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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.
강동훈(Kang, Dong Hoon) 경성대학교 사회과학연구소 2015 社會科學硏究 Vol.31 No.1
본 연구는 종교 활동 참여도가 대인관계 만족에 어떠한 영향을 미치는 지 살펴보고 그 함의를 도출하고자 하였다. 이를 위하여 2012년에 조사한 한국노동패널 15차 자료를 이용하였으며, SPSS 21.0 통계패키지를 이용하여 빈도분석, 교차분석, t-test, 회귀분석을 실시하였다. 주요 연구결과는 다음과 같다. 첫째, 종교 활동 참여도는 대인관계만족도에 정(+)의 유의미한 영향을 미치는 것으로 나타났다. 즉, 종교 활동 참여도가 높을수록 대인관계만족도는 높아지는 것으로 나타났다. 둘째, 종교 활동 참여도가 높은 종교인은 종교 활동 참여도가 낮은 종교인에 비해 대인관계만족도가 높은 것으로 나타났다. 셋째, 종교인은 비종교인에 비해 대인관계만족도가 높은 것으로 나타났다. 2013년 자살실태조사 결과, 자살시도 원인 중 31.2%가 대인관계 어려움으로 인한 것이었다. 군대의 관심사병, 집단따돌림 학생 등 대인관계에 어려움을 겪고 있는 사람들에게 종교 활동 참여가 하나의 해결방안이 될 수 있을 것이다. The purpose of this study is to examine participation in the religious activities is what effect the interpersonal relationship satisfaction. I used the 15th KLIPS(Korea Labor and Income Panel Study) in 2012 for the study, performed frequency analysis, crosstabs, t-test, regression analysis using SPSS 21.0. Main findings are as follows. First, participation in the religious activities provided a significant positive effect on interpersonal satisfaction. In other words, the higher the participation in religious activities, interpersonal relationships showed higher satisfaction. Second, population has a high degree of participation in the religious activities, was found to be high satisfaction of interpersonal relationship, compared to a population is low participation in religious activities. Third, interpersonal relationship satisfaction of religious population was found to be higher than the secular population. According to the results of the 2013 survey of suicide, 31.2% of the cause of attempt of committing suicide it was due to the difficulty of interpersonal relationships. Participation in religious activities may become one of the solutions to the people experiencing difficulties in interpersonal relationships such as a soldier with specific care, outcasted students.
강동훈(Dong-Hoon Kang) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Load cell is one of the most fundamental measuring instruments in many application fields. Generally, common load cells are based on the demodulation principle using electric strain gages (ESGs). However, many electric sensors including ESGs are easily influenced by electro-magnetic interference (EMI), which causes measurement errors. For the reason, the necessity of load cells that are immune to EMI is gradually increasing. Fiber optic sensors, especially fiber Bragg grating (FBG) sensors are widely used for various applications because of good multiplexing capabilities and also have many advantages such as wide temperature ranges, small size and immunity to EMI. In this paper, one-axis load cell is manufactured using FBG sensors and verified through a tensile test on a universal testing machine. From the experimental results, it was successfully demonstrated that FBG sensors can be a good counterproposal for sensing elements of load cells.
여성의 벨리댄스 참여정도가 여가만족과 운동지속의사에 미치는 영향
강동훈(Kang Dong-Hoon),심성섭(Shim Sung-Sub) 한국체육과학회 2009 한국체육과학회지 Vol.18 No.3
This study aims to provide useful information in understanding those who take part in belly dancing by identifying the relations between leisure satisfaction and their intent to continue physical activities according to belly dance participation, and it is to empirically identify the effects that belly dance participation (frequency, intensity, time, experience) has on leisure satisfaction and intent to physical activities. For the purpose of the study, women in the age bracket of 20’s to 50’s residing in Seoul and Incheon were selected as subjects using stratified cluster random sampling. The data was collected using a questionnaire, and conducted by reliability analysis, frequency analysis, one-way ANOVA, and multiple regression analysis using the SPSS 12.0 program. The results of the study are as follows. First, the belly dance participation was found to have an effect on leisure satisfaction, and participation frequency showed significant differences in social satisfaction in sub factors of leisure activities. The result found that exercise intensity, duration, and participation intensity showed significant differences in physical satisfaction and environmental satisfaction. Second, level of participation in belly dance was found to have significant effect on intent to continue physical activities. In other words, the higher the level of participation, the higher was the intent to continue physical exercises, and the higher the duration and experience of participation, the higher was the possibility of continuing physical activities and the intent to continue. Third, the leisure satisfaction of belly dance participation was found to have an effect on the intent to continue physical activities. It shows the social satisfaction, a sub factor of leisure satisfaction, affects intent to continue the activities, and physical satisfaction on possibility of continuing the activities.
만성 B형 간염 보균자에서 간염의 급성 악화와 동반된 다발성 관절염
강동훈 ( Dong Hoon Kang ),서영일 ( Young Il Seo ),김율빈 ( Rul Bin Kim ),김호중 ( Ho Joong Kim ),임수영 ( Soo Young Lim ),한지숙 ( Ji Suk Han ),송수희 ( Su Hee Song ),임수경 ( Soo Kyung Lim ),김현아 ( Hyun Ah Kim ) 대한류마티스학회 2013 대한류마티스학회지 Vol.20 No.5
Hepatitis viruses (hepatitis B virus (HBV) and hepatitis C virus) have been associated with development of inflammatory arthritis. Approximately 400 million people worldwide have chronic HBV infection. HBV infection is the one of the most common causes of liver disease, and the prevalence of HBV infection in Korea is almost 6%. Arthritis in patients with HBV can be encountered in two settings: as a rheumatoid arthritis (RA)-like, acute, self-limited polyarthritis during the pre-symptomatic phase of acute hepatitis B, or, more rarely, as arthritis occurring in the context of HBV-associated polyarteritis nodosa (PAN). In both cases, the pathogenesis of arthritis is attributed to the deposition of immune complexes containing viral antigens (HBsAg or HBeAg) and their respective antibodies (anti-HBs and anti-HBe) in synovial tissues. Here we report on a case of polyarthritis associated with reactivation of chronic hepatitis B virus infection with a review of the literature.
복지정책에 대한 평가가 경제적 불평등 인식에 미치는 영향
강동훈 ( Dong Hoon Kang ),이봉원 ( Bong Won Lee ) 전북대학교 사회과학연구소 2015 지역과 세계 Vol.39 No.1
본 연구는 분야별 복지정책에 대한 평가가 경제적 불평등 인식에 어떠한 영향을 미치는지 살펴보고 정책적 함의를 도출하고자 하였다. 이를 위하여 2013년에 조사한 한국복지패널 8차 자료를 이용하 였으며, spss 21.0 통계 패키지를 이용하여 기술통계, 교차분석, t-test, 로지스틱 회귀분석을 진행하였다. 주요연구결과는 다음과 같다. 독립변수로 투입한 9가지 복지정책 중 빈곤정책과 실업정책, 교육정책이 경제적 불평등 인식에 유의미한 정(+)의 영향을 주는 것으로 나타났다. 즉, 빈곤정책과 실업정책, 교육정책에 부정적인 평가를 내린 사람일수록 경제적 불평등도를 높게 인식하고 있었다. 둘째, 통제변수로 투입한 인구학적 요소 중 학력수준, 소득수준, 거주지역이 유의미한 부(-)의 영향을 주는 것으로 나타났다. 학력이 낮을수록, 소득수준이 낮을수록, 중소도시 이하 규모에 거주하는 사람일수록 경제적 불평등도가 높다고 인식하고 있었다. In this study, we look at evaluation of welfare policy sectoral is what effect the recognition of economic inequality, it tries to derive the policy implications associated with it. For this reason, we use the 8th data of Korea Welfare Panel Study investigated in 2013, descriptive statistics, crosstabs, t?test and a logistic regression analysis were conducted by using the statistical package spss 21.0. The main findings are as follows. We found that poverty policy, unemployment policy and education policy in the welfare policy of nine introduced as an independent variables affects a significant positive effect to the recognition of economic inequality. In other words, the person who made the negative rating poverty policy, unemployment policy and education policy had recognized the high economic inequality. We have found that the academic level, income level, residential areas in the demographic element introduced as a control variables has a negative effect significantly. The more people the income level is low, the more people living on the scale of the small and medium-sized cities below, the more educational level is low, the recognition of economic inequality is high
강동훈(Kang, Dong-Hoon) 중앙사회복지연구회 2021 사회와 복지 Vol.3 No.1
본 연구의 목적은 사회적 관계가 노인의 자살 생각을 완화하는지 검증하는 것이다. 이를 위해 복지패널데이터 15차 자료(2020년)를 활용하여 기술통계분석, 평균차이분석, 로지스틱 회귀분석을 실시하였다. 분석 결과 가족 관계와 사회적 친분 관계에 대한 만족도가 높을수록 노인의 자살생각을 완화하는 것으로 나타났다. 이를 근거로 노인의 자살생각 완화를 위해 접근성 등에 장점이 있는 종교시설을 활용하여 노인의 사회적 관계 향상을 도모하는 정책적 실천적 제언을 하였다. The purpose of this study is to verify whether social relations relieve the elderly s suicidal thoughts. To this end, descriptive statistics analysis, average difference analysis, and logistic regression analysis were conducted using the 15th data of welfare panel data(2020). As a result of th analysis, it was found that the higher the satisfaction with family relationships and social intimacy, the more alleviated the elderly s suicidal thoughts. Based on this, policy and practical suggestions were made to improve the social relationship of the elderly by utilizing religious facilities with advantages such as accessibility to ease the elderly s suicidal thoughts.
선박 건조공정 개선을 위한 상황인지 컴퓨팅 기반의 강재적치처리시스템
강동훈(Dong-Hoon Kang),하창완(Chang-Wan Ha),김제욱(Je-Wook Kim),오훈(Hoon Oh) 한국컴퓨터정보학회 2011 韓國컴퓨터情報學會論文誌 Vol.16 No.6
선박 건조공정의 초기 단계인 강재적치처리공정에서는 입수한 강재를 어느 선박블록을 제작하는데 사용될 것인가에 따라 수십 개의 적치장을 이용하여 분류한다. 이 과정에서 강재를 잘못된 적치장에 적치하는 적치 오류, 무거운 강재를 다루는데 수반되는 작업자 안전 취약성, 각 적치장의 강재 정보 관리의 미비로 인한 작업 계획의 불확실성 등으로 인하여 생산성이 크게 저하된다. 이러한 문제점을 해결하기 위하여 상황인식 컴퓨팅 기술을 적용하여 지능형 강재적치처리시스템을 구축하였다. 연구의 효율성을 위하여 강재적치처리 작업과정을 보여줄 수 있는 시뮬레이터를 제작하였으며, 센서, RFID 태그, 실시간 위치추적시스템과 같은 기술을 활용하여 공간 내에 있는 객체들의 위치 및 작업 처리 상태 등, 상황정보를 실시간으로 획득할 수 있도록 유비쿼터스 컴퓨팅 공간을 구축 하였다. 본 연구는 유비쿼터스 컴퓨팅 기술을 적용한 선박 건조 생산성 제고는 물론 대규모 생산현장에 IT를 적용하는 제조IT 융합연구의 새로운 모델을 제시하였다는데 의미가 크다고 할 수 있다. A gigantic ship is constructed by assembling various types of ship blocks, each block being made by cutting and piecing the steel-plates together. The steel-plate piling process as the initial stage of ship construction sorts and manages the steel-plates according to the ship blocks that the steel-plates are used to make. The steel-plate piling process poses some problems such as process delay due to piling errors, safety vulnerability due to the handling of extra heavy-weight objects, and the uncertainty of work plan due to lack of information management in the pile spaces. We constructed a steel-plate piling process system based on the context-aware computing to resolve such problems. We built simulation system that can simulate the piling process and then established a smart space within the system by using tags, sensors and a real-time location system in order to collect context information. Workers receive an appropriate or intelligent service from the system.