• BMB Reports
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• v.41 no.9
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• pp.651-656
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• 2008

A mouse with cataract, Kec, was generated from N-ethyl-N-nitrosourea (ENU) mutagenesis. Cataract in the Kec mouse was observable at about 5 weeks after birth and this gradually progressed to become completely opaque by 12 weeks. Dissection microscopy revealed that vacuoles with a radial or irregular shape were located primarily in the cortex of the posterior and equatorial regions of the lens. At the late stage, the lens structure was distorted, but not ruptured. This cataract phenotype was inherited in an autosomal recessive manner. We performed a genetic linkage analysis using 133 mutant and 67 normal mice produced by mating Kec mutant (BALB/c) and F1 (C57BL/6 $\times$ Kec) mice. The Kec locus was mapped to the 3 cM region encompassed by D14Mit34 and D14Mit69. In addition we excluded coding sequences of 9 genes including Rcbtb2, P2ry5, Itm2b, Med4, Nudt15, Esd, Lcp1, Slc25a30, and 2810032E02Rik as the candidate gene that causes cataract in the Kec mouse.

• Journal of Engineering Education Research
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• v.8 no.2
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• pp.52-63
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• 2005

The purpose of this study is to make proposals for the execution of KEC2005. Many universities have taken part in the accredited engineering education programs in order to solve points at issue and to provide world-standard engineering education. Accordingly, ABEEK carried out a research on accreditation criteria that suit Korean system and made an announcement of KEC2005 in 2004. Both accredited and planning-to-be-accredited universities experience difficulty in changing KEC2000 into KEC2005. Major proposals of this study are as follows: First, ABEEK should suggest required conditions of accreditation criteria and detailed examples of them. Second, model and methodology for achievement of outcomes should be presented. Third, practical evaluation should be carried out with professors' voluntary participation. fourth, re-education of engineering education programs evaluators should be carried out. Fifth, ABEEK need to provide an aggressive request for advice and accurate information to universities to be accredited engineering education programs.

• The Magazine of the IEIE
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• v.35 no.7
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• pp.47-56
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• 2008

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.14 no.4
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• pp.27-39
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• 2015

This study addressed the process to construct, operate, verify the test beds, which had been equipped with a variety of core technologies such as WAVE, Road-Radar, Smart Tolling developed by Smart Highway Project. We have met our research goals, but there were limitations to secure the performance and user feedback because of small scale and short operating time. So, we will enhance user safety, convenience and comfort by accumulating and analyzing big data then improving testbeds and related technologies through subsequent research projects for a long time.

• Journal of Engineering Education Research
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• v.13 no.4
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• pp.3-14
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• 2010

This paper examines what kind of writing ability KEC2005 requires for upper grades of engineering college. According to KEC2005, they need writing ability in the field of majors, especially capstone design subjects as well as general communication skills. An experience on preparing a quasi-research paper has some potential to be better for these demands than other writing training forms. The contents of assignments submitted by the students taking a class 'Writing in Science & Technology' in Seoul National University in 2009 supported this point of view. This paper is about a case study discussing the detailed relationship between KEC2005 and writing, and helps engineering colleges to design their own writing programs.

• Proceedings of the IEEK Conference
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• 2003.07c
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• pp.2831-2834
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• 2003

본 논문에서는 PWM 방식을 이용한 THERMO-CON 제어 회로를 제안하였다. 제안한 회로는 정전압을 형성하기 위한 레귤레이터, 신호를 처리하기 위한 op-amp, 삼각파를 만들기 위한 OSC, 그리고 부하의 상태를 감지하기 위한 AMC 와 ISC 로 구성된다. 테스트 결과 서지 전압인가 시 PWM 방식으로 동작하여 회로의 P/sub D/(Power Dissipation)을 줄여 소자의 파괴를 막고 중부하 시(여러 개의 릴레이 구동 시) PWM 동작을 하여 소자의 파괴를 막는다는 것을 확인하였으며, 출력 쇼트 시 쇼트보호회로에 의해 출력 트랜지스터의 파괴를 막는다는 것을 확인하였다.

• Journal of Engineering Education Research
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• v.18 no.3
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• pp.33-38
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• 2015

Engineering education accreditation, such as by ABEEK in Korea or ABET in USA, centers around outcomes-based education (OBE). Outcomes are the abilities or competencies which students are expected to achieve by the time of graduation. Engineering programs must design the curriculum, educate their students, and assess the performance of them in accordance with the program outcomes. Consequently, sound understanding of the program outcomes is crucial to the successful implementation of OBE. Most of the 12 outcomes of ABEEK KEC2005 criteria came from ABET criteria written in English. It means that, apart from sound understanding of the outcomes, we need to care about the correct translation of the ABET outcomes from English to Korean. The translation of them as in KEC2005, however, leaves something to be desired. This paper tries to present the correct translation of some program outcomes as well as sound understanding of a few outcomes difficult to define.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.27 no.5
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• pp.823-832
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• 2003

To define the causes of cladding degradation which can take place during the operation of nuclear power plants, it is required to develop the new fracture toughness test of spent fuel cladding. The fracture toughness of Zircaloy-4 cladding was estimated using the recently developed KAERI embedded Charpy (KEC) specimen. Axially notched KEC specimens cut directly from unirradiated fuel claddings, were tested in a way similar to the standard toughness test method of a Single Edge Bending (SEB) specimen. The results of KEC fracture toughness test at room temperatures were discussed and compared with those of the previous other studies. In conclusions, even though the KEC fracture toughness test of nuclear fuel claddings was easier and more reliable than those developed earlier, the results from the cladding fracture tests were not the material characteristics but the specific fracture parameters which were deeply related to the specification of claddings. In addition, the phenomenon of a thickness yielding was not observed from the fracture surface. It was closely related to the fact that the plane strain condition of the KEC specimen was changed to the plane stress condition during crack advancing. It was also supported by the fractographic evidence that the formation of ductile dimples at the crack initiation became the similar appearance such as a quasi-cleavage after the sufficient crack advancing.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1631-1632
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• 2015

기술의 발전과 사회/환경변화, WTO/TBT 및 FTA 협정 이행을 위한 국제표준 도입 등 대내 외적 환경에 능동적/선제적으로 대처하기 위하여 국제표준 수준의 규정인 한국전기규정(KEC) 제정(안)을 개발하고 있다. 한국전기규정(KEC)은 국제표준인 IEC를 근간으로 하고, 상세사항은 DIN, BS, NEC 등의 선진표준을 참조, 국내외 표준들의 비교/조사를 통한 개발을 목적으로 제정 중에 있다. 한국전기규정(KEC)은 제1편 공통분야와 제2편 저압전기설비분야, 제3편 고압전기설비분야, 제4편 지능형전력망분야 등 총 4편으로 구성되며 이 중 피뢰시스템은 IEC 62305를 기초로 하여 제정되었다. 본 논문에서 한국전기규정(KEC) 제1편 제5부 피뢰시스템분야에 대한 중요사항에 대해 제시하였다.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1633-1634
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• 2015

WTO/TBT 협정에 따라 2006년부터 IEC 전선의 전면적인 사용과 전기설비기술기준의 판단기준에 IEC 60364 저압전기설비분야의 도입으로 국내현장에서 국제표준을 적용할 수 있게 되었다. 그러나 국제표준(IEC)은 내용이 포괄적이며, 원론적인 부분을 다루고 있어 실제 현장 적용에 많은 어려움이 있다. 이에 따라 대한전기협회에서는 국제표준(IEC)을 기초로 하여 국제수준과 대등한 "한국전기규정 KEC"를 제정중이며, 본 연구는 KS C IEC 60364-5-52 기초로 작성한 KEC 제2편 저압전기설비분야 제43장 배선설비의 제정현황을 소개하는 것이다.