• Title/Summary/Keyword: environmental movement

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Lateral Movement of Quaywall on Soft Grounds (연약지반에 설치된 안벽구조물의 측방이동 평가)

  • Hong, Won-Pyo;Lee, Kwang-Wu;Cho, Sam-Deok
    • Journal of the Korean Geotechnical Society
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    • v.24 no.11
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    • pp.5-16
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    • 2008
  • Field monitoring data of nine sites were investigated to suggest an evaluation method on lateral movement of the quaywall on soft grounds. It was found that in order to evaluate the lateral movement of quaywalls with foundation piles such as the landing pier, the safety factor of slope should be applied with consideration of the stabilizing effect of the piles. If the required safety factor of slope is greater than 1.6 in slope stability analysis with consideration of the stabilizing effect of the piles, the quaywalls are considered to be safe against lateral movement. On the other hand, for the gravity-type quaywalls such as the caisson type quaywall, the required safety factor of slope should be greater than 1.3.

LAXATIVE AND SPASMOGENIC ACTIVITIES OF A HERBAL FORMULA

  • Ryu, Seung-Duk;Park, Chang-Shin;Hwang, Sung-Yeoun;Chung, Woon-Gye
    • Proceedings of the Korean Society of Toxicology Conference
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    • 2002.05a
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    • pp.116-116
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    • 2002
  • The spasmogenic activities and acute toxicity study of Yumijangquebo (YMJQB), a Korean herbal laxative formulation, were subjected to pharmacological evaluation. When tested in the contractile extent of guinea pig ileum, YMJQB displayed a spasmogenic effects in a concentration up to 0.05mg/ml and then decreased contractility of ileum; exhibiting the similar pattern with acetylcholine, a physiological regulator for peristaltic movement of the gut.(omitted)

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Analysis of stream-aquifer using nonlinear Boussinesq equation (비선형 Boussinesq방정식을 이용한 유로대수층 해석)

  • 정재성;김민환;방경미
    • Journal of Environmental Science International
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    • v.11 no.1
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    • pp.57-61
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    • 2002
  • To investigate the flow characteristics by the water stage variation between stream-aquifer, the new solution of nonlinear Boussinesq equation was derived and extended using the Boltzmann transformation. The soundness of the analytic solution obtained from this study was examined by the comparison with the linearized analytic solution and the numerical solution by finite difference method. And the movement, velocity, flowrate and volume of flow caused by the stage variation of stream and the existence of regional gradient were estimated. This new analytic solution can express the groundwater movement between stream-aquifer. So, it might be helpful to manage water environment.

Geological Structures of the Taebaek-Hajang Area, Samcheog Coalfield, Korea (삼척탄전(三陟炭田) 태백(太白)-하장지역(下長地域)의 지질구조(地質構造))

  • Kim, Jeong Hwan;Kim, Young Seok
    • Economic and Environmental Geology
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    • v.24 no.1
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    • pp.27-41
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    • 1991
  • Taebaeg-Hajang area, in the northern part of Taebaeg city, comprises of Paleozoic sedimentary sequences and Cretaceous intrusive and volcanoclastic rocks. The rocks in the area are affected by folding and thrusting during the Bulgugsa Orogeny. In Taebaeg area, geologic structures related with thrust movement are dominant. These structures are small scale of klippe and window, back thrust, and asymmetric folds related with blind thrust. Tear fault or compartment fault due to differential movement of thrust sheets have "en echelon" arrays. Small scale transpression effects occurred along these faults and produced the flower structure. According to strain measurement using by ooids from limestone and quartz grains from quartzite, strain ratios are very low and strain ellipsoids are apparent oblate type.

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Toxicity of Phenols to the Nematode Caenorhabditis elegans (Caenorhabditis elegans를 이용한 phenol류의 독성 연구)

  • Jung Kang-Sik;Hyun Sun-Hee;Choung Se-Young
    • Environmental Analysis Health and Toxicology
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    • v.21 no.3 s.54
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    • pp.239-244
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    • 2006
  • Caenorhabditis elegans(C. elegans) is a free-living soil nematode that commonly used as a biological model and recently, much work has been done using C. elegans as a toxicity model. To evaluate the acute toxicity of phenols to C. elegans, worms were subsequently exposed to nine different xenobiotics. This study described lethal toxicity, reproductive toxicity and movement inhibition using 2-propylphenol, 4-propylphenol, 2-tert-butylphenol, 3-tert-butylphenol, 4-tert-butylphenol, 2-phenylphenol, 4-phenylphenol, nonylphenol and 4-dodecylphenol to C. elegans for 24 hr or 72 hr. We found that phenols used in this study were very toxic to C. elegans. The order of lethal toxicity, reproductive toxicity and movement inhibition is as follows. 4-propylphenol > 2-phenylphenol > 2-tert-butylphenol > 2-propylphenol > nonylphenol > B-tert-butylphenol > 4-dodefylphenol > 4-tert-butylphenol > 4-phenylphenol.

Mathematical Evaluation of Response Behaviors of Indicator Organisms to Toxic Materials (지표생물의 독성물질 반응 행동에 대한 수리적 평가)

  • Chon, Tae-Soo;Ji, Chang-Woo
    • Environmental Analysis Health and Toxicology
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    • v.23 no.4
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    • pp.231-245
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    • 2008
  • Various methods for detecting changes in response behaviors of indicator specimens are presented for monitoring effects of toxic treatments. The movement patterns of individuals are quantitatively characterized by statistical (i.e., ANOVA, multivariate analysis) and computational (i.e., fractal dimension, Fourier transform) methods. Extraction of information in complex behavioral data is further illustrated by techniques in ecological informatics. Multi-Layer Perceptron and Self-Organizing Map are applied for detection and patterning of response behaviors of indicator specimens. The recent techniques of Wavelet analysis and line detection by Recurrent Self-Organizing Map are additionally discussed as an efficient tool for checking time-series movement data. Behavioral monitoring could be established as new methodology in integrative ecological assessment, tilling the gap between large-scale (e.g., community structure) and small-scale (e.g., molecular response) measurements.

Environmental Consciousness in Korea: Empirical Analysis (국민환경의식에 대한 실증적 분석)

  • Jo, Yoonae;Kim, Kyung Hwan
    • Environmental and Resource Economics Review
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    • v.12 no.1
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    • pp.177-204
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    • 2003
  • In this paper, we analyze a rather vaguely-defined concept of environmental consciousness by examining causal association among sub-concepts that constitute environmental consciousness; environmental concern, environmental policy evaluation, and environmental practice. An empirical research is conducted on Korean Ministry of Environment's 2000 survey. It was found that environmental concern and environmental practice were highly correlated. While environmental policy evaluation did not show any significant relationship with them, it depended heavily on regime-intimacy instead. Socio-economic factors showed different effects on sub-concepts. Elder and more-educated people showed more environmental concern while female and elderly people were more active on environmental practice. These findings are different from foreign studies, which may suggest that our environmental movement could be understood quite differently from their experience.

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The need to develop Nitrogen Oxides(NOx) Reduction Equipment and Regulation in Marine (선박용 질소산화물(NOx) 저감장치 개발의 필요성 및 규제현황)

  • Kim, Sungyun;Kim, Min
    • 한국연소학회:학술대회논문집
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    • 2012.04a
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    • pp.69-74
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    • 2012
  • Looming global environmental pollution problems around the world movement to minimize the environmental pollution is actively taking place. International Maritime Organization (IMO) a significant portion of the marine pollution by exhaust gases emitted from vessel considered, and accordingly developed around the ship and ship-related environmental regulations, emission standards are going to strengthen gradually, the development of environmentally friendly vessels and equipment is proceeding actively.

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A Case Study on Residents' Involvement in Sk$\"{a}$rk$\"{a}$ll Ecovillage in Sweden (스웨덴 훼르셸 생태마을의 주민참여 실태에 관한 사례연구)

  • Choi, Jung-Shin
    • Journal of Families and Better Life
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    • v.28 no.6
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    • pp.19-34
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    • 2010
  • This study aims to describe actual condition of residents' involvement of Sk$\"{a}$rk$\"{a}$ll ecovillage in Sweden by in-depth interviews with five residents. This study, hopefully, could contribute to offer useful information for forming ecovillage, as well as awakening about ecovillage movement to the public in Korea. The interviews were fulfilled during spring of 2010 in G$\"{o}$teborg and Sk$\"{a}$rk$\"{a}$ll ecovillage in Sweden. The results are as follows: 1) In terms of overall residents' involvement by self-evaluation everybody agrees with that residents' involvement was quite excellent during forming stage of the village, while it has been notably decreased now in running stage. It reveals there is a gap between ideology and reality. 2) Concerning decision making method, they use majority decision instead of consensus, since only 9 households of 20 are residing there all year around, it is hardly possible to assemble all the residents in the meeting. In Accordance with problematic conflicts in the village recently, development of socialization with others and education of communication skill for residents probably could be helpful to resolve conflicts among residents in long term. 3) In terms of evaluation of ecovillage movement in Sk$\"{a}$rk$\"{a}$ll ecovillage, it is the fact that many residents live less self-sufficiently, more energy consumed than the ideology pursuits. Also, they live with close connections with conventional society. Nevertheless, the efforts they are willing to practice 3R principles (Recycle, Reuse, Reduction) have to be highly respected, if we consider its educational influence to environmental movement for the conventional society.