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VP-BEM 기법을 이용한 초공동 수중 운동체의 형상 및 수심 변화에 따른 수치해석
황대규,안병권,박정훈,전윤호,황종현,Hwang, Dae-Gyu,Ahn, Byoung-Kwon,Park, Jeong-Hoon,Jeon, Yun-Ho,Hwang, Jong-Hyon 한국군사과학기술학회 2021 한국군사과학기술학회지 Vol.24 No.2
In recent years, the maturity of the technology for a high speed underwater vehicle using supercavitation increase, it is entering the stage of applied research for practical use. In this study, hydrodynamic performance of the supercavitating object was evaluated by using a Viscous-Potential based Boundary Element Method(VP-BEM). 27 models with different shape parameters such as body diameter, length and fore-body shape were considered. The process of the supercavity development of each model was simulated, and drag generated according to operating conditions such as changes in water depth was analyzed.
이재호(Jae Ho Lee),윤호주(Ho Ju Yun),안명주(Myung Ju Ahn),김태화(Tae Hwa Kim),김성윤(Seong Yoon Kim),김목현(Mok Hyun Kim) 대한내과학회 1987 대한내과학회지 Vol.33 No.6
N/A We compared the genetic distances between the Far-Eastern populations to investigate the relationship between them. Sampled regions were nine countries. The method was microcytotoxicity of NIH by use of antisera received from 3rd AOHWS. We used the results of HLA frequency published from 3rd AOHWS. The genetic distances are calculated by Nei et all equation. The following are the results. 1) The nearest GD with Southern Korean is Japanese. Historically, this was reflected of close relationship between Korean and Japanese. 2) There were near GD between North Chinese neigh-boring populations. This thought that North Chinese had a close contact with neighboring countries. 3) However, this should be confirmed again after subdivision of regions, and also be required of many investigations to cover the defect of this study.
이경태,임형주,김상욱,안윤호,윤여동,Lee Kyung-Tae,Lim Hyung-Joo,Kim Sang-Wook,Ahn Yun-Ho,Youn Yeo-Dong 한국디지털콘텐츠학회 2002 한국디지털콘텐츠학회논문지 Vol.3 No.1
Radiologic images are widely used in hospitals for diagnosing and treating patients' diseases. The radiologist accurately reads radiologic images, and thus helps diagnose patients correctly. The number of radiologists is much smaller than is necessary, however. In some small or rural hospitals, there are no radiologists residing there. In these cases, correct diagnosis and treatment are infeasible. Also, radiologists are not resident at hospitals all day long. Thus, emergency patients would suffer from the absence of radiologists at night. XRay21 Inc. and Data & Knowledge Engineering Lab. at Kangwon National University have been working together since 2000 in order to alleviate the problems above. Currently, the advances of the computer and network technology make it possible to connect a lot of radiologists and hospitals together through the Internet. By fully utilizing the Internet environment, we have developed an Internet-based medical diagnosis system, thus permitting remote diagnosis of radiologic images. This paper presents the technical experiences obtained in developing the system.
삼성분계 THF + 3-OH THF + CH<sub>4</sub> 크러스레이트 하이드레이트의 상평형 거동 해석 및 분광학적 분석
김희중 ( Heejoong Kim ),안윤호 ( Yun-ho Ahn ),문석윤 ( Seokyoon Moon ),홍수진 ( Sujin Hong ),박영준 ( Youngjune Park ) 한국화학공학회 2017 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.55 No.3
In this study, the inclusion phenomena of tetrahydrofuran + 3-hydroxytetrahydrofuran + CH<sub>4</sub> clathrate hydrates were explored via thermodynamic and spectroscopic approaches. The phase equilibria of the double hydrates - THF + CH<sub>4</sub> and 3-OH THF + CH<sub>4</sub> clathrate hydrates - were determined by pressure-temperature trace during hydrate formation and dissociation, and the result revealed that the equilibrium pressures were shifted to lower pressure region compared to pure CH<sub>4</sub> hydrate. The powder X-ray diffraction patterns revealed that the double hydrates of THF + 3-OH THF formed structure II type clathrate hydrates with CH<sub>4</sub>. The dispersive Raman spectra of the double clathrate hydrates also exhibited that CH<sub>4</sub> can be trapped in both 5<sup>12</sup>6<sup>4</sup> and 5<sup>12</sup> cages whereas THF and 3-OH THF were encaged in 5<sup>12</sup>6<sup>4</sup> cage.