• 대한전기학회:학술대회논문집
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• 대한전기학회 1991년도 추계학술대회 논문집 학회본부
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• pp.329-332
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• 1991

In this studies, variation of the sintering temperature with a single round type piezoelectric actuator of PZT 401 powder [UPI CO.] were fabricated. The piezoelectric properties were investigated as specimens with sintering temperature $1000^{\circ}C,\;1100^{\circ}C,\;1200^{\circ}C,\;1270^{\circ}C,\;1300^{\circ}C$. The strain was measured with respect to the variation of the electric field(500V-1000V), time, temperature($18^{\circ}C-40^{\circ}C$) and humidity(35%-93%).

• 아동학회지
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• 제23권5호
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• pp.1-17
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• 2002

The influence on children's analogical problem solving of structural highlighting during encoding and retrieval of sources was studied with 379 9-year-old participants. Performance on the first 2 of 4 tests determined the analogical level of each child. For the remaining 2 tests, the child was assigned to 1 of 12 different structural highlighting conditions, including 4 encoding conditions (reading, line, self-line, and self-explain) and 3 retrieval conditions (reminding, cued, and thematic comparison). Results showed that retrieval conditions, not encoding conditions, improved the analogical ability of the child. Children initially low in analogical ability improved in cued retrieval conditions; children initially high in analogical ability improved both in thematically compared and in cued retrieval conditions. Practical implications of the results were discussed.

• 응용통계연구
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• 제14권1호
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• pp.121-135
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• 2001

본 논문에서는 이원오차성분을 가지는 패널회귀모형에서 미래시점에 대한 다양한 예측량들을 유도하고, 예측량들의 효율성을 모의실험을 통하여 비교하였다. 모의실험 결과, FGLS추정량을 이용한 예측량들은 참 GLS를 이용한 예측량과 효율성에서 서로 큰차이를 보이지 않았다. 또한 계산상 매우 복잡한 ML과 REML을 이용한 예측량과도 거의 비슷한 효율성을 보여주었다.

• 한국가구학회지
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• 제21권4호
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• pp.293-303
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• 2010

With changing systems of wealth creation around the 21st century, crafts(traditional and industrial crafts) are affected by the trend of changes or lead the trend, that is to say, a turning point of paradigm has come. Values of crafts give the value of users, and the tradition and modern coexists in the trend of times changing from the tradition to the modern so crafts artists’ works are diversified and used in design industries. Based on a place of expression showing various beauty of crafts, identity of design is established through ‘Craft Consilience’ of intangible cultural assets, master craftsman, crafts artists, crafts industries, and crafts departments. As master craftsman and furniture designers meet together to mix master craftsman’s idea with designers’ idea, the new Korean crafts furniture is suggested.

• 한국도서관정보학회지
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• 제32권4호
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• pp.1-23
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• 2001

일제의 도서관정책은 한국인의 독립운동으로 전개된 민족 계몽을 위한 도서관활동을 저지 하고, 관 주도의 도서관을 통한 조선인에 대한 일본문화의 식 민화였다. 대구부립도서관은 일제 가 관 주도로 설립한 한국 최초의 부립도서관이라는 점에서 설립 배경과 활동을 식민지 정책 과 연계시켜 조사, 분석하여 일제의 도서관정책의 허구성과 조선에 대한 식민지 지배구조를 확인하였다. 본 연구는 한국 도서관사연구, 일제의 식민지정책연구 그리고 대구의 도서관사연 구에 참고자료로 활용될 것이다

• 한국작물학회:학술대회논문집
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• 한국작물학회 2006년도 한국약용작물학회 공동춘계학술발표회
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• pp.174-175
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• 2006

• 아동학회지
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• 제23권1호
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• pp.55-70
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• 2002

The influence of peer collaboration on children's analogical abilities was studied with 120 9-year-old participants. After the pre-test, which determined the analogical level of the children, each child was assigned to 1 of 4 different learning conditions: cued/non-cued peer collaborative learning, or cued/non-cued individual learning conditions. The post-test showed changes in their analogical abilities. That is, results showed that cued peer collaborative learned improved the analogical abilities of the children, but the pattern of improvement was different by prior level of analogical abilities. We explained improvement in analogical ability by the context effect of peer collaborative learning and by the interactive effect of context with basic cognitive abilities of the children. We suggested implications of the present results for educational practice.

• 아동학회지
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• 제26권6호
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• pp.173-187
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• 2005

This study examined relations between infants' strategies for emotional regulation and maternal responsiveness. Fifty 24-month-olds were observed for six kinds of emotional regulation strategy during four negative emotion-eliciting tasks; their mothers were observed for five styles of maternal responsiveness during toy-centered free play. Infants used different strategies according to the kinds of negative emotioneliciting tasks; their strategies correlated with maternal responsive styles. In the anger-eliciting tasks, infants used "distraction" and "self soothing." In the fear-eliciting tasks, they used "avoidance" and "problem solving." Infants who received more negative feedback from their mothers used the "irritation" strategy. Infants who got received more positive feedback from their mother used the "getting reference" strategy.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2004년도 추계학술발표회 논문집
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• pp.137-142
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• 2004

Recently. the number of the use of Digital Photogrammetry is increasing, and photogrammetry instruments are developing rapidly and the pression is improving continuously. In this study, using the Rollei d7 metric that is a measurement digital camera which has capacity of keeping numerial value by itself and easy carrying, we analyze the 3 dimensional hydraulic experiment model. First, we calculated RMSE by carrying out bundle adjustment. Second, we try to find a effective 3D DEM with the Kriging Interpolation, Third make a comparative study the DEM of the Triangulation with the DEM of the close-range digital photogrammetry.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1995년도 가을 학술발표회 논문집
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• pp.50-57
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• 1995

Cylindrical space frame which have a mechanic property, a functional property, a aesthetic prioerty and so on, occupies one part of sin structures and after this, the using parts will be extended. But because this structure is made of network by combination of line elements there are many nodes the structural the structural behavior is very complicated and there can be a overall collapse of structure by buckling phenomenon if the external force reaches a limitation. In design for this structure, we must determinate layer by considering above mentioned property first of all. Therefore this study aimed at the comparison and the investigation of mechanical characteristics of single-layer and double-layer cylindrical space frame on views of behavior and buckling by use of rise ratio.