Jumping Further: Forward Jumps in a Gravity-reduced Immersive Virtual Environment

Kang, HyeongYeop; Lee, Geonsun; Kang, Dae Seok; Kwon, Ohuna; Cho, Jun Yeup; Choi, Hojung; Han, JunaHvun

doi:10.1109/vr.2019.8798251

Cited by 10 publications

(6 citation statements)

References 28 publications

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“…kr/ main/), to reduce the weight of the backpack worn by the user. Control method of the system is similar to the previous research about reducing gravity (Kang et al 2019;Dungan et al 2015). The WSS can cover our VR area of 5m × 5m , allowing a user to experience our VR simulation with less load in the area.…”

Section: Weight Support Systemmentioning

confidence: 94%

“…They evaluated the suits with different and modified PQ forms because the best method for measuring the presence of systems that incorporate various structures of haptic devices and VE has not been verified. However, the PQ forms include the involvement factor in many studies (Barreiros et al 2018;Kang et al 2019;Jain et al 2016;Günther et al 2020b, a). Therefore, the involvement factor is used in this study to evaluate the developed PA suit system.…”

Section: Presence Evaluationmentioning

confidence: 99%

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Pneumatic and acoustic suit: multimodal haptic suit for enhanced virtual reality simulation

2023

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A haptic device provides users with physical feedback to enhance their experience in virtual reality (VR). We developed a multimodal haptic suit, called as Pneumatic and Acoustic (PA) suit, which exhibits high-resolution haptic feedback, and applies high pressure and realistic vibration to a user. The PA suit artificially simulates the sensation of brief and strong collisions such as the impact of an explosion, ball, or fist. The pneumatic actuators, consisting of 40 air bladders, are designed as bellows-type pneumatic devices for vertical inflation. The air bladders are placed on the chest at an equal interval distance of 30 mm for high-resolution feedback. The acoustic actuators use an effective sound signal of a collision similar to realistic vibrations. This study aims to examine the effectiveness of our multimodal haptic suit in improving VR experience of users. The recognition tests clearly show that participants distinguish between the haptic patterns and position of collided virtual objects with the suit. The user study involving a collision of a ball shows that the PA suit transmits the approximate pressure of a real ball collision with artificial haptic feedback. Our receiving ball and explosion VR simulations confirm that the PA suit improves a VR experience depending on the types of actuators and VR contents. The results prove that the PA suit creates distinguishable haptic patterns for guiding a task and improves the VR experience of users with powerful and multimodal haptic feedback hence providing high-quality VR simulation.

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Section: Weight Support Systemmentioning

confidence: 94%

Section: Presence Evaluationmentioning

confidence: 99%

Pneumatic and acoustic suit: multimodal haptic suit for enhanced virtual reality simulation

2023

Self Cite

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“…At present, little is known about upper limb motion under HG as most of the experiments are limited to those performed on the lower limbs ( Richter et al, 2017 ; Hewes and Spady, 1964 ; Rajulu and Klute, 1992 ; Newman and Alexander, 1993 ; Sylos-Labini et al, 2014 ; Kang et al, 2019 ; Weber et al, 2019 ). To the author’s knowledge, studies of sitting positions when performing manual handling with operational weights under HG have recently been reported only once in a publication ( Volkova et al, 2022 ) and thesis ( Volkova, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Hypogravity modeling of upper extremities: an investigation of manual handling in the workplace

Maillard

2023

Front. Physiol.

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Experiments on the lower limbs are the only approaches being used to study how hypogravity (HG) (0 < g < 1, e.g., Moon: 1/6 g, Mars: 3/8 g) affects human movement. The goal of this study was to expand this field experimentally by investigating the effect of HG on the upper extremities during one-handed manual handling tasks in a sitting posture: static weight holding with an outstretched arm, and slow repetitive weight lifting and lowering motions. The hypothesis was that while completing static and dynamic tasks with elements of repetition in HG, the upper body’s tilt (angle regarding the vertical axis) would change differently from Earth’s gravity. Specifically, upper arm and spine angles, joint torques, and forces were investigated. Twenty-four healthy participants aged 33.6 ± 8.2 years were involved in the trial. Joint angles were examined using vision-based 3D motion analysis. According to this investigation, there is a correlation between a body tilting backward and a gravity level reduction (p < 0.01). Thus, HG causes postural deviation, and this shows that workplace design must be adapted according to the level of gravity to promote comfortable and balanced body alignment, minimizing stress on muscles and joints. To lower the risk of musculoskeletal disorders (MSDs), enhance overall performance, and increase job satisfaction, proper support systems and restrictions for sitting positions should be taken into account, concerning different levels of gravity.

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“…Upper limb motion under HG remains poorly understood, as most research focuses on lower limbs [10][11][12]. Few studies have explored sitting positions with operational weights under HG [13].…”

Section: Introductionmentioning

confidence: 99%

The Three-Dimensional Body Center of Mass at the Workplace under Hypogravity

Maillard

2023

Bioengineering

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The center of mass dynamics of the seated posture of humans in a work environment under hypogravity (0 < g < 1) have rarely been investigated, and such research is yet to be carried out. The present study determined the difference in the body system of 32 participants working under simulated 1/6 g (Moon) and 1 g (Earth) for comparison using static and dynamic task measurements. This was based on a markerless motion capture method that analyzed participants’ center of mass at the start, middle and end of the task when they began to get fatigued. According to this analysis, there is a positive relationship (p < 0.01) with a positive coefficient of correlation between the downward center of mass body shift along the proximodistal axis and gravity level for males and females. At the same time, the same positive relationship (p < 0.01) between the tilt of the body backward along the anterior–posterior axis and the level of gravity was found only in females. This offers fresh perspectives for comprehending hypogravity in a broader framework regarding its impact on musculoskeletal disorders. It can also improve workplace ergonomics, body stability, equipment design, and biomechanics.

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Jumping Further: Forward Jumps in a Gravity-reduced Immersive Virtual Environment

Cited by 10 publications

References 28 publications

Pneumatic and acoustic suit: multimodal haptic suit for enhanced virtual reality simulation

Pneumatic and acoustic suit: multimodal haptic suit for enhanced virtual reality simulation

Hypogravity modeling of upper extremities: an investigation of manual handling in the workplace

The Three-Dimensional Body Center of Mass at the Workplace under Hypogravity

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