Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Mechanism of heat transfer01:19

Mechanism of heat transfer

1.2K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.2K
Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

325
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
325
Mechanisms of Heat Transfer I01:14

Mechanisms of Heat Transfer I

4.2K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
4.2K
Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

3.3K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
3.3K
Thermal expansion and Thermal stress: Problem Solving01:27

Thermal expansion and Thermal stress: Problem Solving

1.2K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
1.2K
Le Chatelier's Principle: Changing Volume (Pressure)02:32

Le Chatelier's Principle: Changing Volume (Pressure)

35.1K
For gas-phase equilibria, changes in the concentrations of reactants and products can occur with altered volume and pressure. The partial pressure, P, of an ideal gas is proportional to its molar concentration, M.
35.1K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

2D ferroelectric narrow-bandgap semiconductor Wurtzite' type α-In<sub>2</sub>Se<sub>3</sub> and its silicon-compatible growth.

Nature communications·2025
Same author

Copper-Doped Barium Titanate Coating: A Piezoelectric Match to Natural Bone for Enhanced Osteogenesis.

ACS applied materials & interfaces·2025
Same author

Epitaxial Strain Enhanced Ferroelectric Polarization toward a Giant Tunneling Electroresistance.

ACS nano·2024
Same author

Gradient tungsten-doped Bi<sub>3</sub>TiNbO<sub>9</sub> ferroelectric photocatalysts with additional built-in electric field for efficient overall water splitting.

Nature communications·2023
Same author

Schottky Barrier Control of Self-Polarization for a Colossal Ferroelectric Resistive Switching.

ACS nano·2023
Same author

Photocatalytic Overall Water Splitting over PbTiO<sub>3</sub> Modulated by Oxygen Vacancy and Ferroelectric Polarization.

Journal of the American Chemical Society·2022
Same journal

Surface-ligand-triggered synthetic control of defects in nanocrystals toward high-efficiency blue electroluminescence.

Innovation (Cambridge (Mass.))·2026
Same journal

Satellite radar and AIS reveal a 97% decline in shipping traffic through the Strait of Hormuz.

Innovation (Cambridge (Mass.))·2026
Same journal

Hallmarks of health: A Chinese medicine perspective.

Innovation (Cambridge (Mass.))·2026
Same journal

HBV-driven expansion of CXCR6<sup>+</sup>-exhausted T cells and CXCL16<sup>+</sup> macrophage interaction: Implications for immunotherapy in HCC.

Innovation (Cambridge (Mass.))·2026
Same journal

Making the invisible audible: Soft biodegradable implants redefine deep-tissue sensing.

Innovation (Cambridge (Mass.))·2026
Same journal

Dynamic controls on subsurface water chemistry and habitability on icy moons.

Innovation (Cambridge (Mass.))·2026
查看所有相关文章

相关实验视频

Updated: Jul 2, 2025

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer
10:11

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer

Published on: April 19, 2021

3.7K

用微小的压力来服热量.

Kun Zhang1,2, Zhe Zhang1,2, Hailong Pan3

  • 1Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.

Innovation (Cambridge (Mass.))
|February 21, 2024
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的,负担得起的热能回收利用2-氨基-2-甲基-1,3-二醇 (AMP) 的方法. 这种材料的材料.

更多相关视频

High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus
12:30

High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus

Published on: April 3, 2018

18.8K
Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System
10:52

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

Published on: August 7, 2018

8.6K

相关实验视频

Last Updated: Jul 2, 2025

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer
10:11

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer

Published on: April 19, 2021

3.7K
High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus
12:30

High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus

Published on: April 3, 2018

18.8K
Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System
10:52

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

Published on: August 7, 2018

8.6K

科学领域:

  • 材料科学 材料科学 材料科学
  • 热力学是一种热力学.
  • 收集能源 收集能源

背景情况:

  • 由于热力学限制和自发散热,控制热流具有挑战性.
  • 操纵热反应的现有方法,如光学照明或压力诱导相变,往往是昂贵的,难以扩展.
  • 需要为热能回收和利用提供具有成本效益和可管理的解决方案.

研究的目的:

  • 展示一种新的,负担得起的,可扩展的热能回收利用方法.
  • 为了研究2-amino-2-methyl-1,3-propanediol (AMP) 的玻璃状晶体状态对热控制的潜力.
  • 开发一种高效率可编程加热的概念验证装置.

主要方法:

  • 谱分析以表征2-氨基-2-甲基-1,3-二醇 (AMP) 的玻璃状晶体状态.
  • 在超冷的AMP中施加压力 (几兆帕卡尔) 诱导结晶.
  • 开发和测试一种用于热操纵的概念验证装置.

主要成果:

  • 超冷状态的AMP对压力非常敏感,诱导结晶和显著的温度增加48K在20秒内.
  • 展示了一种可编程加热的概念验证装置,其工作热转换效率约为383%.
  • 基于AMP的系统提供了可负担得起且易于管理的热能控制方法.

结论:

  • AMP的玻璃晶体状态为热能回收提供了一个独特而高效的热能回收机制.
  • 压力诱导的AMP结晶为现有的热控制方法提供了一个可扩展和具有成本效益的替代方案.
  • 这种微妙而高效的热调节能力为合理利用废热带来了巨大的潜力.