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Design and Evaluation of Adaptive Re...

Azmandian, Mahdi.

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Design and Evaluation of Adaptive Redirected Walking Systems.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Design and Evaluation of Adaptive Redirected Walking Systems./
Author:	Azmandian, Mahdi.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
Description:	163 p.
Notes:	Source: Dissertation Abstracts International, Volume: 79-06(E), Section: B.
Contained By:	Dissertation Abstracts International79-06B(E).
Subject:	Computer science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=11016081

Design and Evaluation of Adaptive Redirected Walking Systems.
Azmandian, Mahdi.

Design and Evaluation of Adaptive Redirected Walking Systems. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 163 p.

Source: Dissertation Abstracts International, Volume: 79-06(E), Section: B.

Thesis (Ph.D.)--University of Southern California, 2018.

Real walking is the most intuitive locomotion metaphor for virtual reality applications. Despite its many benefits, real walking inherently restricts users to a confined physical space. Redirected walking is a perceptual illusion introduced to overcome this limitation by leveraging the characteristics of the human perception system. While redirection has come a long way since its conception, a majority of the research in the field has been focused on the perceptual aspects of redirection. Though crucial, the human component of redirection is just one piece of the puzzle and it does not provide us with an application method. Harnessing the potential of redirected walking requires acknowledging the multiple facets of the problem, and designing a system that addresses its requirements methodically. This work provides the theoretical foundation to achieve this, bridging the gap between understanding redirection and employing it. I begin first by providing a formal definition and hierarchical design for the envisioned redirection system. The hierarchy illustrates how redirection techniques---as the building blocks---are used to form heuristics, in turn forming strategies, and ultimately shaping the structure of a complete redirection system. For a holistic conception of a system's performance, at each level of the hierarchy, a notion of performance is defined that corresponds to the objectives of that level. Measuring this nuanced understanding of performance is made possible by the evaluation methodology and platform. The methodology controls for factors that affect the system's behavior; and by simulating a breadth of conditions allows teasing out the interaction of influential variables. With the theoretical foundation and methodical framework established, I propose adaptive redirection: a novel redirection system forged by a meta-strategy that adapts to the context in which redirection is deployed. To develop the adaptive meta-strategy, redirection strategies are first classified into three categories. Each category is closely examined and further developed for integration with the adaptive paradigm. Then using the evaluation platform, the performance of each category is measured across different contexts in order to develop adaptation rules for transitioning between strategies based on the context. In addition to guiding development, the platform is also used to measure the expected performance and space requirements for redirected walking in the adaptive paradigm. This demonstrates how the proposed theoretical foundation and evaluation framework complement one another, for engineering the illusion of redirected walking.Subjects--Topical Terms:

523869
Computer science.

Design and Evaluation of Adaptive Redirected Walking Systems.
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245 1 0 $a Design and Evaluation of Adaptive Redirected Walking Systems.
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500 $a Source: Dissertation Abstracts International, Volume: 79-06(E), Section: B.
500 $a Adviser: Evan Suma Rosenberg.
502 $a Thesis (Ph.D.)--University of Southern California, 2018.
520 $a Real walking is the most intuitive locomotion metaphor for virtual reality applications. Despite its many benefits, real walking inherently restricts users to a confined physical space. Redirected walking is a perceptual illusion introduced to overcome this limitation by leveraging the characteristics of the human perception system. While redirection has come a long way since its conception, a majority of the research in the field has been focused on the perceptual aspects of redirection. Though crucial, the human component of redirection is just one piece of the puzzle and it does not provide us with an application method. Harnessing the potential of redirected walking requires acknowledging the multiple facets of the problem, and designing a system that addresses its requirements methodically. This work provides the theoretical foundation to achieve this, bridging the gap between understanding redirection and employing it. I begin first by providing a formal definition and hierarchical design for the envisioned redirection system. The hierarchy illustrates how redirection techniques---as the building blocks---are used to form heuristics, in turn forming strategies, and ultimately shaping the structure of a complete redirection system. For a holistic conception of a system's performance, at each level of the hierarchy, a notion of performance is defined that corresponds to the objectives of that level. Measuring this nuanced understanding of performance is made possible by the evaluation methodology and platform. The methodology controls for factors that affect the system's behavior; and by simulating a breadth of conditions allows teasing out the interaction of influential variables. With the theoretical foundation and methodical framework established, I propose adaptive redirection: a novel redirection system forged by a meta-strategy that adapts to the context in which redirection is deployed. To develop the adaptive meta-strategy, redirection strategies are first classified into three categories. Each category is closely examined and further developed for integration with the adaptive paradigm. Then using the evaluation platform, the performance of each category is measured across different contexts in order to develop adaptation rules for transitioning between strategies based on the context. In addition to guiding development, the platform is also used to measure the expected performance and space requirements for redirected walking in the adaptive paradigm. This demonstrates how the proposed theoretical foundation and evaluation framework complement one another, for engineering the illusion of redirected walking.
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