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김기승(Kim, Gi-seung) 忠北大學校 中原文化硏究所 2010 중원문화연구 Vol.15 No.-
Shin Chae-Ho (literary name: Danjae) was an intellectual who devoted his life to Korean independence movement as a historian. His study on Korean was not merely scholastic one but practical activities for Korean independence. Therefore, his historical recognition had changed along with his recognition on the idea and methodology of Korean independence movement. The most famous works in which his historical view was expressed systematically are Doksa Sillon written in The Daehan maeil sinbo, in 1908 and History of Choseon (published later as Choseon Sanggosa in a separate volume) in Chosunilbo in 1931. The former reflects his historical recognition prior to 1910. The latter shows his historical point of views after the mid-1920s respectively. In addition, the Fierce Strife between two Dragons written in the late 1920s is a historical novel reflecting his independence movement line based on Direct Revolution by People. In this paper, historical recognitions in both Doksa Sillon and Chosun Sanggosa are compared, and the difference between them is investigated. It concerns with the meaning of a nation and national history. Danjae had shifted his historical recognition from historical viewpoint based on Social Darwinism, which supported the stronger, to that of revolutionary historical viewpoint, which advocated the weak people. Danjae’s historical novel The Fierce Strife between Two Dragons was written on historical viewpoint of people’s revolution. In the novel, the existing unified ruling class collapses under the ‘curse’ of the people, and the people’s world comes to emerge. Such a difference in the historical view kept pace with changes of Danjae’s independence movement. In other words, since 1910, Danjae had stopped his gradualism line of National Enlightenment Movement based on Social Darwinism, and pushed forward the line of direct revolution by people. Its change was meant that he focused on a violent struggle against imperialism and ruling classes on the people’s perspective. He defined history as a record of constant struggle between ‘I’ and ‘Non-I’ described in the general introduction of Chosun Sanggosa. His definition of history as a constant struggle is the expression about Direct Revolution by People. In this respect, the existing trend of research explaining that Danjae had solely had nationalistic historical viewpoint in the 1920s should be reexamined.
PSD를 이용한 플라스틱 박막 필름의 경사 각도 측정 시스템 개발
김기승(Gi-Seung Kim),박윤창(Yoon-Chang Park) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.2
스마트폰 등에서 사용되는 고성능 디스플레이에는 다양한 종류의 정밀한 플라스틱 박막 필름(Plastic Thin Film)이 사용되고 있다. 롤투롤(Roll-To-Roll) 공정으로 제조되는 플라스틱 박막 필름은 생산 공정 중에 실시간으로 필름의 두께가 계측되고, 정확하게 관리되어야 한다. 필름 제조 과정에서 필름에 장력이 작용하면서 주름이 발생되고, 이러한 주름 발생은 필름의 두께 방향과 두께 측정기의 광축이 서로 경사지게 한다. 결국 두께 측정기는 필름의 수직두께가 아닌 경사진 두께를 측정하게 됨으로써 실제 두께보다 더 큰 값으로 측정하게 된다. 본 연구에서는, 플라스틱 필름의 경사로 인하여 발생하게 되는 두께 측정기에서의 계측값 오차를 보정하기 위하여, 필름의 경사 각도를 계측하는 연구가 진행되었다. 플라스틱 필름에 슬릿 빔 레이저를 조사하고, 필름에서 반사되는 슬릿 빔 레이저가 PSD(Position Sensitive Device)에 맺히는 광학 시스템을 구성하였으며, 실험을 통하여 필름의 경사 각도와 PSD 출력값의 관계를 1차 방정식 형태로 구하였다. 이를 이용하여 필름의 경사 각도를 측정하는 장치가 구축되었으며, 250KHz의 속도로 경사 각도의 측정이 가능하였다. Various types of precision plastic thin films are used widely in high-performance displays, such as smartphones. For plastic thin-films manufactured by the Roll-to-Roll process, the film thickness must be measured and managed while moving. In the Roll-to-Roll process, wrinkles are generated when tension is applied to the film, which causes an inclination on the optical axis of the thickness gauge, resulting in a loss of accuracy. Therefore, this study attempted to develop an optical interference tomography measurement system. In this study, the tilt angle of the film was measured to correct the measurement value error in the thickness gauge caused by the tilt of the film. The system was constructed so that the laser was irradiated on the tilted film, and the laser reflected from the film was formed on the PSD. The relationship between the tilt angle of the film and the output value of the PSD was obtained experimentally. Using this, a device to measure the tilt angle of the film was constructed, and angle measurements were taken at a speed of 250,000Hz.
김기승(Kim Gi-Seung),김치조(Kim Chi-Jo),임관수(Lim Kwan-Soo),조용기(Cho Yong-Gee) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
It is extremely necessary to use such a secure way to transmit information to a train, which is needed for operating a train. In our system, The information including the allowable velocity of the train, train existence in current area, and other data necessary for operating train, is transmitted in the form of FM signal. Received by the receiver located on train, the signal is filtered, demodulated and analyzed to extract the original information. The analysis of the demodulated signal is done through FFT algorithm using sliding slot. These all are processed digitally by hardware which is implemented by 32bit DSP. The experiments show the validity of the algorithm we presented.
기당(幾堂) 현상윤(玄相允) 선생(先生) 전집(全集) 출간(出刊) 기념(紀念) 기당(幾堂) 현상윤(玄相允) 선생(先生)의 학문(學問)과 사상(思想) 현상윤과 3.1운동
김기승 ( Gi Seung Kim ) 한국공자학회 2008 공자학 Vol.15 No.-
Hyun Sang-Yoon, a teacher in Bosung School, was one of the key persons in the March First Movement. However the historical studies on his independence movement have not done much. The historical studies of the March First declaration of Korean independence were focused on the thirty three representatives, who signed the manifesto. Hyun Sang-Yoon was not the one of the thirty three representatives. His mission was one of the second leader group, who planned and led the March First Movement from behind. This study deals with his real role in the Mrch First declaration of Korean independence. He gave aid to the Korean students in Tokyo, who declared the Korean independence at 8th, February in 1919. Their declaration of Korean independence ha influence on the March First Movement in their homeland. He was the first man, who met Son Gye-Baek, a messenger of Korean students in Tokyo, and communicated the fact to the Chundogyo leaders such as Choi Rin, Kwon Dong-Jin, Oh Se-Chang and Son Byung-Hee. The March First Movement was planned and led by the religious leaders. Chundogyo, Christianity and Buddism were the big and influential organization in Japanese colonial period. These three powerful religious group joined one another for the Korean independence declaration against Japanese colonial rule. Hyun Sang-Yoon and Choi Nam-Sun communicated the Chundogyo leaders` plan of Korean independence movement to the Lee Seung Hoon, who was the influential leader of the Korean Christianity. By Hyun and Choi`s truly patriotic mediation, the cooperation between the Chundogyo leaders and the Christianity leaders was possible. Hyun Sang-Yoon wrote his memories of the March First Movement in 1946. His momories are vivid and real, so they have important historical value. The official records by Japanese colonialism do not say the facts which Korean independence leaders did not want to open to public for the fulfillment of independence movement and their friends` safe. This means that his memories have the importance as the historical evidence on the March First movement.
김기승(Gi-Seung Kim),박윤창(Yoon-Chang Park) 한국산학기술학회 2019 한국산학기술학회논문지 Vol.20 No.6
삼차원 형상 측정 기술은 다양한 산업에서 활용하고 있는 기술이다. 그 중, 광 삼각법에 기초한 광학식 삼차원 형상 측정 기술들은 매일 공장에서 오랜 시간 동안 대량의 삼차원 형상 측정을 하고, 미세한 측정 또한 요구되는 반도체 생산품 검사 분야에서 주로 사용된다. 이러한 광 삼각법 기반의 삼차원 측정 장비들의 구성 요소인 광원과 구동 회로는 장시간 작동하게 되면 발열이 나타나게 되고 장시간 작동하며 주변의 온도가 일정하지 않은 상황에 노출되기도 하여 온도로 인한 측정 오차가 발생하게 된다. 본 논문에서는 장시간 반복해서 사용하는 PMP(Phase Measuring Profilometry) 형상 측정법에서의 열 변위 보정에 관한 방법을 제안하였다. PMP 형상 측정법 기반의 삼차원 형상 측정 장치를 구현하여 10시간에 걸쳐 물체의 높이와 주변 온도를 측정하는 실험을 진행하였고, 측정된 온도와 높이 값을 이용하여 단순 선형 회귀 분석을 하여 회귀직선을 얻었다. 이 회귀직선을 이용하여 온도에 따른 높이 측정값의 오차를 보정하게 되면 정상적인 측정값에서의 오차 값이 139.88 um(Micrometer) 에서 13.12 um로 보정되는 것을 확인하였다. Three-dimensional shape measurement technology is used in various industries. Among them, optical three-dimensional shape measurement techniques based on the optical trigonometry are mainly used in the field of semiconductor product inspection, where large quantities of three-dimensional shape measurements are made daily in factories and fine measurements are also required. The light source and the drive circuit, which are components of three-dimensional measurement equipment based on this optical trigonometry, produce heat generated by prolonged operation, and may be exposed to conditions where the ambient temperature is not constant, resulting in temperature-induced measurement errors. In this study, the compensation method of the Thermal Errors for Phase Measuring Profilometry is proposed. Three-Dimensional Shape Measurement Equipment based on Phase Measuring Profilometry is implemented to measure the height of an object and ambient temperature for 10 Hours, and a regression line was obtained line by making simple linear regression using measured temperature and height values. This regression line was used to correct the error of the height measurement according to the temperature, and thermal error was from 139.88 um(Micrometer) to 13.12 um.