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This Biological ESTEEM module in the Ecology Category consists of a Java applet along with more than 100 food web matrices in the form of Excel worksheets. After manipulating these transformed matrices, the patterns are visualized.

An article about the Quantitative Environmental Learning Project (QELP), which has developed a web site featuring many data sets focused on environmental themes

This collection of mathlets comprise a companion for modeling assignments (primarily for calculus) designed to give students hands-on experience describing motion as a combination of basic functions.
Copyright and Fair Use Information for JOMA
This applet supplements the authors' "Gutter Problem" material, but can be used to generally study properties and forms of quadratic functions, both analytically and graphically.

See what's new in JOMA and what's coming soon.

The curve traced out on a baseball by its seam has many symmetries. This article explores the class of closed spherical curves with the same symmetries, which we call generalized baseball curves.

This mathlet helps identify the type (separable, linear, exact, homogeneous, Bernoulli, Ricatti) of a given first order differential equation.

This utility uses the free Flash player plug-in resident in most browsers to allow the user to plot parametrically defined surfaces in cylindrical coordinates. Many examples and directed exercises are included.
In this article, a very simple model is used to describe and generate many types of seashell shapes.