Suite no.5 in C minor for violoncello solo / Johann Sebastian Bach -- Treizieme concert a 2 instruments a l'unisson / Francois Couperin -- Concerto for couble bass in b minor / Giovanni Bottesini -- Bass trip / Peteris Vasks. / text

This dissertation is intended to fulfill a need for intermediate study material for the double bass. Studies that have been written, using twentieth century compositional techniques, are for the most part out of reach of the intermediate student. The extant contemporary studies extend the range of the instrument beyond the usual orchestral gamut and, combined with rapidly changing meters, rhythmic complexities, and new notation systems, tend to be studies for the more mature student of the double bass.The goals for the studies as instructional aids were (1) to select, arrange and create contemporary studies and pieces for the intermediate double bass player; and (2) to limit these studies to the lower gamut of the instrument and prepare the intermediate student for the technical and musical complexities that are a part of the extant studies for the more advanced student of double bass.Musical styles used are: jazz rhythms and harmonies, folk songs and dances, liturgical melody, classical suite and serial set.As an aid to understanding these studies and pieces, a tape recording of each study is an integral part of the dissertation. Included are two keyboard accompaniments and suggestions for the use of other instrumental combinations. It is hoped that some studies may be found appropriate for concert or recital performance.Study One is concerned with the performance problems of unbarred recitative and color usage. Ponticello, glissando, pizzicato, ricochet, tremolo and col legno are added to achieve color contrast in this study.Study Two consists of four traditional Greek songs. They are written in uneven meters of five and seven and combinations of two and three. Indication for rubato style, Bartok or "snap" pizzicato, portamento,and slurred pizzicato add to the performance problems of this study.Study Three is based on the entire melodic material of "Dies Irae". It is arranged in three settings: (1) improvised, (2) in tempo with guitar accompaniment,and (3) improvised with the use of natural harmonics. Other techniques employed are micro-tones and double stops.Study Four focuses on the problem of spiccato bowing. It is written in the tenor clef to advance reading ability. The piece may be played unaccompanied or with keyboard accompaniment.Study Five is a study in phrasing. It is an atonal work with piano accompaniment. and is based on a four-note set. The solo line, by transposition, eventually employs all of the tones of the chromatic scale.Study Six is designed as a study in pizzicato,. Pizzicato techniques are: slurred, drummed, left-hand, thumb, Bartok, arpeggiando and L. H. pizzicato semmre. The pitches are a combination of pressed tones and natural harmonics.Preceding each piece is a description or discussion of the technical problems peculiar to that study.

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De nouveaux complexes alkyle d’aluminium originaux comportant des ligands chiraux potentiellement tridentates hautement modulables de type phénolato-imino-sulfonamide (PISA) ont été synthétisés et caractérisés.D’autre part, dans une optique de développement de procédés plus propres, de nouveaux matériaux hybrides ont été préparés par immobilisation sur silice de complexes d’aluminium, d’ytterbium et de zinc sur silice. Ces complexes chiraux moléculaires et supportés ont été utilisés en silylcyanation énantioselective des aldéhydes et des cétones en présence d’une base de Lewis. D’excellentes conversions et sélectivités ont été obtenues pour une large gamme de substrats.Les aspects mécanistiques de ces systèmes catalytiques bifonctionnels ont également été abordés. / New alkyl aluminium complexes supported by potentially tridentate, highly tunable chiral ligands of the phenolato-imino-sulfonamide type (PISA) were synthesized and characterized.In the view of developping cleaner chemical processes, new hybrid materials were prepared by immobilization of aluminum, ytterbium and zinc complexes onto silica.These molecular and supported species have been used in enantioselective silylcyanation of aldehydes and ketones in the presence of a Lewis base. Excellent conversions and selectivities were achieved for a broad scope of substrates.Mecanistic aspects of this type of bifunctional catalytic systems have also been studied.

La mitochondrie et le plaste sont des organites essentiels au sein de la cellule végétale. Les processus du métabolisme de l’ARN tels que la transcription, les modifications post-transcriptionnelles d'épissage et d’édition et la traduction des organites sont très similaires. Parmi les acteurs de ces processus, les protéines PentatricoPeptide Repeat (PPR) ont un rôle prépondérant. Dans ce travail de recherche, j’ai évalué, dans un premier temps, la double localisation des protéines PPR vers la mitochondrie et le chloroplaste chez Arabidopsis thaliana. La synthèse de l’ensemble des données ont permis d’établir que sur les 473 membres de la famille PPR chez A. thaliana, 9% ont une potentielle double localisation dans les deux organites. Un partie de ce travail de thèse, analyse et discute les implications évolutives et fonctionnelles au sein de cette classe de localisation. Afin de comprendre l’activité des protéines PPR dans les deux organites, j’ai focalisé mes analyses fonctionnelles sur quatre protéines PPR (OTP90, OTP91, OTP100 et DYW2) potentiellement impliquées dans le phénomène d’édition. Dans ce travail de thèse, j’ai pu mettre en évidence que les protéines OTP90 et DYW2 agissent sur l’édition des transcrits des organites et particulièrement que la protéine DYW2 participe dans l’édition des transcrits chloroplastiques comme aussi sur des transcrits mitochondriaux. Ainsi, les résultats de mon travail de recherche s’ajoutent aux récentes données, obtenues de par le monde, montrant que les protéines PPR peuvent avoir de rôles complexes bien influençant à la fois divers transcrits et/ou processus dans le métabolisme de l’ARN des organites. / Mitochondrial and plastid are essential organelles within the plant cell. The process of RNA metabolism such as transcription, post-transcriptional modifications as splicing and editing and translation are very similar in these organelles. Among the actors of these processes, the PentatricoPeptide Repeat (PPR) proteins have an important role. In this research, firstly, I assessed the dual localisation of PPR proteins to mitochondria and chloroplasts organelles in Arabidopsis thaliana. The synthesis of all the data, those produced during my thesis, those available in the literature and those contained in the proteomic databases have revealed that between the 473 members of the PPR family in A. thaliana, 9 % are potentially dually localaized in both organelles. A part of this thesis analyzes and discusses the evolutionary and functional implications of this class of localisation in the PPR family. In order to understand the activity of PPR proteins in both organelles, I focused my work in the functional analysis on four PPR proteins (OTP90, OTP91, OTP100 and DYW2 ) potentially involved in the editing process. Although functional characterization of these four proteins has not been fully completed, in this thesis, I was able to demonstrate that the OTP90 and DYW2 proteins act on editing of organelles transcripts and particularly I found that the DYW2 protein participates in the editing of chloroplast and mitochondrial transcripts. Thus, the results of my research are in concordance to recent data obtained by the world, showing that PPR proteins have complex roles influencing several transcripts and/or processes in the RNA metabolism of organelles.

Observations were made of 309 binary systems between RA 17h - 07h and Dec -70 degrees to -60 degrees. The images were calibrated against pairs measured for CCD astometry. Measurements were made of separations, position angles and differential magnitudes. Uncertainties in position angle and separation were 7.8o/p and 0.16 arcseconds respectively. The position angles, separations and differential V magnitudes were compared with WDS figures. It was determined that only 29% _+ 5% of the observed pairs had undergone significant movement since the last previous measurement, which agrees with the results of a survey of the WDS. A statistical study of 1q77 pairs found that the spread of calculated separations agreed with those found by other authors, while the distribution of periods, while falling within the range(s) calculated by other authors, were significantly longer. A short-arc fitting program was tested using data derived from the published orbit of Centauri before being applied to seven observed pairs. Orbits could be calculated for six of the seven pairs. For four of these pairs the observed movement may be due to proper motion rather than orbital motion / Master of Science (Hons)

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Theses (master's)--Vienna University of Economics and Business Administration, 2007. / Includes register. Collection of master's theses of the 2006/2007 postgraduate LLM program "International Tax Law" at the Vienna University of Economics and Business Administration.