Human Activity Recognition (HAR) has been widely addressed by deep learning techniques. However, most prior research applied a general unique approach (signal processing and learning) to deal with different human activities including postures gestures. These types of activity typically have highly diverse motion characteristics, which could be captured wearable sensors placed on the user’s body...

Cheng et al 1 have discussed using a dynamic posterior stabilization device to treat asymmetric collapse of an artificial disc in the coronal plane. Although this may correct the radiographic coronal-plane abnormality, there are significant biomechanical considerations to be kept in mind. When using these 2 devices in conjunction with each other at the same motion segment, the degrees of freedo...

Background: Femoroacetabular impingement (FAI) syndrome, or hip impingement, is a musculoskeletal condition affecting the joint. It involves motion- position-related pain originating from an abnormal, premature contact between femoral head-neck junction (femur) and acetabular rim (rim around socket). Cumulative repetitive mechanical overloads at joint appear to contribute development of FAI. Ho...

Experimental research and analysis was focused on developing a lower neck rear impact injury criterion. Development was based on correlations between spinal kinematics and lower neck loads obtained using human cadaver intact head-neck complex specimens. Kinematics were significantly dependent (p<0.05) upon gender and spinal level. Anterior-posterior shear force demonstrated highest correlations...

OBJECTIVE This study investigated the effects of task precision demands on behavioral and physiological changes during repetitive asymmetric lifting. BACKGROUND Repetitive lifting encountered in manual material handling leads to muscle fatigue and is a documented risk factor for low back disorder. METHOD A total of 17 healthy volunteers performed repetitive asymmetric lifting for 60 min (10...

This study regards the problem of incorrect stereo matches due to the occurrence of repetitive structures in the scene. In stereo vision, repetitive structures may lead to “phantom objects” in front of or behind the true scene which cause severe problems in scenarios involving mobile robot navigation or human-robot interaction. To alleviate this problem, we propose a model-based method which is...

Shear force remains a viable candidate for a lower neck rear impact injury criterion. At the 2007 IRCOBI meeting, data were presented demonstrating a correlation between lower neck shear force and cervical facet joint motions. The present study consisted of three parts. A review of automotive literature correlated lower neck shear force to experimentally-induced injuries in PMHS and demonstrate...

Mobile manipulator robotic systems (MMRSs) composed of a manipulator and a mobile platform are investigated in this paper. In order for the mobile manipulator robotic system (MMRS) to return to its initial state when the manipulator’s end-effector is requested to execute cyclical tasks, a quadratic program (QP) based repetitive motion planning and feedback control (RMPFC) scheme is proposed and...

The position of on-body motion sensors plays an important role in human activity recognition. Most often, mobile phone sensors at the trouser pocket or an equivalent position are used for this purpose. However, this position is not suitable for recognizing activities that involve hand gestures, such as smoking, eating, drinking coffee and giving a talk. To recognize such activities, wrist-worn ...