• Bulletin of the Korean Space Science Society
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• 2010.04a
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• pp.34.4-34.4
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• 2010

We present the properties of globular cluster systems for 10 early-type galaxies in low density environments obtained using deep images from the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST). Using the ACS Virgo Cluster Survey as a counterpart in high-density environments, we investigate the role of environment in determining the properties of their globular cluster systems. We detect a strong colour bimodality of globular cluster systems in half of our galaxy sample. It is found that there is a strong correlation between the colour and richness of globular cluster populations and their host galaxy luminosities: the less bright galaxies possess bluer and fewer globular clusters as also seen in rich cluster environments. However, the mean colour of globular clusters in our field sample are slightly bluer than those in cluster environments at a given galaxy luminosity, and the colour of the red population has a steeper slope with absolute luminosity. By employing the YEPS simple stellar population model, the colour offset corresponds to metallicity difference of $\Delta$[F e/H ] ~ 0.15 - 1.20 or an age difference of $\Delta$age ~ 2 Gyr on average, implying that GCs in field galaxies appear to be either less metal-rich or younger than those in cluster galaxies. Although we have found that galaxy environment has a subtle effect on the formation and metal enrichment of GC systems, host galaxy mass is the primary factor that determines the stellar populations of GCs and the galaxy itself.

• Journal of the Korean Statistical Society
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• v.32 no.3
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• pp.299-309
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• 2003

Let ${\pi}_1,...,{\pi}_{k}$k($\geq$2) independent logistic populations such that the cumulative distribution function (cdf) of an observation from the population ${\pi}_{i}$ is $$F_{i}\;=\; {\frac{1}{1+exp{-\pi(x-{\mu}_{i})/(\sigma\sqrt{3})}}},\;$\mid$x$\mid$<\;{\infty}$$ where ${\mu}_{i}(-{\infty}\; < \; {\mu}_{i}\; <\; {\infty}$ is unknown location mean and ${\delta}^2$ is known variance, i ＝ 1,..., $textsc{k}$. Let ${\mu}_{[k]}$ be the largest of all ${\mu}$'s and the population ${\pi}_{i}$ is defined to be 'good' if ${\mu}_{i}\;{\geq}\;{\mu}_{[k]}\;-\;{\delta}_1$, where ${\delta}_1\;>\;0$, i = 1,...,$textsc{k}$. A selection procedure based on sample median is proposed to select a subset of $textsc{k}$ logistic populations which includes all the good populations with probability at least $P^{*}$(a preassigned value). Simultaneous confidence intervals for the differences of location parameters, which can be derived with the help of proposed procedures, are discussed. If a population with location parameter ${\mu}_{i}\;<\;{\mu}_{[k]}\;-\;{\delta}_2({\delta}_2\;>{\delta}_1)$, i ＝ 1,...,$textsc{k}$ is considered 'bad', a selection procedure is proposed so that the probability of either selecting a bad population or omitting a good population is at most 1­ $P^{*}$.

• Journal of muscle and joint health
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• v.19 no.3
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• pp.329-339
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• 2012

Purpose: This study was to examine the effect of perceived health status, sleep and depression on quality of life of older people in the elderly school. Methods: A cross-sectional descriptive study was conducted with a survey of 155 older persons in person 2 elderly school at J City. The data were analyzed with t-test, ANOVA, Pearson's correlation coefficients, and multiple regression using SPSS WIN 18.0 program. Results: The mean score of the quality of life was 8.10 (SD=8.79). Quality of life was significantly different by educational levels (F=4.711, p=.001). The result of the regression indicated that perceived health status, sleep, and depression explained 18.5% of variance in quality of life. Conclusion: Perceived health status, sleep and depression were associated with quality of life in the elderly. It is necessary to develop nursing strategies for the improvement of quality of life, considering health status, sleep, and depression in the elderly.

• Journal of Korean Clinical Nursing Research
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• v.17 no.1
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• pp.16-26
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• 2011

Purpose: The purpose of this study is to investigate nurses readiness to self-directed learning and its correlations with nursing practice competence in a tertiary hospital in Seoul, Korea. Methods: A cross sectional survey design was utilized to assess nurses readiness to self-directed learning and job performance. The data used in this study were obtained from 286 nurses who have been working on general ward for over 1 year. Data were analyzed by ANOVA, t-test, Pearson's correlation analysis, and multiple regression using SAS 9.1 program. Results: The mean score of the readiness to self-directed learning is 3.56 and that of nursing practice competence is 2.71. The readiness to self-directed learning was statistically different according to level of education, and clinical work experience. Nursing practice competence was also significantly different according to level of education, clinical work experience, marital status, age, and working division. The readiness to self-directed learning and nursing practice competence seem to have significant positive correlation to each other (r=.555, p<.001). The readiness to self-directed learning explains 32.0% of nursing practice competence (F=20.20, p<.001). Conclusion: These findings indicate that program development for enhancing the readiness to self-directed learning is needed to improve nursing practice competence. We also need continuous efforts to improve nurses initiatives and creativity.

• Korean Journal of Occupational Health Nursing
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• v.28 no.1
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• pp.36-43
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• 2019

Purpose: The purposes of this study were to investigate sleep quality and the related factors among clinical nurses. Methods: Data were collected from 208 nurses in general hospitals through self-report. Pittsburgh Sleep Quality Index (PSQI), Korean Epworth Sleepiness Scale (KESS), Insomnia Severity Index (ISS) were used. The data were analyzed t-test, ANOVA, $Scheff{\acute{e}}$ test, and multiple regression using the SPSS 20.0 program. Results: The mean scores of the subjects were $7.58{\pm}3.61$ on daytime sleepiness, $9.93{\pm}6.22$ on insomnia, and $7.29{\pm}3.05$ on sleep quality. The sleep quality in clinical nurses significantly influenced by insomnia (${\beta}=.55$, t=8.14, p<.001), daytime sleepiness (${\beta}=.16$, t=2.83, p=.005), and work satisfaction (${\beta}=-.15$, t=-2.35, p=.020). The three variables explained 55.9% of variance of sleep quality (F=10.73, p<.001). Conclusion: Sleep quality was influenced by daytime sleepiness, insomnia, and job satisfaction. To improve sleep quality, hospitals managers or leaders need to provide sleep promotion programs for preventing daytime sleepiness and insomnia.

• Toxicological Research
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• v.35 no.3
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• pp.233-239
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• 2019

Nerium oleander (N. oleander) is a well-known poisonous shrub that is frequently grown in gardens and public areas and contains numerous toxic compounds. The major toxic components are the cardiac glycosides oleandrin and neriin. The aim of our study was to evaluate the toxic effects of an ethanolic N. oleander leaf extract on haematological, cardiac, inflammatory, and serum biochemical parameters, as well as histopathological changes in the heart. N. oleander extract was orally administered for 14 and 30 consecutive days at doses of 100 and 200 mg of dried extract/kg of body weight in 0.5 mL of saline. The results showed significant increases in mean corpuscular volume, white blood cell counts, platelet counts, interleukins (IL-1 and IL-6), tumour necrosis factor alpha, C reactive protein, alanine aminotransferase, lactate dehydrogenase, creatine kinase and creatine kinase MB, especially at high doses. Marked pathological changes were perceived in the heart tissue. Thus, it can be concluded that exposure to N. oleander leaf extract adversely affects the heart and liver.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.26 no.2
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• pp.107-116
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• 2019

Purpose: The purpose of this study was to identify factors with nursing students's confidence in performing fundamental nursing skills. The focus was on professionalism and self-efficacy. Method: For the sample 258 fourth graders of nursing students were recruited in two universities located in Gyeongnam or Ulsan. Data were analyzed using t-test, Pearson's correlation coefficients, and hierarchical multiple regression. Results: The mean score for confidence in performing fundamental nursing skills was $3.71{\pm}0.58$. Nursing professionalism and self-efficacy were positively correlated with confidence in performing fundamental nursing skills. Analysis using multiple regression showed that 27% of factors predicting confidence in performance of fundamentals of nursing practice (F=16.43, p<.001) included nursing professionalism (${\beta}=.37$, p<.001), self-expression (${\beta}=.15$, p=.009), and self-efficacy (${\beta}=.14$, p=.029). Conclusion: Findings show that nursing professionalism is one of the major factors influencing confidence in performing fundamental nursing skills. In order to improve the confidence in performing fundamental nursing skills, it is necessary to establish effective educational strategies that firmly enhance nursing professionalism and improve self-efficacy in nursing students.

• Journal of the Korean Society of School Health
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• v.34 no.3
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• pp.170-178
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• 2021

Purpose: The purpose of the study was to investigate the effect of major satisfaction, self-esteem and nursing professionalism on college (life) adjustment in nursing students. Methods: Data were collected using structured questionnaires from 179 nursing students at a university located in Seoul. The collected data were analyzed through the mean and standard deviation, t-test, ANOVA, Pearson's correlation, and multiple regression analysis using SPSS 27.0. Results: As a result, the average major satisfaction was 4.08 out of 5, the average self-esteem was 3.02 out of 4, the average nursing professionalism was 3.87 out of 5, and college life adjustment was 3.77 out of 5. Major satisfaction, self-esteem, and nursing professionalism were statistically correlated with college life adjustment. Self-esteem (β=.33, p<.001), major satisfaction (β=.24, p=.003), and major satisfaction at the time of admission (β=.22, p=.002) had a significant effect on college life adjustment. These factors explained 47.7% of college life adjustment (F=24.22, p<.001). Conclusion: The findings suggest there is a need to develop an educational program for nursing students to improve their self-esteem and major satisfaction.

• Journal of Animal Science and Technology
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• v.64 no.5
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• pp.997-1007
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• 2022

Delayed healing associated with distal limb wounds is highly challenging in equine clinical practice. This study aimed to evaluate healing rates between chronic non-granulating wounds of horse distal limbs that were treated with maltodextrin/ascorbic acid gel alone or in combination with povidone-iodine 1% solution and those treated with povidone-iodine 1% only throughout the study period (35 days) in clinical settings. The study was conducted on 18 adult horses (3-15 years old). Based on the treatment regimen utilized, the horses were divided into three groups (n = 6), with each group having a similar mean wound area. The percentages of wound contraction, epithelialization, and overall wound healing were determined weekly for each wound. By the end of the study, the total wound healing percentage was significantly increased between the study groups (p < 0.05). The use of maltodextrin/ascorbic acid gel resulted in considerable wound contraction, rapid epithelialization, and complication-free wound healing. Based on the findings of this study, maltodextrin/ascorbic acid gel, independently or in combination with a 1% povidone-iodine solution, might be applied as a safe and effective wound healing promoting agent in horses with chronic non-granulating wounds.

• The Journal of Korean Society for School & Community Health Education
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• v.24 no.1
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• pp.33-46
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• 2023

Objectives: This study aimed to confirm the degree of health consciousness, health self-efficacy, self-care agency of nursing students and the factors that affect health promoting behaviors. Methods: From June 7 to June 20 in 2022, the structured questionnaire was used for 255 nursing students. Data were analyzed by descriptive analysis, mean comparison(t-test, ANOVA), correlation analysis(Pearson's correlation coefficient) and multiple regression using SPSS/WIN 25.0. Results: The health promoting behaviors had positive correlations with health consciousness, health self-efficacy, and self-care agency. And the prediction factors influencing health promoting behaviors were health self-efficacy(𝛽=.40), health consciousness(𝛽=.19), age over 40 (𝛽=-.23, p<.001), exercise six times a week or more(𝛽=.22, p=<.001), and having breakfast six times a week or more(𝛽=.11, p=.025). The explanatory power on health promoting behaviors from these variables was 53%(F=20.72, p<.001). Conclusions: In order to improve the health promoting behaviors of nursing students, various ways to increase the active changes should be sought, and program should be prepared to improve their health promotion behaviors in the future.