Now showing items 6593-6612 of 14895

    • The graying of America and outdoor recreation planning: Providing accessible outdoor recreation for older persons

      Wilkin, Donovan C.; Strader, Linda Marie, 1955- (The University of Arizona., 1994)
      As baby boomers age, the population of the United States moves toward a higher proportion of elderly than ever before. These seniors retire earlier, have more discretionary income, active lifestyles and education. They also have a growing interest in fitness--challenging future outdoor recreation planning. Providers of public outdoor recreation, including the U.S.D.A. Forest Service, are under pressure to accommodate all population groups--including seniors. An emerging problem for recreation planners is how to address the special needs generated by this important demographic shift. To explore this issue, the author studied the retirement community Green Valley, Arizona's influence on the Forest Service's Madera Canyon Recreation Area. The study identified Madera Canyon as a model for successful recreation planning by enlisting volunteers, encouraging user participation, providing trails with different experiences, benches, wildlife viewing, and educational opportunities in natural areas, to meet senior's needs. The author provides planning guidelines.
    • Great gardens of the world: Preferences and perceptions

      Zube, Ervin H.; Miller, Jennifer Wellington, 1957- (The University of Arizona., 1987)
      Professors of landscape architectural history of North America (domestic) and the rest of the world (international) were surveyed about the ten historic and five contemporary (since 1930) gardens they considered outstanding and to explain why. Additionally, ten comprehensive volumes of garden history were analyzed for their preferences. There was a 74% response rate to the domestic survey and 51.5% to the international survey. Over half of the respondents agreed on ten historic gardens. There was 31.2% agreement on five contemporary gardens. The literature is Eurocentric. Asia, Australia and modern gardens are described infrequently. No volume covered all the "great gardens." The survey results and literature characterize gardens similarly. Key elements or themes are described. Educational background may affect responses. Similar surveys of Asians and non-experts are recommended. Understanding the important themes will aid in better landscape planning and design.
    • Great kivas as integrative architecture in the Silver Creek community, Arizona

      Mills, Barbara J.; Herr, Sarah Alice, 1970- (The University of Arizona., 1994)
      This thesis explores the relationship between circular great kiva sites in the Silver Creek area and counterparts in regions across the Southwest. Great kivas, as communal architecture, are important in community integration. Exploring their distribution through the variables of time, space and form helps us understand change in community integration. The patterns in the temporal and spatial distribution of the Silver Creek great kivas correspond to the patterning of these variables in the Upper Little Colorado region. The majority of Silver Creek great kivas appear in a period of westward population movement after A.D. 1000. The Silver Creek great kivas, do not, however, show the same range of formal variation. Since many of the changes in the Upper Little Colorado area are described as resolving problems of increasing population and aggregation, lower population densities in the Silver Creek area may explain the reduced formal variability of its great kivas.
    • Green Building Practices Among Production Home Builders

      Zimmerman, Benjamin Neil (The University of Arizona., 2007)
      Residential green building is gaining increased attention around the United States. Interviews with five production home builders from different markets in the western United States explore green building practices among production builders. Examination of what production builders are doing that is considered green, motivations for building green and advantages of green homes helps to inform planners of measures that can be taken to encourage the growth of green building in home construction.
    • GREENHOUSE LETTUCE YIELDS AND ENERGY CONSUMPTION UNDER LIGHT SELECTIVE PLASTIC FILMS.

      Martinez, Jaime Reynaldo, 1956- (The University of Arizona., 1985)
    • Greenhouse studies for diagnosis of sugarbeet nutrition problems

      Satti, Mohamed Ahmed Eisa (The University of Arizona., 1980)
    • Grievance expression between coworkers: Reliability and validity of a measurement scale

      Morrill, Calvin; King, Cheryl Denise, 1964- (The University of Arizona., 1988)
      This study reports the development of the Grievance Expression Scale (GES), a self-report measurement instrument of how organizational members express objections or complaints that they have about one another's behavior. The GES focuses on grievance expression as a precursor to conflict, and was developed in response to a lack of focus in current conflict instruments on conflict communication behavior and the influence of situational variables on that behavior. Additionally, the scale was derived from an interdisciplinary theoretical base, incorporating organizational conflict management research in communication, management, anthropology, and sociology. Four forms of the GES were administered to 830 currently employed adults waiting for jury duty and attending a city street fair. A four-factor scale was found, consisting of third party, confrontation, toleration, and discipline factors. Reliability, content, discriminant, and construct validity of the GES were supported. Further development should include tests of theory utilizing the GES.
    • Ground and surface water assessments supporting instream flow protection at the Hassayampa River Preserve, Wickenburg, Arizona

      Davis, Stanley N.; Jenkins, Michael Edward, 1961- (The University of Arizona., 1989)
      The Arizona Nature Conservancy's Hassayampa River Preserve is 50 miles northwest of Phoenix near the town of Wickenburg. Four miles of the largely ephemeral Hassayampa River are perennial within the preserve, supporting one of the finest remaining cottonwood-willow forests in the state. Stream flows are affected by wells pumping ground water directly from the alluvial aquifer and may be influenced by wells which intercept lateral inflow from the regional basin-fill aquifer. Developing effective management strategies to protect base flow conditions (∼4 cfs) depends on a clear understanding of the surface and ground-water systems in the preserve. Provided that ground water developers near Wickenburg recognize and incorporate the interconnected nature of each hydrologic system, perennial flow within the preserve is not believed to be immediately threatened. (Abstract shortened with permission of author.)
    • Ground penetrating radar investigations with applications for Southern Arizona

      Sternberg, Ben K.; McGill, James William, 1959- (The University of Arizona., 1990)
      The goal of Ground Penetrating Radar (GPR) research at the University of Arizona is to improve our understanding use of GPR in a variety of settings. Observations from local surveys will form the basis for developing continuous profiling systems for future terrestrial and extraterrestrial applications. Determining electrical properties of in-situ soils and rock helps predict GPR behavior. A test site was constructed to measure the electrical properties of representative Southern Arizona Basin soils and to quantify the GPR response to these properties. In general, 100 and 300 MHz antennas are useful for surveys designed to locate large anomalies. The higher resolution of the 500 MHz antenna is valuable in most investigations and has been successful in mapping archaeological sites in the region. Signal processing of digitized GPR data clarifies the profile for interpretation and conditions the data for remote interpretation of the GPR profile through neural network pattern recognition of anomalies.
    • Ground stone technology in the Silver Creek area, east-central Arizona

      Mills, Barbara J.; Valado, Martha Trenna (The University of Arizona., 1999)
      This analysis of nearly 1500 ground stone tools collected during five years of excavation in the Silver Creek area of East-Central Arizona is aimed at addressing four research goals: (1) raw material selection; (2) occupational histories; (3) the organization of labor and intensity of production; and (4) migration. Four excavated sites span the time period from A.D. 1050 to 1330. These research domains are investigated by examining technological change and variation in use-wear in the ground stone assemblage. Evidence suggests that although raw material selection was generally consistent throughout this period, there were significant changes in the use of ground stone tools. These changes are especially pronounced in grinding equipment and pottery polishing stones, possibly representing changes in the organization of subsistence and craft production. A comparative approach to assessing the possibility of Kayenta Anasazi migration to the area is also presented.
    • GROUND VIBRATIONS CAUSED BY SURFACE MINE BLASTING.

      Shoop, Sally Annette. (The University of Arizona., 1982)
    • Ground water appraisal of the Gash River basin at Kassala, Kassala Province, Sudan.

      Saeed, El Tayeb Mohamed,1939-; Wright, Jerome J.; Pye, Willard D. (The University of Arizona., 1968)
      The Cash River basin lies in the eastern part of Kassala Province, Sudan. The rock units in the area are the Basement Complex, Clays of the Plain, and the alluvial deposits of the Gash River. The average annual precipitation is 13,4 inches. The mean seasonal runoff of the Gash River at Kassala town is about 381,000 acre-feet, and the mean average period of flow is 88 days per year. The principal aquifer in the area is the alluvium. The aquifer is unconfined, and the average saturated thickness is 90 feet. The average transmissivity of the aquifer is 100,000 gallons per day/foot and the average specific yield is 13 per cent, The storage capacity of the ground water reservoir is about 484,000 acre-feet, The annual discharge from the reservoir for irrigation, domestic uses, and evapotranspiration is about 58,000 acre-feet, The aquifer is recharged seasonally from the Gash River during the rainy season by influent seepage and from direct precipitation over the basin, The ground water supplies of the area have small amounts of dissolved solids, The ground water is of an excellent quality for irrigation and domestic purposes.
    • Ground water evaluation and cooling before utilization for Wadi Zam-Zam, Libya

      Jarroud, Omar Ali,1946-; Evans, Daniel D.; DeCook, K. James; Ince, Simon (The University of Arizona., 1977)
      Agricultural development through irrigation is a major effort in Libya. One of the areas being developed is the Wadi Zam-Zam. The Zam-Zam project water supply is entirely deep ground water with essentially no local recharge. The supply aquifer is artesian with an average pressure head of 65 m above land surface and a temperature of 56°C. The water must be cooled before application to crops. In order to maintain sufficient pressure to keep a constant supply, the number of wells and discharge must be limited. Other ground water aquifers may be developed to supply an additional resource to fulfill agricultural needs. Water quality analysis indicates that corrosion should not be a problem other than perhaps steady corrosion when the wells are closed. Considering the total dissolved solids and other criteria, water quality can be classified as good for irrigation. Water temperatures can be lowered by cooling ponds or cooling towers. An unlined cooling pond is less expensive than a cooling tower, but requires higher water consumption. Therefore, based on design assumptions, a mechanical draught tower may be considered more efficient than a cooling pond.
    • A ground water model of the Williams Lake watershed Hubbard County, Minnesota

      Karls, Robert Michael.; Neuman, Shlomo P. (The University of Arizona., 1982)
      Two-dimensional ground-water models were used to simulate groundwater flow in the Williams Lake watershed. The models were used to estimate the seepage rates to and from Williams Lake, and to determine model sensitivity to several parameters governing the flow systems. The models are based on a two-dimensional, block-centered, finite-difference scheme. A steady-state model was developed for a period in early July 1979, and this model provided initial conditions for a transient simulation through June 1981. The results of the modeling and sensitivity analysis showed that the model is most sensitive to the thickness, and hydraulic conductivity of the lake bottom sediments.
    • Ground Water Pollution Assessment of Landfills in the Rio Nuevo Area, Tucson, Arizona.

      Korich, Dee Ann.; Wilson, L. Graham; Lansey, Kevin; Ferre, Ty (The University of Arizona., 2001)
      A protocol for evaluating the leachate generating potential and subsequent ground water pollution of landfills located in the desert southwest, along ephemeral streams, was tested at four landfills in the Rio Nuevo Project area, Tucson, Arizona. The landfills involved were the "A" Mountain, Rio Nuevo South, Nearmont, and Rio Nuevo North landfills. Six regional ground water monitor wells were installed as part of this study. Existing shallow monitor wells were also sampled. Concentrations of chloride, total dissolved solids (TDS), nitrate-nitrogen, and organics, and values of specific conductance (EC) were the indicators used for contaminated ground water. Using these indicators, it was determined that the Rio Nuevo North Landfill is a source of ground water contamination. Leachate is also being generated in the perched ground water under the Rio Nuevo South and Nearmont landfills, but the regional ground water quality there is so far unaffected. Low levels of organic contaminants were noted across the study area. The source of water for leachate generation at the Rio Nuevo North Landfill was not determined, but a likely source at the Rio Nuevo South Landfill was determined to be major runoff events in the Santa Cruz River. The protocol presented in this thesis was found to be sufficient for determining that leachate was present. However, it was not sufficient for determining the source of water infiltrating the landfills.