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Percutaneous coronary interventions in the elderly:a 10-year experience in Northern New England

Journal of Geriatric Cardiology 2005年第1期2卷 17-22页

作者： David J.Malenka James t.DeVries Samuel J.Shubrooks for the Northern New England Cardiovascular Disease Study Group Section of Cardiology Dartmouth-Hitchcock Medical Center LebanonNH Center for the Evaluative Clinical Sciences Dartmouth Medical SchoolHanoverNHUSA for the Northern New England Cardiovascular Disease Study Group Section of Cardiology Dartmouth-Hitchcock Medical Center LebanonNHUSA for the Northern New England Cardiovascular Disease Study Group Division of Cardiology Beth Israel-Deaconess Medical Center BostonMAUSA Jr

Background there is a paucity of information available for clinical decision making applying to the elderly patient population. therefore, data of percutaneous coronary interventions (PCI) including demographic information on the elderly patients, procedural practices, and outcomes are needed. Objectives and Methods From consecutive PCIs of participating institutions, demographics data, clinical, angiographic success and adverse clinical outcomes were collected. Standard statistical methods were used to compare crude differences in patient and procedural characteristics across age groups. Results At baseline, the prevalence of comorbid conditions ( renal failure and heart failure) increased with age. Unstable angina or a non-St elevation MI were the most common indications for PCI across all age groups. Fewer patients ≥ 80 years old were undergoing primary PCI and older patients were somewhat less likely to receive a Ⅱb/Ⅲa receptor blocker. Slightly more patients ≥ 80 years old underwent a 2-vessel PCI ( consistent with them having more multivessel disease) and these patients were more likely to have an intervention on a type C lesion. Compared to patients ＜ 50 years old, those aged ≥ 70 years old had a significantly increased risk of death, MI, stroke, or vascular complications at the access site. Conclusions this study suggests increasing age is associated with increasing risk for an adverse outcome following PCI. this is in part attributable to case-mix but likely, also related to the changing physiology of aging. Despite the increased risk of the procedure, the clinical success rate for PCI is quite high and makes it a reasonable alternative for the treatment of CAD in the elderly.

关键词： coronary artery disease elderly percutaneous coronary intervention

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等离子体浸没离子注入圆筒内表面的时空尺度

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核技术 2002年第9期25卷 709-713页

作者：田修波 D t K Kwok 童洪辉 Paul K Chu 香港城市大学

等离子体浸没离子注入与工件外表面的注入不同 ,存在空间和时间上的尺度。研究结果表明 ,由于内腔 ,如内筒的有限尺寸 ,使注入电压的利用率降低 ,同时使内部等离子体快速耗尽 ,对于特定的内筒 ,利用提高注入电压从而提高注入能量只能在... 详细信息

等离子体浸没离子注入与工件外表面的注入不同 ,存在空间和时间上的尺度。研究结果表明 ,由于内腔 ,如内筒的有限尺寸 ,使注入电压的利用率降低 ,同时使内部等离子体快速耗尽 ,对于特定的内筒 ,利用提高注入电压从而提高注入能量只能在一定的电压范围内实现。在典型的外表面注入工艺条件下 ,内表面离子的耗尽速度是惊人的。如在对于直径 2 0cm的圆筒在 30kV、2× 10 15ions/cm3的条件下 ,等离子体耗尽时间仅为 0 .5 5 μs ,这个时间甚至小于多数脉冲电源的上升沿时间。结果表明 ,内部等离子体源的硬件结构可能是一种有效的解决方法。

关键词：时空尺度等离子体浸没离子注入尺度效应圆筒内表面表面改性

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Effect of Nonlinear thermal Radiation on Boundary Layer Flow of Viscous Fluid over Nonlinear Stretching Sheet with Injection/Suction

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Journal of Applied Mathematics and Physics 2016年第2期4卷 307-319页

作者： t. Vijaya Laxmi Bandari Shankar Department of Mathematics Osmania University Hyderabad India Department of Mathematics M.V.S. Govt. Arts & Science College Mahabubnagar India

the present study reveals the effect of nonlinear thermal radiation and magnetic field on a boundary layer flow of a viscous fluid over a nonlinear stretching sheet with suction or an injection. Using suitable similarity transformations, governing partial differential equations were reduced to higher order ordinary differential equations and further these are solved numerically using of Keller-Box method. Effect of flow controlling parameter on velocity, temperature and nanoparticle fluid concentration, local skin friction coefficient, local Nusselt number and local Sherwood numbers are discussed. It is found that the dimensionless velocity decreases and temperature, concentration are increased with the increasing of magnetic parameter. the temperature profile is an increasing function of thermal radiation when it is increasing.

关键词： Nonlinear thermal Radiation Stretching Sheet Boundary Layer Keller-Box Method Suction/Injection

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Practical Implementation of Embedded Controlled Reduced Switch Z-Source Inverter-Fed Induction Motor Drive

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Circuits and Systems 2016年第9期7卷 2189-2195页

作者： K. Srinivasan t. Vijayakumar Department of EEE Tagore Engineering College Chennai India Sri Eshwar College of Engineering Coimbatore India

A cost-effective component minimized embedded controlled Z-source inverter for induction motor drive is presented. the proposed topology combines the advantages of a traditional four-switch three-phase inverter with the advantages of the z impedance network (two inductors in series and two X connected capacitors). this new topology, besides the self-boost property, has low switch count and it can operate as a buck-boost inverter. As a result, the new embedded controlled reduced switch Z-source inverter system provides ride through capability during voltage sags, reduces line harmonics, improves power factor, reliability and extends output voltage range. Analysis, simulation and experiment result will be presented to demonstrate these new features.

关键词： Embedded Controller Harmonic Distortion Four-Switch three-Phase Inverter Z-Source Inverter

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HOtSPOtS OF NUtRIENt LOSSES tO AIR AND WAtER:AN INtEGRAtED MODELING APPROACH FOR EUROPEAN RIVER BASINS

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Frontiers of Agricultural Science and Engineering 2023年第4期10卷 579-592页

作者： Aslihan URAL-JANSSEN Carolien KROEZE Jan Peter LESSCHEN Erik MEERS Peter J.t.M.VANPUIJENBROEK Maryna StROKAL Water Systems and Global Change Group Wageningen University&ResearchPO Box 476700AA Wageningenthe Netherlands Environmental Systems Analysis Group Wageningen University&ResearchPO Box 476700AA Wageningenthe Netherlands Wageningen Environmental Research PO Box 476700AA Wageningenthe Netherlands. Laboratory of Bioresource Recovery(RE-soURCE LAB) Ghent UniversityCoupure Links 6539000 GhentBelgium. PBL The Netherlands Environmental Assessment AgencyPO Box 303142500GH The Haguethe Netherlands.

Nutrient pollution of air and water is a persistent problem in ***,the pollution sources are often analyzed separately,preventingthe formulation of integrative *** study aimed to quantify the contribution of agriculture to air,river and coastal water pollution by nutrients.A new MARINA-Nutrients model was developed for Europe to calculate inputs of nitrogen(N)and phosphorus(P)to land and rivers,N emissions to air,and nutrient export to seas by river *** current practice,inputs of N and P to land were 34.4 and 1.8 ***^(-1),***,only 12%of N and 3%of P reached the *** was responsible for 55%of N and sewage for 67%of P in *** N emissions to air from agriculture were calculated at 4.0 ***^(-1).Almost twofifths of N emissions to air were from animal housing and *** a third of the basin area was considered as pollution hotspots and generated over half of N emissions to air and nutrient pollution in *** 25%of river export of N ended up in the Atlantic Ocean and of P in the Mediterranean *** results could support environmental policies to reduce both air and water pollution simultaneously,and avoid pollution swapping.

关键词： agriculture air-water modeling European rivers nutrient pollution sewage systems source attribution

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On the Norms of r-toeplitz Matrices Involving Fibonacci and Lucas Numbers

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Advances in Linear Algebra & Matrix theory 2016年第2期6卷 31-39页

作者： Hasan Gökbaş Ramazan türkmen Semsi tebrizi Anatolian Religious Vocational High School Konya Turkey Science Faculty Selcuk University Konya Turkey

Let us define to be a r-toeplitz matrix. the entries in the first row of are or;where Fn and Ln denote the usual Fibonacci and Lucas numbers, respectively. We obtained some bounds for the spectral norm of these ma... 详细信息

关键词： r-toeplitz Matrix Fibonacci Numbers Lucas Numbers Spectral Norm

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分子束外延高Mg掺杂GaN的发光特性

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发光学报 1999年第2期20卷 148-151页

作者：宋航 Park S H Kang t W Kim t W 中国科学院长春物理研究所

采用分子束外延技术在蓝宝石衬底上制备Ｍｇ掺杂的立方相ｐ－ＧａＮ，并对其不同温度下的光致发光光谱进行了研究．实验观察到高Ｍｇ掺杂ＧａＮ中施主受主对发光的反常温度行为．理论分析表明，高Ｍｇ掺杂ＧａＮ中施主受主对的发光受到... 详细信息

采用分子束外延技术在蓝宝石衬底上制备Ｍｇ掺杂的立方相ｐ－ＧａＮ，并对其不同温度下的光致发光光谱进行了研究．实验观察到高Ｍｇ掺杂ＧａＮ中施主受主对发光的反常温度行为．理论分析表明，高Ｍｇ掺杂ＧａＮ中施主受主对的发光受到陷阱与受主间竞争俘获非平衡空穴过程和空穴隧穿输运过程的影响．

关键词：光致发光隧穿效应分子束外延氮化镓掺镁

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the Disk-Magnet Electromagnetic Induction Applied to thermoelectric Energy Conversions

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World Journal of Engineering and technology 2022年第2期10卷 179-193页

作者： Hiroshi Uechi Schun t. Uechi Osaka Gakuin University Osaka Japan KPMG Ignition tokyo Data Tech. Tokyo Japan

the thermoelectric energy conversion technique by employing the Disk-Magnet Electromagnetic Induction (DM-EMI) and improved DM-EMIs is shown, and possible applications to heat engines as one of the energy harvesting technologies are also discussed. the idea is induced by integrating irreversible thermodynamical mechanism of a water drinking bird with that of a Stirling engine, resulting in thermoelectric energy generation different from conventional heat engines. the current thermoelectric energy conversion with DM-EMI can be applied to wide ranges of temperature differences. the mechanism of DM-EMI energy converter is examined in terms of axial flux magnetic lines and categorized as the axial flux generator. It is useful for practical applications to macroscopic heat engines such as wind, geothermal, thermal and nuclear power turbines and heat-dissipation lines, for supporting thermoelectric energy conversions. the technique of DM-EMI will contribute to environmental problems to maintain clean and susceptible energy as one of the energy harvesting technologies.

关键词： thermoelectric Energy Generation (tEG) thermomechanical Dynamics (tMD) Disk-Magnet Electromagnetic Induction (DM-EMI) Axial Flux Electric Generator (AFEG) Applications to Heat Engines

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Selenium’s Utility in Mercury toxicity: A Mini-Review

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Food and Nutrition Sciences 2021年第2期12卷 124-137页

作者： Roswell timmerman Stanley t. Omaye Department of Nutrition and the Environmental Sciences and Health Graduate Program University of Nevada Reno USA

Purpose: this review of the literature intends to provide readers an understanding of the prophylactic and antidotal usefulness of selenium (Se) for mercury (Hg) toxicity. We will provide an explanation of Hg and Se i... 详细信息

Purpose: This review of the literature intends to provide readers an understanding of the prophylactic and antidotal usefulness of selenium (Se) for mercury (Hg) toxicity. We will provide an explanation of Hg and Se interactions for potential remediation options to contaminated ecosystems. Design/methodology/approach: In this mini-review, we discuss mechanistic aspects between Hg and Se, the implication for health outcomes, and its usefulness in the ecological recovery of Hg contaminated areas. Findings: Mercury has a strong affinity for Se, resulting in Se-dependent enzymes and proteins’ deactivation with devastating consequences to the host. It is likely that Hg’s toxicity results in Se deficiency. Selenium compounds can have prophylactic or antidotal effects to prevent or reverse the adverse toxicity action of Hg exposure. Current research indicates that the chemical interactions between Hg and Se are unique. The Hg capturing capacity of Se is a million times higher than sulfur compounds and results in inactive complexes. Practical implications: Future work can target engineering methods for technologies that can reduce the toxicity of Hg in the environment. Originality/value: amily:Verdana;">the unique interactions between the elements are that Hg can compromise Se dependent enzymes;howeve

关键词： Mercury Selenium toxicity Selenoproteins Human Health Oxidative Stress

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Subgroup comparison of COVID-19 case and mortality with associated factors in Mississippi: findings from analysis of the first four months of public data

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the Journal of Biomedical Research 2020年第6期34卷 446-457页

作者： Lei Zhang Stephanie t.McLeod Rodolfo Vargas Xiaojian Liu Dorthy K.Young thomas E.Dobbs Office of Health Data and Research Mississippi State Department of HealthJacksonMS 39215USA School of Social Work College of Education and Human Sciencesthe University of Southern MississippiHattiesburgMS 39406USA Office of Health Data Operationsand ResearchMississippi State Department of HealthJacksonMS 39215USA Office of State Health Officer Mississippi State Department of HealthJacksonMS 39215USA.

We compared subgroup differences in COVID-19 case and mortality and investigated factors associated with case and mortality rate(MR)measured at the county level in *** were based on data published by the Mississippi State Department of Health between March 11 and July 16,*** COVID-19 case rate and case fatality rate(CFR)differed by gender and race,while MR only differed by *** aged 80 years or older and those who live in a non-metro area had a higher case rate,CFR,and *** controlling for selected factors,researchers found that the percent of residents who are obese,low income,or with certain chronic conditions were associated with the county COVID-19 case rate,CFR,and/or MR,though some were negatively *** findings may help the state to identify counties with higher COVID-19 case rate,CFR,and MR based on county demographics and the degree of its chronic conditions.

关键词： COVID-19 case rate case fatality rate mortality rate

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