Julie Letchner

Fifth-year grad. student

University of Washington

Paul Allen Center, Office 390

Phone: (206) 890-8733

Email: letchner at cs.washington.edu

I'm a computer science Ph.D student at the University of Washington who recently switched from an AI focus to a databases focus. My current advisor is Magda Balazinska; in the past I worked with Dieter Fox. My current work focuses on querying archived, probabilistic streams and is part of my broader goal of leveraging principled AI techniques in probabilistic databases.

I was previously an intern at both Microsoft Research (with John Krumm and Eric Horvitz) and Intel Research Seattle (with Anthony LaMarca).

I am sometimes listed by my "real" name, Julia, instead of Julie.

Support pages

Publications:

Access Methods for Markovian Streams
J. Letchner, C. Re, M. Balazinska, M. Philipose
Tech report.
Event Queries on Corrleated Probabilistic Streams
C. Re, J. Letchner, M. Balazinska, D. Suciu
SIGMOD 2008
Cascadia: A System for Specifying, Detecting, and Managing RFID Events
E. Welbourne, N. Khoussainova, J. Letchner, Y. Li, M. Balazinska, G. Borriello, D. Suciu
MobiSys 2008
Map Matching With Travel Time Constraints
J. Krumm, J. Letchner, E. Horvitz
SAE 2007
Trip Router with Individualized Preferences (TRIP): Incorporating Personalization into Route Planning
J. Letchner, J. Krumm, E. Horvitz.
IAAI-2006
- IAAI presentation slides (Quicktime)
Large-Scale Localization from Wireless Signal Strength
J. Letchner, D. Fox, A. LaMarca
AAAI-2005
- AAAI talk slides (15 min) (Pack-and-go .ppt)
- My Quals talk (45 min) on this work. More detailed. (Pack-and-go .ppt)
Axolotls
J. Letchner
Zoo Life Magazine 1991

Misc. Presentations

5-min overview of my current project: Access Paths for Markovian Streams (Quicktime)

Intro. to DBN learning for non-AI people. (Quicktime)

Web-friendly course & internship work, in reverse chronological order:

Mojitos: A Distributed Steganographic File System
Term project for UW's OS quals course, cse551, taught by Steve Gribble & Ed Lazowska in spring 2004.
- Accompanying presentation (.ppt)
Robot Localization Using Wireless Ethernet Signal Strength (.ppt)
Term project for UW's networking quals course, cse561, taught by David Wetherall in autumn 2003.
Tools for Energy Minimization Problems in Vision (.ps)
Written report on my work in the summer of 2003 at NASA Ames. I worked in the K9 Mars rover lab under the guidance of Matt Deans and Larry Edwards.
- Accompanying Presentation (.ppt)
Mini Presentation on Mobile Robot Localization (.ppt)
Miniature 10-minute presentation on mobile robotics given at the end-quarter "symposium" for cs327, Stanford's advanced robotics course. Taught by Oussama Khatib in spring 2003.
Formalisation de la Chirurgie (Surgical Formalization) (.ppt)
Informal presentation on my work in the summer of 2002 at INRIA Sophia-Antipolis (France). I worked on the ChIR surgical robotics team under the guidance of Eve Coste-Maniere. Presentation is in French.
- Accompanying informal web page
Tree-Based Motion Planning (.doc)
Term project for Stanford's motion planning course, cs326. Taught by Jean-Claude Latombe in spring 2002. This one is very project-specific and may be difficult to understand without knowledge of the assignment and project.
Image Segmentation Through Texture Recognition: A Texton Clustering Approach
Term project for Stanford's computer vision course, cs223b. Taught by Chris Bregler in winter 2002.
Women In Computer Science: The College Experience
Term project for Stanford's course on computers and society, cs201. Taught by Eric Roberts in winter 2001.