• Proceedings of the Korean Institute of Surface Engineering Conference
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• 1999.10a
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• pp.60-61
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• 1999

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.11
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• pp.1771-1776
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• 2013

In order to understand how static stretch and PNF stretch affect flexibility improvement of college taekwondo players, the study evaluated the joint working range of the knee joint while testing the jump performance to see if those stretches have any influence on a functional performance. According to the results of the research, each group of the static stretch and PNF stretch was observed with significant improvements in the joint working range and the jump performance. From the comparison between the two groups, only the jump performance came up with significant differences.

• Journal of Korean Clinical Nursing Research
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• v.16 no.1
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• pp.17-26
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• 2010

Purpose: The purpose of study was to assess the health promoting lifestyle among hospital nurses and to investigate the relationships between the health promoting lifestyle, resourcefulness, and perceived health status. Methods: The subjects were 400 nurses working at three university hospitals. The data were collected by self-administered questionnaires from September 1st to September 30th, 2008. Results: The range of Health Promoting Lifestyle Profile (HPLP) was 71-185, the average score was 112.50, and the item mean was 2.16 (total 4). The range of resourcefulness was 9-50, and the average score was 16.56. The range of perceived health status was 4-13, and the averae score was 9.52. Health promoting lifestyle was showed significantly positive correlations with resourcefulness (r=.473, p<.001), and with perceived health status (r=.176, p<.001). The independent variables including resourcefulness, religion, working shift, sleeping hours, and exercise explained 58.6% of the variance of health promoting lifestyle. Especially, resourcefulness explained 53.2% of the variance of health promoting lifestyle. Conclusion: Resourcefulness was identified as the most important variable contributing to the performance of health promoting lifestyle.

• Journal of environmental and Sanitary engineering
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• v.17 no.2
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• pp.85-91
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• 2002

Workers who work at indoor and outdoor environment near busy road are suspected to be exposed to high-elevated air pollutant levels during working hours. This study evaluated the working-time nitrogen dioxide ($NO_2$) exposure for workers (repairmen and polishers) of shoe-stalls. Since shoe-stalls have particularly been located near busy road in Korea, workers might be high exposure to $NO_2$ from traffic exhaust as well as indoor sources of shoe-stall such as portable gas range (butane gas) during working hours. In this study, we measured the indoor and outdoor $NO_2$ concentrations of shoe-stalls. Simultaneously, outdoor $NO_2$ concentrations of building through sidewalk from shoe-stall were measured. High $NO_2$ exposure for workers of shoe-stalls was considered to be inflow of outdoor source of exhausted emission from vehicles and indoor source from usage of gas range to polish the shoe. Indoor/outdoor $NO_2$ concentration ratio ($0.94{\pm}0.22$) in Seoul was higher than that ($1.06{\pm}0.34$) in Asan, because ambient $NO_2$ level was high in Seoul and usage of gas range was prevalent in Asan. According to $NO_2$ concentrations by distance from roadside to building through sidewalk, $NO_2$ concentrations showed the decreased trend with distance. The results of this study can be utilized by municipal authorities in urban planning for evaluating effects of future traffic planning and land use.

• 한국가스학회:학술대회논문집
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• 1998.09a
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• pp.249-254
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• 1998

This paper describes the study of developing air-cooled absorption system which uses a new working solution instead of LiBr solution to improve the performance of system. The absorption chiller-heater considered was an air-cooled, double-effect, $H_2O/LiBr+HO(CH_2)_3$ system of parallel flow type. In this study, we found out the characteristic of new working solution through the cycle simulation and compared the result that of LiBr solution to evaluate. The new working fluid has a wider working range with $8\%$ higher crystallization limit at the saturated refrigerant pressure of 0.8kPa. The optimum designs and operating conditions of air-cooled absorption system were suggested based on this cycle simulation analysis. It was demonstrated that new working fluid substantially improves the performance of the absorption refrigeration machine and is expected to increase the COP by as much as $5\%$.

• Journal of Ocean Engineering and Technology
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• v.20 no.1 s.68
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• pp.1-6
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• 2006

The effects of microstructure on the damping capacity and tensile properties of 316L stainless steel were investigated. Increasing the degree of cold working, the volume fraction of $\varepsilon-martensite$ decreased after rising to maximum value at specific level of cold working, the volume fraction of d-martensite slowly increased and then dramatically increased from the point of decreasing $\varepsilon-martensite$ volume fraction. Increasing the degree of cold working, the behnvior of damping capacity is similar to that of the $\varepsilon-martensite$. After the damping capacity showing the maximum value at about $20\%$ of cold rolling, damping capacity was decreased with the volume fraction of $\varepsilon-martensite$. Tensile strength was proportional to the volume fraction of d-martensite, and elongation steeply decreased in the range low volume fraction of a'-martensite, then slowly decreased in range the above $10\%$ volume fraction of d-martensite. The damping capacity and elongation is strongly controlled by the volume fraction of $\varepsilon$ martensite with liner relationship. However, the effect of the volume fraction of d-martensite and austenite phase on the damping capacity was not observed. Tensile strength was governed by the volume fraction of d-martensite.

• Fashion & Textile Research Journal
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• v.8 no.2
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• pp.203-208
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• 2006

The purpose of this study is to examine the ergonomic working uniform. Developing a prototype uniform will be the first stage in aiming to create a working uniform in the construction field. This study was conducted using a questionnaire in the construction field of Daegu city, and the data was gathered from 121 questionnaires. Some of the questions that were asked, were about the case of putting on and removing the uniform and if any areas of uniform caused discomfort. The areas of the uniform that caused problems were the waist, knee, shoulder, arm and neck regions. The free range of movement of these regions were restricted and caused the person to feel cramped. The results of the questionnaire called for improvements to the knee, waist, shoulder and crotch area. The prototype that was developed offered more range of movement in the knee and crotch area, while not causing the uniform to be cramped too much during motion. The prototype also improved comfort by raising the waist line of back part, and by having the ability of the uniform to be tightened or loosened with zipper according to the persons preference. The upper area of the uniform was improved by dropping the shoulder seam line which enhanced comfort and also allowed a better fit for the elbow and wrist. The prototypes additional feature included a slit zipper in the sides of the trousers and a gusset in the under arm area to improve breathability and sweat elimination.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.14 no.6
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• pp.49-56
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• 2015

For designing working devices of construction equipment, it is necessary to consider not only sufficient working ability but also available working range. Therefore, it is important to select the appropriate pivot positions of links. This paper presents a study on selection of pivot points of links used in construction equipment. To analyze the effect of each pivot point, a design program for pivot selection is developed. A conventional pivot design method requires a complicated process because it needs to create a certain working position manually to evaluate its performance. However, the developed program includes an automatic link assembly algorithm; thus, the working device can easily be analyzed by using pivot information of links. The developed program also included a kinematic/static analysis module and characteristic analysis algorithms. Therefore, it is possible to easily analyze a working device model created through the automatic assembly algorithm, whereby users can easily analyze the effect of each link pivot point for the actual product design.

• The Journal of the Korea Contents Association
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• v.22 no.9
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• pp.485-496
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• 2022

The study aims to determine the factors associated with married working women's health-related quality of life (HRQOL) in terms of general, marital, work, and health characteristics. In view of this, data was gathered from a total of 2,060 married working women who participated in the 7th wave (2017-2018) of the Korean Longitudinal Survey of Women and Family (KLoWF), which was conducted by the Korean Women's Development Institute. The data was analyzed using SPSS 25.0. As a result of inputting the general characteristics, marital characteristics, working characteristics, and health characteristics of married women, family's economic status, diagnosed disease, perceived stress were found to have a significant effect on married working women's HRQOL. Based on the study results, educational programs and various policies to help married working women better manage their family-work conflict were proposed as a means to improve their HRQOL. This study is significant as it identified a wide range of factors that affect married working women's HRQOL and discussed health and welfare measures to improve it.

• Korean Journal of Clinical Laboratory Science
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• v.37 no.1
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• pp.1-7
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• 2005

The purpose of this study was to verify (i) a consistent calibration verification for the assessment of method linearity and (ii) calibration agreement with calibration settings. We validated calibration verification through method linearity with different lot number of individual calibrators that span the working range for 9 tests except salicylate with control sample in test. We evaluated that it covered broad analyte range to assay from near zero to the top of the measuring range with 5 or 6 points every three times for 10 analytes in TDM test. Target values were plotted on X-axis with assigned or observed values on the Y-axis. Working range were as follows. Calibration verification of the measuring range (maximum to minimum values) has been validated asetaminophen 0.1 to $304.6_{\mu}g/mL$, salicylate 0 to $1005_{\mu}g/mL$, valproic acid 3.2 to $154.19_{\mu}g/mL$, digoxin 0.17 to 5.65 ng/mL, vancomycine 1.3 to $80.51_{\mu}g/mL$, carbarmazepine 0.1 to $22.3_{\mu}g/mL$, phenytonin 0.6 to $40.21_{\mu}g/mL$, theophyline 0.2 to $40.21_{\mu}g/mL$, primidone 0 to $24.07_{\mu}g/mL$, phenobarbital 0.6 to $60.0_{\mu}g/mL$. Drawing a straight line through five or six points of these data showed good linearity. We are sure that it is important to assess the calibration verification of a test method to ascertain the lowest and highest test results that are reliable.