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고순도로 합성된 나노콜로이드 티타늄옥사이드의 BN 파우더 코팅에 관한 연구
장혜인 ( Hyein Jang ),이경철 ( Kyungchul Lee ),홍성호 ( Sungho Hong ),지홍근 ( Hongkeun Ji ),이승화 대한화장품학회 2002 대한화장품학회지 Vol.28 No.1
High concentrated TiO<sub>2</sub> nano colloids were synthesized by sol-gel method. Reactions were performed in TiCI<sub>4</sub>/HCI/H<sub>2</sub>O aqueous solution and the conditions of particles such as shape, size and aggregation, etc. were controlled by polymerization and adsorption of acrylamide in surface of TiO<sub>2</sub> nano particles. And also, aminopropyltriethoxysilane was added instead of acrylamide and compared each other. The prepared colloids were well dispersed and showed the strong absorption peaks at 350nm-370nm which is blue shifted to 20-30nm, compared to macro particles. The obtained techniques from TiO<sub>2</sub> nano colloids synthesis were utilized in coating on boron nitride powders which are nonpolar and isoelectronic materials of carbon. Their surface morphology, structure, thermal stability and U.V absorption characteristics were examined by SEM(Scanning Electron Microscopy), XRD(X-ray diffraction), TG/DTA(Thermogravimetric and Differential Thermal Analysis), UV-VIS(Ultraviolet- Visible Spectroscopy).corresponding auther(e-mail:shlee6914@hanmail.net)
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이갑님,장혜인,김재희,Lee, Gabim,Jang, Hyein,Kim, Jaehee 대한예방한의학회 2013 대한예방한의학회지 Vol.17 No.3
Objectives : The aim of the study was to investigate major satisfaction, career choices and perceived career barriers in college students majoring in alternative medicine. Methods : A total of 315 college students majoring in alternative medicine in 5 universities in K city and J province completed survey questionnaires. Results : The highest proportions of students (38.4%) chose alternative medicine major because of their aptitude and interest. Students (59.0%) were satisfied in general with their majors. Regarding career direction after graduation, the highest proportions 1st of and 2nd year students answered that they haven't decided yet (33.7%). In addition, they wanted to get a job in hospitals (24.6%) and have more education (21.9%). The highest proportions of 3rd and 4th year students wanted to get a job in hospitals (31.3%) and 27.3% of them wanted to have more education. The most important criterion for choosing a career was a career aptitude (38.7%) followed by professionalism, vision, pay, and social status in both groups. Regarding perceived career barriers, the highest proportions of 1st and 2nd year students (31.6%) answered the lack of social recognition about alternative medicine while the highest proportions of 3rd and 4th year students (55.5%) answered the lack of national certifications (P<0.001). Conclusions : In general, students majoring in alternative medicine were satisfied with their majors. They wanted to get a job at a hospital and have more education. They thought that the lack of social recognition and national certification of alternative medicine would be career barriers.
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초기 청소년기 정서행동문제의 종단적 변화에 따른 잠재프로파일 분류 및 전이 영향요인 분석
김빛나 ( Bitna Kim ),장혜인 ( Hyein Jang ),박주희 ( Ju Hee Park ) 대한가정학회 2022 Human Ecology Research(HER) Vol.60 No.1
Using a person-centered approach, the current study investigated latent profiles for the emotional and behavioral problems of students in sixth-grade in elementary school and second grade of middle school. The aim was to explore latent transition patterns and verify the factors affecting the transitions. The participants were 1,937 adolescents who responded to the 3<sup>rd</sup> year (6<sup>th</sup> grade of elementary school; Time 1), 4<sup>th</sup> year (1<sup>st</sup> grade of middle school), and 5<sup>th</sup> year (2<sup>nd</sup> grade of middle school; Time 2) of the Korean Children Youth Panel Study. Latent profile and latent transition analyses were performed. The results were as follows: first, the latent profile of emotional and behavioral problems changed from Time 1 to Time 2. The latent groups at Time 1 were classified into low, moderate, high, and externalizing-dominant, whereas at Time 2, five groups were identified: low, moderate, high, externalizing-dominant, and withdrawal-dominant. Second, transition analyses revealed that although 22.3-57.0% of latent groups remained unchanged, there were significant changes over time between groups, as a new group (‘withdrawal-dominant’) emerged in Time 2. Third, different factors influenced the latent profile transition of emotional and behavioral problems depending on the transition pattern. Higher levels of self-esteem, better relationships with peers and teachers, and lower levels of parental inconsistency meant emotional and behavioral problems had not worsened at Time 2. The results suggest that early interventions are needed during the transition from childhood to early adolescence.
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