• 한국산업보건학회지
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• 제24권2호
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• pp.208-218
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• 2014

Objectives: The major objective of this study was to develop and validate a tier 1 exposure model utilizing worker exposure monitoring data and characteristics of worker activities routinely performed at construction sites, in order to estimate worker exposures without sampling. Methods: The Registration, Evaluation, Authorization and Restriction of Chemicals(REACH) system of the European Union(EU) allows the usage of exposure models for anticipating chemical exposure of manufacturing workers and consumers. Several exposure models have been developed such as Advanced REACH Tools(ART). The ART model is based on structured subjective assessment model. Using the same framework, a tier 1 exposure model has been developed. Worker activities at construction sites have been analyzed and modifying factors have been assigned for each activity. Korean Occupational Safety and Health Agency(KOSHA) accrued work exposure monitoring data for the last 10 years, which were retrieved and converted into exposure scores. A separate set of sampling data were collected to validate the developed exposure model. These algorithm have been realized on Excel spreadsheet for convenience and easy access. Results: The correlation coefficient of the developed model between exposure scores and monitoring data was 0.36, which is smaller than those of EU models(0.6~0.7). One of the main reasons explaining the discrepancy is poor description on worker activities in KOSHA database. Conclusions: The developed tier 1 exposure model can help industrial hygienists judge whether or not air sampling is required or not.

• 한국산업보건학회지
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• 제27권3호
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• pp.245-256
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• 2017

Objectives: The present study is aimed at performing real-time measurement of fibrous materials using an F-1 fiber monitor, investigating the correlations between the measurements and environmental conditions, and assessing the feasibility of the use of the monitor in actual exposure assessments based on the accuracy and reliability of the device. Methods: Asbestos specimens with a fixed asbestos content were dispersed in a chamber and collected with a particle measuring test device. Measurements obtained by the existing PCM method, and with the F-1 fiber monitor were compared. In addition, concentrations of asbestos fibers obtained by the PCM method, the TEM method, and the F-1 fiber monitor were compared with that of specific ABS scenarios in NOA regions. Correlations of asbestos contents in soil and weather conditions with each method of measurement were analyzed. Results: Laboratory results showed that levels of asbestos fibers measured with each method increased as fiber contents in soil increased. In the accuracy and reproducibility assessment, no significant differences were found between the different methods of measurement. On-site assessment results showed positive correlations among the methods, and these correlations were less significant compared with what was shown by the laboratory results. Levels of asbestos fibers increased as asbestos contents in soil increased, and as temperature increased. Levels of asbestos fibers decreased as humidity increased, and wind speed did not significantly affect the extent to which asbestos fibers were scattered. Conclusions: While it would be premature to replace existing methods with the use of F-1 fiber monitors in real sites based on the results of this study, the monitor may be useful in the screening of the sites, which assesses hazard levels in different regions. Replacement of existing methods with the use of F-1 fiber monitors may be possible after the limitations identified in this study are overcome, and additional assessment data are obtained and reviewed under different conditions to confirm the reliability of the monitor in future research. Obtained assessment results may be used as basic data for the assessment of asbestos hazard in NOA regions.

• 한국콘텐츠학회논문지
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• 제11권6호
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• pp.337-349
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• 2011

연구의 목적은 다문화가정 이주여성의 여가관 분석을 규명하는데 있다. 이 연구는 2010년 경기도 대전 충남 충북 지역 소재 다문화가정지원센터 프로그램에 참가하고 있는 이주여성들을 모집단으로 선정한 다음 유의표집방법(purposive sampling method)을 활용하여 140명의 연구대상을 표집 하였다. 최종분석에 사용된 사례수는 총 89명이다. 설문지의 신뢰도는 Cronbach's ${\alpha}$ 값이 .613이상으로 나타났다. 결론은 다음과 같다. 첫째, 다문화가정 이주여성들의 평일 여가시간은 '1~2시간'이 가장 많다. 둘째, 다문화가정 이주여성들의 주말 여가시간은 '1~2시간'이 가장 많다. 셋째, 다문화가정 이주여성들의 여가활동만족은 '보통'이 가장 많다. 넷째, 다문화가정 여가활동 선호도는 '여행'이 가장 많다. 다섯째, 다문화가정 이주여성들의 여가활동 동반자로는 '배우자'가 가장 많다. 여섯째, 연령, 학력, 국적, 기간에 따라 다문화가정 이주여성들의 여가제약은 차이가 있다.

• 치위생과학회지
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• 제19권1호
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• pp.48-59
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• 2019

Background: The purpose of this study is to provide the data for discussions related to oral health promotion policies for single-person households by analyzing the status of unmet dental needs and related factors in single-person households in Korea, based on the Anderson model. Methods: The data, obtained from 544 single-person households of those over 20 years old who were targeted for the 6th Korea National Health and Nutrition Examination Survey, were analyzed through a complex sample frequency analysis, complex sample cross analysis (Rao-Scott chi-square test), and complex sample binary logistic regression analysis on a complex sampling design. Results: The most frequently given reason for an unmet dental need among single-person households was economic (52.4%). Factors related to the unmet dental needs of single-person households are smoking, which is a predisposing factor; personal income levels, which are an enabling factor; chewing discomfort; and limited daily activities, which are need factors. Smokers, the high-income group, the chewing-discomfort group, and the limited activity group showed high unmet dental care experience. Smokers had a 2.75 times higher rate of unmet dental care than non-smokers, and the high-income group had a 5.29 times higher rate of unmet dental needs than the median group. The rate of unmet dental needs for the chewing discomfort group was 3.27 times higher than the non-chewing discomfort group, and the limited activity group had a 7.87 times higher rate of unmet dental needs than the non-limited activity group. Conclusion: It is necessary to map out policies designed to help maintain and promote met dental needs considered to be internally heterogeneous to single-person householders, based on the Anderson model.

• 한국지능시스템학회논문지
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• 제18권2호
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• pp.151-156
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• 2008

본 논문은 뉴트럴 타입 시간 지연을 가지는 네트워크 기반 시스템의 안정도 분석 및 샘플치 퍼지 제어기 설계 방법에 관하여 논의한다. 먼저 대상이 되는 비선형 네트워크 시스템을 T-S (Takagi-Sugeno) 퍼지 모델로 표현한다. 제안하는 샘플치 퍼지 제어기를 모델링하는 퍼지 규칙과 같은 멤버쉽 함수를 가지게 설계한다. Lyapunov-Krasovskii의 안정화 이론을 도입하여 이를 바탕으로 뉴트럴 형태의 시간 지연을 갖는 T-S 퍼지 시스템의 안정도를 판별한다. T-S 퍼지 시스템의 안정도 조건을 제시하고 선형 행렬 부등식의 형태로 표현한다. 제안된 선형 행렬 부등식의 해를 통하여 샘플치 퍼지 제어기의 이득 값을 설계한다. 마지막으로, 본 논문에서 제안한 방법의 적용 가능성과 일반성을 평가하기 위하여 수치적인 예를 적용한다.

• 통합자연과학논문집
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• 제9권2호
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• pp.113-120
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• 2016

Monopolar spindle 1 (Mps1) is an attractive cancer target due to its high expression levels in a wide range of cancer cells. Mps1 is a dual specificity kinase. It plays an essential role in mitosis. The high expression od Mps1 was observed in various grades of breast cancers. In the current study, we have developed a CoMFA model of pyridazine derivatives as Mps1 kinase inhibitors. The developed CoMFA model ($q^2=0.797$; ONC=6; $r^2=0.992$) exhibited a good predictive ability. The model was then validated by Leave out five, progressive sampling and bootstrapping and found to be robust. The analysis of the CoMFA contour maps depicted favorable and unfavorable regions to enhance the activity. Bulky positive substitution at $R^3$ position and Negative substitution in $R^1$ position is favored could increase the activity. In contrast, bulky substitution in $R^1$ position is not favored. Our results can be used in designing a potent Mps1 (TTK) inhibitor.

• 기본간호학회지
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• 제10권3호
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• pp.345-353
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• 2003

Purpose: The purpose of this study was to explore the stress-coping process used by elderly people. Method: This study was based on the grounded theory methodology of Strauss & Corbin. The participants were 15 elders selected by theoretical sampling. Over a period of 3 months, in-depth interviews using audiotape recording were used to collect the data. The data were analyzed simultaneously by a constant comparative method in which new data were continuously coded in categories and properties according to Strauss and Corbin's methodology, Result: Stress in elderly people is caused by illness, family conflict, and loss of economic power. Stress occurred in connection with aging and limitation of social activity. The central incidents for stress were fear, alienation and anxiety. It was found that action/interactional strategies of stress-coping behavior were related to social support and mobility disorders. Action/interactional strategies to stress-coping in elderly people were dependent on medical treatment, mind control, participation of social activity, and renunciation of offensive behavior. Stress-coping in elderly people resulted in stability or instability in body and mind. Conclusion: It is suggested that the results of this study may contribute to the development stress-coping strategies for elderly people. There is need to develop social support systems and a positive environment to avoid negative coping strategies.

• 한국산학기술학회논문지
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• 제14권3호
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• pp.1090-1099
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• 2013

본 연구에서는 베이비부머의 사회활동 유형 별 삶의 만족도의 차이를 파악하는데 목적이 있다. 이를 위해 1955년에서 63년에 태어난 남녀 베이비부버 1,115명을 대상으로 하여 2011년 8-10월에 성별과 지역에 따른 할당표본을 하였다. 연구의 결과, 첫째, 베이비부머의 사회활동 유형은 3집단으로 나타났다. 36.8%가 속한 소극적 사회참여형은 소득활동이나 시민단체활동은 전혀 하지 않고 종교활동이나 가정내 활동을 하는 경우는 소수가 포함되었다. 주로 여성이 많고 후기베이비부머가 많고, 학력수준이나 가정소득이 다른 군집에 비해 낮으며 삶의 만족도 중간정도이다. 둘째. 33.8%가 속한 활동적 사회참여형은 소득활동을 포함하여 모든 사회활동에도 적극적이다. 여성이 많고 후기베이비부머가 많다는 점은 소극적 사회참여형과 유사하나 학력이나 가정 내 월평균 소득, 삶의 만족도 수준이 다른 군집에 비해서 가장 높다. 셋째, 29.4%가 속한 경제활동 중심형은 소득활동에는 참여하지만 문화활동, 시민단체활동, 교육활동, 혼자 시간보내기 등의 사회활동에는 참여하지 않는다. 전기와 후기베이비부머의 분포나 학력의 분포, 가정내 월소득은 다른 군집의 중간 수준이지만, 다른 군집과는 달리 남성이 많고 삶의 만족도 수준은 가장 낮다. 본 연구결과를 토대로 유형별로 베이비부머의 사회활동참여와 삶의 만족도를 향상시킬 수 있는 방안을 제시하였다.

• 농촌지도와개발
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• 제19권2호
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• pp.241-271
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• 2012

The objectives of this study were to explore the duties and tasks of educational program operation, to develop the performance model including the duties and tasks, and to construct the action manual of the tasks and duties in related with implementing effectively the educational program. The findings of this study were as follows. First, The identifying duties and tasks was 1,942 related with implementing educational program operation based on theoretical job model through activity analysis and experience sampling techniques. Second, the finding duties and tasks was reconstructed through classifying with 9 duties and 88 tasks, and then it was developed as educational program operation model of Korean Rural HRD Center. Finally Third, the implementing manual was constructed including the contents and task-elements.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1997년도 추계학술대회
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• pp.443-446
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• 1997

HRV(heart rate variability) is the time series data of R-R interval time duration based on ECGs. Power spectral analysis of HRV has recently been used to define the activity of ANS(autonomic nervous system). In this study, 14 rats were divided into two groups, sympathectomy and vagotomy. During the experiments, ECGs of rats were collected three times at each experimental conditions or the duration of 5 minutes, where sampling frequency was set at 2KHz. After the application of the Berger's Serires algorithm to ECG raw data, power spectrum of HRV was obtained via FFT. Results showed that HF/LF were increased or the sympathectomy group and decreased or the vagotomy group. It implies that the variations in HF/LF components could be used or the ANS function classification.