• Proceedings of the Korean Institute of Interior Design Conference
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• 2006.11a
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• pp.170-173
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• 2006

Escalating rate of working women is increasing the necessity for day-care centers. Moreover, insufficient child-care system is known as one of many factors that relate to the seriously low birth-rate of our society. Therefore providing more adequate day-care centers can not be regarded as a mere personal necessity but a social need to be considered at corporate and governmental level. The current study analyzes 'Reggio-emilia teaching method' which is a type of early childhood educational program and its relationship to the built environment. It also examines current interior spaces of Reggio-emilia day-care centers and suggests designs for an day-care center appropriate for educating children in Korea.

• Journal of the Korean housing association
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• v.12 no.1
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• pp.11-19
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• 2001

The purpose of this study is to provide basic information for planning family day care. The purpose was accomplished by observations, interviews and survey. The total 29 family day care centers were selected for the observations. The interviews and survey were conducted with 44 caregivers working there. Data were analyzed by descriptive statistics, analysis of variance and multiple regressions. According to the findings of the study, most family day care centers in apartment unit were to keep the laws related to the locations, number of children, etc. Also, the caregivers were satisfied with the general physical conditions of the centers, while they tended to be less satisfied with the space for themselves. Finally this study suggested several design alternativesas useful guidelines for the apartment family day care center.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.23 no.5
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• pp.397-402
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• 2010

In this paper, we studied WVTR(water vapor transmission rate) properties of $Si_3N_4$ thin film that was deposited using TCP-CVD (transformer coupled plasma chemical vapor deposition) method for the possibility of OLED(organic light emitting diode) encapsulation. Considering the conventional OLED processing temperature limit of below $80^{\circ}C$, the $Si_3N_4$ thin films were deposited at room temperature. The $Si_3N_4$ thin films were prepared with the process conditions: $SiH_4$ and $N_2$, as reactive gases; working pressure below 15 mTorr; RF power for TCP below 500 W. Through MOCON test for WVTR, we analyzed water vapor permeation per day. We obtained that WVTR property below 6~0.05 gm/$m^2$/day at process conditions. The best preparation condition for $Si_3N_4$ thin film to get the best WVTR property of 0.05 gm/$m^2$/day were $SiH_4:N_2$ gas flow rate of 10:200 sccm, working pressure of 10 mTorr, working distance of 70 mm, TCP power of 500 W and film thickness of 200 nm. respectively. The proposed results indicates that the $Si_3N_4$ thin film could replace metal or glass as encapsulation for flexible OLED.

• Journal of Advanced Navigation Technology
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• v.23 no.6
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• pp.501-506
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• 2019

This paper presents a prescriptive alternative for establishing a FRMS suitable for us based on scientific data ahead of the introduction and implementation of the FRMS for air traffic controllers in order to meet the International Civil Aviation Organization (ICAO) international standards. I would like to present. Therefore, we confirmed the operation of each air traffic control agency against the current domestic operating standards, and compared and reviewed the operation methods and standards of air traffic control agencies in each country. The controller in Korea defines 10 hours of working hours per day, 8 hours of minimum breaks, and 40 hours per week. Currently, in the case of air traffic control agencies, the daytime and the appropriate working hours are used in the daytime, but in the nighttime, the average time exceeds 5.9 hours. In the case of 40 hours a week, they work an average of 15.7 hours overtime. By adjusting the nighttime work time, this work can be solved by diversifying the form of the worker's input method according to the personal schedule rather than the two-day (day / night) method, as well as the appropriate nighttime time distribution by supplementing the personnel.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.301-304
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• 2001

The purpose of this study is presume that reasonable construction period of constract and appropriate number of persons for works according to reconstruction. This study is presume reasonable construction period of constract and appropriate number of person of reconsruction with a case study out of apartment R.C construction. The result of this study are as follows: 1. In case of four building of apartment Resonable constrution period: 750days$\sim$800days, the average(1day) number of persons under working: 63.5 persons. 2. In case of four building of apartment Resonable constrution period: 850days$\sim$900days, the average(1day) number of persons under working: 100.6 persons. 3. In case of four building of apartment Resonable constrution period: 1000days$\sim$1050days, the average(1day) number of persons under working: 145.0 persons.

• Journal of Korean Biological Nursing Science
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• v.19 no.3
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• pp.206-213
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• 2017

Purpose: The purpose of the study was to compare salivary cortisol levels, self-reported occupational stress, and anxiety before duty to those after duty in the shift and regular work nurses, and the relationships among them. Methods: Thirty nurses working in a tertiary hospital participated in the study. Salivary specimens were collected before and after daytime duty for 2 days. The occupational stress and state anxiety were also evaluated using self-report questionnaires. Results: The average level of salivary cortisol was $0.40{\mu}g/dL$ before duty and $0.20{\mu}g/dL$ after duty in Korean nurses. Overall levels of salivary cortisol, self-reported occupational stress, and anxiety were higher in shift working nurses than regular working nurses. In shift working nurses, the salivary cortisol gap between before and after duty was attenuated on the first day of daytime duty. Significant positive correlation was found between the level of cortisol before duty and anxiety after duty. Conclusion: Strategies to alleviate occupational stress and anxiety are needed for shift working nurses, especially for those with elevated levels of cortisol. It seems to require 3days to recover from attenuated cortisol rhythm during nighttime duty in shift working nurses.

• The Korean Journal of Health Service Management
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• v.9 no.1
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• pp.41-55
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• 2015

Working the night-shift and long working hours may be linked to insomnia. The purpose of this study is to determine the association between night-shift work and long working-hours with regard to subjective insomnia in Korean workers. This study was based on the Third Korean Working Condition Survey (KWCS) conducted on workers in 2011. The total number of individuals included in the analysis was 34,708 workers. Adjusted odd ratios showed statistically effective associations to insomnia. For night-shift work, the results were 2.71 (1.53 - 4.82) for night shift work by experts and managers, 2.95 (2.11 - 4.11) for night-shift work by officers, and 3.90 (2.05 - 7.42) for night-shift work by engineers compared with day duty. For long working hours, the scores were 2.43 (1.68-3.51) for >52 working hours by officers, 1.72 (1.15 - 2.58) for those in sales and service compared to ${\leq}40$ working hours. We suggest the need for Korean workers to target specific groups when creating policies related to reasonable environmental conditions.

• Journal of Technologic Dentistry
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• v.15 no.1
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• pp.27-41
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• 1993

Degree of noise by personal dental laboratory working process and degree of noise by complex dental laboratory working process were measured separtely. The time of exposure to noise greater than 70dB was analyzed. Then, the whole degree of noise in dental laboratory was estimated on the basis of afore-mentioned information. Questionaire were employed to investigate the mental, emotional and physiological effects of noise in dental technicians, The purpose of this study was to provide basic information on keeping dental techneicans who are exposed to noise pollution in good working condition and good health. Results obtained are as follows ; 1. Polishing process in each working part showed high degree of noise greater than 70dB in terms of degree of noise by personal working. 2. Degree of noise by complex working process in each working part was greater than that of personal working process. 3. Time of exposure to noise complex working process the part of porcelain 150min, partial denture 120 min, crown and bridge 100 min, full denture 80 min. 4. Degree of noise by time in dental laboratory was 80dB in general for polishing process and below 75dB for waxing process. 5. Effects of noise on mental and emotional state of dental technicians showed that they felt irritated every day(14%), irritated once in a while(29%) and easily ger mad(19%). 6. Effects of noise on heart and stomach were hyper-gastric acid(38%), gastric ulcer(11%), gastritis(5%), deuodenal ulcer(3%) and weak heart function(32%). 7. Effects of noise in the hearing ability were weak(39%), moderate(33%) and normal(14%) Data presented in this study demonstrated that noise in the dental laboratory exerts profound effect on dental technicians mentally, physiologically and emotionally, in light of the above results, therefore, it appears advisable to devots substantial on the management of working condition and put further(continuing) efforts in the investigation for reducing noise problem.

• KDI Journal of Economic Policy
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• v.31 no.2
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• pp.127-153
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• 2009

There is a growing concern about potential harmful effect of second-hand or environmental tobacco smoking. As a result, smoking bans in workplace become more prevalent worldwide. In Korea, workplace smoking ban policy become more restrictive in 2003 when National health enhancing law was amended. The new law requires all office buildings larger than 3,000 square meters (multi-purpose buildings larger than 2,000 square meters) should be smoke free. Therefore, a lot of indoor office became non smoking area. Previous studies in other counties often found contradicting answers for the effects of workplace smoking ban on smoking behavior. In addition, there was no study in Korea yet that examines the causal impacts of smoking ban on smoking behavior. The situation in Korea might be different from other countries. Using 2001 and 2005 Korea National Health and Nutrition surveys which are representative for population in Korea we try to examine the impacts of law change on current smoker and cigarettes smoked per day. The amended law impacted the whole country at the same time and there was a declining trend in smoking rate even before the legislation update. So, the challenge here is to tease out the true impact only. We compare indoor working occupations which are constrained by the law change with outdoor working occupations which are less impacted. Since the data has been collected before (2001) and after (2005) the law change for treated (indoor working occupations) and control (outdoor working occupations) groups we will use difference in difference method. We restrict our sample to working age (between 20 and 65) since these are the relevant population by the workplace smoking ban policy. We also restrict the sample to indoor occupations (executive or administrative and administrative support) and outdoor occupations (sales and low skilled worker) after dropping unemployed and someone working for military since it is not clear whether these occupations are treated group or control group. This classification was supported when we examined the answers for workplace smoking ban policy existing only in 2005 survey. Sixty eight percent of indoor occupations reported having an office smoking ban policy compared to forty percent of outdoor occupation answering workplace smoking ban policy. The estimated impacts on current smoker are 4.1 percentage point decline and cigarettes per day show statistically significant decline of 2.5 cigarettes per day. Taking into account consumption of average sixteen cigarettes per day among smokers it is sixteen percent decline in smoking rate which is substantial. We tested robustness using the same sample across two surveys and also using tobit model. Our results are robust against both concerns. It is possible that our measure of treated and control group have measurement error which will lead to attenuation bias. However, we are finding statistically significant impacts which might be a lower bound of the true estimates. The magnitude of our finding is not much different from previous finding of significant impacts. For cigarettes per day previous estimates varied from 1.37 to 3.9 and for current smoker it showed between 1%p and 7.8%p.

• Journal of Korean Public Health Nursing
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• v.37 no.1
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• pp.43-53
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• 2023

Purpose: This study aims to identify the factors influencing the depression of teachers in child day care centers. Methods: The study 181 teachers working at national/public or child day care centers certified by Seoul Metropolitan government in Seoul, South Korea. Data from September to October 2021, and emotional labor, job stress, ego resilience, stress resilience, and depression. Data were analyzed using t-test, ANOVA, Pearson's correlation coefficients, and stepwise multiple regression. Results: The average depression of child day care center's teachers 8.52±7.58 out of 60 points, and the depression group (above 21 points) was 9.4%. Depression in child day care center's teachers was positively correlated with job stress (r=.42, p<.001) and negatively correlated with ego resilience and stress resilience (r=-.55, p<.001). Factors affecting depression of child day care center's teachers were found to be job stress (p=0.005), ego resilience (p<.001), stress resilience (p=0.031) and the explanatory power of these variables was 39%. Conclusion: Results of this study indicate that in the future development of depression intervention programs for teachers of child day care centers, it is necessary to include measures that reduce job stress and strengthen ego resilience and stress resilience.