1,793 research outputs found

    When the Trumpet Call is Unclear: A Rhetorical Analysis of the Speech That Launched the Jesus Seminar

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    Since the Jesus Seminar has become almost iconic in religious media coverage, it merits academic scrutiny. This article focuses on the Seminar\u27s inaugural address given by founder Robert Funk on March 21, 1985, at the Pacific School of Religion in Berkeley, California. In that address, Funk set forth the Seminar\u27s mission and method that has guided the association ever since. The main thesis of this article is that clues to the Seminar\u27s successes and failures may be found in Funk\u27s inaugural address, which may be uncovered through a text-in-context analysis of the speech

    Numerical Implementation of a Critical State Model for Soft Rocks

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    This paper details the basic tasks for the numerical implementation of a simple elasto-plastic critical state model for bonded materials (i.e. soft rocks-hard soils) into the finite element program SNAC developed at the University of Newcastle in Australia. The first task described focusses on the derivation of the incremental constitutive relationships used to represent the mechanical response of a bonded/cemented material under saturated conditions. The second task presents how these stress-strain relations can be numerically integrated using an explicit substepping scheme with automatic error control. The third task concentrates on the verification of the substepping algorithm proposed. The model used to represent the saturated mechanical response of a bonded material combines the modified Cam clay with the constitutive relationships for cemented materials proposed in Gens & Nova (1993), but incorporates some flexibility on the degradation law adopted. The role of suction and other relevant aspects of unsaturated behaviour are also discussed at the end of the paper

    Stability, Instability, and "Backwards'' Transport in Accretion Disks"

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    The stratification of entropy and the stratification of angular momentum are closely analogous. Of particular interest is the behavior of disks in which angular momentum transport is controlled by convection, and heat transport by dynamical turbulence. In both instances we argue that the transport must proceed ``backwards'' relative to the sense one would expect from a simple enhanced diffusion approach. Reversed angular momentum transport has already been seen in numerical simulations; contra-gradient thermal diffusion should be amenable to numerical verification as well. These arguments also bear on the observed nonlinear local stability of isolated Keplerian disks. We also describe a diffusive instability that is the entropy analogue to the magnetorotational instability. It affects thermally stratified layers when Coulomb conduction and a weak magnetic field are present. The criterion for convective instability goes from one of upwardly decreasing entropy to one of upwardly decreasing temperature. The maximum growth rate is of order the inverse sound crossing time, independent of the thermal conductivity. The indifference of the growth rate to the conduction coefficient, its simple dynamical scaling, and the replacement in the stability criterion of a conserved quantity (entropy) gradient by a free energy (temperature) gradient are properties similar to those exhibited by the magnetorotational instability.Comment: 21 pages, 5 figs., AAS LaTEX macros v4.0. Accepted to ApJ, final versio

    Teaching Ethics via The Great Glass Elevator

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