Objective: The myokinetic control interface for limb protheses involves implanting small permanent magnets in the residual muscles of the stump, retrieving their displacement induced by muscle contraction using extern...
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Background: Cuff electrodes target various nerves throughout the body, providing neuromodulation therapies for motor, sensory, or autonomic disorders. However, when using standard, thick silicone cuffs, fabricated in ...
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Targeted therapies allow increasing the efficacy of treatments for several diseases, including cancer. The release of drugs or chemicals directly in the site of interest will be beneficial for maximizing the therapy a...
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The compensation of target motion is crucial to perform medical tasks, such as localized therapy delivery. For example, abdominal organs can periodically move up to few centimeters in a couple of seconds due to respir...
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Hand injuries have a considerable impact on daily life, requiring extensive rehabilitation efforts in both clinical and home environments. Portable wearable devices show promise in addressing this need., rendering reh...
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Neural interfaces are bioelectronic devices capable of stimulating a population of neurons or nerve fascicles and recording electrical signals in a specific area. Despite their success in restoring sensory-motor funct...
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Animal action recognition is crucial for assessing animal well-being in agriculture and environmental monitoring. Recent advancements in this field rely on computer vision technologies. However, many current applicati...
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Wearable robots have been used for the rehabilitation and assistance of people with reduced hand mobility, such as stroke and spinal cord injury survivors. Most of these devices rely on hand kinematic information to c...
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ISBN:
(数字)9798350386523
ISBN:
(纸本)9798350386530
Wearable robots have been used for the rehabilitation and assistance of people with reduced hand mobility, such as stroke and spinal cord injury survivors. Most of these devices rely on hand kinematic information to close the control loops. However, the biomechanical complexity of the hand makes kinematics data acquisition and processing an open challenge. To tackle this, we present a method to identify the most informative joints of the hand with respect to hand global posture. We processed kinematics data belonging to two public databases, gathered during the execution of grasping tasks of activities of daily living (ADLs). To carry the analysis, we employed principal component analysis (PCA), standard deviation (SD), and covariance matrix (CvM). Our results suggest that flexion/extension motions of the metacarpal joint of the ring finger bring the most informative content during grasping tasks, whilst abduction/adduction motions are the least relevant. The proposed method represents a simple yet powerful tool for the strategic identification of the most informative joints involved in grasping tasks, which can be used for minimizing the number of sensors and optimizing their placement in wearable hand robots, by generalizing the available information and reducing kinematic redundancy.
Nature and technology often adopt structures that can be described as tubular helical ***,the role and mechanisms of these structures remain *** this paper,we study the mechanical response under compression and extens...
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Nature and technology often adopt structures that can be described as tubular helical ***,the role and mechanisms of these structures remain *** this paper,we study the mechanical response under compression and extension of a tubular assembly composed of 8 helical Kirchholf rods,arranged in pairs with opposite chirality and connected by pin joints,both analytically and *** first focus on compression and find that,whereas a single helical rod would buckle,the rods of the assembly deform coherently as stable helical shapes wound around a common ***,we investigate the response of the assembly under different boundary conditions,highlighting the emergence of a central region where rods remain circular ***,we study the effects of different hypotheses on the elastic properties of rods,i.e.,stress-free rods when straight versus when circular helices,Kirchhoff’s rod model versus Sadowsky’s ribbon *** up,our findings highlight the key role of mutual interactions in generating a stable ensemble response that preserves the helical shape of the individual rods,as well as some interesting features,and they shed some light on the reasons why helical shapes in tubular assemblies are so common and persistent in nature and technology.
EEG-based brain-machine interfaces (BMIs) offer an intuitive approach for individuals with motor impairments to control prosthetic or rehabilitation devices. Decoding movement intentions plays a vital role in accurate...
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