The Experts below are selected from a list of 1173 Experts worldwide ranked by ideXlab platform
Mark Feldmeier - One of the best experts on this subject based on the ideXlab platform.
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UbiComp - A Compact, Wireless, Self-Powered Pushbutton Controller
Ubicomp 2001: Ubiquitous Computing, 2001Co-Authors: Joseph A Paradiso, Mark FeldmeierAbstract:We describe a compact piezoelectric Pushbutton and associated minimal circuitry that is able to wirelessly transmit a digital ID code to the immediate region (e.g., 50-100 foot radius) upon a single button push, without the need of batteries or other energy sources. Such devices have the potential of enabling controls and interfaces to be introduced into interactive environments without requiring any wiring, optical/acoustic lines of sight, or batteries.
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a compact wireless self powered Pushbutton controller
Ubiquitous Computing, 2001Co-Authors: Joseph A Paradiso, Mark FeldmeierAbstract:We describe a compact piezoelectric Pushbutton and associated minimal circuitry that is able to wirelessly transmit a digital ID code to the immediate region (e.g., 50-100 foot radius) upon a single button push, without the need of batteries or other energy sources. Such devices have the potential of enabling controls and interfaces to be introduced into interactive environments without requiring any wiring, optical/acoustic lines of sight, or batteries.
Adam Postula - One of the best experts on this subject based on the ideXlab platform.
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Navigation for the blind using a wireless sensor haptic glove
2015 4th Mediterranean Conference on Embedded Computing (MECO), 2015Co-Authors: Adam Keyes, Matthew D'souza, Adam PostulaAbstract:This paper presents a prototype indoor navigation system for the blind based on wireless sensor network coupled with a haptic feedback glove. The system uses Received Signal Strength Indicator (RSSI) to continuously triangulate the position of the Vision Impaired (VI) person. A number of most relevant destinations can be assigned to Pushbuttons on a haptic glove. Upon receiving input from the user via a Pushbutton indicating the desired destination a path is routed. To aid in traversing to the destination the individual wears the haptic feedback glove embedded with vibrational motors and an ultrasonic sensor to gauge distance of nearby objects.
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MECO - Navigation for the blind using a wireless sensor haptic glove
2015 4th Mediterranean Conference on Embedded Computing (MECO), 2015Co-Authors: Adam Keyes, Matthew D'souza, Adam PostulaAbstract:This paper presents a prototype indoor navigation system for the blind based on wireless sensor network coupled with a haptic feedback glove. The system uses Received Signal Strength Indicator (RSSI) to continuously triangulate the position of the Vision Impaired (VI) person. A number of most relevant destinations can be assigned to Pushbuttons on a haptic glove. Upon receiving input from the user via a Pushbutton indicating the desired destination a path is routed. To aid in traversing to the destination the individual wears the haptic feedback glove embedded with vibrational motors and an ultrasonic sensor to gauge distance of nearby objects.
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Navigation for the Blind using a Wireless Sensor
2015Co-Authors: Adam Keyes, Matthew D'souza, Adam PostulaAbstract:This paper presents a prototype indoor navigation system for the blind based on wireless sensor network coupled with a haptic feedback glove. The system uses Received Signal Strength Indicator (RSSI) to continuously triangulate the position of the Vision Impaired (VI) person. A number of most relevant destinations can be assigned to Pushbuttons on a haptic glove. Upon receiving input from the user via a Pushbutton indicating the desired destination a path is routed. To aid in traversing to the destination the individual wears the haptic feedback glove embedded with vibrational motors and an ultrasonic sensor to gauge distance of nearby objects.
Joseph A Paradiso - One of the best experts on this subject based on the ideXlab platform.
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UbiComp - A Compact, Wireless, Self-Powered Pushbutton Controller
Ubicomp 2001: Ubiquitous Computing, 2001Co-Authors: Joseph A Paradiso, Mark FeldmeierAbstract:We describe a compact piezoelectric Pushbutton and associated minimal circuitry that is able to wirelessly transmit a digital ID code to the immediate region (e.g., 50-100 foot radius) upon a single button push, without the need of batteries or other energy sources. Such devices have the potential of enabling controls and interfaces to be introduced into interactive environments without requiring any wiring, optical/acoustic lines of sight, or batteries.
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a compact wireless self powered Pushbutton controller
Ubiquitous Computing, 2001Co-Authors: Joseph A Paradiso, Mark FeldmeierAbstract:We describe a compact piezoelectric Pushbutton and associated minimal circuitry that is able to wirelessly transmit a digital ID code to the immediate region (e.g., 50-100 foot radius) upon a single button push, without the need of batteries or other energy sources. Such devices have the potential of enabling controls and interfaces to be introduced into interactive environments without requiring any wiring, optical/acoustic lines of sight, or batteries.
Billie Louise Bentzen - One of the best experts on this subject based on the ideXlab platform.
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Taking the Next Step
IMSA journal, 2013Co-Authors: David R P Gibson, Paul Burton, Neil Boudreau, Michael J Bobinsky, Jim Hoben, Bo Ling, Billie Louise BentzenAbstract:The Federal Highway Administration (FHWA) recently conducted a large-scale field test of a stereo vision system for detecting pedestrians at signal-controlled intersections. Stereo vision, also called stereopsis and binocular vision, uses two views of a scene viewed with two cameras to compare slightly different pixel images to extract information that can be used to calculate depth. Proving that stereo vision will reliably detect pedestrians in real-world environments is critical to convincing engineers that using these systems is safe for improving intersection crossings. The field test was conducted to confirm that stereo vision systems can effectively actuate pedestrian calls and trigger the audible locator tones on accessible pedestrian signals. The researchers conducted the tests in Tucson, Arizona; Somerville, Massachusetts; Portland, Maine; and Manchester, New Hampshire -- sites selected for their temperature extremes and wide variations in weather conditions. The field test shows that when pedestrians are detected near the Pushbuttons, the stereo pedestrian detection system actuates either regular or accessible pedestrian signal Pushbuttons to make requests for the pedestrian crossing phases. The overall positive detection rate for the automated Pushbutton actuation zone at all four cities is close to 98%, and the average number of false calls per day is less than 3. To date, all of the systems continue to be operational, 24/7, in complex outdoor environments. Now that a stereo vision system is available that can identify pedestrians and turn on locator tones, much additional research is needed to fine-tune the system to optimize it for the needs of visually impaired individuals. Ultimately, the stereo camera system’s ability to reliably detect pedestrians and automate actuation of Pushbuttons based on the presence of pedestrians promises to help reduce the likelihood of conflicts between vehicles and pedestrians. The end result is safer crossings and, ideally, fewer fatalities.
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Evaluation of emergency egress information for persons who are blind
International Journal of Emergency Management, 2010Co-Authors: Bill Crandall, Billie Louise Bentzen, Linda MyersAbstract:Emergency procedures vary according to the type and extent of emergency, size of building, occupancy and type of building construction. There is no agreement on how emergency egress information should be provided for persons who are blind. This research investigated the efficacy of a Braille (Brl) sign, a Raised Print (RP) sign, a Tactile Map (TM), an audible route description activated by a Pushbutton and exit signs equipped with Remote Infrared Audible Signage (RIAS) for enabling persons who are blind to travel routes to exits. The efficacy of each format in terms of time to acquire route information and time to travel a route was measured. Blind travellers' perceived needs and desires for obtaining emergency egress information were also investigated. Both RIAS and Pushbutton-activated verbal route directions enabled participants to access and use emergency egress information efficiently. Auditory information was preferred above tactile information. Of the tactile formats, Brl resulted in more efficient access to egress information than RP and TMs and was preferred. This research is a first step in addressing the complex issues involved in providing emergency egress information to persons who are blind.
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Speech Messages for Accessible Pedestrian Signals
Ite Journal-institute of Transportation Engineers, 2004Co-Authors: Billie Louise Bentzen, Janet M Barlow, Lukas FranckAbstract:A panel of experts developed a survey on speech messages for accessible pedestrian signals (APSs). First, the panel developed sample walk and Pushbutton information messages that were applicable to different intersection geometries and signalization patterns and were variable in message content, length and structure. Second, the messages that were judged by most members of the panel to be unambiguous and to clearly convey the minimum necessary information were developed into a survey instrument for obtaining data on preferences for message content and structure. The survey also contained items to evaluate message comprehension. The survey was mailed to 160 stakeholders who were not visually impaired. In addition, it was administrated in Braille, in large print, or orally to 170 pedestrians with visual impairments. Survey results served as bases in developing a recommended practice for the structure and content of walk messages and Pushbutton information messages for push button-integrated APSs. Language: en
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BLIND PEDESTRIANS AT UNFAMILIAR SIGNALIZED INTERSECTIONS: RESEARCH ON SAFETY
2003Co-Authors: Billie Louise Bentzen, Janet M BarlowAbstract:Pedestrians who are blind or visually impaired often travel in unfamiliar areas and cross at signalized intersections. This paper presents the results of part of the first phase of a study of crossings by pedestrians who are blind at unfamiliar complex signalized intersections. Data are being collected, in three cities, with 16 participants who are unable to see crosswalk lines, Pushbutton poles, or pedestrian signals, on the following variables: participants' location in the crosswalk; location in relation to the crosswalk at the end of the crossing; delay after the onset of the walk interval (or parallel straight-ahead traffic); cue used to initiate starting; traffic movements at the end of the walk phase; finding and use of Pushbuttons; and requests for assistance or need for intervention for safety at any part in the sequence of crossing tasks. All participants were accustomed to crossing independently at signalized intersections using a long cane or dog guide. The three cities include Portland, Oregon, Cambridge, Massachusetts, and Charlotte, North Carolina. The eight intersections (two in each city) had the following types of geometric and signalization complexity: skewed crosswalk; median; splitter island; right turn lane; more than one left turn lane; offset intersection; leading left turn interval; pedestrian phase on recall; Pushbutton actuated pedestrian phase; split phasing; exclusive pedestrian phasing; mixed exclusive and concurrent pedestrian phasing; and leading pedestrian interval. The data reported here are drawn from Portland, Oregon, only. In a subsequent phase of the research, Accessible Pedestrian Signals (APS) will be installed at each of the eight intersections, and data will again be collected on street crossings, this time using the information provided by the APS.
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DETERMINING RECOMMENDED LANGUAGE FOR SPEECH MESSAGES USED BY ACCESSIBLE PEDESTRIAN SIGNALS: FINAL REPORT
2002Co-Authors: Billie Louise Bentzen, Janet M Barlow, L FranckAbstract:Recently, Audible Pedestrian Signals (APS) that provide audible information (to pedestrians who are blind) from Pushbutton location have been introduced in the United States. In some of these Pushbutton integrated signals, speech messages are being used to indicate the walk interval information, as well as additional information when the pedestrian Pushbutton is pushed during the "don't walk" and "flashing don't walk" intervals. This research on speech messages for APS was undertaken to develop recommendations based on data from stakeholders to form the basis for the establishment of recommended practice for the structure and content of walk messages and Pushbutton messages for directly audible accessible pedestrian signals.
Janet M Barlow - One of the best experts on this subject based on the ideXlab platform.
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Can You See Me Now? Signals for Blind Pedestrians, The New World
IMSA journal, 2008Co-Authors: Lukas Franck, Janet M BarlowAbstract:This article provides detailed information on new technologies for Accessible Pedestrian Signals (APS). While the new types of APS are located at the Pushbutton and provide quieter audible and vibrotactile indications, the Pushbutton and speakers need to be located in close proximity to the departure point. The article also discusses installation and location concerns, pointing out the problems that are present when Pushbuttons are not located close enough to departure points and crosswalks. Planners, engineers, and technicians all play a crucial role in the successful installation and operation of APS.
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Accessible Pedestrian Signals: Details Matter
2007Co-Authors: Janet M BarlowAbstract:This paper highlights some of the most common and dangerous mistakes noted in Accessible Pedestrian Signals (APS) evaluations. U.S. Access Board Draft Public Rights-of-Way Accessibility Guidelines provide specifications for Pushbutton-integrated APS. This type of APS is located at the Pushbutton and provides audible and vibrotactile indications at the Pushbutton location. In addition to audible indications, there are tactile arrows and other features available. However, when not installed properly, APS may not be usable by blind pedestrians and may cause safety problems rather than remedy problems. Many transportation professionals have had little experience with properly installing and adjusting this type of APS. Others, including backwards or incorrect Braille labels, devices with other types of speech message problems such as wrong street name, and APS Pushbuttons mounted in grass or bushes were also seen. In addition, it was noted that in some cases, design drawings and specifications were accurate, but contractors did not install the APS as specified. Careful evaluation of the installations of this new technology is needed to assure that it meets the goals of providing accurate and helpful information to pedestrians, particularly to blind pedestrians.
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Speech Messages for Accessible Pedestrian Signals
Ite Journal-institute of Transportation Engineers, 2004Co-Authors: Billie Louise Bentzen, Janet M Barlow, Lukas FranckAbstract:A panel of experts developed a survey on speech messages for accessible pedestrian signals (APSs). First, the panel developed sample walk and Pushbutton information messages that were applicable to different intersection geometries and signalization patterns and were variable in message content, length and structure. Second, the messages that were judged by most members of the panel to be unambiguous and to clearly convey the minimum necessary information were developed into a survey instrument for obtaining data on preferences for message content and structure. The survey also contained items to evaluate message comprehension. The survey was mailed to 160 stakeholders who were not visually impaired. In addition, it was administrated in Braille, in large print, or orally to 170 pedestrians with visual impairments. Survey results served as bases in developing a recommended practice for the structure and content of walk messages and Pushbutton information messages for push button-integrated APSs. Language: en
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BLIND PEDESTRIANS AT UNFAMILIAR SIGNALIZED INTERSECTIONS: RESEARCH ON SAFETY
2003Co-Authors: Billie Louise Bentzen, Janet M BarlowAbstract:Pedestrians who are blind or visually impaired often travel in unfamiliar areas and cross at signalized intersections. This paper presents the results of part of the first phase of a study of crossings by pedestrians who are blind at unfamiliar complex signalized intersections. Data are being collected, in three cities, with 16 participants who are unable to see crosswalk lines, Pushbutton poles, or pedestrian signals, on the following variables: participants' location in the crosswalk; location in relation to the crosswalk at the end of the crossing; delay after the onset of the walk interval (or parallel straight-ahead traffic); cue used to initiate starting; traffic movements at the end of the walk phase; finding and use of Pushbuttons; and requests for assistance or need for intervention for safety at any part in the sequence of crossing tasks. All participants were accustomed to crossing independently at signalized intersections using a long cane or dog guide. The three cities include Portland, Oregon, Cambridge, Massachusetts, and Charlotte, North Carolina. The eight intersections (two in each city) had the following types of geometric and signalization complexity: skewed crosswalk; median; splitter island; right turn lane; more than one left turn lane; offset intersection; leading left turn interval; pedestrian phase on recall; Pushbutton actuated pedestrian phase; split phasing; exclusive pedestrian phasing; mixed exclusive and concurrent pedestrian phasing; and leading pedestrian interval. The data reported here are drawn from Portland, Oregon, only. In a subsequent phase of the research, Accessible Pedestrian Signals (APS) will be installed at each of the eight intersections, and data will again be collected on street crossings, this time using the information provided by the APS.
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DETERMINING RECOMMENDED LANGUAGE FOR SPEECH MESSAGES USED BY ACCESSIBLE PEDESTRIAN SIGNALS: FINAL REPORT
2002Co-Authors: Billie Louise Bentzen, Janet M Barlow, L FranckAbstract:Recently, Audible Pedestrian Signals (APS) that provide audible information (to pedestrians who are blind) from Pushbutton location have been introduced in the United States. In some of these Pushbutton integrated signals, speech messages are being used to indicate the walk interval information, as well as additional information when the pedestrian Pushbutton is pushed during the "don't walk" and "flashing don't walk" intervals. This research on speech messages for APS was undertaken to develop recommendations based on data from stakeholders to form the basis for the establishment of recommended practice for the structure and content of walk messages and Pushbutton messages for directly audible accessible pedestrian signals.
