 4021-4024页

作者： Asad Gul Rao Abdulqadir j Nashwan Department of Clinical Medicine Dow Medical CollegeKarachi 74200Pakistan Department of Nursing&Midwifery Research Hamad Medical CorporationDoha 3050Qatar

Hemorrhoids are a common and painful condition,with conventional treatments such as endoscopic rubber band ligation(ERBL)and injection sclerotherapy often falling short due to high recurrence rates and significant post-operative pain.A clinical trial by Qu et al introduces a novel approach called endoscopic polidocanol foam sclerobanding(EFSB).This multicenter randomized trial involved 195 patients with grade II and III internal hemorrhoids and demonstrated that EFSB significantly reduced recurrence rates and post-procedural pain while improving symptom relief and patient satisfaction compared to *** study's strengths include its robust design,comprehensive outcome evaluation,and patient-centered *** limitations such as the single-blind design and relatively short follow-up period,the findings suggest that EFSB could enhance clinical practice by offering a more effective and patient-friendly treatment *** research is needed to validate these results and explore the long-term benefits and cost-effectiveness of EFSB.

关键词： Hemorrhoids Endoscopic polidocanol foam sclerobanding Rubber band ligation Injection sclerotherapy Hemorrhoids recurrence Post-operative pain

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“暴风雪”出没注意!俄罗斯与核武器(上)

海陆空天惯性世界 2024年第2期 2-7页

作者：斯蒂芬·布兰克长弓(编译) 不详

译自美国陆军作战学院《俄罗斯核武器:过去、现在和未来》系列研究报告(斯蒂芬·布兰克/stephen ***主编)第七章。许多美国政府以及非政府分析人士都坚持认为,核武器在军事和政治层次的重要性正在不断降低。此类武器充其量只能用于对其... 详细信息

译自美国陆军作战学院《俄罗斯核武器:过去、现在和未来》系列研究报告(斯蒂芬·布兰克/stephen ***主编)第七章。许多美国政府以及非政府分析人士都坚持认为,核武器在军事和政治层次的重要性正在不断降低。此类武器充其量只能用于对其他核武器形成威慢作用,而常规武器正在迅速实现与核武器相近的作战能力,这使得有关方面对核武器的军事-政治用途日趋怀疑。

关键词：布兰克核武器俄罗斯美国政府政治层次暴风雪常规武器非政府

Construction of 2D/2D Ti_(3)C_(2)T_(x)MXene/CdS heterojunction with photothermal effect for efficient photocatalytic hydrogen production

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journal of Materials Science & Technology 2024年第4期171卷 1-9页

作者： T.Y.Huang Z.Yang S.Y.Yang Z.H.Dai Y.j.Liu j.H.Liao G.Y.Zhong Z.j.Xie Y.P.Fang S.S.Zhang Key Laboratory for Biobased Materials and Energy of Ministry of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China School of Chemical Engineering and Energy Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity of semiconductors to visible and infrared light is a key constraint on the utilization of light energy in photocatalytic *** photocatalysts with full-spectrum absorption through surface engineering is an effective approach to fully harnessing light energy in semiconductor ***,a novel stable Ti_(3)C_(2)T_(x)MXene/CdS heterojunction catalyst is obtained by in-situ epitaxial growth of two-dimensional(2D)CdS nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-alytic hydrogen evolution capability upon the heterogeneous *** unique 2D/2D structure effectively mitigated the recombination of photogenerated carriers,enhancing the photocatalytic performance of the ***,the composite catalyst exhibits a significantly higher surface temperature of 80.4℃under visible light irradiation at an intensity of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite catalyst with photothermal ef-fect demonstrates a remarkable hydrogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of CdS *** study introduces a novel approach for constructing full-spectrum absorption catalysts and expands the application of the photothermal effect in photocatalytic hydrogen evolution research.

关键词： Two-dimensional structure Heterostructure Photothermal effect Photocatalyst Hydrogen evolution

Consumer transparency in the production chain for plant varieties produced using new genomic techniques

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aBIOTECH 2024年第2期5卷 239-246页

作者： j.M.Lukasiewicz C.C.M.van de Wiel L.A.P.Lotz M.j.M.Smulders Wageningen University&Research P.O.Box 386NL-6700 AJ WageningenThe Netherlands

Plants edited with new genomic techniques(NGTs)currently fall under the Genetically Modified Organisms Directive(2001/18/EC)in the European *** the proposal of the European Commission,NGT plants are partially exempted from the regulations of this *** proposal makes a distinction between two categories of NGT plants:NGT-1 and ***-1 category plants are considered equal to plants obtained through conventional breeding *** plants will not be labelled for the consumer,although they will be labelled as ***-2 category plants may be labelled with additional information as a positive *** of seeds of varieties made with gene editing,but not the products,would mean that most steps in the production chain are transparent,but not the last step towards ***“right to know”and increasing knowledge of gene-edited food is a common theme in food labelling towards ***,we describe current labelling regimes and registers and how these may be applied to provide transparency on gene-edited products to ***,we also look into consumer studies,which indicate a greater acceptance of gene-edited food among consumers,especially when additional benefits such as sustainability are mentioned.

关键词： Labelling New genomic techniques Consumer transparency Plant products

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“暴风雪”出没注意! 俄罗斯与核武器下

海陆空天惯性世界 2024年第3期 2-17页

作者：斯蒂芬·布兰克长弓(编译) 不详

译自美国陆军作战学院《俄罗斯核武器:过去、现在和未来》系列研究报告(斯蒂芬·布兰克/stephen ***主编)第七章。

关键词：布兰克核武器俄罗斯暴风雪

Transabdominal intestinal ultrasound and its parameters used in the assessment of pediatric inflammatory bowel disease

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World journal of Clinical Pediatrics 2024年第3期13卷 137-140页

作者： Kevan j English Department of Medicine-Pediatrics St.George's University School of MedicineSaint George's 33334Saint GeorgeGrenada

This article extends on the use of transabdominal intestinal ultrasound in diagnosing pediatric inflammatory bowel *** of the more essential features used in assessing bowel inflammation,such as hyperemia and wall thickness on ultrasound,are expanded upon from the publication on imaging and endoscopic tools in pediatric inflammatory bowel disease.

关键词： Inflammatory bowel disease Intestinal ultrasound Limberg score Hyperemia Bowel wall thickness

Stability Analysis and Performance Evaluation of Additive Mixed-Precision Runge-Kutta Methods

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Communications on Applied Mathematics and Computation 2024年第1期6卷 705-738页

作者： Ben Burnett Sigal Gottlieb Zachary j.Grant Center for Scientific Computing and Data Science Research UMass DartmouthNorth DartmouthMassachusettsUSA CSME Michigan State UniversityEast LansingMichiganUSA

Additive Runge-Kutta methods designed for preserving highly accurate solutions in mixed-precision computation were previously proposed and *** specially designed methods use reduced precision for the implicit computations and full precision for the explicit *** this work,we analyze the stability properties of these methods and their sensitivity to the low-precision rounding errors,and demonstrate their performance in terms of accuracy and *** develop codes in FORTRAN and julia to solve nonlinear systems of ODEs and PDEs using the mixed-precision additive Runge-Kutta(MP-ARK)*** convergence,accuracy,and runtime of these methods are *** show that for a given level of accuracy,suitably chosen MP-ARK methods may provide significant reductions in runtime.

关键词： Mixed precision Runge-Kutta methods Additive methods Accuracy