• The Journal of the Korea Contents Association
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• v.21 no.1
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• pp.352-362
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• 2021

This study was conducted to investigate the relationship between major satisfaction, depression, self esteem and life stress among college dental hygiene students. This study targeted 227 dental hygiene student in one school. Data were analyzed using descriptive analyses, t-tests, ANOVA, Pearson's correlation, and Hierarchical multiple regression with the SPSS WIN 21. program. The results of this study were as follows: The average score of major satisfaction was 3.65±.59, the score of depression was 1.74±.43, the score of self esteem was 3.59±.70, the score of life stress was 1.50±.33. Life stress was negatively related to major satisfaction and self esteem, and positively related to depression. The factors influencing the life stress of dental hygiene students were grade, economic status, major satisfaction, depression. Overall, to decrease life stress among dental hygiene student, it is necessary to develop educational method and program that can prevent and mitigate depression and can increase major satisfaction.

• Korean Journal of Environmental Agriculture
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• v.42 no.3
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• pp.193-202
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• 2023

Residue monitoring of propiconazole (PCZ) in cabbage, shallot, and spinach was conducted under multi-trial greenhouse conditions. This study aimed to understand the fate of the applied fungicide in these vegetables. Furthermore, the associated health risk of PCZ in leafy vegetables was assessed through dietary risk assessment. Commercially available PCZ (22% suspension concentrate) was administered thrice according to the OECD fungicide application interval guideline. The plant samples were extracted using a slightly modified QuEChERS technique and analyzed using gas chromatography-tandem mass spectrometry. The average PCZ recovery was between 84.5% and 117.6%, with a <5% coefficient of variance. The dissipation of PCZ residue in cabbage, shallot, and spinach after 14 days was 96%, 90%, and 99%, respectively, with half-lives of <5 days. Meanwhile, dietary risk assessments of PCZ residues in the studied vegetables using the risk quotient (RQ) were significant < 100 (RQ < 100). Thus, the population groups considered in this study were not at substantial risk from consuming leafy vegetables sprayed with PCZ following critical, good agricultural practices.

• Journal of the Korean Society for information Management
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• v.41 no.2
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• pp.317-351
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• 2024

This study aims to determine the impact of digital literacy skills of middle-aged and older people using public libraries on their life satisfaction. For this study, a survey was conducted on 192 middle-aged and older people aged 40 to 64 living in area G. The collected data were analyzed using the statistical package SPSS 27 program. The analysis methods in this study included frequency analysis, descriptive statistical analysis, t-test, one-way ANOVA, Duncan's multiple range test for post-hoc analysis, and regression analysis. The results of this study are as follows: First, digital literacy competency has a significant positive impact on the life satisfaction of middle-aged and older adults; as their digital literacy skills improve, their life satisfaction increases. Second, digital literacy competency varies based on gender, education level, employment status, and average monthly income, influencing their engagement in activities such as study or work. Additionally, higher levels of digital literacy competency, as determined by the highest level of education, positively affect life satisfaction, leisure activities, and cultural life.

• Journal of the Health Care and Life Science
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• v.11 no.2
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• pp.431-439
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• 2023

This study investigated the effect of oral health on health-related quality of life in cancer patients and cancer survivors using data from the 7th Korea National Health and Nutrition Examination survey. Data analysis was a complex sample analysis using SPSS/WIN 26.0. As a result of conducting complex sample logistic regression analysis to investigate factors affecting the quality of life of cancer patients and cancer survivors, the average quality of life was 1.18 points for cancer patients and 1.16 points for cancer survivors. The quality of life of cancer patients was significantly lowerer when they had discomfort chewing and speech difficulties, and needed dentures. Cancer suvivors was significantly lowerer when they had speech difficulties. Therefore, it is necessary to recognize the importance of oral care for cancer patients and cancer survivors, and to develop and utilize oral health care programs so that continuous and professional access to oral health care is necessary.

• Korean Journal of Human Ecology
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• v.7 no.1
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• pp.53-60
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• 1998

The purposes of this study are to investigate the leisure life, focused on the leisure participation of the elderly living alone or living with their spouse in Chungbuk, and to provide some suggestions from the perspective of the well-being of the elderly. Two hundred fourty four elderly persons were selected, and questionnaire was utilized for collecting data. The results are as follows: The elderly who were living alone or living with their spouse frequently participated in time spending activities and family oriented activities. The structure of leisure participation differed significantly according to the respondent's age, educational level, health status, and monthly average income. The significant independent variables influencing the leisure participation of the elderly were educational level and monthly average income, and further, the most important variable in influencing the elderly leisure participation was the educational level.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.58 no.2
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• pp.190-195
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• 2013

In this study, the response of 22 soybean cultivar sprouts to flooding stress was investigated. After sprouts were subjected to flooding stress for 10 days at the V4-V5 growth stages, their dry weights were compared. All plants were kept in a greenhouse under natural light conditions, an average daytime temperature of $35.6{\pm}5.3^{\circ}C$ and an average nighttime temperature of $18.2{\pm}1.7^{\circ}C$. Soybeans were grown in a concrete bed filled with silt loam soil. Subjecting plants to flooding stress resulted in a large reduction in plant dry weight, plant height, number of nodes, and number of leaves. Cultivars differed significantly in their responses to flooding stress, as indicated by these characteristics (p<0.05). Soybean cultivars were classified into three groups based on their degree of flood tolerance: strong, moderate, and weak. Hannamkong, Namhaekong, Sobaegnamulkong, and Sorogkong had strong tolerance for flood conditions. Tawonkong, Pureunkong, Eunhakong, Myeongjunamulkong, Doremikong, Saebyeolkong, Paldokong, Sowonkong, Pungsannamulkong, Dagikong, Dachaekong, and Anpyeongkong had weak tolerance for flood conditions.

• Journal of Families and Better Life
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• v.15 no.1
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• pp.13-26
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• 1997

The study was to explore the housework time management strategies and time spent in housework of employed wives and to understand the variables influenced on them. The samples were composed of 271 employed wives living in Chunlabuk-Do. The results were as follows: 1) The employed wives spends average 4.5 hours a day on the housework. The significant differences were ground in the housework time related to all demo-graphic variables. 2) The level of the housework time management strategies of employed wives was lower than the average. The most influential variable on the housework time management strategies of employed wives was the level of education the monthly income and employment types. A employed wives with the higher work status education level and income level utilized more efficient time strategies. 3) The major strategy which influences the housework time is that of simplification. Especially occupation of housewives and type of house interact with the strategy of sim lification. That is as the housewives with the jobs of blue-collar production-technology and clergycal technology use the simplification strategy much their amount of housework time was reduced.

• Journal of Korea Society of Digital Industry and Information Management
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• v.6 no.1
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• pp.55-67
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• 2010

Decision problem called an optimal release policies, after testing a software system in development phase and transfer it to the user, is studied. The applied model of release time exploited infinite non-homogeneous Poisson process. This infinite non-homogeneous Poisson process is a model which reflects the possibility of introducing new faults when correcting or modifying the software. The failure life-cycle distribution used generalized gamma type distribution which has the efficient various property because of various shape and scale parameter. Thus, software release policies which minimize a total average software cost of development and maintenance under the constraint of satisfying a software reliability requirement becomes an optimal release policies. In a numerical example, after trend test applied and estimated the parameters using maximum likelihood estimation of inter-failure time data, estimated software optimal release time.

• Journal of the Korean Statistical Society
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• v.30 no.1
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• pp.89-98
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• 2001

Brown and Proschan(1983) introduced a model for imperfect repair. At each failure of a device, with probability p, it is repaired completely or replaced with a new device(perfect repair), and with probability 1-p, it is returned to the functioning state, but it is only recovered to its condition just prior to failure(imperfect repair or minimal repair). In this paper, we limit the number of consecutive minimal repairs by n. We find some useful properties about $\mu$$_{k}$, the expected time between the k-th and the (k+1)-st repair under he assumption that only minimal repairs are performed. Then, we assign cost to each repair and find the value of n which minimized the long-run average cost for a fixed p under the condition that the life distribution F os the device is DMRL.L.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.35 no.5
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• pp.72-79
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• 2003

Nalita wood (Trema orientalis), one of the fastest growing woods in the world, is characterized anatomical, morphological and chemical properties at annual growth ring level in order to investigate as papermaking raw material. The proportion of fibers and vessel was increased with an increase of growth ring (from pith to bark). The fiber length of Nalita was increased with increasing growth ring, and an average fiber length was about 817 um. The average basic density of Nalita was about 0.38 g/cc. The total lignin & holocellulose in Nalita were increased and ash & alcohol-benzene extract decreased from pith to bark. These values were about 23.5 - 24.4 ％, 78.1 - 80.1 ％, 1.04 - 0.92 ％ and 2.1 - 1.8 ％, respectively. The xylan was the predominant sugar in the hemicellulose of Nalita.