• Journal of Korean Society of Forest Science
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• v.108 no.4
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• pp.645-654
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• 2019

The purpose of this study was to analyze the current status of and necessity for forest education in Korea in order to promote educational programs on the topic among different age groups. A survey conducted among 1,542 adults nationwide indicated that different age groups had variable degrees of awareness and experience of forest education programs. Specifically, older people responded more positively in terms of awareness, experience, and willingness to engage with forest education programs, and engaging in individual holistic development. In addition, participant companion types and motivation for participating in forest education programs were different among age groups. Regarding motivation for participating in forest education programs, all groups answered, "to enjoy the forest landscape," "to experience new things," and "to refresh themselves." In particular, individuals in their 30s had a desire to learn, while those in their 50s had a desire for a healthy lifestyle. Additionally, people in their 40s showed the highest participation rate in forest education programs, alongside their children and family members. In terms of operating period, older individuals preferred long-term operating programs. Accessibility was the most important factor for all age groups when selecting forest education programs. We hope that this study will be useful for the development and promotion of forest education programs for all age groups.

• Journal of The Korean Society of Agricultural Engineers
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• v.60 no.3
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• pp.135-148
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• 2018

Reservoir sedimentation is a major environmental issue, and various sediment load controls and plans have been proposed to secure clean and safe water resources. The objectives of this study were to estimate soil loss in the upper basins and predict sediment deposition in Ipjang reservoir using hydrologic and hydraulic model. To do so, SWAT (Soil and Water Assessment Tool) and EFDC (Environmental Fluid Dynamics Code) was used to estimate soil loss in two upper basins and to predict spatial distribution and amount of sediment deposition in the Ipjang reservoir, respectively. The hydrologic modeling results showed that annual average soil loss from the upper basins was 500 ton. The hydraulic modeling results demonstrated that sediment particles transported to the reservoir were mostly trapped in the vicinity of the reservoir inlet and then moved toward the bank over time. If long-term water quality monitoring and sediment survey are performed, this study can be used as a tool for predicting the dredging amount, dredging location and proper dredging cycle in the reservoir. The study findings are expected to be used as a basis to establish management solutions for sediment reduction.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.2
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• pp.137-144
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• 2016

The purpose of this study is to investigate the structural relationships among goal orientation, teaching presence, approaches to leaning, satisfaction and academic achievement. For this study, the web survey was administered to 235 learners who participated in distance lifelong education centers of A, B, and C university in South Korea. Structural equation modeling (SEM) analysis was conducted in order to examine the causal relationships among the variables. The results indicated that first, mastery-approach goal and teaching presence had positive effects on deep approach. Second, mastery-approach goal showed negative effects on surface approach, while teaching presence did not. Third, deep approach had positive effects on satisfaction, Fourth, surface approach had negative effects on satisfaction. Fifth, deep approach showed positive effects. Last, surface approach showed negative effects on academic achievement. Based on the result of the research, the study propose the constructive foundation for providing strategies raising the satisfaction and academic achievement in distance life-long education.

• Korean Journal of Environment and Ecology
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• v.30 no.5
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• pp.908-914
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• 2016

Both interests in nature-friendly education and demands for nature experience program are steadily increasing in children education field in korea. This study aims to find out that five-sense experience-activity with healing factors of forest can have an effect on both self-efficacy and respectful recognition of life of children. 5-year-old young children were chosen as the subjects for this study. Test group participated two times a week in the special forest class in a children education institute in Chungju oo-dong while control group did not. Both test group and control group were composed of 20 young children respectively and each group were 11 boys and 9 girls respectively. The five senses experience activity program was conducted two sessions a week from 8 August to 20 September in 2016 and each session was one hour (60 minutes) long. Five senses experience activity is an activity that young children awaken their five senses in the forest, recognize seasonal change with their five senses, build up their selves and become intimate with nature. Before and after the program self- efficacy test and respectful recognition of life test were conducted and the data was analyzed using SPSS 18.0 program. The results indicated that after participating five senses experience activity program both children's self-efficacy which means having positive-thinking and self-confidence and respectful recognition of life which means valuing nature coexisting with nature were improved significantly(p<0.05). Through five senses experience activity young children felt nature freely and to their heart's content with their bodies and five senses experience activity had better positive impacts on children's self- efficacy and respectful recognition of life than classroom activities.

• Journal of information and communication convergence engineering
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• v.16 no.2
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• pp.93-98
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• 2018

The Internet of Things (IoT) is a form of the emerging 4th industry in the 5G era. IoT is expected to develop naturally in our daily life in the 5G era in which high-speed communication will be completed. Along with the rise of IoT, concerns about security and malicious attacks are also increasing. This paper examines DoS attacks, which are one of the representative security threats of IoT and proposes a local detection and blocking system that are suitable for response to such attacks. First, systems of the LoRaWAN type, which are most actively researched in the IoT system field and DoS attacks that can occur in such systems were examined. Then, the inverse order tree algorithm using regional characteristics was designed as a cluster analysis form. Finally, a system capable of defending denial-of-service attacks in the 5G IoT system using local detection and blocking with the Euclidean distance was designed.

• Journal of Agricultural Extension & Community Development
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• v.25 no.4
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• pp.175-184
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• 2018

There are two main types of agricultural extension projects in Korea, the impacts and routes of each type on farm income are different. This paper empirically studies the impact of agricultural extension to farms' income, using Multi-level production function considering time lag. It is found that direct type of extension has positive effect to farms' income. Also indirect type on income is significant only when the level of education is high. Due to the characteristics of Korean agricultural structure, the technical level of farm is greatly influenced by the government's R&D investment and technology guidance. The result implies that indirect type of extension that take into account the educational level of farms should be emphasized for long-term technological advances.

• International Journal of Internet, Broadcasting and Communication
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• v.14 no.3
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• pp.222-229
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• 2022

Through this technology development, companies that operate online shopping malls and prospective startups will support education, consulting and expert group matching so that they can solve various issues that may arise in the course of the entire business life cycle, from startups to closures. It is expected that differentiated consulting programs will be designed for companies that currently operate shopping malls and start ups, and customized consulting programs will be provided to improve the effectiveness of consulting while improving customer satisfaction. It is planning to develop a "successful start-up and operation helper" that helps successful start-ups. It is a system that primarily diagnoses problems of prospective entrepreneurs and operators through an automation system at the start-up and operation stage, and professional consultants participate to derive and solve problems, and takes care of all stages of shopping mall birth and growth. In this paper Metaverse based shopping mall Creation is also discussed. Through Big Data creation these accumulated data, we intend to help operators start and operate shopping malls through accurate information by managing all knowledge of shopping malls as a system in the long run.

• Journal of Yeungnam Medical Science
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• v.40 no.2
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• pp.123-135
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• 2023

Advances in perinatal and pediatric intensive care and recent advances in mechanical ventilation during the last two decades have resulted in an exponential increase in the number of children undergoing home mechanical ventilation (HMV) treatment. Although its efficacy in chronic respiratory failure is well established, HMV in children is more complex than that in adults, and there are more considerations. This review outlines clinical considerations for HMV in children. The goal of HMV in children is not only to correct alveolar hypoventilation but also to maximize development as much as possible. The modes of ventilation and ventilator settings, including ventilation masks, tubing, circuits, humidification, and ventilator parameters, should be tailored to the patient's individual characteristics. To ensure effective HMV, education for the parent and caregiver is important. HMV continues to change the scope of treatment for chronic respiratory failure in children in that it decreases respiratory morbidity and prolongs life spans. Further studies on this topic with larger scale and systemic approach are required to ensure the better outcomes in this population.

• Korean Journal of Applied Biomechanics
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• v.20 no.3
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• pp.253-259
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• 2010

The aim of IAAF's Biomechanics project, initially launched at the 1987 World Championships in Rome, is to support athletes and coaches in the optimization and improvement of their training and competition performance. The IAF and the IAAF supports biomechanical projects, as a service to their Member Federations, starting from the IAAF World Championships in Rome 1987. In 1997, at the IAAF World Championships of Athens. In 1995, at the IAAF World Championships in Goteborg and in co-operation with the Swedish Sport Institute of Karlstad and under the leadership of Anders Bergstrom a biomechanical research on "Throws" was conducted. In 2005, at the IAAF World Championships in Helsinki on 100m - Pole vault, High Jump, Triple Jump, Javelin, under the leadership of Prof. Paavo Komi. The IAAF published the final report in 2008 with a supplement of NSA. In 2007, at the IAAF World Championships of Osaka, in co-operation with Osaka University of Health and Sport Sciences and under the leadership of Prof. Michiyoshi Ae the IAAF received a final report on; short sprint, distance running, high jump, long jump, shot put and javelin. In 2009, at the IAAF World Championships of Berlin, in co-operation with the DLV and the leadership of Helmar Hommel (GER). The purpose of this study is to draw up a plan to perform an effective biomechanics project at 2011 IAAF World championship in Daegu.

• Journal of Life Science
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• v.18 no.8
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• pp.1154-1158
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• 2008

The purpose of this study was to analyze the effect of body composition, leptin, total cholesterol and BMD on a long-term exercise paticipation in middle-aged women. Twentieth subjects were divided into three groups, obesity group, over-fat group and normal group. These data were analyzed by One-way ANOVA and Corelation Analysis. Obesity group was higher than over-fat group in body fat volume (p<.001). Obesity group was higher than other groups in BMI (p<0.05). Normal group was higher than obesity group in radius BMD (p<0.01). Body fat was positively correlated with BMI (Rsq=0.8411) and radius BMD (Rsq=0.6736). but, BMI was negatively correlated with tibia BMD (Rsq=0.6714).