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이준성(Joon Sung Lee),임영민(Young Min Yim),이민규(Min Gyu Lee),오득환(Deuk Hwan Oh),이해연(Hae-Yeoun Lee) 한국정보기술학회 2016 Proceedings of KIIT Conference Vol.2016 No.6
오늘날 많은 사람들이 메신저를 사용하지만 잘못된 메시지를 전송하여 불편한 상황이 발생하는 경우가 많이 있다. 이에 따라 전송한 메시지를 취소하는 기법으로 단순 삭제, 메시지 변경, 백업 및 메시지 변경 방식을 사용 할 수 있다. 본 논문에서는 메신저를 사용하는 사용자의 실수를 보완하기 위한 다양한 메시지 취소 기법에 관해 설명하고, 메시지를 취소 기법으로서 백업 및 메시지 변경 방식을 이용한 채팅 시스템의 설계와 개발에 대하여 설명하겠다. 실험에서는 개발한 시스템에 대하여 메시지 취소 작업에 필요한 처리시간에 대해 측정해 보았다. In these days, many people use messengers for communication. However, embarrassing situations happen by sending wrong messages. In order to solve these situations, messages can be canceled by a simple removal method, a message change method, or a backup and message change method. To compensate user’s mistakes, this paper explains various methods for message cancellation and presents the design and implementation of a message chatting system with a backup and message change method. In the experiments, the execution time of message cancellation is measured.
이준의 ( Jun Eui Lee ),이상원 ( Sang Won Lee ),이원형 ( Won Hyung Lee ) 한국사진학회 2011 AURA Vol.0 No.24
Humans` eye disparity is 65mm or less. The binocular disparity is an important factor of stereoscopic effect. Humans` stereoscopic feeling of an object is being caused by the double structure of eyes & rod(right brain) and nerve cone(left brain) organized by perceptual system. The rod of right brain affects to stare at an object, and the nerve cone of left brain makes possible to see an object in focused sight. In the principle of camera, they are similar with ``out of focus`` and ``pan focus``. The double structure of left & right brain does not works simultaneously, but it works by turns with delaying, by the double structure of brain such as above, humans are able to see the objects in stereoscopic 3D image. This perceptual system of human makes possible to express the image and video contents in stereoscopic by specific video devices, polarizing lens, red & blue glasses. The screen based stereoscopic images need captured images by two same cameras using the device which is called ``Rig``. Except the stereoscopic 3D images such as pre-produced photos or film, video, animation contents are needed to be produced in frame by frame. For instance, to convert film duration of 100 minutes to stereoscopic contents in manual processes, it needs about 100 to 300 of edit crew and budgets. To complement the disadvantages such as these, in this paper, we suggest the method for converting existing 2D image contents to stereoscopic 3D image contents by real-time 2D/3D image conversion algorithm. The stereoscopic 3D image conversion is the method that is create a stereoscopic image from the photos or videos; and does not get the captured video from stereo camera. First, separate the objects and backgrounds from existing original 2D image, set the distancepixel value from the separated sources, then separate the image in left-right; then adjust the external parameter value of internal and external of camera. Then create a stereoscopic image by move the occlusion area and image according to the camera`s location. Suggested method above presents the three-dimensional effects without any limitations of scene changing; and it converts not only videos, but still images also to stereoscopic images in real-time. The real-time stereoscopic conversion algorithm which was organized above has produced based on the hardware which is called ``Physical Board`` to complement the computational complexity from the limitation of the software`s algorithmic processes, and the drop of data processing speed. From the experiment, if we use the suggested method above, we can omplement the stereoscopic 3D image contents by dimensionalize all of existing 2D image contents to 3D, moreover, we can also save budget for creating stereoscopic 3D image contents production.
앱시스산 (酸) 에 의해 기공이 (氣孔) 닫히는 신호전달과정에서 G-단백질의 역할
이준상(Joon Sang Lee),이한주(Han Ju Yi),이수민(Su Min Lee),이영숙(Young Sook Lee) 한국식물학회 1994 Journal of Plant Biology Vol.37 No.4
Activation of phospholipase C (PLC) and consequent elevation of inositol 1,4,5-trisphosphate (IP_3) level have been reported during ABA-induced closure of stomata. However, it is not known yet whether G-protein regulates the PLC activity during the process. We tested if G-protein is involved in ABA-induced stomatal closure, using pertussis toxin (PT_χ), which inactivates its substrate G-proteins, and cholera toxin, which activates its substrate G-proteins. PT_χ inhibited ABA-induced stomatal closure both in intact epidermal peels from abaxial surface of Commelina communis L. and in partially digested epidermal tissue of Vicia faba L., which contained only guard cells and no other epidermal cells. Cholera toxin did not show any of the effect. Moreover, PT_χ completely blocked ABA-induced elevation of IP_3 level in partially digested epidermal tissue of V. faba L.. These results indicate that PT_χ-sensitive, PLC-linked G-protein is involved in signal transduction process of ABA in guard cells.
이준서(J.S.Lee),이해철(H.C.Lee),이민호(M.H.Lee),박명규(M.K.Park),차경옥(K.O.Cha) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
The pulsating pressure waves are composed of fundamental frequency and higher order harmonics in exhaust pipe of engines. The nonlinearity in exhaust pipe is caused by their interactions. The error which is between prediction and measurement is induced by the nonlinearity. We can not explain this phenomenon using linear acoustic theory which is existing theory. So power spectrum which was used in linear theory is not useful. Bispectrum and bicoherence functions which are a higher order spectrum are applicable to explain this phenomenon. This paper proposes a nonlinear effect of pulsating pressure waves. The phenomenon proposed here is identified by using of cross-higher order spectrum and quadratic Volterra model.<br/>
소화성궤양 가이드라인 비스테로이드소염제 관련 소화성궤양의 예방과 치료 가이드라인
이준행 ( Jun Haeng Lee ),이용찬 ( Yong Chan Lee ),전성우 ( Seong Woo Jeon ),김정욱 ( Jeong Wook Kim ),이상우 ( Sang Woo Lee ) 대한소화기학회 2009 대한소화기학회지 Vol.54 No.5
Non-steroidal anti-inflammatory drugs (NSAIDs) are among the most commonly used medications in Korea. Gastrointestinal toxicity, including peptic ulcer, is a common adverse effect of NSAIDs. Risk factors for NSAID-related peptic ulcer include a previous history of peptic ulcer, advanced age, high dose, concomitant use of corticosteroids, anticoagulants, other NSAIDs including low-dose aspirin. Preventive measure(s), such as COX-2 inhibitor, proton pump inhibitor or misoprostrol, should be done for patients requiring NSAID therapy who have high-risk factor(s) for peptic ulcer. Low dose aspirin also increases the risk of peptic ulcer, so preventive measure(s) should be done for high-risk patients. The eradication of Helicobacter pylori is recommended for high-risk NSAID-users. Treatment strategies for peptic ulcers in NSAID users are mostly the same for peptic ulcers in NSAID non-users. (Korean J Gastroenterol 2009;54:309-317)