- user warning: Table './jem/sessions' is marked as crashed and should be repaired
query: SELECT COUNT(sid) AS count FROM sessions WHERE timestamp >= 1231497212 AND uid = 0 in /var/www/net.jem-thematic/site/includes/database.mysql.inc on line 174.
- user warning: Table './jem/sessions' is marked as crashed and should be repaired
query: SELECT DISTINCT u.uid, u.name, s.timestamp FROM users u INNER JOIN sessions s ON u.uid = s.uid WHERE s.timestamp >= 1231497212 AND s.uid > 0 ORDER BY s.timestamp DESC in /var/www/net.jem-thematic/site/includes/database.mysql.inc on line 174.
Inserito da Antonio il Mer, 2008/09/24 - 19:26
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This laboratory is designed to experiment and visualize the elemental concepts of differential geometry of curves in the plane or the space.
It is possible to use it in:
http://www.mat.uned.es/GeoCM/2PP/lab_curvas/_apps/matematica3d_20.app/ma...
(please be patient, some times our server is slow)
With this laboratory it possible to visualize the Frenet frame, osculatrix circle, evolute, osculatrix plane, ... and to compute curvature, torsion, arc length, ... of differential curves and to see nice animations.
There are several curves previously defined and the user can introduce its favourite ones using parametrization or curvature and torsion (i.e. it is possible to experiment with the fundamental theorem of curves).
The laboratory is made using the sugestion of our students and some of them participe very actively in all the process.
We are now doing some documentation and an english traslation.
The laboratory is programed using Easy Java Simulation, a very nice tool that has been created by Francisco Esquembre (Murcia University) and is part of the Open Source Physics project:
http://www.um.es/fem/EjsWiki/index.php/Main/HomePage
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