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광열치료의 열 투여량에 따른 세포 자멸사에 대한 수치적 연구
김무중(Moojoong Kim),김관택(Gwantaek Kim),김동혁(Donghyuk Kim),이희진(Heejin Kim),유재석(Jaisuk Yoo),김동권(Dong-Kwon Kim),김현정(Hyun Jung Kim) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
Photothermal therapy(PTT) is a therapy for selective ablation of the tumor by using a photothermal effect. However, in spite of using the photothermal effect, which is one of the fields of heat transfer, the research on heat transfer for photothermal therapy is insufficient. In photothermal therapy, GNPs (gold nanoparticles) are used as a photothermal enhancer to selective ablation of tumor. At this time, since the photothermal effect are different depending on the characteristics of the GNPs, and thermal and optical conditions of NIR laser, it is important to find an optimal condition suitable for selective ablation for effective photothermal therapy. In previous photothermal therapy studies, the temperature distribution in tumor tissues has been studied qualitatively. However, the correlation between the death of tumor tissue and thermal and optical conditions of NIR laser has not been quantitatively studied in terms of heat transfer. Therefore, in this study, the conditions (e.g. intensity, beam radius) of the lasers satisfying the apoptosis temperature (43℃ ~ 50℃ , which can effectively ablate tumors) were obtained for various sizes of tumor (width: 2mm ~ 10mm, depth: 0.5mm ~ 4.5mm) using numerical analysis. And quantitative analysis of the apoptosis rate of tumor tissue according to the thermal and optical conditions of photothermal therapy was performed.
김동혁(Kim, Donghyuk) 역사학회 2017 역사학보 Vol.0 No.236
Yevsei Liberman posed a reformist agenda to improve the material incentive system and increase the profitability of enterprises, as a person at the center of the controversy related to the reform or improvement of the system of Soviet and Eastern Socialism during the Cold War. This was a question of how to provide incentives to increase the profitability of individual and whole enterprises. His argument is also directly related to the debate on the essential nature of the socialist economy in that it discusses how to provide specific economic incentives to increase the profitability of an individual enterprise in a socialist society not intended for private profit. Existing studies range from the introduction of capitalist factors to the argument that Liberman’s argument elaborates the pricing mechanism under the planned economy. However, this is based on the dichotomical idea of the introduction of market elements or the elaboration of the central plan for the Soviet economic system. A review of the progress of the Liberman debate and its acceptance into policy reveals that it can not be judged whether or not the economic debate and the reform program of 1965 coincide with Liberman’s argument. The controversy between the material incentive system and the profitability of companies since 1955 has been converged with orthodox theories such as Gatovsky and reformist theories such as Liberman and Nemchinov. In other words, the debate over Liberman’s claims at the time was an attempt to solve problems within the Soviet socialist economic system.
LH2 멤브레인 저장탱크 인수기지 공정모사 및 설계조건 변화에 따른 BOG 발생량 예측
김동혁(Donghyuk Kim),이영범(Yeongbeom Lee),서흥석(Heungseok Seo),권용수(Yongsoo Kwon),박창원(Changwon Park),권휘웅(Hweeung Kwon) 한국가스학회 2022 한국가스학회지 Vol.26 No.5
미래에 수소 산업이 활성화되면 LH2 멤브레인 저장탱크 인수기지는 대용량 액화수소를 저장하고 송출할 수 있는 주요한 방안이다. 현재 이러한 인수기지가 존재하지 않기에, 기존 LNG 멤브레인 저장탱크 인수기지 설계 자료를 참고하여 기지 공정모사 모델을 완성하였다. 이 모델을 베이스로 하여 멤브레인 저장탱크 인수기지 운영에서 매우 주요한 인자인 기지 설계조건 변화에 따른 BOG 발생량을 예측하였다. 이를 통하여LH2 멤브레인 저장탱크 인수기지가 운영될 때를 대비하여 하역시 BOG 발생량을 최소화 할 수 있는 적절한 운전조건을 검토하고자 하였다. If the hydrogen industry is activated in the future, the LH2 receiving terminal with membrane storage tank is a major way to store and send large capacity hydrogen. Since such a LH2 receiving terminal does not currently exist, the process simulation model of it was completed by referring to the design data on existing LNG receiving terminal with same typed storage tank. Based on this model, the amount of BOG generation according to change of design conditions, which is a very important factor in the operation of LH2 receiving terminal, was predicted. Through this, it was attempted to review the appropriate operating conditions to minimize the amount of BOG generated during unloading in LH2 receiving terminal with membrane storage tank.
김동혁(Donghyuk Kim),이정환(Junghwan Lee),윤성의(Sung-Eui Yoon) 한국HCI학회 2013 한국HCI학회 학술대회 Vol.2013 No.1
모션 플래닝 분야에서 실시간으로 주변을 감지하고 움직이는 로봇의 경우 변화하는 장애물들에 대한 동적인 감지 및 분석과 제한된 경로 계산 시간 등의 제약이 따른다. 특히 무인 자동차와 같이 제어의 제약을 고려한 충돌이 없는 유효 경로 생성은 그 자체 만으로도 중요한 이슈이다. 본 연구에서는 샘플링 기반의 알고리즘인 RRT<SUP>*</SUP> 를 이용한 무인 자동차의 경로 생성기법에 대한 연구와 실시간 경로 생성을 위해 고려되는 부가적인 요소들의 유기적인 결합에 대해 소개한다. In motion planning field, it is necessary for the mobile robots which have ability to recognize the surrounding environments and move by itself, to detect, analyze the obstacles and compute feasible trajectory in real time. Especially, in case of car-like robots which have control constraints, it is challenging to only generate a feasible trajectory in a limited time. In this paper, we extend sampling based algorithm RRT<SUP>*</SUP> for autonomous vehicle with control constraints to takes advantage of dubins path, and its simplicity for easing trajectory calculation. In addition, we show some simple collision detection technique from dubins path.
소련과 서방의 기술-경제 교류, 1965~1970 : 소련 경공업부 산하 기관들의 사례를 중심으로
김동혁(Kim, Donghyuk) 부산대학교 인문학연구소 2022 코기토 Vol.- No.98
본고는 1965년부터 1970년까지 소련 경공업부 산하 기관들의 대서방 기술-경제적 교류의 예를 통해서 냉전기 소련과 서방 자본주의 국가들 사이의 관계를 재고찰하기 위한 작업이다. 냉전 초기 급격하게 경색되었던 소련과 서방 국가들 사이의 관계는 1950년대 후반에서 1960년대 초 점차 변화하기 시작했다. 이러한 변화 흐름을 잘 보여주는 예 중 하나가 당시 섬유, 직물 및 의류 산업 전반을 담당하는 소련 경공업부 산하 기관들의 대서방 기술-경제 교류이다. 소련 경공업부 및 그 산하 기관들에서 추진된 서방 기업 및 기관들과의 교류·협력 사업에서 가장 큰 비중을 차지했던 것은 서방의 섬유, 직물 및 의류 제조업의 선진 제조 기술의 습득과 최신 장비의 소련으로의 도입 사업이었다. 소련 전문가들은 섬유 및 의류산업이 가장 발달했던 영국, 프랑스, 이탈리아와 같은 서유럽 국가들에 정기적으로 파견되었고 선진 제조 기술 운용을 시찰하는 것이나 최신 패션 트렌드를 파악하는 것을 목표로 했다. 또한 정밀 기계나 제조 기계 등 기계·장비류 제조업 강국인 일본과 서독 등에도 많은 인원이 파견되었으며, 이들 국가들로부터 최신 장비의 도입을 위한 다방면의 노력이 진행되었다. 이처럼 1960년대 중반 이후 소련 경공업부는 자체의 기술적 필요에 의해 서방 국가들과의 교류와 협력에 매우 적극적이었으며 영국, 프랑스, 서독, 이탈리아 등 서유럽 주요국들과 동아시아의 일본 등도 소련과의 기술-경제적 협력에 적극적으로 응했다. I tried to reexamine the international relations between the Soviet union and the western capitalist countries by examining the technological and economic exchanges with the West of the various institutions and enterprises under the Ministry of Light Industry of the USSR from 1965 to 1970 in this article. The international relations between the Soviet Union and Western countries, which had been sharply strained at the beginning of the Cold War, began to change gradually in the late 1950s and early 1960s. One of the best examples of this trend was the technological-economic exchanges with the West by organizations and companies under the Soviet Ministry of Light Industry, which were managing the overall fiber, textile, and clothes industries at the time. Through exchanges and cooperations with Western companies, many companies and institutions under the Ministry of Light Industry of the USSR attempted to acquire advanced manufacturing technologies and introduce the up-to-date equipments in the textile and garment manufacturing fields of the West. Soviet experts were regularly sent to Western European countries such as England, France and Italy, where the textile and clothes industries were most developed, and aimed to observe the operation of advanced manufacturing technologies and to catch up on the latest fashion trends. In addition, a large number of personnel were sent to Japan and West Germany, which are powerhouses in the manufacturing of machinery and equipment, and the latest equipments were introduced from these countries. As such, since the mid-1960s, the Ministry of Light Industry of the Soviet Union was very active in exchanges and cooperations with Western countries due to its own technological needs, and major Western European countries such as Great Britain, France, West Germany, Italy, and Japan in East Asia also actively participated in technological-economic cooperations with the Soviet Union.