• Journal of the Korean Statistical Society
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• 제28권4호
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• pp.489-501
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• 1999

In this paper, we consider the panel data regression model in which the disturbances have nested error component. We derive a Lagrange Multiplier(LM) test which is jointly testing for the presence of random individual effects and nested effects under the normality assumption of the disturbances. This test extends the earlier work of Breusch and Pagan(1980) and Baltagi and Li(1991). Further, it is shown that this LM test has the same asymptotic distribution without normality assumption of the disturbances.

• 대한인간공학회지
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• 제18권2호
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• pp.71-79
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• 1999

An experiment was conducted to study the PWC(Physical work capacity) of Korean females. A submaximal technique using the Ramp test protocol was used to measure the PWC. A cycle ergometer and a treadmill were used to assess the workload. The estimated PWCs of Korean females in terms of maximum oxygen consumption(${\dot{V}}o_2Max$) from the experiment were 1818.79ml/min in cycle ergometer test and 2076.33ml/min in treadmill test, respectively. The PWCs of Korean females were compared with those of western and oriental females. The PWCs of Korean females were about 2/3 of Korean males, 72%-82% of western females, and about 118% of South-east Asian females after applying age correction factor.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2003년도 봄 학술발표회 논문집
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• pp.902-907
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• 2003

Substantial experimental and theoretical work exists on the bond characteristics of FRP-concrete adhesive joints. Analytic solutions based on fracture mechanics are most commonly accepted for theoretical work on joint. The solutions may be derived for the simple form of the shear strees-slip curve. And it is difficult to determine the model parameters consisting the curve. In this study, the bilinear curve with softening branch is introduced. The model parameters are determined by the method described by the companion paper with comparison of test results. There are many uncertainties in the test results of CFRP sheet adhesive joints, so that test results used for the construction of the regression problem should be reasonably selected.

• 한국초전도저온공학회:학술대회논문집
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• 한국초전도저온공학회 2003년도 추계학술대회 논문집
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• pp.167-170
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• 2003

This paper presents the results of a series of performance tests for the Stilting cryocooler. A free piston and free displacer(FPFD) Stilting cryocooler for cooling infrared and cryo-sensors is currently under development at KIMM. Our coolers are specifically designed to work in the thermal imaging device and to meet requirements such as cooling capacity, COP and high reliability. In this work, Stilting cryocooler is designed, manufactured and fabricated, and performance characteristics for the vibration, acoustic noise, EMI and leak rate are evaluated. Vibration outputs are measured to 20KHz for compressor and expander, respectively. And, the objective of noise test is a noise level, less than 30㏈ at 5 m. EMI tests are carried out according to the standard MIL-STD-461C tests RE01 and RE02. Leak test for the Stilting cryocooler is performed by bombing method.

• Journal of Nutrition and Health
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• 제35권2호
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• pp.263-271
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• 2002

The purpose of this study was to determine the standard work time of dietetic staff through work sampling methodology in school flood service systems. Work measurement through work sampling methodology was conducted in five conventional, five commissary and five joint management flood service systems over two consecutive weeks in October 1999. Statistical analysis was performed on the SAS/Win 6.12 package program for Kruskal-Wallis test and multiple comparison. Observed data were satisfied with a confidence level of 95% and a confidence interval of $\pm$ 0.05. The results of this study can be summarized as follows. The actual time spent by dietetic staff members in conventional, commissary, joint-management flood servile systems was 2,394, 2,521 and 2,110 minutes per week, respectively. Transportation time of each flood service systeml and ILO allowance rate (11%) was applied. Thus, the standard work time per week of dietetic staff members in conventional, commissary, joint-management flood service systems was 2,746.14, 2,861.58 and 2,520.81 minutes, respectively. The standardized index was 1.04, 1.08 and 0.95 men in conventional, commissary, and joint-management flood service systems, respectively. Regardless of the school flood service system, those with "the duty of cooking and distribution management" had the longest labor time, while those with "duty of nutritional education" had the shortest labor time.

• Journal of Information Technology Applications and Management
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• 제22권2호
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• pp.71-93
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• 2015

Due to the rapid development of information communication technology, employees have conducted their tasks with smart devices such as smartphones and tablet PCs in the midst of after work hours. In line with this phenomenon, we have examined the relationships among technostress, work connectivity behavior after hours (WCBA) and technostress inhibitors and job satisfaction. Based on the results of prior research, we developed and tested our research model which posits the certain factors such as technostress, WCBA and technostress inhibitors affect work-life conflicts which, in turn influence employees' job satisfaction. Survey data collected from 345 users who have experiences on using smart devices was used to test the model using PLS (partial least squares). In this study, we found that technostress and WCBA were positively related to the work-life conflicts. We also found that the relationship between technostress inhibitors and job satisfaction was significant. The implications of these findings for both research and practice are discussed.

• 한국보건간호학회지
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• 제17권2호
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• pp.212-223
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• 2003

The purpose of this study was to investigate work stress and identify the various factors affecting stress in married women in working manufacturing industries. Data were collected between March 31 and June 28, 2003 from 266 married women working in 10 manufacturing industries in Korea. The self-administered questionnaire included general characteristics. social support, and work stress. The data were analyzed using descriptive statistics, t-test, ANOVA, and Cronbach's alpha. SPSS/win 11.0 was used to assist analysis. The results of the study are as follows: 1. Scores for work stress in the field of sub-categories 2. Perceived work stress was significantly different according to salary, behavior type, discomfort related to menstruation, consumption, duty type, job stability, weekly work time and family, 3. Social support had a significant negative relationship with work stress. Accordingly, stress management for married working women will be more successful if interventions not only address each person's unique needs, for example, control of perimenstrual discomforts and health behavior change, but also are accompanied by organizational management strategies and policies, for example, improvement of work environment and nursery facilities.

• Human Ecology Research
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• 제54권5호
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• pp.541-550
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• 2016

This study explored a typology (or time allocation), investigated personal and work characteristic differences among time allocation types, and identified determinants of time allocation types of married working women with a preschool child. The data source for this research was the 2014 Time Use Survey conducted by Statistics Korea. We analyzed 368 time diaries (184 for weekdays and 184 for weekends) using frequency, mean, cluster analysis, chisquare, analysis of variance (ANOVA), Duncan's test, and multinomial logistic analysis. The results of this research are as follows. Time allocation of married working women with a preschool child was classified into three different types of 'work-centered,' 'work-family balanced,' and 'family-centered.' The work-centered type accounted for 14.7% of total respondents, and compared with other types, this type of people spent more time working, and less time doing house-work, caring for family, and having leisure. The work-family balanced type represents more than half of the total, and spend more time working on weekdays and house-working, having leisure on weekends. The family-centered type represents 28.8%, and spends most of the time doing house-work and caring for family on both weekdays and weekends. Occupation, employment status, monthly income, and weekly hours of work were different for each type. Occupation, employment status, perception of lack of time, health condition, and weekly hours of work were identified as determinants for each type.

• 한국콘텐츠학회논문지
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• 제10권3호
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• pp.355-363
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• 2010

본 연구의 목적은 이론적 배경과 선행연구를 통해 호텔직원의 근로가치관이 직무몰입에 미치는 영향을 살펴보는 것이다. 본 연구를 위해 회귀분석이 이용되었는데, 연구결과는 내적근로가치관이 직무애착, 직무책임감, 직무중요성에 유의한 영향을 주었고, 외적근로가치관도 직무애착, 직무책임감, 직무중요성에 유의한 영향을 주었다. 이 연구는 개인의 태도와 행동에 영향을 주는 근로가치관에 대한 이해와 분석, 활용을 통하여 조직목표 달성을 위한 조직구성원들의 행동관리의 효과를 높일 수 있을 뿐 아니라 가치관에 대한 분석을 통해 조직 내에 서로 다른 가치관을 소유하고 있는 조직구성원들의 문제를 이해하고 해결하는데 직접적으로 활용할 수 있을 것이다.

• 한국콘텐츠학회논문지
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• 제21권8호
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• pp.537-545
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• 2021

본 연구는 직장 내 질투심을 조절변수로 하여 리더-종사원 교환이론과 서로 다른 두 개의 조직 행동, 즉 직장 내 일탈 행위와 조직시민행동의 관계를 살펴본 연구이다. 연구 결과, 직장 내 일탈 행위와 리더-종사원 교환이론 간 직장 내 질투심이 조절변수로 작용한 것을 알 수 있었다. 즉, 직장 내 질투심이 높을 때 리더-종사원 교환이론과 직장 내 일탈 행위의 관계가 부정적인 것을 확인하였으나, 리더-종사원 교환이론과 조직시민행동 사이에서는 직장 내 질투심의 조절변수가 없는 것으로 나타났다. 총 139명의 서비스 종사원들을 대상으로 연구를 하였고, 관련 산업에서의 실무적인 방향과 후속 연구에 대해 논의하였다.