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Filtering by: Creator Amberg, Herman Robert, 1920- Remove constraint Creator: Amberg, Herman Robert, 1920- Academic Affiliation General Science Remove constraint Academic Affiliation: General Science

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  • 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:
    1920's. In the meantime ionization methods of dosimetry became popular, although some of the earlier

  • 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:
    fundamentalist anti-evolution crusade of the 1920's with the charismatic William Jennings Bryan in the lead, the

  • 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:
    London, and Dr. Allen G. Debus of the University of Chicago for their comments on Robert Boyle and the

  • 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:
    cooperatively with several state and federal agencies in the 1920's and 1930's in an effort to restore depleted

  • A study of relative speeds of medical x-ray film and intensifying screen combinations

    Creator:
    Gross, Richard Eugene
    Abstract:
    The objective of this study was to determine the relative speeds of available medical x-ray films exposed directly to x-rays and exposed in combination with various types of intensifying screens. The information obtained from this sensitometric data was used to obtain factors by which a radiographic exposure technique with one...
    Resource Type:
    Masters Thesis
    Full Text:
    rgus on, 1920). 9 In 1876, two German chemists, Robert Wilhelm Bunsen and Henry E. Roscoe

  • 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:
    Employment 69 83 87 96 Four Wiener 1920-1943: Preparation for Cybernetics 117 The Development of

  • 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:
    , "Introduction to Symposium 8: Relations between Theories of Heredity and Evolution (1880-1920)," in E.G. Forbes

  • The antibiotic discovery era (1940-1960) : vancomycin as an example of the era

    Creator:
    McGraw, Donald J.
    Abstract:
    An examination of the technical and historical literature concerning the discovery and development of antibiotics suggests the possible existence of an era of discovery. This era appears to have a well-defined beginning (about 1940) and a well-defined close (about 1960). It is the purpose of this dissertation to examine the...
    Resource Type:
    Dissertation
    Full Text:
    . Harvey M. Higgings, Mr. Robert Higgs, Mr. William C. Herman, Miss Jane Johnson, Dr. Edmund C. Kornfeld

  • 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:
    and Supervisor of the Division of Electri- city. Professor Robert J. Morris of the Department of