• 한국작물학회:학술대회논문집
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• 한국작물학회 2004년도 춘계 학술대회지
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• pp.158-159
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• 2004

• 한국작물학회:학술대회논문집
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• 한국작물학회 2004년도 춘계 학술대회지
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• pp.168-169
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• 2004

• 한국분말재료학회지
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• 제22권6호
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• pp.420-425
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• 2015

Rare-earth zirconates, such as lanthanum zirconates and gadolinium zirconates, have been intensively investigated due to their excellent properties of low thermal conductivity as well as chemical stability at high temperature, which can make these materials ones of the most promising candidates for next-generation thermal barrier coating applications. In this study, three compositions, lanthanum/gadolinium zirconates with reduced rare-earth contents from stoichiometric $RE_2Zr_2O_7$ compositions, are fabricated via solid state reaction as well as sintering at $1600^{\circ}C$ for 4 hrs. The phase formation, microstructure, and thermo-physical properties of three oxide ceramics are examined. In particular, each oxide ceramics exhibits composite structures between pyrochlore and fluorite phases. The potential of lanthanum/gadolinium zirconate ceramics for TBC applications is also discussed.

• 한국환경성돌연변이발암원학회:학술대회논문집
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• 한국환경성돌연변이발암원학회 2001년도 Korean Environmental Mutagen Society
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• pp.107-107
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• 2001

• 공학교육연구
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• 제19권1호
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• pp.11-20
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• 2016

Team activities in engineering curriculum play the major role in nourishing students with problem-solving and team-working capabilities. Educators endeavor to guide students to achieve success experiences through team activities. The sense of success depends on how the students think and feel about team activities. In this study, we investigated the students thoughts on team activity in various aspects. We provided freshmen and juniors with a set of questionnaire and gathered answers, from which we tried to elicit implication that we may apply for coaching their team activities. The analysis result shows that the perception level of freshmen on team activities is less mature in a sense that the freshmen's view is more neutral than that of juniors. Regardless of the grade, they show that they put more emphasis on the team atmosphere than on the team performance. Especially the freshmen are more sensitive to the relationship between the team members than the juniors. The juniors concern more about whether they prepare well enough for the team activities or not. Both of the grades prefer self-regulation in team formation and think the leadership is essential in performing team activities. However, they both hesitate to take a role as a leader. We expect the research result will provide novel ideas for coaching students to obtain valuable experiences on team activities.

• 디지털융복합연구
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• 제15권2호
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• pp.335-345
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• 2017

교수자가 학생들의 자율적인 팀 결성의 행동적 특성을 파악하는 것은 교과에서 팀 활동을 효과적으로 지도하기 위해 필요하다. 본 연구에서는 에이전트 기반의 컴퓨터 시뮬레이션을 통해 학생들의 팀 결성 행동 특성을 모사할 수 있는 컴퓨터 모형을 개발하였다. 실험을 통한 검증 결과 개발된 모형은 실제 학생들의 행동적 특성을 모사할 수 있음이 관찰되었다. 학생의 수와 팀원을 찾는 탐색의 범위가 클수록 팀의 결성이 안정화되기까지의 시간이 줄어들며 팀원을 찾지 못한 학생의 비율 또한 줄어들지만 어느 한계를 넘어서면 시간과 비율에 있어 큰 차이가 없음을 발견하였다. 또한 융 복합 교과 등에서 구성원 간의 이질성이 증가한다면 팀 구성 시간과 팀원을 찾지 못한 학생의 비율이 급격히 증가하므로 경우에 따라 교수자가 학생들의 팀 구성에 적절하게 개입하는 것이 필요함을 알 수 있었다. 개발된 모형을 통해 모의실험 함으로써 학생들의 팀 결성의 성격과 구조를 진단하고 분석할 수 있으므로 개발된 모형은 학생들의 팀 활동을 지원하는 도구로 유용하리라 기대한다.

• 대한안전경영과학회지
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• 제8권4호
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• pp.219-238
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• 2006

Many corporations are accepting various kinds of business reform techniques to be adapted and overcome in this e-Business period. Among these techniques, team-organization is selected most in person/organization field. The introduction of team-organization is more needed and spread, so many corporations actually constructed team-organization formation form. But the result has not been active. Therefore after team-organization is introduced to improve the performance evaluation of team management, the result of team management performance should be correctly measured to find out and settle the problems of team-organization. The purpose of this research presents the development of the model of team-management performance evaluation and the method of the proper measurement based on BSC.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.385-388
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• 2009

We have investigated the effect of the device structure on the performance of polycrystalline ZnO TFT and amorphous AZTO TFT with top gate and bottom gate structure. While the mobility of both TFTs showed relatively similar value in a top and bottom gate structure, bias stability was quite different depending on the device structure. Top gate TFT showed much less Vth shift under positive bias stress compared to that of bottom gate TFT. We attributed this different behavior to the defects formation on the gate insulator induced by energetic bombardment during the active layer deposition in a bottom gate TFT. We suggest the top gate oxide TFT would show more stable behavior under the Vgs bias.

• 제어로봇시스템학회논문지
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• 제19권6호
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• pp.547-554
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• 2013

This paper proposes a novel formation algorithm of identical robots based on object tracking method using omni-directional images obtained through fisheye lenses which are mounted on the robots. Conventional formation methods of multi-robots often use stereo vision system or vision system with reflector instead of general purpose camera which has small angle of view to enlarge view angle of camera. In addition, to make up the lack of image information on the environment, robots share the information on their positions through communication. The proposed system estimates the region of robots using SURF in fisheye images that have $360^{\circ}$ of image information without merging images. The whole system controls formation of robots based on moving directions and velocities of robots which can be obtained by applying Lucas-Kanade Optical Flow Estimation for the estimated region of robots. We confirmed the reliability of the proposed formation control strategy for multi-robots through both simulation and experiment.

• KSBB Journal
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• 제30권2호
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• pp.69-76
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• 2015

The antibacterial activity of a antimicrobial (organic synthetic or organic natural material) on the bacteria (Bacillus megaterium, Arthrobacter oxydans, Micrococcus luteus, Methylobacterium aquaticum) detected in the automobiles showed 99.9% bacteria decrease rate within 30 min of being in contact with the tested bacteria culture. The MIC of the organic synthetic material based antimicrobials and the organic natural material based antimicrobial on the bacteria were 31~500 mg/mL and 8~250 mg/mL, respectively. The bacteria and biofilms were formed on the surface of aluminum after 5 ~8 days in the case of addition of the organic synthetic material based antimicrobial to the MIC values for the tested bacteria culture. On the other hand, there was no proliferation of bacteria and formation of biofilms on the surface of aluminum even after 30 days in the case of addition of the organic natural material based antimicrobial to the MIC values for the tested bacteria culture. As a result, the organic natural material based antimicrobial was confirmed to be more excellent effect of inhibition of bacterial proliferation and restraint of biofilms formation than the organic synthetic material based antimicrobial.