Sökning: "differential coding"

Visar resultat 21 - 25 av 46 avhandlingar innehållade orden differential coding.

  1. 21. Fiber-Optic Systems with Coherent Detection and Four-Dimensional Modulation

    Författare :Martin E Sjödin; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; intradyne; polarization-switched QPSK; quadrature phase-shift keying QPSK ; coherent detection; self-homodyne; wavelength-division multiplexing; 16-ary quadrature amplitude modulation; self-phase modulation; 128-SP-QAM; polarization multiplexing; pilot tone;

    Sammanfattning : To increase the data rates of fiber-optic communication systems, modulation formats withhigher spectral efficiency and/or higher power efficiency than binary formats are of greatinterest. These formats require coherent detection and this thesis has been dedicated toinvestigating both novel modulation formats and two different types of coherent systems. LÄS MER

  3. 22. Exploring the genomic and transcriptomic landscape of immune cells in multiple sclerosis : towards better biomarkers, diagnosis and treatment

    Författare :Sunjay Jude Fernandes; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The overall aim of this thesis was to determine the changes in gene regulation taking place in immune cells during the course of Multiple Sclerosis. Over 200 MS-associated SNPs have been identified from GWAS studies. LÄS MER

  4. 23. Molecular evolutionary studies of genome degradation in bacteria

    Författare :Jan O. Andersson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; molekylärbiologi; Molecular Biology;

    Sammanfattning : The genus Rickettsia belongs to the α-proteobacteria and consists of obligate intracellular bacteria, which often are pathogenic for humans. All Rickettsia have small genomes, highly adapted to an intracellular lifestyle. LÄS MER

  5. 24. Regional differences in the response of neural stem cells and their microenvironment to ionizing radiation

    Författare :Nina Hellström; Göteborgs universitet; []
    Nyckelord :ionizing radiation; neurogenesis; neural stem cells; inflammation; microglia; stem cell niche; trophic support;

    Sammanfattning : Radiation therapy is one of the most effective tools for treating malignant tumors; however, cranial irradiation often results in intellectual impairment and cognitive deficits, such as impaired learning and memory. Ionizing radiation generates DNA damage, causing proliferative cells to undergo apoptosis. LÄS MER

  7. 25. Genome wide analysis of the Ssn6-Tup11/Tup12 co-repressor complex in the fission yeast Schizosaccharomyces pombe

    Författare :Fredrik Fagerström-Billai; Anthony Ph Wright; Karl Ekwall; Hans Ronne; Södertörns högskola; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In this study, we have investigated the fission yeast Ssn6-Tup11 /Tup 12 transcriptional corepressor which is involved in regulation of many genes important for a wide variety of processes. In contrast to the well characterised budding yeast Tup1 protein there are two paralogous proteins present in fission yeast, namely Tup11 and Tup12. LÄS MER