In the open ocean acoustic scattering by SONAR sources can be dominated by large fish schools. Multiple scattering effects are strong and the individual fish air-filled swimbladders scatter in the 1-10 kHz frequency range for most fish sizes. Furthermore, these schools are typically large in comparison to the acoustic wavelength and the individual fish typically swim in nearly periodic arrangements with a separation distance of approximately one body length. Hence, this work takes the perspective that fish schools can be studied simply and effectively by invoking the formalism of Bloch waves in periodic media. Analysis of the periodic school is aided through the Bloch theorem which reduces the study of the entire school to the study of a unit cell containing a single fish swimbladder. Application of the Bloch formalism to the school requires study of acoustic reflection from a semi-infinite half-space composed of an infinite tessellation of air-filled swimbladders in water. This media is denoted a fluid phononic crystal (PC). The reflection is considered, using a finite element discretization of the unit cell and an expansion of Bloch waves for the transmitted wave field. Next, scattering from a large finite school is studied through the context of the Helmholtz-Kirchhoff integral theorem where the semi-infinite PC pressure, determined by the Bloch wave expansion, is used as the surface pressure. Validation of results is accomplished via comparison with a finite element model (two dimensions) and a low frequency analytical multiple scattering model (three dimensions). Analysis of the dispersion relationship of the infinite PC yields useful information for a large school, namely, the frequency corresponding to target strength peaks, even as wave incidence angles and internal fish spacing are varied. The scattering effects attributed to the shape and weak internal disorder of the finite school were investigated with the surface integral method and a perturbation scheme. A general model using Bloch formalism, that encompasses the internal fish structure, fish biologic properties, and realistic school effects such as varying school geometry and disorder, was formulated. Transient analysis of the frequency dependent scattering, using the proposed approach developed in this thesis, may assist SONAR operators better classify large fish schools based on the observed characteristics of the scattered field.

In this Bachelor’s thesis the following question is answered: Does the inequality posed in the article Klyachko et al [2008] cover the real part of the Bloch surface of a 3D quantum system when used as in Kochen and Specker [1967]? The Klyachko inequality relies on using five measurements to show contextuality of a subset of states on the real part of the Bloch surface. These can now be used in several configurations as present in the Kochen-Specker contextuality proof, by simply rotating the measurements. We show here that these new inequalities will have subsets of violation that eventually cover the entire real part of the Bloch surface. This can be extended to show that all states of a spin 1 system are non-contextual, so that we have recovered a state-independent contextuality proof by using the Klyachko inequality several times. In the final part, an interpretation of this is given and also some recommendations for further research that should be done in the field.

This recital explores the solo viola literature of the 20th and 21st centuries. Pieces range in date from 1922 to 2005 and present the various styles and techniques of virtuoso viola playing developed in the modern era. The selection of pieces presented on this recital chronicles the viola���s journey to become a legitimate solo instrument in the 20th century. Works performed include: Cadenza per viola sola by Krzysztof Penderecki, Purple Rhapsody for Viola and Orchestra by Joan Tower, Suite for Viola Solo (Unfinished) by Ernest Bloch, Lamentations of Jeremiah for Viola Solo by Milton Barnes, and Sonata for Viola and Piano Op. 25 No. 4 by Paul Hindemith. Works by both male and female composers are presented, and a wide variety of compositional styles are represented, including works by Polish, American, Canadian, and German composers. <br>Works performed encompass three periods of the modern era: Hindemith - early 20th century, Bloch and Barnes - mid-20th century, Penderecki and Tower - present day. / Mary Pappert School of Music; / Music Performance / MM; / Recital;

The French historian Marc Bloch is considered to be one of the masters of medieval history, particularly his creation Feudal Society has been an essential piece of work for everyone who desires a deeper understanding of the general feudal society. Bloch gives his readers a vivid and living picture of a society so far beyond our present that it is sometimes hard to keep in mind that this society is part of our legacy. At the same time Bloch endows his readers with the special historical outlook he and his successors has developed, the history of the mentalities. By reaching further back in time, to the Roman and Germanic cultures and the manorial system, he proves his point that the feudal society was build on the legacy of older structures and institutions. In the coming study I will disentangle the early feudal structure of power as Bloch has described it in his Feudal Society. The essence of this power structure is to find in the very characteristic tie between two men, the vassalage. It is therefore the nature of vassalage, with the heavily armed horseman and the relations between the lord and his vassal, which is going to be of primary importance for my study. In my quest for the vassalage´s spirit, Bloch´s underlying structures mentioned above will play a vital part in the understanding of this power structure that dominated the feudal society. If the reader keep this in mind the study’s name, Feudalism as a Phenomenon – The Peculiar Power in the Early Feudal Society, becomes clear.

Projet professionnel personnel de bibliothécaire : gestion de projet : Bibliothéconomie : Villeurbanne, ENSSIB : 2003.

Akademisk avhandling för filosofie doktorsexamen--Stockholm--Universitet, 1992. / Contient un résumé en anglais. Bibliogr. p. 239-249.

Universiẗat, Diss., 1997 u.d.T.: Korol, Martin: Der Rückzug des deutschen Geistes aus der Politik zwischen 1916 und 1918--Bremen. / Gedr. Ausg. im Selbstverl. M. Korol, Bremen, Tartu.

Universiẗat, Diss., 2005--Bremen.

Dissertação (mestrado)–Universidade de Brasília, Faculdade UnB de Planaltina, Programa de Pós-Graduação em Ciência de Materiais, 2017. / Submitted by Raquel Almeida (raquel.df13@gmail.com) on 2017-12-18T18:00:53Z No. of bitstreams: 1 2017_GersonFerreiraRocha.pdf: 698883 bytes, checksum: 3e7896258815ef5dc3d7bb165e01051b (MD5) / Approved for entry into archive by Raquel Viana (raquelviana@bce.unb.br) on 2018-02-21T14:32:38Z (GMT) No. of bitstreams: 1 2017_GersonFerreiraRocha.pdf: 698883 bytes, checksum: 3e7896258815ef5dc3d7bb165e01051b (MD5) / Made available in DSpace on 2018-02-21T14:32:38Z (GMT). No. of bitstreams: 1 2017_GersonFerreiraRocha.pdf: 698883 bytes, checksum: 3e7896258815ef5dc3d7bb165e01051b (MD5) Previous issue date: 2018-02-20 / Neste trabalho foi analisado a dinâmica de um pacote de onda eletrônico em uma rede cristalina unidimensional sob a influência de campo elétrico externo DC/AC e, para tanto, foi utilizado o modelo Tight-Binding para representar o pacote de onda eletrônico. Foram investigadas as circunstâncias em que os campos elétricos induzem a partícula a executar movimento oscilatório, as oscilações de Bloch, mantendo-se dinamicamente localizada; Para dar cabo de tal tarefa foram utilizadas as grandezas desvio quadrático médio, participação eletrônoca, centróide, e probabilidade de retorno. Além disso, foram investigados os efeitos da interação elétron-fônon sobre a dinâmica do pacote, com ênfase na formação e dinâmica de pólarons. / In this work was analyzed the dynamic of the electron wave packet in a one-dimensional crystalline network under the action of DC/AC electrical field, for this, we use the Tight-Binding model to represent the electronic wave packet. We investigated the circumstances in which the electric fields induce the particle to perform oscillatory motion, the Bloch oscillations, remaining dynamically localized; To accomplish such a task were used the mean square deviation, electronic participation, centroid, and probability of return. In addition, we investigated the effects of the electron-phonon interaction on the dynamics of the package, with emphasis on the polaron formation and its dynamics.

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.