• Korean Journal of Ichthyology
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• v.22 no.4
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• pp.238-248
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• 2010

We performed field investigations at six stations in Buk Stream of Goseong-gun, Gangwon-do, Korea, from May to September 2009 to understand the stream's fish fauna and community structure. In the survey, 31 species belonging to 20 families were collected. Dominant species by number was Zacoo koreanus (30.0%), and subdominant species were Pungitius kaibarae (9.4%) and Rhynchocypris steindachneri (9.3%). In biomass, the dominant species was Tribolodon hakonensis (35.5%), and subdominant species were Z. koreanus (22.5%) and Cobitis pacifica (7.5%). Eight Korean endemic fish species and two endangered species (P. kaibarae and Pungitius sinensis) were collected. In addition, four anadromous fish species (T. hakonensis, Oncorhynchus masou masou, O. keta, Gasterosteus aculeatus) and two amphidromus fish species (Plecoglossus altivelis altivelis and Gymnogobius urotaenia) were observed. Interestingly, we verified the existence of several fish species in Buk Stream where they have not lived before. Those species were previously reported to live only in rivers that run into the western and southern sea of Korea. Five of those species (Zacoo koreanus, Z. platypus, Silurus microdorsalis, Liobagrus andersoni and Coreoperca herzi) were reported in Buk Stream in the 1980s. The other species (Pungtungia herzi, Pseudorasbora parva, Squalidus multimaculatus, Misgurnus mizolepis, Koreocobitis rotundicaudata, Silurus asotus and Odontobutis interrupta) have been introduced since the 1990s.

• Journal of Microbiology and Biotechnology
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• v.15 no.2
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• pp.287-295
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• 2005

In order to compare bacteria] community structure and diversity in activated sludges, terminal restriction fragment length polymorphism (T-RFLP) of PCR-amplified 16s rDNAs was analyzed for 31 domestic and industrial wastewater treatment plants (WTPs). Regardless of the characteristics of the wastewaters, the bacteria] community structures of activated sludges appeared diverse and complex. In particular, activated sludges in domestic WTPs contained higher bacterial diversity than those in industrial WTPs. It was also found that terminal restriction fragment (T-RF) profiles derived from domestic WTPs were very similar with each other, although activated sludges were collected from different plants at different locations. Interestingly, activated sludges of a WTP where restaurant and toilet sewages of a company were managed showed a bacterial community structure similar to that of domestic WTPs. Activated sludges in leather industria] WTPs also showed a high similarity. However, other wastewaters possessed different bacterial communities, so that overall similarity was as low as about $30\%$. Since activated sludges from WTPs for domestic wastewaters and a company sewage appeared to hold similar bacterial communities, it was necessary to confirm if similar wastewaters induce a similar bacterial community. To answer this question, analysis of T-RFs for activated sludges, taken from another 12 domestic WTPs, was conducted by using a 6­FAM$^{TM}$-Iabeled primer and an automated DNA sequencer for higher sensitivity. Among 12 samples, it was again found that T-RF profiles of activated sludges from Yongin, Sungnam, Suwon, and Tancheon domestic WTPs in Kyonggi-do were very similar with each other. On the other hand, T-RF profiles of activated sludges from Shihwa and Ansan WTPs were quite different from each other. It was thought that this deviation was caused by wastewaters, since Ansan and Shihwa WTPs receive both domestic and industrial wastewaters. From these results, it was tentatively concluded that similar bacterial communities might be developed in activated sludges, if WTPs treat similar wastewaters.

• Korean Journal of Health Education and Promotion
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• v.7 no.1
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• pp.33-38
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• 1990

This study was carried out to identify variables related to morbidity perceived by residents who lived in an urban poor community in Seoul city, to analyze correlation between varibles and morbidity, and to find out factors related to the morbidity. Chi-square test, t-test, Pearson's C. C., and factor analysis were employed in this study. The factors labelled by this study are family expenses, housing environment, consumption level, and health care. It may be concluded that a morbidity pattern in specific communicty is strongly associated with socio-economic factors as we observe it at macro level. If the conclusion is acceptable, the health care system should pay attention to reducing the incidence itself through controlling socio-economic aspects of the community and should be reoriented. In this context, the primary health care approach which World Health Organization has advocated can be justified.

• The Journal of Korean Society for School & Community Health Education
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• v.22 no.2
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• pp.105-118
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• 2021

Objectives: This study aimed to examine the effect of Activities Daily Living(ADL)(physical health), depression(mental health), social participation(social health) on suicidal ideation among community dwelling elderly. Methods: Samples were obtained from 184 people aged over 65 years old in one county of Kyungsangbukdo. The survey samples were divided into the presence and absence group of the suicidal ideation. Data were analyzed with x² test, t-test and logistic regression analysis. Results: First, suicidal ideation were significantly different by religion. Secondly, after adjusting for socio-economic variables, logistic regression analysis showed that only depression was associated with higher odds of suicidal ideation Conclusions: It was suggested to develop customized depression and suicide prevention program were required to reduce suicide rate of the elderly.

• Korean Journal of Ecology and Environment
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• v.54 no.4
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• pp.291-302
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• 2021

The phytoplankton community in the estuarine system is affected by changes of physicochemical factors easily. The present study analyzed phytoplankton community distribution and similarity, in addition to exploring factors influencing variations in phytoplankton community structure in three lakes located in the Yeongsan River estuary from March 2014 to November 2017. We carried out non-multidimensional scaling (NMDS) and random forest analysis (RF) for comparing the pattern of phytoplankton distribution and the relationship between phytoplankton distribution and environmental variables. Similarity Percentage (SIMPER) and Analysis of Similarity (ANOSIM) were performed to figure out the similarity of phytoplankton community at each site of three lakes. From NMDS, Phytoplankton community distribution differed between Yeongsan and Gumho lakes, and the factors influencing the distribution of phytoplankton communities across the three lakes were water temperature, dissolved oxygen, total nitrogen (T-N), nitrate-N (NO₃-N), and conductivity. NO₃-N was a key factor influencing phytoplankton community structure in the three lakes based on RF. A total of 24 species were identified as indicator species in the three lakes studied, with the highest species numbers observed in Yeongsan Lake (13) and the lowest observed in Yeongam Lake (2). According to SIMPER and ANOSIM results, the phytoplankton community in Yeongsan and Yeongam lakes were similar, and they differed from those in Gumho Lake. In addition, the phytoplankton community structure varied across the study sites in the three lakes, indicating that water channels across the lakes a minor influence phytoplankton community distribution.

• Research in Community and Public Health Nursing
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• v.31 no.1
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• pp.34-42
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• 2020

Purpose: The objective of this study was to identify whether spirituality mediates the relationship between empathy and elderly care performance among Long Term Care (LTC) hospitals nurses in Korea. Methods: The data collection was performed July 1st to August 31th, 2018. Participants were 119 nurses from three long-term care hospitals in Korea. Self-reported questionnaires were administered to assess general characteristics, empathy, spirituality and elderly care performance. The data were analyzed using descriptive statistics, t-test, one-way ANOVA, Pearson's correlation coefficients, and three-stage simple and multiple regression analysis as proposed by Baron and Kenny. Results: The level of elderly care performance of participants was significantly different based on age (F=3.92, p=.010) and nurse's position (t=-2.18, p=.031). Spirituality had a significant mediating effect on the relationship between empathy and elderly care performance (Z=3.64, p<.001). Conclusion: As spirituality completely mediates the relationship between empathy and elderly care performance, it is necessary to develop a nursing education program that applies spirituality and empathy and supports religious activities at an institutional level.

• Research in Community and Public Health Nursing
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• v.16 no.3
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• pp.241-248
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• 2005

Purpose: This research was carried out to examine if music therapy is effective in decreasing elderly people's depression level and in increasing their life satisfaction level Methods: This study used the quasi-experimental design with nonequivalent control group and the pre-test and post-test design, and was conducted from the 26th of July to the 26th of September in 2004. Data were collected using a questionnaire developed by Y.esavage et al. (1983) to measure depression level and one developed by Yoon (1982) to measure life satisfaction level. The subjects were 80 elderly people who were the members of an elderly welfare center in G city. The subjects were divided into an experimental group (n=40) and a control group (n=40). Results: The first hypothesis 'The depression level will be lowered in the experimental group who received music therapy' was supported (t=3.856, p=.000). The second hypothesis 'The life satisfaction level will be raised in the experimental group who received music therapy' was supported (t=2.040, p=.045). The results above suggest that music therapy can be an effective nursing intervention for reducing the depression level and increasing the life satisfaction level of elderly people.

• Research in Community and Public Health Nursing
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• v.19 no.4
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• pp.696-703
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• 2008

Purpose: To Perform a randomized comparative study investigating the effects of Pelvic Floor Muscle Exercise(PME) and Magnetic Stimulation Therapy(MST) and to identified the problems in each of PME & MST Method: Forty-nine patients with mild stress incontinence were randomly assigned to either of two treatment groups (24 patients in the PME group and 25 in the MST group). The PME group had a video exercising program for 40 times every day during 6 weeks. The MST group was treated with BioCon-2000TM, 2times/ week for six weeks. Pre-test and post-test were performed by Prineometer, 1-hour pad test. and Jackson's BFLUTS questionnaire of Jackson. Collected data were analysed using SAS 9.1 by frequency, Kolmogorov-Smirnov Z. Chi Square-test, t-test, Fisher Exact probability test, Paired t-test, and Wilcoxon's rank sum test. Results: In comparison between before and after PME and MST, statistically significant difference was observed in maximal vaginal pressure, duration of vaginal contraction, amount of urine, and symptom of urination. In the comparison of the effectiveness between PME & MST, only the maximal of vaginal pressure (Z=2.58, p= .010) was significantly different. Conclusion: The factor more effective in the MST group than in the PME group was high compliance.

• Journal of Agricultural Extension & Community Development
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• v.19 no.3
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• pp.581-616
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• 2012

The purpose of this study was to examine the impact of family support and social support on the hopelessness of rural elderly people in an effort to provide some information on the improvement of elderly people's quality of life. The rural elderly people investigated didn't think that they were given lots of support from their families and society, and they didn't feel hopeless a lot, either. The hopelessness of the elderly people was under the negative influence of emotional support and instrumental support among the subfactors of family support, and that was affected in a negative way by affective support among the subfactors of social support. Therefore it could be said that the rural elderly people felt hopeless less when they were provided with more emotional support, more instrumental support and more affective support. Overall, social support had a negative impact on the hopelessness of the rural elderly people. The findings of the study suggest that in order to step up the improvement of rural elderly people's quality of life, a well-functioning model should be developed and applied in collaboration with local community, and the construction of a social support network is required as well.

• Research in Community and Public Health Nursing
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• v.16 no.1
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• pp.49-58
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• 2005

Purpose: The purpose of This pre-post quasi-experimental study was designed to analyze the effects of school based smoking prevention education on knowledge and attitude toward smoking of middle school students. Methods: Data were collected by questionnaires from 320 students of the control group and 244 students of the experimental group in Korea, from June 2 to July 16, 2003. The reliabilities of instruments were adequate (Cronbach's alpha=.75-.92). Data were analyzed by t-test, $x^2-test$ and ANCOVA using SAS V8 program. Results: The results were as follows; 1. The ANCOVA models of the knowledge and attitude toward smoking were very significant to explain about education effects. 2. After the smoking prevention education, the smoking knowledge and attitude of the experimental group was significantly improved, whereas those of control group didn't change significantly. Conclusion: Smoking prevention education for middle school students increased their level of smoking knowledge and attitude. Therefore, it is necessary to give and develop a more effective program which is suitable to the subjects's needs and grades. Furthermore more various teaching methods such as VTR. lectures, role play and long term education program are need to be developed.