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초임계 추출 공정을 이용한 유자 씨에 함유된 Nomilin 추출조건의 최적화
조성길,홍주헌,서상철,이보경,최용희 한국산업식품공학회 2005 산업 식품공학 Vol.9 No.1
Supercritical fluid extraction (SFE) has been used to extract the nomilin from citron seeds. The extraction pressure was increased 100 to 300 bar at the interval of 100 bar, at the temperature 40, 60, 80oC and the extracted time 30, 90, 150 min at CO2 flow rate 2 mL/min. Overall experiments were planned by central composition design and the results were analyzed by response surface methodology to find out the effects of three independent variables such as pressure (X1), temperature (X2) and time (X3) on the yield of nomilin extract (Y). Extraction yields of nomilin were affected by pressure, time and temperature in the decreased order, and the Taylor second order equation was obtained as Y=-650.683283 +11.337258X1-9.569495X2+3.874388X3-0.023381X1 2+0.039897X2 2-0.021832X3 2+0.006699X2X1+0.007193X3X1+ 0.004717X3X2. The optimum condition for the extraction process was obtained as the extraction pressure of 255 bar, and the time of 117 min at the fixed temperature of 46oC.
조성길 又石大學校 經營硏究所 1990 經營硏究 Vol.1 No.1
The perfectness of double-entry bookkeeping system has been praised by many notable authors in history. And ever since it was developed, the basis of framework of double-entry bookkeeping system has remained unchanged for more than five centuries. But it is possible that the dichotomy of double-entry bookkeeping system is extended to trichotomy of triple-entry bookkeeping system by means of interpreting existing two dimensions of double-entry bookkeeping system as wealth=capital instead of conventional interpretation, that is assets=equities. Therefore, the purpose of this study is to present the triple-entry bookkeeping system in order to disprove the perfectness hypothesis of double-entry bookkeeping system. The results of this study are as follows; 1) Temporal triple-entry bookkeeping system can be presented because of being able to extend the dichotomy of present(wealth)=past(capital) to the trichotomy of future(budget)=present(wealth)=past(capital). 2) Differential triple-entry bookkeeping system can be presented because of being able to consider capital as the "derivative" of the wealth and force as the "derivative" of the capital. Finally consideration of accounting in the third dimension are as follows; 1) extension of triple-entry bookkeeping system to quadruple-entry bookkeeping system or multi-entry bookkeeping system, 2) possibility of extension of causal entry bookkeeping to triple-entry bookkeeping, 3) implementation of triple-entry system in real world.
조성길 又石大學校 1998 論文集 Vol.20 No.-
The asset revaluation system has been applied in practical fields since 1958 in Korea. We have two points of view on the asset revaluation system; first this system must be continued to exist for purpose of improving financial structure and competitive power, second this system has to be abolished on account for weekening creditability and comparability of accounting information, and in due to harm fairness of tax burden. In Korea, the asset revaluation law was reformed of April 10, 1998. Therefore this article is purposed to study the contents of asset revaluation reformed-law and to understand effect of asset revaluation reformed-law on local taxes. The results of this article are as follows; the asset revaluation system must be abolished after taking alternative, and this system affects on registration tax and acquisition tax in local taxes.
조성길 又石大學校 經營硏究所 1996 經營硏究 Vol.3 No.-
본 연구에서는 기업집단에 대한 실질과세를 실현하기 위한 한 방안으로서 연결법인세제가 도입되어야 할 타당성을 제시함과 아울러 우리나라 여건에 맞는 연결법인세제의 시안을 적용대상결정, 과세표준결정, 세액결정, 세액배분의 내용별로 제시하고자 한다.
조성길,Cho, Seong-Kil Intelligent Transportation Systems 2008 한국ITS학회논문지 Vol.7 No.5
This research addresses the problem of estimating Origin-Destination (O-D) trip matrices from link volume counts, a set of unobserved link volumes and information of user equilibrium flows in transportation networks. A heuristic algorithm for estimating unobserved link flows is derived, which provides volume estimates that are approximately consistent with both observed flows and an assumption of user equilibrium conditions. These estimated link volumes improve the constraints associated with the synthetic OD estimation model, providing improved solution search procedure. Model performance is tracked in terms of the root mean square errors (RMSE) in predicted travel demands, and where appropriate, predicted linked volumes. These results indicate that the new model substantially outperforms existing approaches to estimating user-equilibrium based synthetic O-D matrices. 본 논문은 교통망에서 관측 링크 교통량, 미관측 링크의 이용자평형 정보를 이용하여 O-D행렬을 수학적으로 생성하는 모형을 제시하고 있다. 교통량이 관측되지 않은 링크로부터 이용자 평형 상태에서 추출 가능한 정보를 바탕으로 일련의 논리적 연산을 거쳐 실제교통량에 근접하는 서브알고리듬을 유추하여 O-D행렬 추정의 정확도와 연산의 일관성을 제고하였다. 이를 위해 이용자평형상태에서 새로운 정리(Theorem)와 보조정리(Lemma)를 유도하여 적용하였다. 모형의 시험은 3개의 초기 O-D 행렬과 3개의 미관측 링크 교통량 시나리오를 각각의 모형에 적용하여 그 결과를 비교하였다. 적용 결과 본 논문에서 제시된 모형은 기존의 이용자균형 접근방식의 모형emf에 비해 추정된 O-D값의 실제 값과의 차이(O-D Trip RMSE)가 현저히 감소되는 것을 확인하였다.
CuAu 합금의 규칙화 과정에 따른 역위상 경계의 동적관찰
조성길,이갑호,평임진 대한금속재료학회(대한금속학회) 1992 대한금속·재료학회지 Vol.30 No.7
In situ observation of antiphase domain boundary on the ordering process in CuAu thin film was made by transmission electron microscopy. At 320℃, in CuAuII stability range, antiphase domains are nucleated in CuAu I phase and grow along[100 or [010] directions. In CuAu II phase which involved a antiphase domain with two orientation variants, a large domain absorbed a small one in order to eliminate the lattice strain of interface. At 270℃, in CuAu I stabilty range, domain boundaries disappear with the reduction of domains. The diffuse character of the periodic antiphase boundaries is discussed in comparsion with a high resolution image showing the nucleation and growth of antiphase domain.