The Fremont, a Formative culture located in the Eastern Great Basin and Colorado Plateau, have been primarily studied from an ecological perspective. This research addresses issues that are not ecological, the organization of production and exchange of ceramic vessels. Following criteria suggested by Brown et al. (1990), I argue that the following need to be addressed prior to a useful discussion of intergroup trade: the source of the raw materials of the exchanged objects, the associated pattern of distribution, the relative value of the objects, and their context of manufacture, use, and consumption. I specifically address three of these issues regarding the Snake Valley pottery series, asking what is the source of Snake Valley Black-on-gray pottery, what is the distribution of Snake Valley Gray, Snake Valley Black-on-gray, and Snake Valley Corrugated, and in what context was Snake Valley Black-on-gray manufactured? These questions are approached via two data sets -- a chemical assay and a distributional analysis. I argue that Snake Valley pottery was probably produced in a restricted area, the Parowan Valley, and that production was organized as community craft specialization, though I acknowledge that more research on this topic is ultimately required.

Digitized by Kansas Correctional Industries

No description available.

Graduation date: 1961

Relationships among the surface wind, horizontal synoptic-scale pressure gradient and topography are studied in the Willamette Valley in western Oregon. Terrain features alter the standard surface wind-pressure gradient relationship such that the angle between the surface wind and the surface geostrophic wind is most frequently 60°. In winter the surface flow is predominantly southerly and surface geostrophic flow varies from southerly to westerly. Little diurnal change occurs in the average surface wind, the average surface geostrophic wind and their relationship with each other because the air in the valley is generally stably stratified throughout the day. Partially in response to the northward extension of the subtropical anticyclone summertime surface winds and surface geostrophic winds are northerly, except during afternoon episodes of marine air invasion when surface winds are westerly. The pressure gradient is 88% less intense in summer but the ratio of the magnitudes of the surface wind and surface geostrophic wind, R, is 125% greater than in winter. However, a sharp summertime morning maximum in R of -0.67 is diminished by early afternoon as differential surface heating establishes a strong afternoon pressure gradient. When the surface geostrophic wind vector is cross-valley, the surface wind is still most frequently parallel to the valley and the surface geostrophic wind speed is largest and most variable. Because of the importance of terrain and meso-scale events, little correlation between the surface winds and synoptic-scale pressure gradient is found. / Graduation date: 1975

Every tight gas well needs to be stimulated with a hydraulic fracture treatment to produce natural gas at economic flow rates and recover a volume of gas that provides an acceptable return on investment. Over the past few decades, many different types of fracture fluids, propping agents and treatment sizes have been tried in the Cotton Valley formation. The treatment design engineer has to choose the optimum fluid, optimum proppant, optimum treatment size and make sure the optimum treatment is mixed and pumped in the field. These optimum values also depend on drilling costs, fracturing costs and other economic parameters; such as gas prices, operating costs and taxes. Using information from the petroleum literature, numerical and analytical simulators, and statistical analysis of production data, this research provides a detailed economic evaluation of the Cotton Valley wells drilled in the Elm Grove field operated by Matador Resources to determine not only the optimum treatment type, but also the optimum treatment volume as a function of drilling costs, completion costs, operating costs and gas prices. This work also provides an evaluation of well performance as a function of the fracture treatment type by reviewing production data from the Carthage and Oak Hill Cotton Valley fields in Texas and the Elm Grove field in Louisiana.

<p>The aim of this project is to characterise novel psychrotrophic actinomycetes isolated from Antarctic Dry Valley soils and to isolate and characterize secondary metabolites produced by these actinomycetes.</p>

<p>The overall aim of this project was to establish whether there is a long-term decline of rainfall collected in rainfall gauges within the Jonkershoek Valley that have the longest and best quality records.</p>

Every tight gas well needs to be stimulated with a hydraulic fracture treatment to produce natural gas at economic flow rates and recover a volume of gas that provides an acceptable return on investment. Over the past few decades, many different types of fracture fluids, propping agents and treatment sizes have been tried in the Cotton Valley formation. The treatment design engineer has to choose the optimum fluid, optimum proppant, optimum treatment size and make sure the optimum treatment is mixed and pumped in the field. These optimum values also depend on drilling costs, fracturing costs and other economic parameters; such as gas prices, operating costs and taxes. Using information from the petroleum literature, numerical and analytical simulators, and statistical analysis of production data, this research provides a detailed economic evaluation of the Cotton Valley wells drilled in the Elm Grove field operated by Matador Resources to determine not only the optimum treatment type, but also the optimum treatment volume as a function of drilling costs, completion costs, operating costs and gas prices. This work also provides an evaluation of well performance as a function of the fracture treatment type by reviewing production data from the Carthage and Oak Hill Cotton Valley fields in Texas and the Elm Grove field in Louisiana.

Thesis--University of Chicago. / Bibliography: p. 158-164.