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Related Concept Videos

Elastic Collisions: Case Study01:15

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Elastic collision of a system demands conservation of both momentum and kinetic energy. To solve problems involving one-dimensional elastic collisions between two objects, the equations for conservation of momentum and conservation of internal kinetic energy can be used. For the two objects, the sum of momentum before the collision equals the total momentum after the collision. An elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals...
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When two or more objects collide with each other, they can stick together to form one single composite object (after collision). The total mass of the object after the collision is the sum of the masses of the original objects, and it moves with a velocity dictated by the conservation of momentum. Although the system's total momentum remains constant, the kinetic energy decreases, and thus such a collision is an inelastic collision. Most of the collisions between objects in daily life are...
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When two objects come in direct contact with each other, it is called a collision. During a collision, two or more objects exert forces on each other in a relatively short amount of time. A collision can be categorized as either an elastic or inelastic collision. If two or more objects approach each other, collide and then bounce off, moving away from each other with the same relative speed at which they approached each other, the total kinetic energy of the system is said to be conserved. This...
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An elastic collision is one that conserves both internal kinetic energy and momentum. Internal kinetic energy is the sum of the kinetic energies of the objects in a system. Truly elastic collisions can only be achieved with subatomic particles, such as electrons striking nuclei. Macroscopic collisions can be very nearly, but not quite, elastic, as some kinetic energy is always converted into other forms of energy such as heat transfer due to friction and sound. An example of a nearly...
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In multiple dimensions, the conservation of momentum applies in each direction independently. Hence, to solve collisions in multiple dimensions, we should write down the momentum conservation in each direction separately. To help understand collisions in multiple dimensions, consider an example.
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Haptic/Graphic Rehabilitation: Integrating a Robot into a Virtual Environment Library and Applying it to Stroke Therapy
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Ins-HOI: Instance Aware Human-Object Interactions Recovery.

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    This summary is machine-generated.

    This study introduces Ins-HOI, a new framework for 3D human-object interaction modeling. It enables detailed, instance-aware reconstructions, capturing realistic contact surfaces for improved accuracy.

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    Area of Science:

    • Computer Vision
    • 3D Reconstruction
    • Human-Computer Interaction

    Background:

    • Current multi-view systems merge subjects into a single mesh, failing to represent individual instances during interactions.
    • Template-based methods struggle with geometric details and invisible contact surfaces due to limited descriptive capabilities.

    Purpose of the Study:

    • To develop an end-to-end framework for instance-aware 3D human-object interaction recovery.
    • To address limitations in modeling detailed interactions and invisible contact surfaces.

    Main Methods:

    • Proposed an Instance-aware Human-Object Interactions (Ins-HOI) framework using an instance-level occupancy field representation.
    • Introduced a complementary training strategy using synthetic data for instance-level shape priors and real data for overall geometry and contact restriction.

    Main Results:

    • Ins-HOI supports instance-level reconstruction, disentangling occupancy fields for different instances.
    • Achieved reasonable and realistic invisible contact surfaces, even in close interactions.

    Conclusions:

    • The Ins-HOI framework advances 3D human-object interaction modeling by enabling instance-level reconstruction.
    • The proposed training strategy effectively leverages both synthetic and real data for improved accuracy and detail.