• KDI Journal of Economic Policy
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• 제26권2호
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• pp.143-178
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• 2004

엄밀한 성장요인 분석을 위해서는 취업자수 및 인적 물적 자본스톡 뿐 아니라 취업자의 평균 취업시간 및 취업시간 변화에 따른 노동능률의 변화를 동시에 고려하여야 한다. 본 연구에서는 구간별로 발표되고 있는 주당 취업시간별 취업자수 통계에 최우추정법을 적용하여 총취업자의 단위 기간당 취업시간의 분포를 추정하고, 임금통계를 이용하여 단위 기간당 취업시간 변화에 따른 노동의 능률변화패턴을 추정한 후, 이를 결합하여 1963~2003년 기간중 총취업자의 주당 취업시간과 노동능률지표를 추정하였다. 추정결과에 따르면 주당 취업시간이 40시간일 때에 노동의 능률이 최대화되며, 1963~2003년 기간중 노동능률지표의 연평균 증가율은 0.14%로 계산되었다.

• Journal of Advanced Marine Engineering and Technology
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• 제22권6호
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• pp.792-799
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• 1998

Further improvement of existing $H_{2}O/LiBr$ absorption refrigeration machine is absolutely neces-sary to promote the utilization of gas-cooling system Among various methods to improve the per-formance of the absorption refrigeration machine this research has focused on the use of a new working fluid that has better properties than the existing $H_{2}O/LiBr$ working fluid. In the series of the research, $H_{2}O/LiBr+HO{(CH_{2})}_{3}OH$ system was selected as the most promisable candidate. The absorption refrigeration machine is water-cooled double-effect, $H_{2}O/LiBr+HO{(CH_{2})}_{3}OH$ sys-tem with series flow type. In this study we found out the characteristic of new working solution through the cycle simulation and compared the result with that of LiBr solution to evaluate. Theoptimum designs and operating conditions were determined based on the operating constraints and the coefficient of performance. Results demonstrate that new working fluid subsrantially increases COP by as much as 10% and has a wider working range with 8% higher crystallization limits compared to the conventional $H_{2}O/LiBr$.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2014년도 제46회 동계 정기학술대회 초록집
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• pp.346.1-346.1
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• 2014

Porous nano crystalline $TiO_2$ is currently used as a working electrode in a dye-sensitized solar cell (DSSC). The conventional working electrode is comprised of absorption layer (particle size:~20 nm) and scattering layer (particle size:~300 nm). We inserted window layer with 10 nm particle size in order to increase transmittance and specific surface area of $TiO_2$. The electrochemical impedance spectroscope analysis was conducted to analysis characterization of the electronic behavior. The Bode phase plot and Nyquist plot were interpreted to confirm the internal resistance caused by the insertion of window layer and carrier lifetime. The photocurrent that occurred in working electrode, which is caused by rise in specific surface area, increased. Accordingly, it was found that insertion of window layer in the working electrode lead to not only effectively transmitting the light, but also increasing of specific surface area. Therefore, it was concluded that insertion of window layer contributes to high conversion efficiency of DSSCs.

• 말소리와 음성과학
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• 제8권2호
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• pp.41-48
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• 2016

The purpose of this study is to evaluate the association among articulation rate, speech intelligibility and working memory in children with dysarthria. Two subject groups of 11 spastic and 11 flaccid dysarthria, respectively, aged between 8 and 17 years of age participated in this study. All participants were administered the following tests: K-WISC III PIQ test, speech intelligibility, working memory and articulation rate. Group differences were compared by an independent t-test. Pearson correlation were computed between all measures. The results of this study are as follows: First, articulation rate and intelligibility were significantly lower for the spastic dysarthria than for the flaccid dysarthria. Second, there was a significant correlation between articulation rate and intelligibility in children with flaccid dysarthria. Lastly, there was no significant correlation between articulation rate and working memory in both groups. The results suggest that articulation rate is not necessarily accompanied by working memory capacity in children with dysarthria, and there are differences in the effect of articulation rate on intelligibility depending on the type of dysarthria.

• 보건행정학회지
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• 제26권3호
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• pp.219-225
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• 2016

Background: Intention to leave was an important managerial issue among physicians working in public health centers. This study was conducted to explore the relationship between job participations and intention to leave among physicians working in health centers. Methods: A cross-sectional questionnaire survey was conducted to gather information about job participation, intention to leave and demographics among physicians (n=243) in public health centers in Korea. Job participation was measured by 15 items categorized 3 dimensions. Multiple regression analysis was performed to determine the effect of job participation on intent to leave among physicians working in public health center. Results: Participation of medical treatment and administrative job were significantly associated with intention to leave adjusted for sex, age, income, working area, working duration, tenure, and overall job satisfaction. Therefore, physicians who actively participated in administrative job showed a lower turnover intention. Physicians who actively participated in medical treatment job had a higher quit intention. Conclusion: To retain qualified physicians in public health center, education should be reinforced to physician for administrative capacity building.

• 한국치위생학회지
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• 제12권1호
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• pp.67-79
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• 2012

Objectives : The study was carried out to find out the experience of musculoskeletal disorder symptoms of dental hygienists and evaluate the risk with ergonomic evaluation method(RULA). Methods : The subjects in this study were 344 dental hygienists working at dental clinics and general hospitals in Seoul, Gyeonggi, Daejeon and Chungnam/Chungbuk. The data were collected through the self-questionnaire survey from July 26th 2010 to September 30th 2010. Results : The results showed that those who working at dental hospital, network dental clinics, with 1-5 years of clinical experience, long working hour and sitting hour, no rest hour, more physical and mental burden had higher rate of the experience of musculoskeletal disorder symptoms compared with other groups. The final score of RULA evaluation results was 6 on average requiring continuous observation and urgent demand for work improvements. According to the result of RULA evaluation by work, the orthodontic clinics were 4.5, prosthodontic clinics were 5.0, and dental surgery clinics were 6.8 being the most risky. Conclusions : The study showed high complaints rate on musculoskeletal disorders in dental hygienists. Thus, various measures including provision of proper working and rest hours, use of ergonomic working equipments, strengthening the health education for desirable working posture and the development of musculoskeletal disorder prevention program should be needed.

• 대한가정학회지
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• 제42권4호
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• pp.69-84
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• 2004

The purpose of this study was to compare the grandmothers' role performance toward their grandchildren in the elementary school between working and nonworking mother families. The subjects were 274 grandparent-grandchild pairs. The structured questionnaires, from both grandmothers and grandchildren were collected in 2001. Using statistical techniques such as factor analysis, t-test, Pearson's correlation, and multiple regression analysis, the major findings were as fellows: 1) The level of the grandmothers' role performance is moderate in general. However, the grandmothers in working mother families perform surrogate mother roles more strongly than the grandmothers in nonworking mother families.2) While contact between grandmother and grandchild is associated with the grandmother's role performance in working mother families, the grandmother's age and the closeness between grandmother and mother are related to the level of the grandmother's role performance in nonworking mother families. In conclusion, the grandmothers' role performance in working mother families was found to be more important in the supporting system than in nonworking mother families.

• 한국직업건강간호학회지
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• 제4권호
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• pp.39-47
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• 1995

In order to investigate the effects of family nursing intervention on workers' working attitude, the questionnaire survey was carried out on 31 workers who had experienced family nursing intervention and 31 workers who did not have experienced family nursing intervention. The structured questionnaire was constituted of 3 parts of the workers' working attitude, job satisfaction, interpersonal relationship and creativeness. The results were as follows ; 1. Mean score of working attitude for post-intervention was significantly higher in the intervention group(3.48) than in the control group(3.03). However, there was no significant difference that for pre-intervention between two groups. 2. Mean scores of the job satisfaction, interpersonal relationship and creativeness were significantly higher in the intervention group(4.12, 3.58, 4.06) than in control group(3.49, 3.09, 3.34) 3. The major contributing factor to the effect of family nursing intervention was sex(18.2%) and followed by nursing intervention(13.2%) in general. The major contributing factors were sex and working evaluation records in post-intervention in job satisfaction(15.1%), and nursing intervention and sex in creativeness (39.2%).

• 한국식품조리과학회지
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• 제25권6호
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• pp.725-738
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• 2009

The purpose of this study was to investigate the effects of working conditions on internship satisfaction. Hotel & Restaurant management students at universities in Jeonju participated in this study. Out of 156 questionnaires, 149 were analyzed using SPSS 17.0 and descriptive analysis, frequency test, factor analysis, reliability test, chi-square, t-test, ANOVA, duncan's multiple regression analysis, correlation analysis and regression analysis were used. Based on the result of the conducting factor analysis, the working conditions were classified into 2 factors: work suitability and work environment. Internship satisfaction was classified into 3 factors: internship preference, education and work satisfaction, company satisfaction. Cronbach's alpha was calculated for the reliability of the survey instrument. Consequently, the working conditions were shown to affect internship satisfaction. Among the working conditions, work suitability had a lower effect on internship satisfaction than work environment. At the resort used in this study, the salary level was high, but the level of work environment, internship preference, and company satisfaction was low. The students wanted attend an internship program at the desired place to be hired and found that it was more important to be assigned to the desired department than having a higher salary.

• 대한안전경영과학회지
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• 제10권4호
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• pp.31-38
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• 2008

Recently, there are many research of musculoskeletal disorders in manufacturing industry because of increasing interest of that disorders, but the research is still lacking in the small business and service industry. So we researched relationship between working characteristics and subjective symptoms associated with musculoskeletal disorders by get information of 145 hairdresser about working hour, work record, position and working pattern. The results of this research show that there are many musculoskeletal disorders of hairdressers' neck, shoulder, arm, knee and also close relationship between working characteristics and subjective symptoms associated with musculoskeletal disorders. Besides, some parts of subjective symptoms have an effect on other parts of body. This information contributes to future reference and a precautionary measure about musculoskeletal disorders for hairdressers.