JEFFERY V. MARCH 1.1.1
(c) 2004-2005 Skylar L. Primm & Basil Tikoff
All rights reserved.
Contact: skylarp@geology.wisc.edu

This program simply displays two clasts of the same specified dimensions
(major and minor axes) and orientations (phi, the angle between the y-axis
and the major axis) and rotates them both in progressive general shear
according to parameters set up by the user (pure shear, simple shear, and
number of steps). One clast acts as a rigid elliptical marker (Jeffery model
rotation), while the other acts as a passive material line (March model rotation).
In this way, the results of each rotation model can be directly compared.

To start a deformation, click the "New Deformation" button and input
your desired parameters. The program will display two clasts, along with
their aspect ratios (Rf) and orientations. Left-click anywhere in the window
to take the deformation forward one step, and right-click (or ctrl-click)
anywhere in the window to take the deformation backward one step. At
any time, you can click "New Deformation" again to start over.

During each step, the program will display each clast's current orientation
and the amount it rotated during the previous step. At any time, you can click
"New Deformation" again to start over.

Jeffery v. March should run on any computer with Java 1.4.2 or later installed,
but the author makes no guarantees. Furthermore, the author is not
responsible for any damage or loss of data caused by running Jeffery v.
March (though the odds of anything untoward happening are quite miniscule).

Feel free to use Jeffery v. March in a classroom setting and distribute it to
students and colleagues. (They are its intended audience, after all.) In any other
circumstances, do not distribute Jeffery v. March without the express permission
of the author.

The most recent version of Jeffery v. March can always be found at my website:
http://www.geology.wisc.edu/~skylarp/java.html

VERSION HISTORY
1.0 - Initial Release
1.1 - When starting a new deformation, Jefferey v. March now retains the input values
from the previous deformation, making repeated simulations easier to perform
1.1.1 - Minor changes to help text