컨테이너 검색기 이송대차 추진용 선형 유도전동기의 2차측 리액션플레이트 재질에 따른 특성 연구

정재훈(Jae-Hoon Jeong),최장영(Jang-Young Choi),성소영(So-Young Sung),박종원(Jong-Won Park),임재원(Jaewon Lim) 대한전기학회 2016 전기학회논문지 Vol.65 No.1

This paper presents the analysis of the analysis of thrust characteristics of linear induction motors(LIMs) according to secondary reaction plate. LIMs are well known as high speed transport systems, which can obtain thrust directly without gears and links, or auxiliary mechanisms. A simple structure, easy maintenance, and less environmental pollution are advantages of LIMs. In transport systems using LIMs, the secondary reaction plate is an important design factor, because it has considerable impact on the cost of the railway as well as the performance of the LIMs. This paper deals analyzed the characteristics of linear induction motor used for moving the vehicle of container scanner. Thrust, efficiency and load characteristic were interpreted with FEM regarding two models whose material of secondary reaction plate was copper and aluminum. It suggested the interpretation of thrust, efficiency and power factor characteristic along slip and compared the operation ability of linear induction motor through characteristics analysis along the load.

상생발전을 위한 수직·수평적 세수공유제도 도입 방안

임상빈 ( Lim Sang Bin ),최원삼 ( Choi Won Sam ) 한국지방세학회 2015 지방세논집 Vol.2 No.2

지속가능한 지방자치 발전을 위해서는 안정적인 세입이 확보되어야 한다. 그러나 우리나라 지방자치는 재정측면에서 중앙국가에 종속되어 있고, 자주 세원은 서울 경기에 편중되어 있어 독립된 지방자치로 발전해 나가지 못하고 있다. 지방의 재정이 중앙에 종속되어 자주재원이 부족한 지방자치단체는 이전재원 확보를 위해서 서울 사무소를 운영하는 등 이전재원확보 경쟁에 나서고 있다. 이러한 상황에서 비도시 지역인 농어촌 지역의 경우 인구의 고령화에 따라 인구가 점차 감소하고 있고 노령인구 증가에 따른 사회복지 수요는 매년 빠르게 증가하고 있어 지방재정의 어려움이 가중되고 있다. 본 연구는 서울 경기에 편중된 취득세와 국세의 중요 세목인 법인세를 세수공유 하는 일정 성장률 이상 세수 증가분은 지방으로 이전하게 하는 제도를 설계함으로서 수도권의 재원이 지방세 이전될 수 있는 시스템을 구축하여 비수도권에서 안정적으로 세입을 확보하고 중앙과 지방, 수도권과 비수도권이 서로 상생할 수 있는 세수공유 시스템을 구축해 보고자 하는데 그 목적이 있다. 본 연구에서 세수공유 시스템을 통해서 정상적인 세수보다 증가하는 이상적인 세입 증가가 발생하는 경우 이를 지방으로 이전시킴으로써 경기변동 및 부동산 시장의 변동에 따른 추가 세입분을 공유할 수 있게 하여 수도권과 비수도권 모두가 상생할 수 있는 제도적인 구조를 구축하는 방안을 제시하였다. 본 연구의 공헌점은 지방자치단체가 직면한 인구고령화라는 사회적인 문제에 선제적으로 대응하기 위한 방안으로 상호협력을 바탕으로 하는 세입분야의 세수공유를 통한 혼합재정 조정 방안을 제시하였다는데 그 의미가 있다. For the sustainable development of local government, it should be ensured a stable revenue. Korea local governments rely on the central government in terms of financing. Local governments are competing to obtain central government grants. The population is decreasing gradually but the welfare needs is increasesing because of elderly population increase. As a result, local financial difficulties is increasing. This study targeted the tax revenue sharing for win-win strategy between the central and local governments. The central government and local governments can help each other through tax revenue sharing. Urban and rural areas also can help through tax revenue sharing. This study proposes Mixed tax revenue exchange sharing Model. This model helps getting a stable revenue for local governments by mitigating rapid changes in economic cycles and property market. Contributions of this study is to present win-win model between the central and local governments. That is good solution for an aging society.

Association between shift work and inflammatory markers in workers at an electronics manufacturing company

Sung-Joon Woo,Chang-Ho Chae,Jae-Won Lim 대한직업환경의학회 2022 대한직업환경의학회지 Vol.34 No.-

Polyimide nonwoven fabric-reinforced, flexible phosphosilicate glass composite membranes for high-temperature/low-humidity proton exchange membrane fuel cells

Lim, Jun-Muk,Won, Ji-Hye,Lee, Hyeon-Ji,Hong, Young Taik,Lee, Moo-Seok,Ko, Chang Hyun,Lee, Sang-Young The Royal Society of Chemistry 2012 Journal of materials chemistry Vol.22 No.35

<P>We demonstrate polyimide (PI) nonwoven fabric-reinforced, flexible proton-conductive phosphosilicate glass composite membranes for potential application in high-temperature/low-humidity proton exchange membrane fuel cells (PEMFCs). The new reinforced composite membrane is fabricated <I>via</I> the impregnation of a 3-glycidyloxypropyl trimethoxysilane (GPTMS)/orthophosphoric acid (H<SUB>3</SUB>PO<SUB>4</SUB>) mixture into a PI nonwoven substrate followed by <I>in situ</I> sol–gel synthesis and hydrothermal treatment. This unique structural integrity enables the reinforced composite membrane to provide unprecedented improvement in the mechanical properties (notably flexibility and thickness) over typical bulk phosphosilicate glasses that are highly fragile and thick. Meanwhile, the highly porous structure of the PI reinforcing framework allows for the facile formation of a three-dimensionally interconnected phosphosilicate glass matrix in the reinforced composite membrane, which in turn offers favorable pathways for proton transport. Another advantageous feature of the reinforced composite membrane is higher proton conductivity under dehumidified conditions, as compared to a hydration-dependent polymer electrolyte membrane such as sulfonated poly(arylene ether sulfone) (SPAES). This superior proton conductivity of the reinforced composite membrane is further discussed with in-depth consideration of its architectural novelty and proton transport phenomena governed by the Grotthuss mechanism.</P> <P>Graphic Abstract</P><P>A PI nonwoven fabric-reinforced, flexible protonconductive phosphosilicate glass composite membrane is fabricated for high-temperature/low humidity PEMFCs. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2jm33406b'> </P>

FCP 1 : Magnesium ascorbyl phosphate regulates the expression of inflammatory biomarkers in cultured sebocytes

( Sang Lim Kim ),( Kyou Chae Lee ),( Jin Sub Lee ),( Yoon Hyuk Choi ),( Hyun Ho Son ),( Hong Dae Jung ),( Mi Yeung Sohn ),( Yong Hyun Jang ),( Seok Jong Lee ),( Do Won Kim ),( Weon Ju Lee ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2

Background: Acne is a inflammatory skin disorders caused by inflammatory biomarkers. Magnesium ascorbyl phosphate (MAP) is a stable precursor of vitamin C. It achieves a constant delivery of vitamin C into the skin and has antioxidative effects. Objectives: To evaluate changes in the expression of inflammatory biomarkers after treatment of cultured sebocytes with MAP Methods: RT-PCR, ELISA and western blotting were performed for inflammatory cytokines, matrix metalloproteinases (MMPs), antimicrobial peptides (AMPs) and keratinocyte differentiation markers before and after treatment of cultured sebocytes with MAP (10-2 mol), lipopolysaccharide (LPS) and a combination of MAP and LPS. RT-PCR and western blotting were also done for Toll-like receptor-4 (TLR-4) and NF-ĸB before and after treatment of cultured sebocytes with MAP, LPS and a combination of MAP and LPS. Results: The expressions of inflammatory cytokines (e.g., IL-1 β and IL-8) and MMPs (e.g., MMP-9) were decreased after treatment with MAP and a combination of MAP and LPS, and increased after treatment with LPS. AMPs (e.g., LL-37) were decreased after treatment with MAP and a combination of MAP and LPS, and increased after treatment with LPS. The expression of TLR-4 and NF-ĸB was decreased after treatment with MAP and a combination of MAP and LPS, and increased after treatment with LPS. Conclusion: MAP, which is a stable precursor of vitamin C, may be a good effective and alternative agent to improve inflammatory reaction in acne.

Draft guidelines for euthanasia and humane endpoints for zebrafish

Sang Wha Kim,Won Joon Jung,Seung Hee Han,Sun Kyeong Kim,Heui Jin Kim,Dong Jin Baek,Su Hee Lim,Ja Un Tae,Yirang Na,Seung Hyeok Seok 한국실험동물학회 2023 한국실험동물학회 학술발표대회 논문집 Vol.2023 No.2

Different antibody responses between liver and kidney transplant recipients elicited by third doses of COVID-19 mRNA vaccines

Lim So Yun,Yoon Young-In,Ji Yeun Kim,탁은영,권현욱,Sung Shin,Kim Young Hoon,Song Gi-Won,Kim Sung-Han,Lee Sung-Gyu 대한이식학회 2023 Korean Journal of Transplantation Vol.37 No.1

Background: Solid organ transplant recipients exhibit decreased antibody responses, mainly due to their weakened immune systems. However, data are limited on antibody responses after the primary series of coronavirus disease 2019 (COVID-19) vaccines among recipients of various solid organ transplant types. Thus, we compared the antibody responses after three COVID-19 vaccine doses between liver transplant (LT) and kidney transplant (KT) recipients. Methods: We prospectively enrolled solid organ transplant recipients who received three COVID-19 vaccine doses from June 2021 to February 2022 and measured S1-specific immunoglobulin G antibodies using an enzyme-linked immunosorbent assay. Results: Seventy-six LT and 17 KT recipients were included in the final analysis. KT recipients showed consistently lower antibody responses even after the third vaccine dose (86.2% vs. 52.9%, P=0.008) and lower antibody titers (median, 423.0 IU/mL [interquartile range, 99.6–2,057 IU/mL] vs. 19.7 IU/mL [interquartile range, 6.9–339.4 IU/mL]; P=0.006) than were observed in LT recipients. Mycophenolic acid was a significant risk factor for a seropositive antibody response after the third vaccine dose in the multivariable analysis (odds ratio, 0.06; 95% confidence interval, 0.00–0.39; P=0.02). Conclusions: We found a weaker antibody response despite the completion of the primary series of COVID-19 vaccines in KT recipients than in LT recipients. Mycophenolic acid use in KT recipients might be the main contributor to this observation.

Prediction of distant metastasis and survival in adenoid cystic carcinoma using quantitative ¹⁸F-FDG PET/CT measurements

Lim, Won Sub,Oh, Jungsu S.,Roh, Jong-Lyel,Kim, Jae Seung,Kim, Soo-Jong,Choi, Seung-Ho,Nam, Soon Yuhl,Kim, Sang Yoon Elsevier 2018 Oral oncology Vol.77 No.-

<P><B>Abstract</B></P> <P><B>Objectives</B></P> <P>Adenoid cystic carcinoma (AdCC) in the salivary gland shows a high rate of distant metastasis, which is related to the resulting poor prognosis. We therefore examined the role of pretreatment <SUP>18</SUP>F-FDG PET/CT for prediction of distant metastasis, recurrence/progression, and survival in AdCC.</P> <P><B>Methods</B></P> <P>This study included 52 patients who underwent pretreatment <SUP>18</SUP>F-FDG PET/CT scanning and subsequent treatments for AdCC. Maximum, mean, and peak standardized uptake value (SUV<SUB>max</SUB>, SUV<SUB>mean</SUB>, and SUV<SUB>peak</SUB>), metabolic tumor volume (MTV), and total lesion glycolysis (TLG) were measured on <SUP>18</SUP>F-FDG PET/CT. Univariate and multivariate Cox proportional hazards regression analyses were used to identify associations between the quantitative measurements of <SUP>18</SUP>F-FDG PET, and progression-free survival (PFS), distant metastasis-free survival (DMFS), and disease-specific survival (DSS).</P> <P><B>Results</B></P> <P>Distant metastases were found in 20 (39%) patients: 6 (12%) at initial diagnosis and 14 (27%) during the median follow-up of 72 months after treatment. Univariate analyses showed that all the <SUP>18</SUP>F-FDG PET parameters of SUV<SUB>max</SUB>, SUV<SUB>mean</SUB>, SUV<SUB>peak</SUB>, MTV, and TLG were significantly associated with overall PFS, DMFS, and OS (all <I>P</I> < .05). After controlling for clinicopathological variables, SUV<SUB>max</SUB> remained an independent factor predictive of PFS (<I>P</I> = .001), while MTV and TLG were independent predictors of DMFS (<I>P</I> = .009) and DSS (<I>P</I> = .017). Patients with MTV > 14.8 mL showed a 5.9-fold higher risk of distant metastasis and a 4.2-fold higher risk of disease-specific death than those with a lower MTV.</P> <P><B>Conclusions</B></P> <P>Quantitative measurements using <SUP>18</SUP>F-FDG PET/CT are useful for predicting tumor progression, distant metastasis, and survival in patients with AdCC.</P> <P><B>Highlights</B></P> <P> <UL> <LI> SUV<SUB>max</SUB>, SUV<SUB>mean</SUB>, SUV<SUB>peak</SUB>, MTV, and TLG were measured on pretreatment <SUP>18</SUP>F-FDG PET/CT of 52 adenoid cystic carcinoma patients. </LI> <LI> SUV<SUB>max</SUB> (>3.2) was an independent factor predictive of progression-free survival (<I>P</I> = .001). </LI> <LI> MTV and TLG were independent predictors of distant metastasis-free and disease-specific survival (<I>P</I> < .05) </LI> <LI> MTV > 14.8 mL or TLG > 45.5 g was associated with a >4-fold increased risk of distant metastasis and mortality. </LI> </UL> </P>

Micro-CT image-based reconstruction algorithm for multiscale modeling of Sheet Molding Compound (SMC) composites with experimental validation

Lim, Hyoung Jun,Choi, Hoil,Yoon, Sang-Jae,Lim, Sang Won,Choi, Chi-Hoon,Yun, Gun Jin Techno-Press 2021 Composite materials and engineering Vol.3 No.3

This paper presents a multiscale modeling method for sheet molding compound (SMC) composites through a novel bundle packing reconstruction algorithm based on a micro-CT (Computed Tomography) image processing. Due to the complex flow pattern during the compression molding process, the SMC composites show a spatially varying orientation and overlapping of fiber bundles. Therefore, significant inhomogeneity and anisotropy are commonly observed and pose a tremendous challenge to predicting SMC composites' properties. For high-fidelity modeling of the SMC composites, the statistical distributions for the fiber orientation and local volume fraction are characterized from micro-CT images of real SMC composites. After that, a novel bundle packing reconstruction algorithm for a high-fidelity SMC model is proposed by considering the statistical distributions. A method for evaluating specimen level's strength and stiffness is also proposed from a set of high-fidelity SMC models. Finally, the proposed multiscale modeling methodology is experimentally validated through a tensile test.

Sequestration of Roots-derived Carbon in Paddy Soil under Elevated CO2 with Two Temperature Regimes as Assessed by Isotope Technique

( Won Jin Baek ),( Young Joo Kim ),( Seok In Yun ),( Sun Il Lee ),( Sang Sun Lim ),( Han Yong Kim ),( Kwang Sik Yoon ),( Soo Myung Choi ),( Woo Jung Choi ) 한국응용생명화학회 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.3

Paddy soils are considered to have a great soil organic carbon (SOC) sequestration potential. The present study was conducted to estimate the amount of new C derived from rice-roots in a paddy soil under global warming with elevated CO2 concentration ([CO2]) using δ13C technique. Roots of rice grown with elevated [CO2] were significantly depleted in 13C by more than 6‰ compared to those with ambient [CO2], leading to a low δ13C of SOC via rhizodeposition of 13C-depleted C under elevated [CO2]. The net C storage derived from roots was estimated to be 0.25 and 0.31 kg m-2 under ambient and elevated air temperature (Tair) conditions, respectively. The greater roots-derived C under elevated Tair than that under ambient Tair collaborated with increased root biomass by elevated Tair. However, SOC balance analysis revealed that 0.16 and 0.21 kg m-2 of autochthonous SOCs were decomposed under ambient and elevated Tair, respectively, during the growth season. Therefore, elevated Tair may enhance incorporation of new C derived from roots to SOC pool due to increased belowground biomass, but warming may also increase decomposition of old SOC by stimulating temperature-sensitive microbial activities.