• The Korean Journal of Community Living Science
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• v.17 no.2
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• pp.15-30
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• 2006

The purpose of this study is to examine how the rural elderly assess the multi-dimensions of health. This includes the physical, mental and social dimensions of health, correlations among them, and whether there are gender differences and age-group (60's, 70's, 80 and over) differences. For this purpose, survey data was gathered from 881 rural elderly who live in a village. The statistical methods used for data analysis were descriptive statistics, t-test, ANOVA and correlations. The major findings of this study are as follows: Physical health was measured by self-rated health, ADL, IADL, and farmer symptoms. The respondents classified as 80 and over and female perceived their physical health more negatively. Mental health was perceived somewhat positively in general but female participants perceived their mental health more negatively than males. Social health of the rural elderly was relatively positive in comparison to the other dimensions of health. The rural elderly engaged in many social activities, and the majority of them had many social support networks composed of more than 12 persons. Relationships among the physical, mental and social health dimensions were different. The correlation of physical and mental health and the correlation of social and psychological health were statistically significant. However, the correlation of physical and social health had no significant meanings.

• Journal of Environmental Science International
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• v.29 no.7
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• pp.715-727
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• 2020

It is well known that atmospheric environments, including both meteorology and air quality, significantly affect public health, such as chronic lung disease and cancer, and respiratory infections. In this study, we have analyzed correlations between the number of daily respiratory outpatients and the atmospheric environments data for about ten years for the city of Busan, South Korea. The respiratory problem patients data have been categorized into two health-vulnerable groups by age over 65(DayPA_O65) and under 20(DayPA_U20), each of which shows relatively higher correlations with air quality and meteorology, respectively. However, time series analysis with factor separation results in that DayPA_O65 and DayPA_U20 show a higher relation with variance components and daily irregular factors of atmospheric concentrations, respectively.

• Journal of the Korean Society of Tobacco Science
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• v.7 no.2
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• pp.111-121
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• 1985

The present study was carried out to obtain some basic informations of the breeding of tobacco varieties. Genetically divergent 8 varieties, 3 flue-cured, 2 burley and 3 sun-cured tobaccos, were used in half diallel cross. In order to analyze the heterosis, combining abilities, modes of inheritance and correlations for some agronomic and chemical characters, 8 parents and 28 $F_2$ were tested. The results obtained were summarized as follows: The percentages of heterosis for yield, stem diameter, internode length and total sugar content in $F_2$ hybrid were positive , where-as those for the other characters were negative. Yield had significant positive genotypic and phenotypic correlations with plant height, days to flower, leaves per plant, leaf length, leaf width and leaf shape index (Leaf length/leaf width). General (GCA) and specific combining abilities (SCA) for all characters of $F_2$ hybrid were significant. In the effect of GCA, yield was greater in combinations of Bulgaria and Xanthi, days to flower and leaves per plant were those of Burley 21 and Va 528, leaf length and width were those of Coker 139, respectively. In the effect of SCA, the major part of characters were greater than those of others in the combinations of Burley 21, Va 528, Hicks.

• Journal of Preventive Medicine and Public Health
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• v.17 no.1
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• pp.211-215
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• 1984

Forty one male workers employed in an underwater construction field were surveyed in the viewpoints of epidemiological analysis of decompression sickness (caisson's disease). Nineteen out of the entire forty one workers have been, or had been suffering from decompression sickness (as 46.3% of incidence rate) after decompression. The results obtained were as follows: 1. There was a significant relation between duration of work and incidence of disease. 2. Type II (severe type) comprised majority of cases (16 cases, 84.2%) despite any significant correlations were not present between severity types and recompression times. 3. Most frequently cited symptoms were lower limb pain (89.5%), upper limb pain (79.0%), pruritus (68.4%) and so on, however, 10% of patients complained of neurological symptoms. 4. There were not any significant correlations between disease incidence and worker's age or relative body weight.

• Journal of Korean Society on Water Environment
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• v.28 no.3
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• pp.394-400
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• 2012

We drew the stage-discharge relations of Byeokgye Stream, located in Yangpyeong-gun, Gyeonggi-do, and analysed the correlation between items of water pollutants by measuring the flow rate and water pollutants thirty-four times from April 2010 to December 2010. The results showed that it tended to be low water season from April to June and from October and December, while tending to be water season from July to September. The average flow rate was $2.137\;m^3/sec:\;0.464\;m^3/sec$ in low water season and $13.970\;m^3/sec$ in high water season. The stage-discharge curve thereon was $Q=40.107{\times}(h-1.200)^{2.877}$. As to the correlations, the correlation between the water temperature and COD was 0.58, and the correlations of SS with BOD and COD were 0.46 and 0.40 respectively. The correlation between SS and T-P was 0.73, showing higher than other items.

• The Korean Journal of Health Service Management
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• v.6 no.2
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• pp.57-69
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• 2012

The purpose of this study was to investigate correlation with self-care behaviors and physiological index according to cognitive function of hemodialysis patients. The data were collected from 108 patients on hemodialysis in university hospital. The period of data collection was from January 4 to January 31, 2010. The instruments of research were MMSE, Self-care behavior scale for hemodialysis patients. The 17.6% of patients showed the cognitive disorder. Self-care behaviors of patients showed that normal cognitive function group was significantly higher than dysfunction group. Creatinine and parathyroid hormone of patients showed that normal cognitive function group was significantly lower than dysfunction group. The cognitive function of patients showed positive correlations with self-care behavior(r=.283, p=.003) and Kt/V(r=.214. p=.026), showed significant negative correlations with phosphorus(r=-.223, p=.020) and creatinine(r=-.318, p=.001). The results of this study can be used to develop nursing education program to improve self-care behaviors according to cognitive function of hemodialysis patients.

• The Journal of Korean Academic Society of Nursing Education
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• v.7 no.2
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• pp.217-228
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• 2001

This study was designed to compare the effect of internship and preceptorship on satisfaction of clinical practice in nursing students. A total of 46 third grade students were assigned to 2 groups; 23 to inturnship group, 23 to preceptorship group. Satisfaction scores of clinical practice instruction and practice environment in internship group were higher than satisfactory scores of preceptorship group. There were no difference between satisfactory scores of clinical practice contents, clinical practice hour and clinical practice environment in internship and preceptorship. Satisfaction scores on clinical practice weren't significantly correlated with school credits. There were significant correlations among clinical practice contents, practice environment, practice instruction and clinical practice hour. There were significant correlations among clinical practice instruction, practice environment and clinical practice evaluation. Clinical practice instruction was the highest factor predicting satisfaction of clinical practice. In stepwise multiple regression analysis, 100% of the variance in satisfaction of clinical practice was accounted for by clinical practice instruction(59.1%), clinical practice contents(14.9%), clinical practice environment(12.3), clinical practice hour(8.8%), and clinical practice evaluation(5.5%).

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.21 no.5
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• pp.282-290
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• 2009

A ceramic monolith heat exchanger is studied to find the performance of heat transfer and pressure drop by numerical computation and $\xi$-NTU method. The numerical computation was performed throughout the domain including fluid region in exhaust gas-side rectangular ducts, ceramic core and fluid region in air-side rectangular duct with the air and exhaust in cross flow direction. In addition, the heat exchanger was also analyzed to estimate the performance by conventional $\xi$-NTU method with several Nusselt number correlations for flow in rectangular duct from literature. By comparisons of both performances by the numerical computation and the $\xi$-NTU method, the effectiveness by $\xi$-NTU method was closest to the result by numerical computation within a relative error of 2.14% when Stephan's Nusselt number correlation was adopted to the $\xi$-NTU method among the several correlations.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.4
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• pp.1-7
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• 2013

In the next generation of mobile communication systems, high data rates and high capacity will be possible if multiple antennas are used at new frequencies. This paper presents the correlations between channel parameter path loss (PL), delay spread (DS), angular spread (AS) and K-factor established based on channel measurements. To avoid interference from Korean DTV broadcasting, we measured the channel characteristics in urban/rural/suburban areas on Jeju Island using a channel sounder and $4{\times}4$ antennas. The correlations between channel parameter show that the wireless channel characteristics can be determined and effective communication system design can be produced for use in similar environments.

• Journal of Korean Academy of Nursing
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• v.32 no.5
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• pp.684-693
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• 2002

This study was conducted to detect the correlations and the main factors influencing self-directedness in learning of nursing students. Method: The samples were composed of 224 nurse students who were from three nursing department in Seoul, Chungnam & Kyunbook. The reliability of 4 instruments was tested with Cronbach's $\alpha$ from .63 to .86. The data was analyzed using a SAS program for descriptive statistics, Pearson correlation coefficients and stepwise multiple regression. Result: The results were as follows: 1. The mean self-directedness score was 91.23 which was slightly high. The self-directedness in learning was influenced significantly by grade, perception of self-level, self-study in majoring and self-study except for majoring(F= 3.33-7.14, p<.05). 2. There were significant correlations between all the predictive variables and the self-directedness(r=.27-48, p<.01). 3. Stepwise multiple regression analysis showed that 35% of the self-directedness in learning of nursing students were significantly explained by self-esteem(23%), locus of control(6%), self-study except for majoring(2 kind, 2%), self study in majoring(good, 2%), and self-study except for majoring( above 3 kind, 2%). Conclusion: Based upon these findings, sociopsychological variables like self-esteem and locus of control are very important factor influencing self-directedness in learning of nursing students.