The UCNA Experiment at the Los Alamos Neutron Science Center (LANSCE) uses an electron spectrometer to observe angular correlations between the neutron spin and the momenta of β particles emitted during the process of β decay. These angular correlations give rise to an asymmetry determined by the ratio of two coupling constants, gA and gV . Combined with neutron lifetime measurements, these observations probe physics beyond the standard model through unitarity tests of the Cabbibo-Kobayashi-Maskawa Matrix. UCNA’s current spectrometer uses a multi-wire proportional chamber and a plastic scintillator coupled to four photomultiplier tubes (PMTs) by 2 meters of light guides to record energy, position, and time data. The UCNA Collaboration is exploring ways to modernize the detector package using silicon photomultipliers (SiPMs) to increase the sensitivity of the experiment. The new configuration of the spectrometer is expected to improve systematic uncertainties; namely the 2 meter path the produced light must travel to reach the PMTs and the SiPMs’ quantum efficiency being a factor of 2 greater than the prior PMTs’. The subject of this paper is a prototype detector for evaluating the SiPMs as the only detectors present, the goal being to compare the position and energy resolution with that of the current spectrometer in use at UCNA.

京都大学 / 0048 / 新制・課程博士 / 博士(理学) / 甲第18794号 / 理博第4052号 / 新制||理||1583(附属図書館) / 31745 / 京都大学大学院理学研究科物理学・宇宙物理学専攻 / (主査)教授 川合 光, 准教授 福間 將文, 教授 田中 貴浩 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DFAM

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A non-supersymmetric Yi-deformed AdS/CFT correspondence has recently been conjectured by Frolov. A detailed description of both sides of this proposed gauge/string duality is presented. The analogy that exists between single trace gauge theory operators in the SU(3) sector and i-deformed SU(3) integrable spin chains is also discussed. Frolov, Roiban and Tseytlin’s leading order comparison between the ideformed spin chain coherent state action and i-deformed string worldsheet action in the semiclassical limit is reviewed. A particular Lax pair representation for the first order semiclassical i-deformed spin chain/string action is then constructed.

Despite many scholars having explored Beethoven’s compositional rhythmic processes, no systematic study has been done in this regard for the sketches for String Quartet Op. 127, and any mention of rhythm in the current literature tends to be incidental. I combine the theories of Rothstein, Krebs and others, an approach that has been more effective in understanding the changes during the compositional process from metrical and hypermetrical perspectives. I examine how Beethoven’s rhythmic patterns add to both musical coherence and contrast. My thesis demonstrates that Beethoven’s starting point is usually a conventional 8- or 16-measure phrase; later, according to the sketches, he makes rhythmic adjustments, such as grouping dissonances, expansions, or displacements, using a variety of parameters. Also added later are rhythmic patterns that individualize each of the four instruments. These processes are found throughout the two movements studied. Therefore, rhythm and its manipulations are used as unifying features.

We investigate spherically-symmetric gravitational collapse in the presence of a single "large" extra dimension through the use of analytical and numerical techniques. This has bearing on higher-dimensional ideas concerning hypothetical objects called "black strings," or black holes extending into an extra circular dimension, which dimension we hereinafter label zeta. These putative objects were first seriously considered as elements of string theory but have relevance in simpler, higher-dimensional generalization of Einstein's general relativity. We assume a universe topologically consisting of a two-dimensional Lorentzian manifold crossed with the sphere, crossed again with the circle. We model the formation of a uniform black string via two modes—the collapse of a massless scalar field, and of pure gravitational waves consisting of (gaussian) distortions in the extra dimension. We report on and discuss two aspects of the nonlinear dynamics, viz., that in five dimensions larger-amplitude fields appear to collapse more slowly than their lower amplitude cousins; and that pure gravitational field collapse exhibits signs of self-similarity at the threshold between black string formation and dispersal of the collapsing field.

String Music is a composition for string orchestra, percussion, and tape in three movements. The work exploits both traditional and contemporary polyphonic techniques (e.g. imitation, inversion, canon, stretto, fugue, collage). In addition, each movement employs a different musical elementas the focus of organization (timbre, pitch, rhythm/meter). The duration of the entire work is approximately eighteen and a half minutes.

Given a symmetric Frobenius superalgebra A equipped with a compatible involution, we define the associated Frobenius Brauer category B(A) and affine Frobenius Brauer category AB(A), generalizing the plain Brauer category B and affine Brauer category AB. We define the orthosymplectic Lie superalgebra osp m|2n(A) and a functor from B(A) to osp m|2n(A)-mod, the category of supermodules over osp m|2n(A). We also define a functor from AB(A) to the endofunctor supercategory of osp m|2n(A)-mod.We prove that these two functors are well-defined and use the former functor to prove a basis result for B(A, δ), a specialized version of B(A). Prior to defining these categories and functors, we provide the background information on super-mathematics and Frobenius superalgebras needed to understand the new results.

Thesis (Ph.D.)--Boston University / The purpose of this study was to examine the life of Phyllis Young (b. 1925) and her contributions to string education. The researcher explored her ancestry, childhood, education, personal life, and career as a cellist and string pedagogue. The study is divided into a prologue, five chapters, and an epilogue, and ends with her retirement from the University of Texas String Project in 1993. Phyllis Young, a faculty member at the University of Texas at Austin from 1953- 2007, was Professor of Cello from 1974-2007 and the Parker C. Fielder Regents Professor in Music from 1991-2007. She authored two books, Playing the String Game (1978) and The String Play (1986), and served as national president of the American String Teachers Association. She received that organization's Distinguished Service Award (1984) and the Paul Rolland Lifetime Achievement Award (2002). In 2006, the American String Teachers Association established an award in her name, The Phyllis Young Outstanding Studio Teacher Award. For forty years (1953-1993) Young was associated with the University of Texas String Project, a teacher training program that continues to serve as a model for numerous string programs nation-wide. She was director of the project from 1965-93. Young has given lecture-demonstrations, master classes, and workshops for string teachers in thirtythree countries on six continents and in forty-four of the American states. Her success as a pedagogue is substantiated through her numerous students, many of whom occupy significant musical positions in universities and orchestras, and as leaders in the string education field. Phyllis Young is a dedicated, passionate teacher whose legacy rests not only on her professional accomplishments, but also on her influence on those who have been associated with her. The success of her students, her influence on other string teachers and programs, and her two books, all lasting testaments to her commitment to excellence, can be considered the most significant components of her legacy.

A musical score.