Thesis (Ph. D.)--University of Washington, 1989. / Vita. Includes bibliographical references (leaves [494]-504).

Thesis (doctoral)--Leiden, 1934.

Submitted by Cynthia Nascimento (cyngabe@ufba.br) on 2013-02-19T15:54:28Z No. of bitstreams: 1 Verônica de Souza Santos.pdf: 5464596 bytes, checksum: 9645c9bd8a65aea84051e54f89bb94e4 (MD5) / Approved for entry into archive by Fatima Cleômenis Botelho Maria (botelho@ufba.br) on 2013-02-19T16:20:59Z (GMT) No. of bitstreams: 1 Verônica de Souza Santos.pdf: 5464596 bytes, checksum: 9645c9bd8a65aea84051e54f89bb94e4 (MD5) / Made available in DSpace on 2013-02-19T16:20:59Z (GMT). No. of bitstreams: 1 Verônica de Souza Santos.pdf: 5464596 bytes, checksum: 9645c9bd8a65aea84051e54f89bb94e4 (MD5) / Este estudo apresenta duas edições, uma semi-paleográfica e outra diplomática de 33 histórias de vida das santas mulheres presentes no Flos Sanctorum em Lingoajẽ Portugues e um estudo lingüístico sintático acerca dos fronteamentos de constituintes e interpolação com base nos dados extraídos dessas histórias. Compara os dados do corpus analisado com os dados de estudos realizados por outros autores, de modo a entender a) se eles dão indícios para caracterizar o documento como inovador ou conservador em relação ao português arcaico e ao clássico; b) se os resultados de pesquisa atestados nas histórias das santas se aproximam dos resultados já apresentados em estudos de outros autores; c) qual o tipo de constituinte mais fronteado e/ou interpolado: complementos ou adjuntos. A análise vai indicar que o corpus se caracteriza como um documento em transição, apresentando características tanto conservadoras quanto inovadoras em relação ao português antigo, tendo, apesar da diversidade de constituintes complemento fronteados e/ou interpolados, um número maior de elementos de tipo adjunto fronteado e/ou interpolado. / Universidade Federal da Bahia. Instituto de letras. Salvador-Ba, 2011.

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The chansonnier held by the Biblioteca Casanatense in Rome, designated Codex 2856 (0. V. 208), is a handsome volume containing 123 polyphonic compositions in the style of the Franco-Flemish School, circa 1450 to 1400. Although no text beyond the incipit is found in the manuscript, the value of the source is enhanced by the names of the composers of 106 of the compositions. Volume one focuses on the manuscript, giving a physical description of the manuscript, recounting the history of the manuscript, and includes discussion of selected composers and a concordance. Volume two contains the music of the chansonnier Biblioteca casanatense 2856.

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Semiclassical initial value representations (SC-IVRs) are popular methods for an approximate description of the quantum dynamics of atomic and molecular systems. A very efficient special case is the propagator by Herman and Kluk, which will be the basis for the investigations in this work. It consists of a phase space integration over initial conditions of classical trajectories which are guiding Gaussian wavepackets. A complex phase factor in the integrand allows for interference between different trajectories, which leads to soft quantum effects being naturally included in the description. The underlying classical trajectories allow for an approximate description of the dynamics of large quantum systems that are inaccessible for a full quantum propagation. Moreover, they also provide an intuitive understanding of quantum phenomena in terms of classical dynamics. The main focus of this work is on further approximations to Herman-Kluk propagation whose applicability to complex dynamics is limited by the number of trajectories that are needed for numerical convergence of the phase space integration. The central idea for these approximations is the semiclassical hybrid formalism which utilizes the costly Herman-Kluk propagator only for a small number of system degrees of freedom (DOFs). The remaining environmental DOFs are treated on the level of Heller's thawed Gaussian wavepacket dynamics, a single trajectory method which is exact only for at most harmonic potentials. If the environmental DOFs are weakly coupled and therefore close to their potential minimum, this level of accuracy is sufficient to account for their effect on the system. Thus, the hybrid approximation efficiently combines accuracy and low numerical cost. As a central theoretical result, we apply this hybrid idea to a time-averaging scheme to arrive at a method for the calculation of vibrational spectra of molecules that is both accurate and efficient. This time-averaged hybrid propagation is then used to study the vibrational dynamics of an iodine-like Morse oscillator bilinearly coupled to a Caldeira-Leggett bath of harmonic oscillators. We first validate the method by comparing it to full quantum and Herman-Kluk propagation for appropriately sized environments. After having established its accuracy, we include more bath DOFs to investigate the influence of the Caldeira-Leggett counter term on the shift of the vibrational levels of the Morse oscillator. As a result, we find out that a redshift, which is observed experimentally for, e.g., iodine in a rare gas matrix, occurs only if the counter term is not included in the Hamiltonian. We then move away from the model bath and on to a realistic, experimentally relevant environment consisting of krypton atoms. We put the iodine molecule into a cluster of 17 krypton atoms and investigate the loss of coherence of the iodine vibration upon coupling to just a few normal coordinates of the bath. These modes with the same symmetry as the iodine vibration turn out to be sufficient to reproduce the expected qualitative dependence on bath temperature and initial state of the iodine molecule. With these few normal modes, a full quantum calculation yields values for coherence loss rates that are close to experimental results. Furthermore, a comparison to semiclassical calculations with more bath modes included confirms the importance of the few highly symmetric normal coordinates. Then, we apply the time-averaged hybrid formalism once more to calculate the vibrational spectrum of the iodine molecule in this now anharmonic krypton environment. Using a krypton matrix instead of a cluster geometry, we find the correct qualitative and also quite good quantitative agreement for the shift of the iodine potential. Finally, we will investigate a more fundamental question, namely, if SC-IVRs contain the spin effects due to the Pauli exclusion principle. To this end, we apply a number of SC-IVRs to the scattering of two electrons with initial states corresponding to either parallel or antiparallel spin. We compare the outcome to full quantum results and find that the difference is resolved by those methods that comprise multiple interfering trajectories.

Eine der beliebtesten Schmuckformen in der deutschen Buchmalerei sind die Feldinitialen mit „Akanthusrankenausläufern“. Das sind so genannte Initialbuchstaben, die mit floralen Ornamenten, meistens Blattformen oder Ranken, versehen sind. Neben dieser Ausführung winden sich von den Buchstaben oder Initialfeldern Ranken hinweg, welche sich über die Ränder der Seiten oder zwischen den Schriftspalten entlang ziehen. Diese sind dann häufig mit weiteren floralen und vor allem bildlichen Motiven besetzt, wie zum Beispiel mit Blüten, Vögeln oder menschlichen Figuren.

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