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Rick Han's Home Page
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Rick Han

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CSCI 3753 Operating Systems Spring 2008

Associate Professor
Department of Computer Science
University of Colorado at Boulder

contact

Phone: (303) 492-0914
Office: ECCR 1B05F (ring doorbell at ECCR 1B05).
Office Hours: Spring 2008 - Tuesdays 4:30-5:30 pm and Thursdays 2-3 pm in ECCR 1B06 (across the hall from my office)

Campus Box 430
Boulder, CO 80309-0430

Research Interests and Projects:

The Mantis group hosted ACM SenSys 2006 in Boulder!  See the pictures from the conference
FireWxNet Wins Best Paper Award at ACM MobiSys 2006!
firewxnet1
We deployed FireWxNet,  a fire sensor network, in the forests and mountains of Idaho during the summer of 2005 to monitor weather conditions surrounding active wildfires.  Check out pictures from the deployment!  Also, here are some Powerpoint slides from a talk on FireWxNet given in Copenhagen, 2006.  This work was performed in collaboration with the University of Montana.
 firewxnet2
firewxnet3
I lead the Project MANTIS (MultimodAl NeTworks of In-situ Sensors), which conducts research in wireless sensor networks in the following areas:
  • Sensor Systems:
    • The MANTIS OS (MOS) is an open source multithreaded embedded operating system with a simple C API for micro sensor nodes, e.g. MICA2 motes.  [EmNets 2006, ACM MONET journal 2005, WSNA 2003]
    • FireWxNet - a deployment of MOS wireless sensor networks in Idaho's Bitterroot National Forest August/September 2005 to monitor weather conditions in the presence of active wildfires.  [see tech report 2005]  See also an earlier version in the Denver Post article of our research: "Fired Up Over Wireless", 11/02/04. 
    • ELF Flash File system.  [SenSys 2004]
  • Security of Sensor Networks
    • Intrusion-tolerant routing via one-way hash chains that form one-way sequence numbers [Elsevier journal 2005, IPSN 2003]
    • Defenses against traffic analysis attacks  [SecureComm 2005, DSN 2004]
    • Secure in-network processing for hierarchical sensor networks [SASN 2003]
  • Sensor Networking:
    • X-MAC: A Short Preamble MAC Protocol for Duty Cycled wireless sensor networks [tech report 2006]
    • Load balancing [Globecom 2003]
    • TSYNC bidirectional time synchronization service [MC2R 2004]
    • VLM2 multicast
    • Low power operation
  • user interfaces [WMCSA 2003]
Prior Projects:
 Mobile Video, Wireless Web, Transcoding, Progressively Reliable Packet Delivery ( Leaky ARQ ), WebSplitter, "Active Device" Selection in Context-Aware Ubiquitous Computing Environments, Wireless Peer-to-peer Collaborative Learning.



Affiliations:
RECUV