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  • About
  • 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.
11

Reflections on ice : scattering of flexural gravity waves by irregularities in Arctic and Antarctic ice sheets

Williams, Timothy D. C., n/a January 2006 (has links)
This thesis studies the scattering properties of different types of imperfections in large Arctic and Antarctic ice sheets. Such irregularities include cracks, pressure ridges and both open and refrozen leads. The scattering by a transition region between sea ice and a very thick ice shelf, for example as is found in the Ross Sea in Antarctica, is also treated. Methods of solution are based on applications of Green�s theorem to the appropriate situation, which leads to either a single integral equation or a pair of coupled integral equations to be solved at the boundary between the ice and the sea water. Those equations over a finite interval are solved using numerical quadrature, while those over semi-infinite ranges are solved using the Wiener-Hopf method. Results calculated using different techniques are able to be checked against each other, giving us great confidence in their accuracy. In particular, the scattering by three ice sheets of different thicknesses is confirmed analytically by mode-matching coupled with the residue calculus technique. The scattering by the single irregularities is investigated partly for its own sake, and partly with the aim of using it to treat the scattering when large numbers of features are included in a single ice sheet. The principal objective of doing this is to observe the change in the general amounts of reflection and transmission as the background ice thickness is changed. There is enough variation in our results for us to conclude that there is definite potential for using the change in an incident wave spectrum after passing through a given ice field to estimate the background ice thickness.
12

Frost heaving and surface clast movement in turf-banked terraces, Eastern Glacier National Park, Montana /

Sawyer, Carol Frances. January 1900 (has links)
Thesis (Ph. D.)--Texas State University-San Marcos, 2007. / Vita. Appendices: leaves 178-213. Includes bibliographical references (leaves 214-234).
13

Ice shedding from cables and conductors : a cracking model of atmospheric ice = Délestage de glace des câbles et des conducteurs : un modèle de rupture fragile de la glace atmosphérique /

Kermani Koosheh, Majid, January 2007 (has links)
Thèse (D.Eng.) -- Université du Québec à Chicoutimi, 2007. / La p. de t. porte en outre: Thèse présentée à l'Université du Québec à Chicoutimi comme exigence partielle au doctorat en ingénierie. CaQQUQ Bibliogr.: f. [211]-220. Document électronique également accessible en format PDF. CaQQUQ
14

Numerical and experimental studies of the mechanical behaviour at the ice/aluminium interface = Études numérique et expérimentale du comportement mécanique à l'interface glace/aluminium /

Matbou Riahi, Mehran, January 2007 (has links)
Thèse (M.Eng.) -- Université du Québec à Chicoutimi, 2007. / La p. de t. porte en outre: Mémoire présenté à l'Université du Québec à Chicoutimi comme exigence partielle de la maîtrise en ingénierie. CaQCU Bibliogr.: f. 137-143. Document électronique également accessible en format PDF. CaQCU
15

An investigation of L-moments and the generalized logistic distribution : applied as a new way to model ice strength /

Bartholomew, Linda, January 1995 (has links)
Thesis (M.A.S.)--Memorial University of Newfoundland. / Typescript. Bibliography: leaves 75-79. Also available online.
16

Ice forces on a faceted cone due to the passage of a level ice field /

Lau, Michael Wai-Hung. January 1999 (has links)
Thesis (Ph. D.), Memorial University of Newfoundland, 1999. / Restricted until June 2000. Bibliography: p. 306-330.
17

Damage and microstructural change in laboratory grown ice under high pressure zone conditions /

Melanson, Paul M., January 1998 (has links)
Thesis (M. Eng.), Memorial University of Newfoundland, 1998. / Bibliography: leaves 125-129.
18

Damage and fracture of brittle viscoelastic solids with application to ice load models /

Xiao, Jing, January 1997 (has links)
Thesis (Ph..D.), Memorial University of Newfoundland, 1998. / Restricted until June 1999. Bibliography: leaves 179-187.
19

Ships in ice : the interaction process and principles of design /

Zou, Bin, January 1996 (has links)
Thesis (Ph.D.)--Memorial University of Newfoundland, 1997. / Bibliography: leaves 174-181.
20

Water-drag coefficients in the Beaufort Sea : AIDJEX 1975-76

LeBlanc, Alain, 1952- January 1981 (has links)
No description available.

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