• Journal of Fisheries and Marine Sciences Education
• /
• v.28 no.4
• /
• pp.1171-1181
• /
• 2016

The purpose of this study was to verify the formation of satisfaction and dissatisfaction of water leisure tourism participants in Busan area using qualitative study method approach. Research participants were selected 6 water leisure tourism participants by reputational sampling method. Six participants who usually participated in water leisure tourism were selected as research participants. The data for this study included participants' observation and in-depth interview. This study categorized the coding paradigm which was presented by using the findings derived from water leisure tourism background. The results based on in-depth interview were as follows. First, water leisure tourism participants recognized environmental satisfaction of environmentally safe pleasure. Second, water leisure tourism participants recognized social satisfaction of change for leisure recognition. Third, water leisure tourism participants recognized facilities and program satisfaction of clearness and systematic programs. Fourth, water leisure tourism participants recognized instructor satisfaction of kindness and professional. Fifth, water leisure tourism participants recognized safety dissatisfaction of safety ignorance. Sixth, water leisure tourism participants recognized amenities dissatisfaction of lacking convenience. Seventh, water leisure tourism participants recognized accessibility dissatisfaction of public transportations.

• Korean Journal of Environmental Agriculture
• /
• v.34 no.2
• /
• pp.134-138
• /
• 2015

BACKGROUND: In recent years, several researchers have focused on odour control methods to remove the harmful chemicals from chemical accidents and incidents. The present work deals with the system development of the hazardous. METHODS AND RESULTS: For on-site removal of hazardous gaseous materials from chemical accidents, mobile vortex wet scrubber was designed with water vortex process to absorb the gas into the water. The efficiency of the mobile vortex wet scrubber was evaluated using water spray and 25% ammonia solution. The inlet air velocity (gas flow rate) was according to the damper angle installed within the hood and with increase of gas flow rate, consequently the absorption efficiency was markedly decreased. In particular, when 25% ammonia solution was exposed to the hood inlet for 30 min, the water pH within the scrubber was changed from 7 to 12. Interestingly, although the removal efficiency of ammonia gas exhibited approximately 80% for 5 min, its efficiency in 10 min showed the greatest decrease with 18%. Therefore, our results suggest that the ammonia gas may be absorbed with the driving force of scrubbing water in water vortex process of this scrubber. CONCLUSION: When chemical accidents are occurred, the designed compact scrubber may be utilized as effective tool regarding removal of ammonia gas and other volatile organic compounds in the scene of an accident.

• Journal of the Korean Society of Safety
• /
• v.37 no.4
• /
• pp.11-19
• /
• 2022

This paper presents the effects of high temperature and water absorption on the mechanical behaviors of carbon-aramid fiber composites, specifically their strength, elastic modulus, and fracture. These composites are used in industrial structures because of their high specific strength and toughness. Carbon fiber composites are vulnerable to the impact force of external objects despite their excellent properties. Aramid fibers have high elongation and impact absorption capabilities. Accordingly, a hybrid composite with the complementary properties and capabilities of carbon and aramid fibers is fabricated. However, the exposure of aramid fiber to water or heat typically deteriorates its mechanical properties. In view of this, tensile and flexural tests were conducted on a twill woven carbon-aramid fiber hybrid composite to investigate the effects of high temperature and water absorption. Moreover, a multiscale analysis of the stress behavior of the composite's microstructure was implemented. The results show that the elastic modulus of composites subjected to high temperature and water absorption treatments decreased by approximately 22% and 34%, respectively, compared with that of the composite under normal conditions. The crack behavior of the composites was well identified under the specimen conditions.

• Journal of Digital Convergence
• /
• v.12 no.5
• /
• pp.415-423
• /
• 2014

The purpose of this study is preparing for the expansion of water leisure sports in accordance with the marina port building project, enforcement of Reservoir Development Special Act and the revision of Water Leisure Sports Safety Act by government. For the purpose, this study investigated the status of physical education class as a cultural study in universities, collected/analyzed the related literatures to analyze the role of physical education class and analyzed the curriculum of university physical education as a cultural study being taught at 17 national and public universities in nationwide 12 areas. The university physical education as a cultural study should be given as a preparation for future water leisure sports age so that it can achieve its inherent purpose of fostering sports demonstrating ability as a lifetime sports. By doing such, people will have better life while enjoying water leisure sports.

• Journal of Science Education
• /
• v.32 no.1
• /
• pp.73-84
• /
• 2008

The purpose of this study was to elucidate the perception of drinking water and water environment held by housewives in Gumi city area. The subject of this study were 20 housewives and surveyed with a questionnaire on a self-reporting basis. Results are as follows: 1. Housewives were concerned about drinking water and water environment as natural resource affecting Gumi city area. The percentage og the housewives who had used the purified tap water and the boiled water as drinking water was 35% and 30%, respectively. Also, The percentage of the safety of tap water was 75%. However, their perceived level about the safety of drinking water was relatively low. 2. Housewives suggests that a drinking water conservation campaign and active participation may be more effective if it is linked to local community. Furthermore, continuous education about drinking water and water environment promoting perception of tap water as drinking water.

• Journal of Microbiology and Biotechnology
• /
• v.31 no.9
• /
• pp.1311-1322
• /
• 2021

Microbially induced calcium carbonate precipitation (MICP) has recently become an intelligent and environmentally friendly method for repairing cracks in concrete. To improve on this ability of microbial materials concrete repair, we applied random mutagenesis and optimization of mineralization conditions to improve the quantity and crystal form of microbially precipitated calcium carbonate. Sporosarcina pasteurii ATCC 11859 was used as the starting strain to obtain the mutant with high urease activity by atmospheric and room temperature plasma (ARTP) mutagenesis. Next, we investigated the optimal biomineralization conditions and precipitation crystal form using Plackett-Burman experimental design and response surface methodology (RSM). Biomineralization with 0.73 mol/l calcium chloride, 45 g/l urea, reaction temperature of 45℃, and reaction time of 22 h, significantly increased the amount of precipitated calcium carbonate, which was deposited in the form of calcite crystals. Finally, the repair of concrete using the optimized biomineralization process was evaluated. A comparison of water absorption and adhesion of concrete specimens before and after repairs showed that concrete cracks and surface defects could be efficiently repaired. This study provides a new method to engineer biocementing material for concrete repair.

• Child Health Nursing Research
• /
• v.8 no.4
• /
• pp.365-380
• /
• 2002

This study was to develop and evaluate injury prevention education proposal which will helpful and can be utilized directly on the first line spot for elementary school children. Education proposal development and evaluation process was 1) Construction of 10-times education proposal contents proper to schooler 2) Testify validity through 3 pediatric nursing professor and 4 elementary school nurse 3) Pretest was done from March, 2002 to July on 3-6th grade 313 elementary school students 4) Through correction and revision after pretest evaluation meeting, final injury prevention education proposal was developed 5) After 10-times injury education, evaluation was carried out about the degree of help in education contents and general constitution of injury education to total subjects of educated children. Injury prevention education proposal consists of 10 times and each subjects are followings. 1st is 「introduction of injury prevention education and the importance of injury prevention」 2nd is「safety in and around home」, 3rd is 「injury prevention in school」, 4th is 「prevention of violence」, 5th is 「motor vehicle safety」, 6th is 「water safety」, 7th is 「prevention of fire and burns」, 8th is 「toy and product safety」, 9th is 「sports and recretional activities safety」and the final 10th is 「injury prevention caused by animals」. In the evaluation, the degree of help in education contents showed it helped to children averaged 1.66 and general constitution showed averaged 2.17 that children satisfied about developed injury prevention proposal. This study expected to provide systematic and concrete guidance in injury prevention education for elementary school children.

• Journal of Digital Contents Society
• /
• v.17 no.6
• /
• pp.489-497
• /
• 2016

This study focused on the focus group interview based on the questionnaire. Prior to the interview, we used questionnaires from the previous researchers in order to select the questionnaires and interviews of the focus group. In order to measure the possibility, which is the expression characteristic of the safety education app, the items related to cognitive, sensual, physical, and safety behaviors were used as constituent factors. And the safety education app to analyze was selected 'Water Go GO!' App developed by the National Emergency Management Agency. The results of this study are as follows: First, the learner should help to participate in learning continuously in order to make meaningful learning activities in safety education app learning environment. Second, learners must interact with mobile devices in their apps to facilitate learning while reducing the number of factors that can interfere with learners' learning. This study is meaningful in that it can utilize this design principle as a guideline for enhancing safety behaviors.

• Journal of Korean society of Dental Hygiene
• /
• v.12 no.5
• /
• pp.999-1006
• /
• 2012

Objectives : The purpose of this study was to understand and compare the knowledge of the adolescents and adults among the residents of Seoul metropolitan city about water fluoridation program. Methods : A total of 613 adolescents and adults between the age of 15 and 31-49 was surveyed by the questionnaire. Among them, the source of drinking water, the source of cooking water, awareness of caries prevention effect of water fluoridation program, awareness of cost benefit of health insurance of water fluoridation program, approval of water fluoridation program, awareness of health safety of water fluoridation program were surveyed. Results : 85.5% of adolescents and 88.9% of adults were surveyed to use public water supply for drinking water, and 95.3% of adolescents and 96.8% of adults were surveyed to use public water supply for cooking water. But only 14.0% of adolescents, comparing to the 42.1% of adults, were surveyed to be aware of the caries prevention effect of water fluoridation, and only 6.0% of adolescents, comparing to the 24.6% of adults, were surveyed to be aware of the caries prevention effect of water fluoridation to reduce to health insurance expenditure. About 82.6% of adolescents, comparing to the 92.1% of adults, were surveyed to vote for the fluoridation program, and only 6.8% of adolescents, comparing to the 28.6% of adults, were surveyed to be aware of health safety of water fluoridation program. Conclusions : Extensive oral health education program to the adolescents are necessary about using water fluoridation to prevent the dental caries.

• Journal of Digital Convergence
• /
• v.19 no.3
• /
• pp.437-444
• /
• 2021

The purpose of this study is to investigate the relationship between consciousness of marine safety, re-participation behavior of marine safety virtual reality experience education. For the study, participants in marine safety virtual reality experience education were surveyed from July to August 2020. Specifically, all participants were NakDanbo Water leisure center and Song-do Marine leisure center. A total of 300 participants were sampled using convenience sampling method, but 253 were finally used in the data analysis excepting incomplete or faithless questionnaires. the data analysis was conducted through frequency analysis, Cronbach's alpha, Exploratory Factor Analysis (EFA), correlation analysis, simple and Multiple regression analysis using SPSS 20.0. The results are as follows. Firstly, participants in marine safety virtual reality experience education positive impact on had a significant effect on consciousness of marine safety. Secondly, participants in marine safety virtual reality experience education positive impact on had a significant effect on re-participation behavior intention. Lastly, consciousness of marine safety had positive effects on re-participation behavior intention.