Settling down time following initial sitting and its relationship with comfort and discomfort

Cascioli, V.; Liu, Zhuofu; Heusch, Andrew I.; McCarthy, Peter W.

doi:10.1016/j.jtv.2011.05.001

Cited by 14 publications

(9 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These studies have shown that postural variables affect internal physiological conditions, subjective comfort ratings and productivity [10]. Several studies have suggested that the shape and firmness of the surface at the seat interface can affect the perception of sitting comfort [11]. Most research studies focus on wheelchair users, like patients with spinal cord injuries, who cannot move their body freely and stay on the chair for a long time.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effects of the seat cushion contour and the sitting posture on surface pressure distribution and comfort during seated work

Li¹,

Mo²,

Yu³

et al. 2020

Int J Occup Med Environ Health

View full text Add to dashboard Cite

The purpose of this paper is to investigate the effects of the seat cushion contour and the sitting posture on the seat pan interface pressure distribution and subjective comfort perception. Material and Methods: Overall, 16 volunteers typed a text passage on a laptop while seated, by assuming 3 kinds of common sitting postures (forward, relaxed and upright) in 4 seat cushion configurations: chair only, and chair with 1 of 3 supplementary cushions. Pressure data and cushion comfort ratings were collected in the experiment. Results: It was found that the sitting posture and the seat cushion contour had different impacts on surface pressure. The seat cushion contour had an impact on pressure parameters and pressure distribution on the seat pan, while the sitting posture affected the location of peak pressure on the seat pan. The correlation analysis revealed that the subjective comfort rating was significantly correlated with average pressure (AP) and mean peak pressure (MPP). Conclusions: The conclusion was that the cushion contour had a greater effect on seat pan interface pressure parameters than the sitting posture. Notably, AP and MPP can be indicators for assessing seat cushion comfort in a short-term perspective.

show abstract

Section: Introductionmentioning

confidence: 99%

“…A correlation analysis of pressure parameters and subjective comfort ratings in the study conducted on 16 volunteers in the ergonomics lab at the Department of Industrial Design, Northwestern Polytechnical University, Xi'an, China, June[6][7][8][9][10][11] 2018 …”

mentioning

confidence: 99%

The effects of the seat cushion contour and the sitting posture on surface pressure distribution and comfort during seated work

Li¹,

Mo²,

Yu³

et al. 2020

Int J Occup Med Environ Health

View full text Add to dashboard Cite

show abstract

“…FSRs have been employed in numerous biomechanical applications from prosthetic control and pressure measurements (Hebert et al, 2014; Junaid et al, 2014; Silver-Thorn et al, 1996) through gait studies (Moon et al, 2011; Rueterbories et al, 2010) and telerobotics (Yun et al, 1997) among many other biomechanical applications quantifying interface mechanics (Cascioli et al, 2011; Di Fazio et al, 2011). …”

Section: Introductionmentioning

confidence: 99%

The effect of biomechanical variables on force sensitive resistor error: Implications for calibration and improved accuracy

Schofield

Evans

Hebert

et al. 2016

Journal of Biomechanics

View full text Add to dashboard Cite

Force Sensitive Resistors (FSRs) are commercially available thin film polymer sensors commonly employed in a multitude of biomechanical measurement environments. Reasons for such wide spread usage lie in the versatility, small profile, and low cost of these sensors. Yet FSRs have limitations. It is commonly accepted that temperature, curvature and biological tissue compliance may impact sensor conductance and resulting force readings. The effect of these variables and degree to which they interact has yet to be comprehensively investigated and quantified. This work systematically assesses varying levels of temperature, sensor curvature and surface compliance using a full factorial design-of-experiments approach. Three models of Interlink FSRs were evaluated. Calibration equations under 12 unique combinations of temperature, curvature and compliance were determined for each sensor. Root mean squared error, mean absolute error, and maximum error were quantified as measures of the impact these thermo/mechanical factors have on sensor performance. It was found that all three variables have the potential to affect FSR calibration curves. The FSR model and corresponding sensor geometry are sensitive to these three mechanical factors at varying levels. Experimental results suggest that reducing sensor error requires calibration of each sensor in an environment as close to its intended use as possible and if multiple FSRs are used in a system, they must be calibrated independently.

show abstract

“…Prolonged sitting leads to the increased potential for skin maceration because of humidity build up [2][3][4][5] and increased friction between the person and seat or support surface [6][7][8][9][10][11] consequently skin damage is more likely. Some studies have indicated that body humidity could be an important property to investigate in order to understand the microclimate of the sitting interface between a person and seat surface [3,4,[12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Testing the reliability of humidity sensors through prolonged measurements traceable to calibration standards

Nair

McCarthy

Heusch

et al. 2015

17th International Congress of Metrology

View full text Add to dashboard Cite

This study looked at the accuracy of relative humidity sensors over a seven-month period at five locations. They were subjected to monthly traceable calibration in a climate-controlled chamber. We found the calibration output variance within sensors was smaller (0.4 ± 0.2 %RH: n= 5 sensors, each of which was exposed to nine humidity levels in the climatic chamber) than the manufacturers specifications (± 3.5 %RH). The study found differences in sensor output variance, which might be related to their working environment. Powered sensors in low ambient RH environments showed minimal differences over time (p > 0.05) when compared to powered sensors exposed to higher humidity environments (p < 0.05). To the author's knowledge, there have been no previous reports on stability of calibration of humidity sensors over prolonged periods (seven months). This work gives the first indication of stability in relation to environmental conditions of use. It can be concluded that sensors should obtain regular recalibration if used continually (suggested every 6 months), however those in higher humidity environments appear to require more frequent re-calibration (approximately every 3 months).

show abstract

Settling down time following initial sitting and its relationship with comfort and discomfort

Cited by 14 publications

References 58 publications

The effects of the seat cushion contour and the sitting posture on surface pressure distribution and comfort during seated work

The effects of the seat cushion contour and the sitting posture on surface pressure distribution and comfort during seated work

The effect of biomechanical variables on force sensitive resistor error: Implications for calibration and improved accuracy

Testing the reliability of humidity sensors through prolonged measurements traceable to calibration standards

Contact Info

Product

Resources

About