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정창현,홍태호,박계각,박영수,Jung, Chang-Hyun,Hong, Tae-Ho,Park, Gyei-Kark,Park, Young-Soo 해양환경안전학회 2013 해양환경안전학회지 Vol.19 No.1
가까운 거리에서 상대선과의 마주치는 상황 또는 교차된 상황에서 상호 피항동작을 취하게 되는데, 상대선박의 변침의도를 정확히 파악하지 못해 서로 같은 방향으로 피항동작을 취함으로써 충돌위험에 처하게 되기도 한다. 항해사는 피항동작을 취함에 있어 시각에 의한 판단, 레이더 또는 AIS 벡터를 이용한 판단, 또는 VHF 통신을 활용하여 피항동작을 취하고 있으나, 레이더 및 AIS를 이용한 기존의 방식은 선박이 선회 후 선수방위가 표시되기 때문에 선회를 탐지하기까지는 상당한 시간이 요구된다. 따라서 조타기 작동 신호를 상대선박에 신속하게 전달하여 상대선의 선회의도를 보다 신속히 판단할 수 있는 선회조기감지 방안을 제안하였다. 이러한 방법은 상대선의 변침의도를 보다 신속하게 파악함으로써 선박 상호간 충돌예방에 효과적이며, VTS 시스템 및 해양사고 분석에서 활용이 가능하다. If we were in a head-on or crossing situation with a target ship and did not know the target ship's intention to change her course, we might be confused about our decision making to change our course for collision avoidance and be in a danger of collision. In order to solve these problems, we need to develop an automatic system which enables mariners to easily detect a change in the target ship's course and efficiently avoid being on a collision course. In this paper, we proposed an early detection method on altering course of a target ship using the steering wheel signal. This method will contribute to the reduction of collision accidents and also be used to the VTS system and the analysis of marine accidents.
정창현(C. H. Jung),김원경(W. K. Kim),박배훈(B. H. Park),류희찬(H. C. Lew),신현용(H. Y. Shin),이재학(J. H. Lee),전평국(P. K. Jeon),구광조(K. J. Koo) 대한수학교육학회 1994 수학교육학연구 Vol.4 No.1
Ⅱ. 국내 연수 기관의 연수 내용 및 방법 분석 Ⅲ. 우리나라 수학교사 재교육의 문제점 Ⅳ. 연수 내용 및 방법의 개선책 Ⅵ. 요약 및 제언 참고 문헌
A Study on the Development of an Early Detection System for Altering Course of a Target Ship
정창현,박영수,윤대근,최명식,Jung, Chang-Hyun,Park, Young-Soo,Yoon, Dae-Gwun,Choi, Myung-Sik The Korean Society of Marine Environment and safet 2016 해양환경안전학회지 Vol.22 No.6
본 논문에서는 조타기 작동 신호에 대하여 AIS 통신을 이용하여 상호 교환함으로써 상대선의 선회정보를 보다 신속히 파악할 수 있는 선회조기감지시스템을 구축하였으며, 이를 실선에 적용하여 해당 시스템의 실효성을 검증하였다. 조타 신호가 조타기를 작동함과 동시에 AIS를 통하여 송신되어 상대선의 ECDIS에 사용된 타각만큼 유색으로 표시되는 것을 확인하였다. 선회조기감지시스템을 통하여 상대선의 변침 상황을 조기에 감지할 수 있었으며, 이를 통한 선박 상호간 충돌회피가 조기에 가능할 것으로 판단된다. 또한, 의심 선박에 대한 VTS의 적극적 관제가 가능하고, 해양안전종합정보시스템을 통한 해양사고 분석에도 활용 가능할 것이다. This paper contributes to the development of an early detection system to detect the alteration of a target ship during early stages using the steering wheel signal via AIS communication. The feasibility of this system is also verified with a real ship trial. It was confirmed that the rudder angle on ECDIS was ordinarily marked green or red by the used rudder angle after the steering wheel operation. We were able to detect intentions for a change in course by a target ship quickly and efficiently avoid collisions. This system will contribute to more active VTS services and the analysis of marine accidents using the General Information Center On Maritime Safety & Security (GICOMS).
뇌졸중 쥐 모델에서 인간 제대혈 유래 중간엽줄기세포의 치료 효과 연구
정창현 ( Chang Hyun Jeong ),임정연 ( Jung Yeon Lim ),박상인 ( Sang In Park ),김성묵 ( Seong Muk Kim ),전진애 ( Jin Ae Jun ),오원일 ( Won Il Oh ),이재권 ( Jae Kwon Lee ),전신수 ( Shin Soo Jeun ) 한국조직공학과 재생의학회 2006 조직공학과 재생의학 Vol.3 No.4
Mesenchymal stem cells(MSCs) have the ability to differentiate into multiple cell types. It has been reported that MSCs ameliorate functional deficits after transplantation into various neurologic disease models. In this study, to demonstrate the effect of human umbilical cord blood-derived MSCs(hUCB-MSCs) on stroke models, we transplanted the PKH-26 labeled hUCB-MSCs into the contralateral region of injured rat brain at 7 days after injury, and then examined the behavioral test, migration ability of transplanted hUCB-MSCs to injury site, and differentiation potentiality of transplanted hUCB-MSCs into neural cells. The results were: (1) a behavioral test(adhesive- removal and rotarod test) showed a significant improvement in the MSCs transplanted group as compared to the PBS injected group, (2) PKH-26 labeled MSCs were detected in the boundary zone of injured site at 4 weeks after transplantation, and (3) a few of transplanted MSCs exhibited a labeling for mature neural linage markers NeuN and GFAP. We suggest that hUCB-MSCs could be an effective cell source for treating ischemic brain injury.
『東醫壽世保元』 少陰人 表病의 益氣 및 升陽 治法에 대한 考察
Park Su-hyun(朴修玄),Jeong Chang-hyun(丁彰炫),Baik You-shang(白裕相),Jang Woo-chang(張祐彰) 대한한의학원전학회 2009 대한한의학원전학회지 Vol.22 No.2
『Dong-uisusebowon(『東醫壽世保元』)』, written by Ijema(李濟馬), is about the treatment and prevention of diseases according to the four constitutions, Soeum, Soyang, Taeeum and Taeyang. He presents a precise pathogenic mechanism along with specific treatment methods of the Ulgwang(鬱狂) Syndrome which are Seungbo(升補) and Ikgiseung-yang[益氣而升陽] in comparing Mang-yang(亡陽) and Ulgwang Syndromes. However, in the case of the Mang-yang Syndrome, he merely presents formulas without mentioning details of the treatment methods. In this study, the formulas of the Mang-yang Syndrome and Ulgwang Syndrome were thoroughly compared and analyzed, leading to the conclusion that the concept of the Ikgi(益氣) method matches that of the Bojung-ikgitang(補中益氣湯) of Idongwon(李東垣), consisted of ingredients such as Ginseng, Radix Astragali, Radix Angelicae Gigantis, Rhizoma Atractylodis Macrocephalae etc,, and the concept of Seung-yang matches that of Gyejitang(桂枝湯). Furthermore, we have examined the addition of Radix Aconti Lateralis Preparata[附子] to the Ikgiseung-yang[益氣而升陽] method to be aimed at restoring the Yanggi(陽氣). Lastly, through comparison of formulas according to the progress of the Mang-yang Syndrome and Ulgwang Syndrome, we have presented a more detailed explanation of the concept of each treatment methods: the Mang-yang Syndrome focuses more on Seung-yang(升陽), Ulgwang leans more towards Ikgi(益氣).