• Geomechanics and Engineering
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• v.16 no.5
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• pp.471-482
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• 2018

A flat-jointed bonded-particle model (BPM) has been proved to be an effective tool for simulating mechanical behaviours of intact rocks. However, the tedious and time-consuming calibration procedure imposes restrictions on its widespread application. In this study, a systematic approach is proposed for simplifying the calibration procedure. The initial relationships between the microscopic, constitutive parameters and macro-mechanical rock properties are firstly determined through dimensionless analysis. Then, sensitivity analyses and regression analyses are conducted to quantify the relationships, using results from numerical simulations. Finally, four examples are used to demonstrate the effectiveness and robustness of the proposed systematic approach for the calibration procedure of BPMs.

• Environmental Engineering Research
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• v.8 no.3
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• pp.152-161
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• 2003

• Journal of Environmental Science International
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• v.6 no.4
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• pp.293-302
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• 1997

Environmental problems emerged as common global Problems awaiting solution. Active collaborative efforts are required of nations and communities In order to solve environmental problems effectively. International collaboration occurs much more commonly these days than before. and European Community(EC) mumber countries are no exceptions. EC has established and executed the five-year programs on Environmental Policy Implementation, which explicated basic principles for enoronmental policy development, stance 1973. EC programs tend to emphasize that the direction of the policies should reflect a change from a remedial approach to a preventive approach. Those pro- grams have brought an awareness of the Importance of Environmental Impact Assessment(EIAI to EC member countries. France Installed an EIA system In 1976, which was the first among member countries. Several other member countries also established a system. EC decided that a common guideline was necessary. and therefore formulated the "European Community Guideline for Environmental Impact Assessment" In 1985. All member countries were required to legislate an EIA system within three years, according to the Guideline. This study will conduct a comparative analysis of the current EIA systems of different EC member counties. The findings of this study will provide helpful Information on how to Improve the efficacy of the Korean system.an system.

• Hwankyungkyoyuk
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• v.12 no.1
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• pp.322-334
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• 1999

In environmental value education, the difference between Ecological and Economic view-point about environmentmust should be considered. Usually, although the differences are unavoidable, because our lifes are inclined to Economic life. But this propensity have become great obstacles to Environmental value education by diluting the fundamental reasons which the nature should be preserved. Furthermore we can't say that environmental problems are not solved just by economic approach, owing to its limits of solving by incentives. So we can say that it is very important to have equalized view-points in the relations of economics and ecology for balanced environmental value education. This study is to alternative environmental value education program, to have equalized view-points in the relations of economics and ecology through the small community located in Japan. The exact name of that program is GENSANGGAI. They have persued to attain a spiritual state of complete absence of ego through this program, and this spiritual state can be important environmental value educaton goal, which make the student to see the evironment with equalized view-points in the interdependence between economics and ecology. we can say that this program can be a kind affective (sentimentally perceived) environmental education program. It can be good environmental education program in affective domain. we can say that equalized view-points is to attain a spiritual state of complete absence of ego. This program is some similar to Kohlberg's latter term theory and Open educationin theory in substantial aspect, he persued Just Community Approach through Kibbutz in Israel. From the basis of his theory, if the GENSANGGAI program, which means harmony between socialization and development of moral stage, individualism and communism.

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2003.10a
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• pp.29-30
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• 2003

• Hwankyungkyoyuk
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• v.10 no.2
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• pp.19-50
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• 1997

• Proceedings of KOSOMES biannual meeting
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• 2000.05a
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• pp.53-66
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• 2000

• Hwankyungkyoyuk
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• v.14 no.1
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• pp.19-31
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• 2001

This study examined the effect of environmental alteration and prompts on recycling behavior. An A-B-BC with a control condition design was employed. Subjects in this study were college students, professors, and employees at a university building. After a baseline phase, environmental alteration was I effect in the next phase and both environmental alteration and prompts were in effect in the final phase for the control condition. The environmental alteration consisted of providing four separation containers for the paper cups, cans recyclable paper, and the disposable on each floor in the building. The prompts consisted of providing the information about the importance of environmental preservation and how to separate the materials in the appropriate containers using an information board and pamphlets. The dependent variables were (1) the number of cans collected in can container, (2) the number of paper cups collected in cup container, (3) the rate of correct separation of cans, (4) the rate of correct separation of paper cups, and (5) the weight of disposable. The rates of correct separations of cans and paper cups were obtained by calculating the percentage of thenumber of recyclable cans and paper cups in the corresponding containers. The results indicated that environmental alteration had positive effects on all the dependent variables. Also, when the prompts were added to the environmental alteration, the incremental effect of the prompts was demonstrated. The implications and limitations of theses findings were discussed and the direction of future studies was also proposed.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.10a
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• pp.297-302
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• 2008

The positioning technology for a moving object is an important and essential component of ubiquitous computing environment and applications, for which Radio Frequency Identification(RFID) has been considered as a core technology. RFID-based positioning system calculates the position of moving object based on k-nearest neighbor(k-nn) algorithm using detected k-tags which have known coordinates and kcan be determined according to the detection range of RFID system. In this paper, RFID-based positioning system determines the position of moving object not using weight factor which depends on received signal strength but assuming that tags within the detection range always operate and have same weight value. Because the latter system is much more economical than the former one. The geometries of tags were determined with considerations in huge buildings like office buildings, shopping malls and warehouses, so they were determined as the line in I-Dimensional space, the square in 2-Dimensional space. In 1-Dimensional space, the optimal detection range is determined as 125% of the tag spacing distance through the analytical and numerical approach. Here, the analytical approach means a mathematical proof and the numerical approach means a simulation using matlab. But the analytical approach is very difficult in 2-Dimensional space, so through the numerical approach, the optimal detection range is determined as 134% of the tag spacing distance in 2-Dimensional space. This result can be used as a fundamental study for designing RFID-based positioning system.

• The Journal of Engineering Geology
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• v.18 no.3
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• pp.297-302
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• 2008

The main reason of the pollution caused by soils and tailings located at discussed mines is heavy metals and AMD(acid mine drainage). Human health is affected by these pollutants which are spreaded from the abandoned mines. In this study, we try a mathematical approach to predict the pollution level of heavy metals caused by the surrounding soils of abandoned mines. The new approach is established with the correlation between the distance and pH, ORP. The change of pH and ORP can be described by the rate of initial values to experimental values. We demonstrate a realistic possibility of the mathematical approach to assess an environmental impact from disused mines cause the rate range is 0.95 to 1.03 for 60 days. Therefore our proposed approach will be useful as a few promising method for the management of heavy metals in many mines.