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- 저자 : 최동혁 ( Donghyuk Choi ) (검색결과 29 건)
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최동혁,안지연,김유범,손중탁,이욱준,박현수,Choi, Donghyuk,An, Jiyeon,Kim, Yubeom,Son, Joongtak,Lee, Ukjun,Park, Hyunsoo 한국군사과학기술학회 2021 한국군사과학기술학회지 Vol.24 No.5
This paper presents a system that measures the acceleration of the shock caused by the explosion of the precursor warhead for the tandem projectile. The proposed system, which is implemented based on the MIL-STD-810G, Method 517.1, consists of a miniaturized shock measurement device, a cable, accelerometers, and a trigger circuit. The shock measurement device has a size of ¢102 × 171 mm and cable has a length of 3 m. The operational confirmation test is conducted by implementing the measurement system. The Analysis of shock data(accelerometer output data) is carried out using Shock Response Spectrum(SRS), pseudo velocity and plot of acceleration time transient. Through measurement analysis, one can predict the damage of electronics in projectile when precursor warhead is exploded.
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SF영화 속 가상공간의 특징에 대한 연구 - 앙드레 바쟁의 영화 존재론을 중심으로 -
겅허치,최동혁,Geng, Heqi,Choi, Donghyuk 한국멀티미디어학회 2022 멀티미디어학회논문지 Vol.25 No.9
In the display of virtual space, the degree of space virtualization cannot be judged only by the degree of material technology. Based on the non-material relationship, the virtual space that this research focuses on is a conceptual and ontological point of view (based on the conceptual and ontological viewpoints of non-material relations), including practical technical issues. The research on the characteristics of virtual space ontology not only has an impact on the space design of science fiction movies, but also becomes a powerful medium that brings changes to the world. In the future, there will be a large number of cases where fantasy things in science fiction movies are actualized. From this perspective, based on the study of several science fiction movies using virtual reality scenes, this paper puts forward a study on the representation characteristics of virtual space ontology. In addition, the study of the virtual reality is of great significance for verifying the possibility of virtual reality in the application of deep space technology in the future. At the same time, it provides reference value for the development of special effects film field from montage theory-based to Bazin theory-based expression, and contributes to the theoretical system of film space.
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L-THIA를 이용한 낙동강수계 임하댐유역 비점오염원의 공간적 분포해석
전지홍,다니엘차,최동혁,김태동,Jeon, Ji-Hong,Cha, Daniel K.,Choi, Donghyuk,Kim, Tae-Dong 한국농공학회 2013 한국농공학회논문집 Vol.55 No.1
Long-Term Hydrologic Impact Assessment (L-THIA) model which is a distributed watershed model was applied to analyze the spatial distribution of surface runoff and nonpoint source pollutant loading from Imha watershed during 2001~2010. L-THIA CN Calibration Tool linked with SCE-UA was developed to calibrate surface runoff automatically. Calibration (2001~2005) and validation (2006~2010) of monthly surface runoff were represented as 'very good' model performance showing 0.91 for calibration and 0.89 for validation as Nash-Sutcliffe (NS) values. Average annual surface runoff from Imha watershed was 218.4 mm and Banbyun subwatershed was much more than other watersheds due to poor hydrologic condition. Average annual nonpoint source pollutant loading from Imha wateshed were 2,295 ton/year for $BOD_5$, 14,752 ton/year for SS, 358 ton/year for T-N, and 79 ton/year for T-P. Amount of pollutant loading and pollutant loading rates from Banbyun watershed were much higher than other watersheds. As results of analysis of loading rate from grid size ($30m{\times}30m$), most of high 10 % of loading rate were generated from upland. Therefore, major hot spot area to manage nonpoint source pollution in Imha watershed is the combination of upland and Banbyun subwatershed. L-THIA model is easy to use and prepare input file and useful tool to manage nonpoint source pollution at screening level.
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애니메이션에서 표현된 중국의 전통의상 색채에 관한 분석
샤오하이리(Xiaohaili),최동혁(Choi, Donghyuk) 한국색채학회 2016 한국색채학회 논문집 Vol.30 No.3
Interests in Chinese traditional culture are absorbed as ripple effect in movies and the movies are distributed all around world through reinterpretation and reinvention. Based on this phenomenon, this study is to examine how the reinterpreted Chinese traditional character images are reflected and processed through analyzing colors applied to traditional characters in Chinese animations. The scope adopted in this study is restricted to main character images in 〈Monkey King: Hero is Back (大聖歸來, 2015)〉, an animation that is highly popular and widely accepted of all ages in China. This study first reviews literatures to examine character colors" images and symbolic meanings and to theoretically look into the definition of Hanfu (漢服) culture. Second, it draws features of main characters" image color in this animation and analyzes harmony in characters" colors. Analysis on color images" scale and colors" symbolic meanings is conducted upon characters with their own Hanfu colors in 〈Monkey King: Hero is Back〉. Character in 〈Monkey King: Hero is Back〉 subject to the analysis: 1) Before unsealing, Son Goku (孫悟空) consists of sky-blue, brown, beige and deep blue. The meaning of harmony in Son Goku"s colors is depression, strong potential, hope, the earth, soil, loneliness, lonesomeness, invincible spirit and hero. 2) After unsealing, Son Goku consists of chestnut, red, yellow and black. The meaning of harmony in Son Goku"s colors is tenacity, energy, strength, hope, peace, hero and desire. 3) In the process that chaotic light purple and dark image of deep purple changed into violet, the devil"s symbol, the devil character comes to be created. 4) Jiang Liu Er (江流兒) is with grayish blue outerwear and brown pants. It shows an image of passionate and bright young Buddhist monk. This thesis interprets colors" symbolic meanings through tones of animation characters and analyzes various colors of main characters in 〈Monkey King: Hero is Back〉 to examine effects of traditional characters" design on the characters" setting and the animation piece in a Chinese animation. This research result provides an opportunity to suggest a significant direction in future development of character design in diverse animations and it would serve as a constructive and meaningful research in the rising Chinese animation industry.
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황칭(Huangqing),최동혁(Choi, Donghyuk) 한국색채학회 2016 한국색채학회 논문집 Vol.30 No.3
The shape of God Nezha(哪吒) originates in Buddhism and artistic shapes of racial particularity were born through artistic creation of Shenmoxiaoshuo(神魔小說, God- and Devil-themed novel). Figures in the movie are artfully integrated by taking nourishment both from our new year"s pictures and characters in play and the Figures" personality is expressed with exaggeration.The design for animated shape of Nezha is to be studied through comparison and analysis on Nezha expressed in various animations. This study selects a representative Chinese animation 〈Nezha Conquers the Dragon King(哪吒鬧海)〉 to analyze features of the character Nezha. Starting with roles in the representative Chinese animation 〈Nezha Conquers the Dragon King〉, this study analyzed a range of perspectives including techniques for modeling, color, theme and contents and it found the animation"s features and design expressions and at the same time, with plenty of cases, it also analyzed features of Nezha in different types of animations to identify problems faced by Chinese animation and to seek effective solutions for them.Based on the procedure above, this study will help to understand design features of Nezha and causes of its creation and will be utilized as key research result for future development of Nezha animation character design.
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애니메이션과 영화에서 표현된 한푸(漢服) 색채 표현 비교 분석
샤오하이리(Xiao, Haili),최동혁(Choi, Donghyuk) 한국색채학회 2017 한국색채학회 논문집 Vol.31 No.1
As to analyzing differences that can be caused between animation and live-action film. This paper focused on the colors of Hanfu (漢服, traditional Chinese clothes) which can be found in the characters’ clothes. It is very important to identify the core of design or symbol first and then highlight. Otherwise, it will be expanded to keep the material’s original form because the same materials require different expression methods. The scope of this study is restricted to the colors captured from images of characters both in the animation Mulan (1998) and the live-action film Mulan (2009). In the research, the symbolic meanings of colors; first, definition of Hanfu and symbol of colors have theoretically examined through literature review. Second, a comparative analysis has been conducted upon differences between animation and live-action film. The Values of Hue, Value and Chroma have extracted directly from Hanfu colors of characters in the animation Mulan (1998) and the live-action film Mulan (2009) by using dropping pipette method. Also, another set of comparative analysis have been conducted for symbolic meaning of Hanfu colors on characters in the captured images. The result of this study has been identified the differences between expression methods of colors in different media based on the same or similar materials. In addition, it is expected to be a significant data to seek expansion for various expression methods and contents.
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L-THIA를 이용한 길안유역 비점오염원의 공간적 분포 모의
전지홍 ( Jeon Ji-hong ),최동혁 ( Choi Donghyuk ),김태동 ( Kim Taedong ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-
In this study, Long-Therm Hydrologic Impact Assessment (L-THIA) was applied at Gilan watershed located in Nackdong River Basin to analyzed spatial distribution of nonpoint source pollution. L-THIA employs CN method and EMCs coefficients to estimate surface runoff and non pointsource pollution. For the calibration of surface runoff, CN was optimized by SCE-UA technique which is one of the global optimization method and widely used to automatic calibration of hydrologic model. The results of model calibration based on observed data during 1991-2000 represented high model efficient with showing 0.66 of Nash-Sutcliff Coefficient (NSC). During the validation period (1981-1990), simulated monthly results is well matched with observed monthly runoff with showing 0.73. Therefore, calibrated L-THIA model can simulate well the hydrologic condition of Giland watershed. Based on calibrated CN value, L-THIA simulate average yearly surface runoff and nonpoint source pollution for 30years.
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