• 한국CDE학회논문집
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• 제16권6호
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• pp.391-396
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• 2011

Gait is walking attitude and indicating state. The body's gait is a good mix in the center of body mechanics and exercises to wake up gently at the same time switch is a pass which is complicated at legs various joints. The shifting action what swing phase and stance phase rhythmic movement of body. One from piece moves with different dot. Especially plain walking and stair walking as a vehicle has been used frequently. Characteristics of the stair walking while the balanced the horizontal and vertical movement. Stair walking often takes place in everyday. It requires large range more than walking at plain in the moment and joint range of gait motion. And consistently applied to joints and various types of loads at legs joint may involve joint disorders. In this study, spastic cerebral palsy existing artificial limbs for disabled people when developing calibration equinus deformity patients induce muscle pain when walking on stairs independently, to reduce the research. Comparing the characteristics of the walking up the stairs for analysis patellofemoral joint pain as a result it is to provide engineering data.

• 한국운동역학회지
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• 제27권3호
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• pp.181-187
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• 2017

Objective: The aim of the study was to compare & analyze on the variations of ground reaction force during ascending and descending of bus stair. Method: Simulated wooden stair of bus (raiser: 37.66 cm, width: 109 cm, tread: 29 cm) and GRF system (AMTI-OR-7/ AMTI., USA) was set up within experimental room. Adult female (n=8) performed ascending & descending of simulated bus stair, and variables analyzed consisted of TT (transfer-time), PVF (peak vertical force), LR (loading rate), DR (decay rate), CV (coefficient of variation) and AI (asymmetry index). Sample data from GRF cut off at 1,000 Hz. Results: TT showed shortest variation at phase 1 during descending, but longest variation at phase 1 during ascending of stair. PVF19 (Fz2, 100%) showed large pattern during descending than that of ascending, but rather showed small pattern during ascending of stair in case of PVF2 (Fz4). LR showed larger pattern during descending than that of ascending, but rather during ascending of stair in case of DR. Variation of CV (%) did not show difference between LR and DR, but showed higher possible occurrence of variation during descending of stair. Also AI (%) showed higher index during ascending than that of descending of stair. Conclusion: Because introduction of lowered bus stair has various realistic problems, if lined up at designated bus stopage exactly, rather can solve problems of inconvenience, reduce impulsive force and secure a stability of COG during ascending & descending of stair.

• 가정과삶의질연구
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• 제27권4호
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• pp.55-66
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• 2009

Nearly a half of the accidents the old people had take place in home. Home safety will be more important than ever in rapidly increasing old aged in Korea. The purpose of this paper is to search the general characteristics of domestic accidents related to living environment of the old people experienced. The number of 248 respondents who had experienced of housing related accidents since recent 10 years were selected from 500 interviews with 65 years old and over during April 4th-26th, 2008. About a half of respondents had experienced home accidents. The entrance is the most common places the home accidents occurred, followed by bathrooms and stairs. flooring materials and raised floors are the most dangerous spots. Both places and dangerous objects are related each other. The place is also related to the type of dwelling. Slipping and tripping over most frequently happen in home accidents. It is related to the place like slipping in a bathroom or stairs, and tripping over in entrances. Mostly, legs and arms are injured by the home accidents. A safe home facilitates the old to live healthy and independent in their own places. A safe home for the old is a kind of new issues in Korea. Related policies and researches are about to sprout.

• 대한통합의학회지
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• 제2권3호
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• pp.57-63
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• 2014

Purpose : The purpose of this study was to identify the muscle activity of leg during stair down in the subjects with flatfoot and normal foot. Methods : The fourteen subjects with the flatfoot group and the fifteen subjects with the normal foot group volunteered for this study. All subjects descended the stairs that the height was 20cm and consisted 25 stairs. The target muscles for recording muscle activity were posterior fiber of gluteus medius, vastus medialis and vastus lateralis oblique, semitendinosus and biceps femoris, tibialis anterior, and medial and lateral fiber of gastrocnemius muscles. The muscle activity was recorded using the wireless EMG system. Results : The flatfoot group had significantly lower the muscle activity of posterior fiber of gluteus medius than the normal foot group in stance phase during stair down(p<.05). The flatfoot group had significantly higher the muscle activity of biceps femoris and tibialis anterior than the normal foot group in swing phase during stair down(p<.05). Conclusions : This study proposed that the subject with flatfoot should train the strengthening exercise for posterior fiber of gluteus medius.

• 보건교육건강증진학회지
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• 제22권4호
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• pp.203-213
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• 2005

Purpose: To assess the environmental hazards of falling accident in the homes of the elderly. Method: 222 homes of the elderly were assessed by the home environmental Checklist from May to July in 2003. Results: The mean score of home environmental hazards for fall were 13.19 with the highest score being 49, ranging from 4 to 24. The bathroom was the most hazardous place in the home, porch came next bedroom, kitchen, living room and stair followed them. The floor surface such as finishes and non-skid mats was the most hazardous interior factor in the home, using bathroom came next furniture and illumination followed them. The floor surface such as finishes and non-skid mats in the bathroom, kitchen, living room and porch, illumination of bedroom and stair were the most prevalent hazards in the home of interior. Of the 49 potential hazards, bathroom grab bar was the most prevalent one with 89.9%, and non-skid rugs in the porch, bathroom and kitchen, safety of dinner table, the threshold and furniture of porch, and illumination of bedroom were prevalent more than half of the home under assessing. Men, living in the separate house or villa with stairs were in more hazardous environments. Conclusion: To reduce the potential hazards of fall accident in the home, improving hazards relating to floor surface such as slip resistance surface and mats is important specially those of the separate house or villa with stairs.

• 한국환경보건학회지
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• 제31권1호
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• pp.94-98
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• 2005

This study was carried out to provide radon concentration and exposure in building. The average radon concentrations of building was measured 1.37 pCi/L in basement, 0.95 pCi/L in 1st layer, 0.74 pCi/L in 2nd layer, 0.56 pCi/L in 3rd layer, and 0.4 pCi/L in 4th layer, respectively. The average radon concentration of basement was measured the higher than any other stairs. Daily average distribution of radon concentrations in building shown that radon concentrations measured in morning at 8hr was the highest value. Monthly average distribution of radon concentrations shown 0.28 ${\pm}$ 0.17 pCi/L in April and 0.82 pCi/L in December that was the highest value. The average concentrations of radon was measured 0.38pCi/L in spring. 0.44 pCi/L in summer, 0.53 pCi/L in autumn, and 0.67 pCi/L in winter, respectively. This result shown that the average concentrations of radon in winter was the higher than any other seasons. That reasons was supposed that effect of number of exchanges and using air conditions was the higher in summer than winter.

• 복식
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• 제61권9호
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• pp.97-113
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• 2011

To develop the work clothes for the employees in the mechatronics industry in South Korea, a questionnaire survey on many aspects of the work clothes such as type, color, detailed design and function preference of the subject employees has been carried out in the study. The results throughout the survey highlighted certain functions such as extensibility, thermal and air permeability of importance for the work clothing performance. To improve the discomfort caused by some work motions (i.e. squatting down, ascending/descending the stairs, raising arms), more allowances were given to the measurements (i.e. body rise + 2cm and crotch depth + 1cm for squatting down pose; thigh circumference + 1cm and knee circumference + 1cm for ascending/ descending the stairs pose; chest circumference + 5~6cm and jumper length to the level of hip circumference line for raising arms pose) for work clothes patternmaking. The evaluation of the two types of spring/summer and winter work clothes' clothing comfort and wearer mobility suggested certain points to improve the clothing performance (e.g. ventilation slits on the back pleats, arm pits and collar band of the spring/summer suit using net material and lining for the winter suit using quilted thermal materials) and wearer mobility (e.g. pants hem buckles for the easy work motion), which also enabled to fulfill the workers' work clothes design preference.

• International Journal of Precision Engineering and Manufacturing
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• 제9권1호
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• pp.30-33
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• 2008

Understanding the characteristics of amputee gait is key in developing more advanced prostheses. The aim of this study was to quantitatively analyze a stair-climbing task for transfemoral amputees with a prosthesis and to predict the muscle forces and joint moments at musculoskeletal joints using a dynamic analysis. A three-dimensional musculoskeletal model of the lower extremities was constructed from a gait analysis using transformation software for two transfemoral amputees and ten healthy people. The measured ground reaction forces and kinematical data of each joint from the gait analysis were used as input data for an inverse dynamic analysis. Dynamic analyses of an transfemoral amputee climbing stairs were performed using musculoskeletal models. The results showed that the summed muscle forces of the hip extensor of an amputated leg were greater than those of a sound leg. The opposite was true at the hip abductor and knee flexor of an amputated leg. We also found that higher moments at the hip and knee joints of the sound leg were required to overcome the flexion moment caused by the body weight and amputated leg. Dynamic analyses using musculoskeletal models may be a useful means to predict muscle forces and joint moments for specific motion tasks related to rehabilitation therapy.

• 한국환경보건학회지
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• 제5권1호
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• pp.40-45
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• 1978

We have selected 36 schools of a total of night high schools for boys and girls in seoul and measured intensity of illumination of the classroom, The corridors and the stairs that students study and live, with priority given to an illumination, a primary factor of environmental sanitation of school following is the result. 1. The maximum average intensity of illumination of the classroom is 93.2 Lux, and the minimum average intensity of illumination 39.5 Lux. Mean$\pm$S, is 59.03$\pm$22.8 Lux 2. The maximum average intensity of illumination of the corridor is 39.2 Lux, and the minimum average intensity of illumination 11.1 Lux. 3. The maximum average intensity of illumination of the stair is 11.58 Lux, and the minimum average intensity, of illumination 4.92 Lux, mean$\pm$S.D is 7.88$\pm$10.0Lux. 4. Schools with tile illumination facilities more than 50 Lux are 63.8% and less than 50 Lux are 36.2%. 5. Schools with 9-11 facilities of a source of light per classroom by a fluorescent lamp are the most as 30.50%. 6. As for the corridor, schools with the illumination equipment less than 10 Lux are 27.8%, are more than 10 Lux 72.2% 7. As for the stairs schools with the illumination equipment less than 10 Lux are 77.8%, and more than 10 Lux 10 Lux 22.2%.

• Nuclear Engineering and Technology
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• 제27권5호
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• pp.661-669
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• 1995

원자력시설에서 점검 및 보수작업을 위하여 이동로보트 KAEROT을 개발하였다. 이동로보트의 주행장치는 소차륜들이 부착된 유성차륜의 형태로 구성되어 높은 안정성을 유지하며 계단을 포함한 많은 장애물의 승하강이 가능하도록 설계하였다 본 논문에서는 로보트의 원격조작을 용이하게 하기 위하여 이동로보트의 기구학적 해석을 통하여 역기구학 해를 구하였고, 자동 계단승월 알고리즘을 제안하였다. 제안된 알고리즘은 이동경로를 결정한 후 제안된 기준경로를 추종할 수 있도록 각 차륜의 각속도를 구하는 것이다. 제작 오차가 있는 실험실내 계단에 대하여 시뮬레이션 및 실험을 수행하였다. 제안된 알고리즘은 로보트 몸체의 경사각도를 낮게 유지시킬 수 있었고, 주행중 안정성을 높혀주었다.