http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 김동건 ( Dong-geon Kim ) (검색결과 114 건)
- 무료
- 기관 내 무료
- 유료
-
기상 상태 변화에 따른 직육면체의 재질별 표면온도 변화 특성에 대한 실험 연구
김동건,최준혁,길태준,김정호,김태국,Kim, Dong-Geon,Choi, Jun-Hyuk,Kil, Tae-Jun,Kim, Jung-Ho,Kim, Tae-Kuk 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.2
The spectral radiance received by a remote sensor is consisted of the self-emitted component directly from the target surface, the reflected component of the solar irradiance at the target surface, and the scattered component by the atmosphere without ever reaching the object surface. In general, the self-emitted component is the most important part in the infrared signatures from the target. We measured the solar irradiation, sky irradiation, air temperature, wind velocity, wind direction, relative humidity, and atmospheric pressure together with the surface temperatures of rectangular parallelepiped targets. The measured diurnal surface temperature variations on the three different rectangular parallelepiped targets constructed by the steel, aluminum and bakelite are obtained at the same time intervals. The measured surface temperature results show that the top surface temperature of bakelite recorded up tp $7.6^{\circ}C$ higher than that of aluminium and $6.1^{\circ}C$ higher than that of steel at 11 AM on the sunny condition. A complete set of measured data including the surface temperature of rectangular parallelepiped targets together with the detailed weather information can be a valuable reference for future study.
-
위성용 전개형 고안정 반사판 안테나 복합재 주반사판 설계 및 해석
김동건,구경래,김현국,송성찬,권성철,임재혁,김영배,Dong-Geon Kim,Kyung-Rae Koo,Hyun-Guk Kim,Sung-Chan Song,Seong-Cheol Kwon,Jae-Hyuk Lim,Young-Bae Kim 한국복합재료학회 2023 Composites research Vol.36 No.3
The deployable reflector antenna consists of 24 unit main reflectors, and is mounted on a launch vehicle in a folded state. This satellite reaches the operating orbit and the antenna of satellite is deployed, and performs a mission. The deployable reflector antenna has the advantage of reduce the storage volume of payload of launch vehicle, allowing large space structures to be mounted in the limited storage space of the launch vehicle. In this paper, structural analysis was performed on the main reflector constituting the deployable reflector antenna, and through this, the initial conceptual design was performed. Lightweight composite main reflector was designed by applying a carbon fiber composite and honeycomb core. The laminate pattern and shape were selected as design variables and a design that satisfies the operation conditions was derived. Then, the performance of the lightweight composite reflector antenna was analyzed by performing detailed structural analysis on modal analysis, quasi-static, thermal gradient, and dynamic behavior.
-
-
-
BRDF를 고려한 적외선 신호의 반사 성분 고속 연산기법에 관한 연구
김동건,한국일,최준혁,최순호,김태국,Kim, Dong-Geon,Han, Kuk-Il,Choi, Jun-Hyuk,Choi, Soon-Ho,Kim, Tae-Kuk 한국군사과학기술학회 2017 한국군사과학기술학회지 Vol.20 No.1
This paper is a part of developing a computer code that can be used to generate synthetic IR images by calculating the outgoing infrared signal from objects. To predict the reflected component that is a part of the outgoing IR signal, such as those components reflected from the target surface by the solar and sky irradiations, it is necessary to calculate the complicated BRDF values for considering the directional surface reflection characteristics. Since the calculation of reflectance using the BRDF requires a large amount of computation time due to the hemispherical integral term, it is frequently restricted in applying for a real-time prediction of IR signal. In this research, the simplified method for calculating IR reflected component has been proposed by replacing the integral terms into two parts, a directionally uniform component and a step function representing the specular component, to reduce computation time. The proposed method is proved to result in very fast calculation of the BRDF (up to 600 times faster calculations) for most of the surfaces with minimal loss of the accuracy.
-
김동건,Kim, Dong-Geon 한국건강관리협회 1996 건강소식 Vol.20 No.9
각종 공해로 인한 오존층의 파괴와 더불어 피부에 생기는 암에 대한 관심이 높아지고 있다. 피부암은 크게 양성종양과 악성종양으로 나눌수 있는데, 본 글에서는 대표적인 피부악성종양인 기저세포암, 편평세포암, 그리고 악성흑색종에 관하여, 각각의 원인(특히 태양광선과의 관계), 증상. 치료방법 및 예방법 등을 알아보고자 한다.
-
-
-
-
KISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
