RANGE EXTENDER MODULE TRANSMISSION TOPOLOGY STUDY

Konrad Herold,Marius Böhmer,Rene Savelsberg,Alexander Müller,Jan Schröter,Jan Karthaus,Un-Jae Seo,Georg Jacbos,Kay Hameyer,Jakob Andert 한국자동차공학회 2018 International journal of automotive technology Vol.19 No.5

Range extender modules are one option to compensate for short drive ranges of electric vehicles. The close interaction of combustion engine and generator poses new challenges in development. A key requirement for range extender systems is to be light and virtually imperceptible in operation. High-speed electrical machines aim at increasing power density. However, their introduction in a range extender requires a gearbox. The combustion engine torque fluctuations can lead to rattle in the gearbox. The rattle can be overcome by a dual mass flywheel. An interdisciplinary model is developed and used to analyse three different range extender systems: one with a low speed generator without gearbox, one with a high-speed generator, and one with a high-speed generator and a dual mass flywheel. The efficiency was found to be higher for the system with a low speed generator, whereas the power density and the costs are beneficial for the high-speed concept. A dual mass flywheel eliminates the changes of torque direction in the gearbox. It reduces the speed fluctuations of the gearbox and generator by over 90 % compared to the low speed setup. But it increases rolling moment and subsequently chassis excitation compared to a setup with only a gearbox.

Synthesis of novel tin complexes using functionalized oxime ligands

Jung, E.A.,George, S.M.,Han, S.H.,Park, B.K.,Han, J.H.,Son, S.U.,Kim, C.G.,Chung, T.M. Elsevier Sequoia [etc.] 2016 Inorganica chimica acta Vol.446 No.-

<P>Novel tin complexes stabilized by alkoxy-functionalized oxime ligands [Sn(L-1)(2)](2) (1) and [Sn(L-2)(2)](2) (2), were prepared and characterized. Single-crystal X-ray diffraction analysis revealed that the complexes were obtained as dimers in which the tin metal centers are bridged by a pair of mu(2)-oxygen atoms. Due to the ligand steric effects, the metal centers in these complexes adopted an unusual distorted square pyramidal geometry and displayed interesting structural features. The thermo-gravimetric analyses of the complexes showed major mass loss in the 175-380 degrees C region. (C) 2016 Elsevier B.V. All rights reserved.</P>

Impact of fatty liver on long-term outcomes in chronic hepatitis B: a systematic review and matched analysis of individual patient data meta-analysis

Yu Jun Wong,Vy H. Nguyen,Hwai-I Yang,Jie Li,Michael Huan Le,Wan-Jung Wu,Nicole Xinrong Han,Khi Yung Fong,Elizabeth Chen,Connie Wong,Fajuan Rui,Xiaoming Xu,Qi Xue,Xin Yu Hu,Wei Qiang Leow,George Boon-B 대한간학회 2023 Clinical and Molecular Hepatology(대한간학회지) Vol.29 No.3

Background/Aims: Chronic hepatitis B (CHB) and fatty liver (FL) often co-exist, but natural history data of this dual condition (CHB-FL) are sparse. Via a systematic review, conventional meta-analysis (MA) and individual patient-level data MA (IPDMA), we compared liver-related outcomes and mortality between CHB-FL and CHB-no FL patients. Methods: We searched 4 databases from inception to December 2021 and pooled study-level estimates using a random- effects model for conventional MA. For IPDMA, we evaluated outcomes after balancing the two study groups with inverse probability treatment weighting (IPTW) on age, sex, cirrhosis, diabetes, ALT, HBeAg, HBV DNA, and antiviral treatment. Results: We screened 2,157 articles and included 19 eligible studies (17,955 patients: 11,908 CHB-no FL; 6,047 CHB-FL) in conventional MA, which found severe heterogeneity (I2=88–95%) and no significant differences in HCC, cirrhosis, mortality, or HBsAg seroclearance incidence (P=0.27–0.93). IPDMA included 13,262 patients: 8,625 CHB-no FL and 4,637 CHB-FL patients who differed in several characteristics. The IPTW cohort included 6,955 CHB-no FL and 3,346 CHB-FL well-matched patients. CHB-FL patients (vs. CHB-no FL) had significantly lower HCC, cirrhosis, mortality and higher HBsAg seroclearance incidence (all P≤0.002), with consistent results in subgroups. CHB-FL diagnosed by liver biopsy had a higher 10-year cumulative HCC incidence than CHB-FL diagnosed with non-invasive methods (63.6% vs. 4.3%, P<0.0001). Conclusions: IPDMA data with well-matched CHB patient groups showed that FL (vs. no FL) was associated with significantly lower HCC, cirrhosis, and mortality risk and higher HBsAg seroclearance probability.

Sex Differences in Serum C-Reactive Protein Course after Total Hip Arthroplasty

Sebastian Rohe,Eric Röhner,Christoph Windisch,Georg Matziolis,Steffen Brodt,Sabrina Böhle 대한정형외과학회 2022 Clinics in Orthopedic Surgery Vol.14 No.1

Background: Gender-specific medicine has become an important part in investigating the course of various diseases. C-reactive protein (CRP) is used as an inflammatory marker for detecting inflammations and even infections after total hip arthroplasty (THA). The general course of CRP after THA is well known, but there is controversy about its association with sex. Therefore, we aimed to investigate if there is an influence of sex on the CRP after THA in the first 10 days after operation in a complication-free course in male and female patients and to re-evaluate the specific postoperative CRP course with its maximum on the second to third postoperative days. Methods: We retrospectively reviewed patients who had been treated with THA due to primary osteoarthritis through the same approach using an equal model of a cementless stem and a cup and complication-free between 2013 and 2016. Patients with active inflammation, rheumatoid arthritis, secondary arthrosis, active cancer disease, and documented postoperative complications were not included. The CRP values before THA and up to 10 days after THA were recorded and tested for sex discrepancy. Factor analyses were performed, and CRP values were adjusted for confounders (age, operation time, diabetes mellitus, and body mass index [BMI]). Results: A total of 1,255 patients (728 women and 527 men) were finally analyzed. Men were younger and had a longer operation time and a higher BMI compared to women. The prevalence of overweight was higher in men, while obesity (BMI > 40 kg/m²), diabetes mellitus, renal failure, and American Society of Anaesthesiologists status showed no significant difference between men and women. Men had significantly higher CRP values than women between the 2nd and the 7th postoperative days, with the largest difference on the 4th postoperative day (men, 130.48 mg/L; women, 87.26 mg/L; p = 0.018). Conclusions: Based on the results of more precise sex-specific evaluation of the postoperative CRP course after THA, the present study showed for the first time that there was a gender discrepancy in the CRP course after complication-free THA in the first 7 postoperative days. Furthermore, this study confirmed the postoperative CRP course with its maximum on the third postoperative day.

Regioselective Synthesis of Polymers of Biological Potential via Alternating Copolymerization

George B . Butler 한국고분자학회 1995 한국고분자학회 학술대회 연구논문 초록집 Vol.1995 No.4

Modeling metal-sediment interaction processes: Parameter sensitivity assessment and uncertainty analysis

Cho, Eunju,Arhonditsis, George B.,Khim, Jeehyeong,Chung, Sewoong,Heo, Tae-Young Elsevier 2016 Environmental modelling & software Vol.80 No.-

<P><B>Abstract</B></P> <P>Sensitivity and uncertainty analysis of contaminant fate and transport modeling have received considerable attention in the literature. In this study, our objective is to elucidate the uncertainty pertaining to micropollutant modeling in the sediment-water column interface. Our sensitivity analysis suggests that not only partitioning coefficients of metals but also critical stress values for cohesive sediment affect greatly the predictions of suspended sediment and metal concentrations. Bayesian Monte Carlo is used to quantify the propagation of parameter uncertainty through the model and obtain the posterior parameter probabilities. The delineation of periods related to different river flow regimes allowed optimizing the characterization of cohesive sediment parameters and effectively reducing the overall model uncertainty. We conclude by offering prescriptive guidelines about how Bayesian inference techniques can be integrated with contaminant modeling and improve the methodological foundation of uncertainty analysis.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Sensitivity and uncertainty analysis was performed for sediment-metal modeling. </LI> <LI> Suspended sediment predictions are sensitive to critical erosion stress. </LI> <LI> Sediment bed-water partitioning coefficient is critical for metal predictions. </LI> <LI> River flow dynamics affect contaminant fate and model parameter sensitivity. </LI> <LI> Strategies to improve uncertainty analysis of sediment-metal modeling are discussed. </LI> </UL> </P>

Synthesis and structure of novel strontium complexes of unsymmetrically functionalized β-diketimine ligands

George, S.M.,Yon, G.H.,Park, B.K.,Lee, K.M.,Do, Y.,Kim, C.G.,Chung, T.M. Elsevier Sequoia [etc.] 2012 Inorganica chimica acta Vol.383 No.-

A series of tridentate β-diketiminate ligands, (2Z,4E)-4-{[2-(dimethylamino)ethyl]imino}-N-(propan-2-yl)pent-2-en-2-amine (L<SUP>1</SUP>H), (2Z,4E)-4-{[3-(dimethylamino)propyl]imino}-N-(tert-butyl)pent-2-en-2-amine (L<SUP>2</SUP>H), and (2Z,4E)-4-{[3-(dimethyl-amino)propyl]imino}-N-(propan-2-yl)pent-2-en-2-amine (L<SUP>3</SUP>H), and their strontium complexes, SrL<SUB>2</SUB><SUP>1</SUP> (1), SrL<SUB>2</SUB><SUP>2</SUP> (2), and SrL<SUB>2</SUB><SUP>3</SUP> (3) were synthesized as potential strontium precursors, by the reaction of Sr[N(SiMe<SUB>3</SUB>)<SUB>2</SUB>]<SUB>2</SUB> and two equivalents of L<SUP>1</SUP>H, L<SUP>2</SUP>H, and L<SUP>3</SUP>H, respectively. Compounds 1-3 were characterized by spectroscopic (IR, MS, <SUP>1</SUP>H and <SUP>13</SUP>C NMR), microanalytical methods, and single crystal X-ray diffractometry. The X-ray crystal structure reveals that complex 1 has a monoclinic space group, C2/c. The structure shows the bonding of two β-diketiminate ligands to the strontium metal through six nitrogen atoms. Additionally, the isopropyl groups on the ligands force 1 to attain a highly distorted octahedron. Thermogravimetric analyses of the compounds 1-3 exhibit a primary mass loss on 130-300<SUP>o</SUP>C region.

Baseball 4 All: Providing Inclusive Spaces for Persons with Disabilities

George B. Cunningham,Stacy Warner 글로벌지식마케팅경영학회 2019 Journal of Global Sport Management Vol.4 No.4

The purpose of this study was to examine the factors that influenced participation in a community program designed to enhance leisure participation among children and young adults with disabilities. The authors grounded their work in a sport development framework and recent work on inclusive and socially just leisure. Participants in the qualitative study included seven coaches from a baseball league designed to deliver sport opportunities for persons with both physical and intellectual disabilities. Results showed that Inclusiveness and Joy were fundamental at the recruitment stage. Organization Failure, which was the dominant theme throughout the data set, emerged at what should have been the retention stage. The authors discuss implications for providing inclusive leisure spaces for persons with disabilities.

A Site to Resist and Persist: Diversity, Social Justice, and the Unique Nature of Sport

George B. Cunningham,Marlene A. Dixon,John N. Singer,Kristi F. Oshiro,Na Young Ahn,Anthony Weems 글로벌지식마케팅경영학회 2021 Journal of Global Sport Management Vol.6 No.1

Scholarly debate on the unique characteristics of sport management continues, with much of the dialogue focusing on the sport product, the relationship between sport and external stakeholders (e.g. fans, government, leagues), as well as the unique role that fans and win- ning play in the delivery of sport. In offering a new lens from which to approach the academic argument, the authors suggest that sport is unique because it serves as a site for coaches and athletes to resist and persist through their activist efforts. To support this pos- ition, they (a) articulate the significance of sport in society for fans and non-fans, alike; (b) demonstrate how, because of the relevance of sport in society, coaches and athletes have taken on celebrity sta- tus, and as a result, are likely to engage in activism and resistance; and (c) propose these activities then result in societal change. Noting the importance of moderators, the authors also suggest that coach and athlete demographics, their social justice orientation, and the context in which they operate are all likely to influence the rela- tionship between celebrity status and activism and resistance. The effectiveness of their message is likely to vary based on their cred- ibility and the involvement and demographics of the message receiver. The authors offer theoretical and practical implications.

信仰과 Multiversity

George. B. Grant 세계평화교수협의회 1978 廣場 Vol.56 No.-