Search Constraints

Start Over
Filtering by: Creator Harper, J. A. (James Arthur), 1916- Remove constraint Creator: Harper, J. A. (James Arthur), 1916- Academic Affiliation General Science Remove constraint Academic Affiliation: General Science

Search Results

  • A critical analysis of wildlife conservation in Oregon

    Creator:
    Rymon, Larry Maring
    Abstract:
    This analysis is the study of Oregon's wildlife resources from the period prior to white settlement up to the present time, including critical projections, based on present trends and expected conditions for both human and wildlife populations in the state up to the year 2010. Prior to white settlement Oregon...
    Resource Type:
    Dissertation
    Full Text:
    . Hill, R. Long, J. Richardson, J. Scharff, Governor C. Sprague, A. Walker, and Mrs. H. Wire. In

  • Norbert Wiener and the growth of negative feedback in scientific explanation : with a proposed research program of "cybernetic analysis"

    Creator:
    Hellman, Walter Daniel
    Abstract:
    Negative feedback has become ubiquitous in science both as a technique and as a conceptual tool. As a technique, negative feedback has a long history; devices based in its use were made in antiquity. It has only been during the last century, however, that rigorous quantitiative methods have become associated...
    Resource Type:
    Dissertation
    Full Text:
    approved: / J. Brookes Spencer Negative feedback has become ubiquitous in science both as a technique

  • John Wesley Powell : science and reform in a positive context

    Creator:
    Zernel, John Joseph, 1945-
    Abstract:
    John Wesley Powell worked actively for public land system reform while a director of geographical and geological surveys in the West from 1869 to 1894. Although this has won him acclaim as a conservationist, the basis of Powell's linkage of reform with scientific work is poorly understood. A study of...
    Resource Type:
    Dissertation
    Full Text:
    REFORM IN A POSITIVE CONTEXT. Redacted for Privacy Abstract approved: ' Robert J. Iris, Jr. John

  • Henry Augustus Rowland and his electromagnetic researches

    Creator:
    Miller, John D. (John David)
    Abstract:
    This analysis concerns the life and scientific work of Henry Augustus Rowland (1848-1901), organizer and the first chairman of the physics department at The Johns Hopkins University in 1876. Special materials used in this research included three pieces of Rowland's experimental apparatus which are extant in the Smithsonian Institution Division...
    Resource Type:
    Dissertation
    Full Text:
    RESEARCHES Abstract approved: Redacted for privacy -R. J. This analysis concerns the life and scientific

  • The development of the chlorinity-salinity concept in oceanography

    Creator:
    Wallace, William J.
    Abstract:
    This study traces the historical foundations of the concept of constant ionic proportionality and the equation (Salinity [S%₀] = 1.805 Chlorinity [Cl%₀] + 0.030) which has been in general use in oceanography since 1902 until 1969 and which is based upon this constancy, The notion that the constituents present in...
    Resource Type:
    Dissertation
    Full Text:
    -SALINITY CONCEPT IN OCEANOGRAM Abstract approved: Redacted for Privacy Vert J. Moris This study traces

  • Ionizing radiation and its chemical effects : a historical study of chemical dosimetry (1902-1962)

    Creator:
    Chorzempa, Mary André, Sister
    Abstract:
    Chemical dosimetry developed in response to needs created by developments in the field of high-energy radiation. Shortly after the discovery of X-rays in 1895 and of radioactivity in 1896, the deleterious effects of ionizing radiation were recognized. To guard against the injurious effects of radiation in medical application, dose-measuring methods...
    Resource Type:
    Dissertation
    Full Text:
    Ionizing radiation and its cheemical effects: a historical

  • History and analysis of the creation research society

    Creator:
    Elliott, William E.
    Abstract:
    The resurgence of creationism the past few years has been led by advocates of recent-creationism. These individuals, a minority among creationists in general, argue that the entire universe was created approximately 10,000 years ago in one six-day period of time. Recent-creationists support their position by appealing to the Genesis account...
    Resource Type:
    Masters Thesis
    Full Text:
    . 62-112, for a detailed discussion of this journal. '°William J. Tinkle, "The Jack-in-the-Pulpit

  • The coloration of animals : a nineteenth century controversy

    Creator:
    Blaisdell, Muriel Louise
    Abstract:
    Mimicry, obscure colors, and secondary sexual colors were important classes of observations that were analyzed by nineteenth century biologists from several vantage points. Adherents of the doctrine of special creation of fixed species believed animal colors to be evidence of design; Darwin and Wallace and their successors suggested that a...
    Resource Type:
    Masters Thesis
    Full Text:
    historiography of science. To Dr. Margaret J. Oster I owe a special debt for her participation in our long

  • An assessment of rival British theories of biogeography, 1800-1859

    Creator:
    Kinch, Michael P.
    Abstract:
    At the beginning of the nineteenth century most theorizing British naturalists supported a Biblical account of the distribution of life which was based upon the notion that life had been dispersed from the resting place of the ark. This implied a relatively even dispersion of life about the Earth, but...
    Resource Type:
    Masters Thesis
    Full Text:
    the result of sev- eral areas of creation. A major goal of the natural theologians, from James C

  • William Ernest Castle, American geneticist : a case-study in the impact of the Mendelian research program

    Creator:
    Taylor, H. Terry
    Abstract:
    In their modern context questions of heredity have come to be closely aligned with theories of evolution because all such theories require the presence of heritable variation. Thus the need for an understanding of a source of variation and a mechanism for its inheritance became very apparent with the general...
    Resource Type:
    Masters Thesis
    Full Text:
    William Ernest Castle, American geneticist : a case