Now showing items 14710-14729 of 14977

    • Visual interpretation of vegetation classes from airborne videography: An evaluation of observer proficiency with minimal training

      McPherson, Guy R.; Drake, Samuel Edward, 1960- (The University of Arizona., 1993)
      This study evaluated the ability of individual subjects and small groups to correctly identify Arizona plant communities from color airvideo footage, explored the relationship of five background variables to subjects' success, and determined which community types were easiest and most difficult for subjects to identify. Forty-six volunteers from the University of Arizona School of Renewable Natural Resources participated in a multiple-choice pretest-posttest experiment using 30 different plant communities depicted in one-minute segments of videotape. Three hours of training increased mean individual score from 7 correct (pretest) to 21 correct (posttest), and mean group score from 11 to 24. All respondents significantly improved their performance, regardless of background. Posttest results showed no significant difference in ability among individuals or between individuals and groups. The most difficult community to identify was creosote-tarbush desertscrub; the easiest was paloverde-saguaro desertscrub. Findings support the feasibility of video interpretation by minimally-trained personnel.
    • The visual motor Gestalt test as a measure of intelligence and personality variation

      Gaylord, Helen Cook, 1915- (The University of Arizona., 1955)
    • Visual purple: A context for cultural understanding through the visual arts

      Parezo, Nancy; Leaman, Bethany Marie (The University of Arizona., 1994)
      Visual Purple is based on the author's experience with the Old Pasqua Youth Artists (OPYA) which is a biweekly, after-school program for Yaqui youth ranging from five to fifteen years of age. The paper seeks to relate the primary experiences of seeing and drawing linking them to cultural concepts, socialization patterns, and community setting. The Yaqui children's perceptual understanding acquired through learning and development co-varies with their cultural environment and upbringing. Through a content analysis of the OPYA artwork with special attention paid to the children's interactions, she contends that this understanding manifests as a set of aesthetic principles, the knowledge of core cultural symbols, and shared interpersonal behaviors based on cooperation, watching, and learning. The data suggests that the rich symbolism of Yaqui culture aesthetically socializes the children giving them an eye for detail and the ability to pick up and readily relay visual concepts.
    • Visual Quality Metrics Resulting from Dynamic Corneal Tear Film Topography

      Greivenkamp, John; Solem, Cameron Cole; Greivenkamp, John; Schwiegerling, Jim; Liang, Rongguang (The University of Arizona., 2017)
      The visual quality effects from the dynamic behavior of the tear film have been determined through measurements acquired with a high resolution Twyman-Green interferometer. The base shape of the eye has been removed to isolate the aberrations induced by the tear film. The measured tear film was then combined with a typical human eye model to simulate visual performance. Fourier theory has been implemented to calculate the incoherent point spread function, the modulation transfer function, and the subjective quality factor for this system. Analysis software has been developed for ease of automation for large data sets, and outputs movies have been made that display these visual quality metrics alongside the tear film. Post processing software was written to identify and eliminate bad frames. As a whole, this software creates the potential for increased intuition about the connection between blinks, tear film dynamics and visual quality.
    • Visualization of the flow of fluid within a centrifugal pump

      Linka, James Edward, 1929- (The University of Arizona., 1965)
    • The visualizing of a corporate image for a new business

      Wade, Sydney Jean, 1937- (The University of Arizona., 1961)
    • Vitalizing high school physics

      Hyde, Jay, 1889- (The University of Arizona., 1939)
    • Vitamin A requirement of the hatchling sea turtle, Chelonia mydas

      Patterson, Jill Irene, 1950- (The University of Arizona., 1974)
    • Vitamin content of human milk

      King, Pin, 1947- (The University of Arizona., 1972)
    • Vitamin E turnover in cultured pulmonary alveolar macrophages

      Liebler, Daniel C.; Hoeger, Glenn Charles, 1962- (The University of Arizona., 1992)
      Vitamin E (α-TH), the primary lipid soluble antioxidant, can protect tissues from oxidative insult. Oxidant-producing pulmonary alveolar macrophages (PAM), may depend on α-TH to prevent oxidative damage. α-TH levels in cultured PAM declined rapidly during the first 12-18 hours in culture. Approximately 60% of the decrease was detected as unoxidized alpha-TH released to RPMI 1640 (containing 5% fetal bovine serum (FBS)) culture medium. α-TH was not detected in serum-free Ham's F12 medium. PAM appeared to reabsorb α-TH from the medium. PAM activation with phorbol myristate acetate (PMA) did not affect cellular α-TH depletion. However, the amount of α-TH detected in the medium of PMA treated cultures was only 50% of that detected in medium from untreated controls. Inhibition of superoxide production with iodoacetate had no effect on cellular depletion kinetics, however medium α-TH levels were still 50% of controls. Inhibition of nitric oxide, synthesis appeared to have no effect on α-TH status.
    • A vocabulary for the teaching of Spanish in elementary schools

      Clements, Harriet Eloise, 1897- (The University of Arizona., 1941)
    • Vocabulary instruction: Teacher perceptions and classroom observations

      Anders, Patricia L.; Bos, Candace S.; Miller, Susan Frances, 1962- (The University of Arizona., 1987)
      This study investigates the relationships between theory-based vocabulary research (Anderson and Freebody, 1981; Mezynski, 1983), teacher perceptions of the effectiveness and usability of twelve vocabulary strategies on a researcher-developed survey, and observations in content area classrooms during vocabulary instruction. Among the findings, the following are major: (1) Each hypothesis offers differing instructional implications for vocabulary instruction; (2) the responses on the survey indicate that strategies implied by the Knowledge Hypothesis are the most effective and strategies implied by the Instrumental Hypothesis are the most usable; (3) observations of five teachers indicate that observed behaviors, reported practices, and personal reports are inconsistent; and (4) triangulation of the three data sources reveals some consistency and some contradictions. Implications for future research, teacher education and practice are discussed.
    • The vocabulary of junior high school students

      Allhands, Tyler, 1905- (The University of Arizona., 1938)

      Gustafson, Donna Carol Winn. (The University of Arizona., 1982)

      Goldwasser, Sharon (The University of Arizona., 1987)
    • Vocal music for the seventh and eighth grade boys

      McGirr, Cencil Elmer, 1910- (The University of Arizona., 1947)
    • Vocal repertoire of the cactus wren (Campylorhynchus brunneicapillus)

      Wolford, Martha Jean, 1942- (The University of Arizona., 1969)