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Related Concept Videos

Power01:08

Power

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The concept of work involves force and displacement; meanwhile, the work-energy theorem relates the net work done on a body to the difference in its kinetic energy, calculated between two points on its trajectory. While none of these quantities or relations involves time explicitly, we know that the time available to accomplish work is often just as important as the amount of work itself. For example, sprinters in a race may have achieved the same velocity at the finish, therefore,...
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Tumor Progression02:07

Tumor Progression

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Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
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Power System Distribution01:25

Power System Distribution

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Power system distribution involves delivering electrical energy from power plants to consumers through a network of transmission and distribution systems. The process begins at power plants, where energy from coal, gas, nuclear, water, and wind is converted into electrical energy. These plants use three-phase generators, typically rated between 50 to 1300 MVA, with terminal voltages ranging from a few kV to 20 kV, depending on the size and age of the units.
The transmission system is designed...
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Nuclear Power02:36

Nuclear Power

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Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
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Power and Energy01:12

Power and Energy

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The power and energy delivered to an element are subjects of great significance in the field of electrical engineering. It is a well-known fact that a 100-watt light bulb emits more light than a 60-watt one. Therefore, power and energy calculations play a crucial role in the analysis of electrical circuits.
Power, defined as the time rate of expending or absorbing energy, is quantified in units called watts (W). The relation between power and energy is mathematically given as
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Average Power01:13

Average Power

1.0K
In practical electrical applications, the concept of time-varying instantaneous power is not frequently utilized. Instead, focus shifts to the more practical quantity known as average power. Average power is determined by integrating the instantaneous power over a specified time period and subsequently dividing it by that duration.
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Related Experiment Video

Updated: Jan 22, 2026

The Three-Dimensional Human Skin Reconstruct Model: a Tool to Study Normal Skin and Melanoma Progression
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Recent Progress in Self-Powered Skin Sensors.

Jihong Rao1, Zetong Chen2, Danna Zhao3

  • 1School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China. jihongrao@163.com.

Sensors (Basel, Switzerland)
|June 29, 2019
PubMed
Summary
This summary is machine-generated.

Self-powered skin sensors, which harvest energy from stimuli, offer sustainable, battery-free solutions for medical care and robotics. This review details their mechanisms, structures, and sensing principles.

Keywords:
piezoelectric nanogeneratorself-poweredskin sensortriboelectric nanogenerator

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Biomedical Engineering

Background:

  • Self-powered skin sensors are gaining traction for applications in healthcare, prosthetics, and sports.
  • These sensors eliminate the need for external power sources like batteries, enabling sustainable operation.

Purpose of the Study:

  • To comprehensively review recent advancements in self-powered skin sensors.
  • To analyze working mechanisms, device structures, and sensing principles based on monitoring signals.

Main Methods:

  • Systematic review of recent research achievements in self-powered skin sensors.
  • Categorization and discussion based on different monitoring signals (e.g., motion, touch, chemical).

Main Results:

  • Detailed summary of various self-powered skin sensor designs and their operational principles.
  • Identification of key challenges and future opportunities in the field.

Conclusions:

  • Self-powered skin sensors represent a promising technology for diverse applications due to their sustainable and autonomous nature.
  • Further research is needed to address existing challenges and unlock the full potential of these devices.