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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

Characterization of the small scale ice sheet topography of Antarctica and Greenland /

Smith, Benjamin E. January 2005 (has links)
Thesis (Ph. D.)--University of Washington, 2005. / Vita. Includes bibliographical references (p. 98-104).
12

Ice navigation with ice compressionin the Gulf of Finland

Berg, Niklas January 2010 (has links)
<p>Safe winter navigation is a hot topic. Not only is the traffic density increasing but theenvironmental considerations are also getting bigger. An oil leakage from a big oiltanker can be of catastrophic proportions in the wrong area and more trafficincreases the risk of an accident. A project that aims for safer winter navigation isSafeWIN. The aim of this project is to develop a forecasting system for compressiveice and thus make winter navigation safer.This thesis is part of above mentioned project and aims to investigate what influenceice compression and ice class has on winter navigation. Vessels are exclusivelyAFRAMAX size tankers sailing on Primorsk in the Gulf of Finland during 2006. Transitdata comes from AIS tracks recorded by the Swedish Maritime Administration. Adatabase with tanker transits has been created and this information is the source forthe studies in this thesis. Included in the database are wind data, ice particulars andtransit information such as speed, and time at different activities during the transit.Average values for a transit has been investigated for comparison and to get a pictureof an average transit.Velocity, waiting time and time with assisting icebreaker are parameters that arebelieved to show how a tanker performs in winter navigation. These parameters arecompared with ice compression and ice class separately to see if there is acorrelation. Ice compression has also been investigated for correlation towards windforce to see if stronger wind generates stronger compression.Using the velocity in different ice compressions an estimate of ice resistance that stemfrom ice compression has been extracted by means of Lindqvist’s formula.</p>
13

Ice navigation with ice compressionin the Gulf of Finland

Berg, Niklas January 2010 (has links)
Safe winter navigation is a hot topic. Not only is the traffic density increasing but theenvironmental considerations are also getting bigger. An oil leakage from a big oiltanker can be of catastrophic proportions in the wrong area and more trafficincreases the risk of an accident. A project that aims for safer winter navigation isSafeWIN. The aim of this project is to develop a forecasting system for compressiveice and thus make winter navigation safer.This thesis is part of above mentioned project and aims to investigate what influenceice compression and ice class has on winter navigation. Vessels are exclusivelyAFRAMAX size tankers sailing on Primorsk in the Gulf of Finland during 2006. Transitdata comes from AIS tracks recorded by the Swedish Maritime Administration. Adatabase with tanker transits has been created and this information is the source forthe studies in this thesis. Included in the database are wind data, ice particulars andtransit information such as speed, and time at different activities during the transit.Average values for a transit has been investigated for comparison and to get a pictureof an average transit.Velocity, waiting time and time with assisting icebreaker are parameters that arebelieved to show how a tanker performs in winter navigation. These parameters arecompared with ice compression and ice class separately to see if there is acorrelation. Ice compression has also been investigated for correlation towards windforce to see if stronger wind generates stronger compression.Using the velocity in different ice compressions an estimate of ice resistance that stemfrom ice compression has been extracted by means of Lindqvist’s formula.
14

The sensitivity of CSIM5 sea-ice simulations to atmospheric state variables

Lemcke, Mary D. January 2009 (has links)
Thesis (Ph.D.)--University of Delaware, 2009. / Principal faculty advisors: Tracy DeLiberty and Brian Hanson, Dept. of Geography. Includes bibliographical references.
15

Unique dynamic behaviors of ice divides : Siple Dome and the rheological properties of ice /

Pettit, Erin Christine. January 2003 (has links)
Thesis (Ph. D.)--University of Washington, 2003. / Vita. Includes bibliographical references (p. 153-163).
16

Ice stream dynamics : a transition between sheet flow and shelf flow /

Hofstede, Coen Matthijs, January 2008 (has links)
Thesis (Ph.D.) in Earth Sciences--University of Maine, 2008. / Includes vita. Includes bibliographical references (leaves 125-128).
17

Modeling the thickness distribution of Arctic sea ice /

Lipscomb, William H. January 1998 (has links)
Thesis (Ph. D.)--University of Washington, 1998. / Vita. Includes bibliographical references (leaves [145]-152).
18

Structural-optical relationships in first-year sea ice /

Light, Bonnie. January 2000 (has links)
Thesis (Ph. D.)--University of Washington, 2000. / Vita. Includes bibliographical references (leaves 147-153).
19

Constitutive modeling of ice rubble in first-year ridge keel /

Heinonen, Jaakko. January 1900 (has links) (PDF)
Thesis (doctoral)--Helsinki University of Technology, 2004. / Includes bibliographical references (p. 136-142). Also available on the World Wide Web.
20

Measurements of electromagnetic wave velocity in the East Antarctic ice sheet

Clough, John Wendell, January 1970 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1970. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

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