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 17 of 17 for “"angle of rotation"”.
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Unsymmetrical large deflections of an annular plate
… von Karman equations for large deflections of thin plates have been presented for annular plates under certain axisymmetric/loading conditions, little work has been done with unsymmetrical large deflections. In this investigation a systematic mathematical iteration technique is used to …
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The effect of rotation on legibility of dot-matrix characters
… (clockwise or counterclockwise) and the angle of stimulus image rotation, and the target character's distance from the center of screen, which was also the center of rotation; the dependent variables were response time and response correctness. Significant effects were found in the angle …
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Design and optimization of a three-fingered robot hand
… The following thesis introduces the concept of a threefingered robot hand and its driving mechanism. The hand includes two fingers and a thumb. Using the concept of “an under actuated system”, each finger consists of three revolute joints which are driven by two actuators and tooth belt …
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Large Deflections of Helical Springs
The problem analyzed is that of a helical spring subjected to end couples and forces which produce large deflections of the spring. These deflections are such that the angle of rotation of one end of the spring centerline with respect to the other end of the spring centerline exceeds the range …
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Fingerprint testing protocols for optical sensors
Currently there is a variety of conflicting and contradictory testing protocols for biometric technologies. There is currently no biometrics testing standard, which allows vendors to skew their test results in their favor. The research discussed in this thesis aims to address these issues by …
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Distribution of Holonomy about Closed Geodesics on Compact Hyperbolic 3-Manifolds
<p>An important feature of compact hyperbolic 3-manifolds is their closed geodesics, which have both geometric and dynamical implications. These geodesics are parametrized by their length and holonomy, which describes the angle of rotation by parallel transport about the geodesic. First, we prove …
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Interface circuits for readout and control of a micro-hemispherical resonating gyroscope
… are inertial sensors that measure the rate or angle of rotation. One of the most promising technologies for reaching a high-performance MEMS gyroscope has been development of the micro-hemispherical shell resonator. (μHSR) This thesis presents the electronic control and read-out interface that …
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Perceptual and comparative analyses of a passive, linear, multiple degree-of-freedom skin stretch device for proprioceptive substitution
… that this device can provide multiple degree-of-freedom proprioceptive information about a myoelectric prosthetic hand during grasping. The device consists of three plastic contact pads that are adhered to the skin on the glabrous forearm and that are each attached by a wire to the …
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Theoretical and experimental studies of the ITER ECRH polarizer and rotator gratings
… Cyclotron Resonance Heating (ECRH) will be one of the major heating and current drive mechanisms for the ITER fusion experiment. A pair of reflection grating polarizers will be used in the ECRH high power microwave transmission lines to generate the required elliptically polarized microwave beam …
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Convective Flow Patterns of a Three Generation Bifurcation Model
… study the convective flow patterns of the human lung, a large scale symmetric model was built to model branching airways that air passes through during respiration. The model used in this experiment goes through three symmetrical 70¿¿ bifurcations before terminating at the model …
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Modelling the effect of recent stress history on the deformation of overconsolidated soils
The aim of the research was to study the behaviour of overconsolidated soils subjected to small changes of strain or stress appropriate to the investigation of ground movements around excavations, retaining walls or foundations, and to develop a constitutive soil model that can predict such …
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Fabrication and Characterization of Torsional Micro-Hinge Structures
… <p>Fabrication and Characterization of Torsional Micro-Hinge Structures</p> <p>Mike Marrujo </p> <p>There are many electronic devices that operate on the micrometer-scale such as Digital Micro-Mirror Devices (DMD). Micro actuators are a common type of DMD that employ a diaphragm …
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Development of Active Terahertz Modulators for use with Quantum Cascade Lasers and Near-Field Imaging of their Individual Resonators
This thesis describes the development of active terahertz modulators based on arrays of coupled resonators loaded with monolayer graphene. The structures affect the amplitude, phase, and polarisation of the transmitted and reflected radiation. These devices were simulated using finite element …
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Conformational studies of lithium phenyl stearate.
The structure and conformation of lithium phenyl stearate (and to a lesser extent, for comparative purposes, cadmium stearate) was investigated using Fourier transform infrared spectroscopy, and various modelling techniques. The infrared results for LiPS show that the aliphatic portion of the soap …
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Using far-field measurements for determining mixed-mode interactions at interfaces
… interface during fracture and adhesion. The goal of this work is to develop a direct method to extract mixed-mode TSRs using only the far-field measurements. The first topic of the dissertation deals with extracting mixed-mode TSRs based on a combination of global and local measurements including …
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The role of social cues in the involuntary attribution of intentionality.
Predicting the behavior of others is crucial in social interactions and requires sophisticated cognitive mechanisms with which to do so. In order to make a more informed prediction, it is necessary to integrate information about the mental state and intentions of the actor with the perception of …
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Smart Dampers Applied to Upper-Limb Rehabilitation Training Systems
… with an estimated annual incidence rate of 180, 125, 200, and 280 per 100,000 citizens in the USA, Europe, England, and Scotland, respectively.<br/><br/>Muscle strengthening through resistance training has been reported to have a positive effect on the recovery of normal physiological …