아세톤-물혼합용매에서 trans-[Co(en)_2Cl_2]^+ 및 trans-[Co(1,3-pn)_2Cl_2]^+ 이온의 가용매 분해 반응에 미치는 압력과 용매조성의 영향

朴裕哲,卞鍾轍,金京美,趙靈濟 慶北大學校 物理化學硏究所 1985 硏究論文集 Vol.6 No.-

The rates of solvolysis of trans-[Co(en)_2Cl_2]^+ and trans-[Co(1,3-pn)_2Cl_2]^+, in which en and 1,3-pn are ethylenediamine and 1,3-propylenediamine resepectively, have been investigated using conductometric and spectrophotometric methods at various pressures up to 2,000 bar in acetone-water mixture. The activation volumes obtained from the pressure effect on rate constants were small and positive values in both complexes of trans-[Co(en)_2Cl_2]^+ and trans-[Co(1,3-pn)_2Cl_2]^+. These results are discussed in terms of dissociative mechanism (S_NI) for the solvolysis of both complexes. The importance of solvent composition on the reaction is further confirmed by application of a free energy cycle. It is concluded from the free energy cycle that the effect of solvation of transition state in the solvolysis of both complexes is more dominant than that of initial state. In addition to that, it is shown that the character of S_NI is further increased with increasing the content of acetone.

뇌졸중 후 치매환자에서 도네피질(아리셉트^(?))이 인지기능 및 일상생활 수행능력, 삶의 질에 미치는 효과

이상열,장혁,송재은,조성옥,류정미,이미경,조진호,신용일 圓光大學校 醫科學硏究所 2008 圓光醫科學 Vol.23 No.1

Background: This study evaluated the efficacy of administering Donepezil(Aricept^(?)) for improving cognitive function, activities of daily living, and quality of life in patients with post-stroke dementia. Methods: Patients(n=99; mean age, 69.89 years; 48.5% men) with post-stroke dementia, according to criteria of the DSM-IV and MRI, were treated with donepezil 5mg/day or 10mg/day during 24 weeks. They were examined using Mini-mental Status Examination(MMSE), Chinical Dementia Rating(CDR), Barthel Activities of daily living(B-ADL), Instrumental Activities of daily living(I-ADL), Short Form 36 Health Survey-Korean(SF-36-K), and Geriatric Depression Scale(GDS) at before treatment and 24 weeks after treatment. Results: The 97 patients completed the trial. At 24 weeks, they showed significant improvement in MMSE(p<0.001), CDR(p<0.001), B-ADL(p=0.002), I-ADL(p<0.001), and SF-36-K(p=0.003) except GDS(p=0.288). Donepezil was well tolerated. There was no withdrawal due to adverse events. Conclusion: This results demonstrate that donepezil was beneficial in improving the cognitive function, activities of daily living, and quality of life in patients with post-stroke dementia and was well toleraetd.

아세톤-물혼합용매에서 trans-[Co(en)_2Cl_2]^+ 및 trans-[Co(1,3-pn)_2Cl_2]^+ 이온의 가용매 분해 반응에 미치는 압력과 용매조성의 영향

朴裕哲,卞鍾轍,金京美,趙靈濟 慶北大學校 1984 論文集 Vol.38 No.-

The rates of solvolysis of trans-[Co(en)_2CL_2]^+ and trans- [Co(1,3-pn)_2CL_2]^+, in which en and 1,3-pn are ethylenediamine and 1,3-propylenediamine resepectively, have been investigated using conductometric and spectrophotometric methods at various pressures up to 2,000 bar in aceton-water mixture. The activation volumes obtained from the pressure effect on rate constants were small and positive values in both complexes of trans- [Co(en)_2Cl_2]^+ and trans- [Co(1,3-pn)_2CL_2]^+. These results are discussed in terms of dissociative mechanism (S_NI) for the solvolysis of both complexes. The importance of solvent composition on the reaction is further confirmed by application of a free energy cycle. It is concluded from the free energy cycle that the effect of solvation of transition state in the solvolysis of both complexes is more dominant than that of initial state. In addition to that, it is shown that the character of S_NI is further increased with increasing the content of acetone.

An Adaptable Integrated Prediction System for Traffic Service of Telematics

Cho, Mi-Gyung,Yu, Young-Jung The Korea Institute of Information and Commucation 2007 Journal of information and communication convergen Vol.5 No.2

To give a guarantee a consistently high level of quality and reliability of Telematics traffic service, traffic flow forecasting is very important issue. In this paper, we proposed an adaptable integrated prediction model to predict the traffic flow in the future. Our model combines two methods, short-term prediction model and long-term prediction model with different combining coefficients to reflect current traffic condition. Short-term model uses the Kalman filtering technique to predict the future traffic conditions. And long-term model processes accumulated speed patterns which means the analysis results for all past speeds of each road by classifying the same day and the same time interval. Combining two models makes it possible to predict future traffic flow with higher accuracy over a longer time range. Many experiments showed our algorithm gives a better precise prediction than only an accumulated speed pattern that is used commonly. The result can be applied to the car navigation to support a dynamic shortest path. In addition, it can give users the travel information to avoid the traffic congestion areas.

자동 세포 추적을 위한 클러스터 세포 분리 알고리즘

조미경(Mi Gyung Cho),심재술(Jaesool Shim) 대한기계학회 2013 大韓機械學會論文集B Vol.37 No.3

광학 현미경을 통해 일정한 시간 간격으로 얻은 세포 이미지로부터 세포 변화를 자동적으로 추적 및 분석하는 것이 세포 트래킹이라고 한다. 세포 변화 과정에서 이웃에 있는 세포들이 겹쳐져 있는 상태를 클러스터라고 하며 세포트래킹에서 클러스터를 다시 세포로 분리하는 작업은 매우 중요하다. 본 논문에서는 타원 근사법을 기반으로 클러스터를 분리하기 위한 알고리즘을 제안한다. 클러스터의 외곽선을 추출한 후 외곽선의 오목정점을 이용하여 클러스터를 라인 세그먼트들로 분리한 다음 휴리스틱을 이용하여 라인 세그먼트들을 결합해 가며 근사 타원을 생성한다. 실험 결과 두 개의 세포가 겹쳐진 클러스터의 경우 평균적으로 91%, 세 개의 세포가 겹쳐진 경우 평균적으로 84% 그리고 겹쳐진 세포의 개수가 네 개 이상인 경우 약 73%의 정확도로 클러스터를 분리해 주었다. An automated cell tracking system is used to automatically analyze and track the changes in cell behavior in time-lapse cell images acquired using a microscope with a cell culture. Clustering is the partial overlapping of neighboring cells in the process of cell change. Separating clusters into individual cells is very important for cell tracking. In this study, we proposed an algorithm for separating clusters by using ellipse fitting based on a direct least square method. We extracted the contours of clusters, divided them into line segments, and then produced their fitted ellipses using a direct least square method for each line segment. All of the fitted ellipses could be used to separate their corresponding clusters. In experiments, our algorithm separated clusters with average precisions of 91% for two overlapping cells, 84% for three overlapping cells, and about 73% for four overlapping cells.

제스쳐 허용 전자 잉크 에디터의 개발

조미경(Mi-Gyung Cho),오암석(Am-Suk Oh) 한국멀티미디어학회 2003 멀티미디어학회논문지 Vol.6 No.6

지도 불일치 보정과 새로운 측정 함수에 관한 연구

조미경(Mi-Gyung Cho),조환규(Hwan-Gue Cho) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.24 No.2Ⅱ

지리 정보 시스템에서 수치지도 보정(rubber sheeting)이란 물리적으로 동일 지역을 나타내고 있지만 일치하지 않는 두 지도사이의 불일치한 부분이 일치되도록 보정해 주는 것을 마란다. 본 논문에서는 동일 지역에서의 불일치한 부분을 일치하도록 보정해 주는 새로운 기법을 제시한다. 또한 보정된 결과가 어느 정도의 정확성을 가지고 있는 그 성능을 측정하기 위한 측정 함수를 제시하였다. 제안된 보정 기법은 수치지도위에 있는 다각형들을 기반으로 하며 각 다각형의 커널을 구한후 커널의 무게 중심에 대해 다각형을 부채꼴 모양의 삼각형으로 나눈 다음 삼각형 매핑을 적용하는 것이다. 다각형 외부에 위치한 시설물에 대해서도 동일한 방법을 적용하기위해 제한된 딜로니(Delaunay) 삼각 분할을 이용하여 외부 영역을 다각형으로 만들어 주는 방법을 제시하였다. 제안된 측정 함수는 지리 객체의 특성을 결정짓는 세가지 중요한 요소인 객체들간의 방향적(directional), 위상적(topological), 거리적(metrical) 관계을 이용한다. 제시한 기법의 성능을 평가하기 위해 테스트 데이타를 이용하여 알고리즘을 적용하고 그 결과를 측정 함수로 측정하여 분석하였다.

수치지도 불일치 해결을 위한 자동 보정 알고리즘

조미경(Cho Mi Gyung),조환규(Cho Hwan Gue) 한국정보처리학회 1998 정보처리학회논문지 Vol.5 No.1

Rubber sheeting is the one of basic problems in Geographical Information System(GIS), which is a mapping procedure to reslove mismatches between two similar geographic maps representing the same region with a few mismatches. Mismatches are resulted due to the diversity of database sources, the methodology of map production and state of update of information. In this paper we propose a new rubber sheeting algorithm for resloving these mismatches, which degrade the quality and accuracy of GIS. The basic idea of our algorithm is that we triangulate a polygon using the centroid of kernel area of a polygon. And for the objects outside polygons we propose one method to convert the outside areas into the set of polygons by constrained Delaunay triangulation. Also we propose new measure functions to evaluate the performance of rubber sheeting. Measure functions are based on three properties, namely topological, directional and metrical property, which represents the characteristics of the spatial information. Several experiments with real data show that our algorithm preserves topological, directional and metrical properties of a map during transformation as well as geometric accuracy.

PDA상에서의 한글 필기체 매칭 알고리즘

조미경(Mi Gyung Cho),조환규(Hwan Gue Cho) 한국정보과학회 2002 정보과학회논문지 : 소프트웨어 및 응용 Vol.29 No.9·10

Electronic Ink is a stored data in the form of the handwritten text or the script without converting it into ASCII by handwritten recognition on the pen-based computers and Personal Digital Assistants(PDAs) for supporting natural and convenient data input. One of the most important issue is to search the electronic ink in order to use it. We proposed and implemented a script matching algorithm for the electronic ink. Proposed matching algorithm separated the input stroke into a set of primitive stroke using the curvature of the stroke curve. After determining the type of separated strokes, it produced a stroke feature vector. And then it calculated the distance between the stroke feature vector of input strokes and one of strokes in the database using the dynamic programming technique. We did various experiments and our algorithm showed high matching rate over 97.7% for only the Korean script and 94% for the data mixed Korean with the Chinese character. 전자 잉크 데이터는 펜 기반 컴퓨터나 PDA(Personal Digital Assistants)등에서 자연스럽고 편리한 데이터 입력을 제공하기 위해 펜으로 입력한 데이터를 온라인 문자 인식기를 이용하여 아스키 문자로 변환하지 않고 스크립트 형태로 저장하는 데이터를 말한다. 전자 잉크 데이터를 사용하기 위해 가장 중요한 것 중 하나는 전자 잉크 데이터의 검색 문제이다. 본 연구에서는 전자 잉크 데이터를 획 특징 벡터 형태로 저장하고, 이를 이용해서 잉크 데이터를 검색하는 매칭 알고리즘을 제안하고 구현하였다. 제안된 매칭 알고리즘은 입력된 데이터를 곡률(curvature)을 이용하여 기본획(primitive stroke)으로 분리하고 기본획의 종류를 결정한 다음 획 특징 벡터를 생성한다. 그리고 동적 프로그래밍 기법에 의해 획 특징 벡터의 거리값을 계산한다. 제안된 매칭 알고리즘을 이용하여 다양한 실험을 하였으며 한글 스크립트로 구성된 경우 97.7%이상의 매칭률을 보여 주었고 한글 및 한자 혼합 스크립트에서는 94%이상의 매칭률을 보여 주였다.

Phytotoxin Production of Nigrospora sphaerica Pathogenic on Turfgrasses

Gyung Ja Choi,Jin-Cheol Kim,Mi Jeong Shon,Heung Tae Kim,Kwang Yun Cho 한국식물병리학회 2000 Plant Pathology Journal Vol.16 No.3