• 한국환경과학회지
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• 제30권7호
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• pp.519-527
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• 2021

Moving average precipitation provides periodic precipitation patterns by solving precipitation irregularities. However, due to uncertain moving average periods, excessive data smoothing occurs, which limit the possibility to analyze groundwater levels in the short term. Nonetheless, groundwater level fluctuation can compensate these limitations as it can calculate appropriately for unit time and verify the effect of precipitation penetrated into groundwater in a short time period. In this study, the characteristics of groundwater level were evaluated using groundwater level fluctuation to compensate for limitations of groundwater level analysis using moving average precipitation. In addition, the groundwater quality was investigated using the electrical conductivity fluctuation. The study site was Hyogyo-ri, Yesan-si, Chungcheongnam-do. Four observation wells and an automated weather system were used. The correlation between groundwater level fluctuation and precipitation (Case 1) and the correlation between groundwater level and moving average precipitation (Case 3) were compared. In the analysis for 1 hour data, the correlation coefficient of Case 1 was higher than that of Case 3, and in the analysis for 1 day data, the correlation coefficient of Case 3 was higher than that of Case 1.

• 한국생활과학회지
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• 제20권1호
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• pp.225-241
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• 2011

The purposes of this study were to determine the actual state of the indoor environment, and to analyze the relationship between the architectural or living factors and indoor physical elements in the elderly hall at apartment complexes during winter. The field surveys consisted of measurements of the physical elements, observations of living factors, and interviews with users. The field surveys were carried out at 5 halls in February 2009. The measured elements were air temperature, relative humidity, $CO_2$, CO, PM10, TVOC, HCHO, and illumination. The results showed that the averages of indoor temperature for the hall was between $22.7{\sim}25.1^{\circ}C$, relative humidity was 22.0~48.2%, $CO_2$ level was 892.4~2066.7ppm, CO level were 0~0.4ppm, PM10 level were $22.3{\sim}31.4{\mu}g/m^3$, HCHO level was 0.00~0.24ppm, and illumination level was 94~391.6lux. TVOC level was detected at 0.00~0.54ppm in only one hall. The average clothing amount of the users was 1.18clo and activity was 0.7~1.6met. It was evaluated to be a comfortable state at indoor temperature, CO level, PM10 level, and TVOC level, but an uncomfortable state at relative humidity, $CO_2$ level, HCHO level, and illumination level. The main reason seemed to be lack of ventilation.

• Journal of Information Technology Applications and Management
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• 제18권4호
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• pp.149-168
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• 2011

The current study initiated from an action-plan level perspective of revitalizing Green IT (Information Technology) in Korea by building a standardized national Green IT brand. In order to setting up a national level brand, there should be a big quantitative survey for identifying Green IT brand concepts. For this, the current study provides exploratory research results based on preliminary interviews and literature survey before the quantitative survey. The present article suggests a research framework and describes important factors for setting up a national level Green IT brand. In-depth interviews with panels were executed and existing Green IT brands in other countries are summarized and asked for evaluation to a small number of panels. The research results show that (1) National level Green IT brand should include wider concepts of IT, (2) Green IT brand will be more appealed by the public when it is simple, straightforward, and intuitive, (3) Earth, Tree, and/or Water show higher correlation with Green IT concepts. Green IT brand will offer marketing promotion effects to companies who adopt national level Green IT brand as well as increase public use of Green IT in daily life. For this reason, Green IT brand will be a win-win strategy and this should be cared and executed by the related government agencies with long term perspective.

• 한국멀티미디어학회논문지
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• 제21권12호
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• pp.1431-1438
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• 2018

In this paper, we proposed a river water level detection and tracking of the river or dams based on image processing system. In past, most of the water level detection system used various water sensors. Those water sensors works perfectly but have many drawbacks such as high cost and harsh weather. Water level monitoring system helps in forecasting early river disasters and maintenance of the water body area. However, the early river disaster warning system introduces many conflicting requirements. Surveillance camera based water level detection system depends on either the area of interest from the water body or on optical flow algorithm. This proposed system is focused on water scaling area of a river or dam to detect water level. After the detection of scale area from water body, the proposed algorithm will immediately focus on the digits available on that area. Using the numbers on the scale, water level of the river is predicted. This proposed system is successfully tested on different water bodies to detect the water level area and predicted the water level.

• 한국환경과학회지
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• 제25권1호
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• pp.135-146
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• 2016

This study analyzed fluctuations of ground water level of ground water wells developed in Seongsan watershed of Jeju Island until 2013 using MODFLOW, a numerical analysis model. Ground water level shows greater fluctuations from increase of pump capacity compared to the number of ground water wells. The development of ground water at the top of watershed was found to have direct influence on ground water level. Ground water wells developed until 2013 were used to continue pumping for 50 days, and ground water level of coastal region was reduced below 50% compared to the standard water level. In addition, the range of fluctuation of water level was large in the east coast region, which represents the direction of flow of ground water.

• 한국콘텐츠학회논문지
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• 제14권10호
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• pp.810-817
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• 2014

본 연구의 목적은 영아교사의 표준보육과정의 실행 수준과 장애 요인을 분석하고, 두 요인간의 관계성을 살펴보는 것이다. 연구대상은 전라남도의 어린이집에 근무하는 204명의 영아교사이며, 연구도구는 선행연구를 참고하여 연구목적에 적절하게 제작한 질문지를 사용하였다. 질문지는 2013년 5월 6일부터 6월 13일까지 배포 수거되었다. 수집된 자료는 SPSS 18.0 프로그램을 사용하여 빈도분석, 기술통계, 일원변량분석, Pearson 상관분석을 실시하였다. 연구결과를 제시하면 다음과 같다. 첫째, 영아교사의 표준보육과정의 실행 정도는 "비교적 높은 수준" 으로 나타났다. 영아교사의 근무기관 유형, 학력, 경력에 따라 표준보육과정의 실행 수준에서 통계적으로 유의미한 차이가 없었다. 둘째, 영아교사의 표준보육과정 운영의 장애 요인은 "보통 정도" 인 것으로 나타났다. 영아교사의 근무기관 유형, 학력, 경력에 따라 표준보육과정 운영의 장애 요인에서 통계적으로 유의미한 차이가 없었다. 셋째, 영아교사의 표준보육과정 운영의 실행 수준과 장애 요인간에는 부적인 관련성이 있었다.

• 한국환경성돌연변이발암원학회:학술대회논문집
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• 한국환경성돌연변이발암원학회 2004년도 KSOT/KEMS Fall Annual Meeting
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• pp.166-166
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• 2004

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제26권1호
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• pp.29-50
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• 2012

이 연구의 목적은 우수학력 학생들과 기초학력 미달 학생들의 수학과 학업성취도를 비교하는 데 있다. 이러한 연구 목적을 수행하기 위해 이 연구에서는 학교급별로 우수학력과 기초학력 미달 학생들의 비율, 우수학력과 기초학력 미달 학생들의 전체, 내용 영역별, 행동 영역별 수학 학업성취도를 비교하였다. 이를 통해 우수학력과 기초학력 미달 학생들의 변화 추이를 파악할 수 있을 뿐만 아니라 내용 영역별, 행동 영역별, 문항 유형별(서답형 문항)로 우수학력과 기초학력 미달 학생들의 특성을 파악할 수 있었다.

• 대기
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• 제29권4호
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• pp.367-380
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• 2019

Global warming causes various problems such as the increase of the sea surface temperature, the change of coastlines, ocean acidification and sea level rise. Sea level rise is an especially critical threat to coastal regions where massive population and infrastructure reside. Sea level change is affected by thermal expansion and mass increase. This study projected future sea level changes in the 21st century using the HadGEM2-AO with RCP8.5 scenario. In particular, sea level change due to water mass input from ice-sheets and glaciers melting is studied. Sea level based on surface mass balance of Greenland ice-sheet and Antarctica ice-sheet rose 0.045 m and -0.053 m over the period 1986~2005 to 2081~2100. During the same period, sea level owing to dynamical change on Greenland ice-sheet and Antarctica ice-sheet rose 0.055 m and 0.03 m, respectively. Additionally, glaciers melting results in 0.145 m sea level rise. Although most of the projected sea level changes from HadGEM2-AO are slightly smaller than those from 21 ensemble data of CMIP5, both results are significantly consistent each other within 90% uncertainty range of CMIP5.

• 기술혁신학회지
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• 제10권1호
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• pp.143-164
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• 2007

본 연구는 구가차원의 국가기술로드맵 활용도와 개선사항에 영항을 미치는 요인들에 대해 실증 분석함으로써 향후 국가기술로드맵의 활용도 제고와 발전방향을 제시하고자 한다. 국가수준 기술로드맵의 작성과 활용이 증가함에도 불구하고 실제 과학기술 전문가들의 활용도 현황이나 개선사항에 대한 체계적인 조사분석은 상대적으로 미흡하였다. 본 연구는 국내 320명의 과학기술 분야 전문가를 대상으로 수행한 설문조사를 바탕으로 국가수준 기술로드맵의 활용도와 개선방향에 대해 분석하였다. 분석결과, 국가기술로드맵 활용도에는 전반적인 기술수준이 높고 기술로드맵 참여 경험은 활용도에 유의한 영향을 미쳤다. 또한 중장기 기술전략의 세부목적에 따라 활용도에 차이가 있는 것으로 나타났다. 반면, 국가차원의 기술로드맵은 크게 기획과정, 작성과정, 결과활용에서 개선이 요구되며, 기술수준 참여경험 및 중장기 기술전략의 세부목적에 따라 서로 다른 측면에서의 향후 개선사항을 요구하고 있는 것으로 나타났다. 마지막으로 본 연구의 의의와 향후 국가차원의 국가기술로드맵의 활용도 제고와 발전방향을 위한 방안을 제시하였다.