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Human and environmental factors cont...
~
Burnfield, Judith Marie.
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Human and environmental factors contributing to slip events during walking.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Human and environmental factors contributing to slip events during walking./
作者:
Burnfield, Judith Marie.
面頁冊數:
105 p.
附註:
Source: Dissertation Abstracts International, Volume: 64-12, Section: B, page: 6046.
Contained By:
Dissertation Abstracts International64-12B.
標題:
Health Sciences, Recreation. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3116673
Human and environmental factors contributing to slip events during walking.
Burnfield, Judith Marie.
Human and environmental factors contributing to slip events during walking.
- 105 p.
Source: Dissertation Abstracts International, Volume: 64-12, Section: B, page: 6046.
Thesis (Ph.D.)--University of Southern California, 2003.
During walking, slips are likely to occur when an individual's utilized coefficient (COFU) exceeds the friction available on the floor surface. To better understand human and environmental factors that predispose an individual to slip onset, three investigations were undertaken.Subjects--Topical Terms:
1018003
Health Sciences, Recreation.
Human and environmental factors contributing to slip events during walking.
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Source: Dissertation Abstracts International, Volume: 64-12, Section: B, page: 6046.
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Thesis (Ph.D.)--University of Southern California, 2003.
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During walking, slips are likely to occur when an individual's utilized coefficient (COFU) exceeds the friction available on the floor surface. To better understand human and environmental factors that predispose an individual to slip onset, three investigations were undertaken.
520
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The first study evaluated the influence of age and gender on COF U during walking. Sixty healthy adults were divided into three groups: Young (20--39 y.o.); Middle-aged (40--59 y.o.); and Senior (60--79 y.o.). Ground reaction forces, recorded as subjects walked at three pre-determined speeds, were used to calculate peak COFU during weight acceptance. Averaged across age groups, females had higher peak COFU than males while walking slowly, while males had higher peak COFU than females while walking fast. Averaged between genders, middle-aged subject's peak COFU was higher at the medium speed than both young and senior subjects, and than senior subjects at the fast speed.
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The second investigation determined the extent to which center of mass (CM) kinematics could be used to predict peak COFU during level walking. Ground reaction forces and full-body kinematic data were recorded simultaneously as forty-nine healthy young adults walked. Greater CM to center of pressure angles of inclination and faster velocity of the CM in the anterior direction were associated with higher peak COFU. Combined, these two variables explained 62% of the variance in peak COFU.
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The third investigation identified the probability of a slip occurring based on the relationship between static measures of floor surface slip resistance and an individual's peak COFU. Video, kinematic, and ground reaction force data were recorded simultaneously as fifty-two subjects traversed a walkway during conditions of normal and reduced floor surface slip resistance. Knowledge of the available static slip resistance, in combination with an individual's COFU allowed for a prediction of slips accuracy rate of 89.5%.
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Collectively, the data generated from this research will be used to identify persons and/or situations posing the greatest risk for slip onset. An understanding of the interaction between these human and environmental factors could serve as a basis for proactive human or environmental interventions to reduce the risk of injurious outcomes.
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