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.
Results
Showing 1 to 20 of 212 for “"Transition zone"”.
-
Seismic Studies of the Mantle Transition Zone
For the continental collision zone, I show that due to high VP near the bottom of the mantle transition zone, the contrast in VP across the 660-km discontinuity beneath central Tibet is small (around 3.1%): only about 70% of that beneath the northern Indian shield. This sub-horizontal anomaly of …
-
Seismic imaging of the mantle transition zone
… seismo-stratigraphy of the upper mantle transition zone. The generalized Radon transform (GRT) is based on the single scattering approximation and maps singularities (reflections) in broad-band data into singularities (reflectors/scatters) in the medium. It is able to detect and …
-
Modeling carbon sequestration in transition zone to optimize storage potential
… CO₂ in a shallow region segregates into two zones according to CO₂ phases within the initial reservoir pressure and the maximum bottom hole pressure: gas zone and transition zone. Transition zone is a better option because of favorable CO₂ properties. This work investigated the CO₂ storage …
-
Receiver function imaging of mantle transition zone discontinuities beneath Alaska
… processes, yet many aspects of subduction zone geodynamics remain unsolved and poorly understood, such as the depth extent of the subducted slab and its geometry. The Alaska subduction zone, which is associated with the subduction of the Pacific Plate beneath the North America plate, has a …
-
Modeling Nutrient and Plankton Processes in the California Coastal Transition Zone
… have been developed for the California Coastal Transition Zone (CTZ) region with the overall objective of understanding and quantifying the processes th at contribute to the spatial and temporal development of nutrient and plankton distributions in the CTZ. The first of these models considers …
-
Managing Stress Tolerance on Warm-Season Putting Greens in the Transition Zone
<p>The use of warm-season putting greens in the transition zone has increased in recent years. Ultradwarf bermudagrass (Cynodon dactylon (L.) Pers x C. transvaalensis Burtt-Davy) is the most prevalent warm-season putting green selection in the transition zone, however, newly developed greens-type …
-
Effect of Surface Moisture Condition on Substrate-Repair Concrete Overlay Transition Zone
… of substrate moisture condition on the overlay transition zone (OTZ) of the substrate-repair concrete. The substrate moisture condition can significantly impact the microstructure characterization of the OTZ. If the substrate is too dry, then it may absorb water from the repair material, …
-
Structural geometry of the frontal Ouachitas-Arkoma basin transition zone in Western Arkansas
… basin is accommodated by the Wilburton Triangle Zone in the footwall of the Choctaw Fault of Oklahoma; however, few studies document the geometry of Ouachita-Arkoma transition zone in Arkansas. This study uses depth-converted 2-D seismic reflection profiles and well log data to clarify the …
-
Mafic volcanism in the Colorado Plateau/Basin-and-Range Transition Zone, Hurricane, Utah
… field in the Colorado Plateau/Basin & Range Transition Zone located in the eastern part of the St. George basin in southwestern Utah. Strombolian-Hawaiian style eruptions produced thin (10 m) a'a lava flows and cinder (scoria) cones composed of vesicular basalt, bombs and agglutinate. …
-
Bats and the city : urban bat biodiversity in a tropical biome transition zone
Urbanisation is an important factor in global land-use change which dramatically alters habitats at great detriment to wildlife. Our understanding of urban biodiversity patterns and their driving factors in tropical cities which interact with high levels of biodiversity is limited, yet it is …
-
Interfacial transition zone composition and bonding in cementitious materials with asphalt-coated particles
… out by principally studying the interfacial transition zone (ITZ) and the interfacial bond energies between asphalt (RAP) and cement paste. Studies of the ITZ were performed using Euclidean distance mapping and image analysis of compositional backscatter electron micrographs of polished …
-
Probing the Mantle Transition Zone beneath the Central Pacific Region Using PP Precursors
The mantle transition zone (MTZ) of the Earth is bounded by globally observed discontinuities at depths of about 410 and 660 km, which are mainly attributed to the spinel and post-spinel phase transitions of olivine. The temperature-pressure relationships of phase transitions at the …
-
The Effects Of Exercise On Capillary Supply To The 'transition Zone' Of Infarcted Rat Hearts
… the developing necrosis (those in the border or 'transition' zone) are thought to be viable but potentially ischemic. The long-term (> 24 hour) fate of these fibers is not known. My objective was to determine whether a transition zone is present in an animal model of chronic myocardial infarction. …
-
Single-crystal elasticity of Al-rich phases in the Earth’s transition zone and lower mantle
… form at conditions compatible with the Earth’s transition zone and lower mantle have been determined in this study by combining X-ray diffraction and Brillouin scattering. In particular majoritic-garnet solid solutions and the NAL (new aluminium phase) phase have been studied. The combination of …
-
Normal Fault Trace-Length Scaling in a Tectonic Transition Zone in Southern Sedna Planitia, Venus
… to 343° longitude where smooth, lowland plains transition into highland regions which are broken by basin and range style tectonics. The fault trace-lengths are plotted on a cumulative number verses length plot (CNL) and fit with a power function, exponential function, and logarithmic function …
-
Evaluation of tall fescue-zoysiagrass polystands and new zoysiagrass genotypes for use in the transition zone
… and large patch resistance are needed in the transition zone. Tall fescue (Schedonorus arundinaceus Schreb), a C3 grass, is used frequently in Kansas due to its heat and drought tolerance compared to some other C3 grasses. However, brown patch (Rhizoctonia solani) is the main disease limiting …
-
Grassland and Woodland Bird Occurrence and Habitat Selection in the Prairie-Forest Transition Zone of Minnesota
… 14 counties in southeastern Minnesota in the transition zone between forested and prairie ecoregions. Little information is available relative to which birds are using grassland or woodland habitat within the WMD and how their presence or absence is related to the available habitat conditions. …
-
Receiver function investigations of mantle transition zone and crustal structure in East Africa and Northeast Asia
… of the crust, upper mantle, and the mantle transition zone (MTZ) are still controversial. The MTZ discontinuities beneath the study area are imaged by stacking an unprecedented volume of receiver functions (RFs). The normal MTZ thickness beneath the Western Branch of the EARS and Tanzania …
-
The Sheeted Dyke-Gabbro Transition Zone: the Key to Unravelling the Palaeomagnetic Record of the Oman Ophiolite
… processes operating above a nascent subduction zone. It formed in the Late Cretaceous by supra-subduction zone spreading and shortly afterwards was emplaced onto the Arabian continental margin. Twelve massifs in the ophiolite expose complete sections of the Neotethyan oceanic lithosphere, …
Page 1 of 11