• Asian-Australasian Journal of Animal Sciences
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• v.14 no.12
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• pp.1683-1689
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• 2001

The levels of urea nitrogen both in blood (BUN) and milk (MUN), and milk protein (MP) reflect protein and energy intake in dairy herd feeding. Blood and milk constituents may be changes rhythmically and influence by different sampling time within a day and after feeding. Trials were conducted using five dietary treatments in both lactating and dry cows to study the effects of sampling time on concentrations of BUN, MUN and whole blood ammonia nitrogen (BAN) in practical dairy cow feeding in Taiwan. The conventional feed ingredients and forages including corn silage, alfalfa hay, timothy or pangola hay and corn grain were used as major source of the diet to follow practical dairy cow feeding. Five different diets were varying in amounts (low=L; standard=S; high=H) of crude protein (P) and energy (E) according to the NRC (1989). The energy to protein ratios in kcal/kg for the PSES, PLES, PHES, PSEH and PSEL were 10.82, 12.54, 9.41, 12.53 and 9.13 in lactating cows, and 11.38, 13.33, 9.78, 13.28 and 9.74 in dry cows, respectively. Results showed that after feeding at 9:30, BUN reached peak at 13:30 and was significantly higher than those to that sampled at 14:30 to 18:30 (p<0.05) in dry cows. Therefore the best blood sampling time for urea nitrogen assay in dry cows is 4 hours after morning feeding. In lactating cows, BUN of 13:30 was significantly higher than those of 8:30 to 11:30 (p<0.05), but there were no significant difference between the BUN values of other sampling time. Hence the suitable blood sampling time for BUN value in lactating cows was located on 3 to 8 hours after morning feeding, but the best time was 4 hours after morning feeding. MUN content is significantly higher in the afternoon collected bulk milk than the fore-strip morning milk (p<0.05), therefore the best sampling time for MUN is from afternoon collected bulk milk. Diurnal BAN changed without traceable rhythmic pattern and was negatively correlated to the BUN (r = -0.78). It is suggested that BAN may not be a good indicator for monitoring dairy cow feeding.

• Journal of the Korean Society of School Health
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• v.30 no.2
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• pp.136-145
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• 2017

Purpose: This study was conducted to examine the degree of suicidal ideation, social support and self-esteem on depression in middle school students. Methods: The study, based on a correlation study design, selected participants from five middle schools by convenience sampling. Data were collected from April 19 to June 13, 2015 from the 427 participants included in the study. The data were analyzed using SPSS / Win 20.0. Results: There was a significant correlation between depression, self esteem, social support, and suicidal ideation. Depression was negatively correlated with self-esteem(r=-.47, p<.001) and social support(r=-.45, p<.001), while being positively correlated with suicidal ideation(r=.64, p<.001). Conclusion: The findings indicate that depression in middle school students can increase the risk of suicide. Self-esteem and social support of middle school students are also important resources for reduce depression and suicide prevention.

• Journal of Korean Public Health Nursing
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• v.11 no.1
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• pp.26-38
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• 1997

This study has been done for the purpose of identifying performance of health promoting behavior and the variables affecting health promoting behavior in college students. 350 college students at D university in P city were chosen by cluster sampling. The data were collected by questionnaire from December 4 to December 20, 1996. The instruments used for this study included health promoting lifestyle, self-esteem, health locus of control and perceived health status. The data were analyzed by use of mean, ANOVA, Pearson correlation coefficient and stepwise multiple regression. The results are summarized as follows; 1. The average item score for the health promoting behavior was low at 2.49. In the sub-categories, the highest degree of performance was , 2.99, and the lowest degree was , 1.43. 2. There was no statistically significant difference between the mean for health promoting behavior of the female, 2.49 and that of the male, 2.48(t=-0.3664, p=.7143). But there was statistically significant difference among the mean for health promoting behavior classified by grade(F=3.67, p=.0126). 3. Performance of health promoting behavior was positively correlated with and , and negatively correlated with and . 4. The most important factor affecting performance of health promoting behavior was .

• Ecology and Resilient Infrastructure
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• v.4 no.2
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• pp.93-96
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• 2017

Spatial variations of physicochemical and microbiological variables were examined to understand spatial heterogeneity of those variables in intertidal flat. Variograms were constructed for understanding spatial autocorrelations of variables by a geostatistical analysis and spatial correlations between two variables were evaluated by applications of a Cross-Mantel test with a Monte Carlo procedure (with 999 permutations). Water content, organic matter content, pH, nitrate, sulfate, chloride, dissolved organic carbon (DOC), four extracellular enzyme activities (${\beta}-glucosidase$, N-acetyl-glucosaminidase, phosphatase, arylsulfatase), and bacterial diversity in soil were measured along a transect perpendicular to shore line. Most variables showed strong spatial autocorrelation or no spatial structure except for DOC. It was suggested that complex interactions between physicochemical and microbiological properties in sediment might controls DOC. Intertidal flat sediment appeared to be spatially heterogeneous. Bacterial diversity was found to be spatially correlated with enzyme activities. Chloride and sulfate were spatially correlated with microbial properties indicating that salinity in coastal environment would influence spatial distributions of decomposition capacities mediated by microorganisms. Overall, it was suggested that considerations on the spatial distributions of physicochemical and microbiological properties in intertidal flat sediment should be included when sampling scheme is designed for decomposition processes in intertidal flat sediment.

• Journal of Electrical Engineering and Technology
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• v.8 no.6
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• pp.1615-1625
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• 2013

Modelling and simulating the wind power intermittent behaviour are the basis of the planning and scheduling studies concerning wind power integration. The wind power outputs are evidently correlated in space and time and bring challenges in characterizing their behaviour. This paper provides a methodology to model and simulate the clustered wind power considering its spatio-temporal correlations using the theory of copula. The sampling approach captures the complex spatio-temporal connections among the wind farms by employing a conditional density function calculated using multidimensional copula function. The empirical study of real wind power measurement shows how the wind power outputs are correlated and how these correlations affect the overall uncertainty of clustered wind power output. The case study validates the simulation technique by comparing the simulated results with the real measurements.

• Korean Journal of Human Ecology
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• v.9 no.2
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• pp.189-203
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• 2000

This study was proposed preschooler consumer education curriculum to give effect at a preschooler education institute and was investigated into relations with practical degree, needful degree and demandable degree according to preschooler teacher's characteristics. The survey of this research was conducted by means of questionnaire with 548 teachers of nursery and kindergarten in Seoul. Also it was carried out two stages cluster sampling, personal interview. the statistics used for data analysis was frequency, mean, percentile, t-test, one way ANOVA, Pearson's r, and regression using the SPSS/PC+ program. The results and findings of this study were summarized as follows. 1) Practical degree on total preschooler consumer education was looked into being low, also needful degree on total preschooler consumer education examined being very high. 2) Demandable degree on preschooler consumer education differed significantly according to preschooler education institute, preschooler's age in charge. 3) Practical degree on preschooler consumer education correlated positively to needful degree on preschooler consumer education. And practical degree on preschooler consumer education correlated negatively to demandable degree on preschooler consumer education. 4) Preschooler teacher's age and career had affected to money management in practical degree by regression analysis used to dummy variable related with characteristics of preschooler teacher.

• Journal of Korean Academy of Nursing Administration
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• v.14 no.4
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• pp.440-447
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• 2008

Purpose: This study was to identify the factors affecting utilization of clinical nurses' hospital information system. Method: Using a convenient sampling, 450 nurses from 9 secondary or tertiary university hospitals in B metropolitan city were selected. Results: The extent that nurses utilize the hospital information system was 3.22 point on average. The hospital information system utilization was positively correlated with personal information utilization skill, information-oriented education, attitude toward computer, and support of the chief manager, while as negatively correlated with the organizational atmosphere. The causal factors of influencing on the hospital information system utilization were personal information technology, education experience of the hospital information system, age, attitude toward computers, education level and support of the chief manager. The total eigenvalue of the variables was 38%. The major variables of influencing on the hospital information system utilization were the personal information technology and education experience of the hospital information system. Conclusions: Thus, nurse managers should provide training courses to improve personal information technology of nurses, and consistently promote them so that nurses can readily apply the hospital information system which have been recently introduced in various ways and thus improve the efficiency of nursing.

• Women's Health Nursing
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• v.15 no.4
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• pp.294-302
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• 2009

Purpose: This study was done to compare the level of parenting stress, entrapment, satisfaction of paternal support, and marital satisfaction between employed and non-employed mothers and to identify significant predictors for parenting stress. Methods: With a cross-sectional, correlational study design, a sample of study was consisted of 175 women who were employed or non-employed with preschool children through convenience sampling. Data were collected with a structured self-administered questionnaire and analyzed by $x^2$-test, t-test, Pearson's coefficients, and multiple regression analysis using SPSS program. Results: Results shows that the level of parenting stress of non-employed mothers was significant higher than that of employed mother. The parenting stress was negatively correlated to marital satisfaction and positively correlated to entrapment in both of them. Entrapment was significant predictors explaining parenting stress in both of them and level of maternal education and satisfaction of paternal support and was significant predictors explaining parenting stress of non-employed mothers. Conclusion: Entrapment was very important factors to management parenting stress of both employed and non-employed mothers. Especially, satisfaction of paternal support and marital satisfaction was very important factor to manage parenting stress of mothers.

• Journal of Korean Public Health Nursing
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• v.27 no.3
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• pp.539-550
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• 2013

Purpose: The objectives of this study were to investigate the level of meaning in life(MIL) among university students as well as identify the effects of death perception, including good death and concerns about dying, and self-esteem on MIL. Methods: A questionnaire survey was developed and carried out using a convenient sampling method (N=301). Data were analyzed by applying descriptive statistics, t-test, ANOVA, Duncan test, Pearson's correlation coefficient, and stepwise multiple regression. Results: The average score for MIL was 4.70 on a 7-point scale. The factor of purpose of life received highest score among all factors in MIL. MIL was positively correlated with age, good death, and self-esteem. However, concerns about dying were negatively correlated with MIL. MIL showed a strong association with self-esteem(r=.72). Specifically, self-esteem(${\beta}$=.608), satisfaction of school life(${\beta}$=.190), relationship with parents(${\beta}$=.180), good death(${\beta}$=.080), school grades(${\beta}$=.078), and age(${\beta}$=.074) all significantly influenced MIL. These variables accounted for 61.0% of the total variance. Conclusion: The results show that self-esteem is an important factor for MIL among university students. Therefore, self-esteem should be carefully considered to increase their MIL. These research findings can be utilized to support programs such as counseling and education of university students.

• Journal of Korean Academy of Nursing Administration
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• v.17 no.1
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• pp.5-13
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• 2011

Purpose: The purpose of this study was to examine the effect of patient perception of the switching cost and negative word of mouth on revisit intention of patients in out-patient departments (OPDs) of general hospitals. Method: The participants were 306 patients in general hospital, selected through convenience sampling. Data were collected using a structured questionnaire and analyzed using descriptive statistics, Spearman correlation coefficient, and logistic regression with SPSS Win. Results: Relational switching cost was positively correlated with revisit intention (r=.58, p=<.001), but not financial switching cost or procedural switching cost. Negative word of mouth was negatively correlated with revisit intention (r=-.22, p=<.001). The significant predictors influencing revisit intention in patients was relational switching cost. Conclusion: The findings of this study suggest that hospital and nursing managers should seek to bolster perceptions of switching costs and negative word of mouth, which subsequently increases revisit intentions in small hospitals located in the country as well as urban large hospitals.