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 1174 for “"Degrees of Freedom"”.
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Octupole degrees of freedom in Uranium-230
… transitions. From a study about the implications of tetrahedral shapein230U and232U [7], it was discovered that these bands were better described as octupole vibrations.This was concluded from the observation of the in-band E2 transitions from the negative-paritybands which contradicted the idea …
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Maximizing degrees of freedom in wireless networks
… reaches the destination through a sequence of layers of single-antenna relays. A non-separation-based strategy is proposed and shown to achieve a rate equal to the capacity of a point-to-point multiantenna system in the high SNR regime. This implies that lack of coordination between relay …
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Nonlinear Torsional Vibration in Two Degrees of Freedom
… in DSpace on 2014-12-05T19:15:49Z (GMT). No. of bitstreams: 1 0003999.pdf: 2272215 bytes, checksum: f077d765eb0a3776160f4c825923f800 (MD5) Previous issue date: 1952
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Teleoperator tracking performance in six degrees of freedom
Thesis (Mech. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
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Estimation of Rotational Degrees of Freedom Using Spline Functions
Structural Dynamics Modification work often requires the inclusion of rational degrees of freedom in the modal data. These are not usually directly measurable because suitable transducers are not yet readily available. This work investigates the estimation of rotations from computed or measured …
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Estimation of Rotational Degrees of Freedom Using Spline Functions
Structural Dynamics Modification work often requires the inclusion of rational degrees of freedom in the modal data. These are not usually directly measurable because suitable transducers are not yet readily available. This work investigates the estimation of rotations from computed or measured …
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Exotic Phenomena Emerging from Localized Multipolar Degrees of Freedom
The rich diversity of building blocks in condensed matter systems offers the opportunity for exotic macroscopic quantum phenomena. Multipolar moments, higher order generalizations of the familiar dipole, present a unique avenue for the discovery of a variety of exotic and novel phases of matter. …
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Precision six degrees of freedom magnetically-levitated photolithography stage
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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A kinematic coupling based 6 degrees of freedom dynamometer
A new 6-degree of freedom dynamometer is presented. Six load cells measure the normal forces at the contact points of a three groove kinematic coupling. Three toggle clamps are used to preload the machine, so that it does not come apart. The device was designed, analyzed, built and tested. The …
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Nonlinear resonances in systems having many degrees of freedom
An analysis is presented of the main, superharmonic, subharmonic, combination and internal resonances in a weakly nonlinear system having many degrees of freedom. The system has cubic nonlinearities, modal linear viscous damping and is subject to harmonic excitations. The method of multiple scales, …
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Statistically modelling tennis racket impacts with six degrees of freedom
… (ITF) is responsible for protecting the nature of tennis. The ITF uses computational models to predict how trends in equipment parameters could affect the games future. The current ball-racket impact model is limited to non-spinning, on-axis, normal ball impact simulations. The aim of this …
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A high precision three degrees of freedom friction drive stage
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.
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Six degrees of freedom estimation using monocular vision and moiré patterns
We present the vision-based estimation of the position and orientation of an object using a single camera relative to a novel target that incorporates the use of moire patterns. The objective is to acquire the six degree of freedom estimation that is essential for the operation of vehicles in close …
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Counting degrees of freedom in quantum field theory using entanglement entropy
We devote this thesis to the exploration of how to define the number of degrees of freedom in quantum field theory. Intuitively, the number of degrees of freedom should decrease along the renormalization group (RG) flow, and should be independent of the RG scale at a conformal fixed point. We argue …
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The BoPen : a tangible pointer tracked in six degrees of freedom
… optical system for freehand interactions in six degrees of freedom. A single camera captures a pen's location and orientation, including roll, tilt, x, y, and z by reading information encoded in a pattern at the infinite focal plane. The pattern design, server-side processing, and application …
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Design and analysis of the three degrees of freedom parallel kinematic machine
The thesis is about design and analysis of a PKM with 3 DOF. The new PKM is designed as a machine tool in various applications in manufacturing. The PKM is optimized based on the developed stiffness model. Kinematics and dynamics of the new PKM is also modeled and simulated.
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Local Magnetism in Strongly Correlated Electron Systems with Orbital Degrees of Freedom
The central aim of my research is to explain the connection between the macroscopic behavior and the microscopic physics of strongly correlated electron systems with orbital degrees of freedom through the use of effective models. My dissertation focuses on the sub-class of these materials where …
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Zero modes and degrees of freedom of topological solitons on the plane
… this thesis we analyse the coaxial multivortices of the Ginzburg-Landau, the Euclidean complex sine-Gordon-1 and -2 theories on the plane. More specifically, we determine the number of continuous free parameters describing the largest family of solutions, with these vortices as members. This is …
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