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장원,정명진,변증남,Jang, Won,Chung, Myung-Jin,Bien, Zeung-Nam 대한전자공학회 1990 전자공학회논문지 Vol. No.
본 논문에서는 시각정보에 의하여 로봇을 제어하기위해 영상으로부터 추출되는 feature를 이용하는 한 방법을 제안한다. 특별히 feature에 대한 수학적인 정의를 제안하였으며 로봇의 움직임과 feature vector의 미소한 변화 사이의 관계를 기술하였다. 이 과정에서 feature jacobian matrix와 그의 gene-ralized inverse가 사용되었다. 로봇 자유도의 수보다 많은 feature를 사용하면 visual servoing의 성능을 향상시킬 수 있었다. 여러 예를 통하여, 본 논문에서 제안된 방법이 유효함을 보였다. This paper proposes a method of using image features in serving a robot manipulator. Specifically, the con-cept 'feature' is first mathematically defined and then differential relationship between the robot motion and feature vector is derived in terms of Feature Jacobian Matrix and its generalized inverse. Also, by using more features than the number of DOFs of the robot, the visual servoing performance is shown to be improv-ed. Via various examples, the method of feature-based servoing of a robot proposed in this paper is proved to be effective for conducting object-oriented robotic tasks.
장원,이정민,이상민,한준구 대한영상의학회 2017 Korean Journal of Radiology Vol.18 No.2
Objective: To evaluate the feasibility, efficiency, and safety of no-touch switching bipolar (SB) and switching monopolar (SM) radiofrequency ablation (RFA) using ex vivo bovine livers. Materials and Methods: A pork loin cube was inserted as a tumor mimicker in the bovine liver block; RFA was performed using the no-touch technique in the SM (group A1; 10 minutes, n = 10, group A2; 15 minutes, n = 10) and SB (group B; 10 minutes, n = 10) modes. The groups were compared based on the creation of confluent necrosis with sufficient safety margins, the dimensions, and distance between the electrode and ablation zone margin (DEM). To evaluate safety, small bowel loops were placed above the liver surface and 30 additional ablations were performed in the same groups. Results: Confluent necroses with sufficient safety margins were created in all specimens. SM RFA created significantly larger volumes of ablation compared to SB RFA (all p < 0.001). The DEM of group B was significantly lower than those of groups A1 and A2 (all p < 0.001). Although thermal injury to the small bowel was noted in 90%, 100%, and 30% of the cases in groups A1, A2, and B, respectively, full depth injury was noted only in 60% of group A2 cases. Conclusion: The no-touch RFA technique is feasible in both the SB and SM modes; however, SB RFA appears to be more advantageous compared to SM RFA in the creation of an ablation zone while avoiding the unnecessary creation of an adjacent parenchymal ablation zone or adjacent small bowel injuries.
대중매체 속에서의 미술작품 해석과 서술에 대한 고찰: 소설과 영화 <다 빈치 코드>에 나타난 레오나르도 다 빈치의 작품들을 중심으로
장원 한국영상문화학회 2019 영상문화 Vol.0 No.34
At the quincentenary of Leonardo da Vinci's death this year, he needs to be re-evaluated more than as an artist we would usually think: as an inventor, militarist, armorer, anatomist, botanist, astronomer, musician, cook as he recognized himself. In fact, Leonardo had performed his creation in extensive fields. It is simply proved with his enormous records and sketches in comparison to his completed paintings less than 20 works. Particularly, through his entire life, Leonardo devoted himself to the investigation of many areas in natural science, and attempted to figure out the mystery of human body and life with modern scientific mind and attitude. Insisting confrontational claims against academic results in art historical discipline, however, Dan Brown's worldly best-selling novel and movie, The Da Vinci Code, interprets Leonardo's works as antichristianism. Art works of the past, I believe, should be examined and clarified in the basis on accurate sources and facts. At the 500 anniversary years after Leonardo da Vinci's death, I feel an obligation to research and clarify the genuine facts around art. Since the author’s brand new interpretations on Leonardo’s works are due to the different suggestions of their backgrounds, there are numerous books published to confute the religious faults. Therefore, this research focuses on comparing Brown’s alleged claims with the “canonical” interpretations of art by reputable art historians. By cracking details of what Brown stated, this study is expected to reach the truths and to serve to those who want to enjoy the genuine truths in art and literature. 올해로 서거 500주년을 맞이하는 레오나르도 다 빈치(1452-1519)는 이탈리아 르네상스를 대표하는 예술가로 흔히 잘 알려져 있다. 그런데 사 실 그는 우리가 지금 생각하는 예술가라기보다는 발명가, 군사전문가, 무 기제조자, 해부학자, 식물학자, 천문학자, 음악가, 요리사 등 실로 광범위 한 영역에서 창의적인 활동을 벌인 일종의 근대적 선각자라고 스스로에 대해 생각하고 있었다. 그의 방대한 기록들과 스케치는, 20여 점이 채 되 지도 않는 그의 회화 완성작과 비교해보더라도 이 점을 충분히 증명해준 다. 레오나르도는 특히 평생에 걸쳐 자연과학의 여러 분야에 관심을 가지 고 연구에 깊이 몰두했으며, 인체와 생명의 신비에 대해서도 근대의 과학 적 태도로 접근하고 규명하려고 노력했다. 그런데 소설 다 빈치 코드는 레오나르도의 작품을 반기독교적 도상으로 해석하며, 기존의 미술사 서술 과는 대치되는 주장을 펼친다. 이와 관련된 여러 분야에서 소설의 오류들 을 반박해왔으나, 본 연구에서는 소설이 다루는 주요 작품 중에서 ≪비트 루비우스의 인체비례≫가 갖는 근대과학의 의미와 더불어, ≪모나리자≫ 와 ≪최후의 만찬≫의 도상과 의미 규명을 통해 그의 작품들이 지닌 미술 사적 위치를 재점검하고자 한다.
3 Dimensional Position Estimation for Eye-in-Hand Robot Vision
장원,김경진,정명진,변증남,Jang, Won,Kim, Kyung-Jin,Chung, Myung-Jin,Bien, Zeungnam The Institute of Electronics and Information Engin 1989 전자공학회논문지 Vol.26 No.8
This paper describes a 3 dimensional position estimation method for a eye-in-hand robot vision system. The camera is mounted on the tip of a robot manipulator, and moves without restriction. Sequences of images are considered simultaneously for nonlinear least-square formation, and the best estimation of the 3 dimensional position is searched by the Simplex search algorithm. The experiments show that the proposed method can provide fairly accurate position information, while the robot is executing a given task.
폐기물 처리시설 입지선정 평가기준 설정에 관한 사례연구
장원,정종관 한국환경영향평가학회 1997 환경영향평가 Vol.6 No.2
The siting process of municipal solid waste treatment facility consists of a structured set of policies that guide the implementation of waste management goals. The main problems of siting process are the social and political context or the community opposition. During the past, the traditional siting process has been obsolete in most parts of the country, so public officials and researchers have tried to experiment with new policies and procedures. A number of controversial issues offer insight into the factors that are related to the local residents opposition to new waste treatment, facilities. The purpose of this case study focused on the establishment of criteria in the site selection of waste treatment facilities which can carry out resources recovery, incineration and landfill simultaneously. That is to say, the main points are to make concrete the quantification standards of assignment and take an objective allotment scale according to the assessment factors. The summarized result are as follows; 1. To promote the site selection based on the guideline such as rational, objective and due process of law, it is desirable to inform the local residents the methods of assessment in advance. 2. Totally 20 factors for the site selection are divided into 3 categories such as living environment characteristics, technological location characteristics and socio-economic factors. And the supposed magnitude of weight in all items are equally applied. 3. In regard to 20 assessment factors, the allotment of point is distributed by the specific location characteristics. Namely to the make the assessment easily, each factors are set the scale from 1 to 5 points en masse along the data which are acquired in the region.
뒤샹의 반전통적 다다 예술에 있어서 ‘아나키즘’의 문제
장원 한국프랑스문화학회 2023 프랑스문화연구 Vol.56 No.1
This study aims to take a view on the relationships between Marcel Duchamp’s art-theoretical and ideological basis of his Anti-conventional art with the anarchism. The First World War struck the whole area in Europe, and as a result, an ideological reconsideration came strongly to the fore among the intellectuals and artists. The Dada Movement arose as a destructive alternative due to the doubt on the Western tradition and values; the field of art and culture was a battleground for subverting the older conception by overcoming the border among cultural genres, claiming anti-convention and anti-aesthetics. Among many Dadaists, Duchamp’s art was germinating the sprout of contemporary art in spite of his short art career, based on the anarchist idea of Max Stirner, a German philosopher in the nineteenth century, who criticized the European civilization and developed anarchist theory. Therefore, this study tries to suggest a point that the process of contemporary art has stemmed from Duchamp’s anarchist art, by arguing his Dadaist art in terms of the cultural practice of anarchism.