Now showing items 15043-15062 of 19159

    • R & D in Continuing Education

      Black, Fiona; Dunn, Judy (Association for Library and Information Science Education, 2005-01)
      This is a PowerPoint presentation (20 slides) on Wednesday January 12, 2005 in Session 4.1: Continuing Education Programs in the U.S. and Canada, sponsored by the Continuing Education SIG at the 2005 ALISE Conference, Boston, MA. The presentation reviews issues of continuing education (CE) from different perspectives. By introducing the experience of the Dalhousie University's Library Science Program in CE, it discusses common problems and highlights some successes. It also advocates collaborative research with other LIS schools and with library associations.
    • Rab14: Role in Cell Polarity and Junction Formation

      Sinha, Natasha (The University of Arizona., 2010-08)
      The establishment of polarity in epithelial cells is dependent on the proper distribution of polarity proteins to the apical or basolateral domain. In addition, these cells are dependent on the necessary trafficking of junctional proteins to cells junctions for cell-cell interactions. Rab GTPases are involved in a number of membrane trafficking pathways in the cell. Here we show Rab14's role in regulating the establishment of polarity and junction formation in epithelial cells. Cyst culture was used to show inactive-Rab14 affects single lumen formation and targeting of gp135, an apically targeted protein, thus showing Rab14 may regulate epithelial polarity. In addition, calcium-switch experiments were used to show that not only do cells expressing inactive Rab14 take longer to lose their cell-to-cell contact, but they also regain their contacts more quickly, indicating Rab14 may be playing a role in junction formation. This was further supported by immunostaining experiments examining the distribution of junctional proteins; increased amounts of these proteins at the junction in inactive-Rab14 at the end-point showed that Rab14 may be involved in endocytosis or recycling of junctional components.
    • Rabbit

      Flandrau Science Center & Planetarium, University of Arizona (1987)
    • Rabbits as a 4-H Project

      Dishaw, O. W. (College of Agriculture, University of Arizona (Tucson, AZ), 1952-02)
    • Rabies in Arizona: Equine Risk and Prevention

      Wright, Ashley D.; Greene, Elizabeth A. (College of Agriculture, University of Arizona (Tucson, AZ), 2016-05)
      The Informed Arizona Equestrian Horse Health Series was designed to bring up to date information on issues of importance to the horse owners of Arizona and beyond. Rabies has been identified in horses in Arizona (most recently Santa Cruz county in 2016), and is not only fatal for horses, but also can affect the humans handling those horses. It is often overlooked as a possible diagnosis due to the nonspecific early signs of infection. Find out how to protect you and your horses from this devastating disease.
    • Race, Nation Building, and the Development of National Identity in Twentieth Century Argentina

      Adams, Alyssa Susan Brideweser (The University of Arizona., 2010-12)
      In my work, I contend that an elite group of intellectuals and officials known as the Generation 1880 led a number of governmental reforms that affected the Argentine self-identity in racialized terms. I argue that Generation 1880 scholars instituted these reforms in order to pursue their own economic interests and maintain social dominance. In the first section of the thesis, I discuss the influences that affected the Generation 1880's construction of their social model. I focus on why Generation 1880 came to define this social model in racialized terms. In the second section of the thesis, I show how social and legal reforms led by Generation 1880 officials enacted the group's racial ideology. Then I examine the way in which these reforms--based upon the elites' racial ideology--effected citizens living in Argentina. Throughout the paper I analyze the way in which Generation 1880's policies affected Argentine self-identity. I maintain that the social pressures exerted by elites, which delineated acceptable from unacceptable social behavior, effected how citizens in Argentina acted. In time, Generation 1880's race-based policies came to define Argentine identity and the traits of the ideal Argentine citizen in racialized terms.
    • Racial/Ethnic Disparities in HIV Survival Among People Diagnosed with HIV in Arizona, 1998‐2012

      Mun, Elijah; The University of Arizona College of Medicine - Phoenix; Gonzalez, Jonathan (The University of Arizona., 2016-03-25)
      Objectives. We described the racial/ethnic disparities in survival among people diagnosed with HIV in Arizona from 1998 to 2012. We determined whether these disparities widened when adjusting for AIDS diagnosis, age at diagnosis, year of diagnosis, and gender. Methods. We compared survival from all causes between Whites and Blacks, Hispanics, Native Americans, Asians, and Multiple/Other races via Kaplan‐Meier survival curves and Cox proportional hazard models controlling for various clinical factors. Results. Multiple/Other races (1.85), Native Americans (1.28), and Blacks (1.19) have statistically significant higher hazard ratios in all‐cause mortality than Whites. When adjusting for AIDS diagnosis, these disparities widened and also showed Hispanics to have greater mortality [Multiple/Other races (2.53), Native Americans (1.44), Blacks (1.43), and Hispanics (1.22)]. Conclusions. Racial/ethnic minorities with HIV, specifically Black, Native Americans, and Multiple races, have significantly decreased overall survival. These disparities widen when considering the AIDS population. Further studies and resources could help identify the cause of these disparities and help generate a solution to diminish the survival gap.
    • Racing The Sun Autonomously: Autonomous Kit For Solar Powered Karts

      Redford, Gary; Scroggins, Sarah Aileen (The University of Arizona., 2019)
      Racing the Sun is an annual STEM event hosted by UA Tech Parks. The main goal of the Racing the Sun event is to encourage high school students to pursue careers in STEM through construction of a solar-powered go kart. Autonomy is a rapidly developing field and has great potential for careers for younger students. The purpose of this project was to create an autonomous kit that can be implemented into future Racing the Sun races. This autonomous kit will introduce high school students to the applications of complex systems such as GPS sensors, electrical wiring, computer programming, and PID controllers. The system utilizes GPS sensors to determine its position in real time and send this information to a PID controller that calculates the necessary steering angle to keep the kart along a desired path. The main goal of the PID controller is to analyze the kart’s position relative to the desired path and minimize the perpendicular distance the kart is from the track (cross-track error). The user can deactivate the system using a kill switch that cuts power to the kart when pressed.
    • Racism and Prejudice in the Twentieth Century: A Tale of Jazz Music and its Musicians

      Garcia, Juan; Ehredt, Amanda Renee (The University of Arizona., 2015)
      This thesis explores the prejudice and tense racial relations minority jazz musicians experienced in the early to mid-twentieth century. By analyzing the lives and careers of Louis Armstrong, Ella Fitzgerald, Frank Sinatra, and Artie Shaw the thesis attempts to answer the following questions: What were the experiences of early jazz musicians? How did White and Black jazz artists interact and cooperate with one another? What obstacles did each race face in the efforts to integrate? And finally, what lasting influences did discrimination have upon the musicians? These particular individuals were chosen because of their immense talent, fame, and relatively wide spread influence across multiple decades of jazz music; together, they provide a widespread view of the era. Through various integration efforts, these black and ethnic white jazz artists worked together in order to overcome both the negative image that American society had of jazz music and the negative image that American society held in regards to minorities.
    • Radar Constraints On The Thickness Of Subsurface Ice Near Hellas Planitia, Mars

      Byrne, Shane; Cook, Claire Wakefield (The University of Arizona., 2019)
      Geomorphological features potentially related to subsurface ice, such as scalloped depressions, expanded craters, pedestal craters, lobate debris aprons, and banded terrain, are present in Hellas Planitia, Mars. We surveyed the region using the Shallow Radar instrument on the Mars Reconnaissance Orbiter to identify candidate subsurface reflectors that may be due to the presence of ice-rich layers. We found that the majority of possible subsurface returns are likely caused by reflections from off-nadir surface topography. However, there are some candidate reflectors in which we have higher confidence, including several adjacent reflectors likely associated with an ice-rich unit mantling a plateau. We also identified basal reflectors of a lobate debris apron consistent with a dielectric constant of relatively pure ice. Additionally, we characterized the candidate reflectors near scalloped depressions, expanded craters, and pedestal craters, and calculated the depths of the reflectors assuming endmembers of pure ice and basalt in order to constrain the possible range of thicknesses for an ice-rich layer. The ice could be thicker than 100 m if the reflectors originate from the base of a pure ice layer. A mixed ice and rock layer would be thinner. We do not find evidence of reflectors associated with banded terrain.
    • Radial Growth Assessment of Western Spruce Budworm Infested Douglas-Fir Trees on the Carson National Forest, New Mexico

      Swetnam, Thomas W.; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1983-11-03)
      Growth of western spruce budworm (WSBW) infested Douglas-fir (Pseudotsugae menziesii) forests on the Carson National Forest, New Mexico, was assessed through dendrochronological analysis of increment cores extracted at breast height. Comparisons of indexed and filtered host and non-host (ponderosa pine [Pinus ponderosa]), tree-ring chronologies revealed that host tree growth was reduced during past and present WSBW outbreaks. The non -host chronologies were used to remove the non-WSBW growth effects from the host chronologies, and the corrected host tree growth indices were then used to assess growth loss during known outbreak periods. Maximum growth loss during one year was generally greater than 50 percent. The average growth loss for five year periods during outbreaks was approximately 30 to 40 percent, and the maximum growth loss between two years during an outbreak was usually more than 50 percent.
    • Radial Growth Losses in Douglas-Fir and White Fir Caused by Western Spruce Budworm in Northern New Mexico: 1700-1983

      Swetnam, Thomas W.; Laboratory of Tree-Ring Research, University of Arizona (Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 1985-10-31)
      Regional outbreaks of western spruce budworms (Choristoneura occidentalis Freeman) have recurred at least three times in northern New Mexico since the early 1920's when the U. S. Forest Service first began systematic forest-pest surveys and documentation (Lessard 1975, U. S. Forest Service documents). The current outbreak was first noticed in a small area on the Taos Indian Reservation in 1974, and since then the defoliated areas have increased in New Mexico and Arizona to more than 370,000 acres of Federal, Indian, State and private lands (Linnane 1984). Losses in timber values can generally be ascribed to radial growth loss, height growth loss, topkilling, reduced regeneration, and mortality (Carlson et al. 1983, Fellin et al. 1983). A damage assessment project was initiated in 1978 and was aimed at obtaining measurements of some of these losses in budworm infested stands on the Carson National Forest, New Mexico (Holland and Lessard 1979). A large data base has subsequently been developed, including yearly measurements on topkilling, mortality, defoliation, and insect population changes (Stein 1980, 1981, Stein and McDonnell 1982, Rogers 1984). A growth assessment study was undertaken in 1982 to determine the feasibility of using dendrochronological methods to identify the timing of past outbreaks and to quantify radial growth losses associated with budworm defoliation (Swetnam 1984). Results of this work showed that three major outbreaks during the twentieth century were clearly visible in the tree-ring samples obtained from currently infested trees. The radial growth of host trees was corrected for age, climate and other non-budworm environmental effects, and then growth losses were computed as a percentage of expected growth (Swetnam 1984). Additional collections were obtained in 1984 in order to expand the scope of the radial growth study. The objectives included 1) assessment of a larger number of tree -ring samples, 2) comparison of radial growth losses between the two primary host species - Douglas-fir (Pseudotsuga menziesii) and white fir (Abies concolor), 3) comparison of radial growth losses between age classes, and 4) analysis of the relationship between yearly measurements of defoliation, insect populations and radial growth. This report summarizes the findings of the above analyses. Increment core samples from the 1982 collections are included here, therefore this report supersedes the earlier report (Swetnam 1984). Information is also presented on observations derived from the dated tree-ring series on the timing of occurrence of known and inferred spruce budworm outbreaks for the past 284 years (1700- 1983). This is the longest record of spruce budworm occurrence yet developed for western North America.
    • Radiation-Induced Sarcoma of the Breast: A Review

      Sheth, Grushma Rajesh (The University of Arizona., 2011-05)
    • Radiative Acceleration of Material

      Weymann, R. J.; Univ Arizona, Steward Observ (Steward Observatory, The University of Arizona (Tucson, Arizona), 1973)
    • Radio Science

      OSIRIS-REx Asteroid Sample Return Mission (2012)
    • Radiology Reporting Preferences of Non‐Radiologist Ordering Clinicians: Prose? Do you even list?

      Al‐Abbadi, Tabarik; The University of Arizona College of Medicine - Phoenix; Gridley, Daniel (The University of Arizona., 2017-04-20)
      The purpose of this survey was to expand the limited knowledge regarding non-radiologist physician preferences in radiology report styles and content.
    • Radius Effect of the Alkaline Earths on the Rate of Inversion of Aragonite to Calcite

      Bennett, Catheryn MacDonald; Schreiber, Joseph F. Jr.; Bennett, Catheryn MacDonald (The University of Arizona., 1972)
      The effect of magnesium, strontium, and other alkaline earths on the formation and persistence of metastable carbonates in the natural environment was investigated to determine the nature of the controlling mechanism. Barium and beryllium were studied to evaluate the effect of ionic radius; magnesium and strontium, in order to determine if the results correlate with the usual order of stability for complexes and adsorbed species. Known weights of aragonite were placed in contact with solutions of beryllium, magnesium, calcium, strontium, and barium. Samples were covered and periodically both pH and percent composition of aragonite determined; supernatant liquids and precipitates were analyzed for cation concentrations by atomic absorption spectroscopy and titrimetric methods. Results indicated that the order of effectiveness of alkaline earth metals in inhibiting recrystallization is : Be > Mg > Sr > Ba. This is the expected order of effectiveness for both surface and solution effects. A solution effect (i.e., sequestration of bicarbonate ions) is strongly suggested by the chemical behavior of each cation.
    • Radon in Arizona

      Spencer, J.E. (1993)