The importance of Labrador-Ungava as one of the main gathering grounds and centres of dispersal of the Laurentide ice sheet, and as the location of the final disappearance of the ice was recognized as early as 1896 with the publication of the reports of the government geologist, A.P. Low. Despite this knowledge the peninsula has received very little attention until recently, due undoubtedly to its inaccessibility, and to the practical difficulties of field research in the subarctic environment. Until about 1945 the studies of glacial geomorphology that had been completed ( with the exception of the early work of Low) were almost entirely confined to the coastal regions, in particular to the Atlantic coast of Labrador. The most significant scientific contribution was that of Tanner, who visited the coast of Labrador in 1937 and 1939. The investigations of Tanner and his colleagues, and Tanner (1944) synthesis of the reports of earlier geologists were published in a summary of the glaciations of the entire peninsula, which remains the standard regional reference to this day. Inevitably, with the meagre, and o:tten not entirely accurate information of the interior parts of Labrador Ungava there is a marked contrast in the degree to which detailed evidence is available to the glacial geomorphologist, attempting to decipher the details of glaciation over the whole peninsula.

Domenico Scarlatti (1685-1757) – vienas žymiausių Baroko epochos italų kompozitorių, klavesinininkų, vargonininkų, pedagogų ir atlikėjų. Jo klavesininė kūryba yra neabejotinas XVIII a. muzikinės kultūros fenomenas. D. Scarlatti kūryba susijusi su laikotarpiu, kada nuo polifoninio stiliaus pereita prie homofoninės muzikos kalbos braižo. Nors kompozitorius yra sukūręs įvairių muzikinių kompozicijų, tačiau reikšmingiausią kūrybos dalį sudaro klavesininės sonatos. Jos ir įamžino italų kompozitoriaus vardą muzikinės kūrybos istorijoje. Iš sukurtų apie 600 klavyrinių sonatų, šiuo metu atlikėjams yra prieinamos apie 500. D. Scarlatti savo sukurtas klavesinines kompozicijas pavadino „Essercizi per Gravicembalo“ (etiudai, pratimai, bipartitos klavesinui). Daugelis šių sonatų kompozitoriui praversdavo jo pedagoginiame darbe. Savo sukurtose sonatose D. Scarlatti techninius uždavinius derindavo su meniniu turiniu. Nors italų meistro klavyriniai kūriniai pavadinti sonatomis, tačiau, pagal jose esančius įvairiems žanrams būdingus bruožus, kompozicijas galime suskirstyti į svarbiausius mokyklinio repertuaro žanrus: polifoninės sandaros kompozicijas, etiudus, stambios formos tipo kūrinius bei įvairaus pobūdžio pjeses. Kompozitorius kaip tikras virtuozas ir revoliucionierius buvo daugelio naujovių savo klavesininėje kūryboje bei jos atlikime skleidėjas. Jo kūryboje užfiksuoti tokie pasiekimai kaip: žėrinčių gamų per kelias oktavas pasažai, įvairiausios faktūros arpeggio (trumpi ir laužyti)... [toliau žr. visą tekstą] / Domenico Scarlatti (1685-1757) – one of the most famous Baroque epoch italian composer, harpsichordist, organist, pedagogue and performer. His harpsichord creativity is undoubted XVIII century phenomenon of music culture. D. Scarlatti piano works are realted to the period, when homophonic music language came over polyphonic style. Though the composer created various kind of compositions, the most important part of creativity is the harpsichord sonatas. These pieces monumentalized the name of the italian composer into the history of music life. He created more than 600 harpsichord sonatas, but today there are only about 500 available to performers. D. Scarlatti‘s harpsichord compositions named by him self „Essercizi per Gravicembalo“ (etudes, exercises, bipartitas for harpsichord). Most of these sonatas were useful in composers pedagogic work. In his sonatas, D. Scarlatti has associated technical exercises with artistical matters. Piano pieces of the italian maestro were titled by the name of sonatas, but of the features existent in them, we can collect these compositions into most important genres in music school repertoire: polyphonic structure compositions, etudes, big forms type pieces and various kind of plays. The composer was a spreader of this many novelty in his harpsichord creativity work and in performing it like a really virtuoso and big revolutionist. His works include such achievements as: sparkling scale passages through several octaves, various kind of... [to full text]

Univ., Diss.--Regensburg, 2005.

Published also as Thesis--Tübingen. / Bibliography: p. [150]-160.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1960. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 90-92).

Thesis (doctoral)--Chalmers tekniska högskola, 1983. / Errata slip inserted. Summary in English. Includes bibliographical references (p. 164-171).

Made available in DSpace on 2014-08-20T14:22:03Z (GMT). No. of bitstreams: 1 tese_thais_cappellaro.pdf: 1178404 bytes, checksum: 100caf1aecc29b796007f6657cafc836 (MD5) Previous issue date: 2013-03-26 / The propagation and growth of cv. Arbequina olive cuttings were studied at different epochs, concentrations of growth regulator, environment material collection and cultivation systems, along with the maintenance and rooting of cuttings from mother plants through three experiments conducted in greenhouse and plastic greenhouse Campus Didactic and Experimental Universidade Federal de Pelotas. The experiment 1 was conducted to evaluate the most appropriate epoch for rooting, the influence of the environment where the plants were located arrays and the effect of different concentrations of IBA (IBA) on rooting semihardwood cuttings of olive, Arbequina cultivar. Rooting was tested in three epochs (winter, spring and summer), collecting material environment (greenhouse and open field) and five concentrations of IBA (0, 1000, 2000, 3000 and 4000 mg l-1). The minicuttings were collected and standardized with two pairs of buds and leaves a pair of socks and subsequently placed for rooting in plastic boxes with average particle size of vermiculite, after preparation were placed in a greenhouse with controlled temperature of 25 ± 2 ° C for 80 days in three epoch. The evaluated variables were: percentage of minicuttings survival, percentage of rooted minicuttings, number of roots per minicutting and length of the roots. Minicuttings coming greenhouse provide greater survival, rooting number and root length. Spring is the epoch that, regardless of the collection environment, provide greater survival, rooting, number and length of roots. The use of material from open field and regulator at 3000 mg.L-1 provides greater rooting. Material collected in spring subjected to concentrations of 3000 and 4000 mg.L-1 produce greater number of roots. The experiment 2 was conducted to evaluate the growth of olive seedlings obtained by minicutting Arbequina cultivar in soilless systems and at different epoch. The rooted minicuttings were placed to grow in three systems (semi-hydroponic, NFT -Nutrient Film Technique- and conventional ), in two epochs (fall / winter and spring / summer) for five months of cultivation. In the semi-hydroponic system substrate used was sand and irrigated daily with nutrient solution. In NFT the cuttings were placed in phenolic foam which were irrigated through intermittent flow and in the conventional plants were grown in plastic bags filled with a substrate Carolina ®, being provided 100ml of nutrient solution every 15 days. The variables analyzed were: number of shoots, shoot length, number of secondary shoots and secondary shoots length during the growing season and after 150 days of cultivation variables analyzed were: stem diameter, fresh and dry weight of shoots, fresh and dried root. The use of semi-hydroponic system provides greater plant growth. The epoch of greatest light intensity provides greater plant growth. The use of semi-hydroponic system and epoch 2 of warmer temperatures (spring / summer) provide increased plant growth. The experiment 3 was to evaluate the rooting of olive minicuttings from mother plants packed in soilless systems and conventional and assess the nutrient content of these minerals mother plants in two cropping epochs (fall / winter and spring / summer). The plants were in three cropping systems which were described in the second experiment. The minicuttings were collected in winter and set to root as the first experiment, but the IBA concentration was 3000 mg.L-1. The variables analyzed after 80 days were: percentage of minicuttings survival, percentage of minicuttings, number of roots per minicuttings, length of roots and for the analysis evaluated the nutritional content of macronutrients and micronutrients and dry mass of shoots and the root. The use of material from headquarters in soilless systems and conventional not differ in rooting of cuttings in winter. The semi-hydroponic system at epoch 2 (spring / summer) achieved higher levels of nutrients. In epoch 2 the semi-hydroponic system produces higher dry mass´´ content of shoot and root / A propagação e o crescimento de miniestacas de oliveira cv. Arbequina foram estudados em diferentes épocas, concentrações de regulador de crescimento, ambiente de coleta do material e sistemas de cultivo, juntamente com a manutenção e o enraizamento de miniestacas provenientes de matrizeiros, através de três experimentos conduzidos em casa de vegetação e estufa plástica no Campus Didático e Experimental da Universidade Federal de Pelotas. O experimento 1 foi realizado com o objetivo de avaliar a época mais adequada para o enraizamento, a influência do ambiente onde estavam localizadas as plantas matrizes e o efeito de diferentes concentrações de AIB (ácido indolbutírico) no enraizamento de miniestacas semilenhosas de oliveira, cultivar Arbequina. O enraizamento foi testado em três épocas (primavera, inverno e verão), ambiente de coleta do material (casa de vegetação e campo aberto) e cinco concentrações de AIB (0, 1000, 2000, 3000 e 4000 mg.L-1). As miniestacas de cada ambiente de cultivo das plantas matrizes foram coletadas e padronizadas com dois pares de gemas e um par de meias folhas e posteriormente colocadas para enraizar em caixas plásticas com vermiculita de granulometria média, após o preparo foram colocadas em casa de vegetação com temperatura controlada de 25 ±2°C durante 80 dias nas três épocas. As variáveis analisadas foram: porcentagem de miniestacas vivas, porcentagem de miniestacas enraizadas, número de raízes por miniestaca e comprimento das raízes. Miniestacas procedentes de casa de vegetação proporcionam maior sobrevivência, enraizamento, número e comprimento de raízes. A primavera é a época que, independente do ambiente de coleta, proporcionam maior sobrevivência, enraizamento, número e comprimento das raízes. A utilização de regulador de crescimento é influenciada pelo ambiente de coleta. O uso de material proveniente de ambiente aberto e de regulador a 3000 mg.L-1 proporciona maior enraizamento. Materiais coletados na primavera e submetidos às concentrações de 3000 e 4000 mg.L-1 produzem maior número de raízes. O experimento 2 foi conduzido com o objetivo de avaliar o crescimento de mudas de oliveira obtidas por miniestaquia da cultivar Arbequina em sistemas de cultivo sem solo e em diferentes épocas. As miniestacas enraizadas foram colocadas para crescer em três sistemas (semi-hidropônico, NFT - Nutrient Film Technique- e convencional), em duas épocas (primavera/verão e outono/inverno) durante cinco meses de cultivo. No sistema semi-hidropônico o substrato utilizado foi a areia, sendo diariamente irrigadas com solução nutritiva. No sistema NFT, as miniestacas foram colocadas em espuma fenólica as quais foram irrigadas através de fluxo intermitente, três vezes ao dia por 5 minutos e no sistema convencional as plantas foram cultivadas em sacos plásticos preenchidos com substrato Carolina®, sendo fornecidos em média 100ml de solução nutritiva a cada 15 dias. As variáveis analisadas foram: número de brotações, comprimento de brotações, número de brotações secundárias e comprimento de brotações secundárias durante o período de cultivo e após 150 dias de cultivo as variáveis analisadas foram: diâmetro do caule, massa fresca e seca da parte aérea, massa fresca e seca da raiz. A utilização do sistema semi-hidropônico e a época 2 de temperaturas mais altas (primavera/verão) proporcionam maior crescimento das plantas. O experimento 3 teve como objetivo avaliar o enraizamento de miniestacas de oliveira provenientes de plantas matrizes acondicionadas em sistemas de cultivo sem solo e convencional e avaliar o conteúdo de nutrientes minerais destes matrizeiros em duas épocas de cultivo (primavera/verão e outono/inverno). As plantas matrizes encontravam-se em três sistemas de cultivo os quais foram descritos no experimento 2. As miniestacas foram coletadas no inverno e colocadas para enraizar conforme o experimento 1, porém a concentração de AIB utilizada foi de 3000 mg.L-1. As variáveis analisadas após o período de 80 dias foram: porcentagem de miniestacas vivas, porcentagem de miniestacas enraizadas, número de raízes por miniestaca, comprimento das raízes e para a análise nutricional foram avaliados os conteúdos de macronutrientes e micronutrientes e massa seca da parte aérea e da raiz. A utilização do sistema semi-hidropõnico assoaciado a época 2 (primavera/verão) proporcionam maiores teores de nutrientes e produzem maiores conteúdos de massa seca da parte aérea e raiz. Termos para indexação: propagação, estações do ano, época de crescimento, Olea europaea.

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The waters of the Indian Ocean southeast of Africa are a crucial junction for surface and deep ocean processes that serve as vital controls on Earth’s climate system. At the surface, the Agulhas Current, its retroflection, and Agulhas Leakage transfer water from the Indian and South Atlantic. The addition of this heat and salt to the Atlantic Basin helps drive the Meridional Overturning Circulation and the formation of deep water in the North Atlantic Ocean. On the timescales of centuries, the Meridional Overturning Circulation ultimately returns this water back to the Indian Ocean in the form of North Atlantic Deep Water. Proxy reconstructions show that the vigor of ocean overturning is immensely important to the global climate system, driving changes in atmospheric CO₂ concentrations and temperature and precipitation patterns across the planet. I use x-ray fluorescence core scanning, sediment provenance techniques, and core images from International Ocean Discovery Program Site U1474, located in the Natal Valley of the southwest Indian Ocean, to investigate past changes in the Agulhas Current and North Atlantic Deep Water. 40K/40Ar provenance ages measured on the clay fraction of sediment from Site U1474 indicate that, despite its great distance from the core site, the Zambezi is the most important factor influencing the deposition of terrigenous sediment in the Natal Valley. We present these results in a quantitative way, reinforcing the conclusions of previous studies. However, a comparison to newly available proxy records influenced by current speed and hydroclimate suggests that the strength of the Agulhas does not have a major influence on terrigenous sediment sources, at least at the headwaters of the Agulhas Current. Instead, I suggest that low-latitude hydrologic processes driven by zonal and meridional temperature gradients in conjunction with sea level are responsible for sediment source variability. In core photos, I found evidence for deep water variability in the Natal Valley in the form of millimeter-to-centimeter scale layers of olive-green sediment. To an overwhelming extent, these layers are formed during glacial periods, especially at their termination. I complement observations at Site U1474 with published proxy data for oxygen concentrations and measurements of total organic carbon percent in the Natal Valley and by extending our search for these green layers to core sites around the world. With these data, it is possible to confidently connect these layers to organic carbon concentrations in the sediment, reduction-oxidation processes in sediments following burial, and the local concentration of dissolved oxygen in the deep water. There are comparable fluctuations in the abundances of green layers in core sites in the path of North Atlantic Deep Water during glacial cycles, where more frequent and more intense green layer formation is driven by higher bottom water oxygen concentrations. Peaks in the abundance of green layers approximately 250 ka and 900 thousand years ago coincide with global scale excursions toward isotopically light benthic carbon isotopes. Connecting the green layers to the release of isotopically light organic carbon from sediments leads me to propose that long-observed fluctuations in the carbon cycle may be attributable to deep ocean oxygenation.