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Related Concept Videos

Thermoregulation01:26

Thermoregulation

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The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
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Thermosensation01:43

Thermosensation

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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...
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Homeostatic Imbalances in Body Temperature01:19

Homeostatic Imbalances in Body Temperature

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Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...
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Thermal Insulation in Masonry Walls01:22

Thermal Insulation in Masonry Walls

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In hot, dry climates, the thermal mass of masonry walls can be beneficial, absorbing heat during the day and releasing it at night, thereby stabilizing indoor temperatures. However, in most other climates, additional insulation is necessary to enhance thermal resistance.
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh....
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Assessing Body Temperature - Tympanic membrane01:14

Assessing Body Temperature - Tympanic membrane

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Assessing tympanic membrane temperature involves using a tympanic membrane thermometer (TMT). Here is a step-by-step guide:
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Step 3: Slide the probe cover in place to prevent cross-contamination.
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Heating and Cooling Curves02:44

Heating and Cooling Curves

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When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance,...
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The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements
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A Low-Voltage Multi-Band Tunable Smart Window for Self-Adaptive Thermoregulation.

Zuowei Zhang1, Yihai Yang2, Gaoyuan Gu1

  • 1Liaoning Key Laboratory for Surface Functionalization of Titanium Dioxide Powder, School of Materials and Environmental Engineering, Bohai University, Jinzhou, Liaoning, China.

Advanced Materials (Deerfield Beach, Fla.)
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PubMed
Summary
This summary is machine-generated.

This study introduces a low-voltage polymer-dispersed liquid crystal (PDLC) smart window with enhanced spectral regulation. The novel design achieves significant reductions in driving voltage and improved temperature control for energy savings.

Keywords:
energy savingflexible PDLCp–n heterostructuresradiative coolingtri‐band regulation

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Energy

Background:

  • Polymer-dispersed liquid crystal (PDLC) smart windows are limited by high driving voltages and poor spectral regulation.
  • Existing technologies struggle to balance visible light transmission with thermal modulation.

Purpose of the Study:

  • To develop a low-voltage PDLC smart window with multi-band spectral modulation capabilities.
  • To enhance the electro-optical performance and thermal regulation of smart windows.

Main Methods:

  • Incorporation of p-n heterojunction nanoparticles into PDLC films.
  • Integration of W-VO2/PMMA for tunable infrared emissivity.
  • Characterization of electro-optical properties and spectral modulation.

Main Results:

  • Achieved a 35.1% reduction in saturation voltage (to 16.3 V) and a contrast ratio of 130.
  • Demonstrated switchable long-wave infrared emissivity (0.75 to 0.41) for passive radiative cooling.
  • Confirmed effective temperature regulation (8°C cooling, 2°C insulation) and energy savings.

Conclusions:

  • The developed V-PDLC smart window offers low-voltage operation and effective multi-band spectral control.
  • This technology enables passive radiative cooling and significant energy savings across diverse climates.
  • Provides a pathway for advanced, adaptive smart window applications.