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Effect of Mn and C on Age Hardening of Fe–Mn–Al–C Lightweight Steels
Sung‑Won Park,Jun Young Park,Kyong Mox Cho,Jae Hoon Jang,Seong‑Jun Park,Joonoh Moon,Tae‑Ho Lee,Jong‑Ho Shin 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.3
The effects of Mn and C content on the age hardening of Fe–Mn–Al–C lightweight steels, which have austenitic or duplex(austenite and ferrite) microstructures, were investigated. An increase in Mn content induced a delay of the age hardeningthat is caused by the formation of intra-granular κ-carbides. In order to interpret the effect of Mn content, first-principlescalculations were conducted using the supercells of Fe24Al8C8,Fe24Al8C7,Fe24(Al7Mn)C8, and Fe24(Al7Mn)C7. The calculationsshowed that an increase in Mn content could be the source of the delay of the intra-granular κ-carbide formation bysuppressing C atom’ occupation of the vacancy at the body-centered site of L12. An increase in C content accelerated theformation of intra-granular κ-carbides, which induced the intense age hardening, and coarse inter-granular κ-carbides, whichresulted in significant decrease in impact absorbed energy due to inter-granular fracture.
수령독재 하에서 권력과 이권을 둘러싼 갈등 동학 그리고 장성택 숙청
박형중 ( Hyeong Jung Park ),최대석 ( Dae Seok Choe ),김학성 ( Hank Sung Kim ),박영자 ( Young Ja Park ),장인숙 ( In Suk Jang ) 북한연구학회 2014 北韓硏究學會報 Vol.18 No.1
수령독재 하에서는 수령 지위를 차지하고자 하는 권력 투쟁은 존재하지 않는다. 그러나 수평적으로 주요 기관과 엘리트 개인의 권력과 이권의 지분을 확대하기 위한 경쟁이 존재한다. 이러한 경쟁은 수령에 대한 ‘충성경쟁’이라는 외피를 갖는다. 권력 세습 기간 동안 이러한 경쟁이 현저히 증가한다. 권력 세습은 수령독재가 기반하는 통치연합을 재편성하는 과정이기 때문이다. 김정일에서 김정은으로의 권력 세습 과정에서 기관과 엘리트 사이에 권력 및 이권 관련경쟁에서 두 가지가 두드러지게 나타났다. 그 하나는 권력 세습 과정에서의 주도적 세력이 되고자 하는 경쟁 즉 후견권을 둘러싼 경쟁이다. 그 다른 하나는 기관별로 권력과 이권의 지분을 확대하기 위한 경쟁이다. 장성택은 이 두 가지 경쟁에서 모두 주역이었다. 그의 숙청도 이와 관련되어 있었다. Under the Suryong dictatorship, by definition, there is no political completion for Suryong`s status. There are, however, horizontal competitions to expand power and interest carried out by major power organizations and elites. Apparently they are loyalty competition devoted to the Suryong. During the power succession, as the ruling coalition is reconstructed, they intensify themselves. Two features have been pronounced during the hereditary succession from Kim Jong-il to Kim Jong-un in regard to competition for power and interest among power organizations and elites: the one is the competition for regency, i.e. to advance oneself as the dominant force in the promotion of the power succession; the other is the competition for increasing share of power and interest by power organizations and elites. Jang Sung-taek has stood in the center of these two competitions and he was purge thereof.
장시웅(Si-woong Jang),박영식(Young-sik Park),성현용(Hyun-yong Sung),곽길봉(Gil-bong Kwak),김선남(Seon-nam Kim),김경진(Kyeoung-jin Kim) 한국정보기술학회 2009 Proceedings of KIIT Conference Vol.2009 No.-
본 연구는 차량 주변을 지능적으로 감시하는 자동차 주변 감시시스템에 관한 것으로, 자동차의 주행 및 주차 시 속도의 변화나 운전자의 요청에 의해 자동차 주변 지역에 관한 시야를 상황에 따라 달리하여 모니터링 함으로써 운전자가 안전한 주행 및 주차를 수행할 수 있게 하기 위한 것이다. 그러한 목적을 달성하기 위하여 본 연구에서는 차량의 주변부를 감시하기 위하여 차량의 외곽에 설치된 카메라의 각도가 지면으로부터 차량의 상부를 향하는 방향으로 변경될 수 있도록 제어하는 제어부, 카메라의 영상을 입력받아 차량주변의 영상을 생성하는 영상처리모듈, 영상처리모듈에서 생성된 영상을 출력하는 디스플레이를 포함하는 것을 특징으로 하는 지능형 자동차 주변 감시시스템을 제안한다. This study is on a vehicle surroundings monitoring system, which enables a driver to travel and park safely by monitoring vehicle surroundings, depending on the speed of vehicle and driver's control when traveling and parking. To achieve the aforementioned purpose, we propose an intelligent vehicle surroundings monitoring system, which consists of a control part, an image processing module and display module. Hence, the control module controls angle of camera to turn upward from the bottom to monitor vehicle surroundings. The image processing module merges the received images from cameras with the original vehicle image to display the vehicle’s surroundings in real time as if looking down from the sky.
플라즈마 정보인자를 활용한 SiO<sub>2</sub> 식각 깊이 가상 계측 모델의 특성 인자 역할 분석
장윤창,박설혜,정상민,유상원,김곤호,Jang, Yun Chang,Park, Seol Hye,Jeong, Sang Min,Ryu, Sang Won,Kim, Gon Ho 한국반도체디스플레이기술학회 2019 반도체디스플레이기술학회지 Vol.18 No.4
We analyzed how the features in plasma information based virtual metrology (PI-VM) for SiO2 etching depth with variation of 5% contribute to the prediction accuracy, which is previously developed by Jang. As a single feature, the explanatory power to the process results is in the order of plasma information about electron energy distribution function (PIEEDF), equipment, and optical emission spectroscopy (OES) features. In the procedure of stepwise variable selection (SVS), OES features are selected after PIEEDF. Informative vector for developed PI-VM also shows relatively high correlation between OES features and etching depth. This is because the reaction rate of each chemical species that governs the etching depth can be sensitively monitored when OES features are used with PIEEDF. Securing PIEEDF is important for the development of virtual metrology (VM) for prediction of process results. The role of PIEEDF as an independent feature and the ability to monitor variation of plasma thermal state can make other features in the procedure of SVS more sensitive to the process results. It is expected that fault detection and classification (FDC) can be effectively developed by using the PI-VM.
김영훈(Kim, Young-hun),장성호(Jang, Sung-Ho),박윤기(Park, Yun-Ki) 용인대학교 무도연구소 2012 武道硏究所誌 Vol.23 No.1
이 연구는 역대 YMCA 체육을 토대로 하여 구체적으로 살펴보고자 한다. 이에관해 생활체육 활성화 방안 모색을 제시하는데 논의 및 결론을 도출하였다. 이는 다음과 같이 확인할 수 있다. 첫째, 한국에서의 YMCA운동은 1899년 경성에서 선교활동을 시작되었다. 둘째, YMCA의 전인교육정신인 지(智)·덕(德)·체(體)의 정신과 통하는 정신으로서 비폭력, 민주주의의 실천교육과 상통하는 정신이었다. 셋째, 이상재의 교육사상은 인간의 본질적인 면에 치중하여 올바른 인격체로 양성하는 것으로 지·덕·체의 전인적 교육이었음 알 수 있었다. 넷째, 서울 YMCA의 창립과 역사적 배경을 보면 서울YMCA는 1903년 10월 28일 창립하였다. 다섯째, 서울YMCA를 도입, 회원들에게 지도한 스포츠로는 야구, 농구, 배구, 축구, 유도, 검도, 체조 등이 있었다. 이상과 같이 종합해 볼 때, 역대 YMCA 체육의 역사에서 보이듯이 그 정책을 통해 한국생활체육의 활성화를 위한 방안 모색에 따른 정체성을 제시할 수 있는 것이다. This research is looked at concretely is based on the generation of YMCA physical training. It derive a discussion and conclusion to grope a plan to activate living physical training. This can be confirmed by the following essay. First, the YMCA exercise in Korea started in Gyeong-sun, 1899 as a missionary activity. Second, the mind of former education of YMCA’s just·morality·formality was a mind connected to the communicating with anti-violence, democratic practice education. Third, Lee Sang-Jea’s educational method is to bring up the personality to the right side valued on true nature of a human being, which indicates that his educational method is for the whole man. Fourth, looking at the foundation and historical backround, Seoul YMCA was established on 28th October 1903. Fifth, sports that Seoul YMCA guided to members were baseball, basketball, volleyball, football, judo, kendo, gymnastics etc. To round up all the above statements, the identity following a plan to activate Korea living P.T can be derived through the policy as seen in YMCA physical training’s history in generations.
전영은 ( Young Eun Jeon ),윤명근 ( Myoung Kun Yoon ),김성주 ( Sung Joo Kim ),장봉림 ( Pong Rheem Jang ),강정배 ( Jung Bae Kang ),박영한 ( Young Han Park1 ),임채춘 ( Chae Chun Rhim ),민수기 ( Soo Kee Min ) 대한주산의학회 2006 Perinatology Vol.17 No.1
Uterine arteriovenous malformations are very rare but potentially life threatening lesions. These lesions may be congenital or acquired, but especially occur in patients with a history of curettage, abortion or pregnancy. Color doppler ultrasonography is the preferred method of diagnosing of arteriovenous malformations. In many cases, hysterectomies are performed. But if patients want pregnancies, embolization therapy and conservative treatment are effective therapy. We have experienced a clinical case of uterine arteriovenous malformation, which is presented with a brief review of literature.
Comparison of Nesting Rate of Osmia cornifrons Released with Different Field Condition
In-Gyun Park,Sang-Beom Lee,Kyeong-Yong Lee,Hyung-Joo Yoon,Sun-Joo Jang 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.05
In order to improve mass rearing methods of hornfaced bee, Osmia cornifrons, in different field condition, a series of studies were conducted in apple orchard in Geochang province, eco-park in Suwon and botanical park in Yongin. 1,000 individuals and 2,000 individuals of Osmia cornifrons were released apple orchard and eco-park and botanical park respectively. Nesting rate of Osmia conifrons was most effective in case of releasing in botanical park in Yongin with 38.2% and lowest in eco-park in Suwon with 21.7%. And also number of cocoons nested in bamboo tube traps was highest in botanical park in Yongin with 3,494 individuals. Sex ratio in 3 different areas was also most effective with 58:42 in botanical park, 50:50 in apple orchard and lowest with 43:57 in eco-park. Nesting activity was shown starting point in 20th day, peak point in 38th day and ending point in 46th day after releasing of adults. This result shows nesting efficacy in botanical park designed with various species of plant sources pollinating insect, Osmia cornifrons, to increase the multiplication rate in field condition is more effective than other areas. General type of nest shows same tendency in efficacy of nesting rate compared with specific type of nest designed with dark thick cover in apple orchard. But it's result needs some further examination in same condition.
Preparations and Characterizations of TiO2Pastes for Flexible Dye-Sensitized Solar Cells
Jang, Young-Wook,Kim, Young-Keun,Park, Hyun-Woo,Won, Du-Hyun,Cho, Sang-Eun,Hwang, Won-Pill,Jung, Ki-Suck,Kim, Mi-Ra,Lee, Jin-Kook Informa UK (TaylorFrancis) 2011 MOLECULAR CRYSTALS AND LIQUID CRYSTALS - Vol.538 No.1