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Influence of Stress Ratio and Loading Condition on Near-threshold Fatigue Crack Growth behaviour

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Journal of Materials Science & Technology 1993年第1期9卷 47-52页

作者： b.weiss R.Stickler University of Vienna Wahringer Street 42A-1090 ViennaAustria

Near-threshold fatigue crack propagation behaviour of a cold-worked copper tested with distinct fa- tigue testing systems under different stress ratios has been *** emphasis was placed on the evaluation of crack closure effect as well as the effective fatigue threshold,It was found that the fatigue threshold for R=0 is higher than those for R=-1 and R=0.4,for which almost the same threshold value was *** with the conventional closure evaluation method,the pro- posed new closure evaluation method can generally interpret the dependence of the fatigue thresh- old on stress ratio and loading condition,and leads to a higher and relatively constant effective fa- tigue threshold of about 3 MPa·m^(1/2) for the cold-worked copper at different stress ratios and loading conditions.

关键词： near-threshold fatigue crack stress ratio

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Pathological and Physiological High-frequency Oscillations on Electroencephalography in Patients with Epilepsy

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Neuroscience bulletin 2024年第5期40卷 609-620页

作者： Hongyi Ye Cong Chen Shennan A.weiss Shuang Wang Department of Neurology Epilepsy CenterSecond Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou310009China Department of Neurology State University of New York DownstateBrooklynNY11203USA Department of Physiology and Pharmacology State University of New York DownstateBrooklynNY11203USA Department of Neurology New York City Health+Hospitals/Kings CountyBrooklynNY11203USA

High-frequency oscillations(HFOs)encompass ripples(80 Hz–200 Hz)and fast ripples(200 Hz–600 Hz),serving as a promising biomarker for localizing the epileptogenic zone in *** fast ripples are always pathological,while ripples may be physiological or *** physiological from pathological ripples is important not only for designating epileptogenic brain regions,but also for investigations that study ripples in the context of memory encoding,consolidation,and recall in patients with *** studies have sought to identify distinguishing features between pathological and physiological ripples over the past two *** and pathological ripples differ with respect to their spatial location,cellular mechanisms,morphology,and coupling with background electroencephalographic *** studies have demonstrated that differentiating between pathological and physiological ripples can improve surgical outcome *** this review,we summarize the characteristics,differences,and applications of pathological and physiological HFOs and discuss strategies for their clinical translation.

关键词： Ripples Epilepsy Memory Sleep Surgical outcome

Motor-vehicle crashes during pregnancy: a retrospective cohort study

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Open Journal of Obstetrics and Gynecology 2011年第4期1卷 202-207页

作者： Harold b. weiss Erin K. Sauber-Schatz Amy H. Herring 不详

background: The purpose of this study was to assess the risk of motor-vehicle pregnant driver crashes in Pennsylvania using vital statistics linked to police and ambulance reports. This was supplemented with a review of national age and sex specific crash and fertility data to put this risk into perspective and rank the likelihood for pregnancy-related crashes in other states. Methods: Motor vehicle police crash reports from the Pennsylvania Department of Transportation were probabilistically linked to four years of birth and fetal death data and five years of infant death records and ambulance reports. State specific motor-vehicle traffic injury rates (fatal and non-fatal) were compared to birth rates, by age, for women ages 15 - 34. Results: 5929 (1.1%) of the women with a birth or fetal death linked to a police reported motor vehicle driver crash during pregnancy. One-third (32.5%) of these crashes resulted in minor maternal injuries and 7.5% resulted in moderate to fatal maternal injuries. Crashes were evenly distributed across gestational ages. Young drivers (20 - 24) were at highest risk. Police reported non-belt use was 10%. Conclusions: This study quantifies the risk of motor vehicle crashes during pregnancy in Pennsylvania and offers a perspective on potential variations in other states. Pregnancy related crashes occur at a higher rate than infant related crashes with a concomitant threat to the fetus and new-born not usually tracked within current crash data systems.

关键词： Maternal Injury Motor Vehicle Crash

Diet and monensin influence the temporal dynamics of the rumen microbiome in stocker and finishing cattle

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Journal of Animal Science and biotechnology 2024年第2期15卷 733-748页

作者： Jianmin Chai Caleb P.weiss Paul A.beck Wei Zhao Ying Li Jiangchao Zhao Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise breeding College of Life Science and EngineeringFoshan UniversityFoshanChina Division of Agriculture Department of Animal ScienceUniversity of ArkansasFayettevilleARUSA Department of Animal and Food Sciences Oklahoma State UniversityStillwaterOKUSA Institute of Feed Research of Chinese Academy of Agricultural Sciences Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural AffairsBeijing 100193China

background Stocker cattle diet and management influence beef cattle performance during the finishing stage,but knowledge of the dynamics of the rumen microbiome associated with the host are lacking.A longitudinal study was conducted to determine how the feeding strategy from the stocker to the finishing stages of production affects the temporal dynamics of rumen *** the stocker phase,either dry hay or wheat pasture were provided,and three levels of monensin were *** calves were then transported to a feedlot and received similar finishing diets with or without *** microbial samples were collected on d 0,28,85 during the stocker stage(S0,S28 and S85)and d 0,14,28,56,30 d before slaughter and the end of the trial during the finishing stage(F0,F14,F28,F56,Pre-ba,and Final).The V4 region of the bacterial 16S rRNA gene of 263 rumen samples was *** Higher alpha diversity,including the number of observed bacterial features and the Shannon index,was observed in the stocker phase compared to the finishing *** bacterial amplicon sequence variants(ASVs)differentiating different sampling time points were *** treatments during the stocker stage temporally impact the dynamics of rumen *** example,shared bacteria,including bacteroidales(ASV19)and Streptococcus infantarius(ASV94),were significantly higher in hay rumen on S28,S85,and F0,while bacteroidaceae(ASV11)and Limivicinus(ASV15)were more abundant in *** affected rumen microbial composition at a specific *** to feedlot significantly influenced microbiome structure and diversity in hay-fed *** taxa associated with body weight were classified,and core microbiotas interacted with each other during the *** In summary,the temporal dynamics of the rumen microbiome in cattle at the stocker and finishing stage are influenced by multiple factors of the feeding *** at the stocker phase may t

关键词： beef cattle Diet Feedlot phase Monensin Next-generation sequencing Rumen microbiota Stocker

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Nina 66 beiluogu Xiang,Dongcheng district,beijing

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城市漫步（GbA版） 2024年第6期 12-13页

作者： Rachel weiss 不详

Nestled amidst the labyrinthine alleys of beijing's historic beiluoguxiang hutong lies Nina,a gem of a bar exuding a unique charm that draws in locals and wanderers *** its heart is Italian native Umberto,a bartender ... 详细信息

关键词： district Italian interview

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和平时期医院救治大量灾害伤员时的组织工作

国外医学(医院管理分册) 1985年第4期 23-26页

作者： D. b weiss 毛玉明

本文介绍一个民间医院在接受和治疗大量灾害伤员时的组织工作。

关键词：大量伤员医院组织工作灾害

breaking the scattering limits of water waves

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National Science Review 2024年第06期 85-86页

作者： Adrià Canós Valero Thomas weiss Yuri Kivshar Institute of Physics University of Graz 4th Physics Institute University of Stuttgart Research School of Physics Australian National University

When water, light or sound waves impinge on objects smaller than the wavelength, a scattering process takes place[1]. The scattering of waves plays an essential role in a myriad of natural phenomena. In ocean engineering, enhancing the scattering of water waves allows capturing energy from larger areas, with clear implications for energy harvesting and coastal protection.

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Migas Mercado 1 Jianguomenwai Street,Chaoyangdistrict 7th Floor North Zone China World Mall,beijing

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城市漫步（GbA版） 2024年第6期 14-15页

作者： Rachel weiss 不详

Migas Mercado in beijing's CbDarea stands as a prominentfigure in the city's cocktailscene, seamlessly blending stunningvistas with meticulously crafted *** on the 7th floor of theChina World Mall, Migas Mercadooffers... 详细信息

关键词： owned district Mall

Yanqing Longqingxia Gorge The"Little Guilin"of beijing

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城市漫步（GbA版） 2024年第8期 6-9页

作者： Rachel weiss 不详

Hiking,boating,bungeejumping-does that sound like your kind of fun?If so,Longqingxia Gorge is the perfect day trip from *** 85 kilometers northwest of the city,this stunning destination boasts crystal-clearwaters,lush... 详细信息

关键词： northwest perfect destination