• Korean Journal of Construction Engineering and Management
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• v.11 no.3
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• pp.115-124
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• 2010

Along with the recent economic downturn, domestic construction companies have also faced with many difficulties and obstacles. To overcome this situations, now they are trying to continuous efforts to improve efficiency and productivity of project performance through many means including the reduction of fixed cost expenditures. Level of work performance of construction field managers is very important factor of productivity improvement for successive performance of construction project. This study attempts to analyse level and influence factors for work performance of field managers in construction companies through analysis of work burden and level of work performance. Also this study attempts to present basic data of the improvement directions for enhancing construction efficiency and productivity in future.

• Nuclear Engineering and Technology
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• v.50 no.4
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• pp.606-612
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• 2018

Many nuclear power plants in Japan are approaching the end of their planned operational life spans. They must be decommissioned safely in the near future. Using augmented reality (AR), workers can intuitively understand information related to decommissioning work. Three-dimensional (work-site) reconstruction models of dismantling fields are useful for workers to observe the conditions of dismantling field situations without visiting the actual fields. This study, based on AR and work-site reconstruction models, developed and evaluated an information reference system. The evaluation consists of questionnaires and interview surveys administered to six nuclear power plant workers who used this system, along with a scenario. Results highlight the possibility of reducing time and mitigating mistakes in dismantling fields. Results also show the ease of referring to information in dismantling fields. Nevertheless, it is apparently difficult for workers to build reconstruction models of dismantling fields independently.

• Journal of The Korean Society of Integrative Medicine
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• v.7 no.4
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• pp.105-117
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• 2019

Purpose : Using qualitative research and a phenomenological approach, the present study aimed to explore men's experiences of becoming a nurse. We posed the question "What has been your experience of becoming a nurse?" Methods : Eleven male nurses from three regions in Korea were selected through convenience sampling. The protocol suggested by Colaizzi was used for data analysis. Results : The principal themes were "Challenging to the stochastic stereotype of gender mechanics," "Floating outside the enclosure of multiple groups," "The male nurse's conceptualization of nursing organizations," "To stand with self-doubt, thinking of it as a stopover," and "Situations encountered by a male nurse." Conclusion : Men experience gender discrimination based on the social roles that are imposed on males and females both at school and in the workplace. They prefer to work where they have more diverse tasks that require quick responses. However, most male nurses adapt to this work by outlasting the difficulties. These nurses become accustomed to their tasks, and satisfied with their mature work performance. They often feel they are not adequately compensated for their work. They may judge the future as uncertain, and have lingering doubts about maintaining their positions, ultimately gravitating toward specialized fields that promise a brighter future and are more consistent with traditional gender expectations.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.37 no.4
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• pp.231-238
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• 2014

Optimum lot size calculation for real world manufacturing environment has been focused since last few decades. Several extensions have been made to the basic economic order and production order quantity models to realize the possible practical situations in industry. However, focus on work-in-process inventory has been ignored relatively. This paper provides a comprehensive review of the models developed for group technology based manufacturing environment focusing on work-in-process inventory. Models have been extended from a perfect manufacturing conditions to an imperfect manufacturing situation considering rework, rejection and inspection. Optimum lot size has been evaluated using a simple algebraic optimization approach. Significant parameters are highlighted using sensitivity analysis for the developed models. Numerical example is used to illustrate the utilization of such models in day-to-day production setups and the impact of significant factors' variation on total cost and optimum lot size.

• Korean Journal of Occupational Health Nursing
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• v.22 no.4
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• pp.295-304
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• 2013

Purpose: To identify work stress and job satisfaction of the emergency medical technician (EMT) and to contribute to the improvement of emergency care under the current emergency medical law. Methods: The data were collected by questionnaire from the total 849 EMTs (635 National emergency management agency (119) workers and 214 hospital workers) throughout the whole country from January 5, to March 5, 2012. Each level of indicator calculated under 100-point-scale was compared by t-test and ANOVA. Factors affecting stress and satisfaction were analyzed by Multiple Linear Regression Analysis (${\alpha}$=.05). Results: Mean level of job stress was markedly higher among 119 workers (76.9) than those in the hospital (56.6) (p<.001). Mean level of job satisfaction was higher among 119 workers (63.2) than those in the hospital (60.2) (p<.001). Conclusion: To diminish work stress and to increase job satisfaction, efforts to support the pride and to improve working condition considering the situations of the agency and to offer more education chance to keep and strengthen the specialty are needed.

• Journal of Industrial Convergence
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• v.3 no.2
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• pp.51-71
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• 2005

As the living standards have been enhanced thanks to rapid to rapid economic growth following industrial progress, today the advancement of woman into specialized jobs keep expanding not only for economic purpose such as increasing family income but also due to changed perception on woman's role, i.e. self-realization. In the actual situations, however, women are generally placed in a inferior position compared with men in most jobs, despite existence of gender equality policy. Therefore, concern and study on female adaptation into job and their work attitude have become increasingly important, which can contribute to alleviating women's discontent in the work but to raising efficiency of job execution and improving work quality. In this treatise, I researched the job attitude of woman for the period of 1980 up to 2005, with interval of every 5 years. For empirical analysis, research has been done towards females teachers in elementary and middle schools as well as female works in financial institutions. Both job fields have comparatively high percentage of female employees and have less sexual discrimination. The purpose of this vertical research is (1) to find out how women workers perceive their job environment, (2) to analyze empirically the change in female job attitude and their flow of consciousness. Ultimately this treatise aimed at contributing to efficient management of female work force in our society.

• IE interfaces
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• v.9 no.2
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• pp.75-82
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• 1996

A scheduling system is developed for a parallel machine flow shop which reflects the situations of the manufacturing processes in the tire industry. The schedule is generated via simulation using heuristic rules to get satisfaction on such constraints as due dates, demands, work-in-process, process capacity, set-up times and scheduling speed. This system, constructed with relational DB, SQL and C language, consumes less than 10 minutes of PC simulation to handle real size problems.

• 제어로봇시스템학회:학술대회논문집
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• 1993.10a
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• pp.749-753
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• 1993

It is very difficult to control batch reactor with conventional linear controller due to its severe nonlinearity. To control the nonlinearity of batch reactor, we applied with relay feedback method and SOAS. The SOAS can be designed to work quite well, but it requires engineering effect and some knowledge about the process in order to get a satisfactory performance of the closed loop system For the applications to more reliable, further studies on robustness in various situations and process noises and would be required.

• Journal of Korean Institute of Industrial Engineers
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• v.19 no.1
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• pp.39-46
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• 1993

In developing a multiple regression relationship, independent variables are frequently measured with error. For these situations the problem of estimating unknown parameters has been extensively discussed in the literature while little attention has been given to the prediction problem. In this paper a criterion is developed for assessing the severeness of measurement errors in each independent variable on the predicted values. Using the developed criterion we can present a guideline as to which measurement error should be controlled for a more accurate prediction. Proposed methods are illustrated with a standard data system in work measurement.

• Journal of the Korean Institute of Intelligent Systems
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• v.21 no.4
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• pp.506-511
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• 2011

In this paper we investigate some situations in connection with two exact sequences of fuzzy linear maps. Also we obtain a generalization of the work [Theorem4] of Pan [5], and we study the analogies of The Four Lemma and The Five Lemma of homological algebra. Finally we obtain a special exact sequence.