• The Bulletin of The Korean Astronomical Society
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• v.37 no.2
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• pp.166.2-166.2
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• 2012

국내에서 개발한 고기동 저궤도 위성이 일본 다네가시마 우주센터에서 2012년 5월 18일 발사되었다. 자세제어계는 위성의 임무수행을 완수할 수 있도록 발사 후부터 위성 수명 기간 동안 자세명령을 생성하고 제어 및 결정을 하며, 궤도 조정과 모멘텀 덤핑등의 임무를 수행한다. 이러한 임무 수행을 가능하게 하기 위해 자세제어계는 적절한 센서와 구동기 조합을 사용하여 추력기 기반 안전모드, 궤도 조정을 위한 Del-V Burn 기동 모드, 태양지향 서브모드 및 목표지향 서브모드 등을 설계했다. 고기동 위성의 초기 운용 중 자세제어계는 자세제어계 하드웨어의 초기 구동 및 점검을 수행하고 설계한 각 모드의 기능과 성능 확인을 수행하게 된다. 본 연구는 성공적으로 완료한 자세제어계 하드웨어의 초기 점검 결과를 소개하는 것이 목적이다. 초기 운용은 위성이 발사된 직후 탑재컴퓨터가 깨어나면서부터 시작되는데, 발사 후 최초 접속시 추력기 기반 안전모드에서 태양 획득 성능 및 제어 성능을 확인한 후 정상 상태 모드인 태양지향 자세로 전환하기 위해 자세제어계 하드웨어인 별 추적기, 자기토커, 반작용휠의 초기 구동 및 점검을 수행하였다. 본 연구에서는 각 하드웨어의 초기 구동 점검과 성능 및 기능 요구조건 만족에 대한 성능 분석 결과를 정리하였다.

• Korean Journal of Optics and Photonics
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• v.14 no.2
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• pp.166-168
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• 2003

By using gain saturation of semiconductor optical amplifiers (SOAs), an all-optical AND gate at 10 Gb/s has been successfully demonstrated. Firstly, Boolean (equation omitted) has been obtained using the first SOA with signal B and clock injection. Then, the all-optical AND gate is achieved using the second SOA with signals A and (equation omitted) injection.

• Journal of Veterinary Clinics
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• v.36 no.3
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• pp.166-168
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• 2019

A 22-month-old female mongrel dog weighing 4.8 kg was referred with chief complaint of bite wounds and lameness. The patient showed non-weight bearing lameness on left hindlimb and lateral instability of intertarsal joint. On radiograph, proximal intertarsal luxation between calcaneus and fourth tarsal bone was diagnosed. To imitate the long collateral and calcaneoquartal ligament, bone tunnels were drilled in the distal calcaneus and proximal fifth metatarsal bone. The figure-eight suture was placed with 0.5 mm cerclage wire through the predrilled holes. At 2 weeks after surgery, the lameness of hindlimb was still present. However, the patient had weight bearing lameness for 4 weeks after operation and was able to walk and run without lameness at 5 weeks after surgery. This case report explains the successful correction of intertarsal luxation with a single figure of eight wire suture in case of luxation to the intertarsal joint.

• Journal of Energy Engineering
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• v.24 no.4
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• pp.166-174
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• 2015

This study examined combustion characteristics by selecting the fuel which have a different physical properties compared to gasoline in order to examine the effects of vehicle performance and environment depending on the physical properties. The experiment examined the combustion characteristic in the optimum ignition timing according to the physical properties change and the lean burn by performing control about ignition timing and air-fuel ratio for each fuel, and it was also evaluated the exhaust gas according to the experiment. We used a single-cylinder engine for the experiment, and tested for gasoline properties change by selecting a fake fuel that beyond the fuel quality standards in 석대법. As a result, in the case of the selected fuel showed a difference in Octane and distillation characteristics, vapor pressure and it was also found to unstable combustion, and leads to a large amount of harmful exhaust gas.

• Advances in pediatric surgery
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• v.4 no.2
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• pp.166-171
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• 1998

Segmental dilatation of the small intestine is a rare form of the congenital intestinal anomaly. Many other combined anomalies have been reported in, but the association with colonic duplication has not been reported in the literature. We report a case of segmental dilatation of the distal ileum associated with colonic duplication. The main clinical and pathogenic aspects are discussed, and the literatures are reviewed.

• 한국벤처창업학회:학술대회논문집
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• 2006.04a
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• pp.139-166
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• 2006

This paper explored strategic types of Korean SMEs in manufacturing industries and investigated key differences among strategic types by analysing firm size, product market, technological capabilities and performances. According to previous studies, this papers categorized SMEs into four strategic types-technological innovative SMEs, multi-product SMEs, capital-intensive SMEs, and OEM-based SMEs types. Based on the empirical survey from 1,077 Korea SMEs in diverse industries, there are significant differences among strategic types on the key characteristics including product market, resource capability and performance. Finally this paper suggested implications for the studies on SMEs and managerial and policy directions to support SMEs.

• Proceedings of the KIPE Conference
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• 2004.07a
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• pp.163-166
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• 2004

The conventional fluorescent lamp dimming system using an another control line is complex and will increased the cost. Therefore, many studies have focused on the wireless communication, but it is not fit for dimming system because of the interference generated by the infra-red light of lamp or switching noises in ballast. So, we applied the power line communication on the dimming system and we proposed a new coupling circuit using the voltage controlled impedance convertor for improving the performance of the FH/SS PLC modem. The performance for the proposed modem is evaluted by the BER.

• Proceedings of the Korean Society of Medical Physics Conference
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• 2006.08a
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• pp.103-103
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• 2006

• Proceedings of the KIEE Conference
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• 1989.07a
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• pp.166-169
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• 1989

A study for the recognition of the Korean characters by a neural network is presented. To reduce the dimension of the input image data, DC components are extracted from each input image and used as input to the neural net. A multi-layer perceptron with one hidden layer was trained with back-error propagation training algorithm. Its performance is tested for 24 ${\times}$ 24 binary images of Korean characters and the results of several experiments are presented.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.166-169
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• 2004

디지털 워터마킹 기술은 이러한 저작권 보호기술의 하나로 원본 컨텐츠에 저작권자에 대한 정보를 은닉함으로써 저작권자를 확인시켜주고 불법복제나 유통여부를 가려주는 기술로 개발된 것이다. 디지털 워터마킹 기술이 필요한 정보를 은닉한다는 측면에서 정보은닉 기술의 하나이며, 이는 단순히 저작권 보호의 이외의 분야에 대해서도 옹용이 가능하다는 것을 나타낸다. 본 논문에서는 워터마킹이 무엇인지 그리고 워터마킹의 공격방법의 유형을 정리하고, 기존에 제안한 워터마킹 기법에 대해 고찰한다.