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Related Concept Videos

Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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What is a Mode?01:07

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The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
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Ventilatory Modes01:14

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Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
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Modes of Standing Waves - I01:03

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A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...
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Modes of Standing Waves: II01:04

Modes of Standing Waves: II

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The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....
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Electrospun polymer bottle microresonators for stretchable single-mode lasing devices.

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    This summary is machine-generated.

    Researchers developed a low-cost electrospinning technique to create tunable polymer bottle microresonators for lasing and sensing applications. This method enables flexible, stretchable devices with high-quality optical performance.

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    Area of Science:

    • Materials Science
    • Optics and Photonics
    • Nanotechnology

    Background:

    • Microresonators are crucial for optical devices.
    • Developing cost-effective and scalable fabrication methods is essential.
    • Flexible and tunable photonic devices are in high demand for advanced applications.

    Purpose of the Study:

    • To report a simple and low-cost electrospinning method for fabricating polymer bottle microresonators.
    • To demonstrate the lasing capabilities and tunability of these microresonators.
    • To explore their potential in stretchable lasing and sensing devices.

    Main Methods:

    • Fabrication of polymer bottle microresonators using electrospinning.
    • Doping microresonators with a lasing gain material.
    • Integration onto a flexible grooved polymer substrate.
    • Optical pumping using an interference light source.
    • Mechanical stretching of the substrate to tune lasing peaks.

    Main Results:

    • Successfully fabricated polymer bottle microresonators with smooth surfaces and high optical quality.
    • Achieved single whispering gallery mode lasing with a side-mode suppression factor > 20 dB.
    • Demonstrated tunability of lasing peaks through mechanical stretching of the substrate.

    Conclusions:

    • The electrospinning method is simple, time-saving, and low-cost.
    • The fabricated microresonators exhibit high-quality lasing and tunability.
    • This technique holds promise for developing stretchable lasing and sensing devices.