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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 1 to 10 of 16 (0.008 seconds)| 1 |
Miocene-Pliocene-Pleistocene paleoclimate and glacial history of the western Dry Valleys region, AntarcticaMarchant, David R. January 1993 (has links)
A case is made for the stability of the polar East Antarctic Ice Sheet since middle-Miocene time from landscape development and surficial sediments in the western Dry Valleys region, southern Victoria Land. The alternate hypothesis that calls for repeated Miocene and Pliocene growth and decay of wet-based ice sheets across East Antarctica requires atmospheric temperatures 20"C above present values and late Pliocene ice-sheet overriding of the Transantarctic Mountains. The geomorphological and sedimentological results suggest that these conditions were not met in the western Dry Valleys. Rather, mean annual atmospheric temperatures during the last 13.6 Ma were at most only 3° to SoC above present values; ice-sheet overriding occurred in middle Miocene time (> 13.6 Ma); and Pliocene glacier expansion was limited. These conclusions are based on field studies in the western Asgard Range and in the Quartermain Mountains. The chronology comes from 4OAr/39 Ar laser fusion analyses on individual volcanic crystals and glass shards removed from in-situ volcanic ashes that occur in stratigraphic association with unconsolidated diamictons in the western Dry Valleys region. The combined geomorphological and sedimentological evidence indicates that slope evolution in the western Dry Valleys was severely restricted since at least the middle Miocene. The implication is that most of the landscape is relict and that it reflects ancient erosion under semi-arid climate conditions prior to middle-Miocene time.
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The geology of the North Central Prins Karls Forland, SvalbardManby, Geoffrey Martin January 1979 (has links)
No description available.
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Morphology of western Dronning Maud Land and the regime and movement of its ice coverSwithinbank, C. W. M. January 1955 (has links)
No description available.
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The geology of the area between Drygalski Fjord and Annenkou Island, South Georgia, AntarcticaMair, B. F. January 1979 (has links)
No description available.
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Petrography, geochemistry and thermochronology of the Milford Sound area, New Zealand : implications for evolution of the eastern Gondwana marginRichards, Bryony Gail January 2010 (has links)
No description available.
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Modelling the water cycle on MarsBöttger, Henning M. January 2003 (has links)
No description available.
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Transform/subband analysis and synthesis of signalsJanuary 1990 (has links)
David M. Baylon and Jae S. Lim. / Includes bibliographical references (leaves 35-37). / Work supported by the Advanced Television Research Program. Work supported by the National Science Foundation. MIP 87-14969
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Localization and function of small protein subunits of the cyanobacterial Photosystem II complexDOBÁKOVÁ, Marika January 2008 (has links)
The Photosystem II complex (PSII) contains besides D1, D2, CP43, CP47 and several lumenal extrinsic proteins also a large number of small intrinsic subunits. These subunits are found in all kinds of oxygenic phototrophs and their sequences are usually highly conserved. It is assumed that the small subunits are involved in stabilization, assembly or dimerization of the PSII complex but their exact function remains largely unknown. Thus, we chose four small PSII proteins: cytochrome b-559, PsbH, PsbI and Psb28, and we studied their function and location in PSII of the cyanobacterium Synechocystis sp. PCC 6803. We attempted: (i) to better define the role of cyt b-559 in the assembly of PSII using various mutant strains lacking one or more PSII core protein subunits; (ii) to clarify the location of the PsbH subunit using NTA gold labelling methodology; (iii) to improve the available knowledge on function of the PsbI protein in the assembly and repair of the cyanobacterial PSII; and (iv) to confirm the presence of the Psb28 protein in PSII, to localize it and to establish its importance for the cyanobacterial PSII.
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The Formation of Achaemenid Art: Beyond Iconography and AttributionStavis, Jacob Marc January 2020 (has links)
Achaemenid Persian art is an area of ancient Near Eastern art that has received little art historical attention in recent years. In earlier scholarship dating from before the 1979 Iranian revolution, an overwhelming scholarly interest had focused on identifying ethnic origins and foreign influences behind its formation. These studies depended on an implicit assumption that the arts of the Achaemenid Empire may be understood as indices for human agents and imperial power, without giving much thought to those objects per se. Considering issues of style, historiography, and art historical categorization, this dissertation examines how scholars have “invented” a history of Achaemenid art, and proposes new methods for interpreting that corpus, looking beyond anthropocentric theories of empire still dominant in the field. Taking into account more recent theoretical approaches, such as object biographies, the ontology of images, and issues of space and place, my study reexamines these ancient works, looking into the ways that monuments were made and functioned in the ancient Neat East. I focus especially on site-specific “official” monuments including architectural sculpture and rock relief, and temporally limit my study to early monuments produced under Cyrus and Darius before Persepolis, to question an assumed teleology of Achaemenid style.
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Unter den Händen der Barbaren / Indian Captivity Narratives des kolonialen Nordamerikas in deutscher Sprache, 1697-1774 / In the hands of the barbarians / Indian Captivity Narratives from colonial North America in german language, 1697-1774Kroke, Claudia 18 December 2001 (has links)
No description available.
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