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Risk factors for liver disease among adults of Mexican descent in the United States and Mexico

World Journal of Gastroenterology 2018年第37期24卷 4281-4290页

作者： Yvonne n Flores Zuo-Feng Zhang Roshan Bastani Mei Leng Catherine M Crespi Paula Ramírez-Palacios Heather Stevens Jorge Salmerón Unidad de Investigación Epidemiológica y en Servicios de Salud Delegación MorelosInstituto Mexicano del Seguro SocialCuernavacaMorelos 62000México UCLA Department of Health Policy and Management and Kaiser Permanente Center for Health Equity Fielding School of Public HealthLos AngelesCA 90095United States UCLA Cancer Prevention and Control Research Center Fielding School of Public Health and Jonsson Comprehensive Cancer CenterLos AngelesCA 90095United States UCLA Division of General Internal Medicine and Health Services Research Los AngelesCA 90095United States UCLA Department of Biostatistics Fielding School of Public HealthLos AngelesCA 90095United States University of Washington School of MedicineSeattleWA 98195United States Universidad nacional Autónoma de México Academic Epidemiology Research UnitAvenida Universidad 3000Ciudad UniversitariaCoyoacánMexico City 04510México Centro de Investigación en Salud Poblacional Instituto Nacional de Salud PúblicaCuernavacaMorelos 62100México

AIM To compare the prevalence of chronic liver disease(CLD) risk factors in a representative sample of MexicanAmericans born in the United States(US) or Mexico, to a sample of adults in *** Data for Mexican-Americans in the US were obtained from the 1999-2014 national Health and nutrition Examination Survey(nHAnES), which includes persons of Mexican origin living in the US(n = 4274). The nHAnES sample was restricted to Mexican-American participants who were 20 years and older, born in the US or Mexico, not pregnant or breastfeeding, and with medical *** data in Mexico were obtained from the 2004-2013 Health Worker Cohort Study in Cuernavaca, Mexico(n =9485). The following known risk factors for liver disease/cancer were evaluated: elevated aminotransferase levels(elevated alanine aminotransferase was defined as > 40 IU/L for males and females; elevated aspartate aminotransferase was defined as > 40 IU/L for males and females), infection with hepatitis B or hepatitis C,metabolic syndrome, high total cholesterol, diabetes,obesity, abdominal obesity, and heavy alcohol use. The main independent variables for this study classified individuals by country of residence(i.e., Mexico vs the US) and place of birth(i.e., US-born vs Mexico-born).Regression analyses were used to investigate CLD risk *** After adjusting for socio-demographic characteristics,Mexican-American males were more likely to be obese,diabetic, heavy/binge drinkers or have abdominal obesity than males in Mexico. The adjusted multivariate results for females also indicate that Mexican-American females were significantly more likely to be obese, diabetic, be heavy/binge drinkers or have abdominal obesity than Mexican females. The prevalence ratios and prevalence differences mirror the multivariate analysis findings for the aforementioned risk factors, showing a greater risk among US-born as compared to Mexico-born MexicanAmericans. COnCLUSIOn In this study, Mexican-Americans i

关键词： Liver disease Risk factors Health disparities Mexico Mexican Americans Latinos

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Design and development of self-cleaning PV sliding system

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Clean Energy 2022年第3期6卷 392-403页

作者： Vinay Gupta Madhu Sharma Rupendra Pachauri K n Dinesh Babu Department of Electrical Engineering Manipal University Jaipur-303007India School of Engineering University of Petroleum and Energy StudiesDehradun-248007India Megger Group Ltd MylaporeChennai-600004India

This study describes the designing steps of the proposed self-cleaning system for the photovoltaic(PV)system and experimentally investigates the effectiveness of the proposed self-cleaning PV sliding system for solar power plants under all Indian climate *** investigate the performance of the proposed self-cleaning PV sliding system,we used three PV panels of 20 W with a sliding structure and another set of three PV panels of 20 W with a traditional(fixed)technique,and recorded the output power for the period of December 2019 to April *** experimental results show that the proposed self-cleaning PV sliding system improved efficiency by 18.3%,13.3%and 6.4%,respectively,in the summer,winter and post-monsoon seasons when compared to the fixed PV *** results also revealed that energy consumption was very low when compared to the amount of energy *** proposed system not only cleans the PV system,but also protects it from *** results of this study show that there is a significant improvement in PV efficiency and thus an increase in electricity production under all climate conditions.

关键词： solar energy photovoltaics cleaning soiling hailstorm protection sliding PV system

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表面致密化——一种提高烧结齿轮性能的有效方法

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粉末冶金技术 2005年第1期23卷 62-74页

作者：于洋 Linnea Fordén HgansAB

表面致密化与传统的粉末冶金方法相结合 ,可以显著改善烧结齿轮的疲劳及表面磨损性能 ,从而提高齿轮的寿命 ,同时使生产高性能齿轮的总成本降低 ,为用粉末冶金 (PM)方法生产汽车变速箱齿轮提供了更大的可能性。本文着重讲述了使用这种... 详细信息

表面致密化与传统的粉末冶金方法相结合 ,可以显著改善烧结齿轮的疲劳及表面磨损性能 ,从而提高齿轮的寿命 ,同时使生产高性能齿轮的总成本降低 ,为用粉末冶金 (PM)方法生产汽车变速箱齿轮提供了更大的可能性。本文着重讲述了使用这种方法生产高性能PM齿轮的工艺过程 ,同时介绍了测定致密化效果及齿轮性能的几种主要方法 ,并根据工艺过程比较了使用传统的机加工方法及本文所述的方法生产同性能齿轮的成本差别。最后 ,以两个实例分别介绍了使用上述方法对Volvo 85 0系第五挡变速齿轮及Scania载重车变速箱中行星齿轮的研发。

关键词：致密化高性能工艺过程表面磨损齿轮研发烧结高烧有效方法效果

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Thermophoresis and Brownian motion effects on boundary layer flow of nanofluid in presence of thermal stratification due to solar energy

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Applied Mathematics and Mechanics(English Edition) 2012年第6期33卷 765-780页

作者： n.AnBUCHEZHIAn K.SRInIVASAn K.CHAnDRASEKARAn R.KAnDASAMY Department of Mechanical Engineering Sri Guru Institute of Technology Department of Mechanical Engineering Anna University Department of Mechanical Engineering R.M.K.Engineering College Research Centre for Computational Mathematics Faculty of ScienceTechnology and Human DevelopmentUniversiti Tun Hussein Onn Malaysia

The problem of laminar fluid flow, which results from the stretching of a vertical surface with variable stream conditions in a nanofluid due to solar energy, is in- vestigated numerically. The model used for the nanofluid incorporates the effects of the Brownian motion and thermophoresis in the presence of thermal stratification. The sym- metry groups admitted by the corresponding boundary value problem are obtained by using a special form of Lie group transformations, namely, the scaling group of transfor- mations. An exact solution is obtained for the translation symmetrys, and the numerical solutions are obtained for the scaling symmetry. This solution depends on the Lewis number, the Brownian motion parameter, the thermal stratification parameter, and the thermophoretic parameter. The conclusion is drawn that the flow field, the temperature, and the nanoparticle volume fraction profiles are significantly influenced by these param- eters. nanofluids have been shown to increase the thermal conductivity and convective heat transfer performance of base liquids. nanoparticles in the base fluids also offer the potential in improving the radiative properties of the liquids, leading to an increase in the efficiency of direct absorption solar collectors.

关键词： solar radiation Brownian motion nanofluid thermophoresis thermalstratification

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Clean energy:A common goal for humanity Preface to the inaugural issue of Clean Energy

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Clean Energy 2017年第1期1卷 1-2页

作者： Dr Wen Ling norman n.Li 不详

Clean Energy-a new high-end academic journal-is launch-ing with this *** journal will include significant discoveries,as well as the latest developments and engineering practices relat-ing to the global energy science,technology,and engineer-ing *** is the basic material needed to guarantee the survival of *** countries give significant import-ance to energy technology and have formulated relevant energy policies and technical development strategies based on their resource endowment and technical and economic development levels.

关键词： Clean journal guarantee

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Reduction in secondary dendrite arm spacing in cast eutectic Al–Si piston alloys by cerium addition

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International Journal of Minerals,Metallurgy and Materials 2017年第1期24卷 91-101页

作者： R.Ahmad M.B.A.Asmael n.R.Shahizan S.Gandouz Department of Manufacturing and Industrial Engineering Faculty of Mechanical and Manufacturing EngineeringUniversiti Tun Hussein Onn MalaysiaParit Raja86400 Batu PahatJohorMalaysia

The effects of Ce on the secondary dendrite arm spacing（SDAS） and mechanical behavior of Al-Si-Cu-Mg alloys were investigated. The reduction of SDAS at different Ce concentrations was evaluated in a directional solidification experiment via computer-aided cooling curve thermal analysis（CA-CCTA）. The results showed that 0.1wt%-1.0wt% Ce addition resulted in a rapid solidification time, ？ts, and low solidification temperature, ？T_S, whereas 0.1wt% Ce resulted in a fast solidification time, Δ^（ta-Al）, of the α-Al phase. Furthermore, Ce addition refined the SDAS, which was reduced to approximately 36%. The mechanical properties of the alloys with and without Ce were investigated using tensile and hardness tests. The quality index（Q） and ultimate tensile strength of（UTS） Al-Si-Cu-Mg alloys significantly improved with the addition of 0.1wt% Ce. Moreover, the base alloy hardness was improved with increasing Ce concentration.

关键词： eutectic alloys aluminum silicon alloys cerium microstructure dendrites spacing mechanical properties

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Load Frequency Control of Multi-interconnected Renewable Energy Plants Using Multi-Verse Optimizer

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Computer Systems Science & Engineering 2021年第5期37卷 219-231页

作者： Hegazy Rezk Mohamed A.Mohamed Ahmed A.Zaki Diab n.Kanagaraj College of Engineering at Wadi Addawaser Prince Sattam Bin Abdulaziz UniversityWadi Addawaser11991Saudi Arabia Electrical Engineering Department Faculty of EngineeringMinia UniversityMinia61111Egypt

A reliable approach based on a multi-verse optimization algorithm(MVO)for designing load frequency control incorporated in multi-interconnected power system comprising wind power and photovoltaic(PV)plants is presented in this *** has been applied for optimizing the control parameters of the load frequency controller(LFC)of the multi-source power system(MSPS).The MSPS includes thermal,gas,and hydro power plants for energy ***,the MSPS is integrated with renewable energy sources(RES).The MVO algorithm is applied to acquire the ideal parameters of the controller for controlling a single area and a multi-area MSPS integrated with *** link is utilized in shunt with AC multi-areas interconnection tie *** proposed scheme has achieved robust performance against the disturbance in loading conditions,variation of system parameters,and size of step load perturbation(SLP).Meanwhile,the simulation outcomes showed a good dynamic performance of the proposed controller.

关键词： Load frequency control multi-verse optimization multi-area power system renewable energy sources

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Calculation of Vertical Mixing in Plane Turbulent Buoyant Jets on the Basis of the Algebraic Model of Turbulence

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Journal of Thermal Science 1992年第2期1卷 108-113页

作者： O.G.Martynenko V.n.Korovkin A.V.LuikovHeatandMassTransferInstitute Minsk220072USSR A.V.LuikovHeatandMassTransferInstitute Minsk

An algebraic model of turbulence,involving buoyancy forces,is used for calculating velocity and temperature fields in plane turbulent vertical jets in a non-homogeneous stagnant medium.A new approach to the solution of the governing system of partial differential equations (continuity,conservation of momentum,heat (buoyancy), turbulent kinetic energy,dissipation rate and mean quadratic temperature fluctuation) is suggested which is based on the introduction of mathematical *** is made between the results of the present calculations with experimental and numerical data of other authors.

关键词： turbulence model buoyancy force velocity and temperature fields turbulent vertical jets non-homogeneous medium

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Investigation of the Viscoelastic Effect on the Metzner and Otto Coefficient Through LDA Velocity Measurements

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Chinese Journal of Chemical Engineering 2001年第1期9卷 77-83页

作者： M.Jnhangiri M.R.Golkar-narenji n.Montazerin S.Savarmand DepartmentofChemical DepartmentofwMechanicalEngineering AmirkabirUniversityofTechnology（Tehranpolytechnic）No.424HafezAve.Tehran15914I.R.Iran

The Metzner and Otto correlation is the single practical method for incorporating non-newtonian effects in the mixing process. In this article, the Metzner and Otto' s idea, the role of viscoelasticity on the Metzner and Otto coefficient, ks, effects of flow regime on ks and the determination of fc3 for Rushton turbine impeller have been studied using the direct method of the laser Doppler anemometry (LDA) velocity measurement for the case of viscoelastic liquids. The normalized mean tangential velocity profiles are independent of Rushton turbine impeller speeds. Contrary to literature findings, it is shown that the variation of local shear rate against the impeller speed is better correlated by the power equation, i.e. y= k'a nb' , in the transition region, i. e. - 30 2000. Also, a correlation between improved coefficient, ks', and the elasticity number of viscoelastic liquids is given which is very helpful in designing of the mixing of both viscoelastic and inelastic non-newtonian fluids through relating rheological properties to kinematical and dynamical parameters of the mixing process.

关键词： viscoelastic mixing Rushton turbine impeller laser Doppler anemometry (LDA) Metzner and Otto coefficient

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苯噻草胺对水田土壤呼吸强度和酶活性的影响

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土壤学报 2004年第1期41卷 93-96页

作者：叶央芳闵航周湘池浙江大学生命科学学院杭州310029 宁波大学生命科学与生物工程学院浙江宁波315211

研究了除草剂苯噻草胺对水稻田土壤呼吸强度和酶活性的影响。表明苯噻草胺使用后初期刺激土壤呼吸作用但随后产生轻微抑制 ,能激活脱氢酶的活性 ,但抑制过氧化氢酶活性随后产生一定的刺激作用。苯噻草胺强烈抑制脲酶活性 ,轻微抑制蛋白... 详细信息

研究了除草剂苯噻草胺对水稻田土壤呼吸强度和酶活性的影响。表明苯噻草胺使用后初期刺激土壤呼吸作用但随后产生轻微抑制 ,能激活脱氢酶的活性 ,但抑制过氧化氢酶活性随后产生一定的刺激作用。苯噻草胺强烈抑制脲酶活性 ,轻微抑制蛋白酶活性 ,但对磷酸酶具有刺激作用 ,而且随苯噻草胺施用浓度的增加而刺激作用增强。

关键词：苯噻草胺水田土壤呼吸强度酶活性乙酰苯胺类除草剂

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