조종성능을 고려한 파랑 중 선박의 직진성능에 관한 연구

강동훈,이순섭,이승재,Kang, Dong-Hoon,Lee, Soon-Sup,Lee, Seung-Jae 해양환경안전학회 2013 해양환경안전학회지 Vol.19 No.2

파랑 중 선박의 직진성능을 시뮬레이션을 통하여 비교 검토하였다. 시뮬레이션을 구성하기위해 선박의 3자유도 조종운동방정식을 사용했으며, 선박에 가해지는 파랑강제력은 3차원 특이점 분포법을 사용하여 계산하였다. 시뮬레이션의 외란으로서 규칙파와 불규칙파를 사용하였고 최대사용타각과 제어시간지연을 제어기의 제한조건으로 설정하였다. 조종성능에 따른 직진성능을 검토하기 위해 유체력 미계수를 인위적으로 변화시킴으로서 조종성능이 다른 선박의 시뮬레이션을 구성하였다. Autopilot제어기를 사용한 일정시간의 선박의 직진 시뮬레이션을 수행하고 해당시간동안의 직진거리를 비교하여 선박의 직진성능을 검토하였다. Course keeping ability of ships under wave are analyzed with wave. The simulation with three degrees of freedom is developed and 3-D source distribution method is applied to get wave force for the simulation. The simulation is conducted with the restriction of maximum rudder angle and time delay of control and regular wave and irregular wave are considered as the source of external forces. Simulations with ships which have different maneuverability with tuned hydrodynamic coefficients are developed to assess the variation of the course keeping ability depending on the ship's maneuvering characteristics. The course Keeping ability is evaluated by comparison of distance while the ships are simulated with autopilot control.

고밀도 폴리에틸렌 섬유의 가닥수에 따른 크리프 특성 및 예측

강동훈,최재호,장기혁,홍충희,박원호,Kang, Dong Hoon,Choi, Jae Ho,Jang, Ki Hyuk,Hong, Choong Hee,Park, Won Ho 한국섬유공학회 2017 한국섬유공학회지 Vol.54 No.2

igh-density polyethylene (HDPE) is widely used in industrial applications due to its versatility and chemical resistance. Lately, its versatility has been further expanded by surface cross-linking and modification. Also, reduction in the weight of polyethylene is one of the most important requirements in the industry. Creep test is a common method for studying the behavior of materials over a long period of time to design their industrial applications. Since a conventional creep test requires more than a test time of 10,000 h, a relatively short-time creep behavior can be predicted using time-temperature superposition (TTS) or mathematical modeling. The long-term creep behavior can be predicted by mathematical modeling using the short-term creep data. In this study, the creep behavior of HDPE fibers was measured in the load range of 20-50% of the ultimate tensile strength (UTS), and compared in terms of the number of filaments and denier. The long-term creep behavior was successfully predicted using the short-term creep behavior data obtained by mathematical modeling. Therefore, this approach can be used to predict the number and denier of PE fibers in industrial applications.

여성의 벨리댄스 참여가 신체상과 생활만족에 미치는 영향

강동훈 ( Dong Hoon Kang ) 한국미용학회 2009 한국미용학회지 Vol.15 No.3

This study sought to provide more useful information in understanding bellydance participants by clarifying the relationship between body image and life satisfaction according to the degree of the belly dancers` participation while the purpose of this research is to empirically clarify the influence that participation of bellydance (frequency, intensity, time, career) has on body image and life satisfaction. For this, the satisfied cluster random sampling was used targeting women in their 20s to 50s residing in Seoul, Gyoenggi-do, and Incheon; and a questionnaire was used as a measurement method; reliability, frequency, multiple regression, and correlation analyses were performed for the research data processing; and the SPSS 12.0 program was used for statistical processing. The results of this study: first, the participant degree following background specialties had a significant influence; the participation frequency and intensity increased when age decreased, and participation intensity decreased when age increased. Second, the participation degree showed a significant influence on body image. In addition, evaluation of body decoration rose when participation career and intensity are higher while the higher participation frequency, intensity, and career become, the more they helped body image. Third, participation of bellydance showed a positive influence on life satisfaction. That is, participation in belly dance positively influenced life satisfaction. Fourth, the body image of bellydance participants was revealed as having significant influence on their life satisfaction while the positive influence on the body image of bellydance participants also showed a positive influence on life satisfaction. Such a result showed that participation in bellydance, a form of life dance, helps establish women`s body image and has a positive influence on life satisfaction as well.

제거된 인공수정체의 임상적 조직병리학적 연구

강동훈(Dong Hoon Kang) 대한안과학회 1990 대한안과학회지 Vol.31 No.5

11kW 펌프용 인버터 Heat Sink 최적설계

강동훈(Dong-Hoon Kang),이관수(Kwan-Soo Lee),김진홍(Jin-Hong Kim),김주한(Joo-Han Kim) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.4-3

제 4 발표장 : 광섬유 센서를 이용한 구조물의 열변형 및 온도 측정

강동훈(Dong Hoon Kang),강현규(Hyun Kyu Kang),류치영(Chi Young Ryu),홍창선(Chang Sun Hong),김천곤 한국복합재료학회 2000 한국복합재료학회 학술발표대회 논문집 Vol.- No.1

사회경제적 박탈 경험이 노인의 자살생각에 미치는 영향: 6가지 박탈 유형을 중심으로

강동훈(Kang, Dong Hoon),김윤태(Kim, Yun Tae) 한국노년학회 2018 한국노년학 Vol.38 No.2

이 연구는 사회경제적 박탈 경험이 노인의 자살 생각에 미치는 영향을 분석하는 것을 목적으로 한다. 분석 자료는 한국복지패널 9차년도 자료를 사용하였으며, SPSS를 활용하여 빈도분석, 평균차이분석, 상관분석, 로지스틱 회귀분석 등을 실시하였다. 주요 분석결과는 다음과 같다. 첫째, 공적연금을 받지 못했던 경험, 근로능력이 있으나 실업 상태였던 경험, 경제적 어려움으로 균형 있는 식사를 할 수 없었던 경험, 먹을 것이 떨어졌는데도 더 살 돈이 없었던 경험 등의 순으로 박탈 빈도가 높았다. 둘째, 배우자가 없는 경우, 학력과 소득수준이 낮을수록 자살 생각이 높은 것으로 나타났다. 셋째, 돈이 없어서 본인이나 가족이 병원에 갈수 없었던 경험, 2달 이상 집세가 밀렸거나 집세를 낼 수 없어 집을 옮긴 경험, 먹을 것을 살 돈이 없어 균형 있는 식사를 할 수 없었던 경험, 공과금을 기한 내납부하지 못한 경험, 근로능력이 있으나 직업을 갖지 못한 경험, 경제적인 어려움 때문에 먹을 것이 떨어졌는데도더 살 돈이 없었던 경험 등이 노인의 자살 생각에 통계적으로 유의미한 영향을 미치는 것으로 나타났다. 이러한 연구 결과를 토대로 이 논문은 의료급여 사례관리 확대, 노인 주거급여 및 정주 여건 개선, 노인 식생활실태 조사 강화, 노인 공과금 지원 방안 확대 등의 정책 방안을 제시하였다. The study aims to analyze the effects of socio-economic deprivation on suicidal ideation. The analysis data were used as a guide for Korea Welfare Panel Study 9. the frequency analysis, mean difference analysis, correlation analysis, and logistic regression were performed by SPSS programs. The results of analysis are as follows. First, The results of frequency analysis by deprivation type showed a high frequency of deprivation in the following order. Experience of not receiving a public pension, experience of being able to work but unemployed, experience of not being able to eat a balanced diet due to financial difficulties, and experience where you had nothing to eat but no more money to buy. Second, the average difference analysis shows that when a person does not have a spouse, the lower the academic background and the income level, the higher the likelihood of suicide. Third, regression analysis shows that the following deprivation patterns have a statistically significant effect on older adults’ thoughts of suicide. Experience in which the respondents or their family could not go to hospital because they had no money, experience that move house because is back rent more than 2 months or can not pay rent, experience that they could not afford to buy food and eat well-balanced meals, experience of failing to pay your bills on time, experience of being able to work but not having a job, and experience in which financial difficulties left them short of food and no money to live. Based on such research results, some policy measures, such as the expanding management of medical care benefits cases, the improvement of elderly housing, residential conditions and the diet survey for the elderly, and the expansion of measures to support elderly people s tax rates, were proposed.

정상인의 대장내압검사 소견

강동훈(Dong Hoon Kang),송치욱(Chi Wook song),최재현(Jai Hyun Choi),현진해(Jin Hae Hyun) 대한소화기학회 1997 대한소화기학회지 Vol.29 No.5

N/A Background/Aims: The physiological mechanisms of the whole colon has not yet been established because the only available data comes chiefly from distal colonic segments, therefore the rnotor response of the whole colon to a rneal is still not fully understood. The purpose of this study is to evaluate the motor function of the whole colon and to investigate the proximal and distal colonic motor response to a meal in healthy subjects. Methods: Thirty one healthy volunteers were studied with a colonoscopically positioned multilumen manometric catheter and a low compliance infusion system. Recordings were obtained for 4 hours during fasting and for 4 hours after a standard mixed meal(810 Calory). Results: During fasting, motility was quite low and no significant differences between the proximal and the distal colon were observed. After a meal, motor activities increased in each segment significantly throughout the subsequent recording periods. Ascending and transverse colon had at first a sudden maxirnal increase and then a decrease. Whereas, the distal segments had a slower and more sustained increase in its activity. In 21 of 31 subjects, there were 48 isolated high propagated contractions(HAPCs) in each segments of the whole colon for 8 hours. The mean amplitude was recorded as being 127.3+26.7 mmHg, and the rnean duration was found to be 17.6>2.9 seconds, and the rnean velocity was 0.7+0.1 cm/sec. The peristaltic contractions were often felt as an urge to defecate or proceded defecation and this could represent the manometric equivalent of the mass movement in the colon. Conclusions: Manometric measurement of the whole colon is a useful diagnostic method to directly evaluate the colonic motor function and may be used to study the pathophysiology of colonic motor funtion of patients with colonic motility disorders. (Korean J Gastroenterol 1997; 29:610-619)

조기 유두부암 1 예

강동훈(Dong Hoon Kang),송태진(Tae Jin Song),이성일(Seong Il Lee),김종웅(Jong Woong Kim),김혜랑(Hye Rang Kim),김창덕(Chang Duck Kim),류호상(Ho Sang Ryu),현진해(Jin Hai Hyun) 대한내과학회 1989 대한내과학회지 Vol.37 No.4

N/A With progress in diagnostic procedures such as duodenoscopy and endoscopic retrograde cholangiopancreatography (ERCP), early diagnosis of ampullary cancer has become possible. Ampullary cancer shows poor prognosis generally, but shows variable outcome according to tumor invasion to underlying tissue, Ampullary cancer not infiltrated beyond Oddi`s muscle shows excellent postoperative outcome because of high curability of early ampullary cancer. We experienced a case of early ampullary carcinoma, who was admitted due to jaundice and RUQ discomfort, and was diagnosed by duodenoscopy and surgical specimen obtained by Whipple`s operation.

고객불량행동이 객실 승무원의 부정적 감정과 친 사회적 행동에 미치는 영향

강동훈(Kang, Dong-Hoon),한서윤(Han, Seo-Yoon),이재섭(Lee, Jae-Sub) 한국관광레저학회 2015 관광레저연구 Vol.27 No.1