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Contact Dynamic Behaviors of Magnetic Hydrogel Soft Robots.
Gels
December 2024
Department of Mechanics and Engineering Science, School of Physics, Nanjing University of Science and Technology, Nanjing 210094, China.
Magnetic hydrogel soft robots have shown great potential in various fields. However, their contact dynamic behaviors are complex, considering stick-slip motion at the contact interface, and lack accurate computational models to analyze them. This paper improves the numerical computational method for hydrogel materials with magneto-mechanical coupling effect, analyses the inchworm-like contact motion of the biomimetic bipedal magnetic hydrogel soft robot, and designs and optimizes the robot's structure.
View Article and Find Full Text PDFThe seepage model for CO in Shale considering dynamic slippage, effective stress and gas adsorption.
Sci Rep
December 2024
School of Mechanics and Engineering, Liaoning Technical University, Fuxin, 123000, Liaoning, China.
This paper first conducted a shale injection CO seepage experiment based on an improved single-vessel pressure pulse attenuation method. The experimental results reveal that the evolution pattern of shale permeability with respect to pore pressure can be divided into before and after phase change. The overall trend is that it first decreases and then increases, which is not a simple exponential form.
View Article and Find Full Text PDFCompulsion is associated with impaired goal-directed and habitual learning and responding in obsessive-compulsive disorder.
Int J Clin Health Psychol
December 2024
Medical Psychological Center, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
Background: Previous research has found that compulsions in obsessive-compulsive disorder (OCD) are associated with an imbalance between goal-directed and habitual responses. However, the cognitive mechanisms underlying how goal-directed and habitual behaviors are learned, and how these learning deficits affect the response process, remain unclear. The present study aimed to investigate these cognitive mechanisms and examine how they were involved in the mechanism of compulsions.
View Article and Find Full Text PDFDirect Prosthesis Force Control with Tactile Feedback May Connect with the Internal Model.
medRxiv
December 2024
Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States.
Introduction: Dynamic modulation of grip occurs mainly within the major structures of the brain stem, in parallel with cortical control. This basic, but fundamental level of the brain, is robust to ill-formed feedback and to be useful, it may not require all the perceptual information of feedback we are consciously aware. This makes it viable candidate for using peripheral nerve stimulation (PNS), a form of tactile feedback that conveys intensity and location information of touch well but does not currently reproduce other qualities of natural touch.
View Article and Find Full Text PDFFractional Dolphin Tenotomy for Boutonniere Deformity: A Cadaveric Study.
J Hand Surg Glob Online
November 2024
Department of Orthopaedics, The University of North Carolina School of Medicine, Chapel Hill, NC.
Purpose: Terminal extensor tenotomy or Dolphin tenotomy, is a described treatment for the management of distal interphalangeal (DIP) joint hyperextension in chronic boutonniere deformity. The purpose of this study was to investigate the effects of incremental partial Dolphin tenotomy in correcting boutonniere deformity, with a focus on evaluating the improvement in DIP joint hyperextension deformity and documenting the development of iatrogenic mallet finger.
Methods: Thirty-eight fingers from 10 cadaveric hands were used.
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