pde2path - A Matlab package for continuation and bifurcation in 2D elliptic systems

pde2path is a free and easy to use Matlab continuation/bifurcation package for elliptic systems of PDEs with arbitrary many components, on general two dimensional domains, and with rather general boundary conditions. The package is based on the FEM of the Matlab pdetoolbox, and is explained by a number of examples, including Bratu's problem, the Schnakenberg model, Rayleigh-Benard convection, and von Karman plate equations. These serve as templates to study new problems, for which the user has to provide, via Matlab function files, a description of the geometry, the boundary conditions, the coefficients of the PDE, and a rough initial guess of a solution. The basic algorithm is a one parameter arclength continuation with optional bifurcation detection and branch-switching. Stability calculations, error control and mesh-handling, and some elementary time-integration for the associated parabolic problem are also supported. The continuation, branch-switching, plotting etc are performed via Matlab command-line function calls guided by the AUTO style. The software can be downloaded from www.staff.uni-oldenburg.de/hannes.uecker/pde2path, where also an online documentation of the software is provided such that in this paper we focus more on the mathematics and the example systems

pde2path - version 2.0: faster FEM, multi-parameter continuation, nonlinear boundary conditions, and periodic domains - a short manual

pdepath 2.0 is an upgrade of the continuation/bifurcation package pde2path for elliptic systems of PDEs over bounded 2D domains, based on the Matlab pdetoolbox. The new features include a more efficient use of FEM, easier switching between different single parameter continuations, genuine multi-parameter continuation (e.g., fold continuation), more efficient implementation of nonlinear boundary conditions, cylinder and torus geometries (i.e., periodic boundary conditions), and a general interface for adding auxiliary equations like mass conservation or phase equations for continuation of traveling waves. The package (library, demos, manuals) can be downloaded at www.staff.uni-oldenburg.de/hannes.uecker/pde2pat

Mangy Curs and Stoned Horses: Animal Control in the District of Columbia from the Beginnings to About 1940

Mangy Curs describes: the efforts of the DC government to corral stray animals (farm animals and pets) from streets and parks (police and the pound service); issues of cruelty to animals in public places (Humane Society); sheltering strays, mostly dogs and cats (Animal Rescue League, others); and collection of dead animals from the streets (contractors, city crew). It is the only study on this subject ever written. The text runs about 260 pages (with illustrations) and a further 100 pages of appendixes (complete list of DC laws/regulations/ court decisions regarding animals, 40 pages of statistics, plus anecdotes and miscellaneous side topics such as pet stores, letters to the police about animals, protecting animals during wartime raids). The text is laden with amusing anecdotes (taking up Pres. Grant’s cow, furious mobs of hog owners attacking the pound wagon) and contemporary observations (“A dog is as dirty as a boy”).https://www.wellbeingintlstudiesrepository.org/ebooks/1017/thumbnail.jp

Mangy Curs and Stoned Horses: Animal Control in the District of Columbia from the Beginnings to About 1940

Mangy Curs describes: the efforts of the DC government to corral stray animals (farm animals and pets) from streets and parks (police and the pound service); issues of cruelty to animals in public places (Humane Society); sheltering strays, mostly dogs and cats (Animal Rescue League, others); and collection of dead animals from the streets (contractors, city crew). It is the only study on this subject ever written. The text runs about 260 pages (with illustrations) and a further 100 pages of appendixes (complete list of DC laws/regulations/ court decisions regarding animals, 40 pages of statistics, plus anecdotes and miscellaneous side topics such as pet stores, letters to the police about animals, protecting animals during wartime raids). The text is laden with amusing anecdotes (taking up Pres. Grant’s cow, furious mobs of hog owners attacking the pound wagon) and contemporary observations (“A dog is as dirty as a boy”).https://www.wellbeingintlstudiesrepository.org/ebooks/1017/thumbnail.jp

Systematics and zoogeography of the bats of the Chaco Boreal

http://deepblue.lib.umich.edu/bitstream/2027.42/56409/1/MP165.pd

Forest age and disturbance pattern history at Eagle Lake, Rowan County, Kentucky

https://scholarworks.moreheadstate.edu/student_scholarship_posters/1221/thumbnail.jp