http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Optical Feedback 방식에 의한 Laser Diode의 출력 안정화
정의진,이성은,강민호,Jeong, Ui-Jin,Lee, Seong-Eun,Gang, Min-Ho 대한전자공학회 1980 전자공학회지 Vol.17 No.6
본 논문에서는 optical feedback prebias control 회로상의 몇가지 일반적인 문제점들을 분석하고 이에 수반되는 회로 조정의 문제를 해결하기 위하여 LD simulation 회로를 제시하였다. 온도 시험에서 LD의 총 light power를 feedback loop에 사용하였을 때 0℃부터 36℃까지의 사이에서 1.5%의 light power 감소를 보였고 star coupler를 beam splitter로 1%정도를 분지, feedback loop에 사용한 결과 transmitter로서 좋은 전송 특성을 가짐을 관찰하였다. We analyze several problems concerning the operation of the optical feedback prebias control scheme in the loser diode optical transmitter and present a LD simulation circuit as a way of adjusting the component's optimum value without using the Laser - triode. 1.5% light power decrease was observed between the temperature range of $0^{\circ}C$ and 36$^{\circ}C$ in which the total light power of LD was used for feedback loop and fairly good operation was demonstrated when a star coupler was employed as a beamsplitter by which approximately 1% portion of the light power was feedbacked.
학생들의 역사 텍스트 읽기에서 나타난 상호텍스트성 분석
정의진 ( Jeong¸ Ui-jin ) 역사교육학회 2021 역사교육논집 Vol.78 No.-
This study shows how students read and understand historical texts on the basis of intertextuality. The students in this study wrote on the Independence Club(독립협회) and the act of dissolution by King of Gojong (고종). Most of them often relied on textbooks when writing. But some of them tended to use the internet for further, detailed information about topics, not referring to the books they had read, such a reliable source of knowledge. And they were rather attracted to the opinions opposing to what they had already known without cross-checking multiple sources. Most of the students recognized that each text they read adopts its own different perspectives or interpretations. But they failed to distinguish between the facts and the interpretations included in the texts. Some of them constructed their own narratives by filling the knowledge gaps with false information and even envisaged the aims and purposes of historical characters. A few of them were found just copying what a textbook says, or writing nothing, to clear up the confusion they were having. Most of the students, influenced by the social environment or context, interpreted the given topic with the frame of democracy versus dictatorship. Those who considered the direction of the Independence Club(독립협회) as democracy often claimed that democracy should be established. Also they believed that democracy is a natural condition for all human races. However, when seeing that democracy would be difficult to realize, some of them doubted and denied the possibility of democracy ironically. Even though the national curriculum, textbooks, and teachers’ classes were well structured, the students did not accept as intended.
이재준,임원종,정성범,정의진,박경진,Lee, Jae-Jun,Lim, Won-Jong,Jeong, Seong-Beom,Jung, Ui-Jin,Park, Gyung-Jin 한국전산구조공학회 2012 한국전산구조공학회논문집 Vol.25 No.1
모바일하버는 선박의 대형화로 인하여 항만에 접안 및 정박이 불가능하거나 선박의 접안 대기시간이 길어지는 경우 등 항만의 문제점들을 해결하기 위해 제시된 새로운 개념의 시스템이다. 이 새로운 시스템은 해상에 있는 선박에 다가간 후, 모바일하버에 설치된 크레인을 이용하여 선박에 컨테이너를 직접 상, 하역작업을 하도록 고안되었다. 모바일하버용 크레인은 컨테이너를 이송하는 장치로써 그 중요성이 매우 크다. 본 연구에서는 모바일하버용 크레인의 형태들을 제시하고 각 형태에 따른 구조최적설계를 실시하였다. 불안정한 해상으로부터 발생되는 횡동요 및 종동요와 바람에 의한 풍하중을 최적설계의 하중조건으로 하였다. 또 한국선급 및 각각의 규정들을 최적설계의 제한조건으로 하여 규정을 만족하면서 경량화된 크레인 구조를 최적화하였다. The mobile harbor is a new concept system to solve the problems of a port. These problems are that container ships cannot be anchored at the dock because they have become larger or the waiting times of anchoring the ships are increased due to heavy container traffic. A new system is designed to carry out the loading and unloading of containers between the mobile harbor and the container ship using the mobile harbor crane at sea. The crane plays an important role when transferring the containers. In this research, various types of the mobile harbor crane are proposed and structural optimization for each type of the crane is carried out. The loading conditions consider the rolling and pitching conditions of the unstable sea state and the wind force are considered. The constraints are mainly the regulations made by the Korean Register of Shipping. The structure of the crane is optimized to minimize the mass while various constraints are satisfied.
임원종(Won-Jong Lim),정의진(Ui-Jin Jung),정성범(Seong-Beom Jeong),이재준(Jae-Jun Lee),박경진(Gyung-Jin Park) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Recently, the container ships become fairly large so that the shipping capability is more than 10,000TED. Accordingly, very large ports are required and building such ports is extremely expensive. For this reason the mobile harbor concept has been proposed. The mobile harbor, which is located in a shallow sea, can replace a port that has insufficient infrastructure. Also, this system can alleviate congestion in the ports. The mobile harbor is a small container ship which has a container crane on it. The mobile harbor is a new innovative concept for moving containers from containership to a mobile harbor or vice versa. One of the most important basic technologies is the design of a crane structure for the mobile harbor. The crane for the mobile harbor is different from the conventional cranes on the ground. Stability is guaranteed on the ground, but is not so in the sea. This study examines structural optimization of the crane structure on the mobile harbor. The position of the boom of the crane is optimized as well. The design process considers the rolling and pitching conditions of the sea state and the wind force regulations from Korean Register of Shipping. Optimization problems are formulated to minimize the weight while various design conditions are satisfied, and the formulated problems are solved by a commercial software system called GENESIS.