Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"Force-sensitive"”.
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Evaluation of Textile Force-Sensitive Resistors in Quantifying Athletic Shoe Fit
… expected inverse relationship between applied force and resistivity and had an adequate range and temporal precision for testing shoe fit. The results indicate that sensors made of Amradield Stretch performed better in accuracy and precision. There was no significant difference in sensor …
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The Role of Force-Sensitive Interactions in Amyloid Assembly by Fungal Adhesins
… T domains prior to amyloid assembly, and shear force-induced partial unfolding of the Als protein is required to expose its AFR, allowing amyloid formation to proceed. We investigated this putative mechanism by examining the relationship between the stability of AFR-concealing intramolecular …
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Design and modeling of a force sensitive toothbrush by using a buckling truss structure
Excessive force applied to teeth with a toothbrush during brushing may cause tooth erosion and gum recession. There have been many attempts by others to mitigate this effect with a force-sensitive toothbrush that can alert a user when excessive force is applied. However, many of the prior art …
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A modular fingertip design for normal force feedback control of a 3-fingered dextrous robotic hand
… hand mechanics over the past decade, fingertip force remains predominantly controlled by flexor cable tension and joint position. A modular fingertip normal force sensor is developed here from basic semiconducting elastomer devices. Construction techniques are defined to shape standard Interlink …
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Aware surfaces : large-scale, surface-based sensing for new modes of data collection, analysis, and human interaction
… each sensor module is 0.3m x 2m, contains 512 force sensitive resistors, and has a refresh rate of about 8Hz. Each module was made with conductive inkjet printing and PCB fabrication, creating a low-profile sensing surface with robust signal-collecting circuitry. Several experiments were …
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Mechanochemical activation at solid interfaces
… chemistry changes resulting from activation of force-sensitive mechanophore modified interfaces remains largely unexplored. In this dissertation, two different functionalization approaches to molecularly tailor interfacial changes are investigated. First, the influence of SAM tail group …
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Development of a Generalizable Assay for Probing the Effects of Mechanical Force on the Function of Fluorescent Proteins within Molecular Tension Sensors
… mechanical signals is often mediated through force-dependent changes in protein structure and function through a poorly understood process known as mechanotransduction. Towards elucidating the molecular processes underlying mechanosensitive regulation, molecular tension sensors (MTSs) have …
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Design and development of portable home based rehabilitation device
… time monitoring of the patient's motions and forces and without the ability for real time adjustments of the applied forces and motions. Improved technology has allowed for advancements where these devices can be designed to apply a form of tension to resist motion of the joint. The related …
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Hybrid inkjet and direct-write multi-material additive manufacturing
… for example electrical conductivity or force sensitive resistivity. Models for the extrudate flow rate are used alongside experimental determination of the extrudate cross-section to ensure accurate process congruence. Finally, printed results demonstrate the various printing techniques, …
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A Platform for Analyzing Force Sensitivity and Multivalency in Actin Networks
… specific functional architectures. Mechanical force has been shown to modulate the interactions between several ABPs and individual actin filaments, but it is unclear how this phenomenon contributes to the emergent force-responsive functional dynamics of actin networks. In this thesis, I first …
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On the performance of base-isolated buildings: a generic model
… Finally, the development of a prototype force-sensitive vibration isolation bearing is described as a contribution to verifying base-isolation theory with experiments.
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Mesenchymal Stem Cell Mechanobiology and Tendon Regeneration
… via a complex set of behaviors involving force-sensitive membrane receptor activity, changes in cytoskeletal contractility and transcriptional regulation. Effective ex vivo model systems are needed to emulate the native environment of a tissue and to translate cell-matrix forces with high …
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Epidermal growth factor receptor is an essential component in E-cadherin force-transduction complexes
… E-cadherin has been shown to actively respond to force to reinforce junction stability. However, classical E-cadherin mechanotransduction lacks sufficient information for force-induced biochemical signaling. In this dissertation, I focus on the role of E-cadherin/EGFR complexes in mediating …
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Multi-Modal Regualtion of Actin Networks
… composition of actin networks are modulated by force, it is still unclear how interactions between actin filaments and associated proteins are mechanically regulated. Force-sensitive actin binding interactions are fundamental for cells to sense and respond to mechanical stimuli by converting …
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Light Stimulation of Sensory Hair Cells
… mechanosensitivity arises from direct gating of force-sensitive ion channels by the tension in tip links located at the tops of the stereocilia. The study of hair cells and their mechanically gated channels has heretofore required physical displacement of a hair bundle to open its …
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Sensor Fusion based Gait Recognition for Accurate Actuation of Foot Drop Stimulation
… used for gait and activity information relies on force sensitive resistors (FSRs) for plantar foot pressure; accelerometers for foot acceleration and velocities; and gyroscopes for foot angular motion. A stimulation control algorithm is further developed that determines when to actuate stimulation …
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A Study Exploring the Use of Artificial Ligaments to Enhance the Human-Robot Interface Via Force Distribution Manipulation in Biomimetic Cuff Systems
… assistive devices. A testing rig that allows force tracking at different angles has also been created as part of this thesis. The device features 2 pairs of cuffs; one that's placed above the knee and another that's placed below the knee. Each pair of cuffs comes equipped with a BOA lacing …
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Design of actuation system and minimization of sensor configuration for gait event detection for Gen 3.0 Portable Powered Ankle-Foot Orthosis (PPAFO)
… AFO. A total of five sensors were selected (two force sensitive sensors, one ankle angle sensor, and two inertial measurement units (IMU)). The performances of selected sensor configurations were quantified and compared through state-based and event-based approaches in terms of gait state …
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Spiropyrans as color-generating mechanophores
… tunneling microscopes or single molecule force experiments using atomic force microscopy or optical tweezers are recent developments. However, these methods are limited in their usefulness by the small number of molecules that can be affected at any one time. Combining these two concepts …
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Mechanical and optical characterization of force induced chemical reactions in solid state linear polymers
… chemical, or electrical potential. By linking force-sensitive chemical species (mechanophores) into polymer backbones, mechanical force can drive chemical reactions. Mechanophores have been developed with potential as damage sensing, self-healing, and self-reinforcing materials. This research …
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