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Related Concept Videos

Relative Motion Analysis - Velocity01:24

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A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
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The average velocity during a time interval cannot tell us how fast or in what direction a particle is moving at any given time during the interval. To calculate this, it is important to know the instantaneous velocity, which is the velocity at a specific instant of time or at a specific point along the path. Instantaneous velocity is the quantity that measures how fast an object is moving along its path. In other words, the instantaneous velocity vx of an object is the limit of the average...
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Instantaneous velocity is the quantity that measures how fast an object is moving along its path. In other words, the instantaneous velocity of an object is the limit of the average velocity as the elapsed time approaches zero, or the derivative of displacement with respect to time. Like average velocity, the instantaneous velocity is a vector with the dimensions of length per unit time. Instantaneous velocity can have both positive and negative values. The instantaneous velocity can be...
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Consider a hydraulic hoist supporting a load of 1 kN. Assuming a simplified schematic representation of this frame structure, the force acting on BD and BF members can be determined.
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A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
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Frames are essential components of various mechanical and structural systems used daily. These structures are known for their stability and ability to bear heavy loads. A frame is constructed using two-force and multi-force members, interconnected using pin joints. In contrast, trusses are made entirely of two-force members.
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Related Experiment Video

Updated: Apr 17, 2026

Applications of Spatio-temporal Mapping and Particle Analysis Techniques to Quantify Intracellular Ca2+ Signaling In Situ
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Corrected TIMI frame count and frame count velocity.

M G Stoel, C C de Cock, H J Spruijt

    Netherlands Heart Journal : Monthly Journal of the Netherlands Society of Cardiology and the Netherlands Heart Foundation
    |February 20, 2015
    PubMed
    Summary
    This summary is machine-generated.

    Frame Count Velocity (FCV) offers a more accurate angiographic estimation of coronary blood flow than corrected TIMI Frame Count (CTFC). This method simplifies FCV calculation using vessel length, improving coronary flow velocity assessment.

    Keywords:
    coronary angioplastycoronary blood flow velocitycorrected TIMI frame count

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    Area of Science:

    • Cardiology
    • Interventional Cardiology
    • Medical Imaging

    Background:

    • Limited understanding of differences between corrected thrombolysis in myocardial infarction (TIMI) frame count (CTFC) and frame count velocity (FCV).
    • FCV estimates blood flow velocity using TIMI frame count (TFC) and vessel length in epicardial coronary arteries.

    Purpose of the Study:

    • To compare CTFC and FCV in assessing coronary blood flow velocity.
    • To determine if FCV can be accurately calculated using average coronary artery lengths.

    Main Methods:

    • Compared CTFC with FCV in 119 coronary vessels post-angioplasty (50 LAD, 27 LCX, 42 RCA).
    • FCV was assessed by measuring coronary artery length with an intracoronary guidewire.

    Main Results:

    • Significant differences in mean vessel lengths: LAD (14.5±1.6 cm), LCX (12.8±1.9 cm), RCA (11.3±1.4 cm).
    • FCV calculation is feasible using TFC and average vessel lengths without a guidewire.
    • Significantly higher estimated coronary blood flow velocity in RCA (23.0±7.9 cm/sec) compared to LAD (17.6±7.4 cm/sec) and LCX (16.4±6.3 cm/sec).

    Conclusions:

    • FCV can be calculated for LAD, LCX, and RCA using TFC and study-derived average vessel lengths.
    • This method provides a simpler and more accurate angiographic estimation of coronary blood flow velocity compared to CTFC.