Sökning: "David Lindgren"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden David Lindgren.

1. 1. Optical Characterization of III-Nitride and II-V Semiconductor Nanowires

   Författare :David Lindgren; Fasta tillståndets fysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; III-Nitride; III-V; Fysicumarkivet A:2014:Lindgren; Semiconductor; Nanowire; Photoluminescence; Cathodoluminescence;

   Sammanfattning : The optical properties of III-V semiconductor nanowires for optical devices have been investigated by photoluminescence spectroscopy, cathodoluminescence spectroscopy and cathodoluminescence imaging. The material systems that have been studied include the nitrides (InN, GaN and AlN) and ternaries, and a few common phosphides and arsenides. LÄS MER

3. 2. MOLECULAR PROFILING OF UROTHELIAL CARCINOMA

   Författare :David Lindgren; Avdelningen för klinisk genetik; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; cytogenetik; Urology; nephrology; Urologi; nefrologi; Clinical genetics; Klinisk genetik; cytogenetics; Genetics; cancer; onkologi; Cytologi; cancerology; oncology; Cytology; TP53; FGFR3; gene expression profiling; microarray; bladder cancer; urothelial carcinoma; Genetik;

   Sammanfattning : The general aim of this thesis was to molecularly characterize urothelial carcinoma (UC) at the transcriptional level using gene expression microarrays to improve the classification and pathogenetic understanding of this disease. In the first two studies (Articles I and II), gene expression profiling was used to study dysregulated transcriptional networks in a large cohort of UCs. LÄS MER

4. 3. Projection Techniques for Classification and Identification

   Författare :David Lindgren; Lennart Ljung; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : It is very well understood how to evaluate and find, in different senses, optimal linear projections of measurements on linear systems. The solution to the linear least squares problem, the principal component analysis and partial least squares are all examples of well known techniques that work very well as long as the dependencies in data are fairly linear. LÄS MER

5. 4. Subspace Selection Techniques for Classification Problems

   Författare :David Lindgren; Lennart Ljung; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Linear subspaces for regression; Asymetric classification; Subspace parameterization; Clustered regression analysis;

   Sammanfattning : The main topic of this thesis is linear subspaces for regression - how to find the subspaces and how to evaluate them. The motivation to do regression in a subspace is numerical as well as computational - numerical in the sense that the subspace can filter out the relevant components or features of the problem, computationally in the sense that this filtering can be done quickly and then can nonlinear predictionby artificial neural networks, for instance, be conducted in lower dimensionality. LÄS MER

7. 5. Optimizing experimental radioimmunotherapy : investigating the different mechanisms behind radiation induced cell deaths

   Författare :Theres Lindgren; David Eriksson; Torgny Stigbrand; Bo Stenerlöw; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; mitotic catastrophe; senescence; cell cycle checkpoint; apoptosis; radiation; gene expression; p53; immunologi; Immunology; radiofysik; radiation physics;

   Sammanfattning : Background. Radiation therapy is an important treatment regimen for malignant disease. Radiation therapy uses ionizing radiation to induce DNA damage in tumor cells in order to kill them. LÄS MER