• Title/Summary/Keyword: Research Obstacle

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A Study on Effects of Balance Taping Therapy applied on the patients with Arthritis caused upon the Pain in Legs and Obstacle in Daily Activity (밸런스테이핑이 퇴행성관절염 환자의 다리통증과 일상 활동장애에 미치는 효과)

  • Hyun, Sin-Sook;Park, Kyung-Sook
    • Korean Journal of Adult Nursing
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    • v.16 no.4
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    • pp.585-596
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    • 2004
  • Purpose: This study is to examine the effect of balance taping therapy applied on the old people who suffer from arthritis upon the pain in legs and obstacle in daily activity. Methods: The research period was from Dec. 2003 to Feb. 2004, and among the old female people who visited one of the welfare halls in Seoul downtown and 4 assembly hall for old people who aged over 60 years. 30 of the experimental group and 33 of control group were optionally collected. Results: The pain degree in legs and the uneasiness degree of the obstacle in the daily life of the experimental group who were treated by the balance taping was decreased than those of the control group(p=0.015, p=0.000). Conclusions: Based upon the above result, it was confirmed that the balance taping therapy has influence in decreasing the degree of the uneasiness in the leg pain and daily activity obstacle of the old people who suffer from the arthritis, and therefore it is thought that this therapy can be usefully applied for one of the nursing methods for the old patients, and besides the repeated future researches are needed.

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Numerical Simulation of Pipe Flow with an Obstacle by applying Turbulent Models (난류모형을 적용한 장애물이 있는 파이프내의 유동장 수치시뮬레이션)

  • Kwag Seung- Hyun
    • Journal of Navigation and Port Research
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    • v.29 no.6 s.102
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    • pp.523-528
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    • 2005
  • The flow analysis is made to simulate the turbulent flow in the pipe with an obstacle. The models used are k-$\epsilon$, k-$\omega$, Spalart-Allmaras and Reynolds. The structured grid is used for the simulation The velocity vector, the pressure contour, the change of residual along the iteration number and the dynamic head are simulated for the comparison of four example cases. For the analysis, the commercial code is used.

Localization System of guide-robot for Visually Impaired using DGPS (DGPS를 이용한 시각장애인 유도로봇의 Localization 시스템)

  • Park, Seung-Woo;Shin, Dong-Baum;Lee, Eung-Hyuk;Han, Jin-Soo;Hong, Seung-Hong
    • Proceedings of the KIEE Conference
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    • 2002.11c
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    • pp.501-504
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    • 2002
  • This research embodied DGPS (Differential GPS) system that robot detects users present position in outside environment as part of Lacteal gland robot that is sight obstacle. Therefore, introduced GPS system that is effective means that can save essential world coordinate to realize global navigation. However, it is no the effectiveness to use GPS that is having error of tens meter to apply to lacteal gland robot that is sight obstacle without revision. Therefore, this research embodied Localization system of lacteal gland robot that is sight obstacle using DGPS that make use of FM DARC system to use DGPS to heighten navigation accuracy of this.

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A Study of Obstacle Factors and Development Schemes for Cooperation between Firms and Universities in Engineering Education (공학교육에서 산학협력 애로요인 및 활성화 방안 연구)

  • Cho, Young-Im;Jeong, Hyeong-Chul
    • Journal of Engineering Education Research
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    • v.13 no.4
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    • pp.36-42
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    • 2010
  • In this paper, we consider a cooperation between firms and universities based on KOITA's and KIET's research results which is a research organ about the obstacle factors of the cooperation between firms and universities. Also, we consider the motivation of a cooperation with a technology innovation based on STEPI's research results. From the basis on the results, we will suggest a new cooperation strategy between firms and universities. We will propose a new development cooperation model(strategy) which is included the infra(hardware), that is implemented for the company's support, and the networking between cooperation components and expert management man-power.

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The Effects of Circuit Obstacle Group Gait Training on Gait and Emotion in Stroke Patients (순환식 장애물 집단 보행 훈련이 뇌졸중 환자의 보행 능력과 정서에 미치는 효과)

  • Kim, Chul-Min;Lee, Ho-Jung;Choi, Myeong-Su;Song, Ju-Min
    • Journal of the Korean Society of Physical Medicine
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    • v.7 no.1
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    • pp.125-135
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    • 2012
  • Purpose : This study is designed to demonstrate the effects of circuit obstacle group gait training on walking ability and emotion in stroke patients. Methods : Twenty one patients with stroke were participated in this study. The subjects were divided into control group(n=10) and experimental group(n=11). Circuit obstacle group gait training consisted of walking around obstacles, walking over obstacles, walking up and down slopes and walking up and down stairs. Circuit obstacle group gait training was conducted five times per week, 1 hour per session, for 6 consecutive weeks. At pre-test and post-test, subjects were tested with 10 m walking test, timed up and go test, up and down 4 stairs test, depression and self esteem. Results : After 6 weeks of research, the experimental group showed statistically significant difference in all items when comparing prior to training and after training (p<.05), but the control group showed statistically significant difference in items other than depression and self esteem(p<.05). In the comparison between the two groups, the experimental group showed higher improvement than the control group in the 10 m walking test, timed up and go test, and up and down 4 stairs test, and there was statistically significant difference in decrease of degree in depression between the experimental group and control group(p<.05). Conclusion : This study have shown that circuit obstacle group gait training improves walking ability and emotion in stroke patients.

Haptic Joystick Implementation using Vibration Pattern Algorithm (진동패턴 알고리즘을 적용한 조이스틱의 햅틱 구현)

  • Noh, Kyung-Wook;Lee, Dong-Hyuk;Han, Jong-Ho;Park, Sookhee;Lee, Jangmyung
    • Journal of Institute of Control, Robotics and Systems
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    • v.19 no.7
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    • pp.605-613
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    • 2013
  • This research proposes a vibration pattern algorithm to implement the haptic joystick to control a mobile robot at the remote site without watching the navigation environment. When the user cannot watch the navigation environment of the mobile robot, the user may rely on the haptic joystick solely to avoid obstacles and to guide the mobile robot to the target. To generate vibration patterns, there is a vibration motor at the bottom of the joystick which is held by the user to control the motion direction of the mobile robot remotely. When the mobile robot approaches to an obstacle, a pattern of vibration is generated by the motor, and by feeling the vibration pattern which is determined by the relative position of the mobile robot to the obstacle, the user can move the joystick to avoid the collision to the obstacle for the mobile robot. To generate the vibration patterns to convey the relative location of the obstacle near the mobile robot to the user, Fuzzy interferences have been utilized. To measure the distance and location of the obstacle near the mobile robot, ultrasonic sensors with the ring structure have been adopted and they are attached at the front and back sides of the mobile robot. The precise location of the obstacle is obtained by fusing the multiple data from ultrasonic sensors. Effectiveness of the proposed algorithm has been verified through the real experiments and the results are demonstrated.

Analysis of Obstacle Gait Using Spatio-Temporal and Foot Pressure Variables in Children with Autism (자폐성 장애 아동의 시공간 및 압력분포 변인을 통한 장애물보행 분석)

  • Kim, Mi-Young;Choi, Bum-Kwon;Lim, Bee-Oh
    • Korean Journal of Applied Biomechanics
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    • v.21 no.4
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    • pp.459-466
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    • 2011
  • The purpose of this study was to analyze of obstacle gait using spatio-temporal and foot pressure variables in children with autism. Fifteen children with autism and fifteen age-matched controls participated in the study. Spatio-temporal and foot pressure variables was investigated using GAITRite pressure sensor system. Each footprint was divided into 12 equal trapezoids and after that the hindfoot, midfoot and forefoot analysis was developed. Independent t-test was applied to compare the gait variables between the groups. The results showed that the autism group were significantly decreased in velocity, cadence, cycle and swing time compared to the control group. The autism group were significantly increased in step width and toe out angle compared to the control group. The autism group were significantly increased at midfoot and forefoot of lateral part of footprint and forefoot of medial part of footprint in the peak time compared to the control group. The autism group were significantly increased at midfoot and hindfoot in $P^*t$, at midfoot in active area, and at hindfoot in peak pressure compared to the control group. In conclusion, the children with autism showed abnormal obstacle gait characteristics due to muscle hypotonia, muscle rigidity, akinesia, bradykinesia and postural control impairments.

Modeling flow and scalar dispersion around Cheomseongdae

  • Kim, Jae-Jin;Song, Hyo-Jong;Baik, Jong-Jin
    • Wind and Structures
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    • v.9 no.4
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    • pp.315-330
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    • 2006
  • Flow and scalar dispersion around Cheomseongdae are numerically investigated using a three-dimensional computational fluid dynamics (CFD) model with the renormalization group (RNG) $k-{\varepsilon}$ turbulence closure scheme. Cheomseongdae is an ancient astronomical observatory in Gyeongju, Korea, and is chosen as a model obstacle because of its unique shape, that is, a cylinder-shaped architectural structure with its radius varying with height. An interesting feature found is a mid-height saddle point behind Cheomseongdae. Different obstacle shapes and corresponding flow convergences help to explain the presence of the saddle point. The predicted size of recirculation zone formed behind Cheomseongdae increases with increasing ambient wind speed and decreases with increasing ambient turbulence intensity. The relative roles of inertial and eddy forces in producing cavity flow zones around an obstacle are conceptually presented. An increase in inertial force promotes flow separation. Consequently, cavity flow zones around the obstacle expand and flow reattachment occurs farther downwind. An increase in eddy force weakens flow separation by mixing momentum there. This results in the contraction of cavity flow zones and flow reattachment occurs less far downwind. An increase in ambient wind speed lowers predicted scalar concentration. An increase in ambient turbulence intensity lowers predicted maximum scalar concentration and acts to distribute scalars evenly.

Visual Servoing of a Wheeled Mobile Robot with the Obstacle Avoidance based on the Nonlinear Optimization using the Modified Cost Function (수정된 비용함수를 이용한 비선형 최적화 방법 기반의 이동로봇의 장애물 회피 비주얼 서보잉)

  • Kim, Gon-Woo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.12
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    • pp.2498-2504
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    • 2009
  • The fundamental research for the mobile robot navigation using the numerical optimization method is presented. We propose an image-based visual servo navigation algorithm for a wheeled mobile robot utilizing a ceiling mounted camera. For the image-based visual servoing, we define the composite image Jacobian which represents the relationship between the speed of wheels of a mobile robot and the robot's overall speed in the image plane. The rotational speed of wheels of a mobile robot can be directly related to the overall speed of a mobile robot in the image plane using the composite image Jacobian. We define the mobile robot navigation problem as an unconstrained optimization problem to minimize the cost function with the image error between the goal position and the position of a mobile robot. In order to avoid the obstacle, the modified cost function is proposed which is composed of the image error between the position of a mobile robot and the goal position and the distance between the position of a mobile robot and the position of the obstacle. The performance was evaluated using the simulation.

Improvement of Obstruction Detecting Method at Railroad Crossing by Image Analyze (영상해석을 통한 철도건널목 장애물 검지방법 개선)

  • Song, Hyeon-Sam;Kim, Young-Dal;Lee, Dae-Dong;Shim, Jae-Myung
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.7
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    • pp.1444-1450
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    • 2011
  • An analysis of the causes of railroad crossing accidents reveals that most train collision accidents that occur when safety crossing devices are functioning normally occur because vehicles either experience engine failure on the tracks or because drivers were not notified of the coming train, in which case they get trapped on the tracks when the crossing barriers descend. To prevent such an accident, obstacle detection device by using laser beams detecting the presence of obstacle and crossing bar direction controller by moving direction detection sensor using the Earth's magnetic field detection technology are used in the railroad crossing. Despite using the obstacles detector and crossing bar direction controller in the railroad crossing, the equipments for the railroad crossing does not prevent accidents completely. Therefore, this research has studied new method that can detect obstacles through image analyze and alternate existing equipments. There will be excellent effect to be preventing railroad crossing accident by developing a reliable and new obstacle detecting device.