• Journal of Korean Physical Therapy Science
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• v.10 no.2
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• pp.145-152
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• 2003

Recruiting and maintaining capable physical therapists in hospitals is crucial to provide patients with better quality's physical therapy and to achieve hospital business objectives. This study is to provide basic data for effective personnel management of physical therapists in the hospital. For this, this study was conducted to confirm the relationship between turnover intention and job characteristics(task importance, job autonomy, job feedback, task identity, skill diversity), and to find out factors affecting the turnover intention of hospital physical therapists in Korea. The sample used in this study consisted of 173 physical therapists who were working in hospitals located in Seoul from June 18 to 29. The data for analysis were collected by questionnaire survey. The dependent variable of this study was turnover intention and the independent variables were job characteristics(task importance, job autonomy, job feedback, task identity, skill diversity), demographic characteristics of respondents(sex, age, education level, marital status, working hospital, working career). The major statistical methods used for the analysis were factor analysis, t-test, ANOVA, correlation, and hierarchical multiple regression analysis. Turnover intention according to demographic characteristics of respondents was significantly high in the graduate school above group. As the result of hierarchical multiple regression analysis of turnover intention, R2 of job characteristics was much more powerful than demographic characteristics. The factors had significant negative effect on turnover intention were job autonomy, task identity, and skill diversity. And in demographic characteristics factors, there were not significant factors on turnover intention. In considering above findings, for decreasing turnover intention of physical therapists, hospitals need to develop strategies for enhancing job satisfaction by improving job autonomy, task identity, and skill diversity from the adequate job environment.

• Journal of Physiology & Pathology in Korean Medicine
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• v.24 no.5
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• pp.877-882
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• 2010

This study was designed to investigate job stress, job satisfaction and related factors of oriental medical doctors. The survey used administered questionnaire, was conducted from June 10 to June 30, 2010 in Jeonbuk province. Questionnaire was composed of general characteristics, socioeconomic status perception, job stress scale and job satisfaction scale. Job stress was related to sex, age, marriage, working form, working time, clinical career. Job satisfaction was related to age. Working time, working form and self-status perception influenced job stress. Self-status perception influenced job satisfaction. Especially, it was supposed that working time was most important factor to job stress.

• Korean Journal of Human Ecology
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• v.16 no.1
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• pp.49-59
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• 2007

The purpose of the present study was to examine how working females evaluated and perceived the employer-supported child care services, and how the evaluations and perceptions were different depending on their socio-demographic characteristics. A survey was administered to 164 working females, mostly, in professional jobs, to investigate their satisfaction to the employer-supported child care service and current child care policy. Major findings are as follows: Working females showed higher degrees of satisfaction on the employer-supported child care service and showed lower degrees of satisfaction on the current child care polidy. The more they work in professional jobs and the more they have high educational background, the more they showed satisfactions to the employer-supported child care services.

• Journal of Applied Reliability
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• v.15 no.3
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• pp.181-191
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• 2015

Change in labor time is affecting occupational safety and health. Recently reduction in labor time brought innovational operation method, investment in plant and equipment, and flexible labor time in some companies, thereby affecting working conditions for labourers. However, working conditions for some vulnerable social groups have deteriorated. As a result, they are becoming more exposed to risk factors such as injury and emotional stress. In this study we use 2014 KWCS data in order to find the social and demographic characteristics in Korean working conditions. To this end, we use exploratory data analysis approach to find the relationship between some of the important variables in the KWCS data. We also use Press-State-Response model to find which group of people are vulnerable to Press and State. We find that women, people over age 50 and business owners are more vulnerable to Press and State than men, people below age 50 and wage workers.

• Proceedings of the KSME Conference
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• 2008.11b
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• pp.2110-2115
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• 2008

In this study, We disigned and manufactured the Hot Chuck which can be operated until $120^{\circ}C$. Its shape is circular, wide is 300mm and depth is 15mm. Two types working fluid was used as working fluid(distilled water, 0.1%-$TiO_2$ nanofluid). The experimental results were compared to each working fluid. The effect of various working fluid, charging volume ratio was investigated. Also we investigated heat transfer rate against each working fluid. By using nanofluid, heat transfer rate can be enhanced and the wick structure can be constructed automatically on smooth surface. The experiment of 40% charged 0.1%-$TiO_2$ nanofluid showed the best performance of thermal accuracy and uniformity. To improve performance of Hot Chuck, more study is needed.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.10 no.2
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• pp.137-146
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• 1998

The experimental study is concerned with two-phase closed thermosyphons, (i.e., wickless heat pipes) for the cooling of high power electronic components in telecommunication system. The thermosyphon which can deal with a high heat flux of up to $4.9W/cm^2$ is developed, and the cooling characteristics of thermosyphon is analyzed according to design parameters which are the types of and quantity of working fluid, number of pipes, wire insertion in pipe, inclination angle of thermosyphon, and cooling air velocity. Using water as working fluid is superior cooling performance compared to using acetone, and cooling performance is improved as the number of thermosyphon becomes larger, inserting wires in the pipes, and inclination of $30~60^{\circ}$.

• Journal of the Korean housing association
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• v.12 no.2
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• pp.87-95
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• 2001

The number of people working in their own home has been increasing, and this will change the form of house. Therefore, it is necessary to plan the new house for the people working at home, and to offer business related working area. This study was designed to know the office workers preference for spatial characteristics of home office. Data were collected through a questionnaire survey. The subject were 257 office workers living in Seoul area. Frequency, percentage, and MM2 : $\textrm{X}^2$-test were used. The results showed that the place for home-office should be located independently inside house. The desirable size for the home-office might be 3-4 pyung. If the place for home-office share with other places, livingroom of bedroom, it is necessary to develop furniture and partition matching with residential furniture and atmosphere. Office workers prefer U-shaped workstation and coner-shaped workstation.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.2 no.3
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• pp.155-165
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• 1990

The purpose of this research is to study the characteristics of heat exchanger using heat pipe under various working conditions by a finite element analysis and experiment. The results are as follows. 1) In this study, h = $Max^B$ is used for the convective heat transfer coefficient and A = 2.761 and B = 0.701 $Mmax^{(-0.0626)}$ were obtained as the results of experiment. 2) For several different working conditions, (Q/Qb) is predicted by varying the values of L/Lt and Re/Rc. The maximum value of (Q/Qb) is achieved when Re/Rc = 1 and Le/Lc = 0.5. 3) The comparison between calculated value and experimental data showed agreement within 5% error. Therefore the method may be used to predict the performance of heat exchanger using heat pipe for similar geometric conditions. 4) For Re/Re/Rc of 0.2-0.3, the minimum thermal resistance exists when Le/Lt is 0.4-0.65.

• Journal of the Korean Society of Safety
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• v.15 no.1
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• pp.112-120
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• 2000

We have compared the regulations of hot environment workpaces between Korea and ACGIH, then pointed out some insufficiences of Korean regulations for occupational hygiene and safety. And investigated the heat stress characteristics of laboratory, lathe and foundry working. The metabolic heat loads of those workplaces were obtained as 120, 300 및 660 kcal/hr based on WBGT index. WBGT index could be depended on weather condition, therefore useful for controlling working and rest times etc, but Belding-hatch index was represented by strength of working, definitely this would be convinient result for arranging countermeasures of workers in hot environments by estimating metabolic heat and signs of fatigue.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2000.11a
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• pp.43-49
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• 2000

Heat transfer characteristics of self oscillating heat pipe were experimentally investigated for the effect of fill charge ratios and heat loads. The heat pipe used for this study is made of copper capillary, has 0.002m internal diameter, a 0.34m length in one turn and consists of 19 turns. Heating and cooling section each have a length of 70mm. Water was used as working fluid inside heat pipe. As the experimental results, the self oscillating heat pipe was operated by self-exited oscillation and circulation of working fluid and the oscillation within the self oscillating heat pipe assumed chaotic behavior.