Hoan Duc Tran
List of my past and current projects
Explore the effect of visual stimuli on ASD screening
Autism spectrum disorder (ASD) is one of the most common childhood developmental disorders. Early detection and intervention for ASD are critical for increasing child success. In the past decade, utilizing the abnormal eye gaze characteristics of children with autism in regard to certain visual stimuli is emerging as a screening approach due to its cost-efficiency and promising accuracy. However, the effect of visual stimulus on children with ASD has not been considered as a diagnostic consideration in the past. In this paper, we first create a visual stimuli database based on an extensive literature review, then we examine the impact of picture stimuli and exposure time on the quantitative accuracy of screenings for ASD. This is done by extracting gaze distribution in a 2-D space and comparing children with ASD to typical peers using the 1st Wasserstein distance. A group of 32 participants with ASD and typical development (TD) were recruited for the study. The f-score accuracy results demonstrate the impact of implementing visual stimulus on screening for ASD. Our study demonstrates that the parsing of "social scene" stimulus with 5-second exposure time has the best performance at 98.24%
Home-based system for evaluation and rehabilitation of stroke patient
Bilateral coordination and hand grip strength are fundamental factors in constructing efficient movements to perform daily life tasks. Following stroke, motor impairments such as diminished strength and coordination reduce the ability to perform activities of daily living. While the existing healthcare system focuses on rehabilitation in the first few months following stroke, there is little to support rehabilitation efforts across the lifespan. Patients with stroke are commonly sent home only with a written home exercise program. In this study, we propose a novel solution to support home rehabilitation focusing on two aims: (1) Development of a home-based bi-manual grip rehabilitation and evaluation system. Its hardware and software program follow the design consideration of a task-oriented system for bilateral grip control emphasizing modulation of grip force and coordination between hands. (2) Innovating evaluation of motor control performance by means of a quantitative performance matrices framework. A total of 18 subjects, 6 young healthy adults, 6 healthy older adults and 6 adults with stroke participated in the experiment testing the system. This approach allows us to examine performance across the lifespan and when injury to the nervous system is present. Participants with stroke gave positive feedback regarding applicability, agreeing to strongly agreeing that this is a useful home rehabilitation system (4.4/5). The favorable remarks encourage refinement of the sytem to improve both usability and evaluation of performance. This initial study sets the foundation to progress the system.
Using ECG signal for identification purpose