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For a system of charges, it is easy to calculate the system's potential because potential is a scalar quantity. However, in some instances where calculating the electric field is more straightforward than finding the potential, the electric field is used to calculate the system's potential. For a positive charge, the electric field is radially outward, and the potential is positive at any finite distance from the positive charge. In such an electric field, the motion away from the...
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The electric field and electric potential are related to each other. If the electric field at various points in the region of interest is known, it can be used to calculate the electric potential difference between any two points. Similarly, if the electric potential is known for various points, then it is possible to calculate the electric field.
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In psychology, concepts can be divided into two categories: natural and artificial. Natural concepts are formed through direct or indirect experiences. For example, consider the concept of snow. If you live in a place with regular snowfall, such as Essex Junction, Vermont, you know snow through direct experiences. You’ve seen it fall, touched it, shoveled it, and played in it. You recognize its texture, appearance, and even its smell. In contrast, if you live on an island like Saint...
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Walk with Me Hybrid Virtual/In-Person Walking for Older Adults with Neurodegenerative Disease
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Multi-User Redirected Walking and Resetting Using Artificial Potential Fields.

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    New redirected walking (RDW) algorithms use artificial potential fields to prevent collisions in virtual reality. These methods significantly reduce user resets and increase walking distance, enhancing virtual world exploration.

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    Area of Science:

    • Virtual Reality (VR)
    • Human-Computer Interaction (HCI)
    • Robotics

    Background:

    • Head-mounted displays (HMDs) and position tracking enable virtual world navigation via natural walking.
    • Redirected walking (RDW) allows exploration of unbounded virtual environments within limited physical spaces by subtly redirecting users.
    • Resetting techniques are used to reorient users when collisions are imminent.

    Purpose of the Study:

    • To introduce novel RDW and resetting algorithms utilizing artificial potential fields.
    • To enhance user experience and safety in virtual environments by preventing collisions with physical obstacles and other users.
    • To improve the efficiency and scalability of RDW systems for both single-user and multi-user applications.

    Main Methods:

    • Development of new RDW and resetting algorithms based on artificial potential fields.
    • Implementation of algorithms to "push" users away from obstacles and other users.
    • Conducting human subject experiments and live multi-user studies to evaluate performance.

    Main Results:

    • A 66% reduction in potential single-user resets was observed compared to previous techniques.
    • An 86% increase in the average distance between resets was achieved.
    • Demonstrated viability in a live multi-user study with up to 3 concurrent users.
    • Simulation results indicate efficient scaling up to at least 8 users.

    Conclusions:

    • The proposed artificial potential field-based RDW and resetting algorithms are effective in reducing collisions and improving user experience.
    • The methods demonstrate significant improvements in reset frequency and inter-reset distance.
    • The algorithm is viable for multi-user virtual reality experiences and scales efficiently for larger groups.