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 194 for “"Inversions"”.
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Corporate Inversions and Long-Run Performance
… performance of firms that undergo corporate inversions. The results show that the market response to the initial inversion announcement differs based on the type of inversion. Merger & Acquisition (M&A) and restructuring inversions are perceived positively by the market, but naked inversions …
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Density-to-Potential Inversions in Density Functional Theory
… to given input densities. The results of these inversions may then be used to evaluate the quality of different density functional approximations and guide the design of new approximations. The inversion methods use classical gradient-based optimization routines that are constrained to satisfy …
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Exploding the edge : inversions into the urban landscape
… The building and the open space are inversions of each other while referencing the district around them, the cultural landscape. As a result, the form of the built urban context has the potential to define the urban edge along which everyday activity occurs while providing a place of …
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Rule of the Fewer: Electoral Inversions and their Consequences
… of my dissertation. More precisely, electoral inversions occur when the party (or coalition of parties) that wins the most votes nevertheless loses the election. While scholars have long recognized that electoral inversions can and sometimes do occur, especially with respect to the U.S. …
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Genetic structure and inversions in the Lake Malawi cichlid radiation
… used to detect five large polymorphic inversions that segregate within the most species-rich and ecologically diverse lineage of Malawi cichlids. As strong suppressors of recombination, these inversions take up a dual role: they sometimes function as sex determination systems while they …
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Chromosomal inversions as a mechanism for sympatric differentiation in common quails
Chromosomal inversions are key drivers of phenotypic divergence, local adaptation and early reproductive isolation, but their effects in highly mobile species remain poorly understood. In the common quail Coturnix coturnix, a large inversion on chromosome 1 spans about 12% of the genome and defines …
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Chromosomal inversions and common quail diversification in Macaronesian archipelagos and the mainland
… we focus on the role of chromosomal inversions in maintaining polymorphisms within the highly mobile common quail (Coturnix coturnix), and the impact these structural changes have on the population fragmentation, species diversification and on its genome evolution. Since the …
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Polytopes, generating functions, and new statistics related to descents and inversions in permutations
… By looking at the number of alternating inversions in alternating (down-up) permutations, we obtain a new qanalog of the Euler number En and show how it emerges in a q-analog of an identity expressing E, as a weighted sum of Dyck paths. Other parts of this thesis are devoted to polytopes …
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The tectonics and three-dimensional structure of spreading centers : microearthquake studies and tomographic inversions
… the presentation of the results of tomographic inversions of synthetic data generated for a model of the axial magma chamber postulated to exist beneath the East Pacific Rise. These inversions demonstrate the power of the tomographic method for imaging three-dimensional structure on a scale …
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The tectonics and three-dimensional structure of spreading centers--microearthquake studies and tomographic inversions
… the presentation of the results of tomographic inversions of synthetic data generated for a model of the axial magma chamber postulated to exist beneath the East Pacific Rise. These inversions demonstrate the power of the tomographic method for imaging three-dimensional structure on a scale …
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Investigation of the Influence of Temperature Inversions and Turbulence on Land-atmosphere Interactions for Rolling Terrain
… depression to isolate nighttime temperature inversions. This thesis presents observations of momentum, sensible heat, moisture, and CO2 fluxes from data collected at a sampling frequency of 10Hz at four heights. Results show a strong correlation between temperature inversions and CO2 flux. …
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Necessary conditions for geo-acoustic parameter inversions to become asymptotically unbiased and attain the Cramer-Rao Lower Bound
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2002.
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S-wave velocity structure beneath the Kaapvaal Craton from surface-wave inversions compared with estimates from mantle xenoliths
Results from two-station surface-wave inversions across the Archean Kaapvaal craton of southern Africa are compared with seismic velocities estimated from approximately 100 mantle xenoliths brought to the surface in kimberlite pipes. As the xenoliths represent a snapshot of the mantle at the time …
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Analysis of Chromosomal Rearrangements in Host Specific Salmonella Serovars
… in recombination frequency, ability to tolerate inversions, or rate of inversion at rrn operons in either generalist or host-specific serovar of Salmonella enterica. Analysis of inversions at rrn operons suggests that both generalist and host-specific serovars undergo inversions at a rare …
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Extreme chromosomal differentiation in the Goodeid fish genus Ilyodon
… differing by at least 6 fixed pericentric inversions were found. Hybrids between the two cytotypes produced in the laboratory were found to be fertile, indicating there is little or no heterozygote disadvantage associated with these inversions. Models depending primarily on drift and …
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The variability of the marine atmospheric boundary layer in the Greenland Sea marginal ice zone a case study.
… in deep, moist layers capped by high weak inversions at the MIZ. Off-ice flow resulted in multiple surface and elevated inversions, with specific humidity highest within an elevated lower-tropospheric layer and dry regions near the surface and aloft. Parallel flow led to the development of …
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Comparative genomics of chromosomal rearrangements in malaria mosquitoes
… the evolutionary dynamics of chromosomal inversions, a physical map for an Asian malaria vector, Anopheles stephensi, was created and compared with the maps of the major African malaria vectors A. gambiae and A. funestus No interchromosomal transposition was observed between A. gambiae and …
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Air quality and climate change in the greater Cape Town area
… Greater Cape Town Area (GCTA), where temperature inversions lead to high air pollutant concentrations and episodes of air pollution. As local meteorological conditions are often manifestations of larger weather producing phenomena (e.g. anticyclones), the work presented studies the changes that …
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Observations on Convexity
… but are not limited to the hulls determined by inversions, shift inversions, and Mobius transformations. A convex hull must be preceded by the set of functions involved. These hulls are the smallest convex sets that contain the original set. Justifications and precise definitions are included …
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