신경근전기자극이 흰쥐 골격근의 미세구조에 미치는 영향

박장성,박천만 대한임상전기생리학회 2003 대한임상전기생리학회지 Vol.1 No.-

트레드밀 걷기 동안 인솔형태가 하퇴 근육의 근 활성에 미치는 영향

박장성,서삼기,이상호,정화수,임재헌 대한임상전기생리학회 2010 대한임상전기생리학회지 Vol.8 No.2

근피로 유발 후 신장운동시 심부투열치료가 슬관절 위치감각에 미치능 영향

박장성,최은영,정화수 대한임상전기생리학회 2010 대한임상전기생리학회지 Vol.8 No.1

근피로 유발 후 신장운동시 심부투열치료가 슬관절 위치감각에 미치는 영향

박장성,최은영,정화수,Park, Jang-Sung,Choi, Eun-Young,Jung, Hwa-Su 대한임상전기생리학회 2010 대한임상전기생리학회지 Vol.8 No.1

Purpose : This study will recognize about the influences that stretching exercise with ultrasound and microwave application has on a knee joint position sense after induction to muscle fatigue. Methods : The object by each ten people divided at random thirty physical healthy adult men to constant group 1, group 2, group 3 to the objects. Treadmill exercised for induction to muscle fatigue, and let an exercise intensity decided on 85% of the maximum heart beat number with the goal heart beat number, and you exercise. Goal heart beat number measured as used heat rate monitor, and measured a oneself at the scale in order to recognize own physical state after end treadmill exercise to all objects to criteria to evaluate an ability shown in case of sports. Knee joint position sense used a N-K table, and experimenter did so as adaptation got passively arbitrary three angle done, and to order an original position. The object carried in person out one angle that experimenter designated, and measured repeatedly an error along him to this three times after being so. Rear before induction to muscle fatigue a position sense and measured after stretching exercise application, and played. Stretching exercise after induction applied stretching exercise, stretching exercise with ultrasound, stretching exercise with microwave, and applied to each group 1, group 2 and group 3 to muscle fatigue. Results : The result each group the difference which considers does not come out it was not but, improvement of the position sense is the possibility of knowing was from group 1, group 2 and group 3. Conclusion : These findings stretching exercise and stretching exercise with ultrasound and microwave after induct ion give help to a position sense elevation, and execute stretching exercise, and be effective against damage prevention by physical insecurity to muscle fatigue, and look.

레이져 레이다와 Spin Image를 이용한 자세 독립적 자동 타겟 인식

박장성,방효충 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.11

그동안 수많은 Target recognition 기법들이 개발되어 왔지만, 이러한 기법들은 저해상도의 data를 사용하기 때문에 target 식별력이 낮고, 사용가능한 컴퓨터의 제한적 성능 때문에 성공률이 제한되어왔다. 여기서 소개할 Pose-Independent automatic target recognition 은 Laser Radar의 고해상도 data를 이용하여 data해상도에 따른 제한을 줄이고, Target의 Position에 상관없이 target recognition이 가능한 Spin-image 기반의 기존의 알고리즘을 사용함으로써 target recognition이 어떻게 이루어지는지 살펴 보았다. 또한 기존의 Spin-image를 이용한 방법과는 달리 아이디어를 더하여 제한된 컴퓨터 성능에서도 더 빠른 계산이 가능하도록 단순화한 방법을 사용하였다. 이를 Simple Spin-image라고 하며 이는 1D 배열 형태의 데이터이다. 그런 후, Simple spin-image와 기존의 Spin-image의 target recognition 확률을 비교해 보았다. Laser Radar를 이용하여 Target Recognition을 하게 되면 고해상도의 Data를 이용하여 오차를 줄일 수 있다는 장점 외에도, target과 나의 상대적 위치와 거리를 자세하고 손쉽게 파악이 가능하기 때문에, 이를 이용 정밀 유도 및 착륙 도킹등에 활용하기가 쉽다는 장점이 있다. Although a number of target recognition techniques have been developed, these techniques have had limited success in target discrimination in part due to low resolution data and limits in available computation power. We present a Pose-Independent automatic target recognition that uses high resolution data from 3D Laser Radar. This has little noise by high resolution data and could recognize the target regardless of target's position by using spin-image based algorithm. We just add our simple idea to calculate faster then existing spin-image in low computational power. We call it Simple Spin-image that has a 1D array data. And then we compare probability of recognition between existing and Simple case. Except of advantage of using laser radar, small amount of error by using high resolution data, we can find easily the relative distance information. This information has advantages that can be easily used precision guidance, landing and docking

경피신경전기자극이 지연성근육통의 교감신경활동에 미치는 영향

박장성,Park, Jang-Sung 대한물리치료학회 2002 대한물리치료학회지 Vol.14 No.1

This study conducts eccentric exercise ti non-dominant elbow flexor of 20 persons in order to examine the effects of transcutaneous electric nerve stimulation on sympathetic nerve activity in delayed onset muscle soreness, induces delayed onset muscle soreness, divides them into 10 persons respectively as experimental and control groups. And a stimulation for 2 min. with 100 pps is given to elbow flexor after repeated three times of 10 minutes rest, temperature, blood pressure and pulse are measured and as a result of two-way ANOVA, change of temperature didn't show a significant difference according to the elapse of times(p>0.05) and systolic pressure and pulses in showed a significant difference between experimental and control groups(p<0.05). These results suggest that transcutaneous electrical nerve stimulation has a direct or indirect influence on sympathetic nerve activity in delayed onset muscle soreness under a restricted condition of electrical stimulation.

Wind stabilized 탐색기 유도필터 설계

박장성,박상혁,김경훈,권혁훈 한국항공우주학회 2023 韓國航空宇宙學會誌 Vol.51 No.9

In this paper, we propose a guidance filter to estimate LOSR(Line of Sight Rate) of a guided weapon equipped with wind stabilizer seeker and without thrust. Use the estimation of airspeed estimation filter to compensate for the tilt angle of stabilizer from the measurements. To calculate LOSR, we adapt two stage filter. First, we calculate AOA(Angle of Attack) and AOS(Angle of Sideslpi) using airspeed estimation filter result. And then, we calculate look angle based on body axis using AOA, AOS and seeker measurements. The LOS(Line of Sight) is calculated using the look angle and attitude information, and the LOSR is estimated using the LOS. Through the proposed filter, we can apply proportional navigation guidance instead of pursuit guidance to wind stabilizer seeker and increase engagement performance against moving target. 본 논문은 Wind stabilized 탐색기가 장착된 무추력 유도무기의 시선각속도를 추정하는 유도필터 설계에 대해서 다룬다. 제안하는 유도필터는 탐색기의 측정치에서 Stabilizer의 tilt 각을 보상하기 위해 대기속도 추정 필터로 추정한 대기속도를 이용한다. 시선각속도를 추정하기 위해 2단계의 필터 구조를 이용한다. 먼저, 받음각과 미끄럼각을 계산하기 위해 대기속도 추정 필터 결과를 사용한다. 받음각과 미끄럼각을 탐색기 측정치에 보상하여 동체 기준의 지향각을 계산한다. 지향각과 자세 정보를 이용하여 시선각을 계산하고 이를 이용하여 시선각속도를 추정하도록 하고 있다. 이를 통해 Wind stabilized 탐색기가 장착된 유도무기에서 추적 유도 대신 비례항법유도가 가능하도록 하여 이동 표적에 대한 교전능력을 향상시킬 수 있다.

영상기반 상대항법을 위한 GLSDC 초기값 설정에 관한 연구

박장성,방효충 한국항공우주학회 2012 한국항공우주학회 학술발표회 논문집 Vol.2012 No.4

본 논문에서는 무인항공기의 상대항법을 목표로 영상 정보만으로 타겟 항공기의 상대위치 및 자세각을 추정할 때 최소자승법을 기반으로 한 알고리즘들 중에서 무인기의 자동 공중 급유에 사용되었던 Gaussi an Least Squares Differential Correction(GLSDC) 소개하고, 적용하여 사용 타겟의 상대위치와 자세를 추정하였다. 공중 급유에 적용된 알고리즘을 그대로 적용시 상대적인 자세나 위치의 변화가 큰 경우에 자세를 추정하지 못하는 문제가 발생한다. 이를 해결하기 위한 방법으로 영상평면상에서의 비콘의 위치만을 이용, 현시간에서 반복을 하기 위한 초기값을 만들어내어 적용하였다. 카메라 모델의 경우 Pin Hole 모델을 적용하였다. 구현 결과, 기존의 자동 공중 급유에 사용되었던 방법의 경우 전 시간과 현시간의 상대적인 변화가 큰 경우에 타겟의 상태를 추정하지 못하지만, 초기값을 현시간의 비콘의 위치로부터 추정한 값을 준 경우 상대적인 변화가 크더라도 잘 추정하는 것을 확인 할 수 있다. This paper introduces some Vision-based UAV relative position and attitude estimation algorithm Gaussian Least Squares Differential Correction(GLSDC) based on Least squares and used in autonomous aerial refueling problem and applies to estimate states of target. Just apply GLSDC used aerial refueling then the algorithm cannot estimate relative position & attitude when the case of formation flying or rapid change of state. To solve the estimation problem, appropriate initial value is adjusted made by position of beacon in image plane at each time step. The simulation results present the robustness when using GLSDC with appropriate initial value.

하지근력강화가 노인의 보행 및 균형능력에 미치는 영향

박장성,최은영,황태연,Park Jang-Sung,Choi Eun-Young,Hwang Tae-Yejn 대한물리치료학회 2002 대한물리치료학회지 Vol.14 No.2

This study aims at examining the effects of strengthening leg muscular strength on increasing elderly's muscular strength, walking ability and balance according to their experience of injury from a fall. It conducts muscular strength exercise for 4 weeks with 19 healthy old people over 65years and as a result of measuring their conditions for 6 weeks, it obtains the following conclusions. 1. Two groups showed a significant difference in their muscular strength, walking ability and balance according to the period(p<0.05). 2. Muscular strength and balance between the two groups showed a significant difference(p<0.05), but there was no significant difference in their walking ability(pgt;0.05). 3. Therefore, the exercise of strengthening leg muscular strength in this study has a significant effect on old people's walking ability and balance.

신경근전기자극이 흰쥐 골격근의 미세구조에 미치는 영향

박장성,박천만,Park, Jang-Sung,Park, Chun-Man 대한임상전기생리학회 2003 대한임상전기생리학회지 Vol.1 No.1

This study conducts electrical stimulation to male white rat of Spargue-Dawley which is 7 weeks, has the weight of 240 g and is seemingly healthy for one or two weeks by means of neuromuscular electrical stimulator in order to examine the effects of neuromuscular electrical stimulation on its gastrocnemius, measures change of weight of gastrocnemius, serum and enzyme activity and then obtains the following conclusions. There is little difference in AST and CPK of weight and serum of gastrocnemius after one or two weeks of conducting neuromuscular electrical stimulation in all experimental groups. On the one hand, as a result of histochemical observation, NMES I group showed hypertrophy of perimysium and increase of sectional diameter of muscle fiber compared to comparison group, but NMES II group showed a similar result to comparison group. When ultrasubstructure was observed under electron microscope, I-type muscle fiber of NMES I group showed well-arranged mitochondria and it was similar to comparison group. II-type muscle fiber showed a large quantity of glycogen granules within sarcoplasmatic and the extension of luminal of T-tubule. I-type muscle fiber of NMES II group had small mitochondria and showed the vacuolar degeneration of mitochondria and extended T-tubule. II-type muscle fiber showed the extension of agranule cytoplasma reticulum with T-tubule and the reduction of amount of glycogen granule within partial sarcoplasmatic.