Category Archives: Uncategorized

Block-level Inline Data Deduplication in ext3

Written by aaron on December 20, 2010 — Leave a Comment

For our class project in advanced operating systems, Kris and I took our first foray into Linux kernel programing. We added block deduplication to ext3, a popular filesystem for Linux. The goal is to reduce the number of writes and to save space on the disk. This could be useful for Solid State Disks, where writes are slow [...]

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Programming Contest: 2nd place in region

Written by aaron on November 6, 2010 — Leave a Comment

My team placed 2nd in the North Central North America Region of the ACM International Collegiate Programing Competition! We’ve also advanced to the world finals on March 3rd  in Sharm El Sheikh, Egypt.

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Benchmarking Linux And Hardware

Written by aaron on October 4, 2010 — Leave a Comment

Modern operating systems provide abstractions of hardware to make programming easier. However, it can be possible to learn some details about the hardware using simple benchmarks running in userspace. I wrote some of these benchmarks in C to measure these things on my computer: The cost of a context switch in Linux The size of [...]

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Modern Algebra Notes

Written by aaron on May 5, 2010 — Leave a Comment

modern algebra notes (PDF) modern algebra notes (lyx) There are probably some errors. I used LyX to make this note sheet.

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Image Epitomes

Written by aaron on April 26, 2010 — Leave a Comment

An image can be condensed into an epitome, which captures the essence and statistically significant features of the image.  I created some matlab code based on Vincent Cheung’s examples that can be used for super-resolution. Here is an example result: The epitome itself may not be very interesting, however, it can be used to reconstruct [...]

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Programming Contest: 10th place in region

Written by aaron on October 31, 2009 — Leave a Comment

My team placed 10th out of 201 in the North Central North America region for the ACM International Collegiate Programming Contest.

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Presentation Studio Theme Editor

Written by aaron on August 29, 2009 — Leave a Comment

Solidworks is a popular 3D CAD software suite.  An existing plugin for Solidworks allows users to export a 3D model as a 3D PDF document. However, there were only four templates available for the layout and style of the PDF. During my internship at Solidworks Labs, I created Presentation Studio Theme Editor, which allows users [...]

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