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A Data Mining System for Supporting of Business Intelligence in e-Business (e-Business에서의 BI지원 데이타마이닝 시스템)

  • Lee, Jun-Wook;Baek, Ok-Hyun;Ryu, Keun-Ho
    • Journal of KIISE:Computing Practices and Letters
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    • v.8 no.5
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    • pp.489-500
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    • 2002

  • As the interest in business interest is increased, data mining is increasingly used in BI as the core technique. To support Business Intelligence in e-business environment, the integrated data mining system which included in various mining operations should be able to flexibly integrate with database system and also it must provide the easy and efficient interface to implement the marketing process in various business applications. In this paper, we have implemented the EC-DaMiner system to support business intelligence in e-business area. The implemented system can be integrated with the conventional database system with the standard interface. Business applications can use MQL mining query language to discover the rules and mining result is modeled in marketing database, and the EC-DaMiner system make the implementation of business marketing process more easy.

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Interaction Patterns in Distance Only Mode e-Learning

  • SUNG, Eunmo
    • Educational Technology International
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    • v.10 no.2
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    • pp.127-143
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    • 2009

  • The purpose of this study was to identify the interaction patterns in distance only mode e-Learning. In order to investigate this study, messages shown in the electronic notice board were analyzed to see how interaction occurs between teacher and learner or learner and learner under the e-learning of cyber university. To analyze messages was applied according to the framework by Henri's contents analysis model. As a result of contents analysis on electronic board, the participative dimension was 399 messages. A learner put on 7~8 messages a day. The number of messages was low compared to the number of learners, but the number of inquiries was about 140. That means that each learner contacts and checks messages at least once a day. The meaning dimension was 600 units. The main interaction patterns were Interactive-social-cognitive-metacognitive. This means that e-Learning in distance only mode leads a positive attitude of learners as a self-directed learning, and needs teacher's well-structured instructional strategies for increasing interaction. In conclusion, social dimension and interactive dimension of messages support learners psychologically in the process of learning though they directly guide learning under the circumstances of e-learning lacking face-to-face element. It can be interpreted that the teacher's role is significantly important in order to attract learners' positive participation and cognitive and meta-cognitive dimension of messages and activities

  • https://doi.org/10.23095/ETI.2009.10.2.127 인용 PDF

Risk Evaluation of Scrubber Deposition By-Products in the Diffusion Process (Diffusion 공정 내 스크러버 퇴적 부산물의 위험성 평가)

  • Minji Kim;Jinback Lee;Seungho Jung;Keunwon Lee
    • Journal of the Korean Institute of Gas
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    • v.28 no.2
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    • pp.76-83
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    • 2024

  • In the semiconductor manufacturing process, the Diffusion process generates various reactive by-products. These by-products are deposited inside the pipes of post-processing and exhaust treatment systems, posing a potential risk of substantial dust explosions. In this study, three methods material verification, selection of analysis samples, and risk analysis were employed to address the substances produced during the Diffusion process. Among the materials handled in the Diffusion process, ZrO2, TEOD, and E-DEOS were identified as raw material capable of generating by-product dust. Test for Minimum Ignition Energy and dust explosion were conducted on the by-products collected from each processing facility. The results indicated that, in the case of MIE, none of the by-products ignited. However, the dust explosion test revealed that ZrO2 exhibited a maximum pressure of 7.6 bar and Kst value of 73.3 bar·m/s, its explosive hazard. Consequently, to mitigate such risks in semiconductor processes, it is excessive buildup.

  • https://doi.org/10.7842/kigas.2024.28.2.76 인용 PDF

Electrical Transport Properties of $La_{0.7}Sr_{0.3}FeO_{3}$ ($La_{0.7}Sr_{0.3}FeO_{3}$ 세라믹스의 전기전도 특성)

  • 정우환
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.14 no.5
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    • pp.376-382
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    • 2001

  • Magnetic and transport properties in the ceramic specimen of L $a_{0.7}$S $r_{0.3}$Fe $O_3$ with orthohombic structure has been investigated. Weak ferromagnetism has been observed in a ceramic sample of L $a_{0.7}$S $r_{0.3}$Fe $O_3$. Large dielectric relaxation of Debye type is observed in paramagnetic states within the temperature range of 130K~200K. From the temperature dependence of the characteristic frequency, we concluded that the elementary process of the dispersion is related to holes hopping between F $e^{3+}$ and F $e^{4+}$ ions. The temperature dependencies of thermoelectric power and Dc conductivity suggest that the charge carrier responsible for the conduction are strongly localized. These experimental results have been interpreted in terms of a hopping process involving small polaron.n.laron.n.

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LIMIT THEOREMS FOR MARKOV PROCESSES GENERATED BY ITERATIONS OF RANDOM MAPS

  • Lee, Oe-Sook
    • Journal of the Korean Mathematical Society
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    • v.33 no.4
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    • pp.983-992
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    • 1996

  • Let p(x, dy) be a transition probability function on $(S, \rho)$, where S is a complete separable metric space. Then a Markov process $X_n$ which has p(x, dy) as its transition probability may be generated by random iterations of the form $X_{n+1} = f(X_n, \varepsilon_{n+1})$, where $\varepsilon_n$ is a sequence of independent and identically distributed random variables (See, e.g., Kifer(1986), Bhattacharya and Waymire(1990)).

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