Now showing items 13670-13689 of 19159

    • OAI-PMH: A TOOL FOR METADATA HARVESTING AND FEDERATED SEARCH

      Dipen, Deka (INFLIBNET, 2007)
      This paper focuses on the importance of OAI-PMH in the aspect of accessibility to the digital repositories. The basic structure of OAI-PMH and its functional elements are given along with some existing metadata harvester services of India. The paper discusses about the PKP Harvester software and its users. Concludes that OAI-PMH is an effective solution of the problem of lack of interoperability.
    • Oat and Barley Variety Tests

      Cluff, Ronald C.; Parsons, David K.; Dennis, Robert E. (College of Agriculture, University of Arizona (Tucson, AZ), 1978-09)
    • Oat Hay Variety Evaluation

      Harper, John; Ottman, Mike (College of Agriculture, University of Arizona (Tucson, AZ), 1987-09)
    • Oat Hay Variety Yield Comparisons, Coolidge

      Harper, John; Voigt, Robert; Ottman, Michael; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1985-09)
    • Oat Varieties Grown for Grain and Forage Production at the Safford Agricultural Center, 1988

      Clark, L. J.; Carpenter, E. W.; Ottman, Mike (College of Agriculture, University of Arizona (Tucson, AZ), 1988-09)
      Eleven oat varieties were tested for grain and forage yields at the Safford Agricultural Center. Cayuse, the predominant variety grown in the area was the top producer of total dry matter. Four other varieties had higher grain yields than Cayuse.
    • Oat Variety Grain and Forage Yield Trials at the Maricopa Agricultural Center 1989

      Sheedy, M.; Ottman, M.; Ramage, T.; Ottman, Michael; Kingdon, Lorraine (College of Agriculture, University of Arizona (Tucson, AZ), 1989-09)
    • Oat Variety Grain and Forage Yield Trials at the Maricopa Agricultural Center, 1990

      Sheedy, M.; Ottman, M.; Ramage, T.; Ottman, Michael; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-09)
      Twelve oat varieties (9 hulled and 3 hull-less) were yield tested for both forage and grain production at the Maricopa Agricultural Center during the '89-90 growing season. Highest forage producing varieties were generally later maturing - Cayuse and Stampede; while lower yields were produced by early maturing varieties - Montezuma and Palestine. Highest grain yields were produced by Swan and FMC400.
    • Oat Variety Trial in Cochise County, 1988

      Clark, L. J.; Schwennesen, E.; Ottman, Mike (College of Agriculture, University of Arizona (Tucson, AZ), 1988-09)
      Ten varieties of oats were grown in a trial to test grain yield. Five of the varieties produced more than 4,000 pounds per acre; the top - yielding variety, Ogle, from Minnesota, produced 4,578 pounds per acre. Difficulties in establishing a perfect stand with the small plot grain drill would probably mean that a farmer could expect yields higher than these when using full -sized equipment. Considering the premium for oats, oats for grain could be a viable alternative crop.
    • OB Stars Near the Supernova Remnant RCW 86

      Westerlund, B. E.; Univ Arizona, Steward Observ (Steward Observatory, The University of Arizona (Tucson, Arizona), 1969-05)
      The filamentary nebula RCW 86, identical with the non - thermal radio source MSH 14 - 63, is part of a supernova remnant. A group of OB stars is found near the radio source. The distance of the group is 2500 pc; this agrees well with the radio distance of the remnant. It is suggested that the remnant was formed by the explosion of a member of the group; the explosion occurred probably in 185 A. D.
    • Object Category Formation in 4.5 Month-Old Infants

      Bishop, Keri Elizabeth (The University of Arizona., 2011-05)
    • Object Recognition and Classification

      Johnson, Taylor Christine (The University of Arizona., 2012-05)
      Object recognition and classification is a common problem facing computers. There are many shortcomings in proper identification of an object when it comes to computer algorithms. A very common process used to deal with classification problems is neural networks. Neural networks are modelled after the human brain and the neuron _rings that occur when an individual looks at an image and identifies the objects in it. In this work we propose a probabilistic neural network that takes into account the regional properties of an image of either an ant or an egg as determined by edge segmentation and an extraction of geometric features specific to the object. To do this the algorithm calculates the regional properties of a black and white representation of the object and then gives these properties to the probabilistic neural network which calculates the probability of the object being an ant or an egg.
    • An Objective Methodology to Quantify Motor Skills in Basic Orthopaedic and Gynecologic Surgical Tasks

      Sharer, Sarah Kennedy; The University of Arizona College of Medicine - Phoenix; Kahol, Kanav (The University of Arizona., 2011-02)
      This study is the initial step in the development of a basic skills simulator for surgical residents, intended to serve as a cross-platform objective motor skills training system. A robust system was developed to measure motor skills of orthopaedic surgeons and gynecologic surgeons. The orthopaedic study focused on three basic skills: drill, tap, and screw insertion. Each of the participants repeated the sequential task of drill, tap, screw insertion ten times in cadaveric femoral diaphyseal bone. The gynecologic study focused on placement of sutures across ten incisions in synthetic skin. Real time wrist, hand, and finger position was recorded bilaterally using Immersion CyberGloves® and the Ascension Liberty Tracker®. Four metrics were evaluated: task duration, gesture proficiency, hand movement smoothness (replaced by subjective rating in Gyn study), and number of errors, in order to differentiate between groups with different skill levels: No Skills, Limited Skills, Advanced Skills, and Expert Skills. The results demonstrated a significant difference between the Expert Skills group and the less skilled groups. In both studies the Expert Skills group completed the tasks the fastest, with the greatest proficiency, smoothness and accuracy. These results establish the 5 capability of our present skill quantification system and will assist in future improvement of the analysis algorithm.
    • Observable Signatures of Young Galaxies

      White, S. D. M.; Univ Arizona, Steward Observ (Steward Observatory, The University of Arizona (Tucson, Arizona), 1989-10)
      I review theoretical expectations for the probable appearance of galaxies during their formation phase, placing particular emphasis on the uncertainties in these ideas. Recent models suggest that formation may occur relatively recently, but that young galaxies are less spectacular than previously supposed. They may be analogous to recently discovered high red - shift radio galaxies, and indeed they may have been observed directly in faint galaxy counts. I summarise several other lines of evidence which suggest that galaxy formation may have been a recent process. Finally I give preliminary results from a detailed analytic study of the observable properties of young galaxies in a Cold Dark Matter universe. Predictions are given for faint galaxy counts and redshift distributions, and for the galaxy luminosity function.
    • Observational Evidence for Galactic Spiral Structure

      Bok, B. J.; Univ Arizona, Steward Observ (Steward Observatory, The University of Arizona (Tucson, Arizona), 1970-08)
    • Observations Concerning Flowering and Boll Retention

      Farr, C. R. (College of Agriculture, University of Arizona (Tucson, AZ), 1967-02)
    • Observations of Convective Clouds by Means of Pulsed-Doppler Radar

      Battan, Louis J.; Kassander, A. Richard, Jr.; Theiss, John B.; Institute of Atmospheric Physics, The University of Arizona (Institute of Atmospheric Physics, University of Arizona (Tucson, AZ), 1963-01-15)
      A new pulsed-doppler radar set designed for measuring the vertical distribution of the particle size and vertical-velocity spectra is briefly described. The X-band radar set employs a vertically-pointing antenna producing a 1.3 degree beam. Measurements of the properties of the hydrometeors are made at 500-ft. intervals from 500 ft. to a maximum altitude of 63,000 ft. The intensities of the radar return from particles in each of ten velocity channels are recorded digitally. The analysis of echo returns from showers is discussed in some detail. The data allow inferences of the change of particle size as a function of altitude and time, as well as of the vertical air motions in the cloud. New observations of so-called "angel echoes" are presented. Most often the vertical velocities of the angel echoes were positive. These observations can be used to infer information about clear air convection.
    • Observations of Freezing Nuclei over the Southwestern U.S.

      Kassander, A. Richard, Jr.; Sims, Lee L.; McDonald, James E.; Institute of Atmospheric Physics, The University of Arizona (Institute of Atmospheric Physics, University of Arizona (Tucson, AZ), 1956-11-01)
      The results of daily flights in January, 1955 in the vicinity of Tucson, Arizona tor the purpose of detecting natural freezing nuclei are presented. Samples were taken each day at 15,000 feet, 5,000 feet and at the surface. No systematic correlation was noted with the longNterm total rainfall record according to the Bowen meteoric dust hypothesis, However, the fact that average temperatures for given concentrations of nuclei were found to be within 2C 0 of temperatures for the same concentrations over Sydney, Australia is noted. Certain interesting observations on natural ice crystal clouds are also discussed.
    • OBSERVATIONS OF STAR FORMING REGION NGC 1333

      Revelle, Melissa C (The University of Arizona., 2009-05)
    • Observations of TADS Foramsulfuron Formulations on Sea Isle I Paspalum as Affected by Mowing Height and Foliar Applied Iron

      Kopec, David M.; Gilbert, Jeff J.; Kerr, D.; Kopec, David M. (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2004-02)
    • Observations of the Sun with the 32 Element Murchison Widefield Array Prototype

      Rightley, Shane M. (The University of Arizona., 2010-05)
      Low-frequency radio observations of the quiet Sun provide information about the stratification of the electron temperature in the solar corona. This in turn helps distinguish between localized versus distributed coronal heating processes. We present flux calibrated brightness temperature maps of the Sun from a prototype of the Murchison Widefield Array (MWA) at 5 frequencies between 85 and 235 MHz, corresponding to heights above the photosphere between approximately 0.1 and 1 solar radii. Consisting of 32 electronically pointed tiles, each a phased array of 16 dual polarization dipole antennae and operating between 80 and 300 MHz, the 32 element MWA prototype (32T) provides a test bed for the novel design of the full 512 element array. One objective of the MWA is to advance solar and heliospheric science with fast cadence, high fidelity images of the Sun. In this work we compare integrated flux densities of the quiet Sun produced by the MWA 32T with theoretical expectations and established results. We additionally examine radial brightness temperature profiles and provide a discussion of their possible connections with the large scale electron temperature and density distributions in the solar corona.