• Title/Summary/Keyword: 수리논리

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A Study on the Prediction of Groundwater Contamination using GIS (GIS를 이용한 지하수오염 예측에 관한 연구)

  • Jo, Si-Beom;Shon, Ho-Woong;Lee, Kang-Won
    • Journal of Korean Society for Geospatial Information Science
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    • v.12 no.2 s.29
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    • pp.17-28
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    • 2004
  • This study has tried to develop the modified DRASTIC Model by supplying the parameters, such as structural lineament density and land-use, into conventional DRASTIC model, and to predict the potential of groundwater contamination using GIS in Hwanam 2 District, Gyeonggi Province, Korea. Since the aquifers in Korea is generally through the joints of rock-mass in hydrogeological environment, lineament density affects to the behavior of groundwater and contaminated plumes directly, and land-use reflect the effect of point or non-point source of contamination indirectly. For the statistical analysis, lattice-layers of each parameter were generated, and then level of confidence was assessed by analyzing each correlation coefficient. Groundwater contamination potential map was achieved as a final result by comparing modified DRASTIC potential and the amount of pollutant load logically. The result suggest the predictability of contamination potential in a specified area in the respects of hydrogeological aspect and water quality.

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A Study on the Prediction of Groundwater Contamination using the GIS in Hwanam 2 Sector, Gyeonggi Province, Korea (GIS를 이용한 경기도 화남2지구의 지하수오염 예측에 관한 연구)

  • Son, Ho-Ung
    • The Journal of Engineering Research
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    • v.5 no.1
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    • pp.89-107
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    • 2004
  • This study has tried to develop the modified DRASTIC Model by supplying the parameters, such as structural lineament density and landuse, into conventional DRASTIC model, and to predict the potential of groundwater contamination using GIS in Whanam 2 Area, Gyeonggi Province, Korea. Since the aquifers in Korea is generally through the joints of rock-mass in hydrogeological environment, lineament density affects to the behavior of groundwater and contaminated plumes directly, and land-use reflect the effect of point or non-point source of contamination indirectly. For the statistical analysis, lattice layers of each parameter were generated, and then level of confidence was assessed by analyzing each correlation coefficient. Composite contamination map was achieved as a final result by comparing modified DRASTIC potential and the amount of generation load of several contaminant sources logically. The result could suggest the predictability of the area of contamination potential on the respects of hydrogeological aspect and water quality.

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Physical Habitat Modeling in Dalcheon Stream Using Fuzzy Logic (퍼지논리를 이용한 달천의 물리서식처 모의)

  • Jung, Sang-Hwa;Jang, Ji-Yeon;Choi, Sung-Uk
    • Journal of Korea Water Resources Association
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    • v.45 no.2
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    • pp.229-242
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    • 2012
  • This study presents a physical habitat modeling of adult Zacco platypus in a reach of the Dalcheon Stream located downstream of the Goesaan Dam. CASiMiR model is used to estimate habitat suitability index based on the fuzzy logic. Results are compared with those from River2D model, which uses habitat preference curve for habitat suitability index. Hydraulic data simulated by River2D are used as input data for CASiMiR model after verification against field measurements. The result shows that the habitat suitability of the adult Zacco platypus is maximum around the riffle area located upstream of the bend. CASiMiR and River2D estimate the maximum weighted usable areas at the discharge rates of 7.23 $m^3/s$ and 9.0 $m^3/s$, respectively. Overall comparison of the two models employed in this study indicates that CASiMiR model overestimates the weighted usable area by 0.3~25.3% compared with River2D model in condition of drought flow (Q355), low flow (Q275), normal flow (Q185), and average-wet flow (Q95).

Whitehead's Concept of Proposition and Creative Advance of Nature (화이트헤드의 명제론 연구 - 화이트헤드의 명제론과 현실의 창조적 전진 -)

  • Chun, Chul
    • Journal of Korean Philosophical Society
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    • v.116
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    • pp.351-370
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    • 2010
  • Whitehead's metaphysics and philosophy of nature rest on his awareness of the metaphysical problem of the relation between "I", the "creative advance" and forces of the universe. Whitehead attempted to systematize human experience of the world based on logical explorations. In this context it is important to note that his discussion of proposition and language is closely connected with his works on a systematic theory of nature. Whitehead proposes a metaphysical concept of proposition also based on the creative advance of the universe. His theory of proposition is designed to show that human language is constructions of the relations between logical and real events in the creative universe which refer to a particular point of view. In this view, a variety of verbal possibilities in the multiple worlds can be realized in the same proposition. For Whitehead the emergence of novelty in the function of proposition is an essential property of the creative universe. This paper will try to give a discussion to Whitehead's theory of proposition with regard to the emergence of nature. Especially I emphasize in this paper Whitehead's idea and meaning of proposition for the development of the creative advance of nature as one aspect of particular importance.

Development of an Evaluation System for Asphalt Pavement Condition Using Fuzzy Set Logic (모호집합(模糊集合)의 논리(論理)를 이용(利用)한 연성포장(延性鋪裝)의 평가기법개발(評價技法開發))

  • Kim, Kwang Woo;Park, Je Seon
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.11 no.1
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    • pp.125-134
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    • 1991
  • Since comprehensive examination of flexible pavement is complex, evaluation of its condition has been based on subjective judgements. Especially, qualitative measure of pavement has been based on linguistic expressions which often cause misinterpretation. There has been no such a criterion that can appropiately assess pavement status. Therefore, this study was devised to develop an approach, using fuzzy set concept, for evaluation of current and expected service conditions of flexibel pavement surface course. An example study was conducted to verify its usefulness. Since arithematic operation of fuzzy set can quantify the linguistic values and translate them into illustrative models, the results shown in the example was easy for anyone to understand.

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A Study on the Application of Lakatos's Methodology to Teaching Elementary Mathematics (Lakatos 방법론을 초등수학에 적용하기 위한 연구)

  • 강문봉
    • Journal of Educational Research in Mathematics
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    • v.14 no.2
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    • pp.143-156
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    • 2004
  • Lakatos's mathematical philosophy implies that the mathematical knowledge is quasi-empirical and provides the context where mathematics grows and develops. So, it is educationally significant. But, it is not easy to apply Lakatos's methodology to teaching elementary mathematics, because Lakatos's logic of the mathematical discovery is based on the proofs and refutations but elementary mathematics does not contain any proof. This study is to develop the schemes that apply Lakatos's methodology to teaching elementary mathematics and to provide the teaching examples. I devised the teaching process and the curriculum development method. And I developed the teaching examples.

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An Analytical Investigation on the Cause for Mooring Chain Cut in a Naval Moored to a Buoy (부표계류 함정의 계류체인 절단원인에 관한 분석적 연구)

  • Lim, Bong Taeck
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2009.05a
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    • pp.551-555
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    • 2009
  • This study analyzed the cause for mooring chain cut in a naval ship moored, in preparation for a typhoon approach, to a buoy in a shelter. The result of the analysis led to a very interesting fact. That is, while officers usually understood the cut results from the fact that the wind and the tide were stronger than what the mooring chain can hold, according to the study, it was analyzed the impact power at the point where the mooring chain and the ship's body met was a main factor in the cut. Also, it was confirmed that the analytic result of the study is more logical from the point of mathematical analysis and that the cut corresponds to what the then-witnesses stated about the situation.

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An α-cut Automatic Set based on Fuzzy Binarization Using Fuzzy Logic (퍼지논리를 이용한 α-cut 자동 설정 기반 퍼지 이진화)

  • Lee, Ho Chang;Kim, Kwang Baek;Park, Hyun Jun;Cha, Eui-Young
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.12
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    • pp.2924-2932
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    • 2015
  • Image binarization is a process to divide the image into objects and backgrounds, widely applied to the fields of image analysis and its recognition. In the existing method of binarization, there is some uncertainty when there is insufficient brightness gap between objects and backgrounds in setting threshold. The method of fuzzy binarization has improved the features of objects efficiently. However, since this method sets ${\alpha}$-cut value statically, there remain some problems that important features of objects can be lost during binarization. Therefore, in this paper, we propose a binarization method which does not set ${\alpha}$-cut value statically. The proposed method uses fuzzy membership functions calculated by thresholds of mean, iterative, and Otsu binarization. Experiment results show the proposed method binaries various images with less loss than the existing methods.

Design of Educational Game for Development of Creativity (창의력 계발을 위한 학습게임의 설계)

  • Ahn, Seong-Hye;Song, Su-Mi
    • The Journal of the Korea Contents Association
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    • v.7 no.9
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    • pp.1-9
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    • 2007
  • Recently, the primary school training courses requires creative human being who is able to solve problem in accordance with rapidly changing society. Accordingly, it needs development of edutainment contents that can develop creativity and heighten educational effect as attracting learner's interest. This paper intends to design educational game which can develop creativity. Method of research is based on the concept of creativity and theory of multiple intelligence. First, I pulled out educational elements of edutainment game which can develop ability to solve synthetic problem and then drew interest elements of edutainment game by combined game with form of cartoon. Secondly, creativity studying area set the 5 learning area of verbal, visual, mathematical, logical and analytic creativity and then, a course of learning was designed to have each 3 details of 5 teaming areas of creativity. Finally, it presented production direction of educational game by combined with 4 elements of the interest that is an avatar, achievement of a mission, a time limit and win a point.

Intelligent System Design for Knowledge Representation and Interpretation of Human Cognition (인간 인지 지식의 표현과 해석을 위한 지능형 시스템 설계 방법)

  • Joo, Young-Do
    • Journal of Korea Society of Industrial Information Systems
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    • v.16 no.3
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    • pp.11-21
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    • 2011
  • The development of computer-based modeling system has allowed the operationalization of cognitive science issues. Human cognition has become one of most interesting research subjects in artificial intelligence to emulate human mentality and behavior. This paper introduces a methodology well-suited for designing the intelligent system of human cognition. The research investigates how to elicit and represent cognitive knowledge obtained from individual city-dwellers through the application of fuzzy relational theory to personal construct theory. Crucial to this research is to implement formally and process interpretatively the psychological cognition of urbanites who interact with their environment in order to offer useful advice on urban problem. What is needed is a techniques to analyze cognitive structures which are embodiments of this perceptive knowledge for human being.