Browsing by Author "Islam, Md Shafiqul"

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    Changes in forklift driving performance and postures among novices resulting from training using a high-fidelity virtual reality simulator: An exploratory study
    Islam, Md Shafiqul; Zahabi, Saman Jamshid Nezhad; Kim, Sunwook; Lau, Nathan; Nussbaum, Maury A.; Lim, Sol (Elsevier, 2024-11-01)
    Virtual reality (VR) has emerged as a promising tool for training. Our study focused on training for forklift driving, to address an ongoing worker shortage, and the unknown impact of repeated VR training on task performance and kinematic adaptations. We trained 20 novice participants using a VR forklift simulator over two days, with two trials on each day, and including three different driving lessons of varying difficulties. Driving performance was assessed using task completion time, and we quantified kinematics of the head, shoulder, and lumbar spine. Repeated training reduced task completion time (up to ∼29.8% of initial trial) and decreased both kinematic variability and peak range of motion, though these effects were larger for lessons requiring higher precision than simple driving maneuvers. Our results highlight the potential of VR as an effective training environment for novice drivers and suggest that monitoring kinematics could help track skill acquisition during such training.
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    Effects of vibrotactile feedback on yoga practice
    Islam, Md Shafiqul; Lee, Sang Won; Harden, Samantha M.; Lim, Sol (Frontiers, 2022-10-31)
    Participating in physical exercise using remote platforms is challenging for people with vision impairment due to their lack of vision. Thus, there is a need to provide nonvisual feedback to this population to improve the performance and safety of remote exercise. In this study, the effects of different nonvisual types of feedback (verbal, vibrotactile, and combined verbal and vibrotactile) for movement correction were tested with 22 participants with normal vision to investigate the feasibility of the feedback system and pilot tested with four participants with impaired vision. The study with normal-vision participants found that nonvisual feedback successfully corrected an additional 11.2% of movements compared to the no-feedback condition. Vibrotactile feedback was the most time-efficient among other types of feedback in correcting poses. Participants with normal vision rated multimodal feedback as the most strongly preferred modality. In a pilot test, participants with impaired vision also showed a similar trend. Overall, the study found providing vibrotactile (or multimodal) feedback during physical exercise to be an effective way of improving exercise performance. Implications for future training platform development with vibrotactile or multimodal feedback for people with impaired vision are discussed.
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    Forklift Driving Performance of Novices with Repeated VR-based Training
    Islam, Md Shafiqul; Jamshid Nezhad Zahabi, Saman; Kim, Sunwook; Lau, Nathan; Nussbaum, Maury A.; Lim, Sol (SAGE, 2023-10-19)
    Virtual reality (VR) has emerged as a promising tool for training novice forklift drivers, but temporal patterns of such improvements are largely unknown. We trained 19 novice participants using an order-picker VR simulator on a selected driving lesson. In two sessions, participant driving performance was assessed using task completion time and kinematics of the head, shoulder, and lumbar spine via inertial measurement units (IMUs). Completion time and head flexion/movement decreased significantly (up to 22.4% and 31.5%, respectively). The observed changes in head motion (flexion/extension) indicate an initial adjustment period to prepare a mental model of the driving task and the control panel, which was also adapted over repeated trials. One implication of our results is that reduced head flexion/extension could be used as an indication of a novice driver’s improved skill during the early stages of training, in terms of familiarizing themselves with vehicle control and the vehicle control panel.
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    See You on the Other Side: A Crosswalk Navigation System with Multimodal Alert System for Distracted and Visually Impaired Crosswalk Users
    Werner, Alec; Islam, Md Shafiqul; Nachiappan, Anvitha; Bafna, Tanishq; Movassagh, Maryam; Jeon, Myounghoon (SAGE, 2023-10-21)
    Distracted and visually impaired crosswalk users are at increased injury and death risk. A system that redirects the attention of distracted crosswalk users and helps both distracted and visually-impaired crosswalk users safely navigate crosswalks could mitigate that risk. We tested the effectiveness of four feedback systems on crosswalk navigation: no feedback (baseline), auditory (whistle), vibrotactile, and multimodal (auditory and vibrotactile). Twelve participants were recruited and blindfolded to cross an in-lab mock crosswalk. Analysis showed that multimodal auditory and vibrotactile feedback significantly increased the success rate of navigating through a crosswalk compared to the baseline. Among the participants, 83.3% (10 participants) preferred vibrotactile feedback, and 75% (9 participants) found vibrotactile feedback to be most intuitive. These findings can inform the development of infrastructure-embedded alert systems that promote the safety of distracted crosswalk users.