An Unpublished Specimen Days Manuscript Fragment

Prints an early draft of Whitman\u27s "My Late Visit to Boston" (1881), a later version of which was published in Specimen Days as "A Week\u27s Visit in Boston.

Computation of a combined spherical-elastic and viscous-half-space earth model for ice sheet simulation

This report starts by describing the continuum model used by Lingle & Clark (1985) to approximate the deformation of the earth under changing ice sheet and ocean loads. That source considers a single ice stream, but we apply their underlying model to continent-scale ice sheet simulation. Their model combines Farrell's (1972) elastic spherical earth with a viscous half-space overlain by an elastic plate lithosphere. The latter half-space model is derivable from calculations by Cathles (1975). For the elastic spherical earth we use Farrell's tabulated Green's function, as do Lingle & Clark. For the half-space model, however, we propose and implement a significantly faster numerical strategy, a spectral collocation method (Trefethen 2000) based directly on the Fast Fourier Transform. To verify this method we compare to an integral formula for a disc load. To compare earth models we build an accumulation history from a growing similarity solution from (Bueler, et al.~2005) and and simulate the coupled (ice flow)-(earth deformation) system. In the case of simple isostasy the exact solution to this system is known. We demonstrate that the magnitudes of numerical errors made in approximating the ice-earth system are significantly smaller than pairwise differences between several earth models, namely, simple isostasy, the current standard model used in ice sheet simulation (Greve 2001, Hagdorn 2003, Zweck & Huybrechts 2005), and the Lingle & Clark model. Therefore further efforts to validate different earth models used in ice sheet simulations are, not surprisingly, worthwhile.Comment: 36 pages, 16 figures, 3 Matlab program

Marshall University Music Department Presents The Marshall University Symphony Orchestra, Concert of Soloists, Dr. Elizabeth Reed Smith, conductor, Dr. Edwin Bingham, guest conductor, featuring, Jordan Carinelli, alto saxophone, Yuhao Zhoe, violin

https://mds.marshall.edu/music_perf/1387/thumbnail.jp

Inquiry in Technology Education

Technology education involves much more than instruction of the artifacts and methods of technology. The increasing amount and complexity of technology require students to know how to use, manage, assess, and understand technology. Inquiry is a cognitive instructional strategy that can help students learn about current technologies and also provide them with tools for investigating emerging technologies as they are encountered