Effects of Controlled Photoperiod on Body Development in Growing Juvenile Rats

Seunghoon Lee,Han-Ki Lee,Jinhee Shin,Yunkyung Hong,Sang-Kil Lee,Sangun Lee,Takao Suzuki,Taeyoung Kang,Yonggeun Hong 한국동물번식학회 2010 Reproductive & developmental biology Vol.34 No.2

Changes in Tissue Skin Blood Flow and Pulse Rate During Partial and Partial Contrast Bathing Induced by Differences in Body composition Between Males and Females

Sangun Lee,Yongkwon Kim,Takao Suzukli,Astuko Sato 한국지역사회건강관리협회 2005 대한건강과학학회지 Vol.2 No.2

Effects of Psychogenic Stress Frequency during the Growth Stage on Oxidative Stress, Organ and Bone Development

Sangun Lee 대한골대사학회 2024 대한골대사학회지 Vol.31 No.3

Background: This study aimed to examine the effects of psychogenic stress (PS) frequency on oxidative stress and organ development during growth and to gain fundamental insights into developmental processes during this period. Methods: Four-week-old male Wistar rats were randomly assigned to a control and three PS groups according to PS frequencies. PS was induced using restraint and water immersion techniques once daily for 3 hr at a time for a period of 4 weeks. Results: Oxidative stress increased with increasing PS frequency. The weights of organs other than the adrenal glands significantly decreased with increasing PS frequency, indicating growth suppression. Furthermore, bone morphology, weight, and length significantly decreased with increasing PS frequency. Conclusions: High-frequency PS exposure during developmental growth significantly negatively affects oxidative stress and organ and bone development. In particular, increased oxidative stress due to excessive PS has detrimental effects on organ and bone growth.

The Influence of the Type of Continuous Exercise Stress Applied during Growth Periods on Bone Metabolism and Osteogenesis

Sangun Lee,Takao Suzuki,Hiromi Izawa,Atsuko Satoh 대한골대사학회 2016 대한골대사학회지 Vol.23 No.3

Background: In this study, we examined the influence of exercise loading characteristics on bone metabolic responses and bone morphology in the growth phase and adulthood. Methods: Running exercise (RUN) and jumping exercise (JUM) were used for the exercise loading in 28-day-old male Wistar rats. Bone metabolism was measured by blood osteocalcin (OC) and tartrate-resistant acid phosphatase (TRACP) levels. For bone morphology, the maximum bone length, bone weight, and bone strength of the femur and tibia were measured. Results: A pre- and post-exercise loading comparison in the growth phase showed significantly increased OC levels in the RUN and JUM groups and significantly decreased TRACP levels in the JUM group. On the other hand, a pre- and post-exercise loading comparison in adulthood showed significantly decreased TRACP levels in the RUN and JUM groups. Femur lengths were significantly shorter in the RUN and JUM groups than in the control (CON) group, while bone weight was significantly greater in the JUM group than in the CON group. Conclusions: Exercise loading activates OC levels in the growth phase and suppresses TRACP levels in adulthood. On the other hand, these results suggest that excessive exercise loading may suppress bone length.

빅데이터 기반 스마트 통합 모니터링 및 분석 시스템

이상운(Lee, SangUn),이정규(Lee, JungGyu) 한국방송·미디어공학회 2015 한국방송공학회 학술발표대회 논문집 Vol.2015 No.7

ICT 기술이 급속하게 발전함에 따라 수없이 많은 기술이 등장하고 정착되고 안정화되고 있는 상황에서 빅데이터 이슈는 매우 중요하다. 이러한 변화에 빠르게 대응하는 개인이나 기업에게 엄청난 새로운 기회와 부가가치 창출을 제공을 부여해 주고 있다. 현재 방송분야에서는 빅데이터 기술이 콘텐츠 서비스 분야에서 활발히 적용되고 있으며 그 영역이 점차 확대되고 있는 추세이다. 이에 본 논문은 디지털 방송 시스템을 구성하고 있는 다양한 기기에서 발생되는 장애나 이벤트를 빅데이터 분석을 통해 통합관제 모니터링, 통계 및 분석을 통하여 처리할 수 있는 시스템을 제안한다. 제안한 시스템은 방송 인프라 통합 관리, 실시간 이벤트 검색, 장애 분석 및 리포팅 기능을 제공함으로써 문제점을 신속히 파악하여 안정적인 방송 운영을 지원하도록 한다. 또한 각종 방송 장비들의 로그 정보를 수집하여 서비스 상태 및 작업 통계를 통한 시스템의 가용성을 평가할 수 있도록 한다.

Selectivity of the optical isomers of KR30031 on MDR reversal activity and cardiotoxicity

Choi SangUn,Yoo SungEun,Yi KyuYang,Kwon MyungJa,Lee ChongOck,Lee ByungHo 大韓藥學會 2002 大韓藥學會 總會 및 學術大會 Vol.2002 No.2

무선 센서 네트워크에서 모바일 싱크 기반 비용 효율적인 데이터 수집 기법

이상언(Sangun Lee),김재훈(Jai-Hoon Kim),이택균(Taekkyun Lee),홍만표(Manpyo Hong) 한국통신학회 2015 한국통신학회 학술대회논문집 Vol.2015 No.06

청년층 1인 임차가구의 주거비부담 영향요인 분석

이상운 ( Lee Sangun ),곽민주 ( Gwak Minjoo ) 한국금융소비자학회 2019 금융소비자연구 Vol.9 No.3

소득 여력이 낮은 청년층은 학업 및 취업 기간의 연장, 결혼관의 변화로 인한 결혼의 지연과 포기로 인해 1인 가구가 증가하고 있어 주거수준이 열악하거나 소득 대비 주거비가 과도하여 주거불안층으로 분류할 수 있다. 본 연구에서는 2018년 주거실태조사를 이용하여 청년층 1인 임차가구의 주거비부담 수준과 그 영향요인을 살펴보았다. 본 연구의 주요 연구결과는 다음과 같다. 첫째, 청년층 1인 임차가구의 주거 특성을 살펴본 결과, 다가구 단독주택(52.8%)의 비율과 보증부 월세(89.1%) 비율이 가장 높았다. 매월 평균 8만원의 주거관리비와 38만원(보증금을 월세로 전환하여 합산한 금액)의 월세를 지출하고 있었다. 둘째, 청년층 1인 임차가구의 주관적 주거비부담은 3.13점으로 주관적인 주거비부담 수준이 높았으며, 객관적 주거비부담(RIR)은 평균 26.03으로 월 소득 대비 26.03%를 임대료로 지출하고 있었다. 또한 청년층 1인 임차가구의 25%가 주거비 과부담 기준(30%)을 초과하여 임대료를 지출하고 있었다. 셋째, 청년층 1인 임차가구의 주거비부담 영향요인으로 성별, 직업, 거주지역, 임대주택 유형인 것으로 나타나 여성 가구주이고, 상용근로자가 아닌 경우, 서울 및 경기도와 민간 임대주택에 거주하는 경우 주거비부담이 높은 것으로 나타났다. 이러한 영향요인을 기반으로 하여 청년층 1인 임차가구의 주거비부담을 낮추기 위한 맞춤형 주거복지 지원정책을 펼쳐야 할 것으로 생각된다. The young population with lower income capacity have prolonged years of study and job hunting and different views of marriage from the older generation, which leads to their delaying or giving up marriage. As a result, single-person households are growing among the young population with inferior housing levels or excessive housing cost to income ratio. They are thus classified into the unstable housing category. This study set out to investigate the housing cost level of single-youth renter houses and its influential factors based on the data of Korea Housing Survey 2018. The main findings were as follows: First, the study examined the housing characteristics of single-youth renter households and found that multi-family detached houses(52.8%) and monthly recent with a security deposit(89.1%) recorded the highest percentage. They spent average 80,000 won on housing maintenance and 380,000 won(including the security deposit converted into monthly rent) on monthly rent a month. Second, single-youth renter households scored 3.13 points in subjective housing cost burden, which indicates that they had a high level of subjective housing cost burden. Their objective housing cost burden(RIR) were mean 26.03, which means that they spent 26.03% of their monthly income on rent. In addition, 25% of single-house renter households paid rents over the excessive housing cost burden standard(30%). Finally, factors influencing the housing cost burden of singleyouth households were gender, occupation, area of residence, and type of rental house. The level of housing cost burden was high among female householders that were not regular employees, lived in Seoul or Gyeonggi Province, and resided in a private rental house. These findings raise a need to implement policies to support custom housing welfare based on the influential factors identified in the study to lower the level of housing cost burden for single-youth renter households.

청년층 자가가구의 주거실태 및 주택 마련 부담

이상운(Lee, Sangun) 충북대학교 생활과학연구소 2019 생활과학연구논총 Vol.23 No.2

The purpose of this study is to provide the basic data for the policy establishment to promote owner-occupation of the young people by identifying the housing situation and the burden level for housing of the young people. The data are the data of the housing situation survey of the Ministry of Land, Infrastructure and Transport in 2017. The analysis content is socio-demographic characteristics, economic characteristics, residential situation, and residential burden level. The analysis method is frequency, mean, crosstab and ANOVA using SPSS 24.0. The results of this study are as follows. 1) Most of the household heads of the young people in the household were male, and most of them were 30 years old. The education level was higher than university graduation, marriage status was mostly marriage. The number of households was more than two. This is because self-owned households buy homes after marriage. 2) The proportion of residents in the capital area is low and the proportion of residents in the province area is high. This seems to be due to the difference in housing prices between capital and provincial areas. Housing type was mostly apartment. 3) Satisfaction with current housing was 3.12. Satisfaction with the present condition of the house is more than 2.5 points in all items. 4) Most of the purchasing methods purchased ready-made houses. The methods of funding were self-financing, loans by financial institutions, and gratuities such as parents and relatives. They were feeling a little burdened by the repayment of the loan. They needed a housing support program. The housing support programs needed were housing loan fund support, publicly-sold housing supply, housing consultation and information provision, housing improvement, remodeling and loan support.

고속버스용 휠체어 탑승 승강장치 설계 연구

이용우(Yongwoo Lee),이규방(Gyubang Lee),김상운(Sangun Kim),강종갑(Jonggap Kang),마상진(Sangjin Ma),강병도(Byungdo Kang),장형성(hyungsung Jang),하성용(Sungyong Ha) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6

In the rapidly aging society, wheelchair users are continually increasing. For public welfare for the disabled, the public transportation service systems should be improved. In order to improve the mobility of the disabled, it has been required to develop a special model of the express buses. For a development of express bus for wheelchair users, it has to be developed with the specially designed entrance and lift systems. This study has been conducted to the design of a wheelchair lift system for express buses and evaluated structural integrity using finite element model. For the analytical evaluation, the strength analysis for standard load and endurance load were performed using FMVSS Part 571.403. In case of standard load, the maximum stress of the lift system was 29.5% of the yield stress, and it was evaluated that the lift system ensures against the guarantee load. It is expected that the result of this study will be utilized in the related welfare industry.