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 82 for “"Rotational motion"”.
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Rotational motion and organization studies of cell membrane proteins
… in the cell membrane bilayer. Both lateral and rotational diffusion of membrane receptors reflects different kinds of intermolecular interactions within the plasma membrane environment. Understanding protein diffusion within the membrane is very important to further understanding biomolecular …
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Ros-Drill Automation: Visual Feedback Control And Rotational Motion Tracking
… recent procedure called Ros-Drill<sup>©</sup> (rotationally oscillating drill), of which the early versions have already been effectively utilized for the mice. In the first part, we present a procedure to automate a critical part of the operation: <em>initiation of the rotational …
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Ground-based ISAR imaging of cooperative and non-cooperative sea vessels with 3-D rotational motion
… vessels is a challenging task because the 3-D rotational motion of such vessels often gives rise to blurring. Blurry ISAR images are not desirable because they lead to inaccurate parameter estimation, which reduces the probability of correct classification. The objective of this thesis is to …
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Translation and rotational motion compensation techniques for Inverse Synthetic Aperture Radar (ISAR) Imaging of sea vessels
This dissertation covers range alignment, autofocus, and time window length optimisation for ISAR imaging of sea vessels. The rationale behind the study was to review the range alignment, autofocus, and time window length optimisation techniques found in the literature and to assess the strengths …
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Design modeling and fabrication of experimental apparatus for compliant mechanism education kit
… flexures. The first flexure is a linear motion flexure, which is a familiar design to practicing precision engineers. The second design is a flexure which moves in a screw motion, which has never been built before. The design of the screw flexure uses the FACT method to combine …
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Dynamics of an unbalanced ring spinning on a rough horizontal surface
… tops and gyroscopes, is observable in the motion of an unbalanced ring spinning on a rough horizontal surface. An analytical and numerical study is performed to investigate the general motion of an unbalanced ring modeled as a thin ring with a particle attached to its rim. The translational …
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High Resolution ISAR Imaging using a low-cost ultrasonic radar
… is a challenging task that requires advanced motion compensation algorithms to eliminate the blurring induced by the target's motion. However, the high cost of investigating different ISAR algorithms using real-life radars presents a significant challenge. To overcome this challenge, low-cost …
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Analysis, design and implementation of front-end reconfigurable antenna systems (FERAS)
… in the physical structure of the antenna via a rotational motion. In this work a new photoconductive switch is designed with a new light delivery technique. This switch is incorporated into new optically pumped reconfigurable antenna systems (OPRAS). The implementation of these antenna systems …
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Dynamics of biological macromolecules investigated by fluorescence depolarization
… for analyzing data from depolarization due to rotational motion have been largely based on the diffusion equation. It has been implicitly stated that a ""jump"" model should give the same result for the anisotropy decay as the diffusion equation. In this work, we derive the general result from …
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Dynamics of biological macromolecules investigated by fluorescence depolarization
… for analyzing data from depolarization due to rotational motion have been largely based on the diffusion equation. It has been implicitly stated that a ""jump"" model should give the same result for the anisotropy decay as the diffusion equation. In this work, we derive the general result from …
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Neutron diffraction and quasielastic neutron scattering studies of films of N-alkanes and a branched alkane adsorbed on graphite
… that the heptane layers exhibited both a slow motion dominating at low wave vector transfer Q and a faster motion dominating at higher wave vector transfer Q. The slow motion within the heptane layers at all coverages is similar to that measured for the n-dotriacontane monolayer alone. The …
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X -Ray Diffraction Rotational Microrheology
Rotational single particle tracking microrheology can be used to find the storage and dissipative behavior of viscoelastic fluids of much higher viscosity than translational single particle tracking. The technique of X-ray diffraction rotational tracking has the ability to track the rotational …
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Exploring the Effects of Rotation on Time-to-Contact Estimates in a Prediction-Motion Task
… or object properties in a given situation. Rotational motion reflects changes in local motion signals that have been known to affect global motion processing. In this study, we examined the effects of rotational motion on time-to-contact (TTC) estimates for a horizontally translating object …
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Multinuclear NMR studies of zeolites and heme-proteins
… of ways in NMR spectroscopy. In solids, where motions are highly restricted, the quadrupolar interaction is anisotropic and orientation dependent. The static and time dependent parts of the quadrupolar interaction play different roles in the nuclear magnetic resonance experiment. The static …
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Surface hardness classification via unmanned aerial vehicles gripper finger deflection
… that uses a rotary component to convert the rotational motion of a servo to the linear motion of the finger assemblies. We functionally test a gripper prototype made from rapid-prototype material. We conduct three experiments to test the gripper's functionality. The first experiment tests the …
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Digital Video Stabilization with Inertial Fusion
… inertial fusion with a Kalman filter. The camera motion is derived visually by tracking SIFT features in the video feed and fitting them to an affine model. The digital motion is fused with a 3 axis rotational motion measured by an inertial measurement unit (IMU) rigidly attached to the camera. …
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Design and analysis of hydraulically driven actuation system For a parabolic solar trough
… full range stroke in order to deliver +/-110° rotational requirement. The rotational motion is achieved through a pulley and a wire rope system, actuated by a single, double action double rod cylinder. As this project funding was received from our sole sponsor, an Italian multinational energy …
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Coupled Attitude And Orbital Control System Using Spacecraft Simulators
Translational and rotational motion are coupled for spacecraft performing formation flying missions. This motion is coupled because orbital control is dependent on the spacecraft attitude for vectored thrust. Formation flying spacecraft have a limited mass and volume for propulsion systems. We want …
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Neutron scattering studies and simulations of hydrogen adsorption in single-walled carbon nanotubes
… about the Qdependence of the J = 0 to J = 1 rotational transition of the hydrogen molecule when adsorbed on the nanotubes. Information about the potential felt by themolecule in the adsorption sites can be extracted by comparing the spectrum ofthe free hydrogen molecule to the spectrum …
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Internal Excitations of Stored Triatomic Hydrogen Molecular Ions
… DR measurements, given that the vibrational and rotational motion of the molecular ions can be controlled. Measurements using two different experimental approaches are presented, which were used to monitor H3+ internal excitations at the ion storage ring TSR of the Max-Planck-Institut fuer …
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