Winter-Spring 1997
What's the IDEA; HPV Made Easier; Modeling with Difference Equations at the Precalculus Level; Modeling the Pumping of a Swing
On Curves of Pursuit: A Computer Laboratory Project in Differential Equations; ODE Architect: Interactive Multimedia Modeling, Differential Equation Solving

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Cover
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Announcements
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What's the IDEA
By Thomas LoFaro; Kevin Cooper -
HPV Made Easier
By Forest W. Simmons -
Modeling with Difference Equations at the Precalculus Level
By Sheldon P. Gordon -
Modeling the Pumping of a Swing
By Stephen Wirkus; Richard Rand; Andy Ruina -
On Curves of Pursuit: A Computer Laboratory Project in Differential Equations
By Ernest D. True -
ODE Architect: Interactive Multimedia Modeling, Differential Equation Solving
By Courtney Coleman -
Back matter
IDEA, or Internet Differential Equations Activities, is funded by a Course and Curriculum Development grant from the Directorate of Undergraduate Education at the National Science Foundation. The project objective is the development of a "interactive virtual lab book" for differential equations at the undergraduate level. Most of the materials on the site so far have been developed at Washington State University; expansion involves contributions from colleagues worldwide.
The author presents an alternative approach to modeling human powered vehicles as a follow up to an article that appeared in the Spring-Summer 1996 issue.
By revamping precalculus and college algebra to include a significant amount of modeling via difference equations, one can help students see applications of mathematics to interesting phenomena.
This article describes various models for the pumping of a swing. The authors show that autonomous forcing is more realistic than nonautonomous forcing, and present other findings related to optimal pumping.
The pursuit problem is one in which the quarry moves along some path unknown to a pursuer, whose objective is to catch the quarry. The problem is to determine the path of the pursuer as it tries to catch the quarry.
This article describes ODE Architect, a multimedia tool for modeling differential equations.
