A flexible routing scheme for patients with topographical disorientation

Torres-Solis, Jorge; Chau, Tom

doi:10.1186/1743-0003-4-44

Cited by 9 publications

(8 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We decided that the most meaningful interface to use for this tool was a compass that changes its bearing at every intersection to provide the user with turn-by-turn instructions. This tool selects and presents the best route to follow dynamically, and autoadjusts the route automatically if the user becomes disoriented or decides not to follow all the instructions as described in [31]. This tool supports egocentric spatial knowledge as it instructs the user to move forwards/backwards/left/right from the user's current position and orientation.…”

Section: Navigation Tool Designmentioning

confidence: 99%

Navigation in smart environments using mediated reality tools

Torres-Solis

Guan

Biddiss

et al. 2009

THC

Self Cite

View full text Add to dashboard Cite

Topographical Disorientation (TD) is the lack or loss of orientation and navigation abilities. People living with TD face functional challenges in everyday situations. Smart mediated reality environments present potential solutions for cognitive conditions like TD. In this article, we introduce a novel mediated reality location aware environment. It was hypothesized that tools which offer different positional information affect the navigation performance of a user. The objective of this study was to investigate preferred assistive tools for indoor navigation for use in a proposed mediated reality wayfinding system. These tools may eventually be used to assist patients with TD.To this purpose, we designed a novel wayfinding metric that can be used in the assessment of navigation tasks similar to a scavenger hunt. This novel metric is based on a relative energy expenditure ratio and is independent of navigation route complexity.We investigated four sets of tools (minimap, locator, coordinate display and routing compass) that can be used in a smart mediated reality environment to provide relevant wayfinding information. These tools were designed using different combinations of spatial knowledge (landmark, route or survey), graphical presentation (compass, text, icon, top/side view) and reference frames (egocentric or allocentric). Each tool was evaluated objectively and subjectively. The locator and minimap tools emerged as preferred interfaces, providing the most relevant wayfinding information while minimizing energy expenditure during navigation tasks.

show abstract

Section: Navigation Tool Designmentioning

confidence: 99%

Navigation in smart environments using mediated reality tools

Torres-Solis

Guan

Biddiss

et al. 2009

THC

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, navigation assistance should further take into account pedestrian profiles and choice as well as ambient conditions. Navigational support to people with disabilities may be provided by smart technologies embedded in the environment and wearable devices (Bohonos et al, 2007;Carmien et al, 2005;Chang et al, 2008;Liao et al, 2004;and Torre-Solis and Chau, 2007). An ambient intelligence (AmI) system would be aware of the user's location and physical abilities as well as the building's ambient conditions and structural layout.…”

Section: Introductionmentioning

confidence: 99%

“…However, only minor adaptations of mobile navigation services (Chang et al, 2008;Völkel and Weber, 2008) have become available to satisfy requirements of pedestrians with various disabilities. For pedestrians with disabilities, safety is one basic requirement while navigating (Torre-Solis and Chau, 2007). Wheelchair users avoid stairs and take elevators.…”

Section: Introductionmentioning

confidence: 99%

“…An ambient intelligence (AmI) system would be aware of the user's location and physical abilities as well as the building's ambient conditions and structural layout. The AmI system would provide context-specific navigational assistance in the form of visual or verbal cues through an augmented reality interface (Torre-Solis and Chau, 2007). In this paper, we detail a full-ledged ambient intelligence navigation solution using wireless sensor networks (WSN) for user localization and ambient condition detection, routing engines for navigation, and PDAs as the user interface, to assist with personal wayfinding for individuals with special needs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Indoor Wayfinding Based on Wireless Sensor Networks for Individuals With Multiple Special Needs

Chang

Wang

2010

Cybernetics and Systems

View full text Add to dashboard Cite

Wayfinding systems are an assistive technology targeting disabled patients who are mobile and need to travel in both indoor and outdoor environments, thus increasing workplace and life independence. Such a personal guidance system can improve the quality of life and minimize risks such as wandering behavior, which has been previously observed in patients with acquired brain injury. The proposed system called AssistMote is a full-ledged navigation solution using wireless sensor networks (WSN) for ambient condition detection, routing engines for navigation, and PDAs as the user interface, to assist with indoor wayfinding for individuals with multiple special needs. Ambient intelligence such as inadequate illumination and wet floors can be critical to wayfinding for the targeted population. The routing algorithm is based on the innovative use of Dijkstra's shortest path with the special requirements of navigation applications taken into account. The study reports the prototype design, experiments, and detailed performance evaluation based on computer simulations and field trials of eight human subjects with multiple disabilities who participated in pedestrian navigation in a five-floor building with 91 sensor nodes. AssistMote achieved 95% success compared with 37.5% in a controlled study that used verbal instructions and paper maps.

show abstract

“…We included the deaf people for completeness of the profiles, since we wanted the disabled people to be self-dependent and get benefit of prototype. For safety reasons, disabled people would prefer longer but safer routes [1].…”

Section: Introductionmentioning

confidence: 99%

MND_WSN for Helping People with Different Disabilities

Aly

2014

International Journal of Distributed Sensor Networks

View full text Add to dashboard Cite

This paper introduces a monitoring and navigation system to help people with disabilities (MND WSN ). The proposed system is based on wireless sensor networks. In the MND WSN system, each disabled person uses a handheld smart phone device. Three types of disabilities are studied in this paper: (1) blind, (2) deaf, and (3) on wheelchair. We experimented with a three-floor university building. Sensor nodes and cameras are scattered in all rooms and hallways. Smart phones are used to communicate with the sensor nodes to take instructions to navigate through the appropriate path. Dijkstra's algorithm is used for navigation. MND WSN also monitors the disabled person while navigating. The proposed system is compared to a baseline reference experiment. Results show improvement of 34% compared to the baseline reference experiment.

show abstract

A flexible routing scheme for patients with topographical disorientation

Cited by 9 publications

References 28 publications

Navigation in smart environments using mediated reality tools

Navigation in smart environments using mediated reality tools

Indoor Wayfinding Based on Wireless Sensor Networks for Individuals With Multiple Special Needs

MND_WSN for Helping People with Different Disabilities

Contact Info

Product

Resources

About

A flexible routing scheme for patients with topographical disorientation

Cited by 9 publications

References 28 publications

Navigation in smart environments using mediated reality tools

Navigation in smart environments using mediated reality tools

Indoor Wayfinding Based on Wireless Sensor Networks for Individuals With Multiple Special Needs

MNDWSN for Helping People with Different Disabilities

Contact Info

Product

Resources

About

MND_WSN for Helping People with Different Disabilities