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몇가지 페닐 알카놀의 Sodium Dodeylsulfate 수용액 미셀내에서의 가용화 위치
정종재,강정부,이경희,Jeong, Jong Jae,Gang, Jeong Bu,Lee, Gyeong Hui 대한화학회 1994 대한화학회지 Vol.38 No.3
Sodium dodecylsulfate(SDS) 0.2M수용액 미셀내에 몇 가지 페닐 알카놀$[C_6H_5(CH_2)_nOH;$ 페놀(n=1), 벤질 알코올(n=1), 펜에틸 알코올(n=2), 3-페닐-1-프로판올(n=3)]이 가용화(solubilization)될 때 이들의 가용화 위치를 이차원 이핵 상관 NMR분광법(Two dimensional heteronuclear correlation spectroscopy (2D C-H COSY)으로 조사하였다. 실험 결과 $^1H$-NMR 신호의 적분에 의하여 조사한 이전의 연구결과보다 훨씬 정량적이며 정확한 가용화 위치를 알 수 있었다. 이들이 SDS 미셀 중심의 중간부 메틸렌기에 침투하는 깊이는 ${\alpha}$메틸렌기로부터 6.5~7.0 단위까지 임을 알았다. The solubilization sites of some phenyl alkanols such as phenol, benzyl alcohol, phenethyl alcohol, 3-phenyl-1-propanol solubilized in 0.2 M aqueous sodium dodecylsulfate micelle solution was studied by two dimensional heteronuclear correlation spectroscopy (2D C-H COSY). The results show more quantitative and clear solubilization sites in the SDS micelle than previous results using $^1H$-NMR spectrum integration. We found that most of the phenyl alkanols penetrate into the core of SDS micelle, and the insertion depth was 6.5∼7.0 methylene units from ${\alpha}$-methylene.
정종덕(Chung Jong-Duk),김정국(Kim Jeong-Guk),홍용기(Hong Yong-Ki),이동형(Lee Dong-Hyung),편장식(Pyun Jang-Sik) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
The deterioration of a shunting locomotive was characterized for the lifetime assessment. The locomotive has been used for shunting works in steel making processes, and in this investigation, various types of technical evaluation methods for the locomotive parts were employed to assess the current deterioration status and to provide important clue for lifetime prediction. Unlike other rolling stocks in railway applications, the diesel shunting locomotive is composed of major components such as diesel engine, transmission, gear box, brake system, electronic devices, etc. In this paper, the degree of deterioration in a diesel engine and power transmission parts has been presented based on the analysis results.
개선된 퍼지 C-Means 클러스터링을 이용한 고장전류판별에 관한 연구
鄭鍾元(Jong-Won Jeong),李浚柝(Joon-Tark Lee) 대한전기학회 2008 전기학회논문지 Vol.57 No.11
This paper demonstrates a enhanced FCM to identify the causes of ground faults in power distribution systems. The discrimination scheme which can automatically recognize the fault causes is proposed using Fuzzy RBF networks. By using the actual fault data, it is shown that the proposed method provides satisfactory results for identifying the fault causes.
$trans-[Cr(en)_2Br_2]^+$ 착이온의 수화반응에 미치는 용매효과와 그 반응메카니즘
정종재,이성호,백성오,Jeong, Jong Jae,Lee, Seong Ho,Baek, Seong O 대한화학회 1990 대한화학회지 Vol.34 No.2
메탄올-, 에탄올-, 아세토니트릴-, 아세톤-물 등의 혼합용매에서 $trans-[Cr(en)_2Br_2]^+$착이온의 반응속도상수를 20, 25, 30 및 35$^{\circ}C$에서 분광광도법으로 구하였다. 반응속도상수는 온도가 증가함에 따라 증가하고 공용매의 조성이 증가함에 따라 감소하였다. 속도상수는 공용매의 유전상수의 역수값과 아무런 관계도 보이지 않았다. Grunwald-Winstein식의 m값은 메탄올-, 에탄올-, 아세토니트릴- 및 아세톤-물 혼합용매에서 각각 0.109, 0.103, 0.101 및 0.095이었다. 물과 공용매에서 착이온이 초기상태에서 전이상태로 진행되는 자유에너지사이클로부터 전이상태의 용매화가 속도에 지배적인 영향을 미친다는 것을 알 수 있었다. 위의 결과로부터 이 착이온의 수화반응메카니즘은 Id메카니즘으로 진행된다고 추정하였다. The rate constants for the solvolysis of $trans-[Cr(en)_2Br_2]^+$ ion were determined by the spectrophotometric method in methanol-, ethanol-, acetone-, and acetonitrile-water mixtures, at 20, 25, 30, and 35$^{\circ}C$, respectively. The rate constants increased with increasing co-solvent compositions. The rate constant did not show any relation with the reciprocal of dielectric constant of the solvent-mixtures. The m values of Grunwald-Winstein equation for methanol-, ethanol-, acetonitrile-, and acetone-water mixtures are 0.109, 0.103, 0.101, and 0.095, respectively. A free energy cycle for the process from the initial state to the transition state in water and water + co-solvent mixtures shows that the change in solvation at the transition state has a dominant effect on the rate. From the above results, it is believed that the mechanism for the aquation of this complex is the Id mechanism.
일 정신병원의 알코올리즘 치료 프로그램의 중도 퇴원 환자들의 특성
정종일(Jong-Il Jeong),한우상(Wou-Sang Han),전미경(Mee-Kyung Jun),이기원(Gi-Won Lee),김태우(Tae-Woo Kim),김진영(Jin-Young Kim),신경철(Kyung-Chul Shin) 한국중독정신의학회 2004 중독정신의학 Vol.8 No.2
Objective:This study was performed to compare the sociodemographic, clinical variables, self-efficacy, drinking motive, personality characteristics such as impulsivity, sensation-seeking, and insight between the completion group and dropout group. Subjects and Methods:Subjects served for the study were 63 Korean alcoholic patients who participated in an alcoholism treatment program. All subjects were assessed using the Seoul National Mental Hospital Alcoholism Screening Test, the alcohol use inventory, the drinking motive questionnaire, the Barratt impulsivity scale, the Zuckerman sensation seeking scale, the self-efficacy scale, and the Hanil Alcohol Insight Scale. Results:In summary, the results of this study were as follows:1) 29 of the 63 subjects were dropped out, so the dropout rate was 46.1.%. 2) The numbers of patients who completed program was significantly higher among patients of semivoluntary admission than among patients of either voluntary or involuntary admission. 3) There was a relative tendency, not so prominent in a statistical sense, that the drinking style is more severe in the dropout group, 4) The incident of alcohol-related medical diseases was significantly higher in the dropout group than in the completion group. 5) The number of patients who completed the program was significantly higher in the ‘fair insight group’ than in either the ‘poor insight’ or ‘good insight group’. 6) In the dropout group, the scores of all drinking motives were higher than in the completion group. It was especially noted that the enhancement and conformity motive scores were significantly higher in the dropout group than in the completion group. 7) In the completion group, there were no correlations among drinking motives, AUI subscales, and HAIS score. However, in the dropout group, each drinking motive correlated with the AUI subscales in a different pattern; additionally, the coping motive correlated with the HAIS score. 8) The most common reasons noted for dropout were psychosocial ones, lack of interest in the program, and difficulties to follow the program. Conclusions:Between the completion group and dropout group, there were some differences in the mode of admission, drinking style, alcohol-related medical diseases, insight level, drinking motives and in their correlation pattern with the AUI subscales and HAIS scores. Considering these characteristics and the reasons of dropout, we can improve future treatment program adherence.
정종원(Jong-Won Jeong),지석준(Suk-Joon Ji),이준탁(Joon-Tark Lee),김광백(Kwang-Back Kim) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
RBF 네트워크의 중간층은 클러스터링 하는 층으로 주어진 자료 집합을 유사한 클러스터들로 분류하는 것이다. 여기서 유사하다는 것은 입력 데이터들에 대한 특징 벡터 공간사이에서 한 클러스터내의 벡터들 간에 거리를 측정하여 정해진 반경 내에 존재하면 같은 클러스터로 분류하고 정해진 반경 내에 존재하지 않으면 다른 클러스터로 분류한다. 그러나 정해진 반경내에서 클러스터링 하는 것은 잘못된 클러스터를 선택하는 단점을 가지게 된다. 그러므로 중간층을 결정하는 것은 RBF 네트워크의 전반적인 효율성에 큰 영향을 준다. 따라서 본 논문에서는 효율적으로 중간층을 결정하기 위한 방법으로 퍼지 C-Means 클러스터링 알고리즘을 이용하고자 하였다. 그리하여 본 논문에서는 고장 전류의 특성을 해석하여 그 원인을 판단, 분류하기 위하여 전력계통의 고장 기록 장치로부터 얻어지는 선로의 전류 데이터를 FCM을 이용 분류하여 다양한 고장 모드를 판별할 수 있었다.