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19 June 2000 Vol. 5, No. 25 THE MATH FORUM INTERNET NEWS MSTE Java - UIUC | Planar Machines/Topology - Eldar Poly, Tess - Pedagoguery Software The Math Forum's Problem of the Week student recognition page is now on the Web: http://mathforum.org/pow/awards/. We wish to congratulate all the teachers and students who took part during the 1999-2000 school year. Over 31,000 students from all over the world participated in these six Internet projects. \|/ MSTE JAVA - UIUC University of Illinois at Urbana-Champaign http://www.mste.uiuc.edu/java/ Java-based activities submitted to MSTE, the Office for Mathematics, Science & Technology Education at UIUC. Topics include these and more: - Best Fit of a line - Box Perimeter - Buffon Needle - Cereal Box Problem - Chi-Squared Test Analysis of Random Marbles - Estimation of Pi - random points on a circle - Exploring Parabolas - JavaSketchpad activity - Methods for Estimating Roots - Monty's Dilemma - The Moving Man Activity - graph of motion - Numerical Integration Activity - Ohm's Law - flow of electrons in circuits - Solving Systems of Equations - Working with Triangles - JavaSketchpad activity Files are available for downloading for Mac or PC. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- PLANAR MACHINES: AN INVITATION TO TOPOLOGY - Dori Eldar http://www.ma.huji.ac.il/~deldar/thesis/ Learn a few building blocks of topology by studying Basic Machines. 'Of Spiders and Toruses' examines the configuration spaces for a family of machines (oriented surfaces of varying genus), providing an abstract way to describe all the states the machine could take. The site introduces the notion of functional linkages ("Machines as Functions"), or machines that can compute polynomial functions. Java applets that illustrate machines (e.g. Peaucellier linkage) are included. The site is organized into lessons designed to allow people with varying mathematical backgrounds to explore the subject. The applets require a Java 1.1-enabled browser such as Microsoft Internet Explorer 4-5 for Mac or PC, or Netscape Communicator 4.5 (excluding Macintosh systems). -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- POLY, TESS - Pedagoguery Software Shareware programs for manipulating and studying geometric figures. Demo versions are available for downloading. POLY: http://www.peda.com/poly/ Explore and construct models of polyhedra. Poly allows you to manipulate a polyhedral solid on the computer and print out a flattened version (a net), which can then be cut out, folded, and taped to produce a three-dimensional model. Nets of 147 different convex polyhedra can be generated. Poly offers English, Spanish, French, Danish, Korean, Traditional Chinese, and Simplified Chinese interfaces. TESS: http://www.peda.com/tess/ Create symmetric planar illustrations. While you draw, you can automatically maintain the symmetry group you have chosen; 11 rosette groups, all 7 frieze groups, and all 17 wallpaper groups are included. Illustrations may be printed out or saved using Tess' cross-platform format. Versions are available in English and French, and instructions for using the tool box can be viewed by holding the mouse still for a moment over each tool. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- CHECK OUT OUR WEB SITE: The Math Forum http://mathforum.org/ Ask Dr. Math http://mathforum.org/dr.math/ Problems of the Week http://mathforum.org/pow/ Mathematics Library http://mathforum.org/library/ Teacher2Teacher http://mathforum.org/t2t/ Discussion Groups http://mathforum.org/discussions/ Join the Math Forum http://mathforum.org/join.forum.html Send comments to the Math Forum Internet Newsletter editors _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \ |

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