Akademisk avhandling--Filosofie--Uppsala, 1993. / Résumé en anglais.

Treatise (D.M.A.)--University of Texas at Austin, 2008. / Vita. Includes bibliographical references.

Treatise (D.M.A.)--University of Texas at Austin, 2008. / Vita. Includes bibliographical references.

Treatise (D.M.A.)--University of Texas at Austin, 2008. / Vita. Includes bibliographical references.

abstract: The purpose of this project is to introduce Bryan Johanson's composition for two guitars, 13 Ways of Looking at 12 Strings, and present an authoritative recording appropriate for publishing. This fifty-minute piece represents a fascinating suite in thirteen movements. The author of this project performed both guitar parts, recorded them separately in a music studio, then mixed them together into one recording. This document focuses on the critical investigation and description of the piece with a brief theoretical analysis, a discussion of performance difficulties, and guitar preparation. The composer approved the use and the scope of this project. Bryan Johanson is one of the leading contemporary composers for the guitar today. 13 Ways of Looking at 12 Strings is a unique guitar dictionary that takes us from Bach to Hendrix and highlights the unique capabilities of the instrument. It utilizes encoded messages, glass slides, metal mutes, explosive "riffs," rhythmic propulsion, improvisation, percussion, fugual writing, and much more. It has a great potential to make the classical guitar attractive to wider audiences, not limited only to guitarists and musicians. The main resources employed in researching this document are existing recordings of Johanson's other compositions and documentation of his personal views and ideas. This written document uses the composer's prolific and eclectic compositional output in order to draw conclusions and trace motifs. This project is a significant and original contribution in expanding the guitar's repertoire, and it uniquely contributes to bringing forth a significant piece of music. / Dissertation/Thesis / Recording of movement 1: Toccataesque mp3 / Recording of movement 2: Bad Egg Cafe mp3 / Recording of movement 6: Strings Etouffee mp3 / Recording of movement 7: Steel Pans mp3 / Recording of movement 8: Slide Rule mp3 / Recording of movement 10: EGAD! mp3 / Recording of movement 13: Jammus Vulgaris mp3 / D.M.A. Music 2011

This treatise focuses on four classical guitarist-composers who found their “American voices” and played key roles in the creation of a distinctive sound in contemporary American classical guitar music: Andrew York (b. 1958), Benjamin Verdery (b. 1955), Bryan Johanson (b. 1951), and David Leisner (b. 1953). Their work illuminates the quintessentially “American” guitar vocabulary that has become a common vernacular in American classical musical culture. These American guitarist-composers stand out in their generation for several reasons. First, each has found an instantly recognizable voice in performance and composition by forging meaningful bonds between the popular musical idioms of his American cultural background and the classical tradition. Second, each is recognized as a prolific composer in what this treatise dubs the “American classical guitar vernacular.” Third, their music represents the broad spectrum of stylistic approaches to this vernacular. Leisner and Johanson are closer to the art music (classical) end, while York and Verdery provide a more direct link to popular styles. Fourth, their personal success stories have legitimized the American classical guitar vernacular in classical composition and encouraged the development of similar styles within the broader international classical guitar community. The purpose of this study is two-fold. First, it examines the process by which American guitarists “find an American voice” within a chosen stylistic dialect. Second, it defines the specific musical vocabulary -- technical, interpretive, and aesthetic -- of the American guitar vernacular and studies the way it is integrated within the parameters of the classical style. To do so, it examines the lives and works of players who were among the first to embark on such a process within their professional community, setting their artistic perspectives within the broader context of American guitar culture. In a broader sense, this study explores how our relationships, collaborations, and perspectives as players both reflect the American experience and shape our national sound on the guitar. / text

Roll compaction is a continuous process commonly used in the pharmaceutical industry for dry granulation of moisture and heat sensitive powder blends. It is intended to increase bulk density and improve flowability. Roll compaction is a complex process that depends on many factors, such as feed powder properties, processing conditions and system layout. Some of the variability in the process remains unexplained. Accordingly, modeling tools are needed to understand the properties and the interrelations between raw materials, process parameters and the quality of the product. It is important to look at the whole manufacturing chain from raw materials to tablet properties. The main objective of this thesis was to investigate the impact of raw materials, process parameters and system design variations on the quality of intermediate and final roll compaction products, as well as their interrelations. In order to do so, we have conducted a series of systematic experimental studies and utilized chemometric tools, such as design of experiments, latent variable models (i.e. PCA, OPLS and O2PLS) as well as mechanistic models based on the rolling theory of granular solids developed by Johanson (1965). More specifically, we have developed a modeling approach to elucidate the influence of different brittle filler qualities of mannitol and dicalcium phosphate and their physical properties (i.e. flowability, particle size and compactability) on intermediate and final product quality. This approach allows the possibility of introducing new fillers without additional experiments, provided that they are within the previously mapped design space. Additionally, this approach is generic and could be extended beyond fillers. Furthermore, in contrast to many other materials, the results revealed that some qualities of the investigated fillers demonstrated improved compactability following roll compaction. In one study, we identified the design space for a roll compaction process using a risk-based approach. The influence of process parameters (i.e. roll force, roll speed, roll gap and milling screen size) on different ribbon, granule and tablet properties was evaluated. In another study, we demonstrated the significant added value of the combination of near-infrared chemical imaging, texture analysis and multivariate methods in the quality assessment of the intermediate and final roll compaction products. Finally, we have also studied the roll compaction of an intermediate drug load formulation at different scales and using roll compactors with different feed screw mechanisms (i.e. horizontal and vertical). The horizontal feed screw roll compactor was also equipped with an instrumented roll technology allowing the measurement of normal stress on ribbon. Ribbon porosity was primarily found to be a function of normal stress, exhibiting a quadratic relationship. A similar quadratic relationship was also observed between roll force and ribbon porosity of the vertically fed roll compactor. A combination of design of experiments, latent variable and mechanistic models led to a better understanding of the critical process parameters and showed that scale up/transfer between equipment is feasible.