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Related Concept Videos

Diffusion01:12

Diffusion

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Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
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Diffusion01:21

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Diffusion is a type of passive transport. In passive transport, a substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space. For example, take the diffusion of substances through the air. When someone opens a perfume bottle in a room filled with people, the perfume is at its highest concentration in the bottle and is at its lowest at the edges of the room. The perfume vapor will diffuse, or spread away, from the...
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Heating and Cooling Curves02:44

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When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
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Acid-Base Titration Curves02:23

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A titration curve is a plot of some solution property versus the amount of added titrant. For acid-base titrations, solution pH is a useful property to monitor because it varies predictably with the solution composition and, therefore, may be used to monitor the titration’s progress and detect its endpoint. Acid-base titration can be performed with a strong acid and a strong base, a strong acid and a weak base, or a strong base and a weak acid.
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Facilitated Diffusion01:16

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The plasma membrane, a critical structure in cellular biology, houses an array of transporters, or carrier proteins, interspersed within its lipid bilayer. These proteins play a crucial role in solute transport through facilitated diffusion, a form of passive diffusion that uses transporters to move the molecules across the membrane.
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Curve Equations

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Curves are essential geometric elements characterized by tangent distance, chord length, middle ordinate, and total arc length. These measurements are crucial in understanding a curve's geometric and spatial properties and are defined by the relationship between its radius and its central angle.The tangent distance (T) refers to the straight-line measurement from the intersection point of two tangents to either the start or end of the curve. This distance is influenced by the curve's radius (R)...
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An Inverse Analysis Approach to the Characterization of Chemical Transport in Paints
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Vectorized Painting with Temporal Diffusion Curves.

Yingjia Li, Xiao Zhai, Fei Hou

    IEEE Transactions on Visualization and Computer Graphics
    |July 23, 2019
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    Summary
    This summary is machine-generated.

    This study introduces Temporal Diffusion Curves (TDCs), a new vector graphics approach, enabling intuitive digital art creation with real-time editing. Artists can produce diverse artworks efficiently using this innovative painting system.

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    Area of Science:

    • Computer Graphics
    • Digital Art
    • Computational Geometry

    Background:

    • Traditional vector graphics lack intuitive stroke manipulation for artistic expression.
    • Existing methods struggle with real-time editing and resolution independence.
    • Diffusion Curves offer a powerful primitive but are not stroke-based.

    Purpose of the Study:

    • To introduce Temporal Diffusion Curves (TDCs) as a novel vector graphics primitive.
    • To develop a real-time vector painting system with intuitive stroke editing.
    • To enable artists to create diverse digital artworks efficiently.

    Main Methods:

    • Proposed Temporal Diffusion Curve (TDC) as a new vector graphics primitive.
    • Developed a novel random-access solver for modeling stroke evolution.
    • Implemented a procedural stroke processing function for versatile stroke effects.

    Main Results:

    • TDC strokes achieve various shapes and effects suitable for multiple art styles.
    • The painting system offers real-time performance irrespective of rendering resolution.
    • Editing of strokes is straightforward, both during and after creation.

    Conclusions:

    • The TDC-based vector painting system provides real-time performance and intuitive editing.
    • Strokes as basic primitives are more aligned with artists' intuition and habits.
    • Professional artists can create multiple genres of artworks using the developed system.