Humboldt-Univ., Diss.--Berlin, 2004.

Zugl.: Berlin, Humboldt-Univ., Diss., 2004

Texte remanié de: Dissertation--Berlin--Humboldt-Universität, 2004. / Bibliogr. p. [290]-303.

Thesis (doctoral)--Humboldt-Universität, Berlin, 2004. / Includes bibliographical references (p. [290]-303).

L'investigation du système La4TI3O12-LaTiO3 a permis de mettre en évidence une nouvelle série homologue de formulation LanTin-xO3n. Les structures de ces phases ont été caractérisées par diffraction des rayons X sur poudre et par microscopie électronique en transmission. Elles dérivent de différents polytypes de perovskites hexagonales et présentent une distorsion structurale due a la rotation coopérative des octaèdres autour de leurs axes ternaires. Une nouvelle serie de composes Ba2MM' F7Cl (M, M' = Mn, Fe, Co, Ni, Zn), dont les structures ont été déterminées par diffraction des rayons X sur monocristal, a été par ailleurs mis en évidence. Une étude comparative des propriétés structurales et magnétiques avec celles des composés de la série BaMF4 a été effectuée (filiation structurale résultant de différentes rotations coopératives des octaèdres, mesures d' aimantation sur poudre et monocristal, détermination des structures magnétiques de Ba2Co2F7Cl et Ba2Ni2F7Cl par diffraction des neutrons). Un nouveau chlorofluorure du cuivre a également été caractérise sur le plan structural et magnétique. Dans ce cas, une filiation structurale avec la structure de l'apatite et avec celle de phases derivees est proposée.

This master’s thesis deals with designs and implementation of systems for music cover recognition. The introduction part is devoted to the calculation parameters from audio signal using Music Information Retrieval techniques. Subsequently, various forms of cover versions and musical aspects that cover versions share are defined. The thesis also deals in detail with the creation and distribution of a database of cover versions. Furthermore, the work presents methods and techniques for comparing and processing the calculated parameters. Attention is then paid to the OTI method, CSM calculation and methods dealing with parameter selection. The next part of the thesis is devoted to the design of systems for recognizing cover versions. Then there are compared systems already designed for recognizing cover versions. Furthermore, the thesis describes machine learning techniques and evaluation methods for evaluating the classification with a special emphasis on artificial neural networks. The last part of the thesis deals with the implementation of two systems in MATLAB and Python. These systems are then tested on the created database of cover versions.

Gegenstand der Arbeit sind verschiedene Aspekte der Morphosyntax und Tonologie im Buli, einer in Ghana (Upper East Region nahe der Grenze zu Burkina Faso) gesprochenen Gursprache des Niger-Kongo-Phylums, die bisher nur unzureichend beschrieben wurde. Die grammatische Beschreibung gibt einen umfangreichen Einblick in das sprachliche System des Buli und umfasst Kapitel zu den folgenden Themen: Phonologie, Nominalklassensystem, Pronominalsystem, Komplexe Nominalphrasen und nominale Syntagmen, Verbsystem. Dies geschieht in erster Linie anhand des in Wiaga gesprochenen Buli, wird aber durch die Bezugnahme auf andere Dialekte sowie auf verwandte Gursprachen ergänzt, beispielsweise hinsichtlich der Bewertung tonaler Divergenzen in Nominalklassensuffixen oder in Assoziativkonstruktionen. Die autosegmental angelegte Tonstudie verfolgt keine theoretischen Ziele, sondern hat sich unmittelbar aus dem Bedarf einer adäquaten Beschreibung der synchronen Sprache ergeben, in der Ton sowohl in lexikalischer als auch in grammatischer Hinsicht ganz zentrale Aufgaben übernimmt. Dabei wurden neben regelmäßigen Ton–Sandhi-Erscheinungen (Tieftonausbreitung) auch interessante Phänomene an den Schnittstellen der Phonologie zur Syntax und zur Semantik-Pragmatik vorgefunden, z.B. die tonale Kongruenz bestimmter Verbformen mit der Diskursrolle des Subjekts (+/- Diskurspartizipant, d.h. 1./2. Person vs. 3. Person) oder das Vorkommen eines Grenztons an äußerungsfinalen Morphemen, zu denen auch die Klassensuffixe indefiniter Substantive und enklitische Objektpronomen am Verb gehören. Im Rahmen der morphosyntaktischen Analysen wurde unter anderem ein aus typologischer Sicht spannender nominaler Kompositionstyp identifiziert, der sich neben seinen strukturellen Eigenschaften auch durch eine spezifische possessive Semantik auszeichnet und vermutlich an der Entwicklung von attributiven (qualifizierenden) Adjektiven und eines von zwei Zahlwörtern für ‘eins’ beteiligt war. / This work deals with different aspects of the morphosyntax and tonology in Buli, a Gur language of the Niger-Congo-Phylum, which is spoken in Ghana (Upper East Region near the border to Burkina Faso) and has so far been described insufficiently. The grammatical description provides an extensive insight into the linguistic system of Buli and contains chapters concerning the following topics: phonology, noun class system, pronominal system, complex noun phrases and nominal syntagmata, and verb system. It is primarily based on the Buli variant spoken in Wiaga and supplemented by reference to other dialects as well as to related Gur languages, for instance with regard to tonal divergencies in noun class suffixes and in associative constructions. Following an autosegmental model, the tonal study does not aim at theoretic enhancement, but results directly from the need of an adequate description of the synchronic language in which tone plays an important role in lexicon and grammar. Besides regular Tone-Sandhi (Low tone spreading), interesting phenomena at the phonology/syntax interface as well as at the phonology/semantics-pragmatics interface were observed – e.g. some verb forms displaying tonal agreement with the discourse role of the subject (+/- discourse participant, i.e. 1st / 2nd vs. 3rd person) or the appearance of a boundary tone on utterance-final morphemes, including the noun class suffixes of indefinite nouns and the enclitic object pronouns at the verb. In the course of the morphosyntactic analysis, a typologically remarkable nominal compound type was identified that is distinguished by structural features as well as by specific possessive semantics and can be assumed to be involved in the development of attributive (qualifying) adjectives and one of two numerals with the meaning ‘one’.

Within the framework of this research, the complex geological history of the Pan African-Volta basin has been systematically reconstructed. Based on a broad review of literature and new data, 5 stages of geological-tectonic development have been identified. For the first time a systematic review of the mineral potential of the Pan-African Volta Basin was executed. Known and potentially existing mineralization have been related to the geotectonic history and metallogenetic conclusions have been drawn. Based on the findings of this research, the folded thrust belt located at the eastern rim of the Volta basin has been identified as the most prospective area for the ultramafic rocks with chromite, nickel mineralization and PGEs, hydrothermal gold and banded iron formation (BIF) but this will require further work.

Within the framework of this research, the complex geological history of the Pan African-Volta basin has been systematically reconstructed. Based on a broad review of literature and new data, 5 stages of geological-tectonic development have been identified. For the first time a systematic review of the mineral potential of the Pan-African Volta Basin was executed. Known and potentially existing mineralization have been related to the geotectonic history and metallogenetic conclusions have been drawn. Based on the findings of this research, the folded thrust belt located at the eastern rim of the Volta basin has been identified as the most prospective area for the ultramafic rocks with chromite, nickel mineralization and PGEs, hydrothermal gold and banded iron formation (BIF) but this will require further work.:Table of contents Table of contents iii List of tables v List of figures 1 Introduction 5 Summary of work done 6 Acknowledgements 6 1 In the Geology and regional geotectonic development of the West African Shield 7 1.1 Introduction 7 1.2 The basement of the Proterozoic sedimentary platform cover 9 1.3 Connection of West African Shield to Brazil 10 1.4 The Neoproterozoic sedimentary sequence and the extent of the Volta Basin 13 1.4.1 Introduction 13 1.4.2 The Neoproterozoic Sedimentary Sequence 15 1.5 The Pan-African Mobile Belt 23 1.5.1 The Buem Fold and thrust belt 23 1.5.2 New defined units 30 1.6 Interpretation of the deep structure of the Volta Basin 35 1.7 Metallic Minerals 37 1.7.1 Introduction 37 1.7.2 Iron (Fe) 39 1.7.3 Aluminium (Al) 46 1.7.4 Manganese (Mn) 50 1.7.5 Lead (Pb) 52 1.7.6 Copper (Cu) 55 1.7.7 Mineralisation related to ultramafic rocks 57 1.7.8 Gold (Au) 69 1.7.9 Tantalum (Ta) 72 1.7.10 Zirconium (Zr) 73 1.7.11 Heavy minerals in sands of Paleochannels 76 1.8 Non-metallic minerals 83 1.8.1 Introduction 83 1.8.2 Limestone (CaCO3) 84 1.8.3 Magnesite (MgCO3) 91 1.8.4 Barite (BaSO4) 93 1.8.5 Diamonds 97 1.8.6 Bitumen 100 1.9 Mineral Prediction with advangeo® Prediction Software 102 2 Minerogeny 109 2.1 Mineralisation controls and indicators 109 2.1.1 Geochemical Properties of selected stratigraphic units 109 2.1.2 Intrusive rocks 114 2.1.3 Volcanic rocks 118 2.1.4 Fault structural controls 119 2.1.5 Reactive Rocks 121 2.1.6 Other sedimentary controls: placers and paleoplacers 122 2.1.7 Laterites 122 2.1.8 Control of diamond occurrences 132 2.2 Key stages of metallogenic development 132 3 Discussion and recommendations 136 3.1 Recommendations 138 4 List of References 139 5 Appendices 144 5.1.1 Sample G113RK1 144 5.1.2 Sample G109RK1 145 5.1.3 Sample G116RK1 147 5.1.4 Sample G121RK1 149 5.1.5 Sample G121RK2 151 5.1.6 Sample G121RK3 152 5.1.7 Sample G131RK1 154 5.1.8 Sample G144RK2 155 5.1.9 Sample G145RK1 156 5.1.10 Sample G147RK1 157 5.2 Thin Sections 159 5.3 Deep drilling Data 174 5.4 Geophysical Datasets 176 5.5 Geochemical properties of volcanic rocks 181 5.6 Regional Geochemical Datasets (MSSP) 186 5.6.1 Methodology of data processing 188 5.7 Geochemical analysis – Electronic Dump 190 5.8 Geochemical properties of selected geo-tectonic units 190 5.8.1 Epicratonic basin 190 5.8.2 Foreland Basin 195 5.8.3 Thrusted continental margin 202