• Journal of the Korea Society for Simulation
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• v.2 no.1
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• pp.55-66
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• 1993

Although the Pontryagin's maximum principle theory is widely applied in control problems, its contribution to the solution procedure have been restricted just to figure out the rough picture of true solutions, probably due to the complexity of the two-point boundary value problems. This paper discusses a numerical approach to solve the control problems in connection with the two -point boundary value problems. A model of labor management negotiation during a strike has been constructed and solved explicitly by us of DVCPR subroutine introduced in IMSL. The results have been turned out that the management is better increase wage very slowly during the strike period, while , on the labor side, it is more effective to show the high intensity of demonstration against the company at the outset and gradually decrease it.

• Proceedings of the Korea Society for Simulation Conference
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• 1993.10a
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• pp.3-3
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• 1993

Although tile Pontryagin's maxlmum principle theory is widely applied in control problems, its contribution to the solution procedure have been restricted just to figure out the rough picture of true solutions, probably due to the complexity of the two-point boundary value problems.This paper discusses the numerical approach to solve the control problems in connection with the two-point boundary value problems. A model of labor-management negotiatulon during a strike has been constructed and solved explicitly by use of DVCPR subroutine introduced in IMSL. The results have been turned out that the management is better increase wage very slowly during the strike period, while, on the labor side, it is more effective to show the high intensity of demonstration against the company at the outset and gradually decrease it.

• Journal of the Korean Society of Tobacco Science
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• v.23 no.1
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• pp.90-93
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• 2001

In order to save hanging labor hours and reduce work intensity for bulk curing of the flue-cured tobacco, and electric hoist was developed. It consists of a pair of square steel frames with side plates and rolling casters to move back and forth on the second tire of bulk barn, and wire rope type lift was attached to the beneath of its top center. The lift driven by DC motor could be controlled by operating switch with one limit switch and control box, and a scissors shaped gripper was deviced to grip tobacco rack to the end of wire rope. As the results of experiments with electric hoist, labor hours for hanging could be saved by 30 to 40% as compared with those in conventional method. With simple and light structure, it was possible for even woman to load the harvested tobacco, and it could be recommended for farmers to use this device with reasonable price.

• The Journal of the Korea Contents Association
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• v.13 no.12
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• pp.470-483
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• 2013

The purpose of this study is to examine the relationship among the emotional labor, service commitment and customer orientation in hotel service context. Moreover, this study was designed to test the moderating effect of supervisor's emotional intelligence to provide fundamental and practical data for hotel industry. In this study, 4 hypotheses based on literature reviews were employed. A questionnaire was also developed based on previous studies. A convenience sample of 318 hotel employees was surveyed and a total of 297 usable questionnaires were analyzed. Then the data and hypotheses were examined using multiple regression analysis using SPSS 18.0. The results are as follows. Firstly, emotional labor was divided into 'emotional dissonance', 'emotional frequency', 'emotional diversity' and 'emotional intensity' according to the literature review. Analysis showed that emotional labor has partial effects on service commitment accordingly. Secondly, service commitment has positive effect on customer orientation. Thirdly, emotional labor has partial effects on customer orientation. Lastly, supervisor's emotional intelligence has partial moderating effects between emotional labor and customer orientation. Continuous and systematic training should be conducted to administer 'emotional labor'.

• Journal of the Korea Convergence Society
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• v.13 no.1
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• pp.269-282
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• 2022

The purpose of this study is not only to explore the effects of emotional labor on job stress but also to investigate the moderating effects of grit and social support between emotional labor and job stress. A survey was conducted for 804 call center counselors in Daegu, Daejeon and Suwon to figure out research questions, and the collected data were analyzed with SPSS 25.0. The results of the data analysis are as follows. First, emotional labor of customer counselors was found to have a positive effect on job stress. Second, in the relationship between emotional labor and job stress of customer counselors, grit showed different results according to sub-factors. The higher the Perseverance of Effort, the higher the job stress, and the higher the Consistency of Interest, the lower the job stress. Third, in the relationship between emotional labor and job stress of customer counselors, supervisor support of social support had a moderating effect, while peer support had no moderating effect. It shows that in order to prevent job stress of customer counselors, who have a high intensity of emotional labor, it is necessary to intervene to help them develop a positive perception of themselves through non-cognitive factors such as grit and the support provided by a trusted target. In addition, appropriate intervention methods and educational environment should be supported.

• Journal of the Korea Safety Management & Science
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• v.24 no.2
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• pp.11-16
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• 2022

When picking up cargo, workers manually load and unload the cargo. Workers have different intensity of work depending on the amount and weight of cargo. In particular, as the intensity of manual work increases, workers are exposed to cumulative traumatic diseases. A manual for picking safety work for workers cargo handling in the distribution center is required. In this study, the worker's picking safety work based on the cargo volume and weight was presented as an experimental design model. Like the research results, the disease begins when the worker feels the number of pains presented by the model.

• Women's Health Nursing
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• v.5 no.3
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• pp.277-286
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• 1999

Pain is a complex perceptual experience that is profoundly influenced by a number of variables, differing in quality as well as in intensity. Therefore we need to understand the actual experience of multiparous women in order to provide basic information for nursing care. The purpose of the study is to explore the experience of labor pain. The data are collected through in-depth interviews of 17 multiparous women in city of Pusan from October 1998 to March 1999. The interviews were conducted 1-2 days after delivery in the admission room. Each interview lasted about 45 minutes on average. Subjects were interviewed one at a time. The interviews were recorded with the consent of the subject. Data were analyzed by means of Giorgi's Phenomenological analysis methods and categorized according to the similarities of its contents. The investigator read the data repeatedly to identify themes and categories. Six categories that were identified were : 1) pain 2) regret 3) acceptance 4) maturity 5) accomplishment 6) newness. Under these categories there were seventeen themes. I. Pain: 1) too dependent on others 2) too painful 3) fear or anxiety from previous painful experience 4) avoidance of pain 5) couldn't control the pain II. Regret : 1) spouse's absence 2) unprofessional attitude of the staff 3) ignorance of other's towards their pain III. Acceptance : 1) took the pain for granted 2) accepted the pain as fate 3) endured the pain IV. Maturity : 1) appreciated the value of life 2) apprehension of parent V. Accomplishment : 1)is over sense of accomplishment 2) grateful the pain VI. Newness : 1) experienced a new feeling 2) quickly forgot the pain. The results of the study will provide basic data for labor pain management.

• Journal of the Korea Convergence Society
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• v.9 no.1
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• pp.67-74
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• 2018

The purpose of this study was to analyze the structural relationship among emotional labor and work performance of information security professionals. To this end, we conducted a questionnaire survey on 176 security workers and analyzed the collected data using structural equation modeling (SEM). It was found that the frequency of emotional display was positively related to deep acting and surface acting. Also, the intensity and variety of emotional display was positively related to deep acting and surface acting. In addition, deep acting had a positive relationship with work performance and surface acting had an significantly positive relationship with work performance. The results of this study are meaningful to understand the influence of the emotional aspect of security workers on work performance. Therefore, the overall findings suggest that the training programs and education for the improvement of emotional labor capacity of deep acting are continuously required.

• Korean Journal of Occupational Health Nursing
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• v.23 no.4
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• pp.277-286
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• 2014

Purpose: In this study, I am going to figure out Korean workers' actual exposure to risk factors and percentage of the workers who complain of health problems by performing a comparative analysis of the characteristics of the workers and working conditions in Korea and EU. Methods: The data used in this study includes the $1^{st}$ working conditions survey conducted in 2006 in Korea, the $2^{nd}$ working conditions survey in 2010, the $4^{th}$ EU working conditions survey, and the $5^{th}$ EU working conditions survey. I have compared the changes to Korean working conditions and those to EU working conditions in the categories of demographic characteristics, quality of labor, exposure to risk factors, and health problems included in the data. Results: The analysis of the characteristics of the demographic characters of Korean workers shows that aged and female workers register increased labor force participation. The analysis of labor quality shows that Korea has a long working time but with a lower work intensity compared to the countries included in EU working conditions survey. As for risk factors, Korea registers a low level of exposure as compared to countries included in EU working conditions survey and characteristically shows a decreasing exposure to tobacco smoke. The survey shows sharply increasing complaints of muscle pain in the upper and lower limbs. Conclusion: In this study, I have identified vulnerable social groups by using quantified values in a comparison of the working conditions of Korea and those of EU.

• Journal of Environmental Policy
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• v.11 no.1
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• pp.75-97
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• 2012

The purpose of the paper is to estimate the functions of the energy input efficiency and the energy intensity efficiency, and measure their energy efficiencies for the reduction of greenhouse gases focusing on OECD countries. The efficiency of the traditional energy intensity was rarely connected with the energy efficiencies of the stochastic frontier function. It seems that the energy efficiency by the function of energy input efficiency sensitively responds to the order of GDP, capital stock, labor, and energy input quantity as explanatory variables. In the future, we need to reduce energy quantities by the optimal mix of inputs, and pursuit low-carbon economic growth through the production of the goods consuming small energy.