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Related Concept Videos

Personal Protective Equipment01:20

Personal Protective Equipment

Personal protective equipment (PPE) is unique clothing or equipment worn by an employee to minimize or prevent exposure to infectious agents. PPE creates a barrier between the employee and the infectious materials. PPE must be readily available in the patient care area. PPE includes gloves, gowns and aprons, masks and respirators, goggles, face shields, shoes, and headcovers:
Survey Safety01:28

Survey Safety

Surveying near highways, rough terrain, or power lines involves significant risks. Working along highways is particularly dangerous and requires the use of warning signs and flagmen. It is safest to avoid working directly on roads and use offsets whenever possible. When highway work is unavoidable, it must follow all safety guidelines. Surveyors should wear bright clothing, such as orange reflective vests, to ensure visibility to motorists, coworkers, and hunters. In construction zones, wearing...
PPE Use in Healthcare Settings II: Doffing01:10

PPE Use in Healthcare Settings II: Doffing

The sequence of removing or doffing PPE starts with the gloves, as they are the most contaminated. Next is removal of the face shield or goggles, as they would interfere with removing other PPE. Then remove the gown, followed by the mask or respirator. Perform hand hygiene between steps if hands become contaminated and immediately after removing all PPE. Generally, the outside front and sleeves of the isolation gown, the goggles or the mask, the respirator, and the face shield are contaminated.
PPE Use in Healthcare Settings I: Donning01:22

PPE Use in Healthcare Settings I: Donning

Donning PPE must be completed before contact with the patient. This process protects from infectious agents. The sequence and action included in each donning are critical, and the steps must be systematic to avoid exposure to pathogens. The institutional policy also needs to be followed while donning PPE. The pre-donning preparations are gathering equipment, inspecting the PPE equipment for tears, holes, or damage, removing jewelry, removing any garments below the elbows, and tying the hair...
Design Example: Calculating Safe Diameter for Wind-Exposed Disc01:17

Design Example: Calculating Safe Diameter for Wind-Exposed Disc

Assessing safety in wind-exposed installations is crucial to preventing potential failures. This example explores the calculation and design adjustments needed to mount a circular disc on a building facade, where wind forces are a primary concern. A 4-meter diameter disc was initially designed as an aesthetic feature facing winds at a velocity of 25 meters per second, with an air density of 1.25 kilograms per cubic meter. Given these conditions, the drag force on the disc was determined using...
Otto and Diesel Cycle01:27

Otto and Diesel Cycle

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Related Experiment Video

Updated: Jun 5, 2026

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact
07:30

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact

Published on: September 21, 2017

Bicycle helmet use in Ottawa.

R Cushman, J Down, N Macmillan

    Canadian Family Physician Medecin De Famille Canadien
    |January 15, 2011
    PubMed
    Summary

    Cycling helmet use was low overall in 1988 Ottawa, with students showing the least protection. Young cyclists, aged 5-19, are most at risk for head injuries despite low helmet adoption.

    Area of Science:

    • Public Health
    • Epidemiology
    • Transportation Safety

    Background:

    • Cycling is a common activity with inherent risks, particularly head injuries.
    • Protective helmet use is a key factor in mitigating cycling-related trauma.
    • Understanding helmet usage patterns is crucial for targeted injury prevention strategies.

    Purpose of the Study:

    • To assess the prevalence of protective helmet use among cyclists in Ottawa.
    • To identify demographic groups with varying levels of helmet adoption.
    • To inform public health initiatives aimed at improving cycling safety.

    Main Methods:

    • Observational survey of 1963 cyclists in Ottawa during September 1988.
    • Categorization of cyclists into commuting, recreational, and student groups.

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    Modified Drop Tower Impact Tests for American Football Helmets

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    A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact
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    Published on: September 21, 2017

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  • Statistical analysis to determine helmet usage rates and significant differences between groups.
  • Main Results:

    • Overall helmet usage was 10.7% (211 out of 1963 cyclists).
    • Helmet use was highest among older commuting (17.9%) and recreational (14.3%) cyclists.
    • Student helmet use was significantly lower (1.9%), with elementary students showing the lowest rate (0.8%).

    Conclusions:

    • Children and young adults exhibit the lowest rates of cycling helmet use.
    • The 5-19 age group experiences the highest incidence of cycling injuries, especially head injuries.
    • There is a critical need to increase helmet adoption among young cyclists to reduce severe injuries.