• KOREAN JOURNAL OF CROP SCIENCE
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• v.24 no.1
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• pp.57-65
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• 1979

In order to find the physiology of responess In order to find the physiology of responses and mechanisms of the actumlation of free proline at low temperatures and water stress. the temperature range, the effect of prolonged exposure to low temperatures, the light-dependence of proline accumulation in barle was significantly lower than in wheat. Proline accumulation at 5\circ C without water stress was shown to be light-dependent. Proline accumulation by water stress was not light-dependent at 2$0^{\circ}C$ but at 5$^{\circ}C$.

• Journal of Korea Water Resources Association
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• v.46 no.10
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• pp.1005-1016
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• 2013

The objective of this study was to evaluate spatio-temporal water shortage distribution in the Sapgyo catchment considering both permitted and non-permitted water rights obtained from the total water right survey conducted in 2010. The results showed that the agricultural water accounted for 98% of the total water uses with 83% being the non-permitted agricultural water uses. During the 11-year (2001~2011) simulation period, water shortage was shown only in the upper Gokgyo stream sub-catchment with the highest water stress from April to May in 2009, particularly because of the large demand for rice cultivation associated with low precipitation. As water shortage was not expected to happen when the permitted water rights were not considered, it was concluded that a proper management of non-permitted water rights would be urgent.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.1
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• pp.157-168
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• 2013

This study is for finding out Career-barrier of the disabled, and for analyzing the effect of Career-barrier on the dysfunctional career-thought. For this study, 180 disabled people were surveyed. The results are as follows; First, the career-barriers that the disabled people perceive are in order; lack of occupational information, lack of social support, low self-concept clarity, low self-efficiency, and conflict with significant-others. Secondly, difference of career-barrier, caused by the traits of the disabled, has influenced the lack of self clarity and occupational information. In addition, among the types of the disabilities, it is proven that the psychological disability highly correlated to the social support, unlikely to gender difference and job experience. Thirdly, the most influential reason on the decision-making confusion for finding job among the sub-variables of dysfunctional career-thought were; low self-concept clarity, conflict with significant-others, and low self-efficiency. While it turned out that the most influential career-barrier on the performance anxiety for disabled people were low self-efficiency and conflict with significant-others.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.92-92
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• 2011

수자원장기종합계획(2006)에 따르면, 우리나라는 물부족이 예상이 되고 있고, 이러한 물부족 현상은 기후변화의 영향으로 더욱 악화될 것으로 예상된다. 기후변화에 따른 물부족에 대응하기 위해서는 현행 지표수 및 지하수(Blue Water) 위주의 수자원관리와 더불어 그전에는 수자원으로 인식되지 않았던 토양수(Green Water)를 새로운 개념의 수자원으로 인식하는 것이 필요하다. 토양수는 현재 물사용량 중에서 가장 많은 비중을 차지하는 농업용수 부분에 효율적으로 활용하면, 지표수나 지하수와 같은 수자원을 대체하는 효과가 있다. 기후변화에 따른 물부족에 대응한 토양수의 효율적 활용을 위해서는, 과거 뿐아니라 미래의 지역별 시기별 토양수 공간분포특성을 분석하는 것이 선행되어야 한다. 그러므로 본 연구에서는 토양수의 분석을 통한 미래 물부족 해결에 도움이 될 새로운 수자원 관리의 기틀을 마련하기 위해 토양수 분포특성분석모델을 개발하고, 이를 활용해 과거 및 미래의 토양수의 공간분포특성을 분석한다. 토양수 분포특성분석모델은 선행 5일간의 일 강우데이터 값을 표준선행강우지표(Normalized Antecedent Precipitation Index)에 적용하여 일 단위 토양수 상태(Wet, Average, Dry condition)를 계산하는 모델이다. 과거 토양수 분석에는 인공위성 강우데이터(Tropical Rainfall Measuring Mission 3B42)를, 미래 토양수 분석을 위해서는 기상청에서 제공하는 국가표준 기후변화 시나리오(A1B)를 각각 사용하여, 과거 데이터는 27km의 격자로, 미래는 25km 격자크기로 한반도 전체의 일 단위 토양수 상태를 계산했다. 계산된 토양수 결과를 활용해 연 월별 그리고 토양수를 쓸 수 있는 시기, 즉 식물이 자라는 시기(4-9월)의 특성을 분석했다. 이를 통해 향후 기후변화에 따른 물부족 대응 토양수 수자원 활용방안에 도움이 될 것으로 예상된다.

• Journal of Convergence for Information Technology
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• v.12 no.4
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• pp.47-55
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• 2022

This study was conducted to identify the correlation between dental hygiene students' overdependence on smartphones, sleep deprivation, and self-control, and factors influencing self-control. 267 college students in the department of dental hygiene located in the Chungcheong area were surveyed and analyzed. Smartphone overdependence was positively correlated with sleep deprivation and smartphone overdependence was negative correlated with self-control. The sleep deprivation was negative correlated with self-control. Factors affected to self-control were problematic results and sleep deprivation. Therefore, it is necessary to develop education and programs that can increase the self-control of dental hygiene students and to prepare measures to prevent sleep problems and overdependence on smartphone.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.81-81
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• 2023

농업용 저수지는 전체 수리답 면적 중 61.3%에 농업용수를 공급하고 있으며, 작물의 수확과 생산성을 위해 안정적인 물 공급이 요구된다. 수자원 분야에서는 물 공급 안정성 정도를 나타내는 지표로 이수안전도를 사용하고 있지만, 농업용 저수지는 기준의 부재로 10년에 1회 정도의 갈수를 기준으로 하는 설계기준인 10년 한발빈도를 대체하여 사용하고 있다. 농업용 저수지의 약 86%가 1940-1970년대에 축조되었으며, 기후변화에 따른 내한능력의 변화, 용수관리 및 수요량의 변화, 설계한발빈도 변화 등으로 현시점의 이수안전도 파악이 필요한 실정이다. 이수안전도는 물 부족량과 물 수요량을 활용한 양적기준 신뢰도와 물 부족 발생기간에 따른 시간기준 신뢰도로 산정하고 있다. 본 연구에서는 평야부 용배수계통을 고려하여 농업용 저수지의 양적 및 시간기준 신뢰도 관련 이수안전도 기준인 이수안전율과 공급신뢰율을 산정하고자 한다. 수요량 산정방법은 물수지 분석 모델인 수리수문설계시스템 (K-HAS, Hydraulics & Hydrology Analysis System)을 활용하여 물 부족량과 물 수요량 및 물 부족 발생기간 자료를 수집하고자 하며, 용배수계통을 고려하기 위해 수로 네트워크 적용 및 수리학적 용수공급 모의가 가능한 EPA-SWMM (United States Environmental Protection Agency Strom Water Management Model)을 통해 평야부 필지마다 물공급 만족정도를 비교하여 필요수량을 산정하고자 한다. 최대 부족량과 수요량으로 산정가능한 양적기준 신뢰도인 이수안전율과 물공급부족기간으로 산정가능한 시간기준 신뢰도인 공급신뢰율을 산정하여 비교하고, 해당 이수안전율과 공급신뢰율을 한발빈도로 환산하여 기존 설계한발빈도와 비교분석 하고자 한다.

• Journal of agricultural medicine and community health
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• v.45 no.2
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• pp.89-99
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• 2020

Objective: This study aimed to report the relationship between walking activity and perceived physical activity barriers after classifying the age group(≤64, 65-74, ≥75). Methods: The subjects were conducted on 1500 residents of two areas, and the walking activity was defined as five or more times a week, 10 minutes or more at a time, and 30 minutes or more per day. Perceived physical activity barriers were lack of time, lack of social support, lack of energy, lack of willpower, and fear of falling. Results: In the group under 64 year, the lack of time (exp(B)=0.819, p=0.002) and the lack of willpower (exp(B)=0.656, p<0.001) were significantly associated. In the 65-74 year old group, the lack of willpower (exp(B)=0.714, p<0.001) and fear of falling (exp(B)=0.787, p=0.003) were a significant association. In the group aged 75 years and over, lack ofwill power (exp(B)=0.734, p<0.001) and fear of falling (exp(B)=0.807, p=0.003) were significantly associated. Conclusion: In order to solve the lack of willpower and lack of time, a walking activity should be performed together at a certain time in the village, and the elderly in the late ages should reduce the fear of falling by performing a fall prevention exercise in parallel.

• Journal of Life Science
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• v.28 no.3
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• pp.376-387
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• 2018

Among a variety of environmental stresses heat, cold, chilling, high salt, drought, and so on exposed to plants, drought stress has been reported as a crucial factor to adversely affect the growth and productivity of plants. Therefore, to understand the mechanism for the drought stress signal transduction pathway in plants is more helpful to develop useful crops that display the enhanced tolerance against drought stress, and to expand crop growing areas. The signal transduction pathway for the drought stress in plants is largely categorized into two types; ABA-dependent pathway and ABA-independent pathway. It has been reported that two transcription factors, AREB/ABF and DREB2, play predominant roles in ABA-dependent and ABA-independent pathways, respectively. In addition to transcriptional regulation mediated by AREB/ABF and DREB2 transcription factors, post-translational modification (such as phosphorylation and ubiquitination) and epigenetic control are importantly involved in the signal transduction for drought stress. In this paper, we review current understanding of signal transduction pathway on drought stress in plants, especially focusing on the biological roles of a variety of signaling components related to drought stress response. Further understanding the mechanism of drought resistance in plants through this review will be useful to establish theoretical basis for developing drought tolerant crops in the future.

• Culinary science and hospitality research
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• v.22 no.4
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• pp.65-80
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• 2016

The objective of this study is to investigate the influence of career barriers on college students majoring in culinary arts on career preparation behavior, and the moderating effect of self-efficacy between career barriers and career preparation behavior. For this purpose, the data was collected through a questionnaire survey from four hundred and eleven students majoring in culinary arts at colleges in South Korea. The data were analyzed by using factor analysis, reliability analysis, multiple regression analysis, and hierarchical analysis with SPSS 18.0. The results are as follows. Among the career barriers, the lack of job information and lack of interest had a significant negative influence on information gathering behavior, although physical inferiority had a significant positive influence on information gathering behavior. The lack of self-concept clarity and lack of job information had a significant negative influence on practical efforts, while conflicts with important others and physical inferiority had a significant positive influence on practical efforts. In addition, the lack of self-concept clarity, lack of job information, and lack of interest had a significant negative influence on tool preparation behavior. Pysical inferiority had a significant positive influence on tool preparation behavior. Self-efficacy showed a partial moderating effect between the lack of job information and tool preparation behavior. Managerial implications and limitations were also discussed.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.40 no.5
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• pp.477-484
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• 2020

Reservoir operation affects the sustainability of a water supply. However, the increase in the temporal and spatial variability of rainfall, attributed to climate change, has led to severe droughts and increased difficulty in maintaining a sustainable discharge at certain locations in a reservoir system operation. In this study, water yield was evaluated using reservoir simulation with varied water supply. Three reservoir system models were simulated for nine reservoirs in the Han River basin. The time-based reliability, volumetric reliability, and resiliency were used to evaluate the results. Each case was simulated by applying firm supply, deficit supply, and deficit supply with historical power release of the Hwacheon Reservoir. As a result of the simulation, all indexes were increased when the deficit supply was applied. In particular, the time-based reliability increased by more than 30%, and the supply reliability increased by about 4%. The result showed that the water supply of the entire water system could be increased when all reservoirs in the water system were operated to supply water and maintain sustainable discharge at the same downstream point. The deficit supply was an efficient reservoir operation method for responding to climate change, especially increased rainfall variability.