http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
방사선취급 병원근무자들의 염색체이상 및 자매염색분체교환 빈도
차애리,김미선,황인경,이수일,조병만,김돈균,Cha, Ae-Ri,Kim, Mi-Sun,Hwang, In-Kyung,Lee, Su-Ill,Cho, Byung-Mann,Kim, Don-Kyoun 대한예방의학회 1998 예방의학회지 Vol.31 No.4
In order to evaluate the cytogenetic hazard among hospital workers potentially exposed to low dose of radiation, the analysis of chromosome aberrations(CA) and sister chromatid exchanges(SCE) in lymphocytes were performed in 79 hospital workers and 79 non-exposed workers. The mean frequency of chromosomal exchange and deletion(respectively, $0.20\times10^{-2}/cell\;and\;0.39\times10^{-2}/cell$) in the exposed group were significantly higher than those$(0.07\times10^{-2}/cell\;and\;0.23\times10^{-2}/cell)$ in control group. The frequency of sister chromatid exchanges was 5.04/cell in the control vs. 6.57/cell in the exposed group. There were also significant differences in the mean frequencies of CA and SCE adjusted for age, sex, smoking, drinking between two groups. There were no evidence of significant increase of CA and SCE according to the department or duration of employment. But the frequency of cells having chromosome aberration was significantly higher in the exposed group than in the control group related to duration of employment. There was no dose-effect relationship between the cumulative doses and the frequency of CA and SCE. But in the case of last 1 yr cumulative dose, there were evidence of significant dose-dependant increase of chromosome type CA and percentage of cells with aberration. The result suggest that there is cytogenetic hazard in risk group like hospital workers handling low dose radiation. And the analysis CA and SCE are useful biological indicators for the exposure of low dose level of radiation.
보육시설 이용 어머니의 격리불안 측정 도구 개발 및 평가
차효성(Cha, Hyo Sung),고지현(Ko, Jihyun),이경주(Lee, Kyoung Ju),최애리(Choi, Aelee),이건정(Lee, Gunjung) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.1
본 연구의 목적은 보육시설을 이용하는 어머니의 격리불안을 측정하는 도구를 개발하고, 개발된 도구의 타당성을 검증하는 것이다. 도구의 개발은 예비문항 구성, 타당도와 신뢰도 검정을 거쳐 칙종문항을 추출하였다. 예비문항은 문헌고찰과 인터뷰를 통해 구성하였고 내용타당도는 5명의 전문가에게 검정을 받았다. 확정된 설문지를 이용하여 편의추출 방법으로 204명의 보육시설이용 어머니로부터 자료를 수집하였다. 문항분석과 탐색적 요인분석, 확인적 요인분석으로 구성타당도를 검정하였다. 탐색적 요인분석과 확인적 요인분석결과 6개 요인으로 수렴되었으며, 최종적으로 도출된 도구는 보육시설 이용 어머니의 죄책감(5문항), 보육시설 안전(5문항), 보육교사 신뢰(5문항), 보육시설 이용 아이의 불안(4문항), 보육시설 이용 아이와의 상호작용 불안(4문항), 보육시설 관리(3문항)의 총 26문항으로 구성 되었다. 본 도구의 신뢰도 Cronbach's a는 .93이다. 결론적으로 본 도구는 타당도와 신뢰도가 검정된 보육시설 이용 어머니의 격리불안 측정에 적합한 측정도구로 볼 수 있다. The aim of this study was to develop and validate an instrument to measure the separation anxiety of mothers who use child care facilities. The scale was developed as follows: initial items generated, validity and reliability tests performed, and final items extracted. The initial items were developed through a literature review and interviews. The content validity was verified by five experts. Using a final questionnaire, the data was collected from 204 mothers who used child care facilities with a convenient sampling method. The construct validity was evaluated by item analysis, exploratory factor analysis and confirmatory factor analysis. The results of confirmatory and exploratory faιtor analyses showed that the separation anxiety consisted of 6 factors: the mother's guilty feelings (5-items), safety of child care facilities (5-items), trust of teachers (5-items), child's anxiety (4-items), interaction with the child (4-items), and management of child care facilities (3-items). The separation anxiety scale for mothers using child care facilities consisted of 26 items. The reliability of the developed scale was examined. The Cronbach's a coefficient was 0.93. These results show that this scale is a valid and reliable instrument for measuring the separation anxiety level of mothers who use child care facilities.
유태석,차애리,박호규,김문환,Yoo, Tae Suk,Cha, Ae Ri,Park, Ho Gyu,Kim, Moon Hwan 한국정보통신학회 2022 한국정보통신학회논문지 Vol.26 No.12
In this paper, we design a navigation filter for an underwater glider. Underwater gliders are low-cost, reusable, and can be used for a long time. Two types of filters are designed considering characteristics such as small size, low cost, and low power. The navigation filter estimates the reference velocity of the underwater glider's body frame based on the minimum sensor output. The sensor configuration of the first filter consists of an accelerometer, a magnetometer, and a depth sensor. the second filter include extra a gyroscope in the same configuration. The estimated velocity is fused with the attitude, converted into the velocity of the navigation frame and finally the position is estimated. To analyze the performance of the proposed filter, analysis was performed using Monte Carlo numerical analysis method, and the results were analyzed with standard deviation (1σ). Standard deviations of each filter's position error are 334.34m, 125.91m.
이철호,박정래,차애리,고광욱,김영욱,이수일 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.2
Low back pain in computer terminal operators is a very common but important symptom. While the occupational risk factors of low back pain were approved obscurely, there have been few studies on analysis or understanding of occupational risk factors. Therefore, we studied occupational risk factors of low back pain, especially for ergonomic factors as well as general characteristics of workers. We selected 98 subjects for this study, computer terminal operators ordinary using computers in Pusan. We calculated the subjective severity of low back pain of each operator by the Low Back Pain Scoring System. The relation of low back pain score to general characteristics of worker was also analyzed. We analyzed the relationship between low back pain score and individual efforts to prevent low back pain. We measured the ergonomic factors of each computer terminal operator-Trunk Inclination(TI), Arm Flexion(AF), Elbow Angle(EA), Head Tilting(HT), Knee Angle(KA), using of foot plate and gap between the popliteum and chair. The correlations between these ergonomic factors and low back pain score were then analyzed. And the results are as follows: 1. The prevalence rate of low back pain in computer terminal operators was 39.8% in this study, when low back pain score was converted by the low back pain scoring system. 2. According to general characteristics of workers related to low back pain, the scores were higher in the older age group, the married and the longer work carriers.(p<0.05) 3. In the analysis of the relationship between low back pain score and individual effort to prevent low back pain, regular exercise, history of schooling for prevention of low back pain, and declaration of intention to participate in low back pain education or exercise were stastistically significant(p<0.05). And the more severe the low back pain, the higher the intention to participate in low back pain education they had in this study. 4. In the analyses of relationships or correlations between low back pain score and each of the 7 categories of ergonomic factors, only head tilting had a weak reverse correlation with low back pain(r=0.2999, p<0.01). From now on, cohort studies for the risk factors of low back pain of workers, who have been forced to work in non-ergonomical positioning at the work site, will be necessary. On the background of these ergonomic studies, the occupational health profession should be required to manage ergonomic working conditions.