Mathematical modeling of subconscious vision
My Ph.D work focused on mathematical modeling subconscious vision; i.e. any visual processing that occurs without our active awareness. Under this umbrella, I've worked on optimal control of the circadian clock, model identifiability from a differential algebra perspective, modeling retinal cells, and mobile app data collection.
As part of my research, I developed the mobile application Entrain
, which provides mathematically optimal schedules of light and dark to travelers crossing time zones. Entrain is free, and users can opt-in to anonymously submit their data back to the University of Michigan for research purposes.
I've taught Calculus I and II and been a course assistant for Calc III. I've also helped teach summer programs for M-Sci
, and created a camp for MIDAS
helps travelers get over jet lag by recommending when to seek and avoid light.
is an iOS app that animates line drawings by making them very slightly wiggly.
is a web and iOS app that automatically turns images into step-by-step drawing guides.
A VR-compatible app for low vision patients developed with Matt Jacobs and Kwoon Wong.
I Am Calculus
An app my students and I made during M-Sci 2014 that teaches basic definitions needed for calculus through straight-forward multiple choice questions.
At Which Location
A goofy "Where's Waldo?" generator I made. You provide a picture, it adds a red and white hat to a random face it finds.
Turns blocks of text into a multiple choice quiz to make it so you have to think while you read.
Old Sleep Studies
I maintain a selection of some of my favorite old sleep studies, one of which inspired 205
Space Invaders-style game made with David Renardy to teach Calc II students which integration technique to try.
Shame yourself into writing by starving a cute pony when you don't (Caveat: Have not touched in 5 years; probably won't work on new machines).
My webcomic, updated weekly-ish
Some Myths About Math
About math myths! Featuring math myths, and some fairytales
Inspired by Pasnau et al., 1968.
Comics I've drawn about the methods scientists employ to do science
From the MMSS camp on Art and Mathematics, 2016
World Walkers Podcast
My beloved Dungeons and Dragons 5e group
Right now, this points to a comic I made for The Last Word on Nothing! Adding more soon.
You can reach me at ojwalch (at) umich (dot) edu.