• The korean journal of orthodontics
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• v.29 no.6 s.77
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• pp.649-661
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• 1999

The goals of this study were 1) to present pre-surgical naso-alveolar molding (PNAM) appliance for bilateral cleft lip and palate treatment and 2) to evaluate the effects of the PNAM appliance on the alveolar molding of the premaxilla and the lateral segments. Subjects consisted of 8 bilateral cleft lip and palate infants (7 males and 1 female, mean age at first visit = 61.6 days after birth) who were treated with PNAM appliances in Department of Orthodontics, Seoul National University Dental Hospital. Average alveolar cleft gap between the premaxilla and the lateral segment was $8.09{\pm}5.03mm$ and average duration of alveolar molding treatment was $8.8{\pm}3.1$ weeks. These patients' models were obtained at initial visit (T0) and after alveolar molding (T1). 20 linear and 14 angular variables were measured by using photometry and digital caliper, All statistical analyses were performed by Microsoft Excel 97 program. Paired t-test was used to discriminate the effect of alveolar molding by PNAM appliance. 1. Closure of the alveolar cleft gap in bilateral cleft cases by molding therapy was completed successfully, 2. Alveolar molding inhibited outward growth of lateral segments and produced inward bending of lateral segments. 3. By bending the anterior part of the vomer, the premaxilla could be rotated and moved. posteriorly via alveolar molding. Conclusion This appliance can be applied to bilateral cleft lip and palate infants with satisfactory results before cheiloplasty.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.05a
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• pp.688-694
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• 2002

As a tool for strain measurement to work with screw driven or hydraulic material test systems, in which mechanical vibration is inherent, SSDG(Speckle Strain/Displacement Gage), ESP(Electronic Speckle Photography) and its 3-dimension version SDSP are investigated for the theory and practical appliance. Through tension test of steel strips, their validity and shortcomings are examined. As the results, it has been shown that, although SSDG and ESP provide direct measurement of in-plane strain in one direction, they are so sensitive to the out-plane displacement. On the other hand, SDSP which is aided with DIC (Digital Image Correlation) technique to trace the movement of the speckles provides not only in-plane 2-dimensional displacement field, but also out-of-plane displacement simultaneously. However, because the DIC is time-consuming, not automated yet and it needs post-processing to evaluate strain from the displacement field, SDSP appears to be not adequate as a real time sensor.

• Journal of the Korean Society for Precision Engineering
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• v.20 no.6
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• pp.47-54
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• 2003

As a tool for strain measurement to work with screw driven or hydraulic material test systems, in which mechanical vibration is inherent, SSDG (Speckle Strain/Displacement Gage), ESP (Electronic Speckle Photography) and its 3-dimension version SDSP are evaluated for the theory and practical appliance. Through tension test of steel strips, their validity and shortcomings are examined. As the results, it has been shown that, although SSDG and ESP provide direct measurement of in-plane strain in one direction, they are so sensitive to the out-plane displacement. On the other hand, SDSP which is aided with DIC (Digital Image Correlation) technique to trace the movement of the speckles provides not only in-plane 2-dimensional displacement field, but also out-of-plane displacement simultaneously. However, because the DIC is time-consuming, not automated yet and it needs post-processing to evaluate strain from the displacement field, SDSP appears to be not adequate as a real time sensor.

• Proceedings of the SAREK Conference
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• 2006.11a
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• pp.44-44
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• 2006

• Proceedings of the Korea Society of Design Studies Conference
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• 2000.11a
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• pp.122-123
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• 2000

제품이 디지털화 되면서 점차 제품의 사용범위 및 역할이 중대 되는 등의 사용자 환경변화가 급속하게 이루어지고 있다. 특히 가전기기에 있어서는 컴퓨터와 인터넷의 역할이 가전기기 내로 도입됨으로 인해, 단순히 제품 자체의 사용성을 넘어 편리함과 오락성을 가질 뿐만 아니라 정보를 공유하고 전달하는 등의, 가전제품의 네트워크화에 대한 새로운 가능성을 보여주고 있다.(중략)

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.894-895
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• 2008

정보가전기기의 전력저감을 위한 기술개발로서 Home-net 기반 지능형 초절전 전원기술 개발을 목표로 하며, 관련 설계기술 및 내부블록을 설계하여 초절전 전원칩을 제작하고, 지능형 SMPS를 위한 digital control IC와 연결하여 동작 특성을 평가한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.385-388
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• 2005

기존의 소프트웨어 신뢰성 측정 방법으로는 하드웨어와 소프트웨어가 유기적으로 얽혀있는 정보 가전기기 임베디드 시스템에서는 적용하기 어려운 점이 있다. 이런 문제점을 해결하기 위해서는 임베디드 소프트웨어 신뢰성 측정 시 소프트웨어에 따른 하드웨어 부분을 포함하는 방법으로 신뢰성 측정이 이루어져야 한다. 본 논문에서는 정보 가전기기의 임베디드 소프트웨어 개발에서의 하드웨어와 결합된 신뢰성 측정 방법을 제시하고 세탁기를 기준으로 성능평가를 통해 임베디드 소프트웨어 신뢰성을 확보하였다.

• Proceedings of the KAIS Fall Conference
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• 2008.11a
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• pp.488-491
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• 2008

본 연구에서는 가전제품 서비스 엔지니어의 직무만족도가 계속근무의사에 어떠한 영향을 미치는 지를 조사 분석하였다. 또한 직무만족도에 영향을 미치는 요인이 무엇인지를 조사 분석하였다. 그 결과 엔지니어 개인적 특성에 있어서는 성격이 직무만족도에 영향을 미치는 요인으로 파악되었으며, 조직적 특성에 있어서는 사회적 지지와 급여 및 복리후생이 영향을 미치는 요인으로 분석되었다. 직무 자체의 특성에 있어서는 업무 적정성이 직무만족도에 영향을 미치는 것으로 파악되었다. 또한 이러한 직무만족도는 계속근무의사에 의미있는 영향을 미치는 것으로 조사 분석되었다.

• Proceedings of the SAREK Conference
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• 2003.07a
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• pp.241-241
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• 2003

• Proceedings of the SAREK Conference
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• 2003.07a
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• pp.119-119
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• 2003