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김고운(Go-Un Kim),문창권(Chang-Kwon Moon),윤한기(Han-Ki Yoon),김부안(Bu-Ahn Kim) 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6
In this study, two different Al2O3 ceramics were prepared containing 15 wt% and 30 wt% of SiC nanoparticles. Surface crack was made at the center of specimen by vickers indentation. Crack healing behavior of Al2O3 ceramics was investigated by changing the loads of SiC nanoparticles and iterative crack-heat treatment process. The test samples were characterized by three-point bend flexural tests to evaluate their mechanical properties. The morphological changes were studied by scanning electron microscopy(SEM). The results indicated that : 1) The crack healing ability of the Al2O3 ceramics with 30 wt% of SiC nanoparticles were much higher than that of the Al2O3 ceramics with 15 wt% of SiC nanoparticles. 2) The cycle of indentation and treatment process revealed that the cracks of the Al2O3 ceramics were completely healed only 24.5N of vickers indentation load applied. 4) The SEM images showed that the median cracks were completely disappear due to the oxidation reaction.
김고운 ( Kim Go-un ),김수진 ( Kim Soo Jin ) 한국간호과학회 정신간호학회(구 대한간호학회정신간호학회) 2017 정신간호학회지 Vol.26 No.1
Purpose: The purpose of this study was to identify characteristics of the experience of maintaining employment for people withmental disabilities. Methods: The research design was a descriptive design using Q-methodology, which is a method of measuring subjectivity. Twenty-one participants classified 34 selected Q-statements on a nine-point scale to create a normal distribution. The PC-QUANL software program(a factor analysis program for the Q technique) was used to analyze the Q-sort data. Results: Three types were extracted that described different expressions of the experience of maintaining employment for people with mental disabilities; these types explained 52.3%of the total variance. Type I is `Workplace support`, Type II is `Self-management`, Type III is `Experience integration`. Conclusion: The results of this study provide an understanding that there are different types of experiences for maintaining employment for people with mental disabilities and each type has certain characteristics. In future studies, it would be helpful to develop customized nursing interventions for psychiatric nurses while occupational rehabilitation services are being provided.
김고운 ( Go-un Kim ),장경수 ( Kyoung-soo Jang ),임형우 ( Hyungwoo Lim ),김은혜 ( Eun-hye Kim ),이계한 ( Kye-han Lee ) 한국산림과학회(구 한국임학회) 2018 한국산림과학회지 Vol.107 No.2
본 연구는 제주도에 생육하고 있는 개가시나무(Quercus gilva Blume)에 대한 유전적 다양성을 분석하여 보전전략을 수립하기 위한 기초데이터 마련을 목적으로 하였다. 제주도 내 5집단 80개체를 대상으로 ISSR (Inter Simple Sequence Repeat) 분석을 시행하였다. 총 6개의 ISSR 프라이머를 이용하여 72개의 증폭산물을 관찰하였으며 그 중 67개의 증폭산물이 다형성이 있는 것으로 나타났다. 집단 수준에서의 다형적 유전자좌의 비율은 93%로 나타났으며, S.I. (Shannon’s information index)=0.237, h (Nei’s genetic diversity)=0.156로 나타났다. AMOVA 분석 결과 F<sub>st</sub>는 0.169의 값을 보여 집단 간 분화가 큼을 나타냈다. 전체 유전변이의 17%가 집단 간 차이, 나머지 83%는 집단 내 개체 간에 존재하는 것으로 보여 집단 간의 변이보다 집단 내 변이가 더 큰 것으로 나타났다. 이와 같은 연구결과를 바탕으로 개가시나무 서식지의 산림유전자원보호구역 지정 및 지속적인 모니터링, 생육환경의 개선을 통한 치수의 생장력 강화, 현지 외 유전자원 보전 및 현지 외 개체군과의 환경적·유전적 차이 비교를 통한 보전방안을 마련해야할 필요성이 있을 것으로 사료된다. This study was to analyze the genetic diversity of Quercus gilva Blume growing in Jeju Island for developing a preservation strategy. We examined the genetic diversity and structure using 6 ISSR primers and investigated 67 polymorphic ISSR amplicons in 80 trees distributed among five populations. The average of proportion of polymorphic loci were 93%, the average level of Shannon’s information index was 0.237, and Nei’s genetic diversity was 0.156. According to the analysis of the molecular variance (AMOVA), F<sub>st</sub> was 0.169 indicating there was a genetic variation among five populations. 17% of the total variation was allocated among the five populations, while the other 83% of the total variation was in individual trees in each population. The result could be due to the uneven number of trees among the five populations. Based on these results, the preservation strategy could be developed, for examples, considering for designation as “forest genetic resources conservation area” about the habitat, monitoring continuously, fostering the growth of seedling, ex situ preservation of genetic resources, and comparing the differences of environmental and genetic characteristic with population in ex situ.
조현병 환자의 삶의 질 관련 중재에 대한 통합적 문헌고찰
김고운 ( Kim Go-un ),정은영 ( Jung Eun Young ) 한국간호과학회 정신간호학회(구 대한간호학회정신간호학회) 2018 정신간호학회지 Vol.27 No.1
Purpose: The purposes of this study are to review the literature on quality of life intervention programs and to recommend further research and clinical considerations to improve the quality of life among patients with schizophrenia. Methods: Three electronic databases - PubMed, CHINAHL and RISS - were searched using the search terms of “schizophrenia” AND “quality of life” AND “intervention<sup>*</sup>” OR “program<sup>*</sup>.” The search was limited to studies published in English and Korean. Results: Ten studies were selected for the final analysis and evaluated in terms of contextual and methodological quality. The 10 studies consisted of 5 randomized controlled trials, 4 quasi-experimental studies, and 1 case report. The selected studies utilized an educational program, art and music therapy, physical activity therapy, and community-based integrated programs to alleviate psychological symptoms and showed effectiveness in improving quality of life. Conclusion: Interdisciplinary interventions and programs using multiple components reduced psychological symptoms and improved the quality of life of patients with schizophrenia.
정수 슬러지로부터 제조된 촉매 상에서 부탄올 탈수반응을 통한 부텐 제조
김고운 ( Go Un Kim ),배정현 ( Jung Hyun Bae ),최현희 ( Hyeon Hee Choi ),이철호 ( Choul Ho Lee ),전종기 ( Jong Ki Jeon ) 한국화학공학회 2015 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.53 No.1
본 연구의 목적은 정수 슬러지로부터 제조된 다공성 물질의 촉매 기능을 평가하기 위한 것이다. 촉매의 구조적 특성은 질소 흡착-탈착 등온선, 주사 전자 현미경 및 X선 회절을 이용하여 조사하였다. 정수 슬러지로부터 제조된 촉매는 메조 기공과 미세 기공을 동시에 보유하고 있으며, 촉매의 비표면적은 157 m2/g이다. 촉매의 산특성은 암모니아 승온탈착법과 피리딘 흡착 적외선 분광법으로 분석하였다. 고정층 촉매 반응기에서 2-부탄올의 탈수 반응을 수행한 결과, 350 oC의 반응 온도에서 1-부텐, 트랜스-2-부텐 및 시스-2-부텐의 수율은 각각 25.6 wt%, 19.2 wt% 및 29.9 wt%이었다. 정수 슬러지로부터 제조된 촉매의 2-부탄올 탈수 반응 활성은 브뢴스테드 산점와 루이스 산점으로 이루어진 산점을 보유한 것에 기인한다. 부탄올의 탈수 반응에 의해 C4 올레핀을 제조하는 반응에서 정수 슬러지로부터 제조된 촉매의 활용 가능성을 확인하였다. The objective of this study is to evaluate the catalytic potential of the porous material prepared from water treatment sludge. The textural properties of the catalyst were studied using N2 adsorption and desorption isotherms, scanning electron microscope, and X-ray diffraction. The pellet-type catalyst prepared using water treatment sludge is determined to be a material that contains mesopores as well as micropores. The specific surface area of the catalyst is 157 m2/g. Acidic characteristics of the catalyst are analyzed by temperature-programmed desorption of ammonia and infrared spectroscopy of adsorbed pyridine. 2-Butanol dehydration reaction was carried out in a fixed bed catalytic reactor. Yields of 1-butene, trans-2-butene, and cis-2-butene at 350 oC were 25.6 wt%, 19.2 wt%, and 29.9 wt%, respectively. This catalytic activity of the catalyst based on water treatment sludge in 2-butanol dehydration is due to the acid sites composed of Bronsted acid sites and Lewis acid sites. It was confirmed that the catalyst based on water treatment sludge can be utilized to produce C4 olefin through butanol dehydration.
중년성인의 자살생각 관련 요인 : 2016∼2017년도 국민건강영양조사의 2차 자료분석
김고운(Kim, Go-Un),김수진(Kim, Soo Jin) 전남대학교 간호과학연구소 2020 Nursing and Health Issues(NHI) Vol.25 No.2
Purpose: This study aimed to identify the prevalence of suicidal ideation and influencing factors among Korean middle-aged men and women through the use of national health statistics. Methods: This study employed statistical data extracted from the 2016-2017 Korean National Health and Nutrition Examination Survey, and subjects were 3,008 middle-aged men and women, aged 40-65 years. The following variables were included in survey items: marital status, education, current employment status, income, living arrangement, smoking, drinking, sleep duration, chronic disease, depression, and counselling. Data were analysed utilizing a complex sample multiple logistic regression analysis with the SPSS/WIN 25.0 program. Results: The prevalence of suicidal ideation was found to be 3.0% in middle-aged men and 5.1% in middle-aged women. Influencing factors of suicidal ideation among middle-aged men included current employment status (OR=0.44, 95% CI=0.20∼0.96) and whether they had received counselling (OR=9.38, 95% CI=2.47∼35.54), while other factors such as high income levels (OR=0.35, 95% CI=0.13∼0.93), upper-middle income levels (OR=0.35, 95% CI=0.16∼0.77), if respondents were drinkers (OR=3.18, 95% CI=1.20∼8.47), and if they had received counselling (OR=8.58, 95% CI=1.79∼41.04) were related to suicidal ideation among middle-aged women. Conclusion: The results of this study show that influencing factors of suicidal ideation in Korean middle-aged men and women are different. Therefore, taking these findings into consideration, it may be helpful to tailor interventions according to gender. In addition, healthcare providers should assess suicidal ideation and provide interventions without discriminating against those who receive mental health counselling, regardless of whether they are men or women.