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Movement Joints in Buildings01:27

Movement Joints in Buildings

Movement joints in buildings are essential design elements that accommodate inevitable motions caused by various factors such as temperature changes, moisture content variations, and structural deflections. These motions, if not considered in design and construction, can lead to unsightly or dangerous damage. Movement joints are incorporated in different forms to manage these stresses and allow materials to move without causing distress.
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Related Experiment Video

Updated: Jul 3, 2026

Evaluation of a Smartphone-based Human Activity Recognition System in a Daily Living Environment
06:49

Evaluation of a Smartphone-based Human Activity Recognition System in a Daily Living Environment

Published on: December 11, 2015

Mobility disability and the urban built environment.

Philippa Clarke1, Jennifer A Ailshire, Michael Bader

  • 1Institute for Social Research, University of Michigan, Ann Arbor, MI 48106-1248, USA. pjclarke@umich.edu

American Journal of Epidemiology
|August 1, 2008
PubMed
Summary
This summary is machine-generated.

Poor street conditions significantly increase mobility disability for older adults with severe lower extremity impairment. Improving street quality can slow or reverse the disablement process for at-risk populations.

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Last Updated: Jul 3, 2026

Evaluation of a Smartphone-based Human Activity Recognition System in a Daily Living Environment
06:49

Evaluation of a Smartphone-based Human Activity Recognition System in a Daily Living Environment

Published on: December 11, 2015

Area of Science:

  • Environmental gerontology
  • Public health
  • Urban planning

Background:

  • Research on the built environment's role in the impairment-to-disability pathway is limited.
  • Understanding how environmental factors influence mobility disability is crucial for aging populations.

Purpose of the Study:

  • To investigate the impact of built environment characteristics on mobility disability in older adults.
  • To examine this relationship based on the severity of lower extremity physical impairment.

Main Methods:

  • Utilized data from the Chicago Community Adult Health Study (2001-2003).
  • Assessed built environment characteristics (street and sidewalk quality) using systematic social observation.
  • Employed multinomial logistic regression analysis on 1,195 adults aged 45+.

Main Results:

  • Street conditions did not affect outdoor mobility in adults with mild or no physical impairment.
  • Adults with severe impairment faced over four times greater odds of severe mobility disability on streets in fair/poor condition.
  • Good street conditions attenuated the odds of mobility disability in those with lower extremity impairment.

Conclusions:

  • Built environment quality, specifically street condition, significantly exacerbates mobility disability in older adults with severe physical impairments.
  • Improving street quality offers a potential intervention to mitigate disability progression and enhance outdoor mobility for vulnerable older adults.
  • Targeted environmental modifications can slow or reverse the disablement process, promoting independent living.