• Proceedings of the KIEE Conference
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• 1994.07a
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• pp.277-279
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• 1994

In this paper, a novel field weakening scheme for the induction machine by the voltage control strategy is presented. The proposed algorithm ensures producing the maximum torque over the entire field weakening legion. Also by introducing the direct field-oriented control in the field weakening legion with large variation in machine parameters, the drive system can obtain the robustness to machine parameter variation. Moreover, by using estimated speed, sensorless speed control can be possible in very high speed lesion. Experimental results for a laboratory induction motor drive system confirm the validity or the proposed control algorithm.

• Korean Management Science Review
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• v.19 no.1
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• pp.67-75
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• 2002

This paper deals with the visualization method of solutions of the linear programming Problem. We used the revised simplex method for the LP algorithm. To represent the solutions at each iteration, we need the informations of feasible legion and animated effect of solutions. For the visualization in high dimension space, we used the method of Projection to the three dimensions if the decision variable vector is over three dimensions, and we studied the technique of preserving original Polyhedral information such as the number of vertices. In addtion, we studied the method of visualizing unbounded feasible region and the adjacency relationship of the vortices welch is Indispensable to cisualize feasible legion.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.438-441
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• 2011

본 논문에서는 게임연구의 초기 과정에 속하는 2D엑션 게임을 기획, 연구, 개발한 결과물을 기술하였다. 2D 횡 스크롤 게임방식인 액션게임으로 획득하는 아이템을 통해 새로운 기술(무기)를 얻으며 소환수가 동반된다. 또한 기존 프로그램은 한 화면 당 출연하게 되는 적군의 수가 제한적이었으나 본 연구에서 개발한 게임은 플레이어가 적군을 섬멸할 때의 쾌감을 높이기 위하여 한 화면당의 적군의 수를 평균 적군 출현 수 보다 높게 조정하여 타격감을 높였다. 그리고 아이템을 획득하게 되면 미량의 아이템을 사용한 후 아이템의 사용이 바로 중단되어 플레이어들에게 아쉬움을 주었으나 본 프로그램에서는 한번 획득한 아이템은 다음 아이템을 획득하기 전까지 영구적으로 사용할 수 있게 제작되어 그 아쉬움을 줄였고, 스테이지의 끝에서는 보스를 파괴하는 스테이지 게임의 구현 결과물이다.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.48 no.2
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• pp.40-46
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• 2011

This paper proposes a real-time face detection and tracking system that uses neural oscillators which can be applied to access regulation system or control systems of user authentication as well as a new algorithm. We study a way to track faces using the neural oscillatory network which imitates the artificial neural net of information handing ability of human and animals, and biological movement characteristic of a singular neuron. The system that is suggested in this paper can broadly be broken into two stages of process. The first stage is the process of face extraction, which involves the acquisition of real-time RGB24bit color video delivering with the use of a cheap webcam. LEGION(Locally Excitatory Globally Inhibitory)algorithm is suggested as the face extraction method to be preceded for face tracking. The second stage is a method for face tracking by discovering the leader neuron that has the greatest connection strength amongst neighbor neuron of extracted face area. Along with the suggested method, the necessary element of face track such as stability as well as scale problem can be resolved.

• Proceedings of the KIEE Conference
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• 2003.11b
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• pp.131-134
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• 2003

In this paper, we consider the problem of finding the stability region in state space for uncertain linear systems with input saturation. For stability analysis, two Lyapunov functions are chosen. One is for the lineal region and the other is for the saturated legion. Piecewise Lyapunov functions are obtained by solving successive linear matrix inequalites(LMIs) relaxations. A sufficient condition for robust stability is derived in the form of stability region of initial conditions. A numerical example shows the effectiveness of the proposed method.

• Journal of the Korean Society of Physical Medicine
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• v.2 no.1
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• pp.49-59
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• 2007

Objective : To purpose of this study was the most of the ladies wear high-heeled shoes at lease 4 to 5 day a week but the effect of it's height on the lumbo-sacral legion angle has not been clearly defined. Method : Subject were 20 young ladies, who had majored in physical therapy of the Dae-gu Health College. Method 1. PACS system X-ray was used to measure the lumbo-sacral legion angle under the condition of bare foot, 3cm, 7cm high-heeled at standing position. 2. Spinal Mouse was used to measure the spinal segment motion angle and length under the condition of bare foot, 3cm, 7cm high-heeled at being Flexion-Extension position Result : The result of this study were as follow I. Significant statistical increase in lumbar lordosis was observed as the heel height was increased from bare foot to 7cm high-heeled(p<.05), but there was no significant difference in the lumbo-sacral angle & sacral angle(p>.05). 2. The Height and the weight of the subjects, their preference on the shoes didn't affect the lumbo-sacral lesion angle(p>.05) 3. The variation of the heel height didn't affect the spinal segment motion angle and length(p>.05). Conclusion : There is strong relationship between the high of heel with increasing the lumbar lordosis(p<.05).

• The Journal of Churna Manual Medicine for Spine and Nerves
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• v.4 no.2
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• pp.185-196
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• 2009

Objective: The purpose of this study is to investigate the effects of oriental medicine conservative treatment on patients who show symptoms at the legion opposed to that shown in Magnetic Resonance Image(MRI) findings. Subject & Method: Oriental medicine treatment such as acupuncture and herbs was applied to two patients who were diagnosed as lateral herniated intervertebral disc of lumbar spine via MRI but whose pain and muscular force attenuation were shown at the opposed lower limb, for measuring its effects. Results: As for the two cases, the patients were favored in the Visual Analog Score (VAS) and the Straight leg Raising(SLR) test after the oriental medicine conservative treatment. In one case, the muscular force in the lower limb was favored. Conclusion: Based on the results in this study, oriental medicine conservative treatment might be effective on patients who show symptoms at the legion opposed to that shown in MRI findings.

• Journal of Chest Surgery
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• v.35 no.8
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• pp.626-629
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• 2002

Cavernous hemangioma in mediastinum is a rare tumor. A 13 year old girl was referred becaused of abnormal mediastinal shadow in simple chest X-ray. Chest CT scan revealed a somewhat inhomogenous cystic legion arround the whole length of SVC. Surgical excision was done through the right posterolateral thorachotomy. The pathology was confirmed as cavernous hemangioma.

• Journal of the Korea Computer Industry Society
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• v.3 no.12
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• pp.1669-1678
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• 2002

Symmetry region searching can extract face region without a prior information in an image by using symmetric. However, this method requires a plenty of the computation time because the mask size to process symmetry region searching must be larger than the size of object such as eye, nose and mouth in face. In this paper, we proposed symmetric by using symmetry region searching in the reduced image to reduce computation time of symmetry region searching. It was applied to this method in an original image. To extract exact face region, we also experimented face region searching by using domain division in extraction legion.

• Proceedings of the KIEE Conference
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• 2006.10c
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• pp.297-299
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• 2006

Searching the region of interest on the Hough transform domain is done to determine the real road boundary on the high speed way. The mathematical morphology is employed to obtain the gradient image which is utilized in Hough transform. Many possible candidates of lines could appear on the ordinary road environment and simple selection of the strongest line segments likely to be fault boundary lines. To solve such problem, the search area for the candidates of the road boundary which is called the region of interest is limited on the Hough space. The effectiveness of the proposed algorithm has been shown with experimental results.