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노정호 ( Jeong Ho Noh ),민병현 ( Byoung Hyun Min ) 대한슬관절학회 2002 대한슬관절학회지 Vol.14 No.2
Purpose: The purpose was trying to clarify utility of allogenous bone graft on open type high tibial osteotomy, among the method of treatment of osteoarthritis with genu varum deformity. Materials and Methods: Working with eight patients who have osteoarthritis with genu varum deformity, performed the open type high tibial osteotomy, and after transplanting allogenous bone graft, fixed using L-shaped plate. Before and after the operation, measured the degree of correction of genu varum through radiography of anterior and posterior of weigh load, understudied degree of union by testing bone histology during removal of implant, and evaluated functional factor as well as improvement of patients using Lysholm`s knee score and HSS knee score. Results: According to radiography of anterior and posterior of weigh load, the average of varus angle was 5.3±3.2˚ before operation, the average of correction angle was 16.1±4.1˚ after operation and the average of valgus angle was 10.7±4.3˚. By radiography of anterior and posterior of weigh load and lateral taken during the continual observation, complete bone union was seen. It got result that bone histology of transplanted part was composed of osteologic tissue and ration of live bone and dead bone was 3.3:1, which live bone was 76.7±8% by image analyzer(Pro Plus? system) during the implant removal. The average of correction loss angle was 1.5±1.0˚ After 15. months, average period of observation, average of Lysholm`s score and HSS knee score were increased from 66.2±8.3 to 75.7±9.1 and from 55.2±9.0 to 79.0±7.5 respectively. Conclusion: The method that using a transplantation of allogenous bone graft on open type high tibial osteotomy, can be a fine surgical technique because it gains a perfect union, has an inconsiderable loss of correction angle and precision of correction angle, and can be contributed to the improvement of functional knee joint.
디지털회로의 결함 검출률을 높이기 위한 K-등분 회로분할기법
노정호(Jeong Ho Noh),김상진(Sang Jin Kim),이창희(Chang Hee Lee),윤태진(Tae Jin Yun),안광선(Gwang Seon Ahn) 한국정보과학회 1998 정보과학회논문지 : 시스템 및 이론 Vol.25 No.5
본 논문에서는 회로 분할시 검출불가 결함을 가진 신호선을 중심으로 분할함으로써 결합 검출률을 높이는 MPT 분할알고리즘을 제안한다. 기존의 노드이동 기반의 분할 알고리즘은 cut-set의 크기를 줄이는데 주안점을 두고 있다. 이에 비해, 제안된 알고리즘은 노드이동시 검출 불가능한 결함을 검출 가능하게 할 수 있는 노드를 선택하도록 하여 결함 검출률이 향상되도록 하였다. 이는 회로의 절단에 의하여 검출 불가능한 결함이 제어와 관찰 가능하게 됨을 이용한 것이다. MPT 알고리즘의 성능은 ISCAS85 벤치마크 데이타로 실험하여 평가한다. Partitioning problem of large digital circuit has been studied in real world. Most of logic circuits include UDF(undetectable faults) caused by the pauticale structures such as redundant, fan-out-reconvergent, and symmetrical features. In this paper, an algorithm on multi way partition is proposed to enhance the fault coverage by locating undetectable faults on cut-set during circuit partitioning. The algorithm enables UDF to be controllable and observable by adjusting the cut-gain and fault-gain values. The proposed algorithm is evaluated to show its effective wess using ISCAS85 beuch make circuits.
論文(논문) : 정밀좌표변환 및 중력가속도 계산 알고리듬 분석
김정래 ( Jeong Rae Kim ),노정호 ( Jeong Ho Noh ) 한국항공운항학회 2011 한국항공운항학회지 Vol.19 No.4
Inertial navigation systems requires gravity model to compute gravity acceleration and its trajectory accuracy depends on the gravity model accuracy especially for a long range flight. The gravity model accuracy is important for satellite orbit prediction as well. The precision gravity model requires a precision coordinate transformation between inertial and Earth fixed coordinates. Precision gravity acceleration algorithms with a coordinate transform are studied and a computer program is developed. The effects of individual model components on trajectory error are analyzed.
김정래 ( Jeong Rae Kim ),노정호 ( Jeong Ho Noh ),이형근 ( Hyung Keun Lee ) 한국항공운항학회 2012 한국항공운항학회지 Vol.20 No.3
Global navigation satellite systems (GNSS) use dual frequency signals to remove ionosphere delay effect. GNSS receivers have their own biases, called inter-frequency bias (IFB) between dual frequencies due to differential signal delays in receiving each frequency codes. The IFB degrades pseudo-range and ionosphere delay accuracies, and they must be accurately estimated. Simultaneous estimation of ionosphere map and IFB is applied in order to analyze the IFB estimation accuracy and variability. GPS network data in Korea is used to compute each receiver`s IFB. Accuracy changes due to ionosphere model changes is analyzed and the effect of external GNSS satellite IFB on the receiver IFB is analyzed.