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Encomium celebrates the life and contribution of Pianist and Master Teacher Jane Allen Ritter. She is mine and so many other’s musical mother. / text

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The motivation of this thesis is to look for a signature of Lorentz violation, hopefully observable, in the gravitational waves emitted by cosmic strings. Aspects of cosmic strings are reviewed, in particular how focused bursts of gravitational radiation are emitted when a cusp forms on the string. The same phenomenon is then studied in an effective field theory with Lorentz violation called Einstein-aether theory. This is a simple theory with a dynamic preferred frame, but it retains rotational and diffeomorphism invariance. The linearized version of the theory produces five wave modes. We study the usual transverse traceless modes which now have a wave speed that can be lower or greater than the speed of light. This altered speed produces distinctive features in the waves. They depend on two free parameters: roughly the wave speed and the acceleration of the string cusp. The profile of the wave is analyzed in detail for different values of the parameters and explained by close comparison with the string motion.

The motivation of this thesis is to look for a signature of Lorentz violation, hopefully observable, in the gravitational waves emitted by cosmic strings. Aspects of cosmic strings are reviewed, in particular how focused bursts of gravitational radiation are emitted when a cusp forms on the string. The same phenomenon is then studied in an effective field theory with Lorentz violation called Einstein-aether theory. This is a simple theory with a dynamic preferred frame, but it retains rotational and diffeomorphism invariance. The linearized version of the theory produces five wave modes. We study the usual transverse traceless modes which now have a wave speed that can be lower or greater than the speed of light. This altered speed produces distinctive features in the waves. They depend on two free parameters: roughly the wave speed and the acceleration of the string cusp. The profile of the wave is analyzed in detail for different values of the parameters and explained by close comparison with the string motion.

The purpose of this study was to examine conductors’ behavior and use of rehearsal time in high school and collegiate orchestra rehearsals. In this study, eight conductors (high school, n = 4, college, n = 4) were video recorded leading two ninety-minute orchestral rehearsals. After the data were collected, the videos were analyzed to compare the conducting behaviors used in each rehearsal. The percentage of time and rate in which conductors engaged in twelve conducting behaviors were calculated. Results indicated that both collegiate and high school conductors spend the most time giving nonverbal directives and verbal directives and engaged in nonmusical behaviors. The results also indicated a pattern of individual variability among the high school conductors and consistency among the collegiate conductors.

Thesis (D.M.A)--Boston University.