111,796 research outputs found

    'Hollow from the start'? Professional associations and the professionalisation of tourism

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    Occupations as diverse as nursing, journalism and marketing have strengthened their claim to professional status and current research suggests that professional associations played a critical part in the process of professionalisation. Following a review of three conceptual approaches to understanding contemporary professionalisation strategies, this paper examines the case of British tourism. It traces the historical development and assesses the current practice of the two main professional associations in the sector. The analysis shows that the ‘professionalisation project’ has largely failed and argues that contemporary frameworks for understanding professionalisation strategies are somewhat deficient when applied to tourism

    Halofantrine

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    A qq-Queens Problem. II. The Square Board

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    We apply to the n×nn\times n chessboard the counting theory from Part I for nonattacking placements of chess pieces with unbounded straight-line moves, such as the queen. Part I showed that the number of ways to place qq identical nonattacking pieces is given by a quasipolynomial function of nn of degree 2q2q, whose coefficients are (essentially) polynomials in qq that depend cyclically on nn. Here we study the periods of the quasipolynomial and its coefficients, which are bounded by functions, not well understood, of the piece's move directions, and we develop exact formulas for the very highest coefficients. The coefficients of the three highest powers of nn do not vary with nn. On the other hand, we present simple pieces for which the fourth coefficient varies periodically. We develop detailed properties of counting quasipolynomials that will be applied in sequels to partial queens, whose moves are subsets of those of the queen, and the nightrider, whose moves are extended knight's moves. We conclude with the first, though strange, formula for the classical nn-Queens Problem and with several conjectures and open problems.Comment: 23 pp., 1 figure, submitted. This = second half of 1303.1879v1 with great improvements. V2 has a new proposition, better definitions, and corrected conjectures. V3 has results et al. renumbered to correspond with published version, and expands dictionary's cryptic abbreviation

    The NASA Lewis large wind turbine program

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    The program is directed toward development of the technology for safe, reliable, environmentally acceptable large wind turbines that have the potential to generate a significant amount of electricity at costs competitive with conventional electric generation systems. In addition, these large wind turbines must be fully compatible with electric utility operations and interface requirements. Advances are made by gaining a better understanding of the system design drivers, improvements in the analytical design tools, verification of design methods with operating field data, and the incorporation of new technology and innovative designs. An overview of the program activities is presented and includes results from the first and second generation field machines (Mod-OA, -1, and -2), the design phase of the third generation wind turbine (Mod-5) and the advanced technology projects. Also included is the status of the Department of Interior WTS-4 machine
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