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Fundamental theory of elastic wave scattering by defects in elastic materials: integral equation methods for application to ultrasonic flaw detection

Description: The use of ultrasonic methods in nondestructive testing depends on the interpretation of the scattering of sound waves by flaws. The theory of elastic waves and their scattering in non-uniform media is developed in detail from first principles, and in generality. Both integral equation and differential methods are discussed, with emphasis on the former. General methods for defining scattering cross sections are presented, and conservation theorems are noted. The Born Approximation to the integr… more
Date: May 1, 1976
Creator: Gubernatis, J.E.; Domany, E.; Krumhansl, J.A. & Huberman, M.
Partner: UNT Libraries Government Documents Department
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Investigation of induced unimolecular decomposition for development of visible chemical lasers. Final report, 1 May 1976--30 April 1977

Description: This report summarizes the results of a study of azide decomposition for possible application in a visible chemical laser. Task 1 of the subject contract involved thorough review of the chemical literature pertaining to azide decomposition. Covalently bonded azides decompose directly into an electronically excited nitrene (RN) and ground-state molecular nitrogen. Ionic azides decompose to metal atoms and azide radicals. The azide radicals subsequently recombine to form electronically excited ni… more
Date: May 1, 1977
Creator: Piper, L G & Taylor, R L
Partner: UNT Libraries Government Documents Department
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Solar Pilot Plant, Phase I. Preliminary design report. Volume II. System description and system analysis. CDRL item 2

Description: Honeywell conducted a parametric analysis of the 10-MW(e) solar pilot plant requirements and expected performance and established an optimum system design. The main analytical simulation tools were the optical (ray trace) and the dynamic simulation models. These are described in detail in Books 2 and 3 of this volume under separate cover. In making design decisions, available performance and cost data were used to provide a design reflecting the overall requirements and economics of a commercia… more
Date: May 1, 1977
Partner: UNT Libraries Government Documents Department
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Feasibility demonstration of the Sperry down-well pumping system. Final report

Description: Advantages of down-well pumping (vs. free-flowing) of geothermal hot-water wells are presented, and criteria for such a system are discussed. The main body of the report is presented under the following section headings: the Sperry down-well pumping system; field test program; field operations; test results; and, conclusions and recommendations. The appendix includes a summary of boiler heat transfer and pressure drop calculations. (JGB)
Date: May 1, 1977
Partner: UNT Libraries Government Documents Department
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Development and evaluation of die and container materials. Final report

Description: Specific compositions of high purity silicon aluminum oxynitride (Sialon) and silicon beryllium oxynitride (Sibeon) solid solutions are shown to be promising refractory materials for handling and manipulating solar grade silicon into silicon ribbon. Well controlled processing schedules were developed for fabricating high purity Sialon and Sibeon materials. Essentially the impurity content of the hot pressed ceramics was due only to impurities from the original starting powders. A ceramic shapin… more
Date: May 1, 1979
Partner: UNT Libraries Government Documents Department
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Solar Pilot Plant, Phase I. Preliminary design report. Volume II, Book 2. Central receiver optical model users manual. CDRL item 2. [HELIAKI code]

Description: HELIAKI is a FORTRAN computer program which simulates the optical/thermal performance of a central receiver solar thermal power plant for the dynamic conversion of solar-generated heat to electricity. The solar power plant which this program simulates consists of a field of individual sun tracking mirror units, or heliostats, redirecting sunlight into a cavity, called the receiver, mounted atop a tower. The program calculates the power retained by that cavity receiver at any point in time or th… more
Date: May 1, 1977
Partner: UNT Libraries Government Documents Department
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National Health Insurance Proposals and Their Alternatives

Description: This report discusses legislative proposals for a national heath insurance system and alternatives to a national health insurance plan.
Date: May 5, 1970
Creator: Cavalier, Kathleen
Partner: UNT Libraries Government Documents Department
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Environmental Affairs in the 91st Congress, 1st Session

Description: This report discusses the growth of environmental policy and provides a listing of introduced legislation related to the environment in the 1st Session of the 91st Congress.
Date: May 16, 1970
Creator: Congressional Research Service. Environmental Policy Division
Partner: UNT Libraries Government Documents Department
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The Seniority System: Pros, Cons, and Suggested Reforms

Description: This report discusses the seniority system in Congress used to select committee chairman and efforts to reform the system.
Date: May 27, 1970
Creator: Oleszek, Walter J.
Partner: UNT Libraries Government Documents Department
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Do-It-Yourself Ecology

Description: This report deals with how to develop a good environment.
Date: May 25, 1970
Creator: Environmental Action Inc.
Partner: UNT Libraries Government Documents Department
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The Nixon Doctrine for Asia

Description: This report provides an overview of the Nixon Doctrine for Asia (written in July 1969) and a discussion of its policies regarding communism in Asia and the Vietnam War.
Date: May 11, 1970
Creator: Niksch, Larry A.
Partner: UNT Libraries Government Documents Department
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Developments in Cambodia Following the March 18 Coup

Description: This report discusses the March 18, 1970 coup in Cambodia by General Lon Nol which overthrew the government of Prince Norodom Sihanouk and subsequent fighting in Cambodia between Communist North Vietnamese troops and South Vietnamese troops which led to American intervention in the form of an attack on North Vietnamese bases in Cambodia in April and May of 1970.
Date: May 11, 1970
Creator: Niksch, Larry A.
Partner: UNT Libraries Government Documents Department
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Federal Financial Support for the Construction of Nursing Homes

Description: This report discusses four federal programs which provide funds for the construction of nursing homes and their various provisions for funding.
Date: May 11, 1970
Creator: Kline, Janet
Partner: UNT Libraries Government Documents Department
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The National Commitments Resolution of 1969: Background and Issues

Description: This report discusses the National Commitments Act of 1969 which defined what a national commitment was and that they could only be undertaken with legislative consent not just a Presidential order. It was passed by the Senate in 1969. The legislative history of the bill is outlined in this report.
Date: May 11, 1970
Creator: Collier, Ellen C.
Partner: UNT Libraries Government Documents Department
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Diffusion estimation for small emissions. Preliminary report

Description: A simplified approach is presented to the calculation of ground level concentrations of effluents from small industrial and fuel burning installations. It is intended to serve as a first approximation to a very complex process. Because each stack, building, and terrain configuration is different, actual ground concentrations may frequently differ from the values calculated here by a factor of two. Nonetheless, this procedure should be useful for determining whether ambient air quality standards… more
Date: May 1, 1973
Creator: Briggs, G.A.
Partner: UNT Libraries Government Documents Department
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