February 2010 Meeting Notes

Compiled by Dave Jaffe

Contributions from Kevin Appert and others


Coffee and a Chat


Revisiting Mandelbrot - CH Ting
"I started doing Mandelbrot plots 20 years ago. At that time, the computer took a long time, about 30 seconds, to render an image. It was nice, but not very interesting. Now computers are fast enough to do one plot a second. This now becomes more interesting, because I can interact with the plots. I like to use a mouse to navigate the plots, but I need help in adding a mouse interface to F#. I have put all the computation into FPU, and am quite proud of it. However, Windows steals the FPU from me and I am not sure that I have the FPU all to myself. Anyway, I will demonstrate almost interactive Mandelbrot plots."

F#214 - 365 Kb zip file
Mandelbrot - 81.2 Kb zip file


We will walk to The Treehouse by Tresidder Union. Here is the menu.


Introductions, Announcements, Rumors, and Random Access
Topics include: A Big Laser (Airborne Laser, ABL), Embedded Systems Conference, announcement day choice, and whatever else may come up.

Airborne Laser
Overview: Future Weapons Airborne Laser
MARTI: Airborne Laser test against target missile
MARTI: ABL - Test flight + infrared lasing
Engagement: Airborne Laser - Historic First Ballistic Missile Intercept
Engagement: MDA Analyzing ABL Test Beam Misalignment
Engagement: How Laser Weapons Work
COIL: High Energy Laser Directed Energy Weapons
COIL: Chemical oxygen iodine laser
Colored Script - John Slater
Making color work in a language
The conditional operator
Hexakopter: remote-control helicopter puts on amazing aerial display video
HexaKopter Micro Copter video


3D Printers & Makerbot - Eric Smith
3D printers, like the Makerbot, are the latest trend in technology. Stepper motors hum, plastic squirts, and before you know it a gimcrack or thingamabob emerges. Freshman-year engineering students are fabricating wind-turbine blades with them. Makerbots can make its own replacement parts. We will hear all about it from Eric, who has assembled one.

Makerbot video




Forth Coding Best Practices - Samuel A. Falvo II
Sam will share his learning experiences with Forth coding best-practices for his High-level Data Link Control (HDLC) network stack supporting his optical communications experiments.

"The HDLC stack I'm writing is far from complete, and has not yet been tested over wire links. But, the current set of unit tests suggests that it can now handle SABM, UA, and DM messages -- meaning that I can now initiate a connection request and handle success and failure, respectively."
Project DOT (Digital Optical Transceiver) Slides - 262 Kb pdf file



Other items:


Meeting Announcement

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