• Journal of the Korean Geotechnical Society
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• v.38 no.12
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• pp.7-17
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• 2022

The ratios of water and controlled low-strength materials (CLSM) were selected as 1:0.4, 1:0.6, 1:0.8, 1:1.0, and 1:1.2 to minimize the construction and long-term decrease in uniaxial compressive strength due to dry shrinkage through the combination of water, CLSM, and expansion agent. Approximately 2% and 5% of the expansion agent were added for each blending condition. As a result, it was found that the compressive strength decreased and the expandability increased as the specific gravity of the water increased. In addition, it was confirmed that the compressive strength increased rapidly up to 15 days of age compared to the CLSM used in the field. However, the compressive strength decreased compared to the 15 days of the age as of the 28 days of the age. It showed engineering characteristics similar to CLSM generally used in the field. Therefore, the water and the CLSM were mixed at a ratio of 1:0.8, and the field test was performed by adding 5% of an expansion agent. As a result, 28 days after age, the cavity waveform was observed using the handy GPR exploration system, and it was found that cavity waveform was relaxed or disappeared.

• Journal of the Korean Society of Earth Science Education
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• v.15 no.2
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• pp.285-298
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• 2022

This study is to investigate the effects and characteristics of science and engineering integrated lessons on elementary students' creative engineering problem solving propensity (CEPSP). The science and engineering integrated lessons used in this study was a 10 lesson-hours STEM program, co-developed by University of Minnesota and Purdue University. The program was implemented in the 6th grade science class of H Elementary School located in P Metropolitan city. The main data of this study are the pre-post CEPSP result and interview with 5 students collected before and after the research. The CEPSP result was analyzed by a paired-sample t-test and hierarchical cluster analysis. As a result of the t-test, it was found that overall, the program has a positive effect on the students' CEPSP score. As a result of cluster analysis, it was confirmed that studnets' CEPSP could be classified into two groups (lower and higher score cluster). Five students whose, CEPSP score has significantly improved after the lessons were interviewed to find out what the characteristics of the program that contribute the significant change are. As a result of conducting centroid analysis of the interview transcription and the hybrid analysis method, it was found that the meaningful experiences that the five students commonly shared were 'problem solving through collaboration' and 'through repeated experiments (redesign)', problem solving' and 'utilization of scientific knowledge'. As minor reactions, 'choice of the best experimental method' and 'difference between science and engineering' appeared.

• Journal of the Korean Association of Geographic Information Studies
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• v.26 no.3
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• pp.85-96
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• 2023

This study developed and evaluated a safe route guidance service for electric personal assistive mobility device used mainly by the mobility impaired people to improve their mobility. Thirteen underlying factors affecting the mobility of electric personal assistive mobility device have been derived through a survey with the mobility impaired people and employees in related organizations in Busan Metropolitan City. After assigning safety scores to individual factors and identifying the relevant factors along routes of interest with an object detection AI model, the safe route for electric personal assistive mobility device was provided through an optimal path-finding algorithm. As a result of comparing the general route of T-map and the recommended route of this study for the identical routes, the latter had relatively fewer obstacles and the gentler slope than the former, implicating that the recommended route is safer than the general one. As future works, it is necessary to enhance the function of a route guidance service based on the real-time location of users and to conduct spot investigations to evaluate and verify its social acceptability.

• Clean Technology
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• v.16 no.4
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• pp.258-264
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• 2010

This study estimated the possibility of phosphate removal characteristics to utilize EAF(electric arc furnace) slag as submarine cover material. The major phosphate removal mechanism was a certain formation of HAP precipitation occurred by the ionization reaction between $Ca^{2+}$ and $OH^-$, which were leached from the EAF Slag. Another phosphate removal mechanism was the adsortion of EAF slag surface. As a result of $PO_4{^-}-P$ removal characteristics using continuous column reactor, $PO_4{^-}-P$ concentration decreased rapidly after 3 days and 10 days later, it show under 0.5 ppm. The result as applied in real sea water, shows that the phosphate removal effects were 93~98% by the subaqueous sediment removal using the EAF slag. In conclusion, EAF slag is useful in $PO_4{^-}-P$ removal and control and it is possible to use without additional process like crush and selection.

• Journal of the Korean Association of Geographic Information Studies
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• v.26 no.1
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• pp.132-144
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• 2023

Recently, the frequency and intensity of heat waves due to the increase in climate change temperature are increasing. Therefore, this study tried to compare the evaluation process and evaluation results of the heat wave disaster evaluation, which is the government's analysis of the heat wave disaster vulnerability and the risk evaluation method recently emphasized by the IPCC. The analysis of climate change disaster vulnerability is evaluated based on manuals and guidelines prepared by the government. Risk evaluation can be evaluated as the product of the possibility of a disaster and its impact, and it is evaluated using the Markov chain Monte Carlo simulation based on Bayesian estimation method, which uses prior information to infer posterior probability. As a result of the analysis, the two evaluation results for Busan Metropolitan City differed slightly in the spatial distribution of areas vulnerable to heat waves. In order to properly evaluate disaster vulnerable areas due to climate change, the process and results of climate change disaster vulnerability analysis and risk assessment must be reviewed, and consider each methodology and countermeasures must be prepared.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.7 no.7
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• pp.37-47
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• 2017

The purpose of this study is to investigate how flip learning based interdisciplinary fusion creativity promotion program using movie is effective for university students creativity and fusion talent literacy. To do this, we conducted a total of 15 sessions for a total of 89 students from 44 college students and 45 non - attendance college students who attended the "Creative Fusion Creative Encounters with Film" course at Busan Metropolitan City. The collected data were analyzed by independent sample t-test using SPSS 23.0 program. The results of this study are as follows. First, flip learning based interdisciplinary fusion creativity enhancement program using movie was significant in the order of patience / attachment, humor, self - confidence, imagination, openness, independence, and curiosity in the creativity sub - domain of college students. Second, flip learning - based interdisciplinary convergence creativity enhancement programs using movies were found to have a significant effect in the order of convergence, care, communication, and creativity in the sub - areas of university students' literacy achievement. The findings of the study proved the educational effects of the interdisciplinary creativity promotion program that was based on movie-assisted flipped learning, and this study is expected to suggest some of the right directions for education-based interdisciplinary research and to give some suggestions on that.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.7 no.7
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• pp.69-78
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• 2017

This study researches and analyses the state of the learning achievement assessment of the basic curriculum of the special education in the viewpoint of the individualized education pursuing for the learning and growing of each person, and discusses the political plan for support on the basis of the results. The object of study was 129 special school teachers working in B metropolitan city applying for the basic curriculum. For the measurement, the tool developed by the examination of FGI and the specialist on the basis of test research related to the evaluation tools of the learning achievement assessment for the special education was used. As the result of analysing the real state, to evaluate the individual learning and growing in the aspect of the plan, criteria, period of the evaluation, the special education teachers were approaching in detailed and precise quality, and guiding and using the evaluation results in the various ways in the prospective of the curriculum. The recognition on the sub-element in the each area of the measurement tools showed the difference by gender, age, career, academic achievement, school class, foundation type. On the basis of the results of the real state, as the political support plan, some advice were proposed, which were the expansion of the autonomy of making the curriculum achievement standard and the evaluation system, improving the field and system of the learning achievement assessment, establishing the support system to strengthen the evaluation competences in accord with the teachers' background variables, etc.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.7 no.6
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• pp.63-72
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• 2017

This study made of centrally actual application in general arts classes based on movie in university. Especially, I analyzed the activities of the class with 'Untouchable: 1% friendship' among 6 films. The objects of this study are 44 students of D university in Busan Metropolitan City who take 'creative fusion from movie' general arts class which opened first semester in 2016. In this study, students were able to watch movies through the creative class, which was out of the traditional classroom method, and after 15 hours of learning the quiz online, they conducted 15 weeks as a teaching method to perform tasks, presentations, experiments, and experiences in regular class time. The results of this study are as follows. 'It is a general arts class that makes movements live,' 'It is a general arts class that shows movies from various perspectives,' and 'It is a general arts class that makes me know.' This suggests that the educational medium, which is easily accessible in everyday life, and the general arts class, which is active in the space outside the framework, are perceived as stimulating curiosity and adding fun to college students.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.7 no.9
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• pp.815-823
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• 2017

The purpose of this study is to investigate the need for practical evaluation of special education field based on the analysis of the importance - performance of special education basic curriculum academic achievement evaluation area. The evaluation categories and areas for the analysis of importance and performance are set in 4 categories - 22 areas of life education derived from Delphi analysis and 7 categories- 27 areas in special education basic curriculum. As a result of analyzing the importance and performance of 126 teachers of intellectual disability special schools in P metropolitan city, statistically significant difference was shown between importance and performance in all areas. As a result of analysis of scatter plot with x - axis and significance as y axis based on averaging point, some elements of subject education showed low recognition level both in importance and execution. The results of this study suggest the necessity of restructuring the evaluation area and the evaluation system of the basic education curriculum of the special education and further revise the contents of the curriculum of the national level basic curriculum and the content area, It implies that discussion is needed.

• Journal of Service Research and Studies
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• v.11 no.2
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• pp.106-117
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• 2021

This study is a descriptive survey study using a self-reported survey method to find out the job value and intention of career choice of college students in the medical management field. This study was conducted on university students in medical management at three four-year universities located in Busan Metropolitan City. A total of 139 effective questionnaires were used as statistical analysis data. As a result of the analysis, social dedication and stability were significantly displayed in the selection of jobs for hospital administration and administrative positions, and social dedication and stability were significantly displayed in the selection of jobs as medical recorders. In choosing a career as an international medical tourism coordinator, the focus on human relations, maintaining face, and pursuing stability have been significant. Only social commitment was significantly shown in the choice of occupation as a health educator. A comparison of job values according to general characteristics showed that there was a difference in the pursuit of knowledge and social commitment. In the case of grades, there was a difference in social dedication and stability. There was no significant difference in the case of religious or non-religious matters. In the case of economic level, only economic priorities differed. Through this study, we would like to present basic data so that college students in medical management who prepare to take the first step into a professional medical management society can recognize the need for recognition of job value and move in a better direction in choosing a job.