Now showing items 17436-17455 of 19159

    • Tables of the Radar Cross Sections of Water Spheres

      Herman, Benjamin M.; Browning, Samuel R.; Battan, Louis J.; Institute of Atmospheric Physics, The University of Arizona (Institute of Atmospheric Physics, University of Arizona (Tucson, AZ), 1961-12-01)
    • TADS 14776, Manor, Kerb and Corsair Herbicides for Use as Spring Transition Aids in Overseeded Common Bermudagrass Turf

      Kopec, David M.; Gilbert, Jeff J.; Pessarakli, Mohammed; Kopec, David M. (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2004-02)
      Spring transition of overseeded turf has become a major challenge to turfgrass managers in the southern United States. Turf-type ryegrasses which exhibit increased mowing and heat tolerance have made the return of bermudagrass problematic, especially in common bermudagrass. Herbicides were evaluated for use as a Spring transition agent to decrease ryegrass competition/enhance bermudagrass. Treatments of TADS 14776 experimental herbicide, Manor, Kerb and Corsair were applied to overseeded common bermudagrass on may 6, 2001. Application of TADS experimental herbicide at all rates above 0.21 ounce/product increased bermuda enhancement over Kerb, Corsair and Manor, by 29 June 2001. When applied with extra fertilizer applications, the 0.21 ounce rate of TADS was greater than that of Kerb, Corsair and Manor for bermuda transition. TADS applied at the highest rate of 0.64 ounce (+) fertilizer, and TADS @ 0.42 ounce (+) GENAPOL 150 surfactant and extra plot fertilizer, were the first treatments to exhibit total necrosis of the perennial ryegrass overseed by 4 June (1 month after treatment). However, these treatments created a poorer quality turf, compared to other treatments. TADS @ 0.42 ounce (+) extra plot fertilizer ranked highest in bermudagrass plot cover, with five times as much bermudagrass present than untreated controls on 29 May. This same treatment continued with this trend, achieving 100% bermudagrass cover by 29 June (highly desirable). This treatment resulted in a brief decrease in turfgrass quality at 9 and 16 days after treatment (14 May, 21 May). With that in mind, TADS @ 0.42 ounce (+) extra plot nitrogen proved to be the best treatment that produced acceptable levels of turf quality throughout the transition, yielding the fastest re-establishment of the underlying common bermudagrass. At the close of the test on 10 July, TADS @ 0.21 ounce (+) fertilizer and TADS @ 0.42 ounce (+) fertilizer closed with 88% and 99% bermudagrass cover, and mean quality scores of 6.0 and 7.0 respectively. At the close of the test, untreated overseeded common bermudagrass yielded unacceptable turf quality, 19% bermudagrass cover, 14% living green ryegrass cover, with the remainder being dead ryegrass (straw).
    • Tagging Fish: Monitoring Native Species

      McGinley, Susan (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2000-11)
    • Tagging for health information organisation and retrieval

      Kipp, Margaret E. I.; Tennis, Joseph T. (dLIST, 2007)
      This paper examines the tagging practices evident on CiteULike, a research oriented social bookmarking site for journal articles. Articles selected for this study were health information and medicine related. Tagging practices were examined using standard informetric measures for analysis of bibliographic information and analysis of term use. Additionally, tags were compared to descriptors assigned to the same article.
    • Tagging for Health Information Organisation and Retrieval

      Kipp, Margaret E. I. (2007)
      INTRODUCTION Medical professionals seek to capture papers which can be located via keyword or free text search in digital libraries or on the web but are also interested in finding material that has not yet been indexed in on-line databases. Search engines provide a multitude of results [1]. Social bookmarking, where users tag items for their own use, offers a way to locate new and relevant information. CiteULike (citeulike.org), a social bookmarking service, allows articles to be tagged with useful keywords for later retrieval. RELATED STUDIES A previous study [2] compared social bookmarking to existing information organisation structures and found similarities in terminology use and intriguing differences. A sample of articles tagged on CiteULike was examined for contextual differences in keyword usage between users of social bookmarking sites, authors and indexers. Many tags were related to thesaurus terms (descriptors), but were not formally in the thesaurus. [2] This study examines how term usage patterns in tags, keywords and descriptors suggest a similar (or differing) context between users, authors and intermediaries. METHODOLOGY This study examines the use of tags on CiteULike from three medical or biology journals (JAMA, Proteins, and Journal of Molecular Biology) indexed in Pubmed. 1299 unique articles were retrieved from Citeulike; Medical Subject Headings (MeSH) were collected from Pubmed. Articles were analysed using standard informetric techniques to examine the use of user assigned tags and their Pubmed assigned MeSH index terms. Data was analysed for term usage and categorised to see what contextual clues users expose in their tag use. RESULTS Articles were tagged by up to 14 users (average 2-4). 1449 unique tags were used in the data set. Some articles were heavily tagged by users (max. 29, min. 1, median 2). Descriptors were more heavily assigned to articles (2746 unique descriptors). Articles had, on average, 10 descriptors assigned (max. 40, min. 2). Some tags occurred frequently: protein_structure (140), no-tag (134), and protein (114). By journal, tags were: docking (Proteins, 85), no-tag (JAMA, 20), and protein_structure (J Mol Biol, 52). No-tag (system assigned) indicated no tag assigned. Descriptors were more heavily reused than tags, for example: 'Models, Molecular' (550), Protein Conformation (363), and Humans (341). By journal, descriptors were: 'Models, Molecular' (Proteins, 252), 'Models, Molecular' (J Mol Biol, 235), and Humans (JAMA, 137). DISCUSSIONS AND CONCLUSIONS Comparison of tag and descriptor lists shows many of the same similarities and differences as the previous study [2]. Many user terms were related to the author and intermediary terms but not in the thesaurus (e.g. 'diet' and 'fat' used separately in the tag lists where they were linked as 'dietary fats' in the thesaurus). Terms such as 'human' and 'family-studies' show users tagging biology articles are interested in methodology and user groups associated with articles. This study has system design implications for accessing, indexing and searching document spaces. Users express frustration trying to narrow search results. Controlled vocabularies help narrow a search to a manageable size but can be expensive. User tagging could provide additional access points to traditional controlled vocabularies and the associative classifications necessary to tie documents and articles to time and task relationships among other novel items. REFERENCES [1] Tang H, Ng J.HK. 2006. Googling for a diagnosis -- use of Google as a diagnostic aid: internet based study. BMJ 333 (2 Dec), 1143-1145. [2] Kipp MEI. 2006. Complementary or discrete contexts in online indexing: A comparison of user, creator, and intermediary keywords. Canadian Journal of Information and Library Science (in press) http://dlist.sir.arizona.edu/1533/
    • Tagging Practices on Research Oriented Social Bookmarking Sites

      Kipp, Margaret E. I. (2007)
      This paper examines the tagging practices evident on CiteULike, a research oriented social bookmarking site for journal articles. Tagging practices were examined using standard informetric measures for analysis of bibliographic information and term use. Additionally, tags were compared to author keywords and descriptors assigned to the same article.
    • Tagging tagging. Analysing user keywords in scientific bibliography management systems.

      Heckner, Markus; Mühlbacher, Susanne; Wolff, Christian (2007-09)
      Recently, a growing amount of systems that allow content annotation by their users (= tagging) has been created. Simultaneously a debate on the pros and cons of allowing users to add personal keywords to digital content has arisen. A stable category model for social tags on a linguistic as well as functional level is presented, based on data gathered from the scientific bibliography management tool connotea. Also some initial findings of a comparative analysis of social tags and author keywords are reported.
    • Tagging, Folksonomy and Art Museums: Early Experiments and Ongoing Research

      Trant, Jennifer (2009-01)
      Tagging has proven attractive to art museums as a means of enhancing the indexing of online collections. This paper examines the state of the art in tagging within museums and introduces the steve.museum research project, and its study of tagging behaviour and the relationship of the resulting folksonomy to professionally created museum documentation. A variety of research questions are proposed and methods for answering them discussed. Experiments implemented in the steve.museum research collaboration are discussed, preliminary results suggested, and further work described.
    • Tagging, Folksonomy and Art Museums: Results of steve.museum's research

      Trant, Jennifer (2009-01)
      Tagging has proven attractive to art museums as a means of enhancing access to on-line collections. The steve.museum research project studied tagging and the relationship of the resulting folksonomy to professionally created museum documentation. A variety of research questions were proposed, and methods for answering them explored. Works of art were assembled to be tagged, a tagger was deployed, and tagging encouraged. A folksonomy of 36,981 terms was gathered, comprising 11,944 terms in 31,031 term/work pairs. The analysis of the tagging of these works - and the assembled folksonomy - is reported here, and further work described. Tagging is shown to provide a significantly different vocabulary than museum documentation: 86% of tags were not found in museum documentation. The vast majority of tags - 88.2% - were assessed as Useful for searching by museum staff. Some users (46%) always contributed useful tags, while others (5.1%) never assigned a useful tag. Useful-ness increased dramatically when terms were assigned more than once. Activity for Registered Users was approximately twice that of Anonymous Users. The behaviour of individual supertaggers had far more influence on the resulting folksonomy than any interface variable. Relating tags to museum controlled-vocabularies proved problematic at best. Tagging by the public is shown to address works of art from a perspective different than that of museum documentation. User tags provide additional points of view to those in existing museums records. Within the context of art museums, user contributed tags could help reflect the breadth of approaches to works of art, and improve searching by offering access to alternative points of view. Tags offer another layer that supplements and complements the documentation provided by professional museum cataloguers.
    • Taiowa

      Flandrau Science Center & Planetarium, University of Arizona (1987)
    • Taiowa

      Flandrau Science Center & Planetarium, University of Arizona (1987)
    • Taiowa

      Flandrau Science Center & Planetarium, University of Arizona (1987)
    • Taiowa

      Flandrau Science Center & Planetarium, University of Arizona (1987)
    • Taking it Home: Assessing Melodic Expectancies in 14-month Old Infants

      Gerken, LouAnn; Bosch, Sarah Marie (The University of Arizona., 2017)
      The purpose of this study was to explore the associative learning of statistically-frequent, hierarchically-derived melodic sequences in 14-month-old infants, with the ultimate goal of comparing infant musical and linguistic knowledge. Using the Head-Turn Preference Procedure (Nelson et al., 1995), we assessed infant listening preferences for Western Tonal melodies with expected endings, and Western Tonal melodies with unexpected endings, specifically asking whether the infant participants would be able to discriminate the melodic sets. Successful discrimination would indicate knowledge of the statistically-frequent, expected nature of the expected-ending melodies. After comparing mean listening times for the two sets of stimuli, we found no significant difference, which would imply that – at 14 months – infants do not have expectations for the expected nature of our melodies. However, female and male participants demonstrated longer listening times for different stimuli, which may indicate that 14-month-old infants can discriminate expected and unexpected melodies, but that the two genders possess opposing listening preferences. More participants would be needed to further assess this inference.
    • Taking Well to Thirsty: Library Toolbar-Changing of the Users Environment into New Environment

      Ram, Shri; Rao, N Laxman; Kataria, Sanjay; Jaypee University of Information Technology, Solan, India; Jaypee Institute of Information Technology, Noida, India; Osmania University, Hyderabad (2008)
      A Well known phrase in Hindi which elucidate that the ‘Thirsty needs to go to well, well will not come to thirsty’. Toolbar has now changed the scenario in respect that it taking well to the thirsty. This paradigm shift is due to advancement in information and computer technology. The thirsts for the information are increasing day-by-day. Information wells are deepens rapidly, library resources are increasing in collection as well as characters and flowing along with the technology. Library and Information Centers adopting various methodology for collection building, from print media to digital collection, from individual subscription to consortia based collaboration in order to saving budget, library automation for resource management, Web 2.0 technology for information literacy and user education and other tools and technology such as audio visual methods, forum, emails, list-serves, and many more lists are added up during the time for ‘save the time of reader’, what S R Rangnathan’s philosophy reveal. Library services are fading out of sight for most user groups and how these users and their expectations have changed, without us realizing. It contains a strong plea for a focus shift for librarians, a focus into the environments where the users are, instead of expecting them to come to us, or our resources. Exploration of all relevant user environments for your organization, the use of new web-based technologies with Web 2.0 elements and certainly a more structural technical re-design of library information systems is required to deliver library services and resources at the place of need. A simple shortterm solution like a Quick-Search Library Toolbar is explained here as a tool for taking library to user. This paper will discuss the Technology, Methodology and Usability and1 multitasking nature of Library Toolbars for enhanced search methodology. This will also discuss how toolbar can be helpful in getting latest information about the happenings around the globe, latest availability of resources in the library, email check with single click and how the library toolbar has been adopted at authors institution for better user education and information communication. The paper concludes with the remarks for research on more tools like library toolbar for enhancing library activity for user unreached.
    • A Tale of two markets: Employer expectations of information professionals in Australia and the United States of America

      Marion, Linda; Kennan, Mary Anne; Willard, Patricia; Wilson, Concepción S. (2005)
      This paper reports the findings of an exploratory study of 395 library job advertisements in Australia and the USA from August to October 2004. To investigate similarities and differences between the two countries' data we conducted a content analysis and co-word analysis of professional job ads from academic, public and special libraries. Interpersonal Skills, Behavioural Characteristics, and responsiveness to a changeable Environment were identified as critical requirements in both countries.
    • TALENs: Site-Specific Genome Editing in Plants

      Beilstein, Mark; Elfring, Lisa; Leaser, Eileen Joanne (The University of Arizona., 2014)
    • Talking about women and AIDS: Normative discourses on sexuality

      Inhorn, Marcia; Sacks, Valarie Lynne, 1966- (The University of Arizona., 1994)
      A close reading of popular discourses on women and the AIDS epidemic reveals patterns that could be described as attempts to produce and reiterate notions of normative and deviant sexuality. Prostitutes, one frequently depicted "kind" of woman, are presented as indiscriminate, polluting to men, and categorically different from "normal" women. Other women depicted in AIDS discourses are almost always HIV-positive mothers or pregnant women; these women are usually only of concern insofar as they may infect their babies. The themes of self-control, self-discipline, and personal responsibility may also be used to stigmatize women. Such discourses suggest that those who have AIDS are responsible for their own illness. They also deflect attention away from the socioeconomic contexts which may make it more difficult for some to avoid infection, away from the connections between poverty, illness, and disempowerment, and away from the systematic inequalities that characterize U.S. society.
    • Talking Turkey: To Stuff or Not to Stuff

      Meer, Ralph; Misner, Scottie; Nutritional Sciences (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1999-05)
      The holidays usually involve roasting turkeys. A frequently asked question is whether to stuff or not to stuff whole poultry? Either method is acceptable as long as proper cooking and food handling procedures are followed. This article discusses the proper procedures to cook the stuffed and non-stuffed turkey.
    • Tallow, Barley and Stilbestrol for Steers Fed Green-Chopped Alfalfa

      Erwin, E. S. (Agricultural Experiment Station, University of Arizona (Tucson, AZ), 1957-06)