Impact of Energy and Access Methods on Extrahepatic Tumor Spreading and the Ablation Zone: An Ex vivo Experiment Using a Subcapsular Tumor Model

김진실,Youngsun Ko,Hyeyoung Kwon,김민정,이정경 대한영상의학회 2019 Korean Journal of Radiology Vol.20 No.4

Objective: To evaluate the impact of energy and access methods on extrahepatic tumor spreading and the ablation zone in an ex vivo subcapsular tumor mimic model with a risk of extrahepatic tumor spreading. Materials and Methods: Forty-two tumor-mimics were created in bovine liver blocks by injecting a mixture of iodine contrast material just below the liver capsule. Radiofrequency (RF) ablations were performed using an electrode placed parallel or perpendicular to hepatic surface through the tumor mimic with low- and high-power protocols (groups 1 and 2, respectively). Computed tomography (CT) scans were performed before and after ablation. The presence of contrast leak on the hepatic surface on CT, size of ablation zone, and timing of the first roll-off and popping sound were compared between the groups. Results: With parallel access, one contrast leak in group 1 (1/10, 10%) and nine in group 2 (9/10, 90%) (p < 0.001) were identified on post-ablation CT. With perpendicular access, six contrast leaks were identified in each group (6/11, 54.5%). The first roll-off and popping sound were significantly delayed in group 1 irrespective of the access method (p = 0.002). No statistical difference in the size of the ablation zone of the liver specimen was observed between the two groups (p = 0.247). Conclusion: Low-power RF ablation with parallel access is proposed to be effective and safe from extrahepatic tumor spreading in RF ablation of a solid hepatic tumor in the subcapsular location. Perpendicular placement of an electrode to the capsule is associated with a risk of extrahepatic tumor spreading regardless of the power applied.

EPS를 이용한 차량 횡방향 안정성 향상

고상진(Sangjin Ko),이현철(Hyuncheol Lee),민승기(Seunggi Min),유영선(Youngsun Yoo) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11

In this paper, control algorithms of electric power steering (EPS) system is investigated to improve vehicle lateral stability. EPS system has been growing rapidly and then enables to apply variable additional functions as well as steering torque assist – basic EPS function. Commonly used lateral stability control method is based on brake control. Integrated chassis control system between EPS and ESC (brake control) is well known system for lateral stability control. The proposed control algorithms is dependent on only EPS system. The control algorithm enables to help and a driver control more safely by adjusting driver steering torque. The control algorithms consist of two parts. The one is vehicle state detection algorithm and the other is to generate additional EPS output torque to adjust driver steering torque. The proposed algorithms are expected to improve lateral stability of small car without active brake control system and can be also helpful trailer hitched vehicle by preventing more severe handling by a driver. The test results showed that driver steering torque is adjusted appropriately in severe situations and a driver controls a vehicle more safely by the proposed algorithms.

아웃도어웨어 제품편익이 브랜드 신뢰와 브랜드 충성도에 미치는 영향

고순화 ( Soonhwa Ko ),이영선 ( Youngsun Rhee ) 한국디자인트렌드학회 2017 한국디자인포럼 Vol.54 No.-

연구배경 아웃도어웨어 브랜드간 경쟁이 치열해 지면서 패션업계에서는 한계에 다다랐다는 인식과 함께 소비자들이 외면하기 전에 진정으로 바뀌어야 할 중요한 시점임을 인식하고 있다. 본 연구는 브랜드 아이덴티티 형성에 중요한 요인인 제품편익을 중심으로 아웃도어웨어 브랜드 신뢰, 브랜드 충성도와의 관계를 밝힘으로서 아웃도어웨어 브랜드 자산 형성과정의 이해를 돕고자 하였다. 연구방법 20-50대 소비자를 대상으로 온라인과 오프라인에서 설문 조사하였다. 총 435부가 분석되었으며 SPSS 21 프로그램을 사용하여 빈도분석, 신뢰도분석, 탐색적 요인분석, 회귀분석을 실행하였다. 연구결과 아웃도어웨어 브랜드 신뢰에 가장 큰 영향을 미치는 제품편익은 기능적 편익으로 나타났으며, 브랜드 신뢰가 브랜드 충성도에 미치는 영향은 브랜드 전문성보다 브랜드 호의성이 더 큰 영향을 미치는 것으로 나타났다 또한 아웃도어 제품편익이 브랜드 신뢰에 미치는 영향은 성별/연령대별로 다르게 나타났다. 결론 본 연구를 통해 브랜드의 성장에 있어 일관된 브랜드 정체성을 유지하기 위한 효과적인 전략 방향을 설정하는데 시사점을 얻을 수 있을 것이다. 또한 기업에서 향후 제품개발 및 브랜드 확장과 같은 브랜드의 성장에 있어 세분시장별로 가장 효과적인 마케팅 전략을 개발하는데 활용할 수 있을 것이다. Background As the competition between outdoor brands becomes fierce, it is recognized that fashion industry is reaching its limit and it is an important point that consumers should change before they turn away. .The purpose of this study is to understand the process of outdoor wear brand equity by explaining the relationship between brand trust, and brand loyalty of outdoorsware, focusing on product benefits, which is an important factor in brand identity formation. Methods This study was conducted online and offline questionnaire for university students and 20-50s. A total of 435 questionnaires were analyzed. The data analysis was performed by frequency analysis, reliability analysis, exploratory factor analysis, and regression analysis using SPSS 20.0. Result Product benefits that have the greatest impact on outdoor brand trust are functional benefits. Brand benevolence in brand trust has a greater effect on brand loyalty than brand expertise. In addition, the effect of outdoor product benefits on brand trust were different for each gender and age group. Conclusion This study reveals the product benefits that play a major role in forming brand loyalty through brand trust. Therefore, companies can gain some implications for establishing an effective strategic direction to maintain a consistent brand identity in brand growth. In addition, companies will be able to utilize these result to develop the most effective marketing strategies for each segment market in the future growth of brands such as product development and brand extension.

Metabolic Association of Lipophilic Pigments During Germination of Soybean Sprouts

Gi-Ppeum Kim,Youngsun Hwang,Kyung-Geun Ahn,Gyeong-Ha Kim,Min-Ji Kim,Ryeon-Woong Kang,Jong-Min Ko,Sun Tae Kim,Won Byong Yoon,Myoung-Gun Choung 한국식품영양과학회 2014 한국식품영양과학회 학술대회발표집 Vol.2014 No.10

중국소비자의 쇼핑성향이 브라우징과 구매행동에 미치는 영향

려언예 ( Yan-ni Lu ),고순화 ( Soonhwa Ko ),이영선 ( Youngsun Rhee ) 한국디자인트렌드학회 2017 한국디자인포럼 Vol.56 No.-

연구배경 최근 중국에서는 인터넷 쇼핑이 대중화 되고 거래시장도 점점 큰 비중을 차지하게 되어 멀티채널 전략이 중요해지고 있다. 본 연구는 중국 소비자들의 쇼핑성향에 따라 온라인과 오프라인 브라우징 행동이 어떻게 이루어지고 있는지, 이러한 브라우징 행동이 구매행동에 어떠한 영향을 미치고 있는지 알아보았다. 연구방법 설문지를 이용하여 중국 대련에 거주하고 있는 10대 후반부터 30대까지의 소비자들을 대상으로 자료를 수집하였으며 총 376부의 설문지가 분석에 사용되었다. SPSS 18.0을 이용해 기술적 통계분석, 요인분석을 하였으며 AMOS 18.0을 이용해 경로분석을 수행하였다. 연구결과 중국 소비자들의 의류제품 쇼핑성향을 분석한 결과 쾌락적, 편의적, 경제적, 효율적 쇼핑성향의 4개 요인이 도출되었다. 쇼핑성향의 차원은 온라인과 오프라인 브라우징에 부분적으로 유의한 영향을 미치는 것으로 나타났는데, 쾌락적 쇼핑성향은 온라인과 오프라인 브라우징에 가장 큰 영향을 미치고 있었다. 또한 온라인과 오프라인 브라우징 모두 구매금액비율과 충동구매에 유의한 영향을 미치는 것으로 나타났다. 결론 쇼핑성향과 온·오프라인 브라우징, 구매금액비율, 충동구매 사이에 유의한 인과적 관계가 있었고, 온라인과 오프라인 브라우징은 구매행동에 영향을 미치는 중요한 변수임을 확인하였다. Background Recently, China has seen a sharp increase in online shopping with the growing presence of the internet. Moreover, consumers make their decisions based not only on either online or offline shopping, but rather on the combination of both. This study aimed to find the relationships among shopping orientation, browsing, and purchasing behavior in both online and offline markets. Methods The survey was conducted among 376 male and female consumers from late 10s to late 30s who lived in Dalian, China. The data was analyzed by factor analysis and path analysis using AMOS of SPSS18.0. Result As a result of analyzing the clothing shopping orientation of Chinese consumers, four factors were extracted: hedonic, convenient, economical and efficient shopping orientation. Three factors of shopping orientation had significant influences on online and offline browsing and hedonic shopping orientation was the most influential factor. Both online and offline browsing had significant influences on impulse buying and the ratio of expenditure on clothing in online vs. offline markets. Conclusion There were causal relationships among shopping orientation, online and offline browsing, impulse buying, and the ratio of online vs. offline expenditure on clothing. It was identified that online and offline browsing were the important variables in purchasing behavior.

OECD in vitro 검색시험법 활용을 통한 동물용의약품에서의 에스트로겐 활성평가

이희석(Hee-seok Lee),송영선(YoungSun Song),정다운(Da-Woon Jung),김나연(Na-Yeon Kim),고은이(Eun-Yi Ko),오현숙(Hyun-Suk Oh),황명실(Myung-Sil Hwang),문귀임(Guiim Moon),구용의(YongEui Koo) 환경독성보건학회 2017 한국독성학회 심포지움 및 학술발표회 Vol.2017 No.10

Sudden LOA 를 방지하기 위한 MDPS의 토크 센서 Fault-Tolerant 제어

홍승규(Seunggyu Hong),고상진(Sangjin Ko),유영선(Youngsun Yoo) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11

Late Onset Nephrogenic Systemic Fibrosis in a Patient with Stage 3 Chronic Kidney Disease: a Case Report

Lim Yu Jeong,Bang Jisun,Ko Youngsun,Seo Hyun-Min,Jung Woon Yong,Yi Joo Hark,Han Sang-Woong,유미연 대한의학회 2020 Journal of Korean medical science Vol.35 No.35

Nephrogenic systemic fibrosis (NSF) is a progressive systemic fibrosing disease that may occur after gadolinium contrast exposure. It can lead to severe complications and even death. NSF is highly prevalent among patients with advanced chronic kidney disease (CKD). In this report, however, we describe the case of a patient with NSF that occurred during early CKD. A 65-year-old man with stage 3a CKD was transferred to our hospital because of lower extremity edema. The medical history revealed that he was exposed to gadolinium 185 days earlier, and the result of his tibial skin biopsy was consistent with NSF. The patient underwent a combined therapy with ultraviolet-A1 phototherapy and methotrexate and steroid therapy for 6 months. The combined therapy stopped the systemic progression of NSF.

중국 소비자의 한국 패션브랜드에 대한 친숙성이 만족과 브랜드 충성도에 미치는 영향

유박 ( Bo Liu ),고순화 ( Soonhwa Ko ),이영선 ( Youngsun Rhee ) 한국의류학회 2016 한국의류학회지 Vol.40 No.4

Companies have recently become interested in the importance of long-term relationships with customers because business-based marketing ideas of the past have evolved into long-term relationship-based marketing. Establishing a relationship with customers to a company is not a simple method to form a market of consumers and provider; it is now understood as an important factor directly connected to the survival of a company. This study is to help Korean fashion brands in China build an efficient strategy for sales promotion and loyal customers through the analysis of the effect of familiarity with Korean fashion brands on satisfaction and brand loyalty in a rapidly growing Chinese fashion market. An online questionnaire covering Korean fashion brands in China was completed by 377 Chinese male and female customers aged 20 to 39 years old from March 20 to March 27, 2014. Data analysis was performed by factor analysis and path analysis using SPSS 20.0 and AMOS. Both direct experiences and indirect experiences influenced brand familiarity. It showed that brand familiarity had a significant direct effect and an indirect effect through satisfaction on brand loyalty. A competitive advantage in the present Chinese fashion market requires that loyalty builds and that brand loyalty increases by creating a long-term relationship with customers when familiarity about the brand is induced.

다자간 멀티미디어 회의 운용 관리 시스템 (Conferlink)

윤자천(Jacheon Yoon),이윤호(Yunho Lee),고기원(Kiwon Ko),김영선(Youngsun Kim) 한국통신학회 1998 한국통신학회 학술대회 및 강연회 Vol.1998 No.12