welcome!
You have reached Stephen P. Tarzia's web space. I lead the Engineering Department at a mobile messaging startup called Vaporstream.
Before graduating in August 2011, I was a Ph.D. student at Northwestern University in the Electrical Engineering and Computer Science department. My advisor was Professor Peter Dinda, and I worked on mobile systems, with an emphasis on acoustic sensing. My other interests include music technology, operating systems, electronics design automation, optimization algorithms, Internet telephony, embedded systems, architectural acoustics and high-performance computing.
My graduate work was funded by Northwestern University through various fellowships and through my advisors' National Science Foundation grants.
old news
2013/01/04
Badminton Footwork Trainer version 2.0 for iPhone was and iPad was released on the iTunes store. This is an open-source project
2012/06/04
Badminton Footwork Trainer for iPhone was released on the iTunes store. This is an open-source project
2012/04/26
ClapIR Acoustics Measurement app for iPhone was released on the iTunes store. This is an open-source project
2012/04/25
Prem presented our acoustics research at the AES Convention in Budapest.
2011/12/14
The VaporStream iPhone app is available in the iTunes store! Writing this app was my first responsibility at VaporStream, and I'm pleased with how it turned out.
2011/09/06
I began work as an iPhone software engineer at an exciting Chicago startup called VaporStream.
2011/07/25
I successfully defended my PhD thesis "Acoustic Sensing of Location and User Presence on Mobile Computers." :)
2011/06/30
MobiSys’11 conference talk [paper] [slides]
2011/06/29
Batphone app version 1.2 released on the iTunes store.
2011/06/23
Added a room identification listening test.
2011/03/08
Our paper Indoor Localization Without Infrastructure Using the Acoustic Background Spectrum will be presented at MobiSys’11 in June.
2011/01/27
Batphone app version 1.1 released on the iTunes store.
2010/11/30
Batphone app version 1.0 released on the iTunes store.
2010/10/21
My computer Cosmos has it’s 15 minutes of fame at OOPSLA’10.
2010/06/08
ICAC’10 conference talk [paper] [slides]
2010/03/08
Our paper Display Power Management Policies in Practice will be presented at ICAC’10 in June.
2010/03/05
Check out the Sonar Power Manager video at Tinkernut blog or on Youtube.
2009/10/28
Sonar Power Manager version 0.8 released.
2009/10/15
Sonar Power Manager featured on slashdot.org tech news site.
2009/10/02
UbiComp’09 conference talk [paper] [slides]
2009/10/01
USENIX’09 Annual Technical Conference summaries published. I wrote several of these summaries.
2009/09/24
First public release of Sonar Power Manager, version 0.7.
2009/06/17
Presented Sonar poster at USENIX’09 Annual Technical Conference in San Diego.
2009/04/05
Updated remotecmd code for newer kernels.