흰쥐 척수 손상후 Parvalbumin과 Calbindin D-28K 함유신경세포에 관한 면역세포화학적 연구

김종중,정윤영,임유택,박상수,박영란,김현곤,문정석 조선대학교 부설 의학연구소 2002 The Medical Journal of Chosun University Vol.27 No.2

Background and Objectives: This study was done to compared the distribution of the two calcium-binding proteins immunoreactive neurons, parvalbumin immunoreactiv (PV-IR) and calbindin D-28K immunoreactive (CB-IR) neurons in the spinal cord after transection. Materials and Methods: Twenty rats were divided into 3 groups (control, complete spinal cord injury (SCI), and right and left spinal cord hemisection). SCI was produced by cutting the spinal cord use blades 11 with scalpel handles. Results: In this experiment, CB-IR neurons were mainly found in many pyramidal cells distributed in the brain stem and spinal cord of rats. PV-IR Neurons were demonstrated in all lamina of the gray matter of the spinal cord. These immunoreactive cells had the highest density in the layer I and II of dorsal horn and several nuclei of the ventral horn of the all the segments of the spinal cord. CB-IR neuropil labeling was strongly noted in all the segments of the spinal cord. In contrast PV-IR neurons were different in distribution, size and morphology in the spinal cord. The number of PV-IR neurons were greater than in the spinal cord compared with the CB-IR neurons. CB-IR and PV-IR somata were round, oval, spindle and polygonal in shape, and were unipolar, bipolar, multipolar and horizontal in types. The diameters of the somata of the PV-IR and CB-IR neurons were 40-50 ㎛, respectively. Also dendrites of PV-IR and CB-IR neurons were densely arrayed in network.

SS통신에서 동기포착 시간을 단축한 고속데이타 전송방식

卓漢浩,金昌圭,金炫悳 진주산업대학교 농업기술연구소 1992 農業技術硏究所報 Vol.5 No.-

It is know that the period of PN code in the conventional SS system have a 1:1 relation with respect to a data 1 bit. Therefore, the conventional SS system require the data recovery circuit. But in this papper, we proposed the high speed data transmission method without a data recovery circuit. In this data tranlsmission method, the period of PN code have a fixed relation with respect to a data 1 bit. Finally, the pattern detected PN code is used for a timing signal for data detect. As a result of experiment, the proposed method reduced the synchronization acquisition time. Therefore, it is possible of a high speed data transmission.

PID 제어기의 퍼지 이득 조정

탁한호,추연규,김현덕 진주산업대학교 1999 산업과학기술연구소보 Vol.- No.6

The purpose of this paper is to find PID parameters. The model of controller is designed by Matlab-Simulink program and each parameter of PID is estimated automatically by the Fuzzy controller. The simulation is carried out on FGS(Fuzzy Gain Scheduling), and then this is compared and analyzed with the simple PID controller.

미세혈관 문합술을 이용한 절단된 귀 재접합 치험례:1례보고

김정헌,이현택,박배근,김동철,황성진 대한성형외과학회 1992 Archives of Plastic Surgery Vol.19 No.3

The auricle is frequently exposed to trauma due to its protruding anatomical position and it is sometimes severed completely. Many kinds of techniques such as composite graft or cartilage preservation methods for the reattachment or reconstruction of and amputated ear have been tried. But their indications are limited and results are not satisfactory. For the complete survival of ear cartilage and skin of the amputated part, microvascular replantation is known as the best procedure. But cases of successful replantations have been rare until now, because of technical difficulties due to the small size of auricular vessels and uncertain vascular anatomy. In 1980, Pennington et al. reported the first successful microvasclar replantation of a totally avulsed ear using vein graft. After that about 10 cases of world wide successful micro replantation of servered ears were reported. Here, we report a case of a successful replantation of a completely amputated lower half of auricle including the ear lobule due to a human bite. Replantation was done by direct anastomosis of transected peripheral branches of the posterior auricular artery and vein without vein graft. We again emphasize that, in spite of the technical difficulties and long operative time, successful replantation of an amputated ear with microvascular surgery is superior to any other methods of reattachment or reconstruction.

고동도 불순물 첨가효소와 N^+―P형 태양전지에의 응용

金昌圭,金炫悳,卓漢浩 진주산업대학교 1989 論文集 Vol.27 No.-

태양전지의 접촉전위차 증대 방향에 대한 방법을 제시하고 그중 태양전지 구조형성에 고농도 불순물 첨가가 미치는 영향을 이론적으로 고찰하고 이 효과를 나타내는 파라메타(parameter)들을 불순물 농도의 함수로서 modeling 하였다. 또한 고농도 불순물 첨가효과의 소자에 대한 응용으로써, 이 효과를 고려한 n'-p형 태양전지를 해석해서 n영역(즉 emitter)의 설계 파라메타에 대한 접촉전위차의 관계를 조사했다. This experiment was present to method on contact potential increase direction of Solar Cells, and among that investigate on exert influence the heavy doping at Solar Cell structure formation theoretically, and model the parameters as a function of impurities concentration. To apply the heavy doping effects to devices, we also analyze N^4-P type Solar Cell in consideration of these effects and investigate the dependence of contact potential on the emitter disign parameters.

PWM 정류초퍼 히스테리시스 전류제어의 SMPC

卓漢浩,金昌圭,金炫悳 진주산업대학교 1991 論文集 Vol.29 No.-

위치제어기는 관성이 클 경우 가속과 감속동안 동력학 에너지 변환이 이루어 져야한다. 이 경우 복합된 전류제어 PWM 정류기와 PWM 초퍼 링크로서 시스템에 전력을 변환시킬 수 있다. 따라서 본 논문에서는 다양한 위치제어 방법중 PWM정류초퍼 히스테리시스 전류제어 및 슬라이딩 기법을 이용하여 위치제어를 행하고자 한다. 이 경우에 있어서 위치제어는 다음과 같은 특성을 얻을 수 있다. 1. 조정된 정현과 전류파형을 히스테리시스 제어로 근접시킬 수 있고, 2. 슬라이딩 모드제어로써 외란, 파라메타 변화에 강인함을 얻을 수 있었다. Position controllers must handle kinetic energy exchanges during acceleratin and deceleation of large inertias. Temporary buffer storage in capacitors is expensive. The system that can manage the power exchange with ease is the integrated controlled-current PWM(pulse width modulated ) rectifier/controlled-current PWM chopper link. Bidirectional power is accomplished by bidirectional current flow in the dc link for both modulators. The three-phase current in the rectifier side are near sinusoidal in waveform at unity power factor. The performance of the system as a position controller in an enviroment of the sliding mode strategy in studied. The sliding mode strategy offers robust characteristics to the controller.

골반경하 난관 수종 수술시 난관채 부위 외번 방법에 대한 고찰

오성택,김현주,김승국 대한산부인과내시경학회 1992 대한산부인과내시경학회잡지 Vol.4 No.2

Visible Human Data의 3차원 가시화에 대한 연구

최형근,김동현,탁계래,신현준 건국대학교 의과학연구소 2000 건국의과학학술지 Vol.10 No.-

Visualization is the process of exploring, transforming and viewing data as images to gain understanding and insight into the data. Visualization in medicine is helpful in understanding human anatomy by presenting the information in a form that is not only pleasing but also easily recognizable as well as in gaining functional attributes of medical systems, such as biomechanical and physiological properties. Medical applications include accurate anatomy and function mapping, enhanced diagnosis. accurate treatment planning and rehearsal, and education/training. The Visible Human data set of the National Library of Medicine, the most complete anatomically detailed. computerized database of the human body ever assembled, has been used for these purposes. In this study, we have visualized the Visible Human Data set with VTK(Visualization ToolKit, Kitware Inc.), IAP(Image Application Platform, ISG Inc.) and Visual C++ 6.0. A motivation of this study is the fact that computer imaging techniques have become an important diagnostic tool in the practice of modern medicine. The 3D visualization system consists of a basic 2D image processing such as filtering, panning, zooming and measuring image as well as 3D image processing such as multiplanar reformatting, surface rendering and volume rendering. The wide-spread use and accessibility of the web have been required to provide the visualization of 3D image on the web. Thus, we have developed web-based medical 3D visualization system that supports World-Wide-Web using VRML and client/server architecture.

SIIM 퍼지 PID 제어기를 이용한 3축 푸마 로봇의 경로 제어에 관한 연구

석홍성,채창현,고택범,김희년 금오공과대학교 산업기술개발연구원 2000 産業技術開發硏究 Vol.16 No.-

This paper describes the design of the Fuzzy PID controller using simplified indirect inference method. First, the fuzzy digital PID controller are derived from the conventional continuous time linear ones. Then the fuzzification, control-rule base, and defuzzification using SIIM in the design of the fuzzy digital controller are discussed in detail. The resulting controller is a discrete time fuzzy version of the conventional digital PID controller, which has the same linear structure, but are nonlinear functions of the input signals. The proposed controller enhances the self-tuning control capability, particularly when the process to be controlled is nonlinear. When the SIIM is applied, the fuzzy inference results can be calculated with splitting fuzzy variables into each action component and are determined as the functional form of corresponding variables. So the proposed method has the capability of the high speed inference and adapting with increasing the number of the fuzzy input variables easily. Computer simulation results have demonstrated the superior to the control performance of the conventional digital PID controller. Lastly, it is applied to the trajectory control of the PUMA robot with three-axis.

국산 알파휘토프로테인 RIA 키트의 기본적 검토

신금철,조미라,김현주,서일택 대한임상병리사협회 2001 대한임상병리사회지 Vol.21 No.1