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.
Results
Showing 1 to 20 of 2607 for “"angles"”.
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Femoral angles and their correlates
… behaviors among populations. Together, these angles significantly influence the load distribution along the long axis of the bone, affecting our interpretations of mobility patterns among past populations. Certain gait-related disorders may leave osteological signatures in the angulation of …
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Accurate frequency estimation with phasor angles
… least error square approximation on the phasor angles of the input waveform. Then, a resampling based on the rough frequency estimation is carried out, followed by another second order least error square approximation to obtain the final results. The results of simulations using this approach …
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Determining Optimal Halftone Angles for CMYK Printing
… prints are all around us, yet the halftone angles used to generate these prints are traditionally set to specific values without substantial documentation explaining why these angles are optimal. Investigating the optimization of these angles is important for enhancing print quality and …
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Autonomous orbital rendezvous using angles-only navigation
… must be accomplished through the use of angles-only measurements by developing various relative motion orbital trajectories. Chaser vehicle maneuvers designed to enhance the estimator's observability of the downrange distance to the target are considered. The target vehicle is assumed to …
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Spherical Angles: The Practical Pursuit of Stylistic Freedom
Journalism, screenplay, and professional writing.
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Dynamic Contact Angles And Wetting Front Instability In Soils
… in porous media. To study those dynamic contact angles when gravity effects are present, rectangular capillary tubes are used to facilitate the observation of the complete interface without geometric distortion. Results show that if the dynamic contact angle minus the static contact angle is …
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Feasibility of open web rafters constructed of single angles
… reported here was to determine if single angles can be used for chord and web members in lightweight steel open web rafters, and if so to determine what effect the single angles have on the design of the rafter's members. A computer model was constructed to determine the effects of a …
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Spacecraft Trajectory Planning for Optimal Observability using Angles-Only Navigation
<p>This work leverages existing techniques in angles-only navigation to develop optimal range observability maneuvers and trajectory planning methods for spacecraft under constrained relative motion. The resulting contribution is a guidance method for impulsive rendezvous and proximity operations …
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Anomalous Reflection from Phase Gradient Metasurfaces for Arbitrary Incident Angles
… restricted to perpendicular incidence or small angles close to the normal vector. The reflected wave directions from PGMs are determined in the literature by utilising the generalised Snell’s law of reflection. This method is restricted by the relationship of the incident angle and phase …
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Formation of branching angles at bifurcations of ant trail networks
… back towards the nest. The mean bifurcation angles have been found to be 50 - 80 for networks radiating out from the nest. This thesis focuses on the formation of the bifurcation angles and devising a model to illustrate their formation. It has been hypothesized that if the [theta] is small, …
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“Angles of Approaching Gender Equality: Top-Down vs. Bottom-Up”
<p>The international community has attempted to integrate and implement norms into their domestic structure for many decades. They have incorporated the norm of gender equality through many different measures, however failed to identify a successful approach to implementing this type of norm …
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Understanding nanomagnetism from all angles: Developments in magnetic electron tomography
This thesis aims to develop transmission electron microscopy (TEM) techniques to study magnetic nanomaterials in three dimensions (3D). At the nanoscale, magnetic materials exhibit various intriguing behaviours such as topological protection in skyrmions (which may be used in next-generation …
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Day-night and energy variations for maximal neutrino mixing angles
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.
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Angles-only navigation technique for maneuver-free spacecraft proximity operations
The technique of angles-only navigation consists of a single surveyor making line-of-sight observations of a target to deduce a relative navigation state from a sequence of angle measurements. Historically, angles-only navigation has been impeded by a range ambiguity problem in its many …
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Estimation of Air Flow Angles Derived from an Inertial Navigation System
… a primary method for measuring aircraft air flow angles in flight testing. The traditional methods used to measure air flow angles consist of sensors external to the aircraft, such as an air data boom or an angle of attack probe. The advantage of using INS to measure air flow angles would be in …
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Reflection of seismic waves at oblique angles from deep sea sediments
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1964.
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Methods for the direct simulation of nanoscale film breakup and contact angles
… a numerical method for the simulation of contact angles as well.
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EEG subspace analysis and classification using principal angles for brain-computer interfaces
… in other domains is the use of principal angles between subspaces, which has been applied mostly to video sequences. This dissertation studies and examines different ideas using principal angles and subspaces concepts. It introduces a novel mathematical approach for comparing sets of EEG …
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