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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.
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Showing 401 to 410 of 10689 (0.047 seconds)| 401 |
Time Resolved Micro Photoluminescence of InGaN/GaN Quantum DotsEriksson, Martin January 2011 (has links)
Time resolved micro photoluminescence of InGaN/GaN quantum dots has been investigated, together with power dependence and polarization measurements. The quantum dots are formed at the top of selectively grown GaN pyramids on a 4H-SiC substrate. Decay time constants in the range of 400 ps to 1.1 ns have been observed with a pulsed 267 nm laser with an average power of 20 μW, and no correlation between emission energy and lifetime has been observed. Strong and sharp emission peaks show mono-exponential or close to mono-exponential decay curves and the smaller and/or broader peaks show multi-exponential decays. Different directions of polarization have been observed for two groups of emission peaks, separated by 60°, which fits the six fold symmetry of the pyramids well. Small differences in power dependence and carrier lifetimes have also been observed when comparing these two groups of emission peaks. Selectively grown InGaN/GaN quantum dots can be used for emitters and sensors with customizable wavelength, sharp line width and quick response times in the ultraviolet, blue, and green regions of the electromagnetic spectrum.
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Byggtekniska brister i ett radhusområde Förslag på lösningar vid ombyggnad / Construction deficiencies in a terrace house area Suggestions of reconstruction solutionsNorén, Ylva January 2010 (has links)
No description available.
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Ljudisoleringsegenskaper hos fönsterkonstruktionerDahlman, Anders, Bengtsson, Björn January 1980 (has links)
QC 20110616
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| 404 |
An innovative ground storageLazzarotto, Alberto January 2008 (has links)
No description available.
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| 405 |
Energieffektivisering av stenstadshusen - genom byggnadstekniska energisparåtgärder / Reduction of the energy consumption in old apartment buildings – by constructional measuresGhofranifar, Jamasb January 2008 (has links)
No description available.
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Fuktrisker i kallvindsutrymmen - problem och förbättringsmetoder / Moisture in attics – risk analysis and methods for improvementNilsson, Peter January 2009 (has links)
No description available.
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| 407 |
Värmeledningsförmåga hos betong / Thermal conductivity of concreteEl Mohr, Nagwa January 2009 (has links)
No description available.
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| 408 |
Energy storage systems: an approach involving the concept of exergyBellù, Alberto January 2009 (has links)
No description available.
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| 409 |
Invallningsmodeller för petroleumcisterner / Secondary containment models for petroleum tanksSellerholm, Paul January 2010 (has links)
No description available.
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| 410 |
Taklösningar för kallvindar : - En studie av kallvindar för småhus med passivhusstandard samt evaluering av en taklösning för en kallvindKarppinen, Hansi January 2010 (has links)
No description available.
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