• Safety and Health at Work
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• 제12권3호
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• pp.346-350
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• 2021

Background: The high sensitivity of individuals toward safety information in production activities, that is, attentional bias toward safety (ABS), can positively predict safe behaviors. It has become a hot topic in current organizational safety behavior research. However, there is no literature on its modification method. Methods: Based on the modified dot-probe task, we designed a modification training method of ABS. The training method required subjects to respond to the location of detection points that presented after safety stimulus and neutral stimulus pictures. Subjects' attentional bias values of safety and neutral pictures were measured during the experiment. Twenty-one students were selected and divided into a control group and training group to gain comparable results. Results: A novel training method was developed in this study to promote the efficacy of safety stimulus by activating ABS of the subjects. Moreover, repeated trainings and preacquired relative knowledge can enhance this effect. Conclusion: This study develops an experimental approach to evaluate the effectiveness of safety education and safety training, and also provides a new research idea for accident prevention.

• 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.

• 한국환경과학회지
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• 제31권6호
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• pp.525-533
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• 2022

Baengnyeongdo, located within the Asian dust stream, is an ideal place to analyze Asian dust moving into the West Sea due to its low emission of artificial pollutants. Baengnyeongdo is being used to analyze the vertical distribution of dust from the lower atmosphere to the upper layer through remote observation. This study compared the ground concentration of dust between Baengnyeongdo and the metropolitan area, estimated the lag time of transport of Asian dust from Baengnyeongdo to the metropolitan area, and examined the homogeneity of upper winds using the rawinsonde method. The results showed that the cross correlation coefficient was higher and the lag time was shorter for each observation station when the distance from Baengnyeongdo was shorter. The upper wind at Baengnyeongdo is dominated by the west/northwest wind. It is the basis for the correlation of dust concentration between Baengnyeongdo and the metropolitan area located to the east. In the future, upper wind data and Asian dust concentration data over the West Sea and Baengnyeongdo are expected to contribute to research related to the movement and prediction of Asian dust and preparation for Asian dust in the metropolitan area.

• 한국지구과학회지
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• 제44권4호
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• pp.275-290
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• 2023

Structural inversion refers to the reverse reactivation of extensional faults that influence basin shortening accommodated by contractional faults or folds. On the Korean peninsula, Miocene inversion structures have been found, but the Cretaceous rocks on Geoje Island may have undergone inversion as early as the Upper Cretaceous. To evaluate the structural inversion on Geoje Island, located on the eastern side of South Korea, and to determine the effects of preexisting weakness zones, field-based geometric and kinematic analyses of faults were performed. The lithology of Geoje Island is dominated by hornfelsified shale, siltstone, and sandstone in the Upper-Cretaceous Seongpori formation. NE and NW-oblique normal faults, conjugate strike-slip (NW-sinistral transpressional and E-W-dextral transtensional) faults, and NE-dextral transpressional faults are the most prominent structural features in Geoje Island. Structural inversion on Geoje Island was evidenced by the sinistral and dextral transpressional reactivation of the NW and NE-trending oblique normal faults respectively, under WNW-ESE/NW-SE compression, which was the orientation of the compressive stress during the Late Cretaceous to Early Cenozoic.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.981-983
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• 2003

The Remote Sensing Group of the Mines and Geosciences Bureau (MGB) has acquired SAR data of the Central Cebu Island for its research study area. The MGB is one of the proponent of DOST-NASA PACRIM II Project, which is composed of eleven (11) agencies and institutions in the Philippines, that focuses on the scientific application of radar data with the theme on hazard and natural resources management. The PACRIM II Project, being done on three-year term, is slated for completion in the year 2004. The main thrust of the project study of the MGB is the baseline environmental monitoring studies, on which the data are to be fused with some other available data from LandSAT and photogrammetry. The generated data is part of the information for the update of thematic mapping being done. The 12 ${\times}$ 60 km swath AirSAR data covers the Central Cebu Island. The highlights of conducting this research project are: Extent of Watershed Basin boundaries - identification of the tributaries that drain water supply to the metropolitan area; Monitoring of the mountain highways - identification of landslide risk prone sites as part of natural hazard monitoring on a national highway that cuts along the mountainous areas; and Coastline change assessment - monitoring the coastline activities relative to the rapid urbanization and exposure as part of coastal management. The Phase 1 of this report discusses the fusion with the ArcView generated data as baseline studies on the monitoring activities.

• 한국환경과학회지
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• 제32권4호
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• pp.267-276
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• 2023

In this study, we analyzed seasonal variations in carbon dioxide fluxes, concentrations, and soil temperatures over three years in unvegetated tidal flats in the Beolgyo area. We also investigated the correlations between carbon dioxide fluxes and influencing factors. The average carbon dioxide flux was positive in summer and autumn but negative in winter and spring. A positive correlation was observed between carbon dioxide flux and soil temperature in spring whereas a negative correlation was noted in summer. In summer and autumn, as the soil temperature increased, the carbon dioxide flux decreased. In contrast, in spring and winter, as the soil temperature decreased, the carbon dioxide flux increased. Overall, this study reveals the significant influence of soil temperatures on carbon dioxide fluxes between the surface layer of the tidal flat and atmosphere.

• 한국환경과학회지
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• 제32권3호
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• pp.181-189
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• 2023

In this study, sediment cores from unvegetated tidal flats in the Hampyeong Bay (west coastal wetland) and Dongdae Bay (south coastal wetland) were sampled, the blue carbon stock in the sediments was calculated, and the characteristics of the blue carbon stock were analyzed based on particle size of the sediments. The sediments in the Hampyeong Bay tidal flat had large particle size and low mud content, and the Dongdae bay tidal flat had small particle size and high mud content. The organic carbon content and blue carbon stock in the sediments were higher in the Dongdae tidal flat than in the Hampyeong Bay tidal flat. As a result of the regression function, in both the Hampyeong Bay and Dongdae Bay tidal flats, the sediments had the smaller particle size and higher mud contents the higher the organic carbon content and blue carbon stock. The sediments with smaller particle size had the larger specific surface area, so were feasible to adsorb and store more organic matters.

• 터널과지하공간
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• 제29권6호
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• pp.468-479
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• 2019

최근 대두되고 있는 지하공간 활용의 필요성 증대에 따라 지하공간의 안정적인 활용을 위해서는 수리-역학적 복합거동에 대한 이해가 필수적이다. 본 연구에서는 향후 국내 다양한 현장 및 지중 조건을 고려한 연구를 수행하는데 도구가 될 수 있는 수치해석을 위한 시뮬레이터를 개발하였다. 이를 위해 지중의 유체역학과 열역학, 역학을 해석하는 과학 소프트웨어 중 하나인 OpenGeoSys와 지반의 여러 역학적 문제들을 해석하는데 전문성을 지닌 FLAC3D를 연계하기로 하였다. 연동해석 기법에 대한 조사를 통해 OpenGeoSys를 주(master)로, FLAC3D를 종속(slave)으로 하여 연계 해석하는 파일 기반의 순차적 연계 방식으로 알고리즘을 개발하였다. 또한, 개발된 시뮬레이터의 검증을 위해 포화된 상태에서의 단상 유체 거동과 관련한 Terzaghi의 압밀 문제를 벤치마크 모델로 선정하여 비교 검증을 수행하였으며, 해석적 해와 수치해석의 결과가 잘 일치하는 것을 확인하였다.

• 자원환경지질
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• 제37권3호
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• pp.365-373
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• 2004

본 연구에서는 신진 고급연구인력의 취업 및 활용 실태를 파악하기 위해 과학재단 인턴연구원 수혜자를 중심으로 지질학을 포함한 지구과학분야의 우리나라 석${\cdot}박사 학위자의 진로추적조사를 수행하였다. 지구환경과학분야의 석${\cdot}박사 학위자로서 과학재단 인턴연구원 수혜자의 미취업율은 32.0%로 조사되었으며, 대학원 진학을 제외한 대학 연구소 산업체로의 정규직 및 임시직 등의 취업은 37.2%에 지나지 않는 것으로 분석되었다. 미국은 국가 인구국 주관으로 미국내 2001년도 박사학위자 진로추적조사를 실시하였으며, 그 결과에 따르면 지구과학 분야 박사학위자 대부분은 취업상태에 있으며, 단지 1.3%만이 미취업상태에서 취업을 희망하고 있는 것으로 분석되었다. 향후 우리나라도 과학재단 또는 관련 학회가 상세한 석${\cdot}박사 학위자 진로조사를 수행하여 지구과학을 비롯한 이공계 신규 석박사 학위자 취업실태를 좀더 자세하게 파악하여야 할 것이며, 이 조사결과는 관계 당국의 지구과학분야의 석 박사 학위자를 위한 고용기회 동향의 파악 및 예측에 활용될 수 있을 것이다.

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2002년도 봄 학술발표대회 발표논문집
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• pp.29-30
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• 2002