• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.517-518
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• 2011

본 논문에서는 국내 원자력 발전소용 고압케이블의 열화평가를 위해 열적, 화학적 시험을 진행하였다. 최근 설계수명이 종료되는 원자력 발전소와 케이블들에 대한 열화평가 연구가 시작되고 있다. 그러나 현재까지 기초연구 수준에 머물러 있기 때문에 체계적인 열화평가 이루어지고 있지 않다. 따라서 본 논문에서는 국내 원전 고압케이블의 열적, 화학적 시험을 통해 기초 물성자료를 구축하고 열화평가에 이용하기 위해 본 시험을 수행하였다.

• Proceedings of the Korea Contents Association Conference
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• 2006.05a
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• pp.444-447
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• 2006

We propose software reliability growth model, considering testing effort resource during testing stage of S/W, and compare the time dependent testing effort resource behavior in this paper. We develop the data technology method for the S/W reliability measure. We study in detail between the time elapse and reliability. Also, we determine the optimum release time which meets the target reliability. We decide optimum release time for each condition how the reliability is good before testing after development.

• Proceedings of the Korean Geotechical Society Conference
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• 2010.03a
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• pp.1104-1113
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• 2010

In order to reduce negative skin friction uses bitumen most plentifully. But, Bitumen is expensive very of 1.5 or more times of pile material expense. The bitumen will be able to substitute it is nescessary. It was researched that it would be able to bitumen substitutions from in products which is produced from domestic in this study. This was composed with most bentonite, added some cement. When it is used this product in the model test, the reduction ratio appear of 85% or more. In this result, this product as the reduction material is confirmed that has enough ability. Additional research leads, the product according to pile construction method must verify the reduction effect of negativ skin friction in field test.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.15 no.4
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• pp.22-28
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• 2006

Detection of exit burr is very important in manufacturing automation. In this paper, acoustic emission(AE) was used to detect the burr formation during milling. By using wavelet transformation, AE data was compressed without unnecessary details. Then the transformed data were used as selected features (inputs) of a back-propagation artificial neural net. In order to validate the proposed scheme, the wavelet based ANN results were compared with cutting condition(cutting speed, feed, depth of cut, etc.) based ANN results.

• Proceedings of the Korean Society of Life Science Conference
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• 2006.09a
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• pp.108.1-108.1
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• 2006

• Proceedings of the Korean Society of Applied Pharmacology
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• 1998.11a
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• pp.187-187
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• 1998

The objective was to verify biological activities of fruit and stem of prickly pear(Opuntia ficus indica L. var, saboten Makino). We have determined inhibitory activities on enzymes, such as dopamine ${\beta}$-hydroxylase(DBH), monoamme oxidase A and B(MAO-A, B), and antioxidant activity, in vitro. We purchased dried stem powder and lyophilized fruit powder of prickly pear from CheJu Island, and prepared the extracts with 80% of methanol. The fruit extract showed stronger inhibitory effects on MAO-A and -B and antioxidant activity compared. to the stem extract, on fractionation with hexane, ethyl acetate, butanol and water. Both the stem and the fruit extracts with ethyl acetate showed stronger enzyme inhibitory and antioxidant activities than other extracts. Now we are isolating active principles from both ethyl acetate extracts.

• IE interfaces
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• v.10 no.3
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• pp.55-62
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• 1997

Among the driving methods of CALS, Electronic Data Interchange (EDI), the pivot of procurement and logistics, is becoming the standard of data interchange. In this article, we examine the standard, growth, and status of EDI, and present a scheme to make it available via Internet that grow to be a standardized network, in comparison with a method to use a Value Added Network(VAN). So we studied an implementation of EDI system to exchange and process the business intra-works in order to integrate it into Intranet environment. As well, we present a client/server model running under Intranet environment, and a system with a format server to share the load of server and client. To do this, we list the functions and requirements of EDI system, connect a database to the Intranet, and develop applications using $Java^{TM}$.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.11a
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• pp.955-958
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• 2004

웹접근성은 능력, 기술이나 상황에 관계없이 모든 인터넷 사용자에게 제공되는 정보와 서비스의 가용성을 의미한다. 시각 장애인, 난독중자, 청각장애인 등과 같은 사용자 그룹은 대부분의 웹사이트에서 접근장벽을 경험하고 있다. 한국의 공공기관 웹사이트에 대한 접근성 보고도 2003년 최초로 발표되었으나, 지방 자치단체에 관한 것은 발표된 바 없다. 본 연구에서는 충북지역의 웹 접근성을 평가하였다. 그 결과 거의 보든 대상 사이트가 접근성이 떨어지며, 접근성 교육이 웹 관리자나 프로그래머에게 시급히 필요한 것으로 보인다.

• Proceedings of the KIEE Conference
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• 1999.07g
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• pp.3322-3324
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• 1999

This paper studies on the design and fabrication of a micro in-plane positioning actuator integrated with a microlens. Proposed in-plane actuator is a micro XY-stage which is composed of two linear comb drive actuators being orthogonal to each other. In the fabrication of actuator, the single crystalline silicon substrate anodically bonded with a #7740 glass substrate is used because of simple release and passivation. The structure of actuator is formed on the silicon facet of bonded fixture by chlorine-based deep RIE and then released by isotropic wet etching of glass (#7740) in hydrofluoric acid solution. Fabricated actuator has a large travel range up to $30({\pm}15){\mu}m$ and high resolution less than 0.01f1l1l in each direction. Experimented resonant frequency of this actuator is 630Hz. The micro-Fresnel lens is fabricated on the square-shape glass structure prepared in the center of actuator.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2006.06a
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• pp.717-729
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• 2006

소프트웨어 신뢰도 성장 모델을 비동차 포아송 프로세스(NHPP)로 공식화하고, 이 모델을 이용하여 소프트웨어 신뢰도 척도에 대한 데이터 분석기법을 개발한다. 그간 여러 문헌에서 소프트웨어 신뢰도 성장 모델을 연구할 때 소프트웨어 테스트 중에 소요되는 테스트노력의 양으로서 지수함수형, 레일레이형, 웨이불형, 로지스틱형 테스트노적함수를 고려하여, 경우에 따라 이 중 하나의 적합한 형태를 사용해 왔다. 본 논문에서는 이 네 가지 형태에 대해서 최소자승평가자(LSE)와 최대가능성평가자(MLE)를 써서 파라미터를 구하는 방법을 검토한다.