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 10 of 10 for “"horsetail"”.
-
Post-Glacial Fire History of Horsetail Fen and Human-Environment Interactions in the Teanaway Area of the Eastern Cascades, Washington
… post-glacial fire history of a wetland known as Horsetail Fen, located in the Teanaway area of the eastern Cascades of Washington State. The goal was to evaluate how fire activity has varied under different climatic scenarios during the last ~16,000 years and in relation to human land-use …
-
Effective Formulations of Optimization Under Uncertainty for Aerospace Design
… sum), a second novel formulation is proposed—horsetail matching. This formulation can make use of gradient- based local optimizers, so is useful for later stages of the design process when exploitation of a region of design space is important. Additionally, horsetail matching extends …
-
Depositional Environments of Siliceous Laminites in the Laney Member of the Green River Formation, Sublette County, Wyoming
… of Knightia (Herring-type fish) and Equisetum (horsetail), Astephus (catfish), Amyzon (sucker ) and (3) presence of dolomite and aragonite.</p> <p>The excellent preservation of these mineral-organic laminites and the fossils they contain (Knightia, Astephus, and Amyzon) in shallow-water, …
-
Environmental Impacts of Tin Mine Waste: A Case Study of the Zaaiplaats Tin Mine, Limpopo Province, South Africa
… it is thus polluted. A plant commonly known as horsetail (Equisetum ramosissimum) was collected during dry and wet season for comparison purposes. A total of 9 plant samples were collected, prepared and analysed using Atomic Absorption Spectrometry. Bioaccumulation factor of these plant samples …
-
INVESTIGATING THE IMPACT OF ROCK BRIDGES ON THE MECHANICAL BEHAVIOR OF JOINTED ROCK MASS USING LATTICE SPRING-BASED SYNTHETIC ROCK MASS (LS-SRM) APPROACH
… thickness was 4.0 mm and above. The shear band horsetail formations were efficiently simulated using the LS-SRM approach, with results matching very well with natural phenomena. Slopes with non-persistent joints are producing smaller and shallower mobilizing zones compared to slopes with fully …
-
The effects of fault-induced stress anisotropy on fracturing, folding and sill emplacement: Insights from the Bowie coal mines, southern Piceance basin, western Colorado.
… form blocks resembling balls or eggs and (2) horsetail cleats, striated surfaces that superficially resemble shattercones and result from shear failure in coal. Numerical models created with the boundary element program Poly3D were used to estimate the magnitudes and orientations of the …
-
Wildlife Habitat Evaluation of the Unchannelized Missouri River in South Dakota
… with grasses, forbs, sedges (Carex spp.), or horsetail (Equisetum spp.), forming a system of edges. The total habitat value for cottonwood-willow communities was 7.5; big game and upland game birds found conditions excellent there. Elm-oak habitat was comprised of a wide variety of trees; the …
-
Characterisation of silica in Equisetum hyemale and its transformation into biomorphous ceramics
Equisetum spp. (horsetail / “Schachtelhalm”) is the only surviving genus of the primitive Sphenopsids vascular plants which reached their zenith during the Carboniferous era. It is an herbaceous plant and is distinguished by jointed stems with fused whorl of nodal leaves. The plant has been used …
-
The tectonic evolution of the western Tien Shan
… basin and enabling exhumation of the linked horsetail splays. Higher depositional rates (~150 m Myr-1) in the Oligo-Miocene section (Massaget Fm.) of the Fergana basin suggest synchronous deformation in the surrounding ranges. The central Alai Range also experienced rapid cooling around this …
-
Biosynthese, Akkumulation und Strukturen von Styrylpyronen in gametophytischen und sporophytischen Geweben von Equisetum
Untersuchungen zur Akkumulation phenolischer Inhaltsstoffe von Equisetum an gametophytischen und unterirdisch wachsenden sporophytischen Geweben vervollständigten den Kenntnisstand der phenolischen Inhaltsstoffe in dieser Gattung. In beiden Geweben konnten – wie in oberirdischen sporophytischen …