381 dogs between 4 and 18 months of age were tested for the presence of antibodies to Coccidioides one time. Dogs were reported as either healthy or sick by the referring veterinarian. Owners were asked to complete a questionnaire regarding their dog's risk factors associated with exposure to Coccidioides at the time of sample collection.

Valley development through erosional processes typically tends to create symmetrical valleys. Over time, water cuts through the substrate to create valleys, gorges, and canyons for which the sides are the valley are evenly sloped. However, there are anomalies to this process. Asymmetrical valleys have been well-documented even in areas of uniform substrate or little tectonic uplift. One proposed explanation for the asymmetry of these valleys is differential insolation. This may lead to different microclimates from one slope to another which alter the rate and extent of erosion. Since the differences in received insolation vary with latitude (especially in streams that flow along an east/west axis), it follows that the degree of asymmetry should also vary with latitude if differential insolation is a primary driving factor in the development of these valleys. To evaluate if insolation plays a role in the development of asymmetrical valleys, this study examines variability in asymmetry across 447 valleys in nine study areas located at different latitudes. The degree of asymmetry for each valley was measured by using 30 meter resolution digital elevation models (DEMs) to determine the slope angle of each side of the valley. Asymmetry was measured by computing a ratio of the average slope angle for each side of the valley (larger value divided by smaller). If the resulting value is one, the valley is deemed symmetrical. As the value increases, the degree of asymmetry increases. This investigation found that contrary to expectations, valleys at lower latitudes tend to have a higher degree of asymmetry than those at higher latitudes, which suggests that differential insolation does not play a major role in the development of these valleys. Instead, this study found that high altitudes and low latitudes are more frequently associated with a higher degree of asymmetry. These unexpected findings open the door to new avenues of investigation into the causes of asymmetrical valley development.

Estimation of seepage was done in 39 selected reaches of 11 irrigation canals in the Logan and Blacksmith Fork Irrigation Systems of Cache Valley, Utah. The measurements were performed from June to October, 2008, which includes part of the irrigation season for these canals. The inflow-outflow method was used to measure seepage, in which area and velocities were measured under steady flow conditions. Velocity measurements were done with an acoustic flow meter and the mean velocity was determined using the reduced-point method (velocity measurements at 0.2, 0.6 and or 0.8 of the depth from the water surface). As a result, reaches with the highest seepage losses were identified. Gaining streams, losing streams, and gaining-losing streams were also identified. Spatial variation was observed along each canal in which a descending trend of the mean seepage loss was found in the downstream direction. Additionally, spatial variation was found between canals, the reaches located in the east part of Logan city presented higher seepage losses than reaches on the west side of the city. Temporal variations were identified by a monthly comparison of seepage losses within reaches which indicated higher seepage losses during late July and August of 2008. Additionally, this report presents comments about the performance of the FlowTracker® ADV® in the present project.

This thesis discusses the history of the Tennessee Valley Authority as a regional planning project.

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Graduation date: 1999

Thesis (Ph. D.)--University of Washington, 2000. / Vita. Includes bibliographical references (leaves 300-324).

Block 71, the location of this design thesis, is within the Comox Valley, British Columbia, Canada. Situated on Vancouver Island and four kilometers North of the City of Courtenay. The site is 925 acres of cut-block, used for lumber, and owned by Raven Forest Products. Raven Forest Products clear-cut the site as recently as the late 1970's. Second growth has been allowed to persist on the site. In 1994, a development permit for a proposed village was submitted to the Regional District of Comox-Strathcona and is still pending. This proposed village was named 'View Ridge' and was intended to create higher densities and preserve more open space than convention subdivisions. The relevant proposed design for this property, View Ridge Revisited, endeavours to meet and surpass the intentions of the its predecessor. The View Ridge Revisited proposal allows for a minimum of eight hundred dwelling units and a maximum of one thousand and one hundred. Sustainability is the ultimate goal for View Ridge Revisited. The three parts of this goal are economic sustainability, social sustainability and ecological sustainability. As a template for the structure of the village, Transit-Oriented Developments and the principles of New Urbanism were employed. Economically, the proposed design should support a community of approximately two thousand two hundred persons. Seven hundred of these should be employed within the community itself. Appropriate retail, office and service-office space has been provided for this purpose. This assumes at least one job per household. At least seventy-five percent of all the housing units in the village are within one thousand-three hundred feet walking distance from the downtown commercial core, or a five minute walk. These two thousand and two hundred people will live in medium density (12 du/acre) and low-density (8 du/acre) areas. The latter housing type includes ancillary suites above lane-access-only garages. The higher density housing types should be at least three stories, with possible basement suites. All housing should meet some type of precedent typology. The most likely typology sources come from older parts of Courtenay and Comox. Adequate recreation space is provided for the residents. Approximately twenty acres are located adjacent to the Recreation Centre and the Schools. The schools should be adequate for the given population of the community. Additional green space is included throughout the site, in the form of neighbourhood parks. Ten percent of each block is designated to park space. These parks will also function as storm water channels and filtration areas. From an ecological perspective, the design proposal attempts to integrate the functioning, natural environment with the cultural processes of its human co-inhabitants. In general, the village is centred upon a sixty to eighty meter riparian corridor, a wetland area and a community forest. All of these features should maintain their ecological functions, as well as provide vital components to both the image of the community and its healthy existence. The riparian corridor is a diverted stream from Seal Bay Park. It should be engineered to follow its pre-logging path down into the Little River watershed Storm water is drained from the village into this stream, after being naturally treated within the previously mentioned wetland area. All water from the site is treated in this manner. Sewage is treated at a three acre solar aquatic treatment facility next to the commercial core. The community forest will allow a habitat connection to the riparian corridor as well as provide an educational component to the inhabitants. It is hoped that sustainable logging practices will become a part of this forest's character. The overall goal of sustainable community design is met at View Ridge Revisited by satisfying the economic, social and ecological requirements. The transit-oriented design of this village provides the template upon which this becomes possible.

No description available.

This study compares the soils, floristic composition, phytosociological structure and history of seven Brazilian savannas in the Amazon basin: those at Alter do Chao, Amapa, Roraima and SE Humaita are islands in rain forest; and those at Chapada dos Parecis, Redencao, and Carolina are on the periphery (northern border) of the central Brazilian savannas (the so-called 'cerrado'). A total of 26 transects were sampled by the PCQ method (for trees with dbh greater than or equal to 5 cm) and additional tree species were recorded by 'wide patrolling'. A total of 101 species were recorded from the transects and another 43 species were recorded by 'wide patrolling'. Byrsonima crassifolia, B. coccolobifolia, Curatella americana, Salvertia convallariodora and Plathymenia reticulata occurred in most or all sites, but no species occurred in all transects. The number of species in the isolated savannas decreased with the distance from the central Brazilian core savanna area. Both cluster analysis (based on the S0rensen Similarity Index) and ordination (DCA), showed that the disjunct and non-isolated peripheral areas were in floristically distinct groups. Five surface soil samples (0 - 10 cm) were collected from each of the 26 transects. Two soil cores (up to 4 m depth), one located in the savanna and the other from the nearest forest present, were taken from each study site for carbon isotope analysis. All the sites had acidic soils (pH 4.5 - 5.2) and a wide range of concentrations of aluminium (0.12 - 1.49 meq 100g-1); most of the other soil properties varied significantly within study sites. An ordination (PCA) distinguished the soils from Amapa, Alter do Chao, Redencao and Roraima, but did not distinguish the disjunct sites from non-isolated peripheral ones. The soil delta 13C values of all the disjunct savannas indicated a vegetation change in the past from C3 to C4 plants, showing that forest (or at least a vegetation with few C4 plants) formely covered these sites. 14C dating indicated that the disjunct savannas are of relatively recent origin, e.g. Humaita was dated at about 2,000 years BP, and hence that they are not remnants of a more widespread Pleistocene savanna in the Amazon.