대퇴골 골종양의 치료에 있어서의 Angled Blade Plate의 역할

강창남,김태승,정웅서,Kim, Tai-Seung,Kang, Chang-Nam,Chung, Ung-Seo 대한근골격종양학회 2005 대한골관절종양학회지 Vol.11 No.2

Purpose: Bone tumor occurred in femur frequently involve proximal intertrochanteric region or distal metaphyseal region. Sometimes, the pathologic fracture can happen according to the size of tumor due to the substantial biomechanical stresses. Therefore, the prognosis can be improved biomechanically by the angled blade plate considering the anatomic configuration after the excision of tumor. Materials and Methods: Between October 1991 and April 2005, there were a total of 16 patients(17 cases) who were treated by the excision of tumor and internal fixation with the angled blade plate for bone tumor occurred in femur. After the excision of tumor, we filled the cavity by bone graft in 11 cases and bone cement in 6 cases. The internal fixation was used by angled blade plate in all cases. Result: The average follow-up time was 55.5 months(6-144 months) in 16 patients(17 cases). No metal failure occurred after the operation. Reoperation was performed in 4 cases due to tumor recurrence, and the internal fixation was firm until that. Conclusion: The angled blade plate can prevent the fracture until grafted bone incorporated to host bone, and protect fragile connection between cement and host bone. 목적: 대퇴골에서 골 종양은 주로 근위 전자부와 원위 간단부에 발생한다. 그러나 대퇴골은 체중부하와 연관하여 종양의 크기에 따라서는 병적 골절을 유발하게 된다. 그러므로 종양제거후 대퇴골의 해부학적 특성을 고려한 angled blade plate로 보완해 준다면 생역학적 측면에서 그 예후를 훨씬 개선할 수 있을 것 여겨진다. 대상 및 방법: 1991년 10월부터 2005년 4월까지, 대퇴골에 발생한 골 종양을 제거하고 Blade Plate로 보완해준 환자 16명 17예를 대상으로 하였다. 종양제거 후 11예에서 골 이식으로, 6예에서 골 세멘트로 채워 넣었으며, 모든 예에서 angled blade plate를 사용하여 내고정을 시행하였다. 결과: 평균 추시 기간은 16명 환자(17예)에서 55.5개월 이었다. 시술 후 금속에 관련된 실패는 없었다. 종양의 재발로 인하여 재수술이 4예에서 있었으며 재수술전까지 내고정은 유지되었다. 결론: angled blade plate는 종양수술 후 이식 골의 결합이 이루어질 때까지 그 부위를 골절로부터 보호하며, 골 세멘트를 사용한 경우는 골 세멘트와 골조직과의 취약한 이음새를 골절로부터 보호하였다.

무지 외반증의 중증도에 대한 전산화 영상 계측

강창남,최경진,이두연,김상덕,성일훈,Kang, Chang-Nam,Choi, Kyung-Jin,Lee, Doo-Yeon,Kim, Sang-Duk,Sung, Il-Hoon 대한족부족관절학회 2009 대한족부족관절학회지 Vol.13 No.1

Purpose: To study the reliability of intra- and interobserver reliability in angular measurement of hallux valgus deformity by assessing hallux valgus angle (HVA) and the 1st to 2nd intermetatarsal angle (1-2 IMA) through using computerized system. Materials and Methods: 20 cases of moderate to severe hallux valgus patients were included in this study. With the standing anteroposterior view of foot, the HVA and 1-2 IMA were calculated by computerized measurement system of Infinity cooperation, called ${\pi}$-view, with its software tools. Using the statistical software program, SPSS (version 12th), we interpreted the results which were measured by two independent observers. Results: In the intraobserver measurement, the HVA of observer A showed reliability ($32.5^{\circ}{\pm}6.9$ and $33.1^{\circ}{\pm}6.8$)(p<0.05). 1-2 IMA in observer A was not regarded as reliable ($16.9^{\circ}{\pm}2.8$ and $17.1^{\circ}{\pm}2.8$)(p>0.05). In the results of observer B, HVAs were measured as $35.7^{\circ}{\pm}7.6$ and $36.2^{\circ}{\pm}7.7$, and were not reliable (p>0.05). 1-2 IMA in observer B was not reliable as well ($17.0^{\circ}{\pm}0.8$ and $20.8^{\circ}{\pm}1.5$)(p>0.05). In the interobservers' measurements, the first and the second results of HVA were $3.2^{\circ}{\pm}3.6$ and $3.1^{\circ}{\pm}3.1$, reliable within the 95% confidence interval (p<0.05). 1-2 IMAs were $0.1^{\circ}{\pm}1.9$ and $3.73^{\circ}{\pm}1.3$, which were not reliable (p>0.05). Conclusion: In the angular measurement of the hallux valgus by computerized system, the HVA and 1-2 IMA showed less error range in the interobserver's results, compared with the previous studies about the manual measurement. However, our results failed to show the statistical reliability of intra- and interobserver's measuring. Therefore, even the computerized angular measurements in the severity of hallux valgus require development of the measuring methods and software tools.

H₂/H_∞ 설계사양을 만족하는 선박운동제어계 설계에 관한 연구

강창남,김영복,Kang, Chang-Nam,Kim, Young-Bok 제어로봇시스템학회 2013 제어·로봇·시스템학회 논문지 Vol.19 No.9

In this paper, the authors propose a new approach to control problem of the marine vessels which are moored or controlled by actuators. The vessel control problem in the specified area is called a DPS (Dynamic Positioning System). The main objective of this paper is to obtain more useful control design method for DPS. In this problem, a complicate fact is control allocation which is a numerical method for distributing the control signal to the controlled system. For this, many results have been given and verified by other researchers using two individual processes. It means that the controller design and control allocation design process are carried out individually. In this paper, the authors give more sophisticated design solution on this issue. In which the controller design and control allocation problem are unified by a robust controller design problem. In other word, the stability of the closed-loop system, control performance and allocation problem are unified by an LMI (Linear Matrix Inequality) constraint based on $H_2/H_{\infty}$ mixed design framework. The usefulness of proposed approach is verified by simulation with a supply vessel model and found works well.

퍼지기법에 의한 자동조타기의 제어성능개선에 관한 연구

강창남(Chang-Nam Kang) 대한전기학회 2005 대한전기학회 학술대회 논문집 Vol.2005 No.7

무어링 윈치 제어시스템 설계에 관한 연구

강창남(Chang-Nam Kang),정지현(Ji-Hyun Jeong),김영복(Young-Bok Kim) 한국동력기계공학회 2013 동력시스템공학회지 Vol.17 No.3

Ad hoc 네트워크에서 전력 제어 기법을 사용한 Dual-Channel MAC 프로토콜

강창남(Kang Chang-Nam),한도형(Han Do-Hyung),이은주(Lee Eun-Ju),좌정우(Jaw Jeong-Woo),임재윤(Lim Jea-Yun) 한국방송·미디어공학회 2007 한국방송공학회 학술발표대회 논문집 Vol.2007 No.-

Ad hoc 네트워크는 기반구조가 없는 무선네트워크이다. Ad hoc 네트워크는 재난지역, 군사지역, 홈 네트워킹 서비스, 텔레매틱스 서비스 같은 곳에서 응용될 수 있다. 최근 Ad hoc 네트워크의 처리량을 향상시키기 위해 방향성 안테나를 사용하거나 이중채널을 사용하는 MAC 프로토콜이 제안되고 있다. DUDMAC 프로토콜은 이중채널에 방향성 안테나를 사용하여 처리량 성능을 향상시킨 프로토콜이다. 본 논문에서는 DUDMAC 프로토콜에 전력 제어 기법을 적용하여 네트워크의 처리량을 향상시키는 MAC 프로토콜을 제안한다. 제안하는 MAC 프로토콜은 새로운 블로킹 알고리즘을 사용하여 공간 재사용을 향상시킨다. 제안하는 블로킹 알고리즘은 RTS 또는 CTS 수신 시 블로킹 테이블에 저장된 수신세기를 사용하여 기존의 DUDMAC의 블로킹 영역을 FULL_BLOCKING 영역과 SEMI_BLOCKING 영역으로 구분하여 성능을 개선한다. 제안하는 MAC 프로토콜의 처리량 성능은 퀄넷 시뮬레이터 버전 3.8을 사용하여 확인하였다.

선박의 자동조타제어

강창남(Chang-Nam Kang) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10

Auto Steering System is the device for course keeping or course altering to ship's steering system. The purpose of automatic steering system is to keep the ship's course stable with the minimum course and rudder angle. Recently, modem control theories are being used widely in analyzing and designing the ship system. Though P.D type auto pilots are widely used in ships, the stability and the adjusting methods are not clarified. In this paper the authors proposed auto steering system with Hybrid Controller. The things that the actual operators of a steering wheel has acquired through their experience can be logically described by the Lingustic Control Rule. The characteristic of the control system were investigated through the computer simulation results. it was found that the Hybrid control was more efficient than the PD control system.

환동해 물류 Hub-Port를 위한 동해항 활성화 방안에 관한 연구

강창남 ( Kang Chang Nam ),엄광열 ( Eom Gwang Yeol ) 한국창업정보학회 2003 창업정보학회지 Vol.6 No.3

수평 전단력에 의한 요천추부 외상성 전외방 골절-탈구

강창남(Chang Nam Kang),공동의(Dong-Yi Kong),서승표(Seung-Pyo Suh) 대한정형외과학회 2013 대한정형외과학회지 Vol.48 No.1

요천추부 외상성 골절-탈구는 해부학적인 특징 때문에 드물게 발생하며 손상 기전에 따라 다양한 전위방향이 보고되었다. 대부분의 보고는 굴곡력, 신전력, 압박력, 회전력에 의한 전방, 후방 외방전위였으며 진단이 늦어지는 경우에는 완전한 정복이 어려워 적절한 치료가 불가능할 수 있다. 저자들은 수평 전단력과 굴곡력에 의한 요천추부의 전외방 골절 및 탈구가 발생하였던 증례에 대해 정확한 진단을 하였고, 후방 도달법만을 이용한 부분 추체 제거술, 관혈적 정복, 후방추체 간 유합술과 척추경 나사못을 이용한 고정 및 후외방 유합술을 시행하여 좋은 결과를 얻었기에 이에 문헌고찰과 함께 보고하는 바이다. Lumbosacral fracture-dislocation is very rare because of the characteristic anatomical features, and various displacements by injury mechanisms have been reported. Most of the reports were displaced by flexion, distraction, compression and rotation. Complete reduction and appropriate treatment can be difficult or impossible in the case of delayed diagnosis. We report a case of lumbosacral fracture & dislocation that occured in horizontal shear and flexion, which was correctly diagnosed and treated successfully with partial corpectomy, open reduction, posterior interbody fusion and transpedicular fixation with posterolateral fusion by posterior approach only.

FNN에 의한 선박의 제어

강창남(Chang-Nam Kang) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7

Fuzzy neural ship controllers is used in ship steering control. It can make full use of the advantage of all kinds of intelligent algorithms. This provides an efficient way for this paper. An RBF neural network and GA optimization are employed in a fuzzy neural controller to deal with the nonlinearity, time varying and uncertain factors. Utilizing the designed network to substitute the conventional fuzzy inference, the rule base and membership functions can be auto-adjusted by GA optimization. The parameters of neural network can be decreased by using union-rule configuration in the hidden layer of the network. The ship control quality is effectively improved in case of appending additional sea state disturbance. The performance of controller is evaluated by the system simulation using simulink tools.