Alien Registration- Ricker, Margaret A. (Portland, Cumberland County)

https://digitalmaine.com/alien_docs/21593/thumbnail.jp

Alien Registration- Ricker, Margaret A. (Portland, Cumberland County)

https://digitalmaine.com/alien_docs/21593/thumbnail.jp

Subject trend in the secondary curriculum with special reference to Massachusetts

This item was digitized by the Internet Archive. Thesis (Ed.M.)--Boston Universit

Salute to Castine

https://digitalcommons.library.umaine.edu/mmb-me/1238/thumbnail.jp

The Elite Two Step

https://digitalcommons.library.umaine.edu/mmb-me/1061/thumbnail.jp

A Direct Multigrid Poisson Solver for Oct-Tree Adaptive Meshes

We describe a finite-volume method for solving the Poisson equation on oct-tree adaptive meshes using direct solvers for individual mesh blocks. The method is a modified version of the method presented by Huang and Greengard (2000), which works with finite-difference meshes and does not allow for shared boundaries between refined patches. Our algorithm is implemented within the FLASH code framework and makes use of the PARAMESH library, permitting efficient use of parallel computers. We describe the algorithm and present test results that demonstrate its accuracy.Comment: 10 pages, 6 figures, accepted by the Astrophysical Journal; minor revisions in response to referee's comments; added char