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Dehydrogenative Polymerization of Hydrosilanes to Silicon Polymers
김명희,이준,모수용,김종현,우희권,Kim, Myoung-Hee,Lee, Jun,Mo, Soo-Yong,Kim, Jong-Hyun,Woo, Hee-Gweon The Basic Science Institute Chosun University 2010 조선자연과학논문집 Vol.3 No.2
Hydrosilanes possessing reactive Si-H bond are used in synthesizing various types of polysilanes by dehydrocoupling under the influence of various organometallic promoters. Catalytic Si-Si/Si-O coupling of hydrosilanes with hydrosilanes, alcohols, and lactones to silicon-based polymers are described in this article as selective examples of our recent research developments. These silicon-containing polymers can be used as a precursor to prepare useful functional materials for fabricating electronic devices.
김명희,이준,무수용,김종현,고영춘,우희권,Kim, Myoung-Hee,Lee, Jun,Moo, Soo-Yong,Kim, Jong-Hyun,Ko, Young Chun,Woo, Hee-Gweon The Basic Science Institute Chosun University 2010 조선자연과학논문집 Vol.3 No.1
Bis(silyl)alkylbenzenes such as bis(1-sila-sec-butyl)benzene (1) and 2-phenyl-1,3-disilapropane (2) were synthesized in high yields by the reduction of the corresponding chlorosilanes with $LiAlH_4$ in diethyl ether. The dehydrocoupling of 1 and 2 was performed using group IV metallocene complexes generated in situ from $Cp_2MCl_2$/Red-Al and $Cp_2MCl_2$/n-BuLi (M = Ti, Hf), producing two phases of polymers. The TGA residue yields of the insoluble polymers were in the range of 64-74%. The molecular weights of the soluble polymers produced ranged from 700 to 5000 ($M_w$ vs polystyrene using GPC) and from 500 to 900 ($M_w$ vs polystyrene using GPC). The dehydropolymerization of 1 and 2 seemed to initially produce a low-molecular-weight polymer, which then underwent an extensive cross-linking reaction of backbone Si-H bonds, leading to an insoluble network polymer.
Capture-recapture 방법을 이용한 1998년 제주도 볼거리 유행시 보고 자료의 완전성 평가
김명희,박진경,기모란,허영주,김정순,최보율,Kim, Myoung-Hee,Park, Jin-Kyoung,Ki, Mo-Ran,Hur, Young-Joo,Kim, Joung-Soon,Choi, Bo-Youl 대한예방의학회 2000 Journal of Preventive Medicine and Public Health Vol.33 No.3
Objectives : To estimate mumps incidence during the study period and to evaluate the completeness of case reporting. Methods : Capture-recapture methods, originally developed for counting wildlife animals, were used. The data sources were 1) the National Notifiable Communicable Disease Reporting System (NNCDRS; 848 cases), 2) the School Health Reporting System, temporarily administered by the Division of Education (SHRS; 1,026 cases), and 3) a survey of students (785 cases). We estimated the number of unobserved mumps cases by matching the three data sources and fitting loglinear models to the data. We then determined the estimated total number of mumps cases by adding this to the number of observed cases. Completeness was defined as the proportion of observed cases from each source to the total of estimated cases. Results : The total number of observed cases was 1,844 and the total number of estimated cases was 1,935 (95%, CI: $1,878\sim2,070$). The overall completeness was 43.8% of the NNCDRS, 53.0% of the SHRS, and 40.6% of the survey. However, completeness varied by area and age. Conclusion : Although the completeness of NNCDRS data appeared higher than in the past, it is difficult to generalize this result In Korea, it is possible to estimate the size of health hazards relatively cheaply and quickly, by applying capture-recapture methods to various data using a multiple data collection system.
김명희,Kim, Myoung-Hee 한국항해항만학회 2022 한국항해항만학회지 Vol.46 No.4
In this study, a multivariate time series analysis was conducted to identify various variables that impact ocean freight rates in addition to supply and demand factors. First, we used the ClarkSea Index, Clarksons Average Bulker Earnings, and Clarksons Average Tanker Earnings provided by the Shipping Intelligence as substitute variables for the dependent variable, ocean freight. The following ndependent variables were selected: World Seaborne Trade, World Fleet, Brent Crude Oil Price, World GDP Growth Rate, Industrial Production (IP OECD) Growth Rate, Interest Rate (US$ LIBOR 6 Months), and Inflation (CP I OECD) through previous studies. The time series data comprise annual data (1992-2020), and a regression analysis was conducted. Results of the regression analysis show that the World Seaborne Trade and Brent Crude Oil P rice impacted the ClarkSea Index. Only the World Seaborne Dry Bulk Trade impacted the Clarksons Average Bulker Earnings, World Seaborne Oil Trade, Brent Crude Oil Price, IP, and CP I on the Clarksons Average Tanker Earnings.
비실험자료를 이용한 연구에서 인과적 추론의 강화: 성향점수와 도구변수 방법의 적용
김명희,도영경,Kim, Myoung-Hee,Do, Young-Kyung 대한예방의학회 2007 예방의학회지 Vol.40 No.6
Objectives : This study attempts to show how studies using non-experimental data can strengthen causal inferences by applying propensity score and instrumental variable methods based on the counterfactual framework. For illustrative purposes, we examine the effect of having private health insurance on the probability of experiencing at least one hospital admission in the previous year. Methods : Using data from the 4th wave of the Korea Labor and Income Panel Study, we compared the results obtained using propensity score and instrumental variable methods with those from conventional logistic and linear regression models, respectively. Results : While conventional multiple regression analyses fail to identify the effect, the results estimated using propensity score and instrumental variable methods suggest that having private health insurance has positive and statistically significant effects on hospital admission. Conclusions : This study demonstrates that propensity score and instrumental variable methods provide potentially useful alternatives to conventional regression approaches in making causal inferences using non-experimental data.
김명희,허영주,최보율,기모란,Kim, Myoung-Hee,Hu, Young-Joo,Choi, Bo-Youl,Ki, Mo-Ran 대한예방의학회 2001 Journal of Preventive Medicine and Public Health Vol.34 No.1
Objectives : To describe the characteristics of a mumps epidemic in Cheju-do, 1998 and to identify the risk factors associated with mumps infection. Methods : To estimate attack rate, previously collected data from the Nationally Notifiable Communicable Disease Reporting System and School Health Reporting System, temporarily administered by Division of Education. as well as additional surveillance data were used. In order to identify the clinical characteristics and risk factors associated with mumps, we conducted a questionnaire survey in 17 schools (9 elementary, 4 middle, and 4 high schools) among a population that included healthy students. Results : From March 3 to August 31, 2,195 cases of mumps were identified, and patients under 20 years of age accounted for 2,162 cases (attack rate 13.2, 95% CI 12.6-13.7/1,000). The attack rate for the population under 20 years of age was the highest in Nam county (44.7/1,000), nod in the 7-12 years old sub-group(>20.0/1,000). There was no sexual difference. 80.5% and 59.7% of patients presented periauricular and submandibular swelling respectively. Aseptic meningitis was a complication in 2.9% of cases, orchitis in 1.3%, epididymitis in 0.9% and oophoritis in 0.6% respectively. The overall MMR vaccination rate was 59.1% and it decreased in accordance with increasing age. In students aged 10 years old or below, household contact and MMR vaccination status was significantly associated with infection, and only among students with household contact, the risk of one dose MMR(OR=10.22, 95% CI 2.92-35.78) and non-vaccination (OR=11.62, 95% CI 1.96-68.96) was significantly greater when. compared with that of two dose vaccination. Among students aged 11 years old or above, household contact history was significantly associated and MMR vaccination status was not associated. Conclusions : Low vaccination rate and vaccine failure were thought to predispose the population for this large outbreak. To prevent sustained mumps outbreaks, a second MMR vaccination should be encouraged and catch up vaccinations should be given to elderly children who remain susceptible.
김명희(Kim, Myoung-Hee) 서울대학교 철학사상연구소 2012 철학사상 Vol.45 No.-
노자의 글 체제는 무-유-만물의 구조로 이루어져있다. 이 중 ‘무’와 ‘만물’에 대한 해석은 비교적 통일된 반면 ‘유’에 대한 시각차는 현저하다. 그리하여 현재 논의되어 있는 노자의 도 개념은 논의자들에 따른 부분적 해석은 가능하나, 전체를 관통하고 있지는 못하다. 이에 필자는 노자 글 전체를 관통하는 새로운 해석 틀을 모색해 보고자 한다. 통일된 하나의 해석 틀을 갖기 위해서는 『노자』 속의 ‘무’와 ‘유’개념이 동일한 의미를 가지고 논리적 모순 없이 전개된다는 전제하에 출발한다. 그리하여 만물의 입장에서 보면 ‘무’와 ‘유’는 함께 본체로 상정되어 도는 단일 개념이 아닌 ‘무’와 ‘유’라는 복합 개념이 된다. 더불어 도에 대한 정의도 무가 유를 낳아 모자(母子) 관계를 이루고, 그러면서 이 둘은 또한 서로가 서로의 존재원인이 되어 함께 만물을 생하는 것으로 본다. 이것을 1장, 2장, 11장, 25장, 40장, 42장의 우주론적 성격이 강한 글들에 적용ㆍ관통시켜 필자의 주장을 뒷받침해 보았다. Lao-tzu老子’s writing structure consists of Wu(無)-You(有)-All things(萬物). Here, the interpretation of ‘Wu’ and ‘All things’ is relatively identical in most studies, whereas there is a great gap among the studies about ‘You’. Thus, the currently available concepts of Lao-tzu’s Tao differ from each other according to the presenters, and there is no clear-cut definition applicable to the respective chapters. So I will aim to find a new method of interpretation of Lao-tzu老子’s writing by assuming the existence of a clear-cut definition. I will conduct this study on the basis of the fact that the concepts of ‘Wu(無)’ and ‘You(有)’ of Lao-tzu老子 are the same and suffer from no logical errors when being developed so as to set a clear-cut definition. By doing so, from the point of view of All things, ‘Wu’ and ‘You’ are posited together as essence bases, so that Tao becomes, without being the single concept, the complex concept of ‘Wu’ and ‘You’. Also, the definition of Tao is set in a manner that ‘Wu’ bears ‘You’ to form a mother-child relationship, and the two bring about existence by creating All things together. In order to support my opinion, writings characterized by the cosmology in chapters 1, 2, 11, 25, 40 and 42 of 『Lao-tzu』 are referenced.
초등학생의 놀이성과 학교생활적응 관계에서 친사회성의 매개효과
김명희 ( Kim Myoung Hee ),류진아 ( Ryu Jin-a ) 대한아동복지학회 2021 아동복지연구 Vol.19 No.1
This study examined the mediating effect of pro-sociality on the relationship between play and school life adaptation of elementary school students. We verified the statistical significance of the mediating effect by dividing the data from the survey of 690 elementary school students into three stages according to the procedure suggested by Baron and Kenny (1986) and conducting hierarchical regression analysis. Results were: First, there was a positive correlation between elementary school students’ playfulness, pro-sociality, and school life adaptation. Second, the mediating model of pro-sociality was evident in the relationship between play and adaptation to school life of elementary school students, and both direct and indirect effects were significant. Third, the mediating effect of pro-sociality appeared directly and indirectly in the relationship between inquiring mind, sense of humor and school life adaptation, excluding social activeness among the sub-factors of play. In order to improve the adaptation to school life of elementary education, we suggested that counseling and education using playfulness and pro-sociality need to be performed, and made suggestions for follow-up research.
김명희(Kim Myoung Hee),심윤희(Sim Yun Hee) 한국유아교육·보육복지학회 2012 유아교육·보육복지연구 Vol.16 No.1
본 연구는 유아교육기관에서 부모가 인식하는 유아 평가의 의미와 그들이 평가에 참여함에 어떤 의미를 부여하고 그들이 직접 평가과정에 참여하는 양상을 알아보고자 한 것이다. 이를 위해 본 연구에서는 사랑어린이집 교사 2명과 어머니 6명을 관찰, 심층 면담하는 사례연구를 실시하였다. 연구결과 첫째, 부모가 지각하는 포트폴리오 평가는 객관적 성장발달자료, 근거 타당한 유아평가에 대한 새로운 발견, 유아 발달수준에 근거한 측정도구로 의미 짓고 있다. 둘째, 유아 평가참여에 대한 부모의 의미 부여는 아이발달에 대한 조화로움을 위해, 아이 성찰 그리고 부모의 자기반성으로, 가정연계학습의 강화로, 부모바람의 통로로, 심리적 부담감으로의 두 가지 엇갈린 반응으로 의미 지었다. 셋째, 포트폴리오 평가과정을 통해 나타나는 부모들의 참여양상은 부모의 개입정도에 따른 가정연계활동의 적극성과 부모의 프로젝트 흥미, 마음가짐에 따라 관련성이 있었고 유아의 반성적 사고에 따른 학습 및 프로젝트에서 새롭게 알게 된 유아의 흥미여부 그리고 유아의 발달상황에 대한 확인에 따라 주도성이 달라짐을 알 수 있었다. 또한 부모는 교사평가의 객관적 준거에 대한 일치와 다름에 근거하여 부모의 바램을 전달하는 교사와의 소통의 기회로 평가에 참여함을 볼 수 있었다. 따라서 의미 있는 포트폴리오 평가를 위해서 교사는 가족참여 방법을 변화시켜 부모가 유아의 평가와 교수를 이해하고, 능동적으로 참여하고, 지원할 수 있도록 해야 하며 이로써 교사와 부모 모두 유아의 흥미와 관심에 관한 평가를 진행하는 동반자로 자리매김해야한다. The purpose of this study is for the meaning of children’s assessment about the recognition of parents and the meaning of aspect from the participation of parents have got three major parts. In order to conduct this study participants were gathered as two teachers and six mothers who have been observed and interviewed in-depth from sarang-daycare center. Firstly, the meaning of portfolio from the participation of parents collected the data of objective and new development discovery about the growing up of early children and to compare by using the measuring instrument according to development of early children. Secondly, the reason for this study are to find the harmony of early children’s development of the reflection parents the learning of the life and the parental hope and the burden of mind. Thirdly parental attitude have shown many different type aspects as the following below.; We have known the positive of coordinate activity from between daycare center and home. Consequently, teachers will change the method of family’s participation and modify, parents have to understand that how to teach for early children for portfolio assessment. Above all, parents have to participate and support actively. And teachers and parents should have concerned about being a companion for early children’s interest and concern throughout portfolio assessment.
김명희 ( Myoung Hee Kim ) 한국독서학회 2007 독서연구 Vol.0 No.17
The purpose of the research is that one way of increasing reading skills of childrencould exists in counseling of reading problem. Through the counseling, I have anintension of searching for a solution to reading problem. Though we are nowemphasizing on the important of reading and leading the activity of reading, Manychildren are avoiding reading books and showing a maladjusted behavior ofreading.To search for this reason, I researched children(120) who had been taughtby teachers on reading and their parents(60) about the condition of reading inlifelong education institute of Jeon-Ju University in 2004. After the research, Iclassified these materials into some patterns according to a maladjusted behavior ofreading and counseled them with child psychology, remedial reading and aprinciple of counseling. After the counseling, A period of reading had beenincreasing when I observed a pattern of behavior and investigated it and Theinterest of reading was also shown higher than before. Through these studies, Isuggest a solution of the disorder in reading. As follow:First, It is needed to correct the children in light troubles and worries aboutmaladjusted behavior of reading so as to prevent this condition through arevitalization of reading. Second, A house and school should make a betteratmosphere for reading and lead revitalization of reading class in order to increasing a habit and interest of reading. Third, we should develop a reading method of promoting a talk, usage of media and programs based on a daily experience to make children get some interest in reading. Fourth, We should develope tools to estimate a maladjusted of behavior on the objective, Also, we need efforts to compare and analyze through going on collecting various data.