원발성 종격동 지방육종 -1예 보고 -

이성윤,홍은경,지행옥,Lee, Seong-Yun,Hong, Eun-Gyeong,Ji, Haeng-Ok 대한흉부심장혈관외과학회 1989 The Korean Journal of Thoracic and Cardiovascular Vol.22 No.6

A case of liposarcoma was reported in 52 year-old female. She had the operation history due to mediastinal lipoma at other Hospital before 26 months ago. Chest X-ray revealed a huge soft tissue mass- density at the entire right lung field, and left middle and lower lung field at admission. At the lateral film, the mass was located in the anterior and middle mediastinum. Transsternal bilateral thoracotomy was performed, followed by extirpation of liposarcoma, wedge resection of superior vena cava, angioplasty of superior vena cava, and then partial pericardiectomy. The post-operative treatment was 5500 rad irradiation. Post-operative course was uneventful, that was noticed by OPD follow-up for 10 months. Primary liposarcoma of the mediastinum is very rare tumor. This tumor grows to an enormous size, and symptoms are referable to compression of the contiguous intrathoracic structures. The treatment of choice is surgery in all cases. Such an approach serves to establish a tissue diagnosis, to relieve the patients* symptoms, and may results in a cure sometimes. Radiotherapy or/and chemotherapy seems to be ineffective, but should be further studied.

공간정보 분석을 통한 건축물의 설계풍속 산정

이성윤,조현재,이현기,최세휴,Lee, Seong-Yun,Jo, Hyun-Jae,Lee, Hyun-Ki,Choi, Se-Hyu 한국공간정보학회 2015 한국공간정보학회지 Vol.23 No.3

건축물이 일정규모 이상 높아지면 구조설계 시 바람의 영향이 중요한 요인으로 작용하게 된다. 우리나라는 지형적인 특성상 태풍과 같은 위험현상이 자주 발생하는 지역이므로 더욱 중요한 요인이라 할 수 있다. 이러한 시대적 흐름과 기상변화를 고려한다면 건축물의 합리적인 내풍설계의 필요성이 더욱 부각되고 있다. 본 연구에서는 1:5,000 수치지형도를 바탕으로 공간정보분석을 이용하여 설계풍하중 산정방법을 제시하였으며 실제 적용사례와 비교분석 하였다. 제안된 방법으로 풍속고도분포계수, 지형계수를 산정할 경우 보다 정량적, 객관적으로 설계풍속을 산정할 수 있었으며 기존의 방법과 비교했을 때 평가에 필요한 시간과 비용을 단축할 수 있을 것으로 기대되 건축물의 합리적이고 경제적인 내풍설계에 도움이 될 것으로 기대된다. Once the building is higher than certain size, the wind effect plays very important role in structure design. Moreover, this is more important in Korea because dangerous phenomena like typhoons are common. Rational wind resistant design is being magnified considering the global flow and climate changes. This research presented the estimation method of design wind load using spatial information analysis based on 1:5,000 digital map and performed comparative analysis with actual application cases. The wind velocity pressure exposure coefficient and topographic coefficient turned out to be more quantitative and rational when calculated through the proposed method. The time and cost are comparatively low when compared with traditional method which contribute to the economic and rational wind resistant design.

식도암의 임상적 고찰

이성윤,지행옥,Lee, Seong-Yun,Ji, Haeng-Ok 대한흉부심장혈관외과학회 1990 Journal of Chest Surgery (J Chest Surg) Vol.23 No.2

The records of 67 patients who had been operated as an esophageal cancer during the period from 1973 to 1989 at the Department of Thoracic and Cardiovascular Surgery, Hanyang University Hospital were reviewed retrospectively. The results were summarized as follows ; The age ranged from 28 years old to 80 years old. The highest incidence was 5th decades, then 6th decades, and the incidence of male was 10 times as the incidence of female[M:F= 10.16: 1]. The locations were lower esophagus 44%, middle esophagus 38.8%, upper esophagus 11.9% and cervical esophagus 4.4% The frequent symptoms were dysphagia [88%], epigastric or substernal pain and discomfort [29.8%], weight loss [20.8%], and laryngeal dryness [1.4%]. The most common interval between the onset of dysphagia and admission was 2-3 months; 82% of patients was within 6 months, The cancer consisted of stage I [3%], stage II [11.9%], stage III[47.6%], and stage IV [33.7%] The resectability of cancer was 67%. The organs of substitute were stomach in 21 cases, right colon 6 cases, and jejunum in 8 CRSCS. The relation between invasion of tumor and lymph node metastasis was analyzed: mucosal involvement: 1 case/2case, muscle invasion; 0/2 full thickness; 4/6, adjacent structure 7/12. Postoperative complications were pneumonia, pleural effusion, hoarseness, mediastinitis, anastomosis site leakage, reoperation due to stenosis, chylothorax, empyema, mechanical ileus, wound infection, meat impaction at anastomosis site, and repair of gastrostomy site leakage. Adjuvant therapies were irradiation [15cases], chemotherapy [14cases], and Bougie dilatation [4 cases],

지하 특성에 따른 비투멘 저류층 내 스팀전파효율성 비교 및 분석

이성윤(Seong Yun Lee),정진아(Jina Jeong),박은규(Eungyu Park) 대한지질학회 2013 대한지질학회 학술대회 Vol.2013 No.10

사육기간에 따른 신품종 및 상용토종닭의 육질특성 비교분석

이성윤(Seong-Yun Lee),박지영(Ji-Young Park),정사무엘(Samooel Jung),정종현(Jong-Hyun Jung),남기창(Ki-Chang Nam) 한국가금학회 2021 韓國家禽學會誌 Vol.48 No.4

본 연구는 Golden Seed Project에서 개발 중인 토종닭 후보라인과 상용토종닭인 한협 3호의 품질특성을 비교분석하여 후보라인들의 사육기간에 따른 이용가능성을 확인하기 위해 실시되었다. (주)하림 실험농장(전북 김제시)에서 5주, 12주간 동일한 조건에서 사육된 토종닭(CON: 한협 3호, CL1: 신품종 후보계통 C, CL2: 신품종 후보계통 D) 총 600수를 하림(익산) 도계장에서 생산품과 동일한 표준 조건에서 도계한 뒤 계통별 30수씩 임의 선발하였다. 전문 가공 종업원에 의해 생산품과 동일하게 발골하였고 실험에는 다리살 부위를 사용하였다. 사육기간동안 CON과 유사한 pH를 나타내었고 12주령에서는 가장 높은 pH 값을 나타내었다. 보수력에서는 전반적으로 처리구간 유의미한 차이는 확인 되지 않았으며, 5주령 계육에서 높은 보수력을 나타내었다. 지방산패도에서 CL1은 저장 7일차에 가장 높은 값을 보였고 DPPH 라디칼 소거능에서는 저장 7일에 대조구인 한협 3호는 5주령에서 신계통에 비해 높은 항산화력을 나타내었지만 12주령에서는 가장 낮은 항산화력을 나타냈다. 주요 지방산 조성은 올레산(C18:1), 팔미트산(16:0), 리놀레산(18:2), 스테아르산(18:0), 아라키돈산(20:4) 순으로 나타났으며 개별지방산에서 처리구간 특이적인 차이는 발견되지 않았다. 동맥경화지수(AI)와 혈전형성지수(TI)는 5주령 계육이 12주령에 비해 낮은 수치를 보였으며, 이와 반대로 P/S함량에서는 12주령 계육이 낮은 비율을 나타내었다. 항산화 펩타이드인 anserine 함량에서는 5주령 후보라인이 대조구에 비해 높은 함량을 나타내었고, 12주령 계육이 5주령 계육보다 높은 함량을 나타냈다. 기능성 화합물인 L-carnitine과 betaine의 함량에서는 12주령때 후보계통들이 한협에 비해 높은 함량을 나타내었다. 따라서 본 연구에서는 각 계통간의 차이보다는 주로 사육기간의 차이가 높은 유의성으로 나타났으며, 사육기간이 증가함에 따라 적색도, 불포화지방산 및 ribose 함량이 낮아지고, 포화지방산, AI, TI 및 anserine함량이 높아지는 것이 확인되었다. This study was conducted to determine the nutritional quality of two newly-developed native chicken strains, compared to the commercial Korean native chicken. A total of 600 chickens (CON: Hanhyup No. 3, CL1: candidate line C, CL2: candidate line D) raised under the same conditions were slaughtered at either 5 or 12 weeks. Leg meat was then obtained and analyzed for its physicochemical properties. The results showed that regardless of the growing period, there was no variation in proximate composition (P>0.05), except for crude protein, between strains. Water holding capacity did not differ between strains at either slaughter age; however, it was significantly lower in the 12-week group than in the 5-week group (P≤0.05). For both skin and muscle color, a* and b* values were lower at 12 weeks than at 5 weeks (P≤0.05). DPPH radical-scavenging activity tended to be lower at 12 weeks than at 5 weeks (P≤0.05). Furthermore, all chickens slaughtered at 5 weeks were found to have greater contents of linoleic acid (18:2) and polyunsaturated fatty acids (PUFA) and lower atherogenicity and thrombogenicity indices than those slaughtered at 12 weeks (P≤0.05). However, anserine, betaine, and glucose were more concentrated among the lines at 12 weeks than at 5 weeks (P≤0.05). In conclusion, the quality traits of native chickens were distinct by different production stages rather than chicken lines.

사용자의 활동과 영향력을 이용한 트위터의 URL 추천 시스템

이성윤(Seong-Yun Lee),이태휘(Taewhi Lee),김형주(Hyoung-Joo Kim) 한국정보과학회 2011 정보과학회 컴퓨팅의 실제 논문지 Vol.17 No.8

트위터는 최근 가장 각광 받는 마이크로블로깅 서비스로 전세계인들에게 정보 교류의 장으로 활용되고 있다. 그러나 사용자 수가 급증하고 있어 사용자들이 생산하는 막대한 양의 정보로부터 개인이 유용한 내용을 찾아내기가 어렵다. 이러한 문제를 해결하고자 트위터에서의 URL 추천 시스템이 등장하였으나 이전 연구들은 트위터의 특성을 고려하지 않는 단점을 지닌다. 본 논문에서는 사용자의 활동과 영향력을 고려하여 기존 시스템을 개선한다. 추천 결과를 향상시키는 요인들을 탐구하고 사용자 활동과 영향력을 측정하는 방법을 고안한다. 이를 기존 시스템에 결합한 새로운 URL 추천 시스템을 제안하고, 실험을 통해 실제로 사용자의 만족도가 높아짐을 확인한다. Twitter is one of the most attractive microblogging services and has been used as information net-work by people worldwide. But since the number of users is increasing rapidly, it is hard for each individual user to find useful contents from the huge amount of information generated by the users. To solve this problem, URL link recommendation system for Twitter has been proposed, but no previous work has considered the characteristics of Twitter itself. In this paper, we improve the existing system by considering user activity and user influence. We explore factors that improve the quality of recommendations and design methods to measure user activity and influence. We propose a novel URL recommendation system that combines these factors with the existing system. The experiments show that our system increases user satisfaction.

광 응답형 스마트 고분자 소재

유종수 ( Jong Su Yu ),이성윤 ( Seong Yun Lee ),나희영 ( Hee Yeong Na ),안태정 ( Tae Jung Ahn ),김현경 ( Hyun Kyoung Kim ) 한국고무학회 2012 엘라스토머 및 콤포지트 Vol.47 No.4

최근 들어 광, 온도, pH, 전기, 자성, 압력 등과 같은 외부 환경의 작은 변화에도 반응하여 모양/부피가 변하거나 기계적, 광학적, 전기적, 화학적 특성 등이 가역적으로 바뀌는 스마트 소재에 대한 관심이 높아지고 있다. 이러한 스마트 소재들 중 광조사에 의해 소재의 다양한 특성을 가역적으로 제어할 수 있는 광응답 스마트 소재가 많은 관심을 받고 있다. 본 논문에서는 광에너지를 받아 기계적 에너지로 바로 전환되어 인공근육, 모터 등과 같은 액츄에이터 기능을 할 수 있는 광구동형 스마트 고분자 소재들에 대해 소개하고자 한다. 특히, 광구동형 스마트 고분자 소재중에서도 마이크로와 매크로 스케일 변형이 가능한 아조벤젠을 함유한 비결정성 고분자, 액정 고분자, 자기 조립형 초분자에 대한 다양한 연구들에 대해 설명하고자 한다. Control of shape/volume, mechanical, optical, electrical, and chemical switching of materials by external stimuli such as light, temperature, pH, electric field, and pressure has attracted great attention. Among these materials, photo-responsive materials containing photochromic compounds such as azobenzene, spiropyran, and cinnamic acid groups have been the subject of intense interest in recent years. In this review, we describe the recent progress in the area of azobenzene containing polymer materials that can convert light energy into mechanical energy directly. Especially we focus our attention on light-driven actuators such as artificial muscle, motor, and valve. We summarize the photomechanical effects in liquid crystal elastomer, amorphous polymer, monolayer, and supramolecules containing azobenzene, respectively.

이온성 액체를 이용한 dodecanethiol로 안정화된 금속 나노입자 합성

이영은 ( Young Eun Lee ),이성윤 ( Seong Yun Lee ),유성식 ( Seong Sik You ) 한국화학공학회 2012 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.50 No.5

Nanoparticles have received significant attention because of their unusual characteristics including high surface area to volume ratios, Thiol ligand have been used as stabilizers of metal nanoparticles since Brust et al. They reported the preparation method of ligand capped metal nanoparticles by protecting the nanoparticles with a self-assembled monolayer of dodecanethiolate. In this method, volatile organic compounds (VOCs) were used as sovents. This study was carried out to replace these VOCs with room temperature ionic liquids (RTILs). We used two type of ILs to prepare metal nanoparticles. One is a hydrophobic IL, [BMIM][[PF6] (1-Butyl-3-methylimidazolium hexafluorophosphate) purchased from IL maker, C-Tri from Korea and the other one is a hydrophilic one, [BMIM][Cl] (1-Buthy-3- methylimdazolium chloride) sinthesized by us. In the case of preparing Ag and Au nanoparticles using [BMIM][Cl], we didn`t use phase transition reagents and ethanol because it has hydrophilic property and preparing Au, Ag nanoparticles using [BMIM][[PF6] the method is as same as Brust et al.`s except using [BMIM][[PF6] instead of organic solvent because it has hydrophobic property. FT-IR and UV-vis, TEM, TGA analysis have been used in an attempt to determine the particle size and verify functional groups. The particle size obtained from TEM was very similar to those obtained by Brust et al. This is a clear example of ligand capped metal nanoparticles prepared using ionic liquids. And the experimental result demonstrated ionic liquids can act as a highly effective medium for the preparation and stabilization of gold and silver metal nanoparticles.

IoT를 이용한 가정용 에어컨 및 공기청정기 제어

김정욱(Kim Jeong Uk),박찬섭(Park Chan Seob),윤주현(Youn Ju Hyeon),이성윤(Lee Seong Yun),황재현(Hwang Jae Hyun) 한국정보과학회 2018 한국정보과학회 학술발표논문집 Vol.2018 No.12

가벼운 사슬 골수종과 동반된 심장막 아밀로이드증

장재호 ( Je Ho Chang ),장선희 ( Sun Hee Chang ),허진원 ( Jin Won Huh ),이성윤 ( Sung Yun Lee ),김정아 ( Jung A Kim ),윤성민 ( Seong Min Yoon ),이혜란 ( Hye Ran Lee ) 대한내과학회 2013 대한내과학회지 Vol.84 No.5

Amyloidosis is characterized by the deposition of amyloid fibrils, which cause both functional and structural damage to organs. Cardiac involvement with amyloids is a common cause of secondary cardiomyopathy and leads to congestive heart failure. Pericardial amyloidosis usually occurs at the late or terminal stage of the disease after myocardial involvement, but it is extremely rare for pericardial amyloidosis to proceed with myocardial involvement. Here, we report a rare case of a 66-year-old patient with light-chain myeloma, who presented with pericardial effusion but no evidence of cardiomyopathy. (Korean J Med 2013; 84:755-758)