• 한국방재안전학회논문집
• /
• 제6권1호
• /
• pp.79-86
• /
• 2013

본 논문은 안전한 보행환경 사업 대상지 선정지표 개선 방안을 위한 연구 과제로서, 그동안 차량 중심으로 도로 정책이 추진됨에 따라 최근 매년 2천명 이상의 보행자 사망사고가 발생하는 등 인간중심의 보행환경이 매우 열악한 실정으로 보행권이 심각하게 침해되어 왔다. 보행권은 공공의 안전보장, 질서 유지 및 복리 증진을 저해하지 않는 범위에서 국민이 쾌적한 보행환경에서 안전하고 편리하게 보행할 권리로서, 국가는 안전하고 편리하며, 쾌적한 환경을 마련해 주어야 할 의무가 있다. 최근 보행자 안전에 대한 관심이 증가되고 있으며, 안전하고 쾌적하며 건강한 보행환경 공간 조성을 위한 국가차원의 지원도 이루어지고 있다. 보행환경 불량 대상지에 대한 개선사업은 많은 비용이 수반됨에 따라 한정된 재원을 효율적으로 사용하여 최대한의 효과를 얻고 그 사업추진의 타당성에 대한 엄격한 사후평가가 이루어져야 한다. 그러나 현재 보행안전 및 편의증진에 관한 법률에 의거 보행환경 개선지구 지정의 법적근거는 마련되었으나, 안전한 보행환경 조성이라는 목적에 맞는 사업 대상지 선정지표는 마련되어 있지 못한 실정이다. 이에 본 연구에서는 그동안 연구되어온 안전한 보행환경 사업 대상지 선정 평가지표의 문제점을 검토하여 개선안을 제안하고자 하였다. 안전한 보행환경 조성이라는 사업목적에 맞게 사업대상지 선정 시에는 주민설문조사와 역사성을 평가지표에서 제외하고, 보행자 안전성과 보행환경 평가 이외에 보행공간 안전시설과 강풍 등 자연재난 및 잠재적 인적위험에 대한 재난 안전성 평가를 신설할 것을 제안하였다.

• 로봇학회논문지
• /
• 제5권4호
• /
• pp.294-301
• /
• 2010

In order to produce a convenient robot for the aged and the lower limb disabled, it is needed for the research detecting implicit walking intention and controlling robot by a user's intention. In this study, we developed sensor module system to control the walking- assist robot using FSR sensor and tilt sensor, and analyzed the signals being acquired from two sensors. The sensor module system consisted of the assist device control unit, communication unit by wire/wireless, information collection unit, information operation unit, and information processing PC which handles integrated processing of assist device control. The FSR sensors attached user's the palm and the soles of foot are sensing force/pressure signals from these areas and are used for detecting the walking intention and states. The tilt sensor acquires roll and pitch signal from area of vertebrae lumbales and reflects the pose of the upper limb. We could recognize the more detailed user's walking intention such as 'start walking', 'start of right or left foot forward', and 'stop walking' by the combination of FSR and tilt signals can recognize.

• 한국운동역학회지
• /
• 제16권4호
• /
• pp.61-71
• /
• 2006

The purpose of this study was to compare kinematic characteristics on the limbs at 3 different walking speed during the energy and the normal walking. Eight subjects performed energy walking and normal walking at the slow speed(65 beats/min), the normal speed(115beats/min), the fast speed(160 beats/min). The 3-d angle was calculated by vector projected with least squares solution with three-dimensional cinematography(Motion Analysis corporation). The range of motion was calculated on the trunk, shoulder, elbow, hip, knee joint. The results showed that stride length was no difference of the two walking pattern. The duration of support phase was also no difference of the two walking pattern. The range of motion of shoulder joint significantly increased in the sagittal and frontal planes, and the range of motion of elbow joint significantly increased as the energy walking. The range of motion of hip joint had no significant difference in the any planes in changing of walking speed. But the most remarkable difference of the two walking patterns revealed at the trunk. The range of flexion/extension angle had significant increasing $2.36^{\circ}$ at normal speed, and the range of the right/left flexion angle had significant increasing below $4^{\circ}$ at the 3 walking speed, and The range of rotation angle had significant increasing $7.35^{\circ}$, $9.22^{\circ}$, respectively at the normal and slow speed. But there was no significant difference of range of motion at the hip and knee joints between energy walking and normal walking.

• 전기학회논문지
• /
• 제62권4호
• /
• pp.536-543
• /
• 2013

In this paper, we propose a new type of hexapod robot that can walk fast. Most of the conventional hexapod robots are either rectangular type of hexagonal type. Those robots have drawbacks in the speed and stability of walking. The proposed robot has six legs, one fore leg, one hind leg, two left legs and two right legs. The proposed robot forms relatively wide supporting polygons along the walking direction, so it can walk very fast stably. We implemented the proposed hexapod robot and showed the feasibility of the robot by 3+3 walking experiment and 2+4 walking experiment.

• 패션비즈니스
• /
• 제8권6호
• /
• pp.78-89
• /
• 2004

With 100 collegians residing in Busan, a shoes wearing survey was held. Out of the subjects, 50 women collegians showing some interest in fashion sneakers were chosen to reveal the effects of shoes size changes on walking patterns and wearing sense. This study focused on the fitness of sneakers produced the following results: 1. Survey Results of Shoes Wearing The subjects had some room in wearing sneakers or athletic shoes, including $20{\sim}30mm$ (33%). Just 25% of the subjects reported about the experience of falling, and 67.6% had difficulty walking on downhills. 50% felt feet fatigue difference when wearing fitting and unfitting shoes. 2. Analysis of Walking Patterns & Survey Results of Wearing Sense No significance was found among shoes sizes in left and right step angles. Step width measurement revealed no significance among shoes sizes. Significance ($p{\le}.05$) existed among shoes sizes in steps and strides. Significance ($p{\le}.001$) was noticed among shoes sizes in wearing sense.

• 대한물리의학회지
• /
• 제7권4호
• /
• pp.471-480
• /
• 2012

PURPOSE: The object of the present study is to investigate the effects of the insole supporting medial longitudinal arch while walking in spastic cerebral palsy with pes planus. METHODS: Ten spastic bilateral cerebral palsy children with pes planus participated in this study. The insole were custom-made for the individual child. Muscle activity was measured by surface EMGs attached on tibialis anterior (TA), gastrocnemius (GA), vastus medialis oblique (VMO), biceps femoris long head (BF). temporal-spatial parameters such as velocity, step length, stride length, stance time, toe angle were collected while the subjects walked on the GAITRite system. RESULTS: The results of the present study were summarized as follows: 1. Muscle activities in mean EMGs while walking: Left VMO, Right TA, Left BF and GA revealed significant reductions after applying insole. 2. Muscle activities in peak EMGs while walking: Left TA and BF demonstrated reductions significantly after applying insole. 3. There were improvements in temporal-spatial gait parameters with insole: velocity, both step length, Right stride length and Right toe angle were increased(p<.05). CONCLUSION: Therefore the current study demonstrated that insole supporting the medial longitudinal arch would be effective on gait of the spastic cerebral palsy with pes planus.

• 대한물리의학회지
• /
• 제10권3호
• /
• pp.73-79
• /
• 2015

PURPOSE: This study aims to examine the impact of the location of a walker-aid pocket that is attached to the walker while walking. METHODS: The research subjects included 10 male adults and 10 elderly people. The subjects used a two-wheeled walker for the walking analysis, and a firm velcro-type pocket that can be attached to the walker aid was used for weight loading. The size of the external loads was set at 2kg, which corresponds to approximately 2.5% of the mean body weight of the subjects. The pocket was attached to the left, center, and right sides of the walker aid. Stride length, stride, step width, and time were investigated according to the location change. RESULTS: No statistical differences were observed in all the walking factors among the adults and elderly people regardless of the changes in the location of the walker pocket. In cases of no weight and the 2kg walker pocket, stride length and strides were longer for the adults, while the step width was greater and walking time was longer for the elderly people. CONCLUSION: The weight of the walker pocket turn out to retard walking speed, although the location of the walker pocket is not affect walking with the walker-aid.

• 한국운동역학회지
• /
• 제26권2호
• /
• pp.161-166
• /
• 2016

Objective: The purpose of this study was to determine the knee and ankle joint kinematics and kinetics by comparing downhill walking with valley-shape combined slope walking. Method: Eighteen healthy men participated in this study. A three-dimensional motion capture system equipped with eight infrared cameras and a synchronized force plate, which was embedded in the sloped walkway, was used. Obtained kinematic and kinetic parameters were compared using paired two-tailed Student's t-tests at a significance level of 0.05. Results: The knee flexion angle after the mid-stance phase, the mean peak knee flexion angle in the early swing phase, and the ankle mean peak dorsiflexion angle were greater during downhill walking compared with valley-shape combined slope walking (p < 0.001). Both the mean peak vertical ground reaction force (GRF) in the early stance phase and late stance phase during downhill walking were smaller than those values during valley-shape combined slope walking. (p = 0.007 and p < 0.001, respectively). The mean peak anterior GRF, appearing right after toe-off during downhill walking, was also smaller than that of valley-shape combined slope walking (p = 0.002). The mean peak knee extension moment and ankle plantar flexion moment in late stance phase during downhill walking were significantly smaller than those of valley-shape combined slope walking (p = 0.002 and p = 0.015, respectively). Conclusion: These results suggest that gait strategy was modified during valley-shape combined slope walking when compared with continuous downhill walking in order to gain the propulsion for lifting the body up the incline for foot clearance.

• 대한통합의학회지
• /
• 제9권3호
• /
• pp.135-144
• /
• 2021

Purpose : The purpose of this study was to investigate the effect of 2 weeks of backward walking exercise (BWE) on cervical angle and gait parameters in college students with forward head posture. Methods : Fifteen subjects participated in the experiment. All the participants had a craniovertebral angle (CVA) of 55 degrees or less. The purpose of the study was explained to all the subjects prior to participation, and volunteered to take part in the study. A camera capable of taking pictures of the lateral plane was installed at a distance of 1.5 meters from each subject. Images of forward head posture were obtained before and after performing the BWE, and the CVA and craniorotational angle (CRA) were compared pre- versus post exercise. Foot pressure and gait parameters (step length of left and right, stride length, stance of left and right, swing of left and right, step time of left and right, and stride time) were measured using a rehabilitation treadmill. The subjects performed the BWE for 2 weeks. The exercise program consisted of a 5-minute warm-up exercise, 20-minute main exercise, and 5-minute cool-down exercise. In the main exercise, the treadmill speed was set to 2.4 km/h in the first week and 3.4 km/h in the second week. A paired t test was used to compare the CVA and CRA and gait parameters before and after the exercise. Results : Comparison of the CVA and CRA before and after the BWE revealed a significant difference post exercise, with a marked improvement in forward head posture after the exercise (p<.05). Conclusion : Based on the results of this study, the BWE is considered to be an effective exercise for the forward head posture. Also, additional research is needed to shed light on the impact of the BWE on gait parameters.

• 대한기계학회논문집
• /
• 제14권6호
• /
• pp.1455-1463
• /
• 1990

In this study the feasibility of a dynamic gait for a given quadruped walking robot is investigated through a computer simulation of the walking with certain drivings of the actuators. Two planar inverted pendulums are used to represent the dynamic model of the leg of the walking robot. It's gait motion is assumed to be periodic and symmetric between left and right sides only with half cycle delay. The dynamics of the walking robot is simplified by introducing two virtual legs to produce two planar inverted pendulums in two orthogonal planes and on the basis that certain legs in pair act as one. The feasibility of the dynamic gait motion is established from the following two necessary conditions:(1) The position and velocity of a foot must satisfy the stroke and velocity requirements.(2) The gait motion should be periodic without falling down. The gait feasibility test was applied to a walking robot design showing the specific acceptable speed range of the robot in trot. Also it showed that the higher body height may produce the faster trot gait.