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Winter 1993

Review of PHASER; Demonstrating the Stability of the Lagrange Points; First Order Analysis of Communication Channels; Buying a Computer Lab; The Savvy Solver II

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Item Review of PHASER
By Jeffery Leader
Review of PHASER, which bills itself as "An Animator/Simulator for Dynamical Systems for IBM Personal Computers," was developed by Huseyin Kocak to provide a computer laboratory component for the elementary ODE course at Brown University.

Item Demonstrating the Stability of the Lagrange Points
By James Warden
The goal of this lab is to make accessible to students of mechanics or differential equations the problem of determining the stability of motion of three bodies under mutual gravitational attraction.

Item First Order Analysis of Communication Channels
By Alan Felzer
This project considers the bread and butter problem in electrical engineering of determining the maximum rate at which a train of data pulses (a square wave) can be sent down a communications channel modeled by a first order equivalent circuit of the form and still be "recognizable" at the output.

Item Buying a Computer Lab
By David Lerner
In the summer of 1992 the Mathematics Department at the University of Kansas was awarded an ILI grant to establish a computer laboratory for our introductory ODE course. This article describes how the department went about choosing hardware and software.

Item The Savvy Solver II
By Larry Shampine
The second in a series of articles on various implementations of numerical methods for solving ODEs and their difficulties.

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