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PDA 및 GPS를 이용한 옥외 작업장 블록 위치 추적 시스템 개발
이장현,신종계 대한조선학회 2006 大韓造船學會 論文集 Vol.43 No.1
There are hundreds of ship blocks which are under the block assembly, painting, and outfitting assembly works in the pre-erection shops of shipyard. Generally, each block is planned to be processed in a pre-erection shop according to the block type by the long-term production-scheduling before six months. However, many blocks can't be processed in the planned time and the planned shop since the before and after block-processing changes or delays the planned sequential works in pre-erection shops. Therefore, it is essential to monitor the current location of each block and work in process to cope with the changed situation of pre-erection shops. Present study integrates PDA, GPS, and CDMA to chase the location of each block, to exchange the pre-erection work order and the work report between the production-scheduling server and the production managers in the pre-erection shops. This study shows a prototype for the block tracing and process monitoring in the pre-erection shops.
李璋鉉 계명대출판부 1979 童山申泰植博士古稀紀念論叢 Vol.S No.-
社會統制의 諸 過程에서 편파적이고 불평등한 취급을 받는 一部 下流層의 靑少年들은 「共通의 문제」를 해결하기 위하여 集團的인 非行에 참여할 가능성이 크다고 봐야 할 것이다. 따라서 集團非行에 관한 종래의 社會學的 理論은 非行을 統制하고 예방하려는 社會統制的 努力 자체가 그러한 行爲를 사실상 유발하고 지속시키고 있다는 점을 망각하고 있는 결함을 갖고 있다. 결론적으로, 앞에서 고찰한 理論들은 슬럼적인 생활환경에 대한 靑小年들의 자의적인 反應과 集團非行의 발생과 지속에 기여하는 社會統制的 要因을 體系的으로 고려할 때보다 더 現實 有關的인 理論으로 발전할 수 있지 않을까 한다.
李璋鉉 弘益大學校 東西文化硏究所 1995 東西文化硏究 Vol.3 No.-
(Abstract) This study is designed to find out how Korean college students think about North Korean society in general as well as North Korean regime. To summarize, the results of this study are as follows. 1. More than half of the respondents say that the Kim Jung-il and Kim IL-sung idolization policy of North Korean regime is what they have in mind whenever they think of North Korea. 2. About half of the respondents think that the rates of both divorce and crime as well as inter-generational conflict in North Korea are considerably lower than those of South Korea. 3. The majority of the respondents believe that there is no freedom as to travel, residential choice as well as press in North Korea. 4. The majority of the respondents say that in North Korea the Kim Jung-il and Kim il-sung's instructions are rankeed higher than North Korean Consititution 5. About half of the respondent believe that Kim Il-sung is just the person who failed in successively carrying out the economic development of North Korea because of his desire to preserve the North Korean Communist regime 6. With regard to how they evaluate Jue-Chai ideology, more than half of the respondents reply that there is something valuable which they have to learn from Jue-Chai ideology. 7. With regard to why North Korean regime is reluctant to carry out the open foreign policy, the majority of the respondents seem to be assured that the only reason is that if North Korean regime carry out the open policy, it will be a tremendous threat to the North Korean regime itself. 8. As to the question whether or not the North Korean regime will eventually be destroyed, the magority of the respondents feel that the North Korea regime will eventnally stop to exist. It should be kept in mind, however, since the results of this study have been obtaind from 425 college students of a particular university in seoul, the results can not be generalized to the Korean college students in general.
아세토니트릴 용매에서 벤젠술폰산파라-니트로벤질과 치환 아닐린간의 친핵성 치환반응에 관한 온도효과
이장현 평택대학교 1997 論文集 Vol.9 No.2
아세토니트릴 용매에서 치환된 벤젠술폰산 파라-니트로벤질과 치환된 아닐린간의 친핵성 치환 반응을 반응온도 35.0℃, 45.0℃, 55.0℃에서 속도론적으로 연구하였다. 치환기 효과 및 반응온도 변화에 따른 전이상태 구조변화를 Hammett식(ρi)으로부터 논의하였다. Hammett 값(ρi)은 반응온도가 증가함에 따라 감소하는 현상을 보임으로써 reactivity-selectivity principle에 잘 적용함을 알 수 있었고, 기질과 친핵체 사이의 결합 형성보다는 기질과 이탈기 사이의 결합파괴가 더 진전되는 dissociative SN2 반응임을 알 수 있었다. The nucleophilic substitution reaction of p-nitrobenzyl benzensulfonates with substituted aniline is studied kinetically in acetonitrile at 35.0℃, 45.0℃, and 55℃ and the transition state(ts) structure variation with substituent effects and temperature effects are discussed based on the Simple Hammett's coefficient(ρi). The ρi values are found to decrease with increasing temperature. The results are in agreement with the reactivity-selectivity principle. It is found that the reaction proceed via dissociative SN2 mechanism in which the bond-breaking is advanced than the bond formation.
선박해양 구조물의 배관 자재 관리를 위한 Enterprise BOM 의 설계와 구현 사례
이장현(Lee, Jang Hyun),김승현(Kim, Seung Hyun),이황범(Lee, Hwang Beom),장기삼(Jang, Gi Sam) (사)한국CDE학회 2010 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2010 No.1
Both enterprise information systems and CAD utilizes the BOM (Bill of Material) as the means of collaborative integration during the product design and production since the BOM has been commonly used for design, production planning, procurement, and production works. Therefore, BOM can be the referential data when it expresses not only the part lists but also product information required by product development process. Outfitting design is one of major design works in marine vessel design since marine vessels have various outfitting systems and huge number of parts. Also, the outfitting BOM has the evolutional forms that change from the initial design to the production design. In order to express the product information and part list in the enterprise BOM and the evolutional BOMs in each lifecycles, enterprise BOM of outfitting that consists of structure BOM and display BOM is suggested. Thereafter, we have developed the prototype of enterprise BOM in which some features of the outfitting BOM are implemented.