Matches in SemOpenAlex for { <https://semopenalex.org/work/W2301473785> ?p ?o ?g. }
- W2301473785 abstract "This thesis presents experimental studies on the relationship between external surfacepressure and the perceived discomfort in seated body areas, in particular those underthe ischial tuberosity and the mid-thigh. It consists of three parts.Part one provides a comprehensive review of the existing knowledge concerningseated discomfort. The current assessment methods of seated discomfort aresummarised, with the emphasis on the validity and reliability of the rating scalemethods. The implications of surface pressure to seated people are outlined from theperspective of clinical, sensory and perceptual, and ergonomics domains. A briefreview of current technologies for pressure measurement is also provided.Part two presents the experimental work. It starts with an exploratory assessmentmodel of seated discomfort, based on pressure measures. Two preliminaryexperiments were conducted to test the feasibility of the model. Three furtherpsychophysical experiments were carried out to test the validity and reliability of theselected six rating scales, and to investigate the effects of surface pressure levels onperceived pressure intensity and discomfort in the seated mid-thigh and ischialtuberosity areas. Surface pressure stimuli were applied to a seated body area of 3,318mm2• Subjects judged three items of sensations: pressure intensity, local discomfort,and the overall discomfort. The main results are: I) A 50-point category partitioningscale was identified to be most sensitive and reliable for scaling pressure intensity anddiscomfort; 2) Sensations of pressure intensity and discomfort linearly increase withthe logarithm of the pressure stimulus level; 3) Thresholds for pressure intensity anddiscomfort in the seated ischium and thigh areas were derived; 4) The sensitivity ofintensity and discomfort to the stimuli differs between the locations .The mid-thigh ismore sensitive to surface pressure than the ischium. It is considered that this is due todifferences in load adaptation, body tissue composition and deformation; 5) Localpressure discomfort dominates the overall discomfort, and ratings of the localdiscomfort are higher than those of overall discomfort.Part three discusses the findings from this research. Four integration models of theoverall discomfort from local discomfort components were proposed. The WeightedAverage model asserts that the overall discomfort is a linear combination of localdiscomfort components, and that the weight of each local discomfort is the proportionof this component out of the arithmetic sum of all local discomfort components. Themechanisms of discomfort were analysed.The fundamental research presented herein uniquely contributes to the knowledge onthe human perception of seated pressure discomfort. Although this is not applicationbased, the findings contribute to the methods of seating comfort evaluation as well asprovide criteria by which seat designers may formulate design requirements." @default.
- W2301473785 created "2016-06-24" @default.
- W2301473785 creator A5088084366 @default.
- W2301473785 date "1994-01-01" @default.
- W2301473785 modified "2023-09-27" @default.
- W2301473785 title "Surface pressure and seated discomfort" @default.
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