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최상대(S. D. Choi),김미선(M. S. Kim),안명천(M. C. Ahn),최영근(Y. G. Choi),김기왕(G. W. Kim),박달호(D. H. Park),황도근(D. G. Hwang),이상석(S. S. Lee) 한국자기학회 2006 한국자기학회지 Vol.16 No.4
The electric signals for the voltage as a function of distance between Hall devices and permanent magnets over the radial artery were investigated. The electric signals, that means signals of arterial pulse wave, were differentiated by the hardware of circuits and then were changed to differential signals as magnetic field. The 3-D images simulated by the software as function of the intensity of differential signals were achieved. It shows that these system can apply to pulse diagnostic apparatus of portable type medical instrument.
Laser 열처리를 이용한 FeMn / NiFe 박막의 자화 반전
최상대(S. D. Choi),진대현(D. H. Jin),김선욱(S. W. Kim),김영식(Y. S. Kim),이기암(K. A. Lee),이상석(S. S. Lee),황도근(D. G. Hwang) 한국자기학회 2004 한국자기학회지 Vol.14 No.6
We have studied local magnetization reversal and magnetic properties induced by Laser annealing method in the strip-patterned Ta/NiFe/FeMn/Ta and Ta/NiFe/FeMn/NiFe/Ta multilayers fabricated by ion-beam deposition. The films were exposed to the emission of the DPSS (Diode Pumped Solid State, Nd:YAG) laser under 600 G. The laser beam intensity increased up to 440 ㎽. When the laser illuminated the patterned film with the power of above 200 ㎽, the intensity of MR peak located in +87 Oe shrunk. A new MR peak was generated at -63 Oe. When the laser power is 400 ㎽, the location of positive MR peak(Hex) was changed slightly from +87 Oe to +76 Oe, and the MR ratio was decreased from 0.9% to 0.1 %. On the other hand, the new (negative) MR peak shifted from -63 Oe to -80 Oe, with the MR ratio increased up to 0.3%. As the illuminated area expanded, the intensity of opposite MR peak increased and it of negative MR peak decreased. This proved that the local reversal of exchange biasing should be realized by laser annealing.
최상일(S.I Choi),김영동(Y.D Kim),강원찬(W.C Kang),김아현(Y.H Kim),오금곤(G.G Oh) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
In this Paper, We are going to propose the fire protection system with using CAN(Controller Area Network). The larger, higher and deeper buildings are, the more dangerous people are when fire happens. We are aware of the problems of prior Fire protection system. Therefore, we construct embedded system based on CAN communication that is capable of N:N communication, and build independent Fire protection system.
최상범(S.B. Choe),조대환(D.H. Cho),최주열(J. Y. Choi),이철희(C.H. Lee) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.4
The objectives of model ship(1:100) test are aimed to ensure the reducing effects of exhaust gas return phenomena through the ship structure converting and the flow visualization test of exhaust gases emitted from the stack. The influences of variations of ship speed and wind velocity are evaluated in the wind tunnel test. Plume gas flow patterns were visualized and investigated by using a paraffin smoke generator and laser beam in the large wind tunnel test center.
MPEG - 4 프리젠테이션 시스템에서의 비디오 랜더링
최상길(S. Choi),김희선(H. Kim),김상욱(S. Kim),이광의(K. Lee),지동해(D. Ji) 한국정보과학회 1999 한국정보과학회 학술발표논문집 Vol.26 No.1B
본 논문에서 제시하는 MPEG-4 프리젠테이션 시스템은 DMIF(Delivery Multimedia Intergration Framework)를 통하여 전송되는 MPEG-4 기본 스트림을 파싱하고, 다양한 미디어를 포함하는 장면(scene)을 구성하여 이를 DirectX를 이용하여 랜더링하는 시스템이다. 본 논문에서는 MPEG-4 프리젠테이션 시스템에서 DirectShow를 이용하여 비디오를 렌더링하는 기법을 제안한다. 제안하는 비디오 렌더링 기법은 먼저 렌더링에 필요한 정보를 추출한 후, 스트림 객체를 통하여 DMIF 채널로부터 비디오 스트림을 읽고 버퍼링을 수행한다. 스트림 객체내의 버퍼를 공유하는 두 스레드간 동기화를 위해서 세마포를 이용한다. 스트림 객체가 읽은 데이터는 소스 필터로 전달되고 소스 필터가 읽은 비디오 스트림은 DirectShow의 멀티미디어 스트리밍 기법을 이용하여 DirectDraw 서피스(surface)에 출력된다.
최상범(S. B. Choi),조대환(D.H. Cho),봉태근(T.G. Bong) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-
A flow field around submerged vertical plate is investigated experimentally. Vortices are generated at the tip of each side of the plate. The largest vortices at each side of the plate eventually grow to the size of the water depth. The vortex shedding process can be divided into three phases: the formation of a separated shear layer, the generation and shedding of vortices, the formation of a vortex, and the impingement onto the upper flow.
최상공,서두석,강병규,Choi S.G.,Seo D.S.,Kang B.K. 대한수의사회 1978 대한수의사회지 Vol.14 No.3
제 4위좌방변립 발생예에 대하여 그 임상적진단과 수술적정복에 대하여 검토하였다. 박수음을 제외한 제 4위변립증의 특징적진단소견으로 이를 확진할 수 있었고, 좌염부절개에 의하여 제 4 위를 제 1 위우측하부에 결착하는 방법으로 좋은 결과를 얻을 수 있었다. One case of left-sided abomasal displacement is described. The examination methods available to the practitioner do lead to a positive diagnosis except one of the splashing sound of abomasum. Preference is given to laparotomy (rumenotomy) from the left si