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Related Concept Videos

Line Loss01:10

Line Loss

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The different configurations of source-load connections include wye (star) and delta connections. The relationship between line and phase voltages and currents varies depending on the configuration. When the source is supplying power, it is transmitted through the wires to the load, and during this transmission, some power is absorbed by the wires, leading to line loss.
Line loss impacts power delivery efficiency in a balanced three-phase circuit. The symmetry in such a circuit simplifies the...
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Reducing Line Loss01:18

Reducing Line Loss

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In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
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Energy Losses in Transformers01:21

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In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality,  the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
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Major Losses in Pipes01:28

Major Losses in Pipes

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When a fluid flows through a pipe, it experiences energy losses due to frictional resistance along the pipe walls, known as major losses. These energy losses result in a pressure drop, which varies based on the flow conditions — whether laminar or turbulent — and the specific physical properties of the fluid and pipe.
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Minor Losses in Pipes01:25

Minor Losses in Pipes

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In pipe systems, minor losses refer to energy losses arising from components such as valves, bends, fittings, expansions, and other features that disrupt the steady flow of fluid. These disturbances cause energy dissipation through turbulence and resistance, which engineers quantify to manage system efficiency effectively.
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Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Fabrication and Testing of Microfluidic Optomechanical Oscillators
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Loss-induced transparency in optomechanics.

H Zhang, F Saif, Y Jiao

    Optics Express
    |November 25, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Researchers explored optomechanically induced transparency (OMIT) and found that increasing optical loss can surprisingly restore transparency. This loss-induced transparency near an exceptional point enables new micro-mechanical devices.

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    Area of Science:

    • Quantum optics
    • Optomechanics
    • Nanophotonics

    Background:

    • Optomechanically induced transparency (OMIT) typically relies on specific loss conditions.
    • Coupled optical resonators and mechanical modes are key components in OMIT systems.
    • Understanding the role of optical loss is crucial for controlling OMIT phenomena.

    Purpose of the Study:

    • To investigate the unconventional role of optical loss in OMIT.
    • To explore the emergence of optical transparency in a strongly absorptive regime.
    • To identify loss-induced revival of transparency and its relation to exceptional points.

    Main Methods:

    • Studying a compound system of coupled optical resonators and a mechanical mode.
    • Utilizing an external nanotip to enhance optical loss.
    • Analyzing the OMIT spectrum in the vicinity of an exceptional point.

    Main Results:

    • Optical transparency emerged in a strongly absorptive regime due to enhanced optical loss.
    • Loss-induced revival of optical transparency was observed.
    • A slow-to-fast light switch phenomenon was identified near an exceptional point.

    Conclusions:

    • Optical loss can be engineered to induce transparency in OMIT systems.
    • Exceptional points play a critical role in loss-induced transparency.
    • This research offers a counterintuitive approach to designing micro-mechanical devices for optical switching and communication.