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Jang Pyo Hong,Young-Shik Kim,Hyung-Won Shim,Hee-Jin Kang,YunHo Kim,Gyu Bum Kim,Seongpil Cho 한국해양공학회 2021 韓國海洋工學會誌 Vol.35 No.1
As increasing the international community’s awareness of greenhouse gas reduction, the demand for eco-friendly ship fuel has accelerated recently. The fundamental aim of this study is to develop a new type of fully electrified ferry for passengers and cars considering Korean domestic coastal environmental conditions. Several technical difficulties are encountered in applying a fully electric propulsion system based on removable battery systems into a ship due to limitations imposed by the batteries’ size and capacity. This paper reviews and analyzes marine environment regulations strengthened recently, technology trends related to fully electric propulsion vessels in each country, and Korean domestic coastal environments. We propose a new fully electrified car ferry design with a displacement of 400 t applied in Korea. It is powered by removable battery systems pre-charged in a safe inland charging station. The mobile battery system is developed to enable roll-on and roll-off using wheels. The characteristics of the ship motion are analyzed based on the weight and location of the battery systems. We expect our battery systems to be applicable to larger ships in the future.
( Won Ku Lee ),( Kyoungjune Pak ),( Seong Jang Kim ),( Junhee Han ),( Jeong Min Kim ),( Gun Wook Kim ),( Margaret Song ),( Hoon Soo Kim ),( Hyun Chang Ko ),( Moon Bum Kim ),( Byung Soo Kim ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.2
Background: There is increasing awareness that psoriasis is a systemic, immune-mediated inflammatory disease including skin and joint. Objectives: To detect and quantify systemic and vascular inflammation in patients with moderate to severe psoriasis using [18F]-fluorodeoxyglucose positron emission tomography- computed tomography (18FDG PET/CT). Furthermore, to investigate the relationship between PASI score and FDG uptake in the liver, spleen and aorta. Methods: Case series with a nested case-control study was done. Twenty seven patients with moderate to severe psoriasis and twenty five controls age and sex matched underwent 18FDG PET/CT. FDG uptakes in the liver, spleen and 5 segments of aorta were evaluated by calculating the maximum standardized uptake value (SUVmax). Results: 18FDG PET/CT of patients with moderate to severe psoriasis demonstrated increased FDG uptakes in the liver and spleen compared with the controls. There were increased FDG uptakes in the liver, spleen and all segments of aorta with psoriasis group of high PASI score compared to the group with low PASI score. Conclusion: This study shows that systemic inflammation is increased in psoriasis patients compared to the controls, and there is correlation between psoriasis severity and systemic and vascular inflammation. We also suggest that 18FDG PET/CT can be used to identify systemic and vascular inflammation in psoriasis patients.
Jang Seok-Myeong,You Dae-Joon,Lee Sung-Ho,Jang Won-Bum The Korean Institute of Electrical Engineers 2005 KIEE International Transactions on Electrical Mach Vol.b5 No.1
The development of modern high-energy magnet materials has allowed the replacement of field coils in many different types of electromagnetic energy conversion machines. As well, the linear synchronous motor has recently been proposed for linear motion with high efficiency and thrust. Thus, this paper presents an analytical solution for the high thrust and cost reduction of the Iron-Cored Permanent Magnet Linear Synchronous Motor (PMLSM) considering magnetization arrays and geometry. Hence, the superior utilization points in each of the magnetization arrays are provided by the height ratio of the magnet/air-gap and magnet/winding coil, etc. In formulation, the space harmonic method in analytical solutions and the generalized 2-D tensor finite element analysis can be used to evaluate force components in magneto static devices including the magnetostrictive phenomenon.
Jang, Won Il,Kim, Mi-Sook,Bae, Sun Hyun,Cho, Chul Koo,Yoo, Hyung Jun,Seo, Young Seok,Kang, Jin-Kyu,Kim, So Young,Lee, Dong Han,Han, Chul Ju,Kim, Jin,Park, Su Cheol,Kim, Sang Bum,Cho, Eung-Ho,Kim, Youn BioMed Central 2013 Radiation oncology Vol.8 No.-
<P><B>Background</B></P><P>Recent studies using stereotactic body radiotherapy (SBRT) for hepatocellular carcinoma (HCC) have reported high tumor response and local control. However, the optimal SBRT dose remains unknown, and it is still not clear whether a dose response relationship for local control (LC) and overall survival (OS) exist or not. We performed this study to determine whether a dose response relationship for LC and OS is observed in SBRT for inoperable HCC.</P><P><B>Methods</B></P><P>Between 2003 and 2011, 108 patients with HCC were treated with SBRT. All patients were unsuitable for surgery or local ablation and had incomplete response to transarterial chemoembolization. Eighty-two patients with a longest tumor diameter (LD) less than or equal to 7.0 cm who were treated with 3-fraction SBRT and were analyzed. This cohort comprised 74 Child-Turcotte-Pugh (CTP) class A patients and 8 CTP class B7 patients. The median LD was 3.0 cm (range, 1.0–7.0 cm), and the median dose was 51 Gy (range, 33–60 Gy).</P><P><B>Results</B></P><P>LC and OS rates at 2 years after SBRT were 87% and 63%, respectively, with a median follow-up duration of 30 months for all patients. The 2-year LC/OS rates for patients treated with doses of > 54, 45–54, and < 45 Gy were 100/71, 78/64, and 64%/30%, respectively (p = .009/p < .001). Multivariate analysis revealed that the SBRT dose (p = .005) and Barcelona Clinic Liver Cancer stage (p = .015) were significant prognostic factors for OS. Correlation analysis revealed a positive linear relationship between the SBRT dose and LC (p = .006, R = .899)/OS (p = .002, R = .940) at 2 years. Based on the tumor-control probability model, a dose of 54.8 Gy provides 2-year LC with a 90% probability. Five patients experienced grade 3 or higher gastrointestinal toxicity, and 6 had deteriorating of CTP score by greater than or equal to 2 within 3 months of SBRT.</P><P><B>Conclusions</B></P><P>This study demonstrated a dose response relationship for LC and OS with SBRT for HCC. Higher LC rates resulting from an increased dose may translate into survival benefits for patients with HCC.</P>