• Journal of Home Health Care Nursing
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• v.25 no.3
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• pp.173-181
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• 2018

Purpose: This study examined the effects of physical fitness and aging anxiety on life satisfaction among the elderly. Methods: The participants were 119 elderly. Data collection was conducted from July 1 to 10, 2018. Data were analyzed using descriptive statistics, t-tests, ANOVA, Pearson's correlation coefficients, and multiple linear regression analysis with SPSS software. Results: The mean life satisfaction score was 4.10. Life satisfaction differed significantly according to several general characteristics: education level (p=.014), income (p<.001), living with partner (p=.041), perceived health status (p<.001), and number of chronic diseases (p<.001). Statistically significant positive relationships were observed between life satisfaction with muscle strength (r=.20) and, flexibility (r=.21), and a negative relationship was observed with aging anxiety (r=-.66). A total of 60.0% of life satisfaction was explained by income, perceived health status, muscle strength, flexibility, and aging anxiety. Conclusion: These results can be used to develop life sports programs to improve physical, social, and emotional health promotion with consideration for support to alleviate economic burden. Effect of life sports are evident as a way for healthy and energetic elderly. It should not be a simple exercise program but an integrated plan for improving physical, mental, and social health of the elderly.

• International Journal of Internet, Broadcasting and Communication
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• v.15 no.2
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• pp.144-156
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• 2023

Smart agriculture is a rapidly growing field that seeks to optimize crop yields and reduce risk through the use of advanced technology. A key challenge in this field is the need to create a comprehensive smart farm system that can effectively monitor and control the growth environment of crops, particularly when cultivating new varieties. This is where fuzzy theory comes in, enabling the collection and analysis of external environmental factors to generate a rule-based system that considers the specific needs of each crop variety. By doing so, the system can easily set the optimal growth environment, reducing trial and error and the user's risk burden. This is in contrast to existing systems where parameters need to be changed for each breed and various factors considered. Additionally, the type of house used affects the environmental control factors for crops, making it necessary to adapt the system accordingly. While developing such a framework requires a significant investment of labour and time, the benefits are numerous and can lead to increased productivity and profitability in the field of smart agriculture. We developed an AI platform for optimal control of facility houses by integrating data from mushroom crops and environmental factors, and analysing the correlation between optimal control conditions and yield. Our experiments demonstrated significant performance improvement compared to the existing system.

• Journal of Engineering Education Research
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• v.25 no.6
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• pp.38-46
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• 2022

In order to improve students' interest, class participation and class comprehension in engineering theory classes, a class applying review games as Jinjinga, Bingo, etc. were designed and developed. Through applying them to three engineering theory subjects, the specific effects of the strategy on students' understanding, interest, participation, and academic achievement were analyzed and the usefulness of each review game strategy was analyzed. Analyzing class data over the past 11 years, there was a clear correlation between performance of the students in the review game and their actual grades, which was found to be greater than the negative effect of absence rate on the test performance or grades. This study also researched students' perceptions compared to other general subjects not applying the review games. The results of a survey of the students who took the review game class showed the usual amount of usual studying hours increased, the burden of examination or the amount of studying hours for preparing the exam was reduced, and the class interest and achievement significantly increased compared to other subjects in the same major.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.10 no.1
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• pp.223-234
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• 2000

Objective - To evaluate the usefulness of chromium in erythrocytes as a biological marker of exposure to hexavalent chromium in chromate producers and chrome platers Methods - Blood and urine samples were ramdomly obtained from chromate producers (n=34) and chrome platers (n=35), and non-exposed workers (n=75), chromium level in erythrocytes and plasma, and urine were measured. Different chromium exposure workers were assessed through measurements of airborne hexavalent chromium concentrations using a personal air sampler. Linear associations between variables were evaluated with correlation analysis. Results - The chromate producers had mean chromium levels in erythrocytes five fold as higher than the chrome platers, and fifteen fold higher than non-exposed group. Among the chromium exposed workers, airborne hexavalent chromium was positively and strongly correlated with in erythrocytes (r=0.689, p<0.01), and erythrocytes chromium was inversely correlated with hematocrit (r=-0.441, p<0.01), hemoglobin (r=-0.465, p<0.01) and the number of red blood cells (r=-0.28, p<0.05). Conclusions - In conclusion, this study suggests that chromium in erythrocytes is a good indicator of the chromium body burden caused by exposure to hexavalent chromium.

• Journal of Advanced Marine Engineering and Technology
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• v.40 no.5
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• pp.437-446
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• 2016

Feature selection has become an essential technique to reduce the dimensionality of data sets. Many features are frequently irrelevant or redundant for the classification tasks. The purpose of feature selection is to select relevant features and remove irrelevant and redundant features. Applications of the feature selection range from text processing, face recognition, bioinformatics, speaker verification, and medical diagnosis to financial domains. In this study, we focus on filter methods based on information entropy : IG (Information Gain), FCBF (Fast Correlation Based Filter), and mRMR (minimum Redundancy Maximum Relevance). FCBF has the advantage of reducing computational burden by eliminating the redundant features that satisfy the condition of approximate Markov blanket. However, FCBF considers only the relevance between the feature and the class in order to select the best features, thus failing to take into consideration the interaction between features. In this paper, we propose an improved FCBF to overcome this shortcoming. We also perform a comparative study to evaluate the performance of the proposed method.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.29 no.2
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• pp.47-54
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• 2021

Recently, the issue of maintaining pilot competency has emerged as one of the major challenges in the aviation industry due to irregular schedules and flight intervals caused by the global COVID-19. Therefore, a survey was conducted on airline pilots to determine how stressed they would be when returning to their flights after experiencing irregular schedules or long-term furloughs. The level of stress that pilots receive due to flight intervals was divided into periods, and correlation with general characteristics was identified to see what emotional burdens exist as the lengths of flight interval increased. As a result, burdened flight intervals and the Pilot Flying(PF) intervals were identified as a statistically significant variables. In the case of the Pilot Flying interval, the level of stress was confirmed to be worse as the flying interval was elongated, and in the case of the burdened flying interval, the tendency of the stress index were lower as the period increased. Through this study, pilots who experienced reduced flight times were found to be accompanied by considerable amount of emotional burden proportionate to the length of the interval period.

• The Korean Journal of Emergency Medical Services
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• v.7 no.1
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• pp.119-126
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• 2003

The results of analyzing the questionnaires with 119 emergency staffs working in Gwangju and Jeonnam region are as follows. 1. The whole stress score was mean 2.94 and the degree of stress from personal relationship was highest as 3.22. 2. There were significant differences in possession of qualification related to public health and medical treatment (F=3.090, p=.030) in service factors, total career of emergency staffs (F=2.979, p=.023) in working environment factors, age (F=2.835, p=.042) and sex (F=2.375, p=.019) in social position factors, possession of medical qualification (F=3.995, p=.010) and household account burden (F=2.777, p=.045) in personal relationship factors. 3. There were correlations (p=.475) between working environment factors and social position (p<0.01) and correlations (p=.508) between working environment factors and personal relationship factors (p<0.01). There was correlation (p=.415) between social position and personal relationship factors(p<0.01). More concrete research that examines whether current fire station operation system is desirable or not by comparing the degree of stress of the whole 119 emergency staffs in Korea is needed and it is considered that real allowance level should be secured to reduce their stresses and facility and guarantee system to satisfy their demands for welfare are required.

• Journal of Korean Academy of Nursing Administration
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• v.15 no.3
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• pp.314-324
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• 2009

Purpose: This research was conducted to investigate the nurses' awareness and behavior on coaching and its relation with job characteristics in a hospital. Methods: Total 300 nurses in a university affiliated hospital were surveyed with questionnaires between April and May, 2008. The data was analyzed using SAS 9.1. Results: The data showed that 88.9 % of nurses responded the need of coaching training program while only 80.9% of general nurses and 75.7% preceptor nurses would like to participate in the training. The current level of knowledge for coaching was not different by the age, education level, and career. However, coaching behavior and job characteristics were significantly higher in the nurse managers than in general nurses or preceptors. The correlation between coaching behavior and job characteristics were identified. Conclusion: The gaps between the perceived necessity of coaching program implementation and willingness to participate in the coaching program were due to worry about the burden of extra hours needed to participate the program. To introduce coaching program to a nurses' organization successfully, the efforts should be made to develop the coaching training program for nurses based on the results and to support them systematically.

• The Journal of Fisheries Business Administration
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• v.51 no.1
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• pp.53-66
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• 2020

The Ministry of Maritime Affairs and Fisheries is supporting the "Environmentally Friendly Fisheries Promotion and Private Assistance Project" to increase production of eco-friendly, high-value-added foods. Private-backed operators selected for the project will have an economic opportunity to build, expand or refurbish eco-friendly fishing grounds. To facilitate this, the scope of project support was expanded after 2015 and an opportunity was prepared for private subsidy projects to grow to a new level in terms of quality and quantity by switching to a public offering project. However, starting in 2017, demand from the private sector will plunge and selected projects will be delayed or the project implementation rate will be lowered. It was a time for subsidy-related laws and systems to be reinforced but private subsidy projects do not temporarily shrink simply due to the increased administrative burden on private subsidy operators on subsidy management. It plans to review the correlation between laws and systems related to the construction of fish farms and suggest ways to enhance the efficiency of implementation so that economic advantages, the biggest advantage of the private subsidy project, can be recovered within the current legal system.

• Quality Improvement in Health Care
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• v.28 no.2
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• pp.2-13
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• 2022

Purpose:This study aimed to identify the effect of work interruption that influenced workload and perception of patient safety culture on ward nurses. Methods: Participants were 184 ward nurses, with more than 12 months of work experience, from two tertiary hospitals in S city. A descriptive correlational study design was used. Collected data were analyzed using descriptive statistics, t-test, ANOVA, Mann-Whitney U test, Kruskal-Wallis test, Pearson's correlation, and hierarchical multiple regression analysis via SPSS version 27.0. Results: The results showed that general wards nurses had a higher degree of work interruption (t=5.632, p<.001) and workload (t=3.603, p<.001) compared to comprehensive nursing care service wards nurses. More interruption in nursing work caused more burden on work (γ=.440, p<.001) and led to lesser perception of patient safety culture (γ=- .199, p=.007). Finally, the regression analysis showed that work interruption had a statistically significant relevance on nurses' workload (F=20.582, p<.001) and perception of patient safety culture (F=8.792, p<.001). Conclusion: To alleviate ward nurses' work interruption and decrease the negative effect on workload and perception of patient safety culture, it is necessary to mediate nurse staffing level and the number of assistants and utilize the environment.