387 research outputs found

    Opera songbook for music appreciation in grades five and six

    Get PDF

    Appraisers and the Fair Housing Law: Accessibility Requirements for the Disabled

    Get PDF
    In 1988 the Fair Housing Act of 1968 was amended to include the "handicapped" as being protected from discrimination in multiunit housing. The three general categories of discriminatory acts are refusal to make or allow reasonable physical modifications to a covered multiunit dwelling, refusal to make reasonable accommodations in rules and practices, and failure to follow certain design and construction standards. The U.S. Department of Housing and Urban Development has issued Fair Housing Accessibility Guidelines, which provide technical guidance on multiunit dwelling design and construction standards. This study examines these guidelines and the impact the Act may have upon value when discriminatory practices are observed.

    Precipitation kinetics of a continuous precipitator, with application to the precipitation of ammonium polyuranate

    Get PDF
    A mathematical model describing the kinetics of continuous precipitation was developed which accounts for crystal nucleation, crystal growth, primary coagulation, and secondary coagulation. Population density distributions, average particle sizes, dominant particle sizes, and suspension density fractions of the crystallites, primary agglomerates, and secondary agglomerates leaving the continuous precipitator can be determined. This kinetic model was applied to the continuous precipitation of ammonium polyuranate, which consists of: (1) elementary crystals, (2) clusters or primary coagulated particles, and (3) agglomerates or secondary coagulated particles. The crystallites are thin, submicron, hexagonal platelets. The clusters had an upper size limit of about 7 ..mu.. in diameter and contained numerous small voids (less than 0.3 ..mu..m) due to the packing of the crystallites. The agglomerates had an upper size limit of about 40 ..mu..m in diameter and contained large voids (approximately 1 ..mu..m). The particle size distribution and particle structure of the ammonium polyuranate precipitate can be controlled through proper regulation of the precipitation conditions. The ratio of clusters to agglomerates can be best controlled through the uranium concentration, and the cohesiveness or internal bonding strength of the particles can be controlled with the ammonium to uranium reacting feed mole ratio. These two conditions, in conjunction with the residence time, will determine the nucleation rates, growth rates, and size distributions of the particles leaving the continuous precipitator. With proper control of these physical particle characteristics, the use of pore formers, ball-milling, and powder blending can probably be eliminated from the nuclear fuel fabrication process, substantially reducing the cost

    Imperfections in TNT.

    Get PDF
    A literature search was conducted to determine the extent of explosive crystallographic data in the literature. The results of that search are reported herein. Explosives are extremely unstable and it is felt by the author that crystalline imperfections may play a major role in explosive mechanisms, A general discussion of crystal imperfections is presented and related to TNT. A study of TNT by conventional crystallographic means, x-ray diffraction and optical examination, is reported upon with results and recommendations for further study.http://www.archive.org/details/imperfectionsint00hoytLieutenant, United States NavyApproved for public release; distribution is unlimited

    Acreage Response of South Dakota Wheat Producers to Expected Price Changes, 1955

    Get PDF
    Prices have long been considered to be an important factor influencing agricultural production. The diversity of views as to the effectiveness of prices in allocating resources in agriculture has served to emphasize the need for further research on this problem. South Dakota is primarily an agricultural state and is vitally concerned with the problem of adjustment. Geographic and economic conditions in South Dakota are widely different from other parts of the nation. This study was undertaken in order that legislators and other policy makers might have access to more research results in formulating future agricultural policies. The purpose of this study was to obtain information on the manner in which South Dakota wheat producers respond to price changes. The specific objectives of the study were: (1) To obtain, from a representative sample of wheat producers, information relating to the acreage adjustments, if any, they would make to expected changes in the relative price of wheat. (2) To explore possible relationships between certain non-price factors and the producer’s propensity to make adjustments. (3) To analyze the results in order to obtain an estimate of the effectiveness of price a tool for inducing adjustments in wheat acreage in South Dakota

    On the Estimation of Maximum Coefficients of Absorption

    Full text link
    corecore