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Related Concept Videos

Quantifying Heat02:46

Quantifying Heat

Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a higher temperature. When the atoms and...
Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.  
Step 3: Assess the patient's forehead...
Heat Flow and Specific Heat01:12

Heat Flow and Specific Heat

Heat is a type of energy transfer that is caused by a temperature difference, and it can change the temperature of an object. Since heat is a form of energy, its SI unit is the joule (J). Another common unit of energy often used for heat is the calorie (cal), which is defined as the energy needed to change the temperature of 1 g of water by 1 °C, specifically between 14.5 °C and 15.5 °C, since the energy needed shows a slight temperature dependence. Another commonly used unit is the kilocalorie...
Assessing Body Temperature - Axilla01:14

Assessing Body Temperature - Axilla

Procedural Guide for Assessing Axillary Body Temperature using a Digital Thermometer:
Step 1: Perform hand hygiene and put on clean gloves to maintain infection control and prevent cross-contamination.
Step 2: Prepare the patient by explaining the procedure to ensure understanding and cooperation. Ensure privacy, expose the axilla, and inform the patient that minimal movement is crucial for an accurate reading.
Step 3: Adjust the patient’s clothing to expose only the axilla. It minimizes...
Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
Thermal Stress01:09

Thermal Stress

If the temperature of an object is changed while it is prevented from expanding or contracting, the object is subjected to stress. The stress is compressive if the object expands in the absence of constraint and tensile if it contracts. This stress resulting from temperature change is known as thermal stress. It can be quite large and can cause damage. To avoid this stress, engineers may design components so they can expand and contract freely. For instance, on highways, gaps are deliberately...

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Related Experiment Video

Updated: May 25, 2026

Quantitative Visualization and Detection of Skin Cancer Using Dynamic Thermal Imaging
06:08

Quantitative Visualization and Detection of Skin Cancer Using Dynamic Thermal Imaging

Published on: May 5, 2011

A spatio-temporal index for heat vulnerability assessment.

Suzanne E Kershaw1, Andrew A Millward

  • 1Department of Geography, Ryerson University, Toronto, ON, Canada, M5B 2K3. szkershaw@gmail.com

Environmental Monitoring and Assessment
|January 25, 2012
PubMed
Summary

Extreme heat poses significant public health risks in cities. This study maps heat stress using apparent temperature and exposure duration, identifying Toronto

Area of Science:

  • Environmental science
  • Public health
  • Urban planning

Background:

  • Extreme heat events disproportionately affect densely populated metropolitan areas.
  • The urban heat island effect intensifies heat exposure in cities.
  • High population density and urban heat islands exacerbate heat-related public health risks.

Purpose of the Study:

  • To develop and apply a method for mapping human heat stress in urban environments.
  • To integrate apparent temperature and exposure duration into a single metric for heat vulnerability assessment.
  • To identify areas within the Greater Toronto Area at high risk of prolonged heat exposure.

Main Methods:

  • Utilized ordinary kriging to generate hourly apparent temperature prediction maps.
  • Combined meteorological data (temperature and relative humidity) from 65 locations.

Related Experiment Videos

Last Updated: May 25, 2026

Quantitative Visualization and Detection of Skin Cancer Using Dynamic Thermal Imaging
06:08

Quantitative Visualization and Detection of Skin Cancer Using Dynamic Thermal Imaging

Published on: May 5, 2011

  • Integrated apparent temperature and exposure duration to calculate humidex degree hours (HDH).

    • Main Results:

    • Demonstrated significant differences in apparent temperature between built and natural environments, especially at night.
    • Identified the downtown Toronto core and parts of Mississauga as areas likely to experience hazardous heat stress levels (HDH ≥ 72).
    • Revealed spatial variations in heat exposure during extreme heat alert days.

    Conclusions:

    • Apparent temperature and exposure duration are critical factors for assessing heat vulnerability.
    • Humidex degree hours (HDH) provide a unified metric for evaluating heat risk.
    • Recommends the use of spatially explicit tools like HDH for public health officials to manage heat-related risks.