The Experts below are selected from a list of 2643 Experts worldwide ranked by ideXlab platform

T Ishimatsu - One of the best experts on this subject based on the ideXlab platform.

  • modeling of a stair climbing Wheelchair mechanism with high single step capability
    IEEE Transactions on Neural Systems and Rehabilitation Engineering, 2003
    Co-Authors: Murray Lawn, T Ishimatsu
    Abstract:

    In the field of providing mobility for the elderly and disabled, the aspect of dealing with stairs continues largely unresolved. This paper focuses on presenting the development of a stair-climbing Wheelchair mechanism with high single-step capability. The mechanism is based on front and rear wheel clusters connected to the base (chair) via Powered linkages so as to permit both autonomous stair ascent and descent in the forward direction, and high single-step functionality for such as direct entry to and from a van. Primary considerations were inherent stability, provision of a mechanism that is physically no larger than a standard Powered Wheelchair, aesthetics, and being based on readily available low-cost components.

  • Modeling of a Stair-Climbing Wheelchair Mechanism With High Single-Step Capability
    2003
    Co-Authors: Murray J Lawn, T Ishimatsu
    Abstract:

    Abstract — In the field of providing mobility for the elderly and disabled the aspect of dealing with stairs continues largely unresolved. This paper focuses on presenting the development of a stair-climbing Wheelchair mechanism with high single step capability. The mechanism is based on front and rear wheel clusters connected to the base (chair) via Powered linkages so as to permit both autonomous stair ascent and descent in the forward direction, and high single step functionality for such as direct entry to and from a van. Primary considerations were inherent stability, provision of a mechanism that is physically no larger than a standard Powered Wheelchair, aesthetics and being based on readily available low cost components. Index Terms — stair-climbing, Wheelchair, wheel cluste

Murray Lawn - One of the best experts on this subject based on the ideXlab platform.

  • modeling of a stair climbing Wheelchair mechanism with high single step capability
    IEEE Transactions on Neural Systems and Rehabilitation Engineering, 2003
    Co-Authors: Murray Lawn, T Ishimatsu
    Abstract:

    In the field of providing mobility for the elderly and disabled, the aspect of dealing with stairs continues largely unresolved. This paper focuses on presenting the development of a stair-climbing Wheelchair mechanism with high single-step capability. The mechanism is based on front and rear wheel clusters connected to the base (chair) via Powered linkages so as to permit both autonomous stair ascent and descent in the forward direction, and high single-step functionality for such as direct entry to and from a van. Primary considerations were inherent stability, provision of a mechanism that is physically no larger than a standard Powered Wheelchair, aesthetics, and being based on readily available low-cost components.

Rory A Cooper - One of the best experts on this subject based on the ideXlab platform.

  • Evaluating the usability of a smartphone virtual seating coach application for Powered Wheelchair users.
    Medical engineering & physics, 2016
    Co-Authors: Hsin-yi Liu, Annmarie Kelleher, Jonathan Pearlman, Rory A Cooper
    Abstract:

    The aim of the smartphone virtual seating coach (SVSC) was to provide a personalized reminder/warning system to encourage Powered Wheelchair users to use their Powered seating functions (PSFs) as clinically recommended. This study evaluated the usability of the SVSC system by gathering feedback from five Powered Wheelchair users and five rehabilitation professionals through questionnaires and interviews. The results indicated that clear and understandable instructions to adjust the PSFs are the most important requirement for SVSC application. The instructions must be intuitive, could benefit from animations or indications of PSFs control buttons so Powered Wheelchair users can adjust their PSFs immediately and appropriately.

  • an interview study for developing a user guide for Powered seating function usage
    Disability and Rehabilitation: Assistive Technology, 2014
    Co-Authors: Hsin-yi Liu, Rosemarie Cooper, Annmarie Kelleher, Rory A Cooper
    Abstract:

    AbstractPurpose: Powered seating functions (PSFs) provide Powered Wheelchair users an independent means to adjust posture dynamically. To facilitate the best use of PSFs in daily living, we conducted this structured interview study to develop a preliminary user guide to provide “take-home” information to Powered Wheelchair users. Method: An internally developed questionnaire to assess clinical recommendations of PSF usage was administered in an interview format to clinical seating and mobility specialists. A qualitative analysis was applied to codify the recommendations, and the findings were transformed into a PSF user guide. Results: Specific but varied seating positions and temporal indications were recommended for performing pressure relief positioning. For several activities, appropriate seating positions should be determined according to the immediate physical condition of the user and/or the environmental settings. Conclusion: The methods and positions of using PSFs should be determined with consid...

  • an experimental method for measuring the moment of inertia of an electric power Wheelchair
    International Conference of the IEEE Engineering in Medicine and Biology Society, 2007
    Co-Authors: Hongwu Wang, Garrett G Grindle, Sam Connor, Rory A Cooper
    Abstract:

    This study describe an experiment measuring the moment of inertia of an electric Powered Wheelchair (EPW) using a torsional pendulum method. Inertia of the Wheelchair is an important factor for control, which is a key issue in Wheelchair driving. The experimental test platform consisted of a bottom circular wood plate, an upper metal plate, and four ropes. Materials with known moments of inertia such as the metal disk and cylinder were used to test the accuracy of the system. The EPW used in the experiment was Invacare G3 Torque SP Storm Series. The measured result of the moment inertia of the Wheelchair was 5.2280 kg-m2 and the errors of the system are less than 10% even when the object is only 251bs. The results are consistent when compared with other approximate methods. In addition, the experimental method could be used to measure the moment of inertia of manual Wheelchairs and other irregular objects.

  • tips and falls during electric Powered Wheelchair driving effects of seatbelt use legrests and driving speed
    Archives of Physical Medicine and Rehabilitation, 2003
    Co-Authors: Thomas A Corfman, Rory A Cooper, Shirley G Fitzgerald, Rosemarie Cooper
    Abstract:

    Abstract Corfman TA, Cooper RA, Fitzgerald SG, Cooper R. Tips and falls during electric-Powered Wheelchair driving: effects of seatbelt use, legrests, and driving speed. Arch Phys Med Rehabil 2003:84:1797–802. Objective To measure the response of a test dummy while traversing common obstacles encountered by users of electric-Powered Wheelchairs (EPWs) to determine whether optimal Wheelchair fit, use of seatbelts, and driving speed affect the frequency and severity of EPW tips and falls. Design Repeated-measures comparison study. Setting Constructed environment both in and around a Veterans Affairs medical center. Participant A 50th percentile Hybrid II anthropometric test dummy (ATD) was used to simulate a person driving an EPW. Interventions The ATD was driven in 4 different EPWs over commonly encountered obstacles at speeds of 1 and 2m/s, with and without the use of a seatbelt, and at varying legrest heights. Main outcome measures The response and motion of the ATD were observed and recorded as no fall, loss of control (the ATD falls forward or sideways but remains in the EPW), the ATD falls out of the EPW, or the EPW tips completely. Results A total of 97 adverse events out of 1700 trials were recorded: 88 were losses of control (instability) and 9 were ATD falls. No complete tips of any EPW occurred. Univariate statistical analysis indicated a significant relationship between the adverse events and the use of seatbelts, legrest condition, and test obstacles (P Conclusion Persons who use EPWs should use seatbelts and legrests while driving their EPWs, and clinicians should include common driving tasks when assessing the proper set-up of EPWs.

William C. Miller - One of the best experts on this subject based on the ideXlab platform.

  • stakeholder perspectives of pediatric Powered Wheelchair standing devices a qualitative study
    Developmental Medicine & Child Neurology, 2021
    Co-Authors: Lisa K Kenyon, Kelsey L Harrison, Megan K Huettner, Sarah B Johnson, William C. Miller
    Abstract:

    Aim To explore and describe the experiences and perspectives of various stakeholders regarding the use of Powered Wheelchair standing devices (PWSDs). Method The purposive sample included: children aged 6 to 18 years who used a PWSD (n=8; diagnoses: cerebral palsy, spinal muscular atrophy, spina bifida, spinal cord injury), parents of children 18 years of age or younger who used a PWSD (n=12), rehabilitation professionals working with children who used a PWSD (n=12), and professionals working at companies manufacturing PWSDs (n=3). Data were gathered via face-to-face interviews conducted either in person or via Zoom® and analyzed using the constant comparative method. Results Three main themes emerged in the data: (1) 'Stand-on-demand' revealed how participants perceived PWSDs as allowing children to stand whenever and wherever they wanted, thereby increasing participation; (2) 'It's more than weight-bearing' uncovered participants' perceptions of psychological and physical benefits from PWSD use; and (3) 'Ecosystems influencing PWSD acquisition and use' revealed child- and non-child-related factors perceived as influencing children's procurement and use of a PWSD. Interpretation Use of a PWSD was perceived as providing a unique opportunity for children to stand whenever and wherever they desired. Findings suggest the possible transdiagnostic application of PWSDs.

  • Understanding the Burden Experienced by Caregivers of Older Adults Who Use a Powered Wheelchair: A Cross-Sectional Study
    SAGE Publishing, 2017
    Co-Authors: Paula W. Rushton, Delphine Labbé, Louise Demers, William C. Miller, William B. Mortenson, Lee R Kirby
    Abstract:

    Objective: In this study, we aimed to describe the burden of family caregivers providing Powered Wheelchair-related and overall assistance and test the hypotheses that caregiver burden correlates with participation, Wheelchair skills capacity, anxiety, depression, and social support. Methods: Cross-sectional study. Participants included 35 family caregivers of Powered Wheelchair users. Caregivers were assessed using the Power Mobility Caregiver Assistive Technology Outcome Measure, Late Life Disability Instrument, Wheelchair Skills Test Questionnaire for caregivers, Hospital Anxiety and Depression Scale, and Interpersonal Support Evaluation List–12. Results: The most burdensome Powered Wheelchair assistance items were providing verbal hints/directions, needing to be nearby, anxiety, and fear that user may be harmed. The most burdensome overall assistance item was feeling limited in recreational/leisure activities. Caregiver burden was significantly correlated with participation limitations, anxiety, depression, and social support. Discussion: Caregivers experience burden for Wheelchair-related and overall help, especially psychological burden. Such results have implications for the type of resources required to support family caregivers

Jong Sung Kim - One of the best experts on this subject based on the ideXlab platform.

  • a biosignal based human interface controlling a power Wheelchair for people with motor disabilities
    Etri Journal, 2006
    Co-Authors: Kihong Kim, Jong Sung Kim, Hong Kee Kim, Wookho Son, Sooyoung Lee
    Abstract:

    An alternative human interface enabling people with severe motor disabilities to control an assistive system is presented. Since this interface relies on the biosignals originating from the contraction of muscles on the face during particular movements, even individuals with a paralyzed limb can use it with ease. For real-world application, a dedicated hardware module employing a general-purpose digital signal processor was implemented and its validity tested on an electrically Powered Wheelchair. Furthermore, an additional attempt to reduce error rates to a minimum for stable operation was also made based on the entropy information inherent in the signals during the classification phase. In the experiments, most of the five participating subjects could control the target system at their own will, and thus it is found that the proposed interface can be considered a potential alternative for the interaction of the severely disabled with electronic systems. disabled lead a more improved life have been addressed, and corresponding effort has also been made in the fields related to rehabilitation engineering and user interface (UI) development. One attempt attracting considerable attention in those fields involves the utilization of biosignals such as an electroencephalogram (EEG) or electromyogram (EMG) obtainable from the human body as a means for interaction with the surrounding world. In the field of brain-computer interface (BCI), meaningful information derived directly from a user's brain activity has been used to manipulate systems. However, despite the definite advantage unique to EEG signals that allows a system to be controlled only by one's thoughts, the poor signal-to-noise ratios in the spontaneous EEG signals and the lack of consistency in the signal patterns still make their application impractical. Compared to such drawbacks of EEG signals, EMG signals have more possibility to be applied to a wide range of users due to their easy controllability and insensitiveness to noises (1). In this letter, a special interface based on these EMG signals that runs in a stand-alone mode is proposed, and its usefulness as a communication channel is investigated through a practical test on an electrically Powered Wheelchair, called a power-Wheelchair throughout this letter.

  • Human-machine interface for Wheelchair control with EMG and its evaluation
    Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439), 2003
    Co-Authors: Jeong Su Han, H.-e. Lee, Zeungnam Bien, Dae-jin Kim, Jong Sung Kim
    Abstract:

    The objective of this paper is to develop a Powered Wheelchair controller based on EMG for users with high-level spinal cord injury. EMG is very naturally measured when the user indicating a certain direction and the force information which will be used for the speed of Wheelchair is easily extracted from EMG. Furthermore, the emergency situation based on EMG will be checked relatively ease. We classified the pre-defined motions such as rest case, forward movement, left movement, and right movement by fuzzy min-max neural networks (FMMNN). This classification results and evaluation results with real users shows the feasibility of EMG as an input interface for Powered Wheelchair.