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Your search keyword '"Ramadurai, Sruthi"' showing total 12 results
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12 results on '"Ramadurai, Sruthi"'

1. Effect of Human Involvement on Work Performance and Fluency in Human-Robot Collaboration for Recycling

Author

Ramadurai, Sruthi and Jeong, Heejin

Subjects
Computer Science - Robotics, I.4.0
Abstract

Human-robot collaboration has significant potential in recycling due to the wide variation in the composition of recyclable products. Six participants performed a recyclable item sorting task collaborating with a robot arm equipped with a vision system. The effect of three different levels of human involvement or assistance to the robot (Level 1- occlusion removal; Level 2- optimal spacing; Level 3- optimal grip) on performance metrics such as robot accuracy, task time and subjective fluency were assessed. Results showed that human involvement had a remarkable impact on the robot's accuracy, which increased with human involvement level. Mean accuracy values were 33.3% for Level 1, 69% for Level 2 and 100% for Level 3. The results imply that for sorting processes involving diverse materials that vary in size, shape, and composition, human assistance could improve the robot's accuracy to a significant extent while also being cost-effective., Comment: Accepted as a Late-Breaking Report in the 17th ACM/IEEE International Conference on Human-Robot Interaction (HRI), 2022. 4 pages with 5 figures

Published
2022
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4. Physiological Indicators of Fluency and Engagement during Sequential and Simultaneous Modes of Human-Robot Collaboration

Author

Ramadurai, Sruthi, Gutierrez, Christian, Jeong, Heejin, and Kim, Myunghee

Abstract

OCCUPATIONAL APPLICATIONSAn understanding of fluency in human-robot teaming from a physiological standpoint is still incomplete. In our experimental study involving 24 participants, we designed a scenario for shared-space human-robot collaboration (HRC) for a material sorting task. When compared to a sequential mode of interaction, the simultaneous mode resulted in significantly higher perceptions of fluency and engagement, primarily by reducing human idle time. These observations were complemented by significant changes in physiological responses, such as ECG entropy and low frequency power. These responses could predict fluency and engagement with accuracies of 90 and 97%, respectively. Notably, the perception of fluency and preferred mode of interaction were influenced by individual preferences. Hence, it is crucial to consider both physiological responses and user preferences when designing HRC systems, to ensure a positive experience with the robot teammate and to foster engagement in long-term teamwork. Furthermore, these signals can be obtained using a single robust, low-cost, and comfortable sensor.

Published
2024
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12. Comparison of 5-Year Clinical Outcomes between Pressure Drop Coefficient and Fractional Flow Reserve in Patients with Coronary Artery Disease

Author

Ramadurai, Sruthi

Subjects
Mechanical Engineering, pressure drop coefficient, fractional flow reserve, intermediate coronary stenosis, microvascular disease, interventional cardiology, clinical outcomes
Abstract

Background: The current pressure-based coronary diagnostic index, fractional flow reserve (FFR), has a limited efficacy in the presence of microvascular disease (MVD). To overcome the limitations of FFR, we recently introduced the pressure drop coefficient (CDP), a fundamental fluid dynamics-based index that combines pressure and flow.Methods: We hypothesize that the CDP will result in better clinical outcomes in comparison to the FFR. In order to test our hypothesis, comparison of percent major adverse cardiac events (MACE) at 5 years between the FFR27.9 groups was performed using the two-tailed Chi-squared test. Further, Kaplan Meier survival curves were compared between the FFR and CDP groups. The study also assessed the efficacy of CDP in delineating epicardial stenosis in two patient sub-groups associated with MVD. Results were considered statistically significant for p25.4 was also performed.Results: For the complete patient group, the % MACE in the CDP>27.9 group (10 out of 35, 29%) was lower in comparison to the FFR27.9 group (n=35), when compared to the FFR

Published
2020

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