• 한국시스템다이내믹스연구
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• 제13권2호
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• pp.25-45
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• 2012

The purpose of this study is to estimate the effects of healthy city policies on residents' walking. In order to estimate promotion of walking rates by healthy cities policies, it developed System dynamics(SD)-based model which showed causal relationships among urban design, public health policies, and walking levels. SD technique is useful for future forecast and policy impact assessment. The spatial units of the SD-based system for policy impact assessment included 66 cities, counties, and communities in Seoul Metropolitan Area. The system simulation was planned to be run for 21 years from 2009 to 2030. For this study, 3 alternatives were proposed with combinations of length of bike lanes, number of bus routes, crime rates, self-reported good health status rates, and obesity rates. As a result of simulations, residents' participation rates for walking were increased from 1.00% to 9.98%. This study contributes to better understanding the benefits of healthy cities that are associated with individual walking. It further provided useful insights into planners' role in promoting health. The paper concluded with a discussion on future research opportunities and implications for public policies in urban and transportation and public health.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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• pp.530-532
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• 2006

In this paper, we propose stable walking algorithm using ZMP for the biped robot in the slope-way. At first, we define discrete state variables that classified stable area and unstable area by center of mass from ZMP during slope-way walking. For the stable walking gait, the discrete state controller for determining the high-level and low-level decision making are designed. The high-level decision making is composed of the discrete state variables; left foot support phase, right foot support phase, flat-way, and slope-way. Then the continuous state controller is implemented for the low-level decision making using ZMP.

• 한국ITS학회 논문지
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• 제15권1호
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• pp.16-27
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• 2016

본 연구는 고령자의 목적별 보행 행태에 대한 기초분석과 함께 토빗모형을 활용해 보행 행태에 영향을 끼치는 요인을 규명하였다. 영향요인으로는 보행자 행태와 연관 있는 개인 특성, 가구 특성, 존 특성 변수 등을 선정하였다. 보행 행태를 대변하는 변수로는 보행 빈도와 보행 시간 변수를 채택하였다. 분석 결과, 보행시간 모형이 빈도 모형보다 더 우수한 것으로 나타났다. 목적별로는 교육 목적 모형의 설명력이 가장 낮았으며 기타목적 모형은 다양한 특성이 혼재되어 있었다. 독립변수로는 개인, 가구 및 존 특성 변수가 고령 보행자 목적에 따라 각기 다른 영향을 끼치는 것으로 나타났다. 연령이 증가하거나 차량 및 운전면허를 보유한 사람은 보행활동이 감소하였다. 노유자 시설은 고령 보행자의 활동을 촉진하는 것으로 나타났으며 근린 및 업무시설은 업무 목적 보행 활동을 증가시켰다. 마지막으로 집약적 토지개발은 고령 보행자의 보행 활동을 감소시키는 것으로 나타나 향후 도시계획 관점에서 이를 고려해야할 필요성이 있다는 점을 도출하였다.

• 한국지능시스템학회논문지
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• 제21권1호
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• pp.42-48
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• 2011

본 논문은 비평탄 지형에서 능동형 보행보조기를 구동하고자 할 때, 바닥 지형에 의해 발생하는 보행의지 센서의 영향을 줄이기 위한 논문이다. 최근 보행보조기에 대한 관심이 증가되고 있으며, 외부 경사지형, 둔턱, 계단 등의 비평탄 지형에서도 안정적으로 차량을 이동시킬 수 있도록 고안된 능동형 보행보조기에 대한 연구가 진행되고 있다. 이러한 실외에서 사용되는 능동형 보행보조기에 있어 진동해석 및 비평탄 지형을 이동하면서 발생하는 기계적 충격을 줄일 수 있는 알고리즘의 개발은 능동형 보행보조기에 있어 해결해야 할 문제 중 하나이다. 이에 본 논문에서는 비평탄 지형에서의 진동을 해석할 수 있도록 가속도 센서를 적용하였으며, 둔턱을 넘을 때 발생하는 진동에 의해 보행의지 센서에 가해지는 진동에 의한 충격을 감쇠시킬 수 있는 알고리즘을 제안하였으며, 이를 실험을 통해 검증하였다.

• 지역사회간호학회지
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• 제31권1호
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• pp.65-75
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• 2020

Purpose: The purpose of this study was to identify the effect of regular Nordic walking exercise on the physical indicators and subjective happiness of middle-aged rural residents. Methods: A pretest and posttest design with a non-equivalent control group was conducted. The participants of experimental and control group were each 21 subjects from 40 to 64 years old. The Nordic walking exercise program consisted of 24 sessions which were focused on group exercise, and was conducted three times a week for eight weeks. Results: The experimental group showed significant decreases in body mass index (p=.042), body fat (p<.001), and abdominal fat (p=.026). The experimental group showed significant increases in muscle mass of right lower limb (p=.009) and left lower limb (p=.016) but was not statistically significant in right, left upper limbs and body. On the other hand, the control group showed significant decreases in muscle mass of right upper limb (p=.034), left upper limb (p=.038), and body (p=.034). There were no significant differences in systolic blood pressure, diastolic blood pressure, and subjective happiness between the experimental and the control group. Conclusion: The Nordic walking exercise should be actively encouraged to improve health of the middle-aged in rural area.

• 대한물리의학회지
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• 제5권4호
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• pp.543-549
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• 2010

Purpose : The study was designed to investigate the changes of plantar foot pressure by different loads during walking in flatfoot. Methods : Fifteen subjects with flatfoot were recruited along with their written informed consent. They were asked to walk on plate at a self-selected and comfortable speed with loads of 0, 5, 10, and 15kg. Three walking trials were obtained and then averaged for data analysis. Foot pressure were measured from RS-Scan system (RS-Scan system, RS scan Ltd., German) and contact area, maximum force were analyzed. Results : There were significant increases on midfoot and decreases on forefoot in contact area. And there were significant increases in maximum force of foot pressure of 2nd metatarsal bone and midfoot. Conclusion : These findings revealed that flatfoot increases risk factors of metatarsal bone with different loads. Therefore, patients of flatfoot must be careful during walking with loads or activities of daily living.

• 대한물리의학회지
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• 제5권3호
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• pp.445-453
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• 2010

Purpose : The purpose of this study was to investigate the effect of pelvic tilt exercise with changing the body position on foot contact pattern in the hemiplegic patients. Methods : Thirty seven hemiplegic patients were randomly divided 3 groups; control group (CG), sitting exercise group (SIEG) and standing exercise group (STEG). F-mat system and F-scan system were used for the measurement of foot contact pattern of hemiplegic side in walking. Data were analyzed statistically using paired t-test and one-way ANOVA. Results : The results were as follows : 1) Contact area of CG and SIEG were not significant difference in walking. Contact area of STEG was significant increased in walking. 2) Anteroposterior distance of COP of SIEG and STEG were significant increased in walking. Conclusion : These results suggest that pelvic tilt exercise in sitting and standing position are effective in the improvement of Anteroposterior distance of COP and gait stability are increased in only standing position.

• 대한물리치료과학회지
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• 제18권4호
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• pp.81-85
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• 2011

Purpose : The purpose of this study was to investigate the changing plantar foot pressure by the backpack load of 0, 10, 15, and 20% of their body weight while level walking in flat foot and so to recommend suitable backpack weight limitations for flat foot subjects. Method : 14 young flat foot subjects($24.29{\pm}2.16yrs$) participated in this study. the subjects were assigned to carry backpack load and there was four level walking modes : (1) unloaded walking(0%), (2) 10% body weight(BW) load, (3) 15% BW load and (4) 20% BW load. Repeated ANOVA was used to compare each region data of foot according to different backpack weight. Results : As backpack load became increased, the contact area of midfoot was significantly increased, and contact area of forefoot and rearfoot were significantly decreased. maximum pressure at each region during walking tended to be greater as the load increased, but a significant difference was found only for the heel medial and lateral regions Conclusion : Based on this data, the weight of backpack could influenced structure and function of the foot in flat foot.

• 성인간호학회지
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• 제28권3호
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• pp.266-278
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• 2016

Purpose: The purpose of this study was to identify the effects of reinforced walking exercise on dyspnea-fatigue symptoms, daily activities, walking ability and health related quality of life (HRQoL) in heart failure patients. Methods: This study used a randomized controlled trial design. The participants (experimental group=16, control group=25) were recruited from a university hospital in Kyeong-nam area. Data were collected from March to September, 2015. The reinforced walking exercise included goal setting and feedback (telephone and text message) provided for 12 weeks. Dyspnea-Fatigue Index, Korean Activity Scale/Index (KASI), six-minute walking distance (6MWD) and HRQoL were measured. Data were analyzed using descriptive statistics, t-test, Fisher's exact test, $x^2$ test, and Kolmogrove-Smirnov test. Results: Prior to the intervention there were no differences in the research variables between two groups. The exercise compliance in the experimental group was 100% (walking for 50 minutes per day, 5 times per week). The experimental group had improved dyspnea-fatigue symptoms (t=8.63, p<.001), daily activities (t=-4.92, p<.001), longer 6MWD (t=-5.66, p<.001), and increased HRQoL (t=-9.05, p<.001) compared to the control group. Conclusion: The reinforced walking exercise could be a cost-effective intervention in heart failure patient, which could enhance patients' outcomes, such as improving dyspnea-fatigue symptoms, daily activities, walking ability, and quality of life.

• 제어로봇시스템학회논문지
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• 제21권6호
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• pp.497-502
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• 2015

One of the goals in the field of mobile robotics is the development of personal service robots for the elderly which behave in populated environments. In this paper, we describe a security robot system and ongoing research results that minimize the risk of the elderly and the infirm to access an area to enter restricted areas with high potential for falls, such as stairs, steps, and wet floors. The proposed robot system surveys a potential falling area with an equipped laser scanner sensor. When it detects walking in elderly or infirm patients who in restricted areas, the robot calculates the velocity vector, plans its own path to forestall the patient in order to prevent them from heading to the restricted area and starts to move along the estimated trajectory. The walking human is assumed to be a point-object and projected onto a scanning plane to form a geometrical constraint equation that provides position data of the human based on the kinematics of the mobile robot. While moving, the robot continues these processes in order to adapt to the changing situation. After arriving at an opposite position to the human's walking direction, the robot advises them to change course. The simulation and experimental results of estimating and tracking of the human in the wrong direction with the mobile robot are presented.