• 지식경영연구
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• 제19권1호
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• pp.41-57
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• 2018

While there are lots of studies on examining the effects of social rapport in many research areas, however, there is a little work in examining the effect of the social rapport in social network service (SNS) contexts. Thus, this study attempts to examine the effect of social rapport in SNS settings. To address the research questions, this study has presented its hypotheses and conducted three experimental approaches by collecting 180 data from student subjects who have prior experiences on using SNSs to verify the hypotheses. This study has examined three experiments the effects of characteristics of Facebook(i.e. the number of mutual friends, the number of post likes, and the post personalities) on the social rapport and user responses. This study has conducted two-way ANOVA to verity its proposed research hypotheses. Based on three experiments, this study found that both the effects of the number of post likes and the number of post likes on the social rapport were not significant. Based upon empirical findings, this study has demonstrated how the effects of social rapports in SNSs were different from those of previous studies, and brought more attentions to the relevant literature.

• 한국통신학회논문지
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• 제36권1B호
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• pp.29-36
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• 2011

NFC(Near Field Communication) 기술은 근접거리(Proximity) 무선 기술로서 다양한 모드에서의 서비스를 지원한다. 특히, NFC 기술은 유사한 RFID 기술에서의 단순한 태그 인식 서비스보다 복잡하고 상호연결 기술 지원으로 소액결제서비스, 티켓팅과 같은 금융서비스 지원이 가능하다. 그 결과로서 NFC 보안 기술은 보다 강력한 보안 기술을 정의하고 있다. 본 논문에서는 NFC 보안 기술에 대한 명세 및 분석하여 NFC 보안기술의 안전성 분석을 기반으로 NFC SE(Secure Element) 대안으로 UICC 카드의 가능성 및 효과에 대해 연구한다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.215-216
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• 2006

The effect of manufacturing parameters on friction characteristics of motorcycle break system was studied using a disk-on-pad type friction tester. Such parameters conditions have an effect on the frictional factor such as applied load, sliding speed, and number of ventilated disk hole. However, it is difficult to know the mutual relation of these factors. In this study, the friction characteristics using design of experiment containing 3 elements were investigated for an optimal condition for the best motorcycle break system employing Full factorial design. From this study, the result was shown that the applied load in frictional factors was the most important, next to sliding speed, number of ventilated disk hole.

• 공업화학
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• 제7권6호
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• pp.1087-1095
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• 1996

Poly(dimethyl siloxane)막을 이용하여 $45^{\circ}C$에서 에탄올/이소프로판올/물의 삼성분 혼합물에 대한 투과증발실험을 행하고, 에탄올과 이소프로판올의 존재가 상호의 투과특성에 미치는 영향을 연구하였다. 에탄올과 이소프로판올은 각각 상호의 투과속도를 감소시키는 경향을 나타내었으며, 이소프로판올이 에탄올의 투과에 미치는 영향보다는 에탄올이 이소프로판올의 투과에 미치는 영향이 더 현저하였다. 투과속도의 감소는 고분자막에 대한 에탄올이나 이소프로판올의 가소화 영향보다는 투과성분 사이의 상호작용에 의한 영향이 더 크기 때문으로 생각되었다. 삼성분 혼합물에서 투과성분 사이의 강한 상호작용은 에탄올과 이소프로판올의 투과에 대한 추진력을 감소시키는 결과를 나타내었다.

• 전자공학회논문지
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• 제50권5호
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• pp.39-49
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• 2013

유한한 기판 크기가 H-평면 마이크로스트립 선형 위상 배열 안테나의 방사 특성에 미치는 영향에 대하여 연구하였다. 서로 다른 유전상수를 가지는 기판을 이용하여 여러 가지 안테나 소자 간 간격과 기판 크기를 가지는 5 소자 H-평면 선형 배열 안테나의 빔 주사각도에 따른 방사 특성을 살펴보았다. H-평면 선형 배열 안테나의 방사 특성이 향상되는 단위 안테나의 중심에서 E-평면 기판 가장자리까지의 거리를 도출하였다.

• 대한가정학회지
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• 제49권7호
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• pp.123-133
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• 2011

The purpose of this study was to investigate the effect of relationship variables between mother-in-law and son-inlaw on a son-in-law's relation-satisfaction and negative perception. The son-in-law subjects were 319 married men aged 20-70 years, who were living their mother-in-laws in Daegu, Kyungpook, the Seoul National Capital Area(Seoul, Kyeonggy, Incheon), Busan or Kyungnam. The major findings of this study are as follows: (1) there was a significant difference in a son-in-law's relation-satisfaction of his relationship with his mother-in-law according to the number of children and (2) mutual support and a mother-in-law's conflicting attitude toward her son-in-law affected the son-in-law's relation-satisfaction and negative perception of his relationship with his mother-in-law.

• 조명전기설비학회논문지
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• 제22권12호
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• pp.64-70
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• 2008

종래의 준 랜덤 주파수 캐리어(PRC : Pseudo-Randomized Frequency Carrier) 변조기법을 3상 H-브리지 멀티레벨 인버터(HBML: H-Bridge Multi-Level Inverter)에 적용하는 경우, 스위칭 주파수의 2배 주파수 영역에서 큰 스펙트럼 클러스터가 그대로 존재하는 문제점이 있다. 본 연구에서는 서로 2배의 주파수 비율을 갖는 2개의 고정주파수 삼각파 캐리어와 3단계 멀티플렉서(MUX : Multiplexer)를 이용하여 종래의 PRC기법의 고조파 스펙트럼 확산 효과를 개선하였다. 제안된 기법은 1.5[kw]급 3상 HBML인버터 구동시스템에 적용하였으며, 종전의 방법과 제안된 방법의 전압 및 전류 고조파 스펙트럼을 비교 검토하였다.

• 지식경영연구
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• 제11권4호
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• pp.41-66
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• 2010

This research examines the effect of the relatedness and the gap between Resources and mechanisms on effectiveness of inter-organizational knowledge transfer. According to the literature, there has been a competing theory between two claims; one is that inter-organizational knowledge transfer will be more effective due to the reduction of the transaction cost as the relatedness increases. And the other is that the mutual complementarity of different organizational characteristics will increase synergy. In total, the relatedness and the gap of the Resource and mechanism makes the inverted U-shaped relationship with the inter-organizational knowledge transfer. As the result of empirical analysis about 109 Korean-based Joint Ventures entered country, it shows that the relatedness of parent company's production Resources, learning mechanisms, and coordination mechanisms made the inverted U-shaped relations with the inter-organizational knowledge transfer and the gap of production Resources and adjustment mechanism formed the same relationship. However, the U-shaped relationship has been established in the relatedness of market Resources, but the gap of market Resources and the learning mechanism was not statistically significant. Through this study, I can draw a best conclusion that the inter-organizational knowledge transfer will be more effective when the relatedness and the gap of management resources and mechanisms is in optimal level. However, when it comes to market Resources, it can be inferred that the result could be the opposite because the partner country's market environment would be different.

• 한국항공운항학회지
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• 제26권4호
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• pp.64-75
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• 2018

A status of air traffic controller is a government officer and air traffic controllers who work at airport are divided by duty rating and work experience. Abiding by law, rules and regulation, air traffic controllers are working together based on mutual trust. This paper's theoretical background is based on cultural bias theory. The theory divide people group into four groups according to cultural bias such as fatalism, hierarchy, individualism and egalitarianism. A research model was designed how such four cultural bias could affect air traffic controller's risk response in case of emergency or abnormal situation during their work. Depend on empirical research, it was found that air traffic controllers perceived they had been more biased to fatalism than hierarchy. The characteristics of fatalism group are as follows: first of all, they follow rigid rules and regulation. However, they have less self-efficacy compared to other government officers. According to structural equation model, air traffic controller's fatalism had a significant negative effect on organizational royalty. Their royalty, however, had a very significant positive effect on planning response and immediate response.

• Bulletin of the Korean Chemical Society
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• 제5권6호
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• pp.249-253
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• 1984

Mutual diffusion coefficients of choline chloride were determined by using the diaphragm cell method in aqueous solutions of chondroitin sulfate A at $25^{\circ}C$. The diffusion coefficients of choline chloride in 0.1g/100ml, 0.5g/100ml and 1g/100ml respectively of chondroitin sulfate solutions were compared with those of binary systems of water-choline chloride. At low concentrations, the diffusion coefficients of the choline chloride in the presence of chondroitin sulfate were significantly smaller than the values obtained in the absence of chondroitin sulfate, indicating a strong interaction between these solutes. The effect of this interaction on the diffusion of choline ion is largest at higher chondroitin sulfate concentrations and at lower choline chloride concentrations. The influence of chondroitin sulfate is overcome at higher choline chloride concentrations. Self-diffusion coefficients of choline ion in the presence of chondroitin sulfate are also obtained. Excellent agreements were obtained between the experimental data and the calculated values obtained by using the Manning's equations. These observations suggest that the interaction between choline chloride and chondroitin sulfate involves primarily a long range electrostatic effect and there is no appreciable "condensation" or binding of choline ion to the chondroitin sulfate.