111,796 research outputs found
'Hollow from the start'? Professional associations and the professionalisation of tourism
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
A -Queens Problem. II. The Square Board
We apply to the 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 identical
nonattacking pieces is given by a quasipolynomial function of of degree
, whose coefficients are (essentially) polynomials in that depend
cyclically on .
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 do not vary with . 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
-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
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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