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Lignocellulose 의 당화와 고정화 효모에 의한 에탄올발효
조항신,김승욱,홍석인 ( Hang Shin Cho,Seung Wook Kim,Suk In Hong ) 한국화학공학회 1992 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.30 No.5
The conversion of cellulose and lignocellulose such as Solka floc BW 200 and waste paper into ethanol using Trichoderma reesei cellulase and immobilized yeast was investigated. The object of this study is to decrease the product inhibition by performing simultaneous saccharification and fermentation(SSF), and is to control the biochemical metabolism of immobilized yeast by using fluidized-bed reactor, thus producing high productivity of ethanol. When the yeast was inoculated after 30 hours of the saccharification process, glucose concentration was increased temporarily after 1 hour of SSF and decreased rapidly by ethanol fermentation. And it was found that the saccharification was inhibited by the addition of glucose or ethanol. Fedbatch or semi-batch fermentation in the fluidized-bed reactor was more favorable than batch fermentation for ethanol production.
릴럭턴스를 이용한 Reluctive Pressure Transducer의 설계
조항신(HangShin Jo),박희성(HeeSung Park),주형준(HyungJun Joo),성세진(SeJin Seong),이기홍(KiHong Lee) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
Because of the powerful tolerance of overload, dynamic response and anti-erosion, Reluctive Pressure Transducer(RPT), as a measuring element of oil pressure equipment is applied to the measuring system of vessels, air craft. The Electrical reluctance appeared in the pressed diaphragm. To process the reluctance as a electric signal, bridge circuit is used. The design using the reluctance of pressure sensor is described in this paper. For the high efficiency of the sensitive RPT, pressure sensor structure is presented and electrical signal processing is simulated.<br/> <br/>
경사면에 적합한 Spidery Mesh Interface
조항신(Hang-Shin Cho),김창헌(Chang-Hun Kim) 한국정보과학회 1999 한국정보과학회 학술발표논문집 Vol.26 No.1B
본 논문은 경사면을 포함하는 장면에 적합한 spidery mesh interface 방법을 제시한다. 기존의 spidery mesh interface는 한 장의 이미지만으로 간단하고 효율적인 애니메이션을 가능하게 하였지만 배경모델을 구서하는 직사각형들이 서로 수직인 관계를 이루어야만 한다는 제약 조건이 있다. 본 논문은 이 제약조건 중 바닥에 해당하는 면에 대해서는 임의의 경사를 가지는 모델을 생성하도록 spidery mesh를 재구성 하였으며, 생성된 배경 모델은 비탈길이나 계단 등 경사면을 포함한 장면의 애니메이션에 활용될 수 있다.
Spidery 메쉬 인터페이스와 뷰 모핑을 이용한 두 이미지로부터의 효율적인 3차원 애니메이션
조항신(Hang-Shin Cho),김창헌(Chang-Hun Kim) 한국정보과학회 2001 정보과학회 컴퓨팅의 실제 논문지 Vol.7 No.2
본 논문은 동일 장면을 나타내는 한 쌍의 이미지를 이용한 효율적인 3차원 애니메이션 기법을 제안한다. 간단하고 빠른 애니메이션을 위해 그림 속으로의 여행은 한 장의 이미지에서 시점의 깊이 이동을 가능하게 하지만 전경물체의 표현이 시점의 좌우 변환의 사실감을 고려하지 않으며, 뷰모핑은 두장의 이미지 사이의 2차원 변환만을 이용하지만 시점의 이동이 두 카메라의 중심을 잇는 선상으로 제한된다는 단점이 있다. 본 논문은 두 기법의 단점을 서로 보완하여 시점의 깊이 이동뿐 아니라 좌우이동에서도 자연스러운 영상을 생성하는 새로운 애니메이션 기법을 제안한다. 본 논문에서는 배경 장면을 spidery 메쉬로부터 복원된 간단한 직육면체모델에 매핑하고, 관찰자가 주의 깊게 인식하는 전경물체에 대해서는 두 입력 이미지의 투영중심을 잇는 직선상에 평행한 시점의 이동에만 제한적으로 뷰모핑을 적용하여 장면전체의 이미지 픽셀들에 대한 3차원 정보의 복원 비용을 줄이면서도 시점이동의 사실감을 높인다. 두 전경물체 사이의 선형보간 파라미터는 두 spidery 메쉬 간의 차이와 이에 대응하는 배경모델에서의 3차원시점 변환과의 관계로부터 결정된다. 실험을 통해 제안방법이 간단한 인터페이스만으로도 사실감을 유지하는 자유로운 3차원 시점이동의 애니메이션을 생성함을 보인다. This paper proposes an efficient walkthrough animation from two images of the same scene. To make animation easily and fast, Tour Into the Picture(TIP) enables walkthrough animation from single image but lacks the reality of its foreground object when the viewpoint moves from side to side, and view morphing uses only 2D transition between two images but restricts its camera path on the line between two views. By combining advantages of these two image-based techniques, this paper suggests a new virtual navigation technique which enable natural scene transformation when the viewpoint changes in the side-to-side direction as well as in the depth direction. In our method, view morphing is employed only in foreground objects , and background scene which is perceived carelessly is mapped into cube-like 3D model as in TIP, so as to save laborious 3D reconstruction costs and improve visual realism simultaneously. To do this, we newly define a camera transformation between two images from the relationship of the spidery mesh transformation and its corresponding 3D view change. The result animation shows that our method creates a realistic 3D virtual navigation using a simple interface.
MATLAB/SIMULINK를 이용한 유도전동기 퍼지 PI제어기의 속도 제어
조항신(Jo. Hang-Shin),이학주(Lee. Hak-Ju),박주문(Park. Ju-Mun),국정현(Kuk. Jung-Hyun),성세진(Seong. Se-Jin) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
The conventional PI controller has been widely used in industrial application due to the simple control algorithm. But, it is very difficult to find the optimal PI control gain. Therefore, in this paper, to obtain optimal performance, fuzzy proportional-plus-integral controller for the vector control system of an induction machine is presented The simulation model is created in MATLAB/SIMULINK. The simulation results demonstrate the good performance of this system.
조항신(Cho, Hang Shin),전해정(Chun, Hae Jung) 한국주거환경학회 2020 주거환경(한국주거환경학회논문집) Vol.18 No.1
The purpose of the study is to analyze the effect of economic variables on the fluctuation of real estate trust deposit. In this study, VAR model was used as an analytic model. The time range was from the 1<SUP>st</SUP> quarter of 2001 to the 4<SUP>th</SUP> quarter of 2018. The spatial range was South Korea. The dependent variable was real estate trust deposit, and the independent variables were ‘Housing Purchase Price Index’, ‘CD interest rate’, ‘The Floor Area of the Construction Permit Structure’, ‘CPI’. The real estate trust deposit showed a positive (+) response to the impact of the CPI and negative (-) response to the changes in CD interest rate. In addition the real estate trust deposit showed a positive (+) response to the Housing transaction price index of the whole country. The real estate trust deposit showed a positive (+) response to the impact of ‘The Floor Area of the Construction Permit Structure’ as well. The fluctuation of the deposit accounted for the impact of the deposit itself and the impact of housing transaction price index of the whole country and CD interest rate, which is viewed from the 2<SUP>nd</SUP> quarter in different time. This study will help to expect the real estate trust’s market volatility, which has a significance as the first study of the empirical analysis of the effect of the economic variables to the variation of the real estate trust deposit.