57 research outputs found

    Development of solutions to benchmark piping problems

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    Benchmark problems and their solutions are presented. The problems consist in calculating the static and dynamic response of selected piping structures subjected to a variety of loading conditions. The structures range from simple pipe geometries to a representative full scale primary nuclear piping system, which includes the various components and their supports. These structures are assumed to behave in a linear elastic fashion only, i.e., they experience small deformations and small displacements with no existing gaps, and remain elastic through their entire response. The solutions were obtained by using the program EPIPE, which is a modification of the widely available program SAP IV. A brief outline of the theoretical background of this program and its verification is also included

    Analytic modelling of locking protocols in database systems

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    Selective production of human antigen specific helper factor from normal volunteers: implications for human Ir genes.

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    Based on previous systems for generating helper cells and factors from mouse spleen cell cultures, an in vitro system for the production and detection of human helper factors to the synthetic polypeptide antigens (T,G)-A--L and GAT10 was developed. The factors are made by human peripheral blood leucocytes and are antigen-specific, as judged both by functional criteria and specific binding and elution from antigen columns. Out of the first six volunteers studied two were high responders to (T,G)-A--L, but non-responders to GAT, two responders to GAT but not (T,G)-A--L. One subject made factors to both antigens and the sixth reacted to neither. The antigens chosen are known to be under MHC-linked immune response (Ir) gene control in all animal species tested, with some strains being responders while others are not. The selective responsiveness, different between individuals, thus suggests that the response to these antigens in man is under Ir gene control. Because of the small size of the sample initially studied and HLA typed, it was not surprising that there was no clear-cut association of response with any particular histocompatibility type at the HLA-A, B, C or D locus

    Organizing the circus : the engineering of miracles

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    This paper defines the circus as an institutionalised questioning of forms of stability and classification, and then enquires as to how such effects are produced. I begin with the cultural representations of the circus, and then move through sections on community, movement and economic organization. This order is intended to illustrate that the production of mystery is a complex affair, and that cultural and economic descriptions of this particular form of organization are necessarily entangled. Focussing on one at the expense of the other leads to either a culturalism which lacks an understanding of production, or a business model which is incapable of understanding miracles
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