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心肺运动试验在男性与女性心力衰竭患者中预测价值的比较

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世界核心医学期刊文摘(心脏病学分册) 2007年第5期 40-41页

作者： Guazzi M. Arena R. myers j. 郭俊 Department of Physical Therapy Virginia Commonwealth University Box 980224 Richmond VA 23298- 0224 United States

背景:心肺运动试验(CPX)对心力衰竭(HF)人群确实具有预测价值。旨在探讨CPX在HF个体中预测价值的研究一直以来主要以男性人群作为试验对象。本研究旨在检查CPX在女性HF人群中的预测价值。方法:研究纳入已诊断为HF的75例女性和337例男性受试

关键词：预测价值心肺运动试验心力衰竭男性患者女性

心力衰竭患者运动试验中呼气末二氧化碳分压的预后价值

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世界核心医学期刊文摘（心脏病学分册） 2007年第8期3卷 51-52页

作者： Arena R. Guazzi M. myers j. 马超 Department of Physical Therapy Virginia Commonwealth University Box 980224 Health Sciences Campus Richmond VA 23298- 0224 United States

背景:现已证实,通气阈值(VT)时的呼气末二氧化碳分压(PETCO2)与心力衰竭(H F)患者运动期间的心输出量具强相关,但关于其预后预测价值的资料很少。目的:该研究旨在评估PETCO2预测H F受试者心脏相关事件的效力。方法:130例代偿性H F受试... 详细信息

背景:现已证实,通气阈值(VT)时的呼气末二氧化碳分压(PETCO2)与心力衰竭(H F)患者运动期间的心输出量具强相关,但关于其预后预测价值的资料很少。目的:该研究旨在评估PETCO2预测H F受试者心脏相关事件的效力。方法:130例代偿性H F受试者接受心肺运动试验(CPX)。确定受试者的峰值耗氧量(VO2)、每分通气量/二氧化碳产生量(VE/VCO2)斜率以及PETCO2。

关键词：运动试验预后价值每分通气量心输出量通气阈预后预测耗氧量强相关临床评估特异度

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Analysis of ancient mass extinction recoveries in marine environments: generating strategies for managing outcomes of the current mass extinction

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National Science Review 2024年第1期11卷 8-10页

作者： David j.Bottj.r Department of Earth Sciences University of Southern California

The defining feature of a mass extinction and its associated recovery is the global amount of extinction that occurred[1]. However, there is finer-scale detail to the story, as seen in the ongoing modern mass extinction(the sixth mass extinction), which exhibits variable effects among marine ecosystems and environments, and hence geographic areas [1].

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心力衰竭患者静息状态呼气末二氧化碳分压的预后价值

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世界核心医学期刊文摘（心脏病学分册） 2006年第7期2卷 45-45页

作者： Arena R. Peberdy M.A. myers j. 王亭忠 Department of Physical Therapy Virginia Commonwealth University Box 980224 Health Sciences Campus Richmond VA 23298-0224United States

Background: Cardiopulmonary exercise testing(CPET) variables provide valuable prognostic information in the heart failure(HF) population. The purpose of the present study is to assess the ability of resting end-tidal carbon dioxide partial pressure(PETCO2) to predict cardiac-related events in patients with HF. Methods: 121 subj.cts diagnosed with compensated HF underwent CPET on an outpatient basis. Mean age and ej.ction fraction were 49.3 years(±14.7) and 28.4%(±13.4), respectively. Resting PETCO2 was determined immediately prior to the exercise test in the seated position. Peak oxygen consumption(VO2) and the minute ventilation-carbon dioxide production(VE/VCO2) slope were also acquired during CPET. Results: There were 41 cardiac-related hospitalizations and 9 cardiac-related deaths in the year following CPET. Mean resting PETCO2, peak VO2 and VE/VCO2 slope were 34.1 mmHg(±4.6), 14.5 ml·kg-1·min-1(±5.1) and 35.9(±8.7) respectively. Univariate Cox regression analysis revealed that resting PETCO2(Chi-square=28.4, pj.ctive measure to obtain during both non-exercise and exercise evaluations in patients with HF.

关键词：预后价值射血分数心脏事件运动试验通气当量预后指标预后信息住院治疗耗氧量过程中测量

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心率恢复在心力衰竭患者中的预后预测价值

世界核心医学期刊文摘（心脏病学分册） 2006年第9期2卷 16-16页

作者： Arena R. Guazzi M. myers j. Peberdy M.A. 杨海涛 Department of Physical Therapy Virginia Commonwealth UniversityHealth SciencesCampusRichmondVA23298-0224United States.Dr

Background: The rate in which heart rate recovers from exercise has recently been shown to be a strong predictor of mortality in patients suspected of having coronary disease, but its prognostic value in patients with heart failure(HF) has not been explored. We sought to assess the prognostic utility of heart rate recovery(HRR) in patients with HF. Methods: Eighty-seven subj.cts diagnosed with compensated HF underwent cardiopulmonary exercise testing(CPX). Mean age and ej.ction fraction were 50.0(±13.9) years and 28.1%(±13.6%), respectively. Heart rate at 1-minute post-CPX was subtracted from maximal heart rate during the exercise test to produce a measure of HRR1 in beats per minute. Subj.cts were followed for a combined death/hospitalization end point for 1-year after CPX. Results: The mean peak respiratory exchange ratio, peak oxygen consumption(Vo2), minute ventilation/carbon dioxide production(VE/Vco2) slope, and HRR1 were 1.06(±0.11), 14.8(±4.7)mL·kg-1·min-1, 36.6(±8.6), and 11.0(±10.4) beat/min, respectively. Although all three variables were significant univariate predictors of the composite end point(P

关键词：运动后心率恢复心力衰竭患者预测价值预后心肺运动试验 Cox回归分析平均年龄每分钟通气量

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Enhanced dual plasmonic photocatalysis through plasmonic coupling in eccentric noble metal-nonstoichiometric copper chakogenide hetero-nanostructures

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Nano Research 2022年第2期15卷 1579-1586页

作者： Mariia Ivanchenko Vida Nooshnab Alline F.myers Nicolas Large Andrew j.Evangelista Hao j.ng Department of Chemistry and Biochemistry George Mason UniversityFairfaxVirginia 22030USA Department of Physics and Astronomy The University of Texas at San AntonioSan AntonioTX 78249USA National Institute of Standards and Technology(NIST) 100 Bureau Dr.GaithersburgMaryland 20899USA

The extension of plasmonics to materials beyond the conventional noble metals opens up a novel and exciting regime after the inspiring discovery of characteristic localized surface plasmon resonances(LSPRs)in doped semiconductor nanocrystals originating from the collective oscillations of free holes in the valence *** herein prepare colloidal monodisperse eccentric dual plasmonic noble metal-nonstoichiometric copper chalcogenide(Au@Cu_(2-x)Se)hybrid hetero-nanostructures with precisely controlled semiconductor shell size and two tunable LSPRs in both visible(VIS)and near-infrared(NIR)regions associated with Au and Cu_(2-x)Se,*** systematic evaluations of the photocatalytic performance of Au@Cu_(2-x)Se upon sole NIR and dual VIS+NIR simultaneous excitations,we are capable of unambiguously elucidating the role of plasmonic coupling between two dissimilar building blocks on the accelerated photocatalytic reactions with greater rate constants from both experimental and computational *** significantly enhanced strength of the electromagnetic field arising from efficient plasmonic coupling under the excitation of two LSPRs results in the superior activities of dual plasmonic Au@Cu_(2-x)Se in *** new physical and chemical insights gained from this work provide the keystone for the rational design and construction of high-quality dual-or even multi-plasmonic nano-systems with optimized properties for widespread applications ranging from photocatalysis to molecular spectroscopies.

关键词： dual plasmonic nonstoichiometric copper chalcogenides time-domain(FDTD) photocatalysis

Association between admission haematocrit and mortality among men with acute ischaemic stroke

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Stroke & Vascular Neurology 2018年第3期3卷 160-168页

作者： j.son j.Sico Laura j.myers Brenda j.Fenton j.hn Concato Linda S Williams Dawn M Bravata Neurology Service VA Connecticut Healthcare SystemWest HavenConnecticutUSA Department of Neurology Center for NeuroEpidemiological and Clinical Neurological ResearchYale University School of MedicineNew HavenConnecticutUSA Department of Internal Medicine Yale University School of MedicineNew HavenConnecticutUSA Clinical Epidemiology Research Center(CERC) VA Connecticut Healthcare SystemWest HavenConnecticutUSA Pain Research InformaticsMultimorbidities and Education(PRIME)Center of InnovationVA Connecticut Healthcare SystemWest HavenConnecticutUSA Communication and the HSR&D Stroke Quality Enhancement Research Initiative(QUERI) Richard L Roudebush VA Medical CenterIndianapolisIndianaUSA VA Health Services Research and Development(HSR&D) Center for Healthcare InformaticsRichard L Roudebush VA Medical CenterIndianapolisIndianaUSA Division of Chronic Disease Epidemiology Yale School of Public HealthWest HavenConnecticutUSA Medical Service VA Connecticut Healthcare SystemWest HavenConnecticutUSA Regenstrief Institute IndianapolisIndianaUSA Department of Neurology Indiana University School of MedicineIndianapolisIndianaUSA Department of Internal Medicine Indiana University School of MedicineIndianapolisIndianaUSA

Obj.ctive Anaemia is associated with higher mortality among patients with non-stroke cardiovascular conditions;less is known regarding the relationship between anaemia and mortality among patients with acute ischaemic *** Medical records were abstracted for n=3965 veterans from 131 Veterans Health Administration facilities who were admitted with ischaemic stroke in fiscal year *** values within 24 hours of admission were classified as≤27%,28%-32%,33%-37%,38%-42%,43%-47% or≥48%.Multivariate logistic regression was used to examine the relationship between anaemia and in-hospital,30-day,6-month and 1-year mortality,adj.sting for age,medical comorbidities,modified Acute Physiology and Chronic Health Evaluation-III and stroke *** factors were calculated to standardise comparisons between haematocrit tier and other *** Among n=3750 patients included in the analysis,the haematocrit values were≤27%in 2.1%(n=78),28%-32% in 6.2%(n=234),33%-37%in 17.9%(n=670),38%-42% in 36.4%(n=1366),43%-47% in 28.2%(n=1059)and≥48% in 9.1%(n=343).Patients with haematocrit≤27%,compared with patients in the 38%-42% range,were more likely to have died across all follow-up intervals,with statistically significant adj.sted ORs(aORs)ranging from 2.5 to *** with polycythaemia(ie,haematocrit≥48%)were at increased risk of in-hospital mortality(aOR=2.9;95%CI 1.4 to 6.0),compared with patients with mid-range admission *** differences between patients receiving and not receiving blood transfusion limited our ability to perform a propensity *** factors in the 1-year mortality model were 0.46(severe anaemia),0.06(cancer)and 0.018(heart disease).Conclusions Anaemia is independently associated with an increased risk of death throughout the first year post stroke;high haematocrit is associated with early poststroke *** anaemia is associated with 1-year mortality to a greater degree than cancer or heart dise

关键词： mortality admitted transfusion

Modeling Fiber Composites during the Cure Process for Piezoelectric Actuation

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World j.urnal of Mechanics 2013年第1期3卷 26-42页

作者： Darryl V. Murray Oliver j. myers 不详

Analytical, numerical, and experimental modeling methods are presented to predict deformation after the cure process of thin unsymmetric laminates for piezoelectric actuation. During fabrication, laminates deform to several post-cure room temperature shapes. Thin cross-ply laminates deform to a circular cylindrical post-cure shape while thicker laminates deform to a saddle shape. Post-cure shapes are dependent on ply orientation, thickness, and material properties. Because, CLT alone does not always predict the correct post-cure room temperature shape of the thin composite laminates, an extension of CLT with the Rayleigh-Ritz technique and potential energies are used to better predict these shapes. Finite element models are used to predict the post-cure room temperature shapes. Thin composite laminates are modeled coupling heat transfer and structural mechanics, which are necessary for modeling the cure process. Modeling the fabrication process captured important data such as residual stresses from the cure process, room temperature shapes, and bi-stability of the composite laminates. To validate these analytical and numerical results, experiments were con- ducted using macro-fiber composite (MFC) patches for morphing the laminates. The experimental piezoelectric morph- ing results relate well to analytical and numerical results.

关键词： Composite Piezoelectric Morphing Modeling

Effect　of　OH－　on　Fluorescence　Lifetime　and　Laser　Performance　of　Er3＋　Glass

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Chinese j.urnal of Lasers 1995年第4期B4卷 307-312页

作者： (Also with Shanghai institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800,China)j.ANG Yasi Daniel Rhonehouse WU Ruikun Michael j. myers j.hn D. myers(Kigre, Inc., Hilton Head, SC 29926, USA, 803-681-5800 Fax: 803-681-4559) Kigre Inc Hilton Head United States

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关键词： Erbium glass laser eye-safe laser