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이성희,고영배,이종원,정해철,박재현,이옥성,Lee, Sung-Hee,Ko, Young-Bae,Lee, Jong-Won,Jung, Hae-Chul,Park, Jae-Hyun,Lee, Ok-Sung 한국금형공학회 2012 한국금형공학회지 Vol.6 No.2
A multi-cavity injection mold system of protein chip for point-of-care with cavity temperature and pressure sensors was proposed in this work. In advance of manufacturing for the multi-cavity injection mold system, a single cavity injection mold system to mold protein chip was considered. Injection molding analysis for the presented system was performed to optimize the process of the molding and suggest guides to design. On the basis of the results for the single cavity system, a multi-cavity injection mold system for protein chip was analyzed, designed and manufactured with cavity temperature and pressure sensors. Results of balanced filling for protein chip models were obtained from the presented mold system.
소아의 단순성 비만증에 의한 지방간의 진단: ALT치와 복부 전산화단층촬영 및 간생검 소견간의 상관관계
이성희,김화중,오재철,한혜정,김희섭,차한,박호진,신미경,이민진,이상천,Lee, Seong-Hee,Kim, Hwa-Jung,Oh, Jae-Cheol,Han, Hae-Jeong,Kim, Hee-Sup,Tchah, Hann,Park, Ho-Jin,Shin, Mi-Keong,Lee, Min-Jin,Lee, Sang-Chun 대한소아소화기영양학회 1999 Pediatric gastroenterology, hepatology & nutrition Vol.2 No.2
목 적: 소아비만의 중요한 합병증 중 하나인 지방간을 진단함에 있어 ALT치와 CT 및 간생검 소견간의 상관관계를 살펴봄으로써, 선별검사로서 ALT치의 유용성과 확진검사로서 CT 및 간생검의 필요성을 알아보고자 한다. 대상 및 방법: 1990년 3월부터 1997년 12월까지 서울적십자병원 소아과에 내원하여 단순비만으로 진단 받은 78명 중 지방간 진단을 위해 CT를 실시한 26명을 대상으로 하였으며, 생화학검사 중 지방간의 선별검사로서 보다 특이성이 높은 ALT치가 지나치게 높거나 비만도가 심한 비만아들 중 15례에서 간생검을 실시하였다. 이들을 ALT치에 따라 3개 군으로 분류하고 각 군별로 신체계측지수, CT 및 간생검상 지방침착도 간의 상관관계를 비교 분석하였다. 결 과: 1) ALT치와 신체계측지수간의 상관관계: 대상 비만아 26례 중 ALT치는 17례(63.4%)에서 이상 상승(>30 IU/L)되었으나, ALT치의 상승과 신체계측지수들(비만도, RI, BMI, 체지방률) 간에는 유의한 상관관계가 없었다(p>0.05) 2) CT상 지방침착도와 ALT치 및 신체계측지수 간의 상관관계: 26례 중 13례(50%)에서 CT상 정상이었고, 나머지 13례는 정도의 차이는 있으나 모두 간음영이 증가된 지방간 소견을 보였다. CT상 지방간의 정도와 ALT치의 상승간에는 유의한 상관관계가 있었으나(p=0.01), 신체계측지수와는 유의한 상관관계가 없었다(p>0.05). 3) 간 생검상 지방간의 정도와 비만도, ALT치와의 상관관계: 26례 중 15례에서 간 생검을 실시한 결과, 1례에서 정상이었고 나머지 14례에서 모두 지방간 소견을 보였다. 그러나 간 생검상 정상인 1례는 고도비만이었으나 ALT치는 정상치였고, 중등도의 지방간 소견 보인 3례 중 1례는 고도비만이었음에도 ALT치는 정상이었으며 2례는 ALT치가 정상이거나 약간 증가하였으며, 심한 지방간 소견 보인 9례 중 1례는 경한 비만이었으나 ALT는 158 IU/L로 심한 상승을 보였다. 간 생검상 지방간인 14례를 지방침착도에 따라 3개 군으로 분류하여 비만도와 ALT치를 비교분석한 결과 비만도와 간 생검 소견간에는 유의한 차이가 없었으나(p>0.05), ALT치와 간 생검상 지방간의 정도간에는 유의한 차이가 있었다(p=0.01). 4) CT와 간 생검 소견간의 상관관계: 26례 중 15례에서 CT와 간 생검 모두를 시행한 결과, CT상 6례는 정상이었고, CT상 지방간 소견 보인 9례에서는 간의 지방침착도에 따른 음영의 변화를 기준으로 한 CT소견과 간 생검상 지방침착도간에 유의한 상관관계를 보였다(r=0.6094). 결 론: 최근 소아비만이 급증 추세에 있고 그에 따른 여러 가지 합병증들은 물론 성인비만으로 이행될 수 있으므로 학교보건 등을 통해 경각심을 높이도록 해야 하며, 특히 비만에 따른 지방간을 진단하기 위한 선별검사인 ALT치 등 생화학적인 간 기능 검사로는 간 손상 정도를 평가할 수 없기 때문에 보다 저비용이며 비침습적인 초음파검사를 적극 활용토록 하고 선별검사 등으로 선정된 고위험군에 대해서는 간 생검을 통해 간 손상 정도를 정확히 평가하고 지속적으로 추적 관리해야 할 것이다. Purpose: The purpose of our study is to provide useful information for diagnostic methods of fatty liver by childhood simple obesity and to provide correlation between serum alanine aminotransferase (ALT) for screening test and abdominal computerized tomography (CT) and liver biopsy for confirmative diagnostic methods of fatty liver. Methods: Among 78 obese childrens who visited our hospital, CT was carried out in 26 childrens. Of these, liver biopsy was carried out in 15 childrens who had high obesity index or severe elevated ALT. Based on the level of serum ALT, 26 cases were classified into 3 groups, and compared with physical measurements and degree of fatty infiltration on CT and liver biopsy. Results: 1) Correlation between ALT and physical measurements: Of 26 obese children, ALT was abnormally elevated (>30 IU/L) in 17 cases (67.4%) but there was no significant correlation between ALT and physical measurements (p>0.05). 2) Correlation between degree of fatty infiltration on CT and ALT: Of 26 cases, 13 cases (50%) revealed fatty liver on CT. The degree of fatty liver on CT had significant correlation with elevation of ALT (p<0.05). 3) Correlation between the degree of fatty infiltration on liver biopsy and ALT: Liver biopsy was performed in 15 cases of which 14 cases revealed fatty liver. But one case had normal hepatic histology with severe obesity and normal ALT. Fourteen fatty liver cases on liver biopsy were classified into 3 groups by the degree of fatty infiltration and analysed with obesity index and ALT. The histologic hepatic steatosis had no significant correlation with obesity index (p>0.05), but significant correlation with ALT (p<0.05). 4) Correlation between CT and liver biopsy finding: Both CT and liver biopsy were performed in 15 cases of which 6 cases revealed normal finding on CT and 9 cases manifested fatty liver. There was significant correlation between CT and liver biopsy findings (r=0.6094). Conclusion: The results of our study suggest that abdominal CT and liver biopsy are useful and accurate methods of estimating fatty liver in the childhood obesity. But biochemical abnormalities of routine liver function tests dot not correlate well with severity of the fatty liver and liver injury.
이성희,고영배,이종원,김성규,양진석,허영무,Lee, Sung-Hee,Ko, Young-Bae,Lee, Jong-Won,Kim, Sung-Kyu,Yang, Jin-Suk,Heo, Young-Moo 한국금형공학회 2008 한국금형공학회지 Vol.2 No.5
A micro-injection mold for ultra-thin-walled plate was considered in this work. The proposed mold system is for the fabrication of ultra-thin walled plastic plate with micro features by injection molding. As the injection molding of thin-walled plastic, which has the thickness under $400{\mu}m$, itself is not easy, the injection molding of the micro-features in the thin-walled structure is more complicated and difficult. To investigate the basic phenomenon of the ultra-thin walled part during the injection molding process, design of the part and mold system were performed in the present study. The injection molding and structural analysis of the suggested part and mold system were also performed. Consequently, injection molding system for ultra-thin walled plate with micro features were manufactured and presented.
현대문학 : 이청준의 「매잡이」연구 -랜서의 시점이론을 중심으로
이성희 ( Sung Hee Lee ) 문창어문학회 1999 문창어문논집 Vol.36 No.-
The purpose of this subject is to prove Lee tried to describe that the point of view concerns not only how to express, based on Lancer`s theory, but also how the author illustrates his theme. Lancer`s theory explains that the point of view, although it is a matter of expression, is influenced by author`s ideology. In 「Hawker」, the hero Tae-joon Min incarnates Lee`s ideology, formulating the main stream. Lee`s intention to stay away from readers is ultimately premised on his own authorization. This is why I selected 「Hawker」 to clarify Lee`s authorization and the conclusion is as follows. Lancer`s theory implies the structure of narrative, point of view and the authorization are on the same boat. I studied how the implication reflects the authorization through the structure-point analysis.
접합압연공정에 의해 제조된 AA1050/Mg(AZ91)/AA1050 복합판재의 미세조직 및 기계적 특성
이성희,유효상,임차용,Lee, Seong-Hee,You, Hyo-Sang,Lim, Cha-Yong 한국재료학회 2016 한국재료학회지 Vol.26 No.3
A roll-bonding process was applied to fabricate an AA1050/AZ91/AA1050 laminate complex sheet. Two AA1050 and one AZ91 magnesium sheets of 2 mm thickness, 30 mm width and 200 mm length were stacked up after surface treatment that included degreasing and wire brushing; material was then reduced to a thickness of 3 mm by one-pass cold rolling. The laminate sheet bonded by the rolling was further reduced to 2 mm in thickness by conventional rolling. The rolling was performed at 623K without lubricant using a 2-high mill with a roll diameter of 210 mm. The rolling speed was 15.9 m/min. The AA1050/AZ91/AA1050 laminate complex sheet fabricated by roll bonding was then annealed at 373~573K for 0.5h. The microstructure of the complex sheets was revealed by electron back scatter diffraction (EBSD) measurement; the mechanical properties were investigated by tensile testing and hardness testing. The strength of the complex sheet was found to increase by 11 % and the tensile elongation decreased by 7%, compared to those values of the starting material. In addition, the hardness of the AZ91 Mg region was slightly higher than those of the AA1050 regions. Both AA1050 and AZ91 showed a typical deformation structure in which the grains were elongated in the rolling direction; however, the mis-orientation distribution of grain boundaries varied greatly between the two materials.
조립각형 CFT 기둥의 용접크기 결정을 위한 수압실험 및 해석
이성희,김선희,김영호,최성모,Lee, Seong-Hui,Kim, Sun Hee,Kim, Young Ho,Choi, Sung Mo 한국강구조학회 2009 韓國鋼構造學會 論文集 Vol.21 No.5
콘크리트 충전강관에 사용되는 강관의 제작법은 재단된 4장의 플레이트를 모서리에서 용접하는 일반강관 제작법과, ㄷ형으로 절곡성형과정을 거쳐 2-Seam으로 용접하는 제작방법, 그리고 원형강관을 압축하여 4각형태로 만드는 방법등이 일반적으로 사용되며, 강관제작에 사용되는 용접방법과 용접량의 선택은 강관 제작비용에 큰 부분을 차지하고 있다. 새로운 제작형식으로 개발된 각형강관은 4장의 플레이트를 ㄱ형으로 절곡성형한 후 강관 폭의 중앙에서 4-Seam Flare 용접하는 방식이다. 본 연구에서는 새로운 제작형식의 CFT 각형 기둥에 대하여 용접량 평가를 위한 실험방법을 제시하고, 강관 제작법, 강관두께 및 용접량을 변수로 총 6개의 실험체를 제작하여 구조실험 및 해석을 수행하여 강관내부의 수압에 따른 강관의 거동을 평가하였다. There are three main production processes in the manufacture of concrete-filled square steel columns. The first process is known as the 'box-type process' or 'four-seam method,' wherein four beams are welded together at the seams. The second is the 'cold-forming process' or 'two-seam method,' wherein the seams of two channel beams are welded together. The third is the 'pressing process' or 'one-seam method,' wherein a circular column is pressed until it becomes a square column. In calculating the production cost for the making of a steel tube, it is very important to consider the welding process to be used and the desiredthickness of the steel tube, such as a square column that was developed under a new method, formed through the four-seam flare welding method at the center of the steel column width, following the L-shape formation. Certain tests were suggested in this study to evaluate the welding amount of concrete-filled square steel columns. With the parameters of the production method of a square steel column, the thickness of the steel square columns, and the welding amount, six specimens were produced. A structural test and finite-element analysis were conducted to assess the behavior of the steel column according to the water pressure inside the steel columns.
다공성 임플란트 제조를 위한 3D 프린팅 응용 금형기술
이성희,김미애,윤언경,이원식,Lee, Sung-Hee,Kim, Mi-Ae,Yun, Eon-Gyeong,Lee, Won-Sik 한국금형공학회 2017 한국금형공학회지 Vol.11 No.1
In this study, the mold technology for manufacturing of porous implant was investigated. Firstly, we considered the concept of insert molding technology with 3D printing of porous inert part. The part on implant was designed in the end region of the implant. And then main implant bodies were manufactured using conventional machining method. The other porous parts were designed and optimized with molding simulation. As the feature size of porous implant was so small that perfect feature of it using 3D printing technology could not be obtained. So, we proposed another scheme for manufacturing of the porous implant in the replace of the former approach. Polymer mold cores with 3D printing technology were considered. The effects of addictive manufacturing process parameters on the properties of mechanical and dimensional accuracy were investigated. Direct 3D printed polymer mold cores were designed and manufactured under the simulation of thermal and molding analysis. It was shown that 3D printed mold core with polymer could be adapted to the injection molding for porous implant.
블로그 게시물에 나타난 수도권 보전지역 및 자연자원의 분포 및 특성
이성희,손용훈,Lee, Sung-Hee,Son, Yong-Hoon 한국조경학회 2022 韓國造景學會誌 Vol.50 No.5
This study aimed to evaluate the awareness of conservation areas and green resources and analyze their characteristics by utilizing accumulated blog data created for specific places and objects. Among all the conservation areas and resources located in the Seoul metropolitan area, places that can be evaluated were classified, and sites were evaluated by dividing them into ten categories based on the number of blog posts written. As a result of the study, the users' awareness of forests was the highest, and the awareness of conservation areas and green resources was higher in urban areas than suburban areas. The result shows that the conservation areas and green resources located around the metropolitan area serve as natural tourist destinations while being the object of conservation for users. In addition, these results are in the same vein as the research results in domestic and foreign studies on the importance of ecosystem services in urban areas. Unlike existing research methods, this study is meaningful in that it identified the level of user awareness through social media analysis and applied it to evaluating conservation areas and green resources. It can be used as basic data to prepare a management plan considering public interest and awareness or to establish a development plan to increase awareness. In addition, the cumulative amount of blog content used in the study is meaningful in that it can identify and monitor users' interest in the space. However, it was not possible to examine the contents of each blog in detail because it was evaluated based on the amount of social media content. In addition, in the case of conservation areas and green resources, it is necessary to review and supplement the evaluation contents by adding keyword analysis and content analysis for the site to be evaluated as content other than the pure viewpoint of users may be mixed with development issues.
대형 후육 LH형 탄성구조 프레임의 사출성형 최적화에 관한 연구
이성희,Lee, Sung-Hee 한국금형공학회 2022 한국금형공학회지 Vol.16 No.1
In the present study, the injection molding optimization of a large thick LH type elastic frames for the reduction of warpage was performed. Two kinds of fine and coarse finite element models were prepared to investigate the efficiency of analysis time and quality on simulation results. In order to derive injection molding conditions that can minimize distortion of parts, it was investigated that the effects of mold temperature, resin temperature, injection time, hold pressure switching time, holding pressure and the hold time on deformation characteristics using the design of experiments. The main influential factors on the warpage were found from the optimization simulation and the geometry data of the warpage result was converted into an initial model for injection simulation. It was shown that a coarse model with good mesh quality could be adapted for mold design since the total analysis time using the proposed model was reduced to 1/10. The suggested inversed warpage model produced the best minimized result of warpage.
이성희,김정곤,Lee, Sung-Hee,Kim, Jong-Kon 한국토지주택공사 토지주택연구원 2015 LHI journal of land, housing, and urban affairs Vol.6 No.4
본 연구는 기후변화에 적응하기 위한 도시계획 측면의 계획기법을 도출하고 전략을 제시하는 것을 목적으로 한다. 이를 위해 본 연구는 다음과 같은 4단계에 걸쳐 연구를 진행하였다; 첫째, 기후변화 적응과 관련된 선행연구를 통하여 이론상에서 제시되고 있는 계획목표와 계획기법을 도출하였다. 둘째, 기후변화 적응을 위한 도시계획기법의 적용실태를 파악하기 위한 사례조사 및 분석을 실시하였다. 셋째, 앞서 두 단계에 걸쳐 도출된 계획기법에 대하여 여러 차례에 걸친 실무진 및 전문가 브레인스토밍을 진행하여 최종 계획기법을 도출하였으며, 적용가능한 공간위계와 기상재해와의 연관성을 검토하였다. 마지막으로 이를 바탕으로 기후변화 적응 도시의 부문별 전략을 제시하였다. 본 연구는 정책적 차원에 머무르고 있던 기존의 연구 단계에서 벗어나 실제 적용가능한 계획기법을 모색하였다는 데에 의의가 있으며, 연구의 결과는 향후 계획 수립 시 기초자료로 활용될 수 있다. This paper aimed at drawing out urban planning techniques and strategies for climate change adaptation. To achieve these goals, the following specific objectives were carried out: First, through a review of previous studies and related theories, thirty-three planning techniques were derived and categorized into five sectors and twelve planning goals. Second, current application level was analyzed and applicable planning techniques were derived from urban cases in US and Europe. Third, final planning techniques for climate change adaptation were derived through working group and experts' brainstorming. Lastly, strategies for climate change adaptation proposed. This paper would be the basic source and comprehensive information on establishment of urban planning for climate change adaptation.