• Journal of the Korea Academia-Industrial cooperation Society
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• v.2 no.2
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• pp.107-113
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• 2001

This work presents field-dependent Bingham and response characteristics of MR fluids under shear and flow modes. Two different types of magneto-viscometers are designed and manufactured for the shear and flow modes. respectively. For the MR fluid to be tested, MRF-132LD of Lord co. is employed. The field-dependent yield stress is experimentally distilled at various temperatures using the magneto-viscometers. Time responses of the MR fluids to step electric fields are also evaluated under two operating modes.

• The Science & Technology
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• v.33 no.12 s.379
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• pp.10-11
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• 2000

우리나라의 핵융합실험은 대형의 토카막으로 자기 핵융합실험인데 막대한 국력을 자기 핵융합장치 토카막에만 집중하는 것보다 그 예산의 일부나마 레이저 핵융합연구에 돌려 미래의 에너지 기술전쟁에 대비하는 것이 바람직하다. 10~30년후 레이저 핵융합 분야의 연구에 있어서 기술종속국이 되지 않기 위해선 관련 기반연구에 대한 우선 투자가 필수적이라고 생각한다.

• Korean Security Journal
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• no.47
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• pp.119-137
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• 2016

In a recent period, it becomes more and more important to keep the cutting-edge industrial technology secured. This is because competitive technology appears to be a cornerstone of national power. Although the industrial espionage must be an illegal behavior or a kind of white-collar crime, there has been few researches on industrial espionage from a criminological perspective. This study investigates the relationship between industrial espionage, self-control, and organizational commitment. The hypotheses of this study were found to be statistically significant. The hypothesis 1 that the high self-control reduces the possibility of industrial espionage was accepted, and the hypothesis 2 that the high organizational commitment reduces the possibility of industrial espionage was also accepted. This results showed that self-control and organizational commitment were the key factors to prevent industrial espionage, which eventually reinforces industrial security. This study used a convenient sampling, which might be the limits of this study. By using a convenient sampling, the result of the study could not depend on representative sample. Nonetheless, this study was trying to explore the relationship between industrial espionage, self-control, and organizational commitment which was not researched yet. The purpose of this study is to contribute to find out the criminological causes of industrial espionage and eventually to prevent it.

• The Journal of the Korea Contents Association
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• v.8 no.8
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• pp.128-146
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• 2008

Cyworld has created a new social phenomenon that relationship between people and communities could be built by committing to digital writing. It has altered the way of people's writing attitudes from self-confessed to self-describing and self-broadcasting ways in which one regards oneself as the center of the cyber world. The purpose of this paper is to identify the shift in one's writing attitudes and how he/she develops technologies of the self in the Cyworld space. Quantitative and qualitative methods support the result; The analysis of 100 Cyworld users' mini-homepages show how the visual images in Cyworld affects their way of digital writing and the analysis of the change of writing habit due to sharing data how virtual 'family' that has been created by Cyworld. I categorize the characteristics of digital writing into three; 1)Visualization of technologies of the self 2)Networked technologies of the self 3)Sharing secretes. The aim of writing in Cyworld is not to keep the secrete but to share and, eventually, texts are circulated in the networked society where one is participated(Cyworld family). Therefore, the usage of images plays a significant role in Cyworld communities because the opened secretes are usually prepared to be presented on the basis of trustworthy toward other members.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.12
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• pp.2989-2996
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• 2014

The aim of this study was to search for the effects of health self-efficacy and technology self-efficacy on user's behavioural intention by the extended TAM focused on smartphone base ubiquitous health system. In this research, in view of small sample size, PLS - SEM methodology was applied to this study in order to the proposed research model. As a result of analysis, the statistical fitness of proposed research model was confirmed through GoF value and the path coefficient was calculated for the hypotheses test. Finally, the implications of analysis result showed that when the use of smartphone device could be easily accessed in the side of technology self-efficacy, the possibility of user's behavioural intention also might be higher.

• 전기의세계
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• v.10
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• pp.72-82
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• 1963

자기증폭기는 제어계통의 중요한 요소로써 발전되어왔고 자기재료와 금속정류기의 급진적개량은 자기증폭기를 그 반영구적인 수명과 더불어 Mean Power Amplifier로써 확고하게 하였다. 자기증폭기의 동작특성은 자기철심재료의 비선형특성을 이용한 것으로 문제의 해석을 근본적으로 취급하려면 비선형이론의 문제에 완전히 귀착함으로 인한 난점과 복잡성이 따르게 된다. 그러나 자기증폭기의 특성을 그런 비선형문제로 취급하여서는 선과를 얻기가 대단히 곤란하며 현재의 수학으로써 불가능할 것이다. 본지에서는자기증폭기의 원리 및 각종부하 - 저항부하, 유도성부하, 용량성부하에 대한 동작 특성의 변화에 대하여 기술코져 한다.

• Proceedings of the KIEE Conference
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• 2007.10c
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• pp.241-243
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• 2007

자기부상철도는 철도시스템 특유의 특성을 가진 복합시스템으로, 그동안 장기간 기술개발을 걸쳐 경량전철형의 도시형 자기부상열차가 개발되었다. 현재 2006년부터 국내 상용을 목표고 하는 대규모의 실용화사업이 추진되고 있다. 이와 같은 대규모의 복잡한 시스템에 대한 프로젝트에는 생명주기 개념이 적용된 프로젝트 관리 및 기술서인 시스템엔지니어링을 기반으로 하는 사업추진이 필수적이다. 시스템엔지니어링 관리계획서(SEMP; Systems Engineering Management Plan)는 관련 프로젝트에 대한 시스템엔지니어링 분야의 최상위 계획으로, 프로젝트 추진방안 및 일정, 예산, 기술적 목표 등과 함께 시스템엔지니어링 기능 및 수행작업, 업무범위, 조직구조, 인터페이스 등에 대한 내용을 포함하여 기술한 문서를 말한다. 본 논문에서는 도시형 자기부상철도에 대한 실용화사업의 계획 수립을 통하여 SEMP를 작성하면서, SEPM에 대한 문헌조사 및 분석과 함께 SEMP의 작성 방안 및 과정을 보였다. 또한 이를 컴퓨터 기반의 도구를 사용하여 작성되도록 하였다.

• 대한공업교육학회지
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• v.36 no.2
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• pp.111-130
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• 2011

The purpose of this study was to identify a causal relationship among commitment to change, needs of technology education innovation, communication and self-efficacy of technology teachers. A total of 300 copies of questionnaires were used for data analysis except for 117 copies like the one where insincerely responds to any question was found. To ensure the reliability and validity of questions, I performed technical statistics like average, standard deviation, skewness, and kurtosis via PASW 18.0, item-total correlation and the totality, and reliability analysis. I undertook a confirmatory factor analysis via AMOS 7.0 to ensure the validity of items together with a structural analysis to perform a path analysis among variables and assess the suitability of model. The major finding of this study were as follows: First, because fit index of hypothetical model generally met standards in this study, a hypothetical model was judged appropriately. Second, needs of technology education innovation had a positive effect on communication and commitment to change of technology teachers. And, communication among technology teachers had a positive effect on commitment to change of technology teachers. This result means that communication among technology teachers is important to activation of technology education. Third, self-efficacy had a positive effect on commitment to change of technology teachers. This result means that it needs to raise self-efficacy level through teacher education.

• Proceedings of the Korean Magnestics Society Conference
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• 2004.12a
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• pp.7-7
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• 2004

• Proceedings of the Korean Magnestics Society Conference
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• 2001.04a
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• pp.13-13
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• 2001