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Experiments on the GPR Reposnse of the Organic Hydrocarbons (유류오염물질의 GPR 반응에 대한 모델 실험 연구)

  • 김창렬
    • Economic and Environmental Geology
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    • 제37권2호
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    • pp.185-193
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    • 2004

  • A physical model experiment was conducted using a sand and gravel-filled tank model, to investigate the influence on the GPR response of LNAPL vapor phase effects in the unsaturated zone and of residual phase of LNAPL trapped in the saturated zone. Background measurements of GPR were made with only water in the tank using a fluctuating water table model. Gasoline was, then, injected into the bottom of the model tank to simulate a subsurface discharge from a leaking pipe or tank at depth, obtaining GPR data with rising and lowering of water table. Results from the experiment show the GPR sensitivity to the changes in the moisture content in the vadose zone and its effectiveness for monitoring minor fluctuation of the water table. The results also demonstrate a potential of GPR for monitoring possible vapor phase effects of volatile hydrocarbons in the vadose zone as a function of time, and for detecting the effects of residual phase of hydrocarbons in the water saturated system. In addition, the results provide the basis for a strategy that has the potential to successfully detect and delineate residual LNAPL contamination in the water-saturated system at field sites where the conditions are similar to those simulated in the physcial models described herein.

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The Effects of Experiential Barriers on Absorbing Experience in Adventure Sports - Focusing on the Moderating Effects of Arousal Seeking and Reactance Tendency - (모험 스포츠의 경험 장벽이 모험스포츠 몰입경험에 미치는 영향 - 감각추구성향과 반항성향의 조절효과를 중심으로 -)

  • Jeong, Yun-Hee
    • Management & Information Systems Review
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    • 제34권3호
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    • pp.215-230
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    • 2015

  • This study defined the types of barrier and conducted the impact of barrier in adventurous sports. There are many research on adventurous sports, but these researches have several limitations. First, these studies have overlooked important role of barrier in adventurous sports. Also, previous studies on barriers haven't showed the moderating effects of personality on barriers. So, this study attempts to complement the lack of existing research and this purposes of the study is as follows. First, it is to show the positive impacts of barriers on absorbing experience that had been overlooked in the previous researches. Second, it is to propose the moderating effects of personality-arousal seeking, reactance tendency- on the relationship between barriers and absorbing experience. Survey research is employed to test these hypotheses. Previous researches, such as marketing, adventure sports, hedonic research, have been referenced to measure constructs. We collected data involving various adventure sports, and used 171 respondents to analyze these data using moderating regression. In the final section, we discussed several limitations of our study and suggested directions for future research. We concluded with a discussion of managerial implications, including the potential to advance understanding adventure sports and implying an enhanced ability to satisfy target consumers of it.

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