Presentation Title

Wearable sensor-based mobility analysis in unstable environments using the computer assisted rehabilitation environment (CAREN) system

Advisor Information

Jong-Hoon Youn

Location

MBSC Gallery Room 308 - G

Presentation Type

Oral Presentation

Start Date

4-3-2022 9:00 AM

End Date

4-3-2022 10:15 AM

Abstract

Walking in a moving environment like a ship will be different from walking on stable ground. Extreme fluctuations of the ship may endanger the safety of the crews. Notably, a loss of balance on board can lead to an accident of falling off a ship. Örtlund and Malin found that among 22 people who fall off a cruise ship every year, 79 percent of them die or go missing. Keeping one’s balance on board a ship is strongly influenced by the motion of ships. Therefore, the objective of this study is to determine how walking on a ship differs from walking on a stable environment and how one’s ability to maintain balance changes with the rolling degree of the platform. We hypothesized that step time variability and center of mass (COM) and margin of stability (MOS) would significantly differ between stable and unstable walking conditions. We recruited 30 healthy individuals between 19 and 55 years old for this project. During the study, participants walked on treadmills for two minutes without rolling at their self-selected speeds, and they also walked on a computer-assisted rehabilitation environment (CAREN) system. The CAREN system was used to simulate the parametric roll motion of ships (up to 20 degrees). In this study, we found a significant difference in step time variability, mediolateral (ML) COM excursion, and MOS variability in ML direction between stable and unstable walking conditions. This study would help us better understand walking characteristics in moving ships and protect seafarers by predicting falls overboard.

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Mar 4th, 9:00 AM Mar 4th, 10:15 AM

Wearable sensor-based mobility analysis in unstable environments using the computer assisted rehabilitation environment (CAREN) system

MBSC Gallery Room 308 - G

Walking in a moving environment like a ship will be different from walking on stable ground. Extreme fluctuations of the ship may endanger the safety of the crews. Notably, a loss of balance on board can lead to an accident of falling off a ship. Örtlund and Malin found that among 22 people who fall off a cruise ship every year, 79 percent of them die or go missing. Keeping one’s balance on board a ship is strongly influenced by the motion of ships. Therefore, the objective of this study is to determine how walking on a ship differs from walking on a stable environment and how one’s ability to maintain balance changes with the rolling degree of the platform. We hypothesized that step time variability and center of mass (COM) and margin of stability (MOS) would significantly differ between stable and unstable walking conditions. We recruited 30 healthy individuals between 19 and 55 years old for this project. During the study, participants walked on treadmills for two minutes without rolling at their self-selected speeds, and they also walked on a computer-assisted rehabilitation environment (CAREN) system. The CAREN system was used to simulate the parametric roll motion of ships (up to 20 degrees). In this study, we found a significant difference in step time variability, mediolateral (ML) COM excursion, and MOS variability in ML direction between stable and unstable walking conditions. This study would help us better understand walking characteristics in moving ships and protect seafarers by predicting falls overboard.