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 112 for “"chalk"”.
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Swan-plant interactions in a chalk river catchment.
… interaction: the grazing of plants in chalk river catchments, principally the submerged macrophyte water crowfoot (Ranunculus penicillatus ssp. pseudofluitans (Syne) S.D. Webster) and terrestrial pasture grass species, by flocks of non-breeding mute swans (Cygnus olor Gmelin, 1789). …
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Investigations of rapid groundwater flow and karst in the Chalk
… distribution of rapid groundwater flow in the Chalk and evaluates the degree of karstification. A survey of surface karst features revealed a clear spatial pattern in their distribution with three distinctive geomorphological zones. Stream sinks and dolines occur frequently in Zone 1 where …
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Going beyond chalk to pixels : the manipulations of a technochick
This didactic CD-ROM is designed for art educators and artists who have yet to use a computer as a means for creating digital imagery. Through its multimedia interaction, users will be encouraged to try new methods and procedures for creating in a digital environment by manipulating an image from a …
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The magnetostratigraphy of Coniacian-Late Campanian chalk sequences of Southern England
… to early Late Campanian and consist of white chalk with flints. Hand samples and large volume rock cores have been collected. Both thermal and AF demagnetisation have been used to remove magnetic overprints. Measurements have been carried out using a CCL 'discrete sample' and a 2-G 'wholecore' …
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Evaluating the natural attenuation of synthetic organic chemicals in a chalk aquifer
… (IPU) and sulphanilamide (SULPH) in a chalk aquifer and assesses in-situ biodegradation by: (a) analysing historical monitoring data to identify and support biodegradation processes at the contaminated field site; (b) the development of in-situ microcosm approaches, (c) determining the …
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Shallow Depths: Reproductions of Nuclear Landscapes and Anomalies of Consent at Chalk River
… for a Near Surface Disposal Facility (NSDF) in Chalk River, Ontario. I attended public hearings and community meetings as part of close empirical work documenting opposition to the proposed NSDF. In this dissertation, I demonstrate how opposition, and Indigenous refusal in particular, is …
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Algal resource depression by macro-invertebrate herbivores in a chalk stream: An empirical approach
… a diverse herbivore guild were investigated in a chalk stream, using mesocosms to determine the distribution of algal-herbivore interaction strengths. A series of experiments were used to assess: herbivore link strength distribution; context-dependency of interaction strength; the relationship of …
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THE EFFECT OF MAGNESIUM CARBONATE (CHALK) ON GEOMETRIC ENTROPY, FORCE AND EMG DURING ROCK CLIMBING
… rock. Rock climbers turn to magnesium carbonate (chalk) to combat this problem even though little scientific evidence supports its use. Rock climbers believe that chalk dries the hands of sweat and improves the coefficient of friction between the hands and the surface of the rock …
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Surfactant-free Aluminum Silicate-based Nanofluids for Enhanced Oil Recovery from Austin Chalk Carbonate Reservoirs
… efficiency to alter the wettability of Austin Chalk carbonate rocks from oil-wet to strongly water-wet. Characterization techniques, such as SEM, BET, XRD, DLS, and Z-potential were conducted on the synthesized nanoparticles to confirm their surface identity, functionality, stability, and …
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Computer as chalk : cultivating and sustaining communities of youth as designers of tangible user interfaces
… I argue that the ways in which people use chalk (e.g., drawing hopscotch grids) can serve as an inspiration for rethinking how people can harness the expressive power of computational technologies. Today's computing devices have the potential to enhance expressive activities for diverse …
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Geochemical characterization and subsurface flow path evaluation of mine drainage sources in the Chalk Creek district, Colorado
Includes bibliographical references (pages 41-43).
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Diagenesis of the B chalk, B marl, and Fort Hays member of the Niobrara Formation, Denver Basin, Colorado
A diagenetic assessment of the B chalk, B marl and Fort Hays Member of the Niobrara Formation, in eight cores and one outcrop sample, revealed that progressive diagenetic alteration occurred with increasing burial depth and increasing temperatures. Cathodoluminescence petrography, scanning electron …
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Organic-walled microplankton biostratigraphy and paleoecology of the Maastrichtian Prairie Bluff Chalk formation of central and western Alabama
… of the Maastrichian Prairie Bluff Chalk is documented. A total of 69 dinoflagellate species were identified in the Prairie Bluff Chalk. Samples were studied from three sites in central and western Alabama (Tombigbee River, Millers Ferry, and Braggs). Also included were several …
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Formulation and Implementation of a Constitutive Model for Soft Rock
… mechanical behavior and mechanical properties of chalk. Chalk behavior is characterized by elastoplasticity, including pore collapse, shear failure, and tensile failure mechanisms; rate-dependence; and pore fluid dependence. The research described in this dissertation was performed with the …
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New evidence for complex mosasaur paleobiology: oxygen isotopes in enamel reveal habitat variation of clidastes from the Mooreville Chalk, Alabama
… propython individual from the Mooreville Chalk in Pickens County, Alabama. The isotopic record is then compared with the previously studied Platecarpus ictericus mosasaurs from the time-equivalent Kansas Niobrara Chalk of the Western Interior Seaway. Phosphate oxygen isotope records from …
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