• Sleep Medicine and Psychophysiology
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• v.28 no.1
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• pp.34-42
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• 2021

Objectives: This study investigated sleep quality in female full-time homemakers and evaluated the relationship of sleep disturbance with psychological and socio-environmental factors. Methods: This cross-sectional study adopted a structured survey and sequential recruitment method for randomized participation of community-dwelling full-time female homemakers. Sleep quality and mental health were measured using the Korean version of the Pittsburgh Sleep Quality Index (K-PSQI), Korean version of the Beck Depression Inventory-II (K-BDI-II), Korean version of the Beck Anxiety Inventory (K-BAI), and Korean version of the Beck Hopelessness Scale (K-BHS). The willingness-to-pay (WTP) method was selected to measure the self-evaluated monetary value of household service work. The relationship among the main relevant factors was statistically analyzed through a mediation model. Results: A total of 166 participants were analyzed and classified having poor versus good sleep quality (poor : 24.1%, n = 40 ; good : 75.9%, n = 126 ; cut-off point = 9 on the K-PSQI). Significant between-group differences were observed in mental health status (K-BDI-II, p < 0.001 ; K-BAI, p < 0.001 ; K-BHS, p = 0.003). The moderated mediation model was verified, indicating that depression may mediate the association between nurturing burden and sleep disturbance. The path from nurturing burden to depression may be moderated by average monthly household income. Conclusion: A relatively high portion of full-time female homemakers may suffer from sleep disturbance and interactions between psychological and socio-environmental factors might determine sleep quality, suggesting the need for public health policies targeting improvement of sleep quality and mental health among full-time homemakers.

• Journal of Oriental Neuropsychiatry
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• v.26 no.3
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• pp.211-224
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• 2015

Objectives: This study aimed to investigate gender differences in the Korean Medical Community. Methods: Participants in the research study included 90 students regularly attending the fourth grade in Korean Medicine College, of which 48 were male and 42 were female. Results: 1. Patient's preferences for female KMD (Korean Medicine Doctor) had the lowest response rate in Korean Medical Society. Preferences for male KMD were due to factors including comfort level, rationality, good training, and patient's preference. 2. Patient's preferences for female KMD had the highest response rate in Gynecology, and Pediatrics. On the other hand, patient's preferences for female KMD had the lowest response rate in the other 7 specialty subjects. 3. The reasons for gender discrimination against male KMD were lack of subtlety, lack of empathy, authoritative attitude, and lack of patient management skills. The reasons for gender discrimination, against female KMD were childcare burden, social prejudices, lack of physical strength, and housekeeping burdens. Conclusions: The study results indicated that there was a lower preference for female KMD than male KMD among the Korean Medical Society and in patients' consciousness. Male-centered culture of Korean Medical Society had no role in this finding, but masculine image for KMD jobs and work-family double burden for female KMD were important contributing factors.

• Journal of the Korean Professional Engineers Association
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• v.14 no.3
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• pp.9-21
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• 1981

The rationalization for Tunnel Drifting is based on the high productivity which is achievable due to Continuous work with a Jumbo Drill, resulting in a much higher efficiency them the Conventional method of blasting, mucking and supporting services. Large projects of over 4,000m Tunnel Drifting are condidated to justify the use of a Jumbo Drill with a combination of superior explosives, machinery and techniques. During a Tunnel Drifting test, Gulita, Nabit and slurry made by Nitro Nobel were employed with following results. 1, Conditions: a. Granite Rock with Two free face b. Burden (W), 2m c. Diameter of hole, 42mm d. Depth of hole 3.5m e. Hole pitch 0.6m f. Charged Explosive per hole Gelatin Dynamite 4 pieces (112.5${\times}$4ea)+Guuita 5 pieces(110g${\times}$5ea) g. Simal-taneous Detonation h. After the blasting resultant rock size was Less 40% of the 0.3m Lumps. 2. Calculation results W=q/Wn=100cm‥‥‥Burden in simultaneous blasting 0.865kg(7.7ea)/hole ‥‥‥Amount of charge but hole pitch is 1.5W-2W The estimated cost of using a Jumbo Drill for the Construction of a 3,000,000 bbL sub-surface oil storage would be as follows: This calculation is based on the Jumbo Drill advancing 3.6m per blasting cycle. Unit cost/bbL Excavation $3.13 The attached sheet shows ideal Drilling pattern with Burn Cut & Smooth blasting method. In conclusion, it is my opinion that this method will assure safety and save cost and improve our technical know-how.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.27 no.4
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• pp.371-379
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• 2017

Objectives: The purpose of this study is to investigate the differences and the influencing factors of health habits such as smoking, drinking, and exercise on job stress among IT workers. Methods: A questionnaire was distributed to total of 300 people (30 persons per business place) at 10 IT work sites performing computer and information system tasks, and 275 data points were analyzed. The survey items were general characteristics, occupational characteristics, employment type, physical burden, amount of drinking, smoking, exercise, and job stress. Results: The results of this study are summarized as follows. First, non-regular workers showed higher smoking, exercise, and job stress than did regular workers by employment type, but exercise was not significant. Regular workers had a higher rate of drinking than non-regular workers. Second, the factors affecting alcohol drinking were gender and age, and factors affecting smoking were gender and employment type. Third, factors affecting job stress were annual income, long working hours, physical burden, and employment type. Conclusions: It is necessary to consider employment patterns in smoking, drinking, and job stress management. In addition, it is necessary to deeply analyze what affects the health behaviors and job stress of IT workers and explore ways to mitigate them.

• Journal of Communications and Networks
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• v.9 no.4
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• pp.419-427
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• 2007

In wavelength-division-multiplexing(WDM) networks a link failure may cause the failure of several high-bit-rate optical channels, thereby leading to large data loss. Recently, various protection and restoration mechanisms have been proposed to efficiently deal with this problem in mesh networks. Among them, dedicated path protection(DPP) is a promising candidate because of its ultra-fast restoration time and robustness. In this work we investigate the issue of planning and optimization of WDM networks with DPP. Integer linear programming(ILP), in particular, is one of the most common exact method to solve the design optimization problem for protected WDM networks. Traditional ILP formalizations to solve this problem rely on the classical flow or route formulation approaches, but both these approaches suffer from a excessively high computational burden. In this paper, we present a variable-aggregation method that has the ability of significantly reducing the complexity of the traditional flow formulation. We compare also the computational burden of flow formulation with variable aggregation both with the classical flow and route formulations. The comparison is carried out by applying the three alternative methods to the optimization of two case-study networks.

• Journal of the Korea Convergence Society
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• v.12 no.3
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• pp.305-315
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• 2021

The purpose of this study was to explore what program worker' experiences in suicide prevention gatekeeper program using tong/ri Chiefs. Participants were three workers who have been in charge of this program for more than 2 years. A qualitative research method, narrative study, was used. As a result of the study, they started the program with burden and fear. They felt a heavy burden of the internal and external the organization and lack of themselves. However, they were able to continue their work despite these difficulties because of the support of their families, colleagues and tong/ri Chiefs. And, they suggested ways to revitalize suicide prevention gatekeeper program using tong/ri Chiefs.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.439-441
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• 2021

The number of bedsores patients is increasing every year due to the aging society, and the importance of bedsores management is emerging as a burden on nurses due to the pandemic situation of COVID-19. Curses are a disease that causes ulcers due to floating posture, and it is a disease that is burdensome for nurses to periodically change their body position. Therefore, this study proposes a system that can reduce the burden on nurses by detecting the risk of inducing bedsores and monitoring the status of calls in real time. Through this system, it will be possible to increase nursing work by solving the difficulties of nursing in the bedsores of nurses.

• Journal of Korean society of Dental Hygiene
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• v.16 no.3
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• pp.435-446
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• 2016

Objectives: The purpose of the this study is to investigate parenting stress of married dental hygienists having preschool and school aged children. Methods: A self-reported questionnaire was completed by 242 married dental hygienists from September to December, 2015 via e-mail and ordinary mail. The questionnaire consisted of demographics, job-related characteristics, family life satisfaction, and parenting stress. The data were analyzed using Stata 13.0 program. Results: As for job-related characteristics, 36.6% of the subjects answered 'not possible' in work hour flexibility. The reasons why family-work balance is difficult were 'parenting and education(58.7%)' and 'burden of family-work balance(32.4%)'. Family life satisfaction was 3.03, and parenting stress was 2.41. Parenting stress gets higher if their children are younger, monthly income is lower, and mother/father's age are lower. And parenting stress becomes higher if their career as dental hygienists is less, they are contract worker, and frequency to change jobs is higher. Concerning the reason why work-family balance is difficult, parenting stress is found to be high when they choose 'parenting and education', 'burdens of work-family balance', and 'relationship in workplace'. Family life satisfaction reduced parenting stress. According to the results of multiple linear regression analysis, frequency to change job influences parenting stress. Conclusions: Parenting stress increases turnover and career interruption of married dental hygienists. It is hard to improve work environment without policy support. It will be necessary to establish policy for employed mothers and create a work atmosphere where the policy can be utilized without difficulty.

• Journal of dental hygiene science
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• v.20 no.3
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• pp.163-170
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• 2020

Background: Job satisfaction of dental hygienists has been discussed continuously in dental hygiene research. It has been the most representative performance variable in dental and human resource management. However, in quantitative research, most of the studies have analyzed the causal relationship with variables related to dental hygienists' job satisfaction. The existing qualitative research contains only the studies that targeted dental hygienists with an experience of more than 10 years. The present study aimed to understand and to characterize the job satisfaction of dental hygienists with an experience of 2 to 10 years and to compare it with the qualitative research on dental hygienists with an experience of 10 or more years. Methods: An in-depth interview of dental hygienists with 2 to 10 years of experience working in 10 dental clinics was conducted. For data analysis, Giorgi's analysis method was used. Results: After analyzing the meaning of job satisfaction of dental hygienists, 180 semantic words and 19 subcategories were derived. The results of the interview were categorized into for central meanings: recognition and rewards, work experience and ability improvement, occupational characteristics, and work characteristics. Recognition and rewards included workplace recognition, patient recognition, self-effort and recognition, and the feeling of being rewarded. Work experience and ability improvement included various work experiences and factors relates to improving the work ability. Occupational characteristics included professional job, interest and persistence, job extensibility, and no burden of employment. Work characteristics included working conditions and separation of work and private life. Conclusion: The development of tools to measure the level of dental hygienists' job satisfaction after long-term service and to conduct follow-up research regarding ways and effects to improve job satisfaction is needed.

• Journal of the Korea Convergence Society
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• v.8 no.10
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• pp.305-310
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• 2017

The purpose of the study is to test structural relationship of subjective health, ability to work, participation on economic activity, and life satisfaction among the elderly. Recently, societies have tried to lessen a social burden and alleviate negative perceptions of the elderly through some perspectives such as productive aging and active aging. In these perspectives pay attention to health and social participation to improve quality of life. Subjects were 3,392 elderly people over the age of 65 from 10th Korea Welfare Panel Study. The main results of the study are as follows. First, subjective health, ability to work, and participation on economic activity had a direct effect on life satisfaction among the elderly. Second, subjective health had a statistically significant effect on ability to work and participation on economic activity. Finally, avility to work had a positive effect on participation on economic activity. Based on the results of the analysis, this study suggested that health and work related factors should be considered as the important factors to improve the life satisfaction among the elderly.