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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Can a point-of-decision-prompt intervention increase stair use? an analysis of a community intervention /

Luchini, Alyson. January 2009 (has links)
Thesis (M.P.H.)--University of Wisconsin--La Crosse, 2009. / Includes bibliographical references (leaves 68-71).
2

Can a point-of-decision-prompt intervention increase stair use? an analysis of a community intervention /

Luchini, Alyson. January 2009 (has links)
Thesis (M.P.H.)--University of Wisconsin -- La Crosse, 2009. / Includes bibliographical references (leaves 68-71)
3

Does my step look big in this? A visual illusion leads to safer stepping behaviour.

Elliott, David B., Vale, Anna, Whitaker, David J., Buckley, John G. January 2009 (has links)
Background. Tripping is a common factor in falls and a typical safety strategy to avoid tripping on steps or stairs is to increase foot clearance over the step edge. In the present study we asked whether the perceived height of a step could be increased using a visual illusion and whether this would lead to the adoption of a safer stepping strategy, in terms of greater foot clearance over the step edge. The study also addressed the controversial question of whether motor actions are dissociated from visual perception. Methodology/Principal Findings. 21 young, healthy subjects perceived the step to be higher in a configuration of the horizontal-vertical illusion compared to a reverse configuration (p = 0.01). During a simple stepping task, maximum toe elevation changed by an amount corresponding to the size of the visual illusion (p<0.001). Linear regression analyses showed highly significant associations between perceived step height and maximum toe elevation for all conditions. Conclusions/Significance. The perceived height of a step can be manipulated using a simple visual illusion, leading to the adoption of a safer stepping strategy in terms of greater foot clearance over a step edge. In addition, the strong link found between perception of a visual illusion and visuomotor action provides additional support to the view that the original, controversial proposal by Goodale and Milner (1992) of two separate and distinct visual streams for perception and visuomotor action should be re-evaluated. / College of Optometrists
4

The Effects of Varying Speed on the Biomechanics of Stair Ascending and Descending in Healthy Young Adults: Inverse Kinematics, Inverse Dynamics, Electromyography and a Pilot Study for Computational Muscle Control and Forward Dynamics

Routson, Rebecca Linn 22 October 2010 (has links)
No description available.
5

STRENGTH REQUIREMENTS AND ENERGY EFFICIENCY OF DIFFERENT STAIR-STEPPING STRATEGIES IN PERSONS WITH CHRONIC STROKE AND HEALTHY ADULTS

Ridgway, Heather 01 October 2013 (has links)
The majority of stroke survivors return to living in the community; however, muscle weakness and cardiovascular deconditioning can restrict mobility, limit community access and independence, particularly when challenging activities like stair negotiation are involved. A “step-by-step” (SBS) strategy (both feet per step) may be adopted in lieu of a “step-over-step” (SOS) method (one foot per step) to increase stability and off-load the paretic limb though the physical demands of the two methods are unknown. The main objective of this thesis was to investigate the strength and energy demands of the two stair-stepping strategies in chronic stroke compared to healthy adults. The first study identified the relative strength and aerobic demands of both strategies. The results showed that the stroke group produced similar peak joint moments compared to controls, despite their slower cadence suggesting that the stroke group exerts comparable ‘effort’ to move more slowly. The SBS method was associated with lower strength costs (relative to individuals’ maximum strength output) than SOS, however aerobic cost was significantly higher. The second study identified the mechanical energy expenditures (MEEs) and transfers related to both strategies. The MEEs were found to be lower when the SBS strategy was used. Though expenditures were similar between groups, the stroke group had higher expenditures associated with the work of the less affected knee extensors (lead limb) during ascent and descent and controls exhibited higher expenditures for the plantarflexors during ascent. The reduced output of the trail (affected) limb plantarflexors likely resulted in the increased workload of the knee extensors. Overall, the aerobic cost per step was higher in stroke, particularly during descent, suggesting that in addition to reducing cadence, persons with stroke may be co-contracting to increase stabilization during descent, thus increasing oxygen demands. This thesis provides novel information on the physical demands associated with two methods of stair negotiation demonstrating that the SBS strategy might be better suited to persons with chronic stroke by minimizing the strength demands on the paretic side, but the benefit comes at an elevated aerobic cost. This information is valuable to rehabilitation professionals engaged in retraining mobility to facilitate community reintegration. / Thesis (Master, Rehabilitation Science) -- Queen's University, 2013-09-30 13:42:08.209
6

Laiptų ir pandusų, esančių pastatų išorėje, ergonominis tyrimas / Ergonomical analysis of the staircases and ramps in the buildings outdoors

Marčiulaitytė, Lina 20 June 2006 (has links)
The aim of this finishing work is carry out ergonomical analysis of stairs and ramps in the buildings outside. Performing analysis it was taken measurements of these elements similarly comparing them with measurements given in the Standard documents. The aim of this work is to evaluate as buildings admissions are fitted for people comfortable using them and offer conclusions and suggestions. In this work is analyzing material giving in the standards furthermore stairs and ramps fitting for peoples with wheelchairs.
7

Human induced loading on staircases

Kerr, Stuart Clifford January 1998 (has links)
Over the last decade it has become increasingly popular to provide large public areas with gracefully designed 'flexible' staircases. One inherent characteristic of this type of construction is a low stiffness to mass ratio and hence a low natural frequency when compared to more traditional designs. A number of staircases have been found to be dynamically responsive to pedestrian traffic resulting in costly repairs. The objective of this thesis was to investigate the differences between human induced loading on floors with that on stairs. Experimental work carried out on a purpose built staircase showed that forces up to 3 times the static body weight were generated during fast descents while forces up to 2.5 times the static body weight were generated during fast ascents. The work also showed that first harmonic values generated while ascending were slightly higher than for descending whilst second harmonic values were up to 3 times greater for fast descents than for fast ascents. When compared with floor testing, stair testing produced first harmonic values nearly 2.5 times greater with second, third and fourth harmonic values nearly 3 times greater. The harmonic results for the flat testing were also incorporated into a new mathematical expression to predict peak accelerations on simply supported floors and footbridges. The experimental results were duplicated analytically by developing a computer program to calculate the vertical ground reaction forces from body segment positional data. Following a Newtonian approach, the predicted first harmonic values were 20% to 30% lower than actual while the second harmonic values were approximately the same. Monte Carlo simulation techniques were also used to model the effects of group loading on stairs. The simulations predicted enhancement factors (a multiplier on single subject loading) of 3 to 6 for smaller groups(< 9 people) and 4 for larger groups(> 25 people). If the experimental/analytical results are combined with the group loading predictions, the harmonic values for groups ascending or descending flexible staircase could be substantially increased. These results demonstrate that loading data from floors is highly inappropriate for staircase design.
8

An evaluation of mounting steps and handrail dimensions on high profile vehicles

Kim, Dae-Sig. January 1993 (has links)
Thesis (M.S.)--Ohio University, March, 1993. / Title from PDF t.p.
9

Trajectory tracking control and stair climbing stabilization of a skid-steered mobile robot

Terupally, Chandrakanth Reddy. January 2006 (has links)
Thesis (M.S.)--Ohio University, November, 2006. / Title from PDF t.p. Includes bibliographical references.
10

Decreasing elevator travel in women with sign prompts encouraging stair use

Mura, Matthew S. January 2005 (has links) (PDF)
Thesis (M.S.)--Georgia Southern University, 2005. / "A thesis submitted to the Graduate Faculty of Georgia Southern University in partial fulfillment of the requirements for the degree Master of Science" ETD. Includes bibliographical references (p. 36-39) and appendices.

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