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Related Concept Videos

Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the drone...
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it instrumental in...
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

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.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
Curvilinear Motion: Rectangular Components01:23

Curvilinear Motion: Rectangular Components

Curvilinear motion characterizes the movement of a particle or object along a curved path, notably evident when envisioning a car navigating a winding road. If the car starts at point A, its position vector is established within a fixed frame of reference, where the ratio of the position vector to its magnitude signifies the unit vector pointing in the position vector's direction.
As the car advances, its position evolves over time. Quantifying the car's velocity involves computing the time...

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Related Experiment Video

Updated: Jun 12, 2026

Quantification of Orofacial Phenotypes in Xenopus
09:26

Quantification of Orofacial Phenotypes in Xenopus

Published on: November 6, 2014

Analysis of lip motion using principal component analyses.

Katsuaki Mishima1, Tomohiro Yamada, Tatsushi Matsumura

  • 1Department of Oral and Maxillofacial Reconstructive Surgery, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Okayama 700-8558, Japan. kmishima@md.okayama-u.ac.jp

Journal of Cranio-Maxillo-Facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery
|June 16, 2010
PubMed
Summary

This study quantitatively analyzed Japanese vowel lip movements. Principal component analysis identified key movements controlling mouth opening and corner retraction, enabling vowel distinction.

Related Experiment Videos

Last Updated: Jun 12, 2026

Quantification of Orofacial Phenotypes in Xenopus
09:26

Quantification of Orofacial Phenotypes in Xenopus

Published on: November 6, 2014

Area of Science:

  • Acoustic phonetics
  • Biomechanics of speech
  • Computational linguistics

Background:

  • Understanding precise lip movement is crucial for speech production research.
  • Quantitative analysis of articulatory dynamics offers insights into phoneme production.

Purpose of the Study:

  • To quantitatively determine lip movement characteristics during Japanese vowel phonation.
  • To identify parameters controlling specific lip motions.
  • To assess the distinctiveness of lip movements across different Japanese vowels.

Main Methods:

  • Lip motion analysis of 14 individuals producing Japanese vowels (/a/, /i/, /u/, /e/, /o/).
  • Utilized a motion analyzing system to generate range images and fit virtual grids.
  • Applied principal component analysis (PCA) to 3D coordinates of grid intersections.

Main Results:

  • The fourth and fifth principal component scores correlated with mouth opening and lip corner retraction, respectively.
  • Discriminant analysis demonstrated the ability to differentiate /u/ phonation based on lip motion patterns.
  • Identified key kinematic parameters governing Japanese vowel articulation.

Conclusions:

  • Specific principal component scores serve as quantitative parameters for lip movement analysis.
  • Lip motion patterns during /u/ phonation are distinguishable from other Japanese vowels.
  • This quantitative approach enhances understanding of speech articulation and phoneme differentiation.