• Proceedings of the KIEE Conference
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• 1999.07b
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• pp.900-902
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• 1999

본 연구에서는 유전알고리즘을 이용한 인간의 팔운동 근전신호의 기능분리에 관한 방법을 제시하였다. 6가지 기능의 팔운동 시에 근전신호의 특성을 유전알고리즘을 이용하여 기능분리 하였다.

• Proceedings of the Optical Society of Korea Conference
• /
• 1991.06a
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• pp.115-120
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• 1991

홑곁모양(Single Mode) 광섬유를 써서 조절되는 곬진 짝짓게를 제작해서 이를 이용해 광섬유 공진고리 간섭계를 구성하였다. 광원으로 He-Ne 레이저의 빛살(0.6328$mu extrm{m}$)를 간섭계의 팔(Arm)에 입사시키고, 광섬유 고리에는 삼각파를 함수 발생기로 P. Z. T를 써서 가할 때 출력 끝에서 나오는 빛살의 공진 특성 및 주파수 분포를 조사하였다. 또한, 빛살이 입사되는 광섬유 팔에 편극 조절기를 부착해서 편극 변화에 따른 공진 현상의 변화를 조사하였다.

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2000.04a
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• pp.231-232
• /
• 2000

자동차 보급의 증가에 의한 심각한 대기오염으로 인하여 국내 제작차(휘발유 자동차)의 경우 1987년부터 자동차 배기가스 정화용 촉매 전환기의 장착을 의무화하였다(환경부, 1998). 자동차용 촉매로 많이 사용되는 귀금속은 백금(Pt), 팔라듐(Pd), 로듐(Rh)이며, 수요비율은 백금이 전체 수요의 39%, 팔라듐이 16%, 로듐이 96%로 자동차용으로 많은 귀금속이 사용되고 있음을 알 수 있다. (중략)

• Journal of the Korean Chemical Society
• /
• v.52 no.6
• /
• pp.724-726
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• 2008

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2014.07a
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• pp.203-207
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• 2014

오픈 소스 소프트웨어 콘텐츠 관리 시스템은 드루팔(Drupal)은 백악관을 비롯해 대규모 사이트에 적용되어 사용되고 있으며, 매우 수준 높은 보안성을 유지하고 있다. 그러나 국내에서는 잘 알려지지 않아 적용 사이트가 매우 드문 상황이다. 본 논문에서는 이러한 두루팔의 기여모듈과 코어모듈 등 구조 분석하고, 실제 웹 사이트를 구축해 두루팔의 실효성을 보인다.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2015.05a
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• pp.190-190
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• 2015

본 연구는 에틸렌디아민을 착체욕에서 팔라듐-니켈 합금도금을 형성하였다. 그리고 전류밀도 $1.0{\sim}20A/dm^2$ 변화를 통해 도금층 내의 니켈함량을 10.4 ~ 27.7 wt% 변화시켰다. 이를 통해 팔라듐-니켈 합금도금의 경도, 접촉저항, 표면 및 단면 조직에 미치는 도금층 내의 니켈함량의 영향에 대하여 조사하였다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2020.11a
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• pp.916-919
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• 2020

이 로봇팔은 테이크 아웃 컵을 플라스틱, 종이, 내용물로 나누어 자동으로 분리수거 해주는 기능을 갖고 있다. 또한 테이크 아웃 컵 뿐만아니라 플라스틱, 종이, 캔으로 된 컵들도 분리수가 할 수 있게 설계되었다.

• The Korean Journal of Nuclear Medicine Technology
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• v.14 no.2
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• pp.21-25
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• 2010

Purpose: For better PET imaging with accuracy the transmission scanning is inevitably required for attenuation correction. The attenuation is affected by condition of acquisition and patient position, consequently quantitative accuracy may be decreased in emission scan imaging. In this paper, the present study aims at providing the measurement for attenuation varying with the positions of the patient's arm in whole body PET/CT, further performing the comparative analysis over its SUV changes. Materials and Methods: NEMA 1994 PET phantom was filled with $^{18}F$-FDG and the concentration ratio of insert cylinder and background water fit to 4:1. Phantom images were acquired through emission scanning for 4min after conducting transmission scanning by using CT. In an attempt to acquire image at the state that the arm of the patient was positioned at the lower of ahead, image was acquired in away that two pieces of Teflon inserts were used additionally by fixing phantoms at both sides of phantom. The acquired imaged at a were reconstructed by applying the iterative reconstruction method (iteration: 2, subset: 28) as well as attenuation correction using the CT, and then VOI was drawn on each image plane so as to measure CT number and SUV and comparatively analyze axial uniformity (A.U=Standard deviation/Average SUV) of PET images. Results: It was found from the above phantom test that, when comparing two cases of whether Teflon insert was fixed or removed, the CT number of cylinder increased from -5.76 HU to 0 HU, while SUV decreased from 24.64 to 24.29 and A.U from 0.064 to 0.052. And the CT number of background water was identified to increase from -6.14 HU to -0.43 HU, whereas SUV decreased from 6.3 to 5.6 and A.U also decreased from 0.12 to 0.10. In addition, as for the patient image, CT number was verified to increase from 53.09 HU to 58.31 HU and SUV decreased from 24.96 to 21.81 when the patient's arm was positioned over the head rather than when it was lowered. Conclusion: When arms up protocol was applied, the SUV of phantom and patient image was decreased by 1.4% and 9.2% respectively. With the present study it was concluded that in case of PET/CT scanning against the whole body of a patient the position of patient's arm was not so much significant. Especially, the scanning under the condition that the arm is raised over to the head gives rise to more probability that the patient is likely to move due to long scanning time that causes the increase of uptake of $^{18}F$-FDG of brown fat at the shoulder part together with increased pain imposing to the shoulder and discomfort to a patient. As regarding consideration all of such factors, it could be rationally drawn that PET/CT scanning could be made with the arm of the subject lowered.

• KAPE Magazine
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• s.102
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• pp.18-19
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• 2005

• Korean Architects
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• no.1 s.321
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• pp.64-64
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• 1996