• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.1
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• pp.197-207
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• 2020

The purpose of this study was to identify the predictors of death anxiety among community-dwelling elderly cancer survivors in Korea. This study was a descriptive correlation study with 216 elderly cancer survivors who live in the jurisdiction of community health centers in Chugbuk province. Data of this study were collected from February 27 to March 15 2019 by a structured questionnaire. The data were analyzed using independent t-test, one-way ANOVA, Pearson's correlation coefficient, and hierarchical multiple regression. In the results, the mean score of death anxiety was 2.47±0.39 out of 4.0, while that of ego integrity was 2.60±0.29, depression 6.35±4.0, and awareness of a good death 2.97±0.35. Based on the hierarchical multiple regression analysis, subjects' awareness of a good death had the greatest impact on death anxiety (β = 0.255, p < .001), followed by depression (β = 0.185, p = .020) and religion (no= 1; β= 0.148, p = .021). These factors explained 16.4% of death anxiety (F=8.04, p<.001). Therefore, the results of this study are expected to be utilized as basic data for developing an intervention program that will be designed to reduce the death anxiety in elderly cancer survivors.

• Journal of Intelligence and Information Systems
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• v.10 no.3
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• pp.39-57
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• 2004

Many dairy producers periodically receive information about their bulk tank milk with reference to bulk tank somatic cell counts, standard plate counts, and preliminary incubation counts. This information, when collected over a period of time, in combination with bulk tank mastitis culture reports can become a significant knowledge base. Several guidelines have been proposed to interpret farm bulk tank milk bacterial counts. However many of the suggested interpretive criteria lack validation, and provide little insight to the interrelationship between different groups of bacteria found in bulk tank milk. Also the linguistic terms describing bulk tank milk quality or herd management status are rather vague or fuzzy such as excellent, good or unsatisfactory. The objective of this paper was to develop a set of fuzzy descriptors to evaluate bulk tank milk quality and herd's milking practice based on bulk tank milk microbiology test results. Thus, fuzzy logic based reasoning methodologies were developed based on fuzzy inference engine. Input parameters were bulk tank somatic cell counts, standard plate counts, preliminary incubation counts, laboratory pasteurization counts, non agalactiae-Streptococci and Streptococci like organisms, and Staphylococcus aureus. Based on the input data, bulk tank milk quality was classified as excellent, good, milk cooling problem, cleaning problem, environmental mastitis, or mixed with mastitis and cleaning problems. The results from fuzzy reasoning would provide a reference regarding a good management practice for milk producers, dairy health consultants, and veterinarians.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.11
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• pp.2075-2082
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• 2006

This paper presents modeling and optimization techniques for hish efficiency solar cell process on single-crystalline float zone (FZ) wafers. Among a sequence of multiple steps of fabrication, the followings are the most sensitive steps for the contact formation: 1) Emitter formation by diffusion; 2) Anti-reflection-coating (ARC) with silicon nitride using plasma-enhanced chemical vapor deposition (PECVD); 3) Screen-printing for front and back metalization; and 4) Contact formation by firing. In order to increase the performance of solar cells in terms of efficiency, the contact formation process is modeled and optimized using neural networks and genetic algorithms, respectively. This paper utilizes the design of experiments (DOE) in contact formation to reduce process time and fabrication costs. The experiments were designed by using central composite design which consists of 24 factorial design augmented by 8 axial points with three center points. After contact formation process, the efficiency of the fabricated solar cell is modeled using neural networks. Established efficiency model is then used for the analysis of the process characteristics and process optimization for more efficient solar cell fabrication.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.5
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• pp.660-670
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• 2016

This cross-sectional descriptive investigation attempted to identify the relationship among the symptoms, spiritual well-being, and depression experienced by patients undergoing hemodialysis. Data were collected from 146 patients at 6 hemodialysis clinics from October 15th, 2014 to January 15th, 2015. The Dialysis Symptom Index (DSI) was used to measure symptom experience, spiritual well-being was measured using the Spiritual Well-being Scale, and depression was assessed using the Center for Epidemiologic Studies Depression Scale (CES-D). The data were analyzed using ANOVA, the t-test, Scheffe's test, Pearson correlation, and hierarchical regression analysis. The mean score of the symptom experience was 26.43 (range: 0~85), the mean spiritual well-being score was 47.79 (range: 20~80), and the mean depression score was 10.56 (range: 0~35). It was found that greater existential well-being leads to lower depression (r=-.23, p=.004) and symptom experience (r=-.17, p=.045). Greater physical (B=.09) and emotional (B=.64) symptom experience leads to higher depression and the explanatory power of these factors was 52.1% (F=18.54, p<.001). Therefore, a comprehensive nursing intervention that can help reduce the symptom experience and increase the existential well-being in hemodialysis patients is needed to reduce their depression.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.5
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• pp.441-451
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• 2016

This study was conducted to determine the influence of satisfaction, self-esteem, and depression on adjustment of elderly patients in long-term care hospitals. The subjects were 116 elderly patients in 15 long-term care hospitals in B and K city. Data were collected from February 14 to March 30, 2015, and analyzed by t-rest, ANOVA, Scheff's test, Pearson correlation coefficients, and stepwise multiple regression. According to the results, there were significant differences in adjustment by religion, marital status, economic status, and perceived level of difficult problems. Adjustment was positively related to satisfaction and self-esteem. In addition, a negative correlation was observed between adjustment and depression. Meaningful variables that influenced the adjustment of elderly patients were depression, satisfaction, self-esteem, and religion. These factors accounted for 53.5% of the total variance in adjustment of the elderly patients in long-term care hospitals, and depression was the most influential factor. In conclusion, development and implementation of effective programs and strategies to reduce depression and to increase satisfaction with care and self-esteem is needed in order to enhance the adjustment of elderly patients in long-term care hospitals.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.5
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• pp.260-268
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• 2016

The objective of this study was to investigate the relationship among the variables and effects of depression and physical activity on fatigue in the elderly with chronic disease. A descriptive research design was employed in this study. In total, 500 elderly patients diagnosed with chronic disease were selected from 3 medical centers for the study. The measurements were used to examine their general characteristics, fatigue, depression, and physical activity. To analyze the data, statistical analyses, including ANOVA, t-test, Scheffe's test, Pearson's correlation coefficient, and hierarchical regression analysis, were conducted for the analysis of the data. The results indicated that the age, gender, and educational level in the first step model explained 6% of the effect on fatigue among the elderly with chronic disease. In addition, depression and physical activity in the second step model explained 16% of the effect on fatigue. These findings demonstrate the significance of (considering) depression and physical activity related to care plans when developing health-programs for decreasing fatigue and planning intervention strategies.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.5
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• pp.56-66
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• 2016

This study is a descriptive research study which attempts to determine the effects of self-efficacy, self-esteem, loneliness, stress, stress coping, and use expectancy on the smartphone addiction of university students based on the GIA model. Data was accumulated by means of questionnaire surveys from December 2015 to January 2016, which targeted 224 college students attending universities within Seoul and analyzed by descriptive statistical analysis, correlation analysis, and multiple regression analysis using SPSS 21.0. The average smartphone addiction score was $2.5{\pm}0.8$ (1.2-4.9) and 125 students were in the normal category (55 %), 90 in the danger category (40.2%), and 9 in the addiction category (4%). The correlation analysis showed that loneliness and stress had positive correlations with use expectancy, while self-esteem had a negative correlation. Loneliness, stress, use expectancy, and self-esteem proved to be the major factors affecting smartphone addiction and it was concluded that the development and application of programs which strengthen self-esteem are necessary. This study contributed to the research application and availability of the GIA model by analyzing the factors affecting smartphone addiction based on the GIA model.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.5
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• pp.3333-3343
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• 2015

The purpose of this study is to investigate factors related to substance use focusing on the sexual experiences and risky sexual behaviors among Korean adolescents. This study conducted with a secondary data analysis using the Seventh Korea Youth Risk Behavior Web-based Survey 2011 in South Korea. The study participants selected 75,643 Korean adolescents who were recruited anonymously through national web-based survey. Data were analyzed using descriptive statistics, rao-Scott ${\chi}^2$, and logistic regressions considering complex samples. Results indicated that substance use was significantly associated with sexual experiences such as sexual intercourse with the opposite sex (adjusted OR=5.691; 95% CI=4.223-7.670), sexual intercourse with the same sex (adjusted OR=21.180; 95% CI=14.704-30.507) and risky sexual behaviors such as sexual assaults (adjusted OR=9.936; 95% CI=7.217-13.680), date rape (adjusted OR=16.979; 95% CI=11.648-24.751), sexual intercourse after drinking (adjusted OR=6.564; 95% CI=3.986-10.810), unexpected pregnancies (adjusted OR=18.628; 95% CI=8.476-40.936), and sexually transmitted diseases (adjusted OR=21.872; 95% CI=13.920-34.367) in Korean adolescents. Findings of this study show that adolescents who use substances are more likely to engage in risky sexual behaviors. Therefore, intervention program should be designed to consider both substance use and sexual problems and to include the effective approaches at the family and school level.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.2
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• pp.1284-1291
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• 2015

This study was conducted as a descriptive study with the aim of identifying the effects of clinical nurses' resilience and social problem solving abilities on burnout. Data collection for the study was carried out between May $30^{th}$ and June $19^{th}$, 2013 by surveying 192 clinical nurses working in university medical centers and general hospitals located in D city. Measures were subjects' resiliency, social problem solving abilities, and burnout. For the analysis of the data, the statistical methods of frequency, mean and standard deviation, t-test, ANOVA, Pearson's correlation coefficients, and multiple regression analysis were employed. When the category of burnout was analyzed by general features, placement in a desired department and size of hospital, there were significant differences. Burnout correlated negatively with resilience and social problem solving abilities. Factors affecting clinical nurses' burnout were identified in the order of resilience, size of hospital, social problem solving abilities, and placement in a desired department and the explanatory power was 43.1%. The findings of the study indicate that in order to decrease clinical nurses' burnout, their resilience and social problem solving abilities have to be enhanced.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.6
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• pp.3870-3881
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• 2015

This study examined one of the contemporary issues on debate to identify any significant financial determinants on the cash holdings of the cheabol firms in the Korean domestic capital markets. Several important findings on the financial characteristics affecting the cash holdings were evidenced by utilizing various methodologies for statistical estimations. Financial or managerial implications with discussion were provided for the pronounced factors such as CASHFLOW, MVBV, REINVEST, and AGENCY. Assuming that the chaebol firms were overall subject to the financial constrains, they may increase or stockpile cash reserves as internal capital for future investment opportunities or repayment of existing debt, rather than external financing burdened by a high cost of capital. Given the on-going controversy on the optimal level of corporate cash holdings coupled with any foreseeable capital transfer among the associated nations through the investment vehicles such the FTAs (Free Trade Agreements) or TPP (Trans-Pacific Pacts), any empirical findings of the study may shed new light on identifying financial determinants which may significantly affect the level of cash holdings for the business conglomerates, the 'chaebol' firms, in the Korean capital markets.