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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

2.5K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
2.5K
Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

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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...
762
Constant Pressure Calorimetry03:02

Constant Pressure Calorimetry

92.4K
Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
92.4K
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

1.4K
Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
1.4K
Assessing Body Temperature - Rectal01:27

Assessing Body Temperature - Rectal

8.0K
Rectal temperature measurement is considered the most precise method for assessing core body temperature and typically registers higher than oral temperature. For adults, the rectal thermometer should be inserted 1 to 1.5 inches into the rectum to obtain the most accurate reading.
Follow these steps for rectal temperature assessment:
Step 1: Perform hand hygiene and don clean gloves to prevent cross-infection.
Step 2: Position the patient in a side-lying position to better visualize the rectal...
8.0K
Thermosensation01:43

Thermosensation

32.7K
Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
32.7K

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Related Experiment Video

Updated: Oct 30, 2025

Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography
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Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography

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Fast and Localized Temperature Measurements During Simulated Earthquakes in Carbonate Rocks.

Stefano Aretusini1, Arántzazu Núñez-Cascajero2, Elena Spagnuolo1

  • 1Istituto Nazionale di Geofisica e Vulcanologia Roma Italy.

Geophysical Research Letters
|July 5, 2021
PubMed
Summary
This summary is machine-generated.

High-velocity friction experiments reveal fault strength and temperature evolution during seismic slip. New methods show temperatures up to 1,250°C, suggesting viscous creep mechanisms govern earthquake physics.

Keywords:
earthquakelaboratory experimentsoptical fibertemperature measurementviscous creep

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A Method for Studying the Temperature Dependence of Dynamic Fracture and Fragmentation
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Area of Science:

  • Geophysics
  • Seismology
  • Rock Mechanics

Background:

  • Understanding earthquake physics requires knowledge of fault strength and temperature evolution during seismic slip.
  • Previous experiments at seismic velocities (∼1 m/s) provided insights but lacked sufficient spatial and temporal resolution for accurate temperature measurements.

Purpose of the Study:

  • To investigate fault strength and temperature evolution at high slip velocities.
  • To improve the spatial and temporal resolution of temperature measurements during simulated seismic events.

Main Methods:

  • Conducted high-velocity friction experiments on Carrara marble under 20 MPa normal stress.
  • Utilized slip velocities of 0.3 and 6 m/s with 20 m total displacement.
  • Employed an optical fiber and two-color pyrometer to measure fault surface temperature at 1 kHz acquisition rate and ∼40 µm spatial resolution.

Main Results:

  • Measured temperatures up to 1,250°C on the fault surface.
  • Observed low coseismic fault shear strength.
  • Data indicates a correlation between high temperatures, low shear strength, and viscous creep mechanisms.

Conclusions:

  • High temperatures generated during seismic slip are linked to low fault strength.
  • The findings support the activation of grain size dependent viscous creep as a key mechanism in earthquake physics.
  • Improved measurement techniques are crucial for advancing our understanding of seismic processes.