Now showing items 3776-3795 of 15079

    • Dose rate measurements in the cobalt-60 gamma irradiation facility using thermoluminescent dosimeters

      Ganapol, Barry D.; Quinn, Bruce David, 1955- (The University of Arizona., 1991)
      A dose rate measurement survey was performed at various locations inside the radiation chamber of the Cobalt-60 gamma irradiation facility located in Room 130, Building 20 at the University of Arizona. TLDs were used for the dose rate measurements. It was observed that the dose rates decrease rapidly with increasing distance from the source. Also, dose rates decreased with increased distance away from the centerline of the radiation chamber which is indicative of the position of the effective center of the source. Percent dose rates with respect to the dose rate of the calibration position were tabulated.
    • The double bind technique in Adlerian family counseling

      Coequyt, Gloria Marie (The University of Arizona., 1980)
    • Double cropping in semi-arid regions using water harvesting agrosystems

      Rands, Barry Christopher.; Flug, Marshall (The University of Arizona., 1980)
      Recognizing the need for water efficient food production systems in semi-arid regions of the world, a Desert Strip Farming system (a method of water harvesting) was designed and constructed at Page Ranch to determine the feasibility of double cropping at that location. Crops grown during two consecutive winters offered only limited data due to animal problems, but the intervening summer crop of sorghum demonstrated the potential of the system with significant yields on less than 150 millimeters of rainfall. A detailed account of the design and construction of the system is included, as well as guidelines for determining the applicability of such a system to other semi-arid regions of the world. Five specific locations are outlined as examples of regions that could support double cropped agriculture using water harvesting agrosystems.
    • The double keyboard concertos of Carl Philipp Emanuel Bach

      Waterman, Muriel Moore, 1923- (The University of Arizona., 1970)
    • Double-Skin Façade for Energy Performance and Thermal Comfort in Hot/Humid Climate Highrise Office Buildings

      Chalfoun, Nader; Alkindi, Aisha Saeed; Youssef, Omar; Moeller, Colby (The University of Arizona., 2019)
      Dubai is one of the hot-humid regions characteristic with lots of high-rises buildings that consume lots of energy. In 2010 Dubai was mentioned as one of the cities with the biggest ecological footprint in the world and since that Dubai started to introduce green building evaluation systems and building codes to reach sustainability and reduce energy consumption. The commercial sector in Dubai consumes around 47.52% of the energy and 30% of this energy in the commercial building is used for a conventional cooling system. The question is can we generate a building-integrated system that will generate energy and achieve human thermal comfort without relying on conventional systems to cool the building? According to research building performance save half of the energy from natural ventilation applications. Natural ventilation is considered one important strategy that uses the unlimited resource of wind. The unlimited source in Dubai city is 8.5mph throughout the year. This research will introduce a new system called breathing in the wind system that stop the dependency on the conventional cooling system and let the building be more breathable by developing a double-skin façade that uses the wind power, solar power, maintain views, use natural ventilation to reach the human thermal comfort in the space and shading. Natural ventilation will be used all year round by applying two modes that depend on the availability of wind in Dubai city. In addition, develop methods of using software for natural ventilation analysis in buildings such as eQuest Energy Simulation, and physical modeling.

      Hsiao, Kuo-Sheng. (The University of Arizona., 1984)
    • Downward Continuation of Bouguer Gravity Anomalies and Residual Aeromagnetic Anomalies by Means of Finite Differences

      Arenson, John Dean; Sturgul, J. R.; Sumner, J. S.; Norton, D. D.; Arenson, John Dean (The University of Arizona., 1975)
      The depths to buried bodies, characterized by anomalous gravity and magnetic properties, are determined by a combination of two numerical techniques. An upward continuation integral is solved by a method by Paul and Nagy using elemental squares and low order polynomials to describe the behavior of the gravity or magnetic data between observed data points. Downward continuation of the magnetic or gravity data is done by a finite difference technique as described by Bullard and Cooper. The applicability of the techniques are determined by comparison to depths determined by other means over the same anomalies and by comparison to various rule-of-thumb methods prevalent in the geophysical literature. The relative speed and cost of the particular computer system used is also considered in the applicability. The results show that although the initial costs of the computer program are high, the combined technique is as good as and at times better than the rule-of-thumb methods in determining the depth to the anomaly-causing body and is useful when more than just an approximate depth is of interest.

      Kaufman, Dov Bruno. (The University of Arizona., 1983)
    • The drama resource person: a position in Tucson Public Schools, District One

      Frakes, Jack Dean, 1927- (The University of Arizona., 1972)
    • The dramatic criticism of Edgar Allan Poe

      Ward, Janice Lea, 1941- (The University of Arizona., 1966)
    • The dramatic protagonists of Antonio Buero Vallejo

      Kauffman, Peggy Jane, 1942- (The University of Arizona., 1966)
    • Drawings of the human body by selected handicapped children

      Brown, Cynthia Ann, 1938- (The University of Arizona., 1972)
    • Dreams in Homer, Heraclitus, and Plato

      Park, Arum; Novikova, Aleksandra; Groves, Robert; Friesen, Courtney (The University of Arizona., 2018)
      My thesis examines the connection between dreams, knowledge, and perception in the works of Homer, Heraclitus and Plato. Although the perception is not a topic thoroughly discussed in the Iliad and the Odyssey, Homeric view on dreams will serve as a basis for comparison with Heraclitus and Plato. In Homer, dreams are generally messages from a supernatural force imparting some divine knowledge to the sleeper in order to fulfill their own will. As a reaction to the traditionally accepted views of the epics, Heraclitus asserts that dreams, because they are created by specific individuals and are cut off from the shared world fire, are a poor source of the true logos, true knowledge. Furthermore, Plato expands upon Heraclitus’ idea by stating that dreaming is a form of perception that is too unstable to be able to provide true knowledge. By exploring how people perceive dreams while asleep, we can get a better understanding of the sort of knowledge that is obtained in dreams.
    • Dried citrus pulp as a feed for dairy cattle in Arizona

      Harland, Frederick Gordon, 1917- (The University of Arizona., 1952)

      Otu, Sunday Ekum. (The University of Arizona., 1984)
    • The drift velocity of low energy electrons in pure gases and gas mixtures

      Levine, Norman Edward, 1938- (The University of Arizona., 1963)