저온 증착된 게이트 절연막의 안정성 향상을 위한 플라즈마 처리

최우진,장경수,백경현,안시현,박철민,조재현,이준신 한국진공학회 2011 한국진공학회 학술발표회초록집 Vol.41 No.-

산성폐수에 의해 오염된 지표수의 오염도 평가에 관한 연구

崔佑鎭 水原大學校 1997 論文集 Vol.15 No.-

Acid mine drainage (AMD) is a major environmental problem throughout the world, adversely affecting both surface waters and groundwaters. It is caused by the oxidation and hydrolysis of metal sulfides in water-permeable strata, or in mined spoil dumped on the surface. This results in the formation of several soluble hydrous iron sulphates, the production of acidity and the subsequent leaching of metals. Temporal and spatial comparisons of acid mine drainage contaminated waters are difficult because of the complex physico-chemical nature of the pollutant. In the present study, an acid mine drainage index has been developed and evaluated for the assessment of surface waters. AMD index is calculated using a modified arithmetic weighted index using seven parameters which are most indicative of AMD contamination, i.e. pH value, sulphate, iron, zinc, aluminum, copper and manganese. Weighting is used to express the relative indicator value of each parameter. The proposed AMD index is used to quantify contamination from acid mine drainage over ten different old mine sites and assess the degree of impact on surface waters.

준지도 학습 머신러닝을 이용한 해상 풍력용 설비안전 진단 시스템의 개발

최우진 한국풍력에너지학회 2022 풍력에너지저널 Vol.13 No.3

In this paper, a semi-supervised machine learning technique applied to actual field vibration data acquired from Jeju-do wind turbines for predictive diagnosis of abnormal conditions of offshore wind turbines is introduced. Semi-supervised machine learning, which combines un-supervised learning with supervised learning, can be used to perform anomaly detection in situations where sufficient fault data cannot be obtained. The signal processing results using the spectrogram of the original signal were shown, and external data were used to overcome the problem that disturbance reactions easily occurred due to the imbalance between the number of normal and abnormal data. Out of distribution (OOD), which uses external data, is a technology that is regarded as abnormal data that is unlikely to occur in reality, but we were able to use it by expanding it. By rearranging the distribution of data in this way, classification can be performed more robustly. Specifically, by observing the trends of the abnormal score and the change in the feature of the representation layer, continuous learning was performed through a mixture of existing and new data.

녹색성장과 시멘트산업의 미래

최우진,Choe, U-Jin 한국시멘트협회 2010 시멘트 Vol.188 No.-

정밀 각도 검출을 위한 레졸버의 응용 ( Application of the Resolver for the Accurate Angle Positioning System )

최우진,이학용,김진형,배정철 대한전자공학회 1997 대한전자공학회 학술대회 Vol.1997 No.1

퇴행성 요추부 질환에 대한 치료에서 척추 고정술과 동반된 인접부 극돌기간 기구 삽입술의 유용성에 대한 예비 보고

최우진,장상근,김동천 대한척추신경외과학회 2009 Neurospine Vol.6 No.3

Objective: Posterior lumbar or lumbosacral spinal fusion in degenerative lumbar disease has the problems of adjacent level disease as well as surgical complications. An interspinous device used for dynamic stabilization can also be applied to the adjacent segment for spinal fusion to reduce the severity of these problems. The authors reviewed the adjacent interspinous stabilization using an interspinous spacer (CoflexTM paradigm spine, Germany) combined with posterior lumbar or lumbosacral spinal fusion in degenerative lumbar disease. Method: From January 2007 to July 2008, ten patients with degenerative lumbar disease underwent posterior lumbar or lumbosacral spinal fusion with adjacent interspinous stabilization using CoflexTM. The indications for this type were adjacent segmental disc protrusion, adjacent segmental degenerative changes or high surgical risk groups, such as elderly patients or osteoporotic patients undergoing multiple leveled fusions. CoflexTM was inserted into the adjacent segmental interspinous space. The control group consisted of fifteen patients, who underwent posterior lumbar or lumbosacral spinal fusion without interspinous stabilization. The radiological parameters and clinical outcomes were compared. All patients were followed-up for more than twelve months. Results: The visual analogue scale (VAS) in both groups postoperatively and at the twelve month follow-up were improved. In the CoflexTM group, the postoperative and twelve month follow-up X-ray showed no significant change in posterior disc height, interpedicular height, segmental lordotic angle, flextion-extension angulation and translation and no significant segmental instability. The control group showed a higher level of segmental lordotic angle, translation and a lower posterior disc height, interpedicular height, flextion-extension angulation and three patients showed adjacent segmental instability. Conclusion: CoflexTM can be used to stabilize the adjacent segment of spinal fusion in degenerative lumbar disease and might be effective in preventing adjacent segmental degeneration. However, further study will be needed to confirm this observation. Objective: Posterior lumbar or lumbosacral spinal fusion in degenerative lumbar disease has the problems of adjacent level disease as well as surgical complications. An interspinous device used for dynamic stabilization can also be applied to the adjacent segment for spinal fusion to reduce the severity of these problems. The authors reviewed the adjacent interspinous stabilization using an interspinous spacer (CoflexTM paradigm spine, Germany) combined with posterior lumbar or lumbosacral spinal fusion in degenerative lumbar disease. Method: From January 2007 to July 2008, ten patients with degenerative lumbar disease underwent posterior lumbar or lumbosacral spinal fusion with adjacent interspinous stabilization using CoflexTM. The indications for this type were adjacent segmental disc protrusion, adjacent segmental degenerative changes or high surgical risk groups, such as elderly patients or osteoporotic patients undergoing multiple leveled fusions. CoflexTM was inserted into the adjacent segmental interspinous space. The control group consisted of fifteen patients, who underwent posterior lumbar or lumbosacral spinal fusion without interspinous stabilization. The radiological parameters and clinical outcomes were compared. All patients were followed-up for more than twelve months. Results: The visual analogue scale (VAS) in both groups postoperatively and at the twelve month follow-up were improved. In the CoflexTM group, the postoperative and twelve month follow-up X-ray showed no significant change in posterior disc height, interpedicular height, segmental lordotic angle, flextion-extension angulation and translation and no significant segmental instability. The control group showed a higher level of segmental lordotic angle, translation and a lower posterior disc height, interpedicular height, flextion-extension angulation and three patients showed adjacent segmental instability. Conclusion: CoflexTM can be used to stabilize the adjacent segment of spinal fusion in degenerative lumbar disease and might be effective in preventing adjacent segmental degeneration. However, further study will be needed to confirm this observation.

PMIPv4 기반 WiBro-HSDPA 이종망간 Seamless 핸드오버기술 개발

최우진,김성진,유흥렬,이성춘,Choe, U-Jin,Kim, Seong-Jin,Yu, Heung-Ryeol,Lee, Seong-Chun 한국통신학회 2009 정보와 통신 Vol.26 No.2

본 논문에서는 KT 인프라연구소에서 개발한 PMIPv4 기반 WiBro-HSDPA 이종망간 Seamless 핸드오버 기술을 소개한다. 개발된 핸드오버 기술은 WiBro-HSDPA 이종망간 Context 정보전달에 의한 빠른 핸드오버 절차와 네트워크 계층에서의 소프트핸드오버 기술을 접목하여 이종망간 핸드오버 시 패킷 손실이 없도록 설계 및 구현하으며, 상용 WCDMA/HSDPA와 WiBro 시스템으로 구성도니 KT-KTF 연동 테스트베드를 이용하여 검증하였다.

PMIPv 기반 WiBro-HSDPA 이종망간 Seamless 핸드오버기술 개발

최우진,김성진,유흥렬,이성춘 한국통신학회 2009 정보와 통신 Vol.26 No.2

본 논문에서는 KT 인프라연구소에서 개발한 PMIPv4 기반 WiBro-HSDPA 이종망간 Seamless 핸드오버 기술을 소개한다. 개발된 핸드오버 기술은 WiBro-HSDPA이종망간 Context 정보전달에 의한 빠른 핸드오버 절차와 네트워크 계층에서의 소프트핸드오버 기술을 접목하여 이종망간 핸드오버 시 패킷 손실이 없도록 설계 및 구현하으며, 상용 WCDMA/HSDPA와 WiBro 시스템으로 구성된 KT-KTF 연동 테스트베드를 이용하여 검증하였다.

LTE 이동통신의 이해

최우진,김현표 한국통신학회 2015 정보와 통신 Vol.32 No.9_S1

시스템管理의 理論的 考察과 實證的 適用

崔宇進 尙志大學校産業經營硏究所 1992 産業經營硏究 Vol.1 No.-