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医用生物力学 2013年第S1期28卷 9-11页

作者： Vivian K.lee Seung-Schik Yoo Peter Vincent Guohao Dai Department of Biomedical Engineering Rensselaer Polytechnic Institute Department of Radiology Brigham and Women's HospitalHarvard Medical School Center for Cardiovascular Sciences Albany Medical College

Introduction:3D bio-printing technology[1-3]（Figure 1）capable of dispensing live cells,soluble factors,and phase-changing hydrogel in a desired pattern,has great potential in creating 3D ***,maintaining the viability of a thick tissue structure during tissue growth and maturation is challenging due to lack of adequate vascular *** a simple tissue model with

关键词： hydrogel printing perfusion dynamically challenging viability maintaining desired thick capable

Effects of smoking on cerebral and ventricular volumes in healthy males

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Neural Regeneration Research 2011年第1期6卷 72-75页

作者： Hyun-Jun Kim Mi-Hyun Choi Beob-Yi lee Su-Jeong lee Jae-Woong Yang Ji-Hye Kim Jin-Seung Choi Dong-Won Kang Jang-Yeon Park Jae-Hoon Jun Gye-Rae Tack Soon-Cheol Chung Department of Obstetrics & Gynecology Konkuk University Department of Biomedical Engineering Research Institute of Biomedical EngineeringCollege of Biomedical & Health ScienceKonkuk University Department of Anatomy School of MedicineKonkuk University

Previous studies have reported decreased cerebral volume as a result of smoking. However, little is known about accompanying changes in ventricular volume for healthy subjects who smoke, although ventricular volume is increased in patients with multiple sclerosis who smoke. The present study analyzed whether cerebral volume decreased with smoking through the use of magnetic resonance imaging. In addition, accompanying changes in ventricular volume that resulted from decreased cerebral volume and smoking were analyzed in healthy subjects. When multivariate analysis of covariance was performed by integrating the 2 age groups, aged 20-28 years and 40-49 years, with statistical significance, results showed that cerebral volume of smokers was smaller and ventricular volume was greater compared with the non-smokers. These findings suggest that ventricular volume changes could be utilized to characterize the effects of smoking.

关键词： smoking cerebral and ventricular volumes magnetic resonance imaging

Impact of body mass index and gender on quality of life in patients with gastroesophageal reflux disease

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World Journal of Gastroenterology 2012年第36期18卷 5090-5095页

作者： Shou-Wu lee Han-Chung Lien Chi-Sen Chang Yen-Chun Peng Chung-Wang Ko Ming-Chih Chou Institute of Medicine Chung Shan Medical University Division of Gastroenterology Department of Internal MedicineTaichung Veterans General Hospital Department of Medicine Chung Shan Medical University Department of Medicine China Medical University

AIM:To investigate the symptom presentation and quality of life in obese Chinese patients with gastroesophageal reflux disease(GERD).METHODS:Data from patients diagnosed with GERD according to the Montreal definition,were collected between January 2009 to March *** enrolled patients were assigned to the normal [body mass index(BMI) 30 kg/m 2) *** demographic data,endoscopic findings,and quality of life of the three groups of patients were analyzed and ***:Among the 173 enrolled patients,102,56 and 15 patients were classified in the normal,overweight,and obese,*** was significantly more erosive esophagitis(73.3% vs 64.3% vs 39.2%,P = 0.002),hiatal hernia(60% vs 33.9% vs 16.7%,P = 0.001),and males(73.3% vs 73.2% vs 32.4%,P = 0.001) in the obese *** severity and frequency of heartburn,not acid regurgitation,was positively correlated with BMI,with a significant association in men,but not in *** patients were prone to have low quality of life scores,with obese women having the lowest scores for mental ***:In patients with GERD,obese men had the most severe endoscopic and clinical *** women had the poorest mental health.

关键词：生活质量患者食管反流指数和体质量性别胃

Effects of elevated temperatures on growth and photosynthetic performance of polar Chlorella

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Advances in Polar Science 2020年第2期31卷 124-131页

作者： Syazana ANUWAR Ming-Li TEOH Wei-Hsum YAP Fong-lee NG Siew-Moi PHANG School of Biosciences Taylor’s UniversityLakeside Campus47500 Subang JayaSelangor Darul EhsanMalaysia Institute of Ocean and Earth Sciences(IOES) University of Malaya50603 Kula LumpurMalaysia National Antarctic Research Centre Institute of Graduate Studies50603 Kula LumpurMalaysia Faculty of Applied Sciences UCSI University56000 Kuala LumpurMalaysia

Global warming has been the subject of concern in today’s world with elevating temperature causing the melting of polar ice and increasing sea *** aim of this study was to investigate the physiological and photosynthetic performance of two polar Chlorella,namely Chlorella UMACC 250 and Chlorella UMACC 234 to elevating temperatures as might be experienced under future warming *** cultures were exposed to three different temperatures of 4℃,8℃and 12℃.The growth and photosynthetic activity were determined every 2 d for a period of 10 *** the end of the experiment,the cultures were harvested and analysed for biochemical *** Chlorella strains were able to tolerate higher temperatures than their ambient *** final pigments content showed an increasing trend with increased temperatures for both *** photosynthetic activities were measured using pulse-amplitude modulation(PAM)*** photosynthetic parameters including maximum quantum efficiency(Fv/Fm),maximum relative electron transport rate(r ETRmax),light harvesting efficiency(a)and photoadaptive index(Ek)were derived from the rapid light curves(RLCs).Both Chlorella strains showed a slight decline in growth and photosynthetic activities at the initial part of the ***,they showed the ability to recuperate with Chlorella UMACC 250 recovers better compared to Chlorella UMACC *** Chlorella strains showed similar trend in their carbohydrate content at 12℃,while the protein content of Chlorella UMACC 234 decreased when exposed to increasing *** results indicated that polar Chlorella are able to survive at increased temperatures throughout the experiment.

关键词： polar Chlorella photosynthesis pulse-amplitude modulation(PAM)fluorometry

Gender differences in the impact on subjective well-being in China

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Economic and Political Studies 2018年第4期6卷 349-367页

作者： Tao Tao Byron Y.lee Lynda Jiwen Song Xiangdong Liu School of Sociology and Population Studies Center for Population and Development StudiesRenmin University of ChinaBeijingChina China Europe International Business School(CEIBS) ShanghaiChina School of Business Renmin University of ChinaBeijingChina

This article examines the relationship among subjective well-being(SWB),income and education in China through self-perceived social *** and women appear to use different socioeconomic markers to determine their self-perceived social status,which ultimately affects their subjective reports of *** using the data from the 2010 China General Social Survey(CGSS),this study finds a positive association between income and SWB for *** result also shows a positive association between education and SWB for ***,for women self-perceived social status is a strong mediator of income and happiness;while for men,selfperceived social status mediates the relationship between education and *** study highlights the importance of the cultural influence in understanding the differences in self-perceived social status outcomes by gender and how these differences ultimately influence the subjective measures of well-being in China.

关键词： China gender selfperceived status subjective well-being(SWB)

Bubble-Enriched Smoothed Finite Element Methods for Nearly-Incompressible Solids

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Computer Modeling in Engineering & Sciences 2021年第5期127卷 411-436页

作者： Changkye lee Sundararajan Natarajan Jack S.Hale Zeike A.Taylor Jurng-Jae Yee Stephane P.A.Bordas University Core Research Center for Disaster-Free and Safe Ocean City Construction Dong-A UniversityBusan49315Korea Department of Mechanical Engineering Indian Institute of Technology MadrasChennai600036India Faculty of Science Technology and CommunicationUniversity of LuxembourgEsch-sur-AlzetteL-4364Luxembourg CISTIB-Center for Computational Imaging&Simulation Technologies in Biomedicine School of EngineeringLeedsLS29JTUK

This work presents a locking-free smoothed finite element method(S-FEM)for the simulation of soft matter modelled by the equations of quasi-incompressible *** proposed method overcomes well-known issues of standard finite element methods(FEM)in the incompressible limit:the over-estimation of stiffness and sensitivity to severely distorted *** concepts of cell-based,edge-based and node-based S-FEMs are extended in this paper to ***,a cubic bubble function is utilized to improve accuracy and *** the bubble function,an additional displacement degree of freedom is added at the centroid of the *** numerical studies are performed demonstrating the stability and validity of the proposed *** obtained results are compared with standard FEM and with analytical solutions to show the effectiveness of the method.

关键词： Strain smoothing smoothed finite element method bubble functions hyperelasticity mesh distortion

金属间化合物厚度对静液挤压Al/Cu蜂窝状棒材各向异性的影响（英文）

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Transactions of Nonferrous Metals Society of China 2016年第2期26卷 456-463页

作者： Tae-hyuk lee Moon-soo SIM Sin-hyeong JOO Kyoung-tae PARK Ha-guk JEONG Jong-hyeon lee Graduate School of Department of Advanced Materials Engineering Chungnam National University Rapidly Solidified Materials Research Center Chungnam National University Graduate School of Energy Science & Technology Chungnam National University Rare Metal R&D Group Korea Institute of Industrial Technology Advanced Fusion Process R&D Group Korea Institute of Industrial Technology

研究了金属间化合物厚度对蜂窝状棒材热性能和力学性能的影响。在200℃下采用重复静液挤压制备Al/Cu蜂窝状棒材。在制备过程中,Al/Cu界面生成1μm厚的金属间化合物层。经420℃退火0.5-2 h后续热处理后,可获得不同厚度的金属间化合物层,... 详细信息

研究了金属间化合物厚度对蜂窝状棒材热性能和力学性能的影响。在200℃下采用重复静液挤压制备Al/Cu蜂窝状棒材。在制备过程中,Al/Cu界面生成1μm厚的金属间化合物层。经420℃退火0.5-2 h后续热处理后,可获得不同厚度的金属间化合物层,最厚可达10.1μm。经鉴定,金属间化合物层为Al2Cu（θ）、AlCu（η2）和Al4Cu9（γ1）相。随着金属间化合物层厚度的增加,纵向和截面方向上的热导率分别减小11.9%（从（268±4.8）到（236±4.4）W/（m·K））和10.4%（从（210±3.2）到（188±2.8）W/（m·K））,Al/Cu蜂窝状棒材的抗拉强度和伸长率分别是（103±8.4）MPa和（73±6.2）%。当金属间化合物层厚度达到7.7μm时,抗拉强度增加至（131±6.5）MPa,随着金属间化合物层厚度增加至10.1μm时,抗拉强度降低至（124±3.9）MPa。随着金属间化合物层厚度增加,蜂窝状棒材的伸长率急剧下降至（29±2.5）%。

关键词：金属间化合物 Al/Cu蜂窝状棒材各向异性热导率拉伸强度静液挤压

Early testing of insulin resistance: a tale of two lipid ratios in a group of 5th graders screened by the Coronary Artery Risk Detection in Appalachian Communities Project (CARDIAC Project)

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World Journal of Pediatrics 2019年第4期15卷 398-404页

作者： Charles Ituka Mosimah Christa Lilly Awung-Njia Forbin Pamela J.Murray lee Pyles Elloise Elliot William Neal West Virginia University MorgantownUSA University of Yaounde I YaoundeCameroon

Background In West Virginia (WV),47% of fifth-grade children are either overweight or *** is no clear consensus regarding the definition of insulin resistance in children,and directly measuring insulin on the population level is *** proposed measures examined further in this study include triglyceride (TRIG)/high-density lipoprotein cholesterol (HDL-C) ratio and TRIG/low-density lipoprotein (LDL-C) *** purpose of this study is to examine the relationship between TRIG/HDL-C ratio,TRIG/LDL-C ratio and insulin resistance in fifth-graders with acanthosis nigricans (AN).Methods Between 2007 and 2016,52,545 fifth-grade students in WV were assessed for *** glucose and insulin levels were collected only for a sub-group of students who were AN-positive and was used to determine insulin resistance using the Homeostatic Model for Insulin Resistance (HOMA-IR) *** analysis included t tests and logistic regression with receiver operating characteristic *** Of the students assessed for AN,4.5% (n =2360) tested *** prevalence of insulin resistance was 79% (n =814) among 1030 with AN and complete ***/HDL-C ratio and TRIG/LDL-C ratio were significantly associated with insulin resistance (TRIG/HDL-C:Est.=0.36,P < 0.0001,AUC =0.68;TRIG/LDL-C:Est.=0.87,P < 0.0001,AUC =0.69).Multivariate analysis showed that increased body mass index (Est.=0.05,P < 0.0001),gender (Est.=0.49,p < 0.0001) and TRIG/HDL-C ratio (Est.=0.21,P < 0.0001) were significantly associated with insulin *** TRIG/HDL-C is a better surrogate marker of insulin resistance in AN-positive children compared to TRIG/ LDL-C ratio;so,on a population-level,cholesterol rather than insulin may be obtained for preliminary testing of early insulin resistance in children.

关键词： Acanthosis nigricans CARDIAC Project High-density lipoprotein cholesterol Insulin resistance Low-density lipoprotein cholesterol

SENSITIVITY STUDY OF THE EFFECTS OF WAVE-INDUCED VERTICAL MIXING ON VERTICAL EXCHANGE PROCESSES

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Journal of Hydrodynamics 2010年第3期22卷 410-418页

作者： LIANG Bing-chen lee Dong-yong LI Hua-jun ZHANG Jing Key Laboratory of Ocean Engineering Shandong Province Ocean University of China Qingdao 266100 China Coastal and Harbour Engineering Research Center Korea Ocean Research and Development Institute AnsanKorea College of Engineering Ocean University of China Qingdao 266100 China

The hydrodynamic model COHERENS-SED, developed by the present authors through introducing wave-enhanced bottom stress, wave dependent surface drag coefficient, wave-induced surface mixing, SWAN to COHERENS, is modified to account for wave-induced vertical mixing. The COHERENS-SED model can also be used for one-dimensional, two-dimensional, three-dimensional current and salinity calculations. One-dimensional model and three-dimensional model are used to study the effects of the wave-induced vertical mixing. The horizontal current velocity profiles obtained by the model are in good agreement with the analytical velocity profiles under the same input conditions. Numerical results show that higher wave height would generally generate larger vertical eddy viscosity and lower horizontal velocity. The results for fresh water in Yellow River Delta show that the wave-induced vertical mixing increases the momentum of fresh water transferring ability downwards to seabed and salt water＇s mixing with upper fresh water. Fresh water flume length is compressed considerably.

关键词： Yellow River Delta COHERENS SWAN COHERENS-SED wave-induced vertical mixing

Effect of heat treatment on LPSO morphology and mechanical properties of Mg-Zn-Y-Gd alloys

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Journal of Magnesium and Alloys 2020年第4期8卷 1120-1127页

作者： Hongxin Liao Jonghyun Kim Taekyung lee Jiangfeng Song Jian Peng Bin Jiang Fusheng Pan College of Materials Science&Engineering Chongqing University400044China National Engineering Research Center for Magnesium Alloys Chongqing University400044China School of Mechanical Engineering Pusan National UniversityBusan 46241Korea

The mechanical properties and microstructure were investigated under different Zn content and heat treatment conditions in a Mg-Zn-YGd cast alloy.A part of the long period stacking order(LPSO)phases transformed to W-M^ZnaRE?phases with an increase in Zn content from 0.9 at.%to 1.8 at.%,and the ultimate tensile strength(UTS)increased from 229 MPa to 248 *** solution treatment at 480°C,the content of the LPSO phase and strength sharply decreased in the Mg-1.8Zn-0.8Y-0.8Gd alloy,whereas this change was not significantly observed in the Mg-0.9Zn-O.8Y-O.8Gd *** solution treatment,the elongation significantly improved and the UTS sharply decreased in both *** lamellar and filminess LPSO phases were observed with aging treatment at 200℃.Moreover,the strengthening efficiency of lamellar and filminess LPSO phases was lower than that of the block LPSO ***,the UTS of the T6 state was lower than that of the as-cast alloy.

关键词： Mg alloy LPSO Age behavior Mechanical properties Heat treatment Strengthening efficiency