Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 370 for “"Aberrations"”.
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POLARIZATION ABERRATIONS
Polarization aberrations are the variations of amplitude, phase, polarization and retardance associated with ray paths through optical systems. This dissertation develops methods for calculating the polarization aberrations of radially symmetric systems of weak polarizers, systems like lenses, …
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Minimizing electron optical aberrations
… effect and increase throughput. Among various aberrations, the field curvature is of the most importance due to its dominant contribution to the blur size for the image at the edge of an subfield in the SCALPEL projection system [3). Due to this limit, the simultaneous exposure area on the mask …
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Gravitational Lensing and Telescope Aberrations
… images by misaligned telescopes. As telescope aberrations will generally interfere with lensing measurements, it is important to be able to quantify and ultimately minimize them. The conclusions of this first part are (1) misaligned telescopes produce the same aberration shapes, but different …
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Harvest practices cause aberrations in pork quality
Consumers are often confused and reluctant to purchase products from fresh retail meat counters that exhibit significant color variations. This hesitation to purchase results in annual profit loss to the pork industry. Processes to minimize color variation remain a major focus of the industry and …
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Genomic Characterization of Recurrent Chromosomal Aberrations in Retinoblastoma
… thus far has implicated several cytogenetic aberrations in this sequence of molecular events, the two most recurrent and notable being the augmented copy number status of KIF14 and MDM4 on 1q and of DEK and E2F3 on 6p. A small subset of retinoblastoma exhibits high-level amplification of the …
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Human subtelomeric aberrations in the Hong Kong population
… for up to 40-50% of these cases. Subtelomeric aberrations constitute an important subset of chromosomal disorders which have been increasingly recognised in recent years. The reported detection rate for subtelomeric aberrations in idiopathic moderate-severe ID is approximately 3.6%. The types …
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Elucidating TRPA1 Ion Channel Aberrations in Oesophageal Adenocarcinoma.
Oesophageal adenocarcinoma (OAC) is the 14th most common cancer, accounting for 5% of cancer mortalities in the UK. The genomic landscape of OAC is driven by structural variations and is characterised by high mutation burden. Although recurrent mutations are observed in only few genes, we have …
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Chromosome aberrations in field strains of Blattella germanica
… cockroach were compared for possible chromosome aberrations. Resistant strain females produced significantly higher numbers of aberrant oothecae ( >5 unhatched eggs ) than the susceptible strains. Chromosome aberrations found in the susceptible strains were attachments (autosome-autosome, …
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Chromatin Architecture Aberrations Contribute and Acute Lymphoblastic Leukemia Relapse
Cancer results from aberrations at the molecular level that enable biological hallmarks. These aberrations can be found within the chromatin architecture of cancer cells that includes the genome, molecular modifications to the genome, and the three-dimensional organization of the chromatin fiber. …
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Tomographic Reconstruction of Wavefront Aberrations using Multiple Laser Guide Stars
Tomographic reconstruction using multiple laser guide stars (MLGS) will be required by the next generation of extremely large (30 m class) telescopes (ELT). Modal decomposition of wavefront phase using Zernike polynomials is a widely used technique in adaptive optics (AO) research. However, this …
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A Reflector Antenna Corrected for Spherical, Coma, and Chromatic Aberrations
Made available in DSpace on 2014-12-10T19:06:44Z (GMT). No. of bitstreams: 1 7121200.pdf: 4113603 bytes, checksum: 574e2ce2f80af0867718d49876bdda73 (MD5) Previous issue date: 1971
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Characterisation of genetic and epigenetic aberrations in paediatric high grade glioma
Paediatric high grade glioma (HGG), including diffuse intrinsic pontine glioma (DIPG) are highly aggressive tumours with no effective cures. Lack of understanding of the molecular biology of these tumours, in part due to lack of well-characterised pre-clinical models, is a great challenge in the …
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Brain functional connectivity and its aberrations in mouse models of autism
… elusive origin and significance of connectional aberrations observed in autism and recent progress towards this goal.
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Characterizing Chromosomal Aberrations in Cells Deficient for Both ATM and MSH2
… metaphase spreads were examined for chromosomal aberrations in B cells, which undergo genetically programmed DNA recombination and mutation. To bypass the lethality in <em>ATM<sup>-/-</sup>MSH2<sup>-/-</sup> </em>mice, a conditional knockout of ATM was bred onto an <em>MSH2<sup>-/-</sup></em> …
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Driver genes associated to Broad Copy Number Aberrations in solid cancers
Large numerical and structural chromosomal aberrations (aneuploidy) are intrinsic features of tumour cells and cell transformation. The chromosomal aberrations are collectively called Broad Copy Number Aberrations (BCNAs) and mainly include aneuploidy (i.e. an incorrect number of one or more …
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The role of viral sequences in genetic aberrations and malignant transformation
Cancer is a leading cause of death worldwide and viral infections such as HBV/HCV and HPV have been known to be responsible for up to 20% of cancers in low- and middle-income countries. Approximately 500,000 of these deaths are due to oesophageal squamous cell carcinoma (OSSC) alone, one of the …
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