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One-Degree-of-Freedom System01:24

One-Degree-of-Freedom System

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In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
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Three-Dimensional Force System01:30

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In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
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Relative Motion Analysis using Rotating Axes-Problem Solving01:29

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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.
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Three-Dimensional Force System:Problem Solving01:30

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A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
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Relative Motion Analysis using Rotating Axes01:25

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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.
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Rotational Motion about a Fixed Axis01:26

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A rigid body's rotation around a fixed axis makes every point within it trace a circular path around a specific line or point. The term given to this type of spinning is defined by the angular position, symbolized by the angle θ. This angle is gauged from a static reference line to the revolving object. From this angular position, any variation is referred to as angular displacement, denoted by dθ. The extent of this displacement can be calculated in degrees, radians, or...
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Controlled Rotation of Human Observers in a Virtual Reality Environment
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Visual Servoed Three-Dimensional Cell Rotation System.

Zenan Wang, Win Tun Latt, Steven Yih Min Tan

    IEEE Transactions on Bio-Medical Engineering
    |May 21, 2015
    PubMed
    Summary
    This summary is machine-generated.

    Automated 3-D embryo orientation is achieved using a novel noninvasive system. This precise, controllable method enhances micromanipulation tasks like cell injection and biopsy, improving success rates and reducing operator dependency.

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    Area of Science:

    • Developmental Biology
    • Biotechnology
    • Microfluidics

    Background:

    • Accurate three-dimensional (3-D) positioning and orientation of embryos/oocytes are crucial for microscopic micromanipulation procedures.
    • Conventional manual orientation methods are imprecise, operator-dependent, and have low success rates, highlighting the need for automated solutions.

    Purpose of the Study:

    • To develop and validate a noninvasive automated system for precise 3-D orientation of zebrafish embryos.
    • To improve the efficiency and accuracy of cell manipulation techniques in assisted reproduction and genetic diagnostics.

    Main Methods:

    • A custom-designed rotational stage implementing a three-point-contact model for precise rotational control.
    • A vision recognition algorithm integrated for visual servoing to guide the automated orientation process.
    • Noninvasive manipulation ensuring cell integrity during the rotation process.

    Main Results:

    • High success rates achieved: 92.5% for x-axis rotation and 97.5% for z-axis rotation.
    • Efficient 3-D cell orientation completed at an average speed of 31 seconds per cell.
    • High in-plane rotation accuracy demonstrated at 0.3 degrees, showcasing system precision.

    Conclusions:

    • The developed system offers a precise, controllable, and deterministic approach to automated 3-D cell orientation.
    • This technology serves as a foundation for advanced automated cell manipulation in procedures like intracytoplasmic sperm injection and embryo biopsy.
    • The system significantly overcomes the limitations of manual methods, paving the way for more reliable preimplantation genetic diagnosis.