Author Archives: Andy "SuperFly" Rundquist

About Andy "SuperFly" Rundquist

Associate professor of physics at Hamline.

Genetic algorithm for randomizing oral exams

I’ve written before about using genetic algorithms to solve problems, but I wanted to show how flexible they can be by writing here about how they helped me this week. My problem was that I wanted to assign standards to … Continue reading

Posted in mathematica, syllabus creation | 8 Comments

Stepper motor with Arduino motor shield

We have a bunch of Ardunio-brand motor shields and I wanted to jot down what it took to drive a stepper motor with them. The documentation really only tells you how to hook up DC motors, though it does say … Continue reading

Posted in arduino | Leave a comment

Keep from just plowing through

I spent a good portion of the day trying to figure out what I wanted to do in my Theoretical Mechanics class tomorrow. We’ve recently begun the chapter on central potentials and I wasn’t sure how far to try to … Continue reading

Posted in sbar, sbg, syllabus creation | 2 Comments

Double pendulum roller coaster FIXED

My last post was wrong. I’m to blame. But in thinking about it and talking about it with with lots of helpful friends I ended up learning a ton. Here’s the upshot: There were kinks in the roller coaster loop … Continue reading

Posted in mathematica, physics | 6 Comments

Double pendulum roller coaster

I’ve been doing a lot of modeling of beads on wires lately, but today I discovered something that really surprised me. The surprise came when I found a bead/wire system that seemed to violate conservation of energy. Now, it turns … Continue reading

Posted in mathematica, physics | 6 Comments

Lagrange multipliers revisited

I spent the last few days trying to decide whether to teach Lagrange multipliers in my Theoretical Mechanics course. Ultimately I decided to go ahead and do it and I wanted to get down my thoughts on why and what … Continue reading

Posted in mathematica, physics, syllabus creation, teaching | Leave a comment

Setting up oral exams

I’m teaching Theoretical Mechanics this term and next week we have the first set of oral exams. Each student will take 9 oral exams, but each will only be five minutes long. With only 13 students in the course, each … Continue reading

Posted in oral exams, syllabus creation | 5 Comments