• Journal of the Korea Convergence Society
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• v.8 no.5
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• pp.107-115
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• 2017

The purpose of this study was to investigate the factors affecting the creativity of nursing college students who should act as professional nurses in the future. In order to carry out this research, the data collected through structured questionnaires were analyzed for 209 nursing college students who were approved by the IRB of K University. The results of this study showed that the creativity and self-efficacy(r=.374, p<.001), thinking ability(r=.347, p<.001), and school environment perception(r=.246, p<.001) were found to be positively correlated. In addition, the factors influencing the creativity of nursing students were self-efficacy(${\beta}=0.249$, p=.001), thinking ability(${\beta}=0.152$, p=.043), school environment perception(${\beta}=0.188$, p=.005) and the explanatory power of these variables was 21.2%. In the future, it will be necessary to develop educational methods for creativity development of nursing college students.

• Journal of Korean Society on Water Environment
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• v.23 no.2
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• pp.274-280
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• 2007

The photochemical decolorization of Rhodamine B (RhB) in water has been carried out by photo-Fenton process. The effect of applied $H_2O_2$, $Fe^{2+}$ dose, solution pH and UV dose have been studied. The influence of constituent processes of photo-Fenton such as UV, $H_2O_2$ and Fenton has been investigated. Comparison of RhB removal was made between the photo-Fenton and $UV/H_2O_2$ process. The results obtained showed that the optimum dosage of $Fe^{2+}$ and $H_2O_2$ were 0.0031 mmol and 0.625 mol, respectively. pH 3 is found to be the optimum pH of for photo-Fenton process. pH and UV dose strongly influenced the decolorization of RhB in photo-Fenton process. The photo-Fenton and $UV/H_2O_2$ processes showed similar decolorization and seem to be appropriate for the decolorization of dye wastewater.

• Journal of Ecology and Environment
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• v.48 no.2
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• pp.128-136
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• 2024

Background: Prasiola japonica is a freshwater green algae species that can only be seen in Korea and Japan. The various conditions necessary for its growth and reproduction have not been fully elucidated. Therefore, in this study, we aimed to investigate conditions related to the growth and reproduction of P. japonica for the purpose of conserving and producing this species. We first examined differences in growth according to various conditions in different habitats to understand the growth environment of P. japonica. Results: The experimental results revealed that the optimal temperature for growth and reproduction of P. japonica was between 10℃-15℃, and the optimal light intensity was 1,000-1,500 lux. Furthermore, when Provasoli enriched seawater with iodine (PESI) agar was used, the growth of P. japonica was found to be at least 1.5-8 times greater than that of the general Sohan Valley water sample, and it also showed 2-4.5 faster growth rate to reach 30 ㎛. These results emphasize the importance of PESI agar in the culture of P. japonica, and are expected to be helpful in suggesting ways to utilize and conserve P. japonica resources. Conclusions: Through these research findings, we suggest new methods for conserving and producing P. japonica, highlight the importance of preserving the P. japonica ecosystem, and explore ways to utilize P. japonica resources. This research promotes the understanding and protection of P. japonica resources in Korea and beyond, and underscores the need for further research and conservation efforts.

• Journal of Convergence for Information Technology
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• v.7 no.6
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• pp.19-24
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• 2017

The purpose of this study is to investigate the relationship among the Clinical learning environment, clinical practice course satisfaction and the major satisfaction of nursing students. The subjects of this study were included 118 nursing students in one area. Data collection was conducted in September 20 17, and data analysis was descriptive statistics and Pearson's correlation. The results of the study showed that the average of the Clinical learning environment was $3.32{\pm}0.41$, the average clinical practice course satisfaction was $3.88{\pm}0.55$ and the average level of satisfaction was $3.99{\pm}2.30$. Clinical Practice Environment and Clinical Practice Course Satisfaction was (r=.586, p=.000), and the Clinical Practice Course Satisfaction with Major satisfaction was (r=.560, p=.000), Clinical Learning Environment and Major Satisfaction significant positive correlation (r=.530, p=.000). In order to increase resilience, it is necessary to improve the clinical practice environment and the major satisfaction through a detailed study.

• Journal of Korean Clinical Nursing Research
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• v.30 no.2
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• pp.139-146
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• 2024

Purpose: This study aimed to examine the effects of the nursing work environment and self-efficacy on medical safety competence of nurses in general hospital. Methods: Participants included 183 nurses who were recruited through convenience sampling in a general hospital in South Korea. Questionnaires were collected from August 25 to September 22, 2023. The nursing work environment, self-efficacy and medical safety competence scales were used to assess the study variables. The t-test, one-way ANOVA, Scheffé test, Pearson correlation coefficients, and multiple regression tests were performed using IBM SPSS ver. 26.0. Results: Statistically significant correlations were found between nurses' medical safety competence and nursing work environment (r=.34, p<.001), and self-efficacy (r=.48, p<.001). Self-efficacy (β=.38, p<.001), nursing work environment (β=.25, p<.001), and clinical experience (β=.14, p=.043) had the greatest effect on nurses' medical safety competence (F=21.21, p<.001), with an explanatory power of 30.0%. Conclusion: This study confirmed that the nursing work environment and nurses' self-efficacy have a significant impact on nurses' medical safety competence. In order to implement patient safety in hospitals, it is necessary to develop and apply strategies to improve the nursing work environment and increase nurses' self-efficacy to enhance their medical safety capabilities.

• Journal of the Korean Recycled Construction Resources Institute
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• v.11 no.2
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• pp.138-144
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• 2023

In this study, the effect of electrochemical treatment in mitigating alkali leaching into an aquatic environment was investigated. To modify the surface of cement paste, 1000 mA/m² of the direct current was passed through anodic graphite to the external mesh for 4 weeks. Then, the cement paste specimen was exposed to still water in air-tight condition to prevent natural healing of alkali leaching in the water. For 100 days of monitoring in water, the pH value was marginally increased at the electrochemical treatment, while control specimen ranked to the even higher pH accounting for 13.2 in the pH. Moreover, after the pH monitoring, the pH profile for the paste specimen indicated that the electrochemical treatment was effective in securing the higher alkalinity of cement matrix. The water obtained from alkali leaching process, was used to ecological test for Daphnia magna. It was evident that the electrochemical treatment had minimal adverse effect on ecological impact, while control specimen mostly immobilized the standard Daphnia magna.

• Journal of Mushroom
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• v.19 no.1
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• pp.71-75
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• 2021

We analyzed the relationship between the main chemical properties (pH, total nitrogen content, total carbon content, and CN ratio) of sterilized medium and mushroom yields in 1 kg bag culture of Pleurotus ostreatus. The mushroom yields appeared to be highly correlated with the pH, total nitrogen content, and CN ratio, and were the highest under a total nitrogen content of 2.0-2.2% and a the CN ratio of 20-22.5. However, of the three parameters, total nitrogen content showed the highest correlation with the mushroom yield. The coefficient of determination(r2) between the total nitrogen content and the sum of the yield was 0.931, while that of the pH and CN ratio was relatively low. The nitrogen content of the medium was the most important factor in determining the yield of oyster mushrooms.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2003.09a
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• pp.404-408
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• 2003

In this study, we examined the influences of pH and total concentration on the speciation of heavy metals (Cd, Cu, Zn) in acid mine drainage. Their labile concentrations were analyzed by Anodic Stripping Voltammetry (ASV) at both natural pH and adjusted pHs (from 2 to 8). We obtained regression equations for predicting labile concentrations as a function of the water pH and contamination level (total dissolved metal concentration). Our data show that labile Cu depends on both the total concentration and pH, while labile Cd and Zn concentrations are controlled mainly by their total concentration rather than pH. Therefore, the pH variation of AMD may significantly change the toxicity and bioavailability especially of Cu, owing to its speciation change.

• Annual Conference of KIPS
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• 2009.04a
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• pp.750-753
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• 2009

최근 유비쿼터스 및 모바일 환경에서 Peer-to-Peer(P2P)시스템에 대한 연구들이 활발히 진행되고 있다. 모바일 환경에서는 모바일 환경의 제약사항과 함께 이동성이라는 특징이 중요하게 고려된다. 노드의 이동에 의해서 네트워크의 주소가 변경되어 P2P 네트워크 망에서 유효하지 않은 접속 정보들이 생기고 이러한 정보들이 검색 및 P2P 시스템의 전체적인 성능을 떨어뜨리게 된다. 이 논문은 이러한 접속 정보들의 불일치를 해결하여 접속 정보를 유지하기 위한 효과적인 방법론인 이동전파 알고리즘을 제안한다. 이 알고리즘은 접속 정보의 불일치를 해결하기 위해 정보를 빠르게 처리해서 P2P 시스템의 성능을 향상하는 것을 목표로 한다. DHT 기반 P2P 시스템을 기반으로 하여 제안하는 알고리즘을 적용하여 실험을 하였으며, 그 결과로 처음 신규 발견된 정보를 재 발견하는 경우에 성능이 기존의 DHT 기반의 P2P 시스템보다 80% 향상되었음을 알 수 있다.

• Journal of information and communication convergence engineering
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• v.8 no.3
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• pp.295-300
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• 2010

Recent researches of network structure are moving to high-level networks because there are already many research results of low-level network. Especially, current network services has been changed to the multimedia service using multicast routing such as IPTV(Internet Protocol Television) service. And then previous multicast services were provider oriented. So previous multicast structures were organized server/client model. But future multicast services will make user oriented services. Therefore there will be many service providers in the future. At this point, we study P2P network for supporting multi provider. So we research load balancing and contents lookup protocols in P2P network. In this paper, we propose network protocol and system based on super peer P2P for load balancing and efficiently service search. And we considered mobile environment for mobile IPTV.