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공군 전투기 시뮬레이터와 워게임 모델의 V-C 연동에 대한 연구
김용환,송용승,김창욱,Kim, Yong Hwan,Song, Yong Seung,Kim, Chang Ouk 한국시뮬레이션학회 2019 한국시뮬레이션학회 논문지 Vol.28 No.2
전장상황의 변화와 첨단정보통신기술의 발전에 따라 과학화된 훈련체계인 LVC 훈련체계가 주목을 받고 있다. 대한민국 공군은 전투기 시뮬레이터를 중심으로 공중전투기동장비(ACMI), 워게임모델을 가상의 합성전장환경에 구현하여 실전적이고 과학적인 훈련이 가능한 LVC 훈련체계를 구축하고자 한다. 본 논문에서는 공군의 Virtual 체계인 전투기 시뮬레이터와 Constructive 체계인 전구급 연습용 모델의 V-C 연동시험 수행결과에 대해 다루고자 한다. 기종별로 각각 상이한 연동방식을 갖춘 F-15K, KF-16, FA-50 전투기 시뮬레이터를 표준 연동방식으로 변환하였으며, 합성 전장환경 모의 도구를 활용하여 3개 기종의 전투기 시뮬레이터가 상호 연동이 가능한 환경을 구축하였다. 그리고 공군의 연습용 모델인 창공모델도 표준 연동방식으로 변환하였으며, 연동 최적화를 위해 SW 일부를 수정하였다. 이를 통해 공군의 전투기 시뮬레이터와 워게임 모델이 연동이 가능함을 확인할 수 있었다. 본 연구결과는 향후 공군 LVC 훈련체계 개념연구 및 체계개발 간에 유의미하게 참조할 만한 근거가 될 것임을 기대한다. LVC(Live-Virtual-Constructive) training system is drawing attention due to changes in battlefield situation and the development of advanced information and communication technologies. The ROKAF(Republic of Korea Air Force) plans to construct LVC training system capable of scientific training. This paper analyzes the results of V-C interoperability test with three fighter simulators as virtual systems and a theater-level wargame model as a constructive system. The F-15K, KF-16, and FA-50 fighter simulators, which have different interoperable methods, were converted into a standard for simulation interoperability. Using the integrated field environment simulator, the fighter simulators established a mutually interoperable environment. In addition, the Changgong model, which is the representative training model of the Air Force, was converted to the standard for simulation interoperability, and the integrated model was implemented with optimized interoperability performance. Throughput experiments, It was confirmed that the fighter simulators and the war game model of the ROKAF could be interoperable with each other. The results of this study are expected to be a good reference for the future study of the ROKAF LVC training system.
김용환,이성은,김홍만,박창수,원용협,안종평,유태환,신동혁,서완석,강민호,Kim, Yong-Hwan,Lee, Seong-Eun,Kim, Hong-Man,Park, Chang-Su,Won, Yong-Hyeop,An, Jong-Pyeong,Yu, Tae-Hwan,Sin, Dong-Hyeok,Seo, Wan-Seok,Gang, Min-Ho 한국전자통신연구원 1984 전자통신 Vol.6 No.2
A long-wavelength ($1. 3\mum$) multimode fiber-optic transmission system has been developed and the field trial system has been installed over 17.3km distance in Daejeon Area by KETRI. The 45Mb/s and 90Mb/s system operate with BER $10^-9$over 17.3km distance, and they successfully operate on the route of 34. 6km length when the fiber cable is simply connected at one end. Average loss of the fiber cable shows 0. 81dB/km including splice loss and the average bandwidth over the 17. 3km distance is 170MHz.
물질흐름 및 특허분석을 통한 주석 스크랩 재활용 기술 동향
김용환,손성호,최한신,한철웅,김태범,안재우,김홍인,이기웅,Kim, Yong Hwan,Son, Seong Ho,Choi, Han Shin,Han, Chul Woong,Kim, Tae Bum,Ahn, Jae Woo,Kim, Hong In,Lee, Ki Woong 한국자원리싸이클링학회 2014 資源 리싸이클링 Vol.23 No.3
주석은 땜납, 주석도금강판, 청동 합금, 투명전극용 타겟 및 화학첨가제 등에 널리 사용되고 있다. 최근 자원의 희소성 및 경제성으로 인해 주석 스크랩에 대한 재활용 기술이 연구되고 있다. 본 논문에서는 주석이 함유된 공정 스크랩, 슬러지, 도금 폐액 및 합금의 재활용 기술에 대하여 1970년부터 2013년까지 공개/등록된 한국, 미국, 중국, 일본, 유럽의 특허에 대하여 조사하였다. 특허는 키워드를 사용하여 수집하였으며, 기술의 정의에 의해 필터링 하여 연도, 국가, 출원인 및 기술에 따라 분석하였다. Tin has been widely used to solder, tin plated steel, bronze alloy, sputtering target for transparent electrode and chemical additives. It has been widely reported to the recycling technologies for tin scraps because of the scarcity and economic efficiency of the reserve. This study was analyzed by using open/registered patents KR, US, CN, JP and EP related to recycling technologies for processing scrap, sludges, waste fluid for plating process and spent alloy containing tin in between 1970 and 2013. Patents were collected using key-words searching and filtered by filtering criteria. The trends of the patents were analyzed by year, country, appliant and technology.
고지방식이 병행섭취 시 연잎, 연 줄기, 연자방 분말가루가 흰쥐의 혈중 생화학적 인자에 미치는 영향
김용환,최경순,신경옥,Kim, Yong-Hwan,Choi, Kyung-Soon,Shin, Kyung-Ok 한국식품영양학회 2016 韓國食品營養學會誌 Vol.29 No.5
In this study, we analyzed the biochemical factors in lotus (Nelumbo nucifera) leaf, stem, and yeonjabang and their effects on serum factor levels in mice fed a high-fat (HF) diet. The loutus leaf showed $9.47{\pm}0.30%$ moisture content, $8.25{\pm}0.39%$ ash, $21.45{\pm}1.25%$ crude protein, and $2.21{\pm}0.13%$ crude fat content; the lotus stem showed $11.84{\pm}0.43%$ moisture, $10.21{\pm}0.64%$ ash, $17.55{\pm}0.92%$ crude protein, and $4.16{\pm}0.23%$ crude fat content; and the lotus yeonjabang showed $11.86{\pm}0.50%$ moisture, $6.81{\pm}0.51%$ ash, $18.71{\pm}1.02%$ crude protein, and $3.95{\pm}0.15%$ crude fat. Blood triglyceride levels were higher in the HF group ($146.43{\pm}38.81mg/dL$), and lower in the HF+yeonjabang groups ($98.00{\pm}17.18mg/dL$). In particular, blood triglyceride levels were significantly lower in the groups that had 10% dry yeonjabang powder added to the high-fat diet. The inclusion of excessive high-fat diet increased concentrations of serum insulin and leptin. Serum leptin concentrations were highest in the HF group mice ($3.00{\pm}1.35ng/dL$), whereas they were significantly lower in the HF+yeonjabang groups by $1.34{\pm}0.52ng/dL$ (p<0.05). Thus, addition of dry yeonjabang powder to the high-fat diet was more effective in regulating the levels of serum triglycerides and leptin in mice. Additional studies would help in the development of yeonjabang as a functional food.
생물막 담체를 이용한 고농도 암모니아성 질소 함유 산업폐수의 유기물 제거 및 질산화 반응 연구
김용환,조재현,이용우,정용대,이원권 ( Yong Hwan Kim,Jae Hyun Cho,Yong Woo Lee,Yong Dae Jeong,Won Kwon Lee ) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.1
Treatment of industrial wastewater containing high concentration of ammonia was studied using biofilm media such as Bio-CAP^(TM), Bio-PO.P^(TM) and Ringlace. Among the various configurations of biofilm media process, Bio-CAP^(TM)-Bio-POP^(TM) media process was considered as the best process for organic removal and nitrification reaction. Volumetric organic removal and nitrification rate of this process approached to approximately 6㎏ COD/㎥/day and 800g NH₃,-N/㎥/day, respectively. Settler was located between Bio-CAP^(TM) and Bio-POP^(TM) reactor to remove the inhibitory effect of SS on nitrification in 2nd Bio-POP^(TM) reactor. Organic removal rate and nitrification rate of Bio-CAP^(TM)-Bio-POP^(TM) process were 5 and 4 times higher, respectively than those of general activated sludge process. By using Bio-CAP^(TM)-Bio-POP^(TM) media process, it was expected to decrease the required area for treatment of industrial wastewater containing high concentration of organics and ammonia.
초내열합금 wide-gap 브레이징부의 미세조직 및 기계적 성질 변화에 미치는 첨가금속분말의 영향
김용환,권숙인,변재원,이원식,Kim Y. H.,Kwun S. I.,Byeon J. W.,Lee W. S. 한국재료학회 2005 한국재료학회지 Vol.15 No.6
The effect of IN738 additive powder on microstructure and mechanical properties of the wide-gap region brazed with BNi-3 filler metal powder was investigated. The wide-gap brazing was conducted in a vacuum of $2\times10^{-5}torr\;at\;1200^{\circ}C$ with various powder mixing ratios of additive to filler powders. The microstructures of the wide-gap brazed region were analyzed by SEM and AES. The region brazed with only BNi-3 filler metal powder had a microstructure consisted of proeutectic, binary eutectic and ternary eutectic structure, while that brazed with a mixture of IN738 additive powder and BNi-3 filler metal powder had a microstructure consisted of IN738 additive powder, binary eutectic of $Ni_3B-Ni$ solid solution and (Cr, W)B. The fracture strength of the wide-gap brazed region was about 680 MPa regardless of the additive powder mixing ratios. Cracks were initiated at the (Cr, W)B and binary eutectic of $Ni_3B-Ni$ solid solution, and propagated through them in the wide-gap brazed region, which lowered the fracture strength of the region.