지역난방 방식 건축물의 난방 급탕 통합배관 시스템 실증연구

이수현(Su Hyun Lee),안희수(Hui su Ahn),김성범(Seong Beom Kim),홍영기(Young Gi Hong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11

The purpose of this study is to verify the efficiency of the integrated piping system that has been recently distributed in Korea through empirical research. The peak and average usage of the integrated pipe system was lower than that of the 4-pipe system, and the primary return temperature of the district heating was maintained at an appropriate temperature. In addition, the heat return temperature of the HIU(Heat interface unit) installed in the integrated pipe system was maintained at a low temperature to prove its efficiency.

한국 디스크골프 활성화 방안연구

이수길(Su-Gil Lee),김두기(Du-Gi Kim),이승도(Seung-Do Lee),강준구(Jun-Koo Kang) 한국엔터테인먼트산업학회 2016 한국엔터테인먼트산업학회 학술대회 논문집 Vol.2016 No.11

디스크골프는 전 세계에서 가장 급성장하는 스포츠중의 하나이다. 미국을 중심으로 캐나다, 유럽, 일본, 호주, 대만 등 생활스포츠로 수많은 동호인과 대회를 통해 빠른 성장을 하고 있다. 우리나라에는 2007년부터 본격적으로 보급되기 시작했지만 제도적 지원의 부족으로 인한 디스크골프 코스의 부재, 전문가 육성 교육시스템의 부재, 상업화 우선의 사회풍조, 생활체육 지원사업의 구조적 모순으로 현재까지 일부 극소수의 동호인만이 활동을 하고 있는 실정이다. 본 연구에서는 사례국의 디스크골프 보급과 저변화가 국내에도 적용되기 위해서는 정책 제도적으로 주무부서 및 관계 지차체, 해당기관의 적극적 지원을 통한 지역별 디스크골프코스의 개발이 가장 우선적으로 시행되어야 하며 전문가를 통한 생활체육 지도자를 육성하여 지역별 동호인과 스포츠인재를 육성함과 함께 디스크골프 프로그램 전문 운영자를 통한 지역별, 기간별 대회와 전국대회 및 국제대회를 개최하여 자발적이고 지속적인 생활체육활동을 위한 참여 동기와 환경을 제공해야 하는 것으로 분석되었다. This study aims to review the necessity of Disc Golf as a life sport program and propose directions for Disc Golf regarding the policy support, the environmental utilization and development of sport and park facilities, the development on efficient life sport program operation for distribution and Activation. The policy support status and the condition of facility environment and the actual status of Disc Golf in Korea are investigated. For the data analysis, inference method and content analysis method are performed in parallel. And based on the procedure from the analysis, the following conclusions are drawn. First, Disc Golf has High Value as an Environment Friendly Sport for All. Disc Golf is not restricted by economy, time or space and does not damage the nature. Second, Many Policy Supports Provided for the Distribution and the Base Expansion to become a Sport for All. Third, The Facility"s Environmental Composition is the most Important Factor in the Distribution and the Activation of Disc Golf. Fourth, For Voluntary and Continuous Participations, Professional Program Operation is Required. Fifth, Through Efficient Utilization of Space, Excellent Facility Environment for Disc Golf can be Established.

유기인계 살충제 중독증에서의 혈청 Amylase 활성도

이수기 ( Lee Su Gi ),이은경 ( Lee Eun Gyeong ),정지인 ( Jeong Ji In ),정정희 ( Jeong Jeong Hui ),조준탁 ( Jo Jun Tag ),이진관 ( Lee Jin Gwan ) 대한내과학회 1993 대한내과학회지 Vol.44 No.4

Dressel 등이 anticholinesterase 살충제 중독으로 인한 임상적인 급성 췌장염을 보고한 이래 몇몇 증례가 있었고, 최근에는 Lankish 등에 의해 급성 췌장염이 보고되었다. 이에 본원에서도 이약물 중독으로 내원한 환자를 대상으로 췌장의 병발을 조사하여 다음과 같은 결론을 얻었다. 1) 유기인계 살충제 중독증 환자 31예중 17예(55%)에서 혈청 amylase가 정상치를 초과하였고 이 17예 중 5예(16%)에서 혈청 amylase가 500 U/dl 이상으로 급성 췌장염의 가능성을 시사하였다. 그러나 복통이나 장폐색등의 증세는 나타나지 않았다. 2) 급성 췌장염의 가능성을 보인 환자 5예에서 복부 초음파를 실시했는데, 1예에서 췌장의 체부와 미부에 부종 소견을 보였고 치료후 부종이 소실되었으며, 4예에서는 정상소견을 보였다. 3) 상승된 혈청 amylase는 3일이내에 거의 대부분 정상화되었으며 1예에서만 4일째 정상화되었다. 4) 의식 변화가 있으면서 기계 호흡이 필요했던 중증 중독증 환자들에게서 평균 혈청 amylase 423 U/dl로 제일 높았고, 혈청 amylase 500 U/dl 이상으로 급성 체장염의 가능성을 시사한 것도 4예로 가장 많았다. 이상의 결과로 보아 이 약물 중독 환자의 반 수 이상에서 혈청 amylase치가 정상 범위를 초과하였고 1/6정도의 환자에서 500 U/dl를 초과하여 임상적 췌장염의 가능성을 시사하였다. 따라서 우리나라 농촌 지역에서 흔히 발생하는 유기인제 중독증 환자에 있어, 특히 중증 환자 치료 중에 장 폐색증이나 복막염의 병발이 있을 경우 췌장염 발생에 관심을 가져야 할 것으로 생각된다. Organophosphate insecticides are used allover the world and are household items in the rural area of the Korea. Because of their easy accessability, their ingestion either accidentally or for a suicidal purpose is common in the Korea. Acute pancreatitis occuring as a complication of an anticholinesterase insecticide intoxication was first reported by Dressel et al(1979) and has since been reported by other investigators. Among them, pancreatitis with unresponsiveness followed by pseudocyst, or painless hemorrhagic pancreatitis only menifested by ileus and abcominal distension was founded after intoxication. We had serial serum amylase determination and clinical evaluation on 31 patients of organophosphate intoxication. The results were as follows. In the 31 patients of poisonous organophosphate insecticide, serum amylase was elevated in the 17 patients and was assumed to show pancreatic involvement. Btu, abdominal pain or ileus was absent. In 5 of 17 patients, serum amylase level was more than 500 U/dl and suggested to evoke acute pancreatitis. All of the 5 patients receive upper abdominal ultrasonography. In one patient, there was an edematious change in the body and tail of the pancreas and normalized in the following study. Others were normal. Severely affected patients who needed respiratory assistance and had mental change, mean serum amylases value was the hightest and the possibility of acute pancreatitis was the greatest. In our study, forfunately, all the patients discharged without complication of acute pancreatitis. Therefore, in the patients of organophosphate insecticide intoxication, if ileus or suspicious peritonitis is presents, we must consider the development of acute pancreatitis.

비대칭 다차원척도법의 시각화

이수기,최용석,이보희,Lee, Su-Gi,Choi, Yong-Seok,Lee, Bo-Hui 한국통계학회 2014 응용통계연구 Vol.27 No.4

다차원척도법(MDS)에서는 대게 개체간의 거리나 유사성이 대칭성을 따른다. 따라서 비대칭 거리를 다루기는 쉽지 않다. 통용되고 있는 비대칭 다차원척도법도 여전히 결과를 해석하는데 어려움이 있다. 본 연구는 비대칭행렬의 순서 통계량을 활용하여 더 간단한 비대칭 대차원척도법을 제안한다. 제안된 웹(Web) 방법은 개체간의 영향력을 사용자들이 해석을 쉽게 하도록 화살표의 방향크기와 모양에 따라 시각화하여 보여준다. Distances or dissimilarities among units are assumed to be symmetric in most cases of multidimensional scaling(MDS); consequently, it is not an easy task to deal with asymmetric distances. Current asymmetric MDS still face difficulties in the interpretation of results. This study proposes a simpler asymmetric MDS that utilizes the order statistic of an asymmetric matrix. The proposed Web method demonstrates that some influences among objects are visualized by direction, size and shape of arrow to ease the interpretability of users.

벤틸레이티드 디스크 브레이크 로터의 최적설계

이수기,성부용,하성규,Lee, Su-Gi,Seong, Bu-Yong,Ha, Seong-Gyu 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.3

The shape optimization is performed to minimize the judder of ventilated disc brake rotor that is induced by the thermal deformation of the disc. A three-dimensional finite element is developed to analyze the coupled system of temperature and displacement field, and the thermal conductivity and mechanical stiffness matrices are simultaneously taken into account. To reduce computing time, an equivalent heat transfer rate is introduced approximating the heat transfer rate on the disc surface. A deformation factor is introduced to describe the thermal deformation causing the judder. The deformation factor is chosen as an objective function in the optimization process. Consequently an optimum design is then performed minimizing the deformation factor with the design variables of the shape of the disc. The optimum design procedure presented in this study is proven to be an effective method of minimizing the judder, and it reduces the thermal deformation by 23% of the initial geometry.

이중 고정자 횡축 SRM을 활용한 전기오토바이크 구동/충전 시스템

이수지(Su Ji Lee),김다은(Da Eun Kim),김채현(Chae Hyun Kim),박기표(Gi Pyo Park),정재호(Jae Ho Jeong),조현섭(Hyun Sub Cho),안진우(Jin Woo Ahn) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.5

해상에서 소형 객체 인식을 위한 데이터 전처리 방안 연구

김기관(Gi-Gwan Kim),노천명(Chun-Myoung Noh),이수봉(Su-Bong Lee),이순섭(Soon-Sup Lee),이재철(Jae-Chul Lee) (사)한국CDE학회 2021 한국CDE학회 논문집 Vol.26 No.4

Implementing good performance deep learning requires a large amount of high-quality data. However, in areas where the amount of data is limited, data collection takes a lot of time and cost. This study attempts to detect small object-sized submarine masts based on the environmental characteristics of the sea, which limit data collection and reduce the amount and quality of data due to the characteristics of submarine data used in the study. This study aims to improve recognition performance through preprocessing techniques with a small amount of data, and it can be seen that recognition performance has improved based on mAP.

전철주기초 설계 자동화를 위한 최적화 알고리즘의 적용성 검토

이기열(Lee Gi-Yeol),박용대(Park Yong-Dae),정원용(Chung Won-yong),송규석(Song Kyu-Seok),임선택(Lim Sun-Taek),김종남(Kim Jong-Nam),이수형(Lee Su-Hyung) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월

This paper examined an applicability of optimum algorithm to develope an electric railway pole foundation automated design system. Based on the optimization theory that considered subgrade and bearing capacity characteristics, decided an optimum section of electric railway pole foundation. In this research, Optimum algorithm used the feasible direction method in structural analysis and design efficiently. Design variables are considered geometric properties and anchor bolt area of the electric railway pole foundation as optimum construction cost. Constraints are considered settlement, overturning and activity of foundation. And, also composed flexural and shearing strength. According to optimum analysis result, optimization theory is available more economical design comparing with railway pole foundation that is constructed by current standard drawing, and applicability verified in automated design system development.

기존 프로그램 분석을 통한 전력선 지지구조물 기초의 설계 자동화 알고리즘 개발

이기열(Lee Gi-Yeol),박용대(Park Yong-Dae),정원용(Chung Won-yong),송규석(Song Kyu-Seok),김종남(Kim Jong-Nam),이수형(Lee Su-Hyung) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월

This paper analyzed the existing program used to domestic and foreign electric power facilities design and developed the automated design programming algorithm for railroad electric power facilities. The program used to analysis of this study targeted three total such as electricity railroads which included a rapid transit railroad. Analysis variable selected general input and output interface and input data and output information and design calculation algorithm. According to results that analyzed the existing program, the input stage will composed that designer can input directly an aspect form of user definition that can be implementation of the GUI suitable for Windows and the acting load which wind load data were included in as necessary data for a railway pole foundation. Output stage shall be composed that can be displayed to geometrical numerical value.

전기오븐에서 과열증기주입에 따른 열처리가 닭고기의 이화학적 특성변화에 미치는 영향

천지연,권봉구,이수현,민상기,홍근표,Chun, Ji-Yeon,Kwon, Bong-Gu,Lee, Su-Hyun,Min, Sang-Gi,Hong, Geun-Pyo 한국축산식품학회 2013 한국축산식품학회지 Vol.33 No.1

This study was carried out to observe the effect of superheated steam combined with oven heating on the physico-chemical and sensory properties of chicken meat. Specially, chicken breasts and thighs were heated for 40 min in various heating formulations such as oven heating, superheated steam heating or a combination of two kinds of heating. In the physical properties measurement, the shear force was increased as superheated steam heating time and chicken thighs were higher than chicken breasts in all treatments (p<0.05). The highest level of water holding capacity was solely superheated steam treated chicken for 40 min (p<0.05). The $L^*$ value was decreased but $a^*$ value or $b^*$ value were increased after cooking. Chicken breast exhibited a higher colour value than chicken thigh. Superheated heating was effective to reduce heating loss as 22.64% (p<0.05). However, pH was not different depending on the heating formulation or part of the chicken meat (p>0.05). In the sensory test, the combination of 10 min oven heating and 30 min superheated steam heating was effective to create a good flavour of chicken meat. In this study, an optimum formulation was developed which was a combination of 10 min oven heating and 30 min superheated steam heating. It was more effective to improve the quality of chicken meat than the single heat treatment of chicken meat.