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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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Instantaneous Power01:22

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Instantaneous power is important in electrical circuits, mainly when dealing with sinusoidal input. Instantaneous power, denoted as p(t), results from the multiplication of the instantaneous voltage (v(t)) across an element and the instantaneous current (i(t)) flowing through it. This relationship adheres to the passive sign convention and represents a fundamental principle in electrical engineering.
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Complex Power01:14

Complex Power

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Power engineers have introduced the concept of complex power to determine the cumulative effect of parallel loads. This idea plays a crucial role in power analysis because it encompasses all the details related to the power consumed by a specific load.
Complex power is defined as the multiplication of the voltage and the complex conjugate of the current. The magnitude of this power, known as apparent power, is measured in volt-amperes (VA). Notably, the angle of the complex power equates to the...
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Electrical Power01:07

Electrical Power

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Electric power is the product of current and voltage, represented in units of joules per second, or watts. For example, cars often have one or more auxiliary power outlets with which you can charge a cell phone or other electronic devices. These outlets may be rated at 20 amps and 12 volts, so that the circuit can deliver a maximum power of 240 watts. Consider a 25 Watt bulb and a 60 Watt bulb. The conversion of electrical energy produces heat and light, while the kinetic energy lost by the...
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Sums of Power01:22

Sums of Power

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In definite integration, Riemann sums approximate the area under a curve by dividing it into subintervals and summing the areas of rectangles. When these approximations follow predictable numerical patterns, such as arithmetic or polynomial sequences, sum formulas offer a more efficient and accurate way to compute the result. In particular, the sum of consecutive integers, squares, and cubes plays an essential role in simplifying these calculations, especially when dealing with uniform...
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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.
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Related Experiment Video

Updated: Jan 29, 2026

Fabrication of Three-dimensional Paper-based Microfluidic Devices for Immunoassays
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Paper-Based Microfluidic Devices: A Powerful Strategy for Rapid Detection.

Xin Liu1, Weimin Xu1, Haowen Jiang1

  • 1School of Printing and Packaging Engineering, Beijing Institute of Graphic Communication, Beijing 102600, China.

Micromachines
|January 28, 2026
PubMed
Summary
This summary is machine-generated.

Microfluidic paper-based analytical devices (μPADs) offer a portable, low-cost solution for rapid on-site detection of diseases, environmental pollutants, and food contaminants. This review highlights their advances and applications.

Keywords:
environmental monitoringfood safetypaper-based microfluidicspoint-of-care diagnosticsrapid detection

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Last Updated: Jan 29, 2026

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Area of Science:

  • Analytical Chemistry
  • Biomedical Engineering
  • Environmental Science

Background:

  • Global health is threatened by diseases, pollution, and food safety issues.
  • Current detection methods are accurate but require complex equipment and expertise, hindering on-site application.
  • There is a critical need for sensitive, rapid, and portable analytical tools.

Purpose of the Study:

  • To review recent advancements in microfluidic paper-based analytical devices (μPADs).
  • To discuss fabrication techniques, material selection, and detection mechanisms of μPADs.
  • To assess the applications of μPADs in medical diagnostics, environmental analysis, and food safety.

Main Methods:

  • Overview of paper-based material development and fabrication techniques.
  • Discussion on material selection and detection principles for μPADs.
  • Assessment of μPAD applications across various fields.

Main Results:

  • μPADs offer environmental-friendliness, flexibility, and low cost.
  • Significant progress has been made in μPAD applications for medical, environmental, and food safety testing.
  • The review details material choices and detection strategies relevant to μPAD performance.

Conclusions:

  • μPADs are a promising technology for accessible, on-site diagnostics and monitoring.
  • Further research is needed to address current challenges and explore future prospects.
  • μPADs represent a significant advancement in portable analytical devices.