• Journal of Korea Water Resources Association
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• v.56 no.6
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• pp.381-392
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• 2023

Precipitation, runoff, and evapotranspiration are changing worldwide due to climate change and human activities. Because watershed runoff is an important component of the hydrological cycle, it is important to investigate the changes in watershed runoff for water resources management. This study collected observed data of runoff, precipitation, temperature, and evapotranspiration in the Geum River basin as well as their synthetic data according to Representative Concentration Pathways (RCP) scenarios, investigated the trend of hydro-meteorological variables using the Mann-Kendall test, and quantitatively evaluated the effects of climate change and human activities on the watershed runoff using the climate elasticity approach and the Budyko framework. The results indicated that the relative contribution of climate change and human activity to changes in runoff varies from region to region. For example, the watershed with the greatest contribution from climate change and human activity were the Yongdam Dam (#3001) basin and the Daecheong Dam (#3008) basin, respectively. Future climate change showed an increase in precipitation and temperature in both RCP 4.5 and 8.5 scenarios, resulting in changes in runoff in the Geum River basin from 44.8% to 65.5%, respectively. We concluded that the effect on watershed runoff can be separated into climate change and human activities, which will be important information in establishing sustainable water resource management plans.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.627-628
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• 2017

Recently, the smart health care industry is showing great interest in health due to the rapid rise of the industry, and various devices capable of monitoring health status in daily life are being developed. In this study, we implemented a system to monitor cardiac activity and anomalous signals from cardiac activity measurement in a manner different from conventional electrocardiogram or pulse wave measurement. And, we performed the measurement evaluation on the subject using the implemented heart sound system. As a result, we confirmed the possibility of monitoring cardiac activity during daily life through heart sound measurement.

• Journal of Digital Convergence
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• v.9 no.2
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• pp.101-110
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• 2011

This study has a blog usage experience with china netizen. We found the impact that blog usage motive, usage type, blog involvement and political-society disposition influence on a moral recognition with a blog activity. Results were as follows: First, A blog usage motive appeared seven, self-expressive and informational search motives were revealed that we had an influence on moral recognition of blog activity. Second, they had the difference in a blog usage motive according to a blog involvement and blog involvement reveled that we had an influence on moral recognition of blog activity. Third, the society involvement disposition of china netizen had an influence on moral recognition of blog activity, it effects on significantly social motivation of blog usage. The implication of this study is a follows. We verified the blog usage motive, type, blog involvement and society involvement disposition are important elements which understand a blog activity. Finally, we confirmed that psychological and social motive related to moral recognition of blog activity.

• Journal of Digital Convergence
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• v.15 no.3
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• pp.365-373
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• 2017

This research aims to verify the moderating effect of sports activity satisfaction in the relationship between adolescents' communication skills and positive self-concept within peer group. To achieve this purpose, this study extracted 250 samples from five boys high schools in Gyeonggi-do, and used survey of 232 students for actual analysis excluding the surveys with unfaithful answer or double entry. Questionnaire was used as a tool for collecting data and conducted frequency analysis, correlation analysis and moderator regression analysis to analyze the collected data. This study drew the following results. It was identified that sub-factors of sports activity satisfaction as social, physical, environmental and educational satisfaction have the moderating effect in the relationship between adolescents' communication skills and social self-concept with peer group. In other words, communication skills within adolescents' peer group play an important role in improving positive self-concept, but when sports activity satisfaction put as a moderating variable, adolescents' positive self-concept would be more improved.

• The KIPS Transactions:PartD
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• v.8D no.1
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• pp.99-104
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• 2001

As a plan to counteract solving software crisis, the technology that is called Component Based Software Engineering (CBSE or Componentware) is introsuced. Component Based Software Developement (CBSD) Processes as one of the technique among CBSE have been proposed. Component specification activities among CBSD Processed are necessary and important for generating feusable component. However, the existing CBSD processed can't ensure the correctness in requirements are reflected. In this paper, we propose that formal activities wgich specify component using formal specification language Z which is verified with the ability of analysis and logicality. The proposed activities are composed of 5 tasks and 12 subtasks. By presenting specific 19 products, it is also proposed that component specification activities which are the base of CBSD for reusing. The proposed activities are able to improve qualities of component through correctness and verification of requirements specification of users in the early step of component-based software process.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2001.11a
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• pp.65-66
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• 2001

교통수단의 발달과 경제활동이 활발해짐에 따라 많은 오염문제가 발생하였는데, 특히 대도시를 중심으로 증가한 차량과 경제활동에 필요한 에너지 소비의 증대로 대기오염의 심각성은 더욱 커지게 되었다. 일반적으로 대기중 부유 분진의 발생원은 토사의 재 비산이나 해염 입자, 화분 등과 같은 자연적인 발생원과 산업시설, 소각시설, 가정난방, 수송수단의 이용 등의 인간활동에 의한 인위적인 배출원으로 대별되는데, 인위적인 배출원의 영향은 자연적 발생원에 비해 그 영향이 보다 폭넓고 중요하게 다루어지고 있다. (중략)

• Information and Communications Magazine
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• v.31 no.12
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• pp.38-43
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• 2014

효과적인 칼로리 소비는 칼로리 균형의 측면에서 매우 중요하다. 활동으로 인해 소비되는 열량은 사람의 일일 총 소비 열량 중 15~30%를 차지하며 사람들은 오직 이 부분만을 조절할 수 있다. 트레드밀 위에서의 활동 강도가 증가 할수록 소비되는 칼로리의 증가 경향은 $y=27.33e^{0.21x}$의 지수함수 형태의 곡선에 피팅됨을 확인할 수 있었다. 또한 인공신경망을 활용한 소모 열량 추정 알고리즘은 전체적 상관관계가 R=0.94로 좋은 결과를 보여주었다.

• The Journal of the Korea Contents Association
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• v.21 no.6
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• pp.94-103
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• 2021

The purpose of this study investigates how game users' evaluation on a game company's CSR activities, perceived quality of game programs, and its brand assets affect the intention to game use. Specifically, this study tries to find out the causal relations among variables as testing the hypotheses. Firstly, the effect of users' evaluation on a game company's CSR activities and its qualities of game programs on the brand assets. Secondly, the effect of users' evaluation on a game company's CSR activities and its qualities of game programs on the intention to game use. Thirdly, the effect of users' evaluation on a game company's CSR activities, the qualities of game programs, and the brand assets on the intention to game use. 367 college students were administrated to the survey. The results indicate that game users' evaluation on economic, ethical, and philanthropic responsibilities, except legal one have an effect on brand assets and intention to game use. Specially, on effects of the three independent variables(CSR activities, perceived quality, and brand assets) toward intention to game use, ethical responsibility and brand loyalty have statistically significant. This result confirms that game company's board of directors should consider ethical company management as well as CSR activities not as cost but as investment for increasing company's business profit.

• Journal of the Korea Convergence Society
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• v.9 no.12
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• pp.411-419
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• 2018

The purpose of this study is to identify the influence of emotion on friend relationship and school life satisfaction of elementary school students attended dance program in school sports club. With questionaires, 350 participants surveyed attended dance program in school sports club. First, the emotion of elementary school students attended dance program in school sports club influenced on friend relationship significantly. Second, the emotion of elementary school students attended dance program in school sports club influenced on school life satisfaction significantly. Third, the friend relationship of elementary school students attended dance program in school sports club influenced on school life satisfaction.

• Journal of Nutrition and Health
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• v.52 no.1
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• pp.36-46
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• 2019

Purpose: This study evaluated amounts of physical activity and sedentary behavior patterns in older adults using an accelerometer and physical activity diary. Methods: Forty-nine older adults (male 26, female 23) participated in this study. They wore a triaxial accelerometer (ActiGraph wGT3X-BT) for one week and wrote a physical activity diary concurrently for three days. Amounts of physical activity, sedentary behavior patterns, and percentage of meeting the World health organization (WHO) physical activity guidelines were analyzed using an accelerometer. In addition, the contents recorded in the physical activity diary were reclassified to 18 levels and the average daily times spent on each level and physical activity level (PAL) were calculated. Results: The subjects were sitting more than half of the day except for bedtime and shower time (59.2%). The numbers of prolonged ${\geq}30$, 40 minutes sedentary bouts were significantly higher in males ($3.10{\pm}1.34$, $1.78{\pm}1.09$, respectively) than in females ($2.34{\pm}1.22$, $1.32{\pm}1.07$, respectively) and the number of breaks per sedentary hour was significantly less in males ($5.74{\pm}0.89$) than in females ($6.44{\pm}0.71$). Among the activities corresponding to sedentary behavior surveyed by the physical activity diary, only the amount of time spent 'resting, speaking and watching TV' showed a significant correlation with the sedentary behavior pattern measured by the accelerometer. The persistence of sedentary behavior was interrupted primarily when low intensity activity was performed. Only 22.4% of the subjects met WHO physical activity guidelines. Conclusion: Based on these results, the physical activity guidelines for older adults should be developed that reflects the appropriate strength, including low activity level and maintenance time of moderate to vigorous physical activity.