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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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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.
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Showing 321 to 330 of 3513 (0.038 seconds)Spelling suggestions: "subject:"fysik."" "subject:"musik.""
| 321 |
Ab Initio based Multi-ScaleSimulations of OxideDispersion StrengthenedSteelsClaisse, Antoine January 2012 (has links)
No description available.
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| 322 |
Influence of selective proton exchange on periodically poled lithium niobateManzo, Michele January 2010 (has links)
The purpose of the present thesis is to study the influence of Proton Exchange on Electric Field assisted Poling of congruent Lithium Niobate and its applications on periodically patterned structures. Moreover, the possibility of using Proton Exchange to avoid neighbours domains merging is studied and successfully demonstrated for period shorter than 10μm.Before approaching the poling of periodically patterned LiNbO3 samples, the main characteristics of the evolution of the poling of uniform samples in different masking conditions are investigated. It is well known that the kinetics of domains switching is highly dependent on the poling setup and on the quality/type of electrode employed to contact the crystal to the high voltage. We used a thin layer of Titanium both as mask for proton diffusion and as metal electrode for poling experiments. Moreover different masking configurations are pre-sented and characterized.The second part of this work deals with the periodic poling of 0.5mm-thick congruent lithium niobate. 9x4 mm2 1-D Ti gratings with 8.66μm and 8.03μm period were first fabricated on the +z side of the crystal and a superficial chemical pattern was reproduced via acid bath. Three different types of samples were obtained and before the poling the metallic mask was removed whereas in one configuration it was left assuring better homogeneity of the inverted areas.The results we obtained suggest it could be possible to achieve periodically poled congruent lithium niobate gratings with period shorter than 4μm in ~500μm thick samples and hence obtain aspect ratios of more than 250.
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| 323 |
Investigation of the Sputtering Process of an Optically Selective SurfaceAhlsten, Rebecka January 2011 (has links)
No description available.
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| 324 |
Dose planning from MRI using machine learning for automatic segmentation of skull and airSjölund, Jens January 2012 (has links)
No description available.
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| 325 |
Adressning Off-Site Consequence Criteria Using Level 3 Probabilistic Safety AssessmentCaldwell, Andrew January 2012 (has links)
No description available.
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| 326 |
The reliability of GABA measurements in the human brain using MRS at 3TVoevodskaya, Olga January 2012 (has links)
No description available.
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| 327 |
Running of Neutrino Parameters in Extra DimensionsRiad, Stella January 2012 (has links)
No description available.
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| 328 |
Experimental and Analytical Investigation of Particulate Debris SpreadingBasso, Simone January 2011 (has links)
No description available.
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| 329 |
Radiative Neutrino Mass Generation and Renormalization Group Running in the Ma-ModelBouchand, Romain January 2012 (has links)
No description available.
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| 330 |
Statistical ion distribution functions from the IMA sensor on Venus ExpressNordström, Terese January 2011 (has links)
No description available.
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