Supported by Samsung Scholarship, 2008–2017
EE 364a (Convex Optimization I) Course Assistance, 2013–14 Summer
EE 364b (Convex Optimization II) Course Assistance, 2013–14 Spring
EE 364a (Convex Optimization I) Course Assistance, 2013–14 Winter
CS 161 (Design and Analysis of Algorithms) Course Assistance, 2012–13 Spring
CS 97SI (Introduction to Competitive Programming Contests) Instructor, 2011–12 Winter
Stanford ACM-ICPC Coach and Problem Setter, 2010–Present
Korea Olympiad in Informatics (KOI) Coach and Problem Setter, 2008, 2012
International Olympiad in Informatics (IOI) Student Coach of the Korea team, 2013
This year's Korea team won 2 golds and 2 silvers, placing 3rd (unofficial country rank).
USA Computing Olympiad (USACO) Coach and Problem Setter, 2008–2011
Some old USACO stuff can be found here.
2007: Silver (7th place)
David Kamm and Jaehyun Park, “Cortically Inspired Architectures for Action Recognition in Movie Clips”, Computational models of the neocortex final project, 2010. (pdf)
Michael Harris, David Kamm, Jaehyun Park, and Jeffrey Wang, “Unsupervised Learning of Invariances in Deep Networks”, Research project in artificial intelligence with Professor Andrew Ng, 2010. (slides)
Michael Harris, Jaehyun Park, and Jeffrey Wang, “Deep Networks on the GPU”, Machine learning final project, 2010. (pdf)
Jaehyun Park, “Clone Detection in a Software Using Graph Modeling”, Research project with Professor Byung-Ro Moon (Seoul National University), 2006. (pdf in Korean)
Research intern at Microsoft Research, 2013
Software engineer at imo.im, 2011
Software engineer at Facebook, 2009
Chopin: Barcarolle in F sharp (video) (June 2014)
Kapustin: Concert Etude 'Reverie’ (video) (June 2014)
Rachmaninoff: Piano Concerto No. 1 in F sharp minor, Movement 3 (video) (2nd piano: George Barth, December 2012)
Jaehyun's Senior Recital live recordings (May 2012)
I won the Humanities & Sciences Undergraduate Prize in Music for my performance of Chopin's 4th Ballade.
Beethoven: Cello Sonata No. 3 in A major, Movement 1 (video) (cello: John Pardon, February 2012)
Rachmaninoff: Piano Concerto No. 3 in D minor, Movement 3 (video) (2nd piano: George Barth, March 2011)
Rachmaninoff: Piano Concerto No. 3 in D minor, Movement 2 (video) (2nd piano: George Barth, December 2010)
All other recordings are uploaded here.
This video was part of a PandoDaily article “Top 5 Stanford CS Students You Should Know,” posted on March 30th, 2012. The article is gone now, and only the video is remaining.
Simple VLC extension I wrote for cropping videos using ffmpeg.
I'm a big fan of (2D) fighting games like the Street Fighter series.
Just for fun, I made printable command lists for P4A and P4AU here.
I began indoor rock climbing in September 2014. My current level is 5.11b (top rope) and V5 (bouldering).