• Korean Journal of Adult Nursing
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• v.28 no.5
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• pp.514-524
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• 2016

Purpose: The purpose of this study was to describe the reported experiences of health management among twenty elderly workers living in urban areas. Methods: Corbin and Strauss's grounded theory approach was used to capture the meaning of health management. Theoretical sampling technique was used in the interviews. Using open coding, axial coding, and selective coding, data were collected and analyzed simultaneously. Results: The core category was 'pursuing health to take root in the workplace.' Four stages of the elderly workers' health management were identified as 'awareness of health changes', 'having the will to be healthy', 'utilization of health care resources', and 'reorganization of health habits.' However, when the elderly workers reported limited capacity to manage their health, then two new categories were described: 'awareness of health changes' and 'settlement with current health.' Conclusion: To the elderly workers the concept of working was equated with being healthy. Further, the participants reported having a future oriented view of health and sought health to extend their working lives. The specialized intervention of health management targeting elderly workers in the settlement stage of current health habits should be provided.

• Progress in Superconductivity and Cryogenics
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• v.5 no.1
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• pp.76-80
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• 2003

A contractible heat pipe is designed and tested to improve cooling performance of conduction cooled superconducting magnet. When the heat pipe temperature drops below the triple point temperature, heat pipe working fluid freezes to create low pressure. From this moment the heat pipe does net work any more (OFF state) and it just works as a heat leak path when the temperature of the first stage is higher than that of the second stage. Considering small cooling capacity of the second stage around 4.2 K, the conduction loss is not negligible. Therefore, the contractible heat pipe, made of a metal bellows and copper tubes, was considered to eliminate the conduction loss. Nitrogen and argon are as working fluid of heat pipe. The copper block is cooled down with these heat pipe and the cooling performance for each heat pipe is compared. At off state, the bellows is contracted due to the low pressure of heat pipe and the evaporator section of the heat pipe is detached about 3 mm from the second stage cold head of the cryocooler. In this way, we tan eliminate the conduction loss through the heat pipe wall.

• Journal of Preventive Medicine and Public Health
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• v.27 no.4 s.48
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• pp.777-791
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• 1994

For developing the Group Health Care System, health managers' job structure were analysed in the aspects of content, amount, and process. As a trial research, data were collected by a standardized job analysis table to 6 doctors, 40 nurses, and 11 industrial hygienists of Group Health Care System. Health care managers were performing complex and intellectual jobs such as healh education for workers, managing health care, conference as well as more simple jobs like as filling diary. Especially, job was consisted of general job and health care management job in the proportion of 1:2.18. The major general job were data management related with the health statistics, and major health care management jobs were managing health care, health counselling, environmental management of working sites. Each specific jobs were required differentiated intellectual capacity, creativity, autonomy, psychic stress, and physical work; most respondents perceived that health care management jobs should require more inputs than general jobs. Additionally job satisfaction and perceived need on specific Job items were anzlysed. Results of this research, suggested through the field experiences in working sites, should be considered for improving the Group Health Care System.

• Transactions of the Korean Society of Automotive Engineers
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• v.20 no.4
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• pp.76-81
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• 2012

In recent, there are tremendous efforts to apply co-generation concept in automobile to improve its thermal efficiency. The co-generation is basically a simple Rankine Cycle that uses the waste heat from the engine exhaust and coolant for heat source. In spite of developed nano technology and advance material science, the bulky co-generation system is still a big concern in automotive application. Therefore, the system should be effectively designed not to add much weight on the vehicle, but the capacity of the waste heat recovery should be still large. With such a goal in mind, the system thermal efficiency was investigated in terms of the system operation condition and working fluid. This paper provides a direction for the optimal design of the automotive co-generation system.

• International Journal of High-Rise Buildings
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• v.7 no.3
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• pp.223-232
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• 2018

Two novel types of construction detailings, including using the distributive beam and the inner ring diaphragm in the joint between large-section CFT columns and outrigger truss to enhance the transferring efficiency of huge vertical load, and using the T-shaped stiffeners in the steel tube of large-section CFT columns to promote the local buckling capacity of steel tubes, were tested to investigate their working mechanism and design methods. Experimental results show that the co-working performance between steel tube and inner concrete could be significantly improved by setting the distributive beam and the inner ring diaphragm which can transfer the vertical load directly in the large-section CFT columns. Meanwhile, the T-shaped stiffeners are very helpful to improve the local bulking performance of steel tubes in the column components by the composite action of T-shaped stiffeners together with the core concrete under the range of flange of T-shaped stiffeners. These two approaches can result in a lower steel cost in comparison to normal steel reinforced concrete columns. Finally, a practical engineering case was introduced to illustrate the economy benefits achieved by using the two typical detailings.

• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.1503-1506
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• 2009

Bubble jet loop heat pipe is a newly devised variation of heat pipe in which heat is effectively transported by the latent heat of evaporation and condensation as well as the heat capacity of circulating working fluid. The circulatory and oscillating motion of the working fluid becomes possible by the motion of bubble jet which is generated at a narrow circular gap. These bubbles are condensed at the condensing section. Bubble jet loop heat pipe makes it possible to carry heat long distances upward and horizontal directions. Because Its structure is a very simple and a low cost, it is available for the floor heating, vinyl house heating, the defrosting of heat pump system and home refrigerator.

• Journal of Korean Public Health Nursing
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• v.29 no.2
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• pp.190-202
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• 2015

Purpose: This study was designed to determine visiting nurses' job performance and self confidence by career and number of visiting households. Methods: The subjects were 120 visiting nurses fully in charge of the visiting health care program working in 18 community health care centers, who were checked for 5 domains of visiting nurses' job, 39 tasks of job performance and self confidence. ANOVA test, Scheffe test and Pearson correlation coefficient were used for data analysis. Results: The level of job performance and self confidence indicated highest in understanding of the visiting health care program among 5 domains of visiting nurses' job. The level of job performance and self confidence indicated lowest in community resource connection. When nurses were classified by a career with approximately 5 years of working experience, nurses with a career of more than 5 years were highly significant. Job performance and self confidence were positively correlated. Conclusion: Based on the result of this study, it is recommended that the education program for newly hired nurses should be differentiated from that for visiting nurses with a career in order to improve quality of the visiting nursing program and capacity of residents' health care.

• Journal of Korea Water Resources Association
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• v.31 no.2
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• pp.133-144
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• 1998

Recent development booms in urban watersheds have increased impermeable areas and brought about an increase of peak flood. Eventually, some people living in the lower area of an urban watershed, very often and seriously, have suffered form inundation. In this study, for minimization of inundation in urban watersheds, the operational criteria for pump stations are suggested. At first, ILLUDAS has been selected as a runoff model which can explain the past precipitations. Secondly the operational criteria for pump stations could be suggested by working out an operational criteria for pump stations could be suggested by working out an operation program from the relationship between pumping capacity and accumulative hydrographs, and from the Intensity-Duration-Frequency relationship.

• Journal of the Korea institute for structural maintenance and inspection
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• v.7 no.2
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• pp.247-261
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• 2003

The technique of posttensioning has been used successfully to improve the performance of existing concrete structures. However, very few applications of this technique can be found in steel structures. Posttensioning by means of high strength cable or bar can be used to effectively increase the working load capacity of Truss Bridges. The benefits of posttensioning trusses can be achieved in strengthening of existing structures as well as in the design of new structures. In this paper, the elastic behavior of posttensioned trusses with straight and draped tendon profiles is examined. For the analysis of posttensioned trusses in the elastic range of behavior, two methods are presented, namely, the flexibility method and the mixed-method, i.e., a combination of the stiffness and flexibility methods. Using the presented methods, the effects of design variables such as the tendon profile, truss type, prestress force, and tendon eccentricity on the working load and deflection of trusses are studied. The results show that the allowable load of truss increases proportionally with increase in prestress force and eccentricity. Posttesioning enlarges the elastic range, increases redundancy, and reduces deflection and member stresses. Thus, the remaining life of a truss bridge can be increased relatively inexpensively.

• Journal of East-West Nursing Research
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• v.19 no.2
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• pp.114-120
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• 2013

Purpose: The purpose of this study was to investigate the view on old age of nurses working at general hospitals, geriatric hospitals, oriental hospitals and public health centers. Methods: Data were collected using a self-report questionnaire from 461 nurses working at 3 general hospitals, 8 geriatric hospitals, 7 oriental hospitals and 6 public health centers located in Seoul, Gyeonggi-do and Chungcheong-do from June 20 to September 6, 2012. Results: The mean score of the nurses' view about old age was 3.38 out of 5 points. The details show that the 'society character' was the highest at 4.58, followed by the 'capacity character' 3.94, the 'psychology-economical character' 3.02 and the 'physical-cognitive character' 2.71. As for workplace, oriental hospitals had the highest points on the view about old age, while geriatric hospitals had the lowest. Conclusion: The results of this study indicated that the nurses' view about old age were above the moderate level. As for workplace, geriatric hospital nurses had the lowest view about old age. Therefore, it is recommended to develop an educational program that may promote the nurses' view about old age and provide the better elderly care service.