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Related Concept Videos

Sight Distance in a Vertical Curve01:29

Sight Distance in a Vertical Curve

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Sight distance on vertical curves is critical in roadway design. It ensures drivers can see far enough ahead to identify and respond to hazards effectively. This directly impacts safety, driver comfort, and the overall efficiency of the transportation network.Vertical curves are classified into crest and sag curves based on their geometry. For crest curves, sight distance is determined by the line of sight between a driver's eye and a small object on the road's surface. Design parameters for...
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Vertical Curve: Problem Solving01:23

Vertical Curve: Problem Solving

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Vertical curves provide the transition between two roadway grades, ensuring safety, comfort, and functionality. Calculating elevations at specific stations along the curve involves several systematic steps based on the curve's geometry and provided design parameters.The vertical curve is defined by its length, grades, Point of Vertical Intersection (P.V.I.) location, and P.V.I. elevation. The stations of the Point of Vertical Curvature (P.V.C.), where the curve begins, and the Point of Vertical...
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Equation of the Elastic Curve01:23

Equation of the Elastic Curve

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The concept of curvature in plane curves, crucial in structural engineering, defines how sharply a beam bends under load. This curvature is determined using the curve's first and second derivatives.
Consider a cantilever beam with a point load at its free end (for instance, a diving board). When analyzing beam deflection with small slopes, the shape of the beam's elastic curve becomes key. The governing equation for this analysis involves the bending moment and the beam's flexural...
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Elastic Curve from the Load Distribution01:16

Elastic Curve from the Load Distribution

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The structural behavior of beams under distributed loads is critical for engineering analysis, which focuses on predicting how beams bend and react under such conditions. Different types of beams (e.g., cantilever, supported, or overhanging) behave differently under distributed load conditions.
For all beams, the analysis of the beam's reaction to distributed loads begins by understanding the relationship between a beam's load and the resulting shear forces and bending moments.
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Horizontal Curve: Problem Solving01:03

Horizontal Curve: Problem Solving

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A horizontal curve is characterized by its radius, intersection angle, and stationing of key points. In this case, the radius is 400 meters, and the angle of intersection is 30 degrees, with the station of the point of curvature (P.C.) at 0 + 150 meters. The goal is to determine the station values at the point of intersection (P.I.), point of tangency (P.T.), and midpoint of the curve, as well as the length of the long chord.The process begins with calculating the tangent distance (T) and the...
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Introduction to Vertical Curves01:24

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197
Vertical curves are parabolic transitions that connect different grades on highways and railroads, ensuring a smooth alignment between back and forward tangents. The back tangent represents the initial grade, while the forward tangent defines the subsequent grade. These curves can be symmetrical, with equal tangent lengths, or nonsymmetrical, with varying lengths. The key points defining a vertical curve include the Point of Vertical Intersection (P.V.I.), where the tangents meet; the Point of...
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Related Experiment Video

Updated: Sep 29, 2025

A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance
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Disability: leaning away from the curve.

Edwin Jesudason

    Journal of Medical Ethics
    |March 24, 2022
    PubMed
    Summary

    This study advocates for a broader understanding of disability, moving beyond individual capabilities to societal factors. It applies biopsychosocial models and language philosophy to re-evaluate disability definitions and critiques current medical and statistical approaches.

    Area of Science:

    • Disability Studies
    • Philosophy of Medicine
    • Sociology of Health

    Background:

    • Current definitions of disability often focus narrowly on individual capabilities.
    • There is a need to incorporate broader societal and political perspectives into understanding disability.
    • Existing frameworks may oversimplify disability through statistical models like bell curves.

    Purpose of the Study:

    • To encourage a more inclusive consideration of disability.
    • To explore alternative theoretical frameworks for defining and understanding disability.
    • To critique existing approaches to disability, including terminology and statistical representations.

    Main Methods:

    • Application of Engel's biopsychosocial model to disability identity.
    • Analysis of the philosophy of language concerning disability definitions.
    Keywords:
    DisabilityGender Identity

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  • Sociopolitical critique of medicalization, drawing on Foucault and Illich.
  • Review and critique of statistical methods (e.g., bell curves) and terminology used in disability studies.

    • Main Results:

    • The biopsychosocial model offers a robust framework for understanding disability identity.
    • Language and naming conventions significantly influence perceptions of disability.
    • Sociopolitical context is crucial in determining who is labeled disabled and why.
    • The use of bell curves and 'capacity spaces' may inadequately represent the complexity of disability.

    Conclusions:

    • Disability is best understood through a lens that integrates individual, social, and political dimensions.
    • Re-evaluating the language and frameworks used to define disability is essential for inclusivity.
    • A critical examination of medical and statistical paradigms is necessary to challenge existing power structures in disability assessment.