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RISS 인기검색어
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- 저자 : 홍의석(Eui Seok Hong) (검색결과 8 건)
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홍의석(Eui-seok Hong),박승신(Seung-sin Park),강왕구(Wanggu Kang) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
Shin Young Heavy Industry Co., Ltd. has developed tethered helium balloon for tourism with the technical consulting of KARI(korea aerospace research institute). The tethered helium balloon is becoming more popular in europe for city tourism and advertisement. The tethered balloon can climb up to 150m by the buoyancy of helium gas with 25 passengers. The main system of the tethered helium ballon consists of envelope for lifting gas(helium), gondola for passengers, winch system for operation(climbing & descent) and pressure control system of envelope. All main systems were developed by korean companies and engineers. The development requirement of the balloon system were set-up for domestic regulation and operating This paper summarized the final result of designing, fabrication and functional test of the balloon. The developed balloon will be in installed and make operation in this year.
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홍의석,고우신,Hong, Eui-seok,Ko, Woo-shin 大韓外官科學會 1999 大韓外官科學會誌 Vol.12 No.1
The gu-chang is oriental medical disease name. This study has been carried out to investigate pathogenic factor, pathogenesis, treatment method and medicine of the gu chang by referring to literatures. The results were obtained as follows; 1. Pathogenic factors are pungent taste, stir frying, rich and fatty diet, alchol, disorder of emotion, exogenous pathogen, excessive fatigue and indulgence in sexual activities. 2. Pathogenesis of the gu chang is that the fire heat go up to the mouse. 3. The symptoms are divided into two syndrome. one is sthenia syndrome(實證) - red color and swelling, unendurable pain, strong pulse(脈實), the other is asthenia syndrome(虛症) - pink color, a slight pain, relapse, loose stool, feeble pulse(脈虛). 4. The treatment method is divided into two parts. one is a sthenic syndrome (實證) - clearing strong heat (淸實熱), the other is a asthenic syndrome(虛症) - nourishing yin(滋陰) and clearing deficient heat (淸虛熱), reinforcing the spleen and strengthening middle - JIAO(健脾 補中). 5. The prescription were liang ge san(凉膈散), Ij jhong tang(理中湯) ,xie xim tang(瀉心湯), bu ja li jhong tang, (附子理中湯),liuwei wan(六味元), ba wei wan(八味元), zhuye shigao tang(竹葉石膏湯), si wu tang(四物湯), bu zhong yi gi tang(補中益氣湯) etc.
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피라미드 구조와 베이지안 접근법을 이용한 Markove Random Field의 효율적 모델링
정명희 ( Myung Hee Jung ),홍의석 ( Eui Seok Hong ) 大韓遠隔探査學會 1999 大韓遠隔探査學會誌 Vol.15 No.2
지표면에 대한 다양한 정보를 제공해 주는 원격탐사기법은 수 십년 동안 우리의 환경을 관찰하고 이해하는데 중요한 역할을 해왔다. 이러한 원격탐사 자료를 이용하는데 다양한 디지털 영상처리기법이 도입되어 자료에서 관찰되는 여러 가지 특성을 모형화하고 처리하는데 매우 유용하게 활용되어져 왔다. 화소들 간의 공간적 관계를 고려하는 Markov Random Field (MRF) 모형은 텍스처 모델링이나 영상분할 및 분류와 같은 여러 분야에서 많이 이용되는 모형으로 이것에 기초한 다양한 알고리즘이 발표되었다. 보통 원격탐사 자료는 그 크기가 매우 크고 시간적 간격을 두고 변화를 관측해 가는 경우에는 분석해야 할 자료의 양이 매우 방대하다. 이러한 자료를 처리하는데 걸리는 시간은 처리해야 할 자료의 양과는 비선형적 관계에 있다. 본 논문에서는 MRF를 이용하여 원격탐사 자료를 처리할 때 걸리는 시간을 단축하기 위한 방법론들이 연구되었다. 이를 위해 논리적 구조로 영상을 피라미드형태로 감소하는 크기로 분석하는 multiresolution 구조가 고려되었는데 이는 영상의 거시적 특징과 미세한 특징을 효율적으로 분석할 수 있는 방법을 제공해 준다. 영상의 크기가 커질수록 파라미터 추정 또한 복잡하고 많은 시간을 요하게 된다. 본 논문에서는 이를 위해 Bayesian 방법을 이용하여 원격탐사 영상과 같은 크기가 큰 영상의 MRF 모형의 파라미터를 효율적으로 추정할 수 있는 방법이 제안되어 있다. Remote sensing technique has offered better understanding of our environment for the decades by providing useful level of information on the landcover. In many applications using the remotely sensed data, digital image processing methodology has been usefully employed to characterize the features in the data and develop the models. Random field models, especially Markov Random Field (MRF) models exploiting spatial relationships, are successfully utilized in many problems such as texture modeling, region labeling and so on. Usually, remotely sensed imagery are very large in nature and the data increase greatly in the problem requiring temporal data over time period. The time required to process increasing larger images is not linear. In this study, the methodology to reduce the computational cost is investigated in the utilization of the Markov Random Field. For this, multiresolution framework is explored which provides convenient and efficient structures for the transition between the local and global features. The computational requirements for parameter estimation of the MRF model also become excessive as image size increases. A Bayesian approach is investigated as an alternative estimation method to reduce the computational burden in estimation of the parameters of large images.
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洪義錫 光云大學校 1974 論文集 Vol.3 No.-
The tapered waveguide is regarded as a two-mode system, the modes being the forward and reverse waves. A reflection parameter can be defined, relating the amplitude of the reverse wave generated at a point in the taper to the amplitude of the forward wave at that point. The reflection parameter can be regarded as a coupling parameter between the two modes and coupled-mode theory can be used to obtain the overall reflection coefficient of the taper. A detailed analysis is given for the case of a homogeneously- filled tapered waveguide, with perfectly conducting walls, working in the dominant mode. The reflectionless tapers are constructed on theoretical back-grounds discussed in this thesis. The working freguency on design procedure is chosen 9 GHz. The measured results theoretical values are plotted on graph and compared with VSWR values of Linear tapers.
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康俊吉,洪義錫 光云大學校 1974 論文集 Vol.3 No.-
디지탈 통신 혹은 아날로그신호의 디지탈 메모리등을 위한 주파수 변조에 관한 시스템을 구성하였다. 본래는 양자화된 음성신호의 디지탈녹음을 위한 것으로서 디코딩을 행하였을때 본래의 아날로그 신호에 가까운 결과를 가져왔다. In the transmission or recording system for digital signals, some modulation techniques are used. High level and low level are shifted on frequencies of 50 KHz and 35 KHz respectively, and transmited to communication channel or to memory system. All system designed for these purposes showed in good results.
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