Cyber-Physical Systems Laboratory - User contributions [en]

WU WSN Research Group Members

2010-08-06T19:06:58Z

Liangfok: /* Former Graduate Students */

== Professors ==
* [http://www.cs.wustl.edu/~lu/ Chenyang Lu]
* [http://www.cs.wustl.edu/~roman/ Gruia-Catalin Roman]

== Graduate Students ==
* Yong Fu (PhD).
* [http://userfs.cec.wustl.edu/~gwh2/ Greg Hackmann] (PhD).
* Abu Sayeed Saifullah (PhD).
* [http://students.cec.wustl.edu/~ms31/ Mo Sha] (PhD).
* Chengjie Wu (PhD).
* Sisu Xi (PhD).

== Former Graduate Students ==
* [http://www.cse.wustl.edu/~ochipara/ Octav Chipara] (PhD, 2010): Postdoc at UCSD.
* [http://www.cse.wustl.edu/~liang/ Chien-Liang Fok] (PhD, 2009): Postdoc at UT Austin
* [http://www.cse.wustl.edu/~sangbhat/ Sangeeta Bhattacharya] (PhD, 2008): Research Engineer, Intel Systems Research Center (Bangalore).
* Yuanfang Zhang (PhD, 2008): Developer, Microsoft Research (Redmond).
* [http://www.cse.msu.edu/~glxing/ Guoliang Xing] (PhD 2006): Assistant professor, Michigan State University.
* [http://www.ece.utk.edu/~xwang/ Xiaorui Wang] (PhD 2006): Assistant professor, University of Tennessee, Knoxville.
* [http://www.cs.wustl.edu/~qingfeng/ Qingfeng Huang] (PhD, 2003): Start up (formerly with Palo Alto Research Center (PARC).

* Weijun Guo (MS, 2009).
* Fei Sun (MS, 2008).
* Yingming Chen (MS, 2007).
* [http://www.eecs.berkeley.edu/~klueska/ Kevin Klues] (MS, 2007).

TinyOS 1.x Installation

2010-07-08T06:36:29Z

Liangfok:

TinyOS is an event based operating environment designed for use with embedded networked sensors. TinyOS 1.x is the first version of this operating system. It works on many platforms including Mica2, MicaZ, TelosB, Imote, and Imote2. Configuring TinyOS 1.x depends on your underlying operating system. Please select your operating system from the list below.

* [[TinyOS 1.x Installation on Windows XP|Windows XP]]
* [http://www.cse.wustl.edu/~liang/tinyos-install/linux/linux.html Linux]
* [http://klueska.doesntexist.com/installing_tinyos2.html TinyOS 1.x Installation on OSX]
** [http://docs.google.com/View?docid=d3n2pnt_11czfshk Liang's Notes]

CSE730x Research Seminar

2009-12-24T02:39:03Z

Liangfok: /* September 25, 2009 - Weijun (Vincent) Guo */

{| align="right"
| __TOC__
|}

* '''Instructors:''' [http://www.cse.wustl.edu/~lu Chenyang Lu] and [http://www.cse.wustl.edu/~roman Gruia-Catalin Roman]
* '''Time: Friday at 2-3:30pm, Location: Bryan 509C'''

This seminar examines fundamental and emerging concepts in concurrency and distribution by studying seminal papers and recent research results. Broad topics of interest include models of concurrency, mobile computing, parallel architectures, sensor networks, distributed algorithms, and specialized protocols. Each semester, the seminar emphasizes different themes reflecting the current research interests of the participants.

The theme of this semester's seminar is Wireless Sensor Networks. We will read and discuss papers from recent major conferences on mobile, wireless, and sensor networks and systems. These conferences include:

* [http://sensys.acm.org/ SenSys]
* IPSN ([http://portal.acm.org/citation.cfm?id=984626&coll=portal&dl=ACM&CFID=26359144&CFTOKEN=96957034 ACM Archive])
* MobiCom ([http://portal.acm.org/toc.cfm?id=SERIES395&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* MobiSys ([http://www.sigmobile.org/mobisys/2006/ 2006], [http://portal.acm.org/toc.cfm?id=SERIES11190&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* NSDI ([http://www.usenix.org/events/nsdi07/ USENIX Website])
* [http://sosp.org/ SOSP]
* OSDI ([http://www.informatik.uni-trier.de/%7Eley/db/conf/osdi/ Archive website])
* RTSS ([http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000619 IEEE Archive])
* RTAS (IEEE Archive: [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000616 part1] [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000621 part2])
* SIGCOMM ([http://www.sigcomm.org/ Website])
When choosing a paper to present, you may look through the conferences mentioned above, or view the [[List of Potential Papers|list of potential papers]].

=== August 28, 2009 - Abu Sayeed Saifullah ===

''WirelessHART''

=== September 4, 2009 - Octav Chipara ===

''Reliable Clinical Monitoring.''

=== September 11, 2009 - Yong Fu ===
<blockquote>Feedback Thermal Control for Real-time Systems</blockquote>

=== September 18, 2009 - Chengjie Wu ===

<blockquote> Miroslav Pajic and Rahul Mangharam, Anti-Jamming for Embedded Wireless Networks, IPSN 09, Apr. 2009.</blockquote>

Paper: [http://mlab.seas.upenn.edu/node/109]

=== September 25, 2009 - Weijun (Vincent) Guo ===

Paper:
<blockquote>Chen, Y., Gnawali, O., Kazandjieva, M., Levis, P., and Regehr, J. 2009. Surviving sensor network software faults. In Proceedings of the ACM SIGOPS 22nd Symposium on Operating Systems Principles (Big Sky, Montana, USA, October 11 - 14, 2009). SOSP '09. ACM, New York, NY, 235-246. DOI= http://doi.acm.org/10.1145/1629575.1629598
</blockquote>

Abstract:
<blockquote>
We describe Neutron, a version of the TinyOS operating system that efficiently recovers from memory safety bugs. Where existing schemes reboot an entire node on an error, Neutron's compiler and runtime extensions divide programs into recovery units and reboot only the faulting unit. The TinyOS kernel itself is a recovery unit: a kernel safety violation appears to applications as the processor being unavailable for 10-20 milliseconds.
 
 
Neutron further minimizes safety violation cost by supporting "precious" state that persists across reboots. Application data, time synchronization state, and routing tables can all be declared as precious. Neutron's reboot sequence conservatively checks that precious state is not the source of a fault before preserving it. Together, recovery units and precious state allow Neutron to reduce a safety violation's cost to time synchronization by 94% and to a routing protocol by 99.5%. Neutron also protects applications from losing data. Neutron provides this recovery on the very limited resources of a tiny, low-power microcontroller.
</blockquote>

Paper: [http://www.sigops.org/sosp/sosp09/papers/chen-sosp09.pdf Paper], [http://www.cse.wustl.edu/wsn/images/3/3b/Surviving_Sensor_Network_Software_Faults.pptx My slides]

=== October 2, 2009 - Sisu Xi ===

=== October 9, 2009 - N/A ===
''Canceled due to RTAS deadline.''

=== October 16, 2009 - N/A ===

''Fall Break''

=== October 23, 2009 - Louis Thomas ===
* The Hitchhiker's Guide to Successful Wireless Sensor Network Deployments" by Barrenetxea et al.
** Link: http://www.csce.uark.edu/~nilanb/teaching/papers/Barrenetxea.pdf

=== October 30, 2009 - N/A ===
''Canceled due to IPSN deadline''

=== November 6, 2009 - Mo Sha ===

=== November 13, 2009 - Yong Fu ===

=== November 20, 2009 - Greg Hackmann ===

<blockquote>RACNet: A High-Fidelity Data Center Sensing Network. Chieh-Jan Mike Liang, Jie Liu, Liqian Luo, Andreas Terzis, Feng Zhao. SenSys 2009.
</blockquote>

Links: [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet.pdf Paper], [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet_Slides.pdf Slides]

=== November 27, 2009 - N/A ===
''Thanksgiving Break''

=== December 4, 2009 - Chien-Liang Fok ===

<blockquote>Ramanathan, N., Schoellhammer, T., Kohler, E., Whitehouse, K., Harmon,
T., and Estrin, D. 2009. Suelo: human-assisted sensing for exploratory
soil monitoring studies. In Proceedings of the 7th ACM Conference on
Embedded Networked Sensor Systems (Berkeley, California, November 04 -
06, 2009). SenSys '09. ACM, New York, NY, 197-210. DOI=
http://doi.acm.org/10.1145/1644038.1644058</blockquote>

=== December 11, 2009 - Abu Sayeed Saifullah ===

=== December 18, 2009 - N/A ===

''Winter Break''

==Previous Semesters==
* [[Seminar Summer 2009|Summer 2009]]
* [[Seminar Spring 2009|Spring 2009]]
* [[Seminar Fall 2008|Fall 2008]]
* [[Seminar Summer 2008|Summer 2008]]
* [[Seminar Spring 2008|Spring 2008]]
* [[Fall 2007]]
* [[Summer 2007]]
* [[Spring 2007]]
* [[Fall 2006]]
* [[Spring 2006]]
* [[Fall 2005]]
* [[Spring 2005]]
* [[Fall 2004]]
* [[Spring 2004]]
* [[Fall 2003]]
* [[Spring 2003]]
* [[Fall 2002]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2002.html Spring 2002]
* [http://userfs.cec.wustl.edu/~cs673/fall.2001.html Fall 2001]
* [http://userfs.cec.wustl.edu/~cs673/spring.2001.html Spring 2001]
* [[Fall 2000]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2000.html Spring 2000]
* [http://cec.wustl.edu/~cs673/backUp/fall.1998.html Fall 1998]
* [http://cec.wustl.edu/~cs673/backUp/spring.1998.html Spring 1998]

CSE730x Research Seminar

2009-12-24T02:35:16Z

Liangfok: /* September 25, 2009 - Weijun (Vincent) Guo */

{| align="right"
| __TOC__
|}

* '''Instructors:''' [http://www.cse.wustl.edu/~lu Chenyang Lu] and [http://www.cse.wustl.edu/~roman Gruia-Catalin Roman]
* '''Time: Friday at 2-3:30pm, Location: Bryan 509C'''

This seminar examines fundamental and emerging concepts in concurrency and distribution by studying seminal papers and recent research results. Broad topics of interest include models of concurrency, mobile computing, parallel architectures, sensor networks, distributed algorithms, and specialized protocols. Each semester, the seminar emphasizes different themes reflecting the current research interests of the participants.

The theme of this semester's seminar is Wireless Sensor Networks. We will read and discuss papers from recent major conferences on mobile, wireless, and sensor networks and systems. These conferences include:

* [http://sensys.acm.org/ SenSys]
* IPSN ([http://portal.acm.org/citation.cfm?id=984626&coll=portal&dl=ACM&CFID=26359144&CFTOKEN=96957034 ACM Archive])
* MobiCom ([http://portal.acm.org/toc.cfm?id=SERIES395&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* MobiSys ([http://www.sigmobile.org/mobisys/2006/ 2006], [http://portal.acm.org/toc.cfm?id=SERIES11190&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* NSDI ([http://www.usenix.org/events/nsdi07/ USENIX Website])
* [http://sosp.org/ SOSP]
* OSDI ([http://www.informatik.uni-trier.de/%7Eley/db/conf/osdi/ Archive website])
* RTSS ([http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000619 IEEE Archive])
* RTAS (IEEE Archive: [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000616 part1] [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000621 part2])
* SIGCOMM ([http://www.sigcomm.org/ Website])
When choosing a paper to present, you may look through the conferences mentioned above, or view the [[List of Potential Papers|list of potential papers]].

=== August 28, 2009 - Abu Sayeed Saifullah ===

''WirelessHART''

=== September 4, 2009 - Octav Chipara ===

''Reliable Clinical Monitoring.''

=== September 11, 2009 - Yong Fu ===
<blockquote>Feedback Thermal Control for Real-time Systems</blockquote>

=== September 18, 2009 - Chengjie Wu ===

<blockquote> Miroslav Pajic and Rahul Mangharam, Anti-Jamming for Embedded Wireless Networks, IPSN 09, Apr. 2009.</blockquote>

Paper: [http://mlab.seas.upenn.edu/node/109]

=== September 25, 2009 - Weijun (Vincent) Guo ===

Paper:
<blockquote>Chen, Y., Gnawali, O., Kazandjieva, M., Levis, P., and Regehr, J. 2009. Surviving sensor network software faults. In Proceedings of the ACM SIGOPS 22nd Symposium on Operating Systems Principles (Big Sky, Montana, USA, October 11 - 14, 2009). SOSP '09. ACM, New York, NY, 235-246. DOI= http://doi.acm.org/10.1145/1629575.1629598
</blockquote>

Abstract:
<blockquote>
We describe Neutron, a version of the TinyOS operating system that efficiently recovers from memory safety bugs. Where existing schemes reboot an entire node on an error, Neutron's compiler and runtime extensions divide programs into recovery units and reboot only the faulting unit. The TinyOS kernel itself is a recovery unit: a kernel safety violation appears to applications as the processor being unavailable for 10-20 milliseconds.
 
 
Neutron further minimizes safety violation cost by supporting "precious" state that persists across reboots. Application data, time synchronization state, and routing tables can all be declared as precious. Neutron's reboot sequence conservatively checks that precious state is not the source of a fault before preserving it. Together, recovery units and precious state allow Neutron to reduce a safety violation's cost to time synchronization by 94% and to a routing protocol by 99.5%. Neutron also protects applications from losing data. Neutron provides this recovery on the very limited resources of a tiny, low-power microcontroller.
</blockquote>

Paper: [http://www.sigops.org/sosp/sosp09/papers/chen-sosp09.pdf pdf][http://www.cse.wustl.edu/wsn/images/3/3b/Surviving_Sensor_Network_Software_Faults.pptx my slides]

=== October 2, 2009 - Sisu Xi ===

=== October 9, 2009 - N/A ===
''Canceled due to RTAS deadline.''

=== October 16, 2009 - N/A ===

''Fall Break''

=== October 23, 2009 - Louis Thomas ===
* The Hitchhiker's Guide to Successful Wireless Sensor Network Deployments" by Barrenetxea et al.
** Link: http://www.csce.uark.edu/~nilanb/teaching/papers/Barrenetxea.pdf

=== October 30, 2009 - N/A ===
''Canceled due to IPSN deadline''

=== November 6, 2009 - Mo Sha ===

=== November 13, 2009 - Yong Fu ===

=== November 20, 2009 - Greg Hackmann ===

<blockquote>RACNet: A High-Fidelity Data Center Sensing Network. Chieh-Jan Mike Liang, Jie Liu, Liqian Luo, Andreas Terzis, Feng Zhao. SenSys 2009.
</blockquote>

Links: [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet.pdf Paper], [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet_Slides.pdf Slides]

=== November 27, 2009 - N/A ===
''Thanksgiving Break''

=== December 4, 2009 - Chien-Liang Fok ===

<blockquote>Ramanathan, N., Schoellhammer, T., Kohler, E., Whitehouse, K., Harmon,
T., and Estrin, D. 2009. Suelo: human-assisted sensing for exploratory
soil monitoring studies. In Proceedings of the 7th ACM Conference on
Embedded Networked Sensor Systems (Berkeley, California, November 04 -
06, 2009). SenSys '09. ACM, New York, NY, 197-210. DOI=
http://doi.acm.org/10.1145/1644038.1644058</blockquote>

=== December 11, 2009 - Abu Sayeed Saifullah ===

=== December 18, 2009 - N/A ===

''Winter Break''

==Previous Semesters==
* [[Seminar Summer 2009|Summer 2009]]
* [[Seminar Spring 2009|Spring 2009]]
* [[Seminar Fall 2008|Fall 2008]]
* [[Seminar Summer 2008|Summer 2008]]
* [[Seminar Spring 2008|Spring 2008]]
* [[Fall 2007]]
* [[Summer 2007]]
* [[Spring 2007]]
* [[Fall 2006]]
* [[Spring 2006]]
* [[Fall 2005]]
* [[Spring 2005]]
* [[Fall 2004]]
* [[Spring 2004]]
* [[Fall 2003]]
* [[Spring 2003]]
* [[Fall 2002]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2002.html Spring 2002]
* [http://userfs.cec.wustl.edu/~cs673/fall.2001.html Fall 2001]
* [http://userfs.cec.wustl.edu/~cs673/spring.2001.html Spring 2001]
* [[Fall 2000]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2000.html Spring 2000]
* [http://cec.wustl.edu/~cs673/backUp/fall.1998.html Fall 1998]
* [http://cec.wustl.edu/~cs673/backUp/spring.1998.html Spring 1998]

CSE730x Research Seminar

2009-12-24T02:34:57Z

Liangfok: /* September 25, 2009 - Weijun (Vincent) Guo */

{| align="right"
| __TOC__
|}

* '''Instructors:''' [http://www.cse.wustl.edu/~lu Chenyang Lu] and [http://www.cse.wustl.edu/~roman Gruia-Catalin Roman]
* '''Time: Friday at 2-3:30pm, Location: Bryan 509C'''

This seminar examines fundamental and emerging concepts in concurrency and distribution by studying seminal papers and recent research results. Broad topics of interest include models of concurrency, mobile computing, parallel architectures, sensor networks, distributed algorithms, and specialized protocols. Each semester, the seminar emphasizes different themes reflecting the current research interests of the participants.

The theme of this semester's seminar is Wireless Sensor Networks. We will read and discuss papers from recent major conferences on mobile, wireless, and sensor networks and systems. These conferences include:

* [http://sensys.acm.org/ SenSys]
* IPSN ([http://portal.acm.org/citation.cfm?id=984626&coll=portal&dl=ACM&CFID=26359144&CFTOKEN=96957034 ACM Archive])
* MobiCom ([http://portal.acm.org/toc.cfm?id=SERIES395&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* MobiSys ([http://www.sigmobile.org/mobisys/2006/ 2006], [http://portal.acm.org/toc.cfm?id=SERIES11190&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* NSDI ([http://www.usenix.org/events/nsdi07/ USENIX Website])
* [http://sosp.org/ SOSP]
* OSDI ([http://www.informatik.uni-trier.de/%7Eley/db/conf/osdi/ Archive website])
* RTSS ([http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000619 IEEE Archive])
* RTAS (IEEE Archive: [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000616 part1] [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000621 part2])
* SIGCOMM ([http://www.sigcomm.org/ Website])
When choosing a paper to present, you may look through the conferences mentioned above, or view the [[List of Potential Papers|list of potential papers]].

=== August 28, 2009 - Abu Sayeed Saifullah ===

''WirelessHART''

=== September 4, 2009 - Octav Chipara ===

''Reliable Clinical Monitoring.''

=== September 11, 2009 - Yong Fu ===
<blockquote>Feedback Thermal Control for Real-time Systems</blockquote>

=== September 18, 2009 - Chengjie Wu ===

<blockquote> Miroslav Pajic and Rahul Mangharam, Anti-Jamming for Embedded Wireless Networks, IPSN 09, Apr. 2009.</blockquote>

Paper: [http://mlab.seas.upenn.edu/node/109]

=== September 25, 2009 - Weijun (Vincent) Guo ===

Paper:
<blockquote>Chen, Y., Gnawali, O., Kazandjieva, M., Levis, P., and Regehr, J. 2009. Surviving sensor network software faults. In Proceedings of the ACM SIGOPS 22nd Symposium on Operating Systems Principles (Big Sky, Montana, USA, October 11 - 14, 2009). SOSP '09. ACM, New York, NY, 235-246. DOI= http://doi.acm.org/10.1145/1629575.1629598
</blockquote>

Abstract
<blockquote>
We describe Neutron, a version of the TinyOS operating system that efficiently recovers from memory safety bugs. Where existing schemes reboot an entire node on an error, Neutron's compiler and runtime extensions divide programs into recovery units and reboot only the faulting unit. The TinyOS kernel itself is a recovery unit: a kernel safety violation appears to applications as the processor being unavailable for 10-20 milliseconds.

Neutron further minimizes safety violation cost by supporting "precious" state that persists across reboots. Application data, time synchronization state, and routing tables can all be declared as precious. Neutron's reboot sequence conservatively checks that precious state is not the source of a fault before preserving it. Together, recovery units and precious state allow Neutron to reduce a safety violation's cost to time synchronization by 94% and to a routing protocol by 99.5%. Neutron also protects applications from losing data. Neutron provides this recovery on the very limited resources of a tiny, low-power microcontroller.
</blockquote>

Paper: [http://www.sigops.org/sosp/sosp09/papers/chen-sosp09.pdf pdf][http://www.cse.wustl.edu/wsn/images/3/3b/Surviving_Sensor_Network_Software_Faults.pptx my slides]

=== October 2, 2009 - Sisu Xi ===

=== October 9, 2009 - N/A ===
''Canceled due to RTAS deadline.''

=== October 16, 2009 - N/A ===

''Fall Break''

=== October 23, 2009 - Louis Thomas ===
* The Hitchhiker's Guide to Successful Wireless Sensor Network Deployments" by Barrenetxea et al.
** Link: http://www.csce.uark.edu/~nilanb/teaching/papers/Barrenetxea.pdf

=== October 30, 2009 - N/A ===
''Canceled due to IPSN deadline''

=== November 6, 2009 - Mo Sha ===

=== November 13, 2009 - Yong Fu ===

=== November 20, 2009 - Greg Hackmann ===

<blockquote>RACNet: A High-Fidelity Data Center Sensing Network. Chieh-Jan Mike Liang, Jie Liu, Liqian Luo, Andreas Terzis, Feng Zhao. SenSys 2009.
</blockquote>

Links: [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet.pdf Paper], [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet_Slides.pdf Slides]

=== November 27, 2009 - N/A ===
''Thanksgiving Break''

=== December 4, 2009 - Chien-Liang Fok ===

<blockquote>Ramanathan, N., Schoellhammer, T., Kohler, E., Whitehouse, K., Harmon,
T., and Estrin, D. 2009. Suelo: human-assisted sensing for exploratory
soil monitoring studies. In Proceedings of the 7th ACM Conference on
Embedded Networked Sensor Systems (Berkeley, California, November 04 -
06, 2009). SenSys '09. ACM, New York, NY, 197-210. DOI=
http://doi.acm.org/10.1145/1644038.1644058</blockquote>

=== December 11, 2009 - Abu Sayeed Saifullah ===

=== December 18, 2009 - N/A ===

''Winter Break''

==Previous Semesters==
* [[Seminar Summer 2009|Summer 2009]]
* [[Seminar Spring 2009|Spring 2009]]
* [[Seminar Fall 2008|Fall 2008]]
* [[Seminar Summer 2008|Summer 2008]]
* [[Seminar Spring 2008|Spring 2008]]
* [[Fall 2007]]
* [[Summer 2007]]
* [[Spring 2007]]
* [[Fall 2006]]
* [[Spring 2006]]
* [[Fall 2005]]
* [[Spring 2005]]
* [[Fall 2004]]
* [[Spring 2004]]
* [[Fall 2003]]
* [[Spring 2003]]
* [[Fall 2002]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2002.html Spring 2002]
* [http://userfs.cec.wustl.edu/~cs673/fall.2001.html Fall 2001]
* [http://userfs.cec.wustl.edu/~cs673/spring.2001.html Spring 2001]
* [[Fall 2000]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2000.html Spring 2000]
* [http://cec.wustl.edu/~cs673/backUp/fall.1998.html Fall 1998]
* [http://cec.wustl.edu/~cs673/backUp/spring.1998.html Spring 1998]

CSE730x Research Seminar

2009-12-24T02:34:41Z

Liangfok: /* September 25, 2009 - Weijun (Vincent) Guo */

{| align="right"
| __TOC__
|}

* '''Instructors:''' [http://www.cse.wustl.edu/~lu Chenyang Lu] and [http://www.cse.wustl.edu/~roman Gruia-Catalin Roman]
* '''Time: Friday at 2-3:30pm, Location: Bryan 509C'''

This seminar examines fundamental and emerging concepts in concurrency and distribution by studying seminal papers and recent research results. Broad topics of interest include models of concurrency, mobile computing, parallel architectures, sensor networks, distributed algorithms, and specialized protocols. Each semester, the seminar emphasizes different themes reflecting the current research interests of the participants.

The theme of this semester's seminar is Wireless Sensor Networks. We will read and discuss papers from recent major conferences on mobile, wireless, and sensor networks and systems. These conferences include:

* [http://sensys.acm.org/ SenSys]
* IPSN ([http://portal.acm.org/citation.cfm?id=984626&coll=portal&dl=ACM&CFID=26359144&CFTOKEN=96957034 ACM Archive])
* MobiCom ([http://portal.acm.org/toc.cfm?id=SERIES395&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* MobiSys ([http://www.sigmobile.org/mobisys/2006/ 2006], [http://portal.acm.org/toc.cfm?id=SERIES11190&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* NSDI ([http://www.usenix.org/events/nsdi07/ USENIX Website])
* [http://sosp.org/ SOSP]
* OSDI ([http://www.informatik.uni-trier.de/%7Eley/db/conf/osdi/ Archive website])
* RTSS ([http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000619 IEEE Archive])
* RTAS (IEEE Archive: [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000616 part1] [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000621 part2])
* SIGCOMM ([http://www.sigcomm.org/ Website])
When choosing a paper to present, you may look through the conferences mentioned above, or view the [[List of Potential Papers|list of potential papers]].

=== August 28, 2009 - Abu Sayeed Saifullah ===

''WirelessHART''

=== September 4, 2009 - Octav Chipara ===

''Reliable Clinical Monitoring.''

=== September 11, 2009 - Yong Fu ===
<blockquote>Feedback Thermal Control for Real-time Systems</blockquote>

=== September 18, 2009 - Chengjie Wu ===

<blockquote> Miroslav Pajic and Rahul Mangharam, Anti-Jamming for Embedded Wireless Networks, IPSN 09, Apr. 2009.</blockquote>

Paper: [http://mlab.seas.upenn.edu/node/109]

=== September 25, 2009 - Weijun (Vincent) Guo ===

Paper:
<blockquote>Chen, Y., Gnawali, O., Kazandjieva, M., Levis, P., and Regehr, J. 2009. Surviving sensor network software faults. In Proceedings of the ACM SIGOPS 22nd Symposium on Operating Systems Principles (Big Sky, Montana, USA, October 11 - 14, 2009). SOSP '09. ACM, New York, NY, 235-246. DOI= http://doi.acm.org/10.1145/1629575.1629598
<blockquote>

Abstract
<blockquote>
We describe Neutron, a version of the TinyOS operating system that efficiently recovers from memory safety bugs. Where existing schemes reboot an entire node on an error, Neutron's compiler and runtime extensions divide programs into recovery units and reboot only the faulting unit. The TinyOS kernel itself is a recovery unit: a kernel safety violation appears to applications as the processor being unavailable for 10-20 milliseconds.

Neutron further minimizes safety violation cost by supporting "precious" state that persists across reboots. Application data, time synchronization state, and routing tables can all be declared as precious. Neutron's reboot sequence conservatively checks that precious state is not the source of a fault before preserving it. Together, recovery units and precious state allow Neutron to reduce a safety violation's cost to time synchronization by 94% and to a routing protocol by 99.5%. Neutron also protects applications from losing data. Neutron provides this recovery on the very limited resources of a tiny, low-power microcontroller.
</blockquote>

Paper: [http://www.sigops.org/sosp/sosp09/papers/chen-sosp09.pdf pdf][http://www.cse.wustl.edu/wsn/images/3/3b/Surviving_Sensor_Network_Software_Faults.pptx my slides]

=== October 2, 2009 - Sisu Xi ===

=== October 9, 2009 - N/A ===
''Canceled due to RTAS deadline.''

=== October 16, 2009 - N/A ===

''Fall Break''

=== October 23, 2009 - Louis Thomas ===
* The Hitchhiker's Guide to Successful Wireless Sensor Network Deployments" by Barrenetxea et al.
** Link: http://www.csce.uark.edu/~nilanb/teaching/papers/Barrenetxea.pdf

=== October 30, 2009 - N/A ===
''Canceled due to IPSN deadline''

=== November 6, 2009 - Mo Sha ===

=== November 13, 2009 - Yong Fu ===

=== November 20, 2009 - Greg Hackmann ===

<blockquote>RACNet: A High-Fidelity Data Center Sensing Network. Chieh-Jan Mike Liang, Jie Liu, Liqian Luo, Andreas Terzis, Feng Zhao. SenSys 2009.
</blockquote>

Links: [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet.pdf Paper], [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet_Slides.pdf Slides]

=== November 27, 2009 - N/A ===
''Thanksgiving Break''

=== December 4, 2009 - Chien-Liang Fok ===

<blockquote>Ramanathan, N., Schoellhammer, T., Kohler, E., Whitehouse, K., Harmon,
T., and Estrin, D. 2009. Suelo: human-assisted sensing for exploratory
soil monitoring studies. In Proceedings of the 7th ACM Conference on
Embedded Networked Sensor Systems (Berkeley, California, November 04 -
06, 2009). SenSys '09. ACM, New York, NY, 197-210. DOI=
http://doi.acm.org/10.1145/1644038.1644058</blockquote>

=== December 11, 2009 - Abu Sayeed Saifullah ===

=== December 18, 2009 - N/A ===

''Winter Break''

==Previous Semesters==
* [[Seminar Summer 2009|Summer 2009]]
* [[Seminar Spring 2009|Spring 2009]]
* [[Seminar Fall 2008|Fall 2008]]
* [[Seminar Summer 2008|Summer 2008]]
* [[Seminar Spring 2008|Spring 2008]]
* [[Fall 2007]]
* [[Summer 2007]]
* [[Spring 2007]]
* [[Fall 2006]]
* [[Spring 2006]]
* [[Fall 2005]]
* [[Spring 2005]]
* [[Fall 2004]]
* [[Spring 2004]]
* [[Fall 2003]]
* [[Spring 2003]]
* [[Fall 2002]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2002.html Spring 2002]
* [http://userfs.cec.wustl.edu/~cs673/fall.2001.html Fall 2001]
* [http://userfs.cec.wustl.edu/~cs673/spring.2001.html Spring 2001]
* [[Fall 2000]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2000.html Spring 2000]
* [http://cec.wustl.edu/~cs673/backUp/fall.1998.html Fall 1998]
* [http://cec.wustl.edu/~cs673/backUp/spring.1998.html Spring 1998]

Seminar Fall 2008

2009-12-24T01:41:37Z

Liangfok: /* November 21, 2008 - Yong Fu */

=== September 12, 2008 - Sangeeta Bhattacharya ===

<blockquote>Lorincz, K., Chen, B., Waterman, J., Werner-Allen, G., and Welsh, M.
2008. Resource aware programming in the Pixie OS. In Proceedings of
the 6th ACM Conference on Embedded Network Sensor Systems (Raleigh,
NC, USA, November 05 - 07, 2008). SenSys '08. ACM, New York, NY,
211-224. DOI= http://doi.acm.org/10.1145/1460412.1460434</blockquote>

=== September 19, 2008 - Greg Hackmann ===

<pre>
A Measurement Study of Vehicular Internet Access Using In Situ Wi-Fi Networks.
Vladimir Bychkovsky, Bret Hull, Allen K. Miu, Hari Balakrishnan, Samuel Madden.
MobiCom 2006.
</pre>

Links: [http://nms.lcs.mit.edu/papers/meas-mobicom06.pdf Paper] [http://nms.lcs.mit.edu/papers/meas-mobicom06.ppt Slides]

=== September 26, 2008 - Yong Fu ===
Paper:
<blockquote>
Gong Chen, Wenbo He, Jie Liu, Suman Nath, Leonidas Rigas, Lin Xiao, and Feng Zhao,
"Energy-Aware Server Provisioning and Load Dispatching for Connection-Intensive Internet Services"
NSDI 2008, San Francisco, CA, April 2008.
</blockquote>

Abstract:
<blockquote>Energy consumption in hosting Internet services is becoming a pressing issue as these services scale up. Dynamic server provisioning techniques are effective in turning off unnecessary servers to save energy. Such techniques, mostly studied for request-response services, face challenges in the context of connection servers that host a large number of long-lived TCP connections. In this paper, we characterize unique properties, performance, and power models of connection servers, based on a real data trace collected from the deployed Windows Live Messenger. Using the models, we design server provisioning and load dispatching algorithms and study subtle interactions between them. We show that our algorithms can save a significant amount of energy without sacrificing user experiences.</blockquote>

Links: [http://research.microsoft.com/~liuj/publications/provisioning-nsdi08.pdf Paper] [http://research.microsoft.com/~liuj/publications/provisioning-nsdi08.pptx Slides]

=== October 3, 2008 - Vincent Guo ===
Paper:

<blockquote>A Measurement Study of Interference Modeling and Scheduling in Low Power Wireless Networks. Ritesh Maheshwari (Stony Brook University, US); Shweta Jain (Staccato Communications, US); Samir Das (Stony Brook University, US). SenSys'08.</blockquote>

Abstract:

<blockquote>Accurate interference models are important for use in transmission scheduling algorithms in wireless networks. In this work, we perform extensive modeling and experimentation on two 20-node TelosB motes testbeds { one indoor and the otheroutdoor { to compare a suite of interference models for their modeling accuracies. We ¯rst empirically build and validate the physical interference model via a packet reception rate vs. SINR relationship using a measurement driven method. We then similarly instantiate other simpler models,such as hop-based, range-based, prot-
ocol model,etc. The modeling accuracies are then evaluated on the two testbeds using transmission scheduling exper-
iments. We observe that while the physicalinterference model is the most accurate, it is still far from perfect,
providing a 90-percentile error about 20-25% (and 80 percentile error 7-12%),depending on the scenario. The accura-
cy of the other models is worse and scenario-speci¯c. The second best model trails the physical model by roughly
12-18 percentile points for similar accuracy targets. Somewhat similar throughput performance di®erential between
models is also observed when used with greedy scheduling algorithms. Carrying on further, we look closely into the
the two incarnations of the physical model {`thresholded'(conservative, but typically considered in literature)
and `graded' (more realistic). We show via solving the one shot scheduling problem, that the graded version can
improve `expected throughput' over the thresholded version by scheduling imperfect links.
</blockquote>

Links: [http://www.wings.cs.sunysb.edu/~ritesh/Papers/Ritesh-Sensys08-Interference.pdf Paper], [http://www.cse.wustl.edu/wsn/images/3/3f/A_measurement_study_of_interference_modeling_and_scheduling_in_LPWN_2.odp Slides] (open document format)

=== October 10, 2008 - Chengjie Wu ===
Paper:
<blockquote>
Hui, J. W. and Culler, D. E. 2008. IP is dead, long live IP for wireless sensor networks. In Proceedings of the 6th ACM Conference on Embedded Network Sensor Systems (Raleigh, NC, USA, November 05 - 07, 2008). SenSys '08. ACM, New York, NY, 15-28. DOI= http://doi.acm.org/10.1145/1460412.1460415
</blockquote>

Abstract:
<blockquote>
A decade ago as wireless sensor network research took off many researchers in the field denounced the use of IP as inadequate and in contradiction to the needs of wireless sensor networking. Since then the field has matured, standard links have emerged, and IP has evolved. In this paper, we present the design of a complete IPv6-based network architecture for wireless sensor networks. We validate the architecture with a production-quality implementation that incorporates many techniques pioneered in the sensor network community, including duty-cycled link protocols, header compression, hop-by-hop forwarding, and efficient routing with effective link estimation. In addition to providing interoperability with existing IP devices, this implementation was able to achieve an average duty-cycle of 0.65%, average per-hop latency of 62ms, and a data reception rate of 99.98% over a period of 4 weeks in a real-world home-monitoring application where each node generates one application packet per minute. Our results outperform existing systems that do not adhere to any particular standard or architecture. In light of this demonstration of full IPv6 capability, we review the central arguments that led the field away from IP. We believe that the presence of an architecture, specifically an IPv6-based one, provides a strong foundation for wireless sensor networks going forward.
</blockquote>

Links: [http://www.cs.berkeley.edu/~jwhui/pubs/jhui-sensys08-ipv6.pdf Paper]

=== October 17, 2008 - N/A ===

''Fall Break''

=== October 24, 2008 - Justin Luner ===
Paper:
<blockquote>
Dutta, P. and Culler, D. 2008. Practical asynchronous neighbor discovery and rendezvous for mobile sensing applications. In Proceedings of the 6th ACM Conference on Embedded Network Sensor Systems (Raleigh, NC, USA, November 05 - 07, 2008). SenSys '08. ACM, New York, NY, 71-84. DOI= http://doi.acm.org/10.1145/1460412.1460420
</blockquote>

Abstract:
<blockquote>
We present Disco, an asynchronous neighbor discovery and rendezvous protocol that allows two or more nodes to operate their radios at low duty cycles (e.g. 1%) and yet still discover and communicate with one another during infrequent, opportunistic encounters without requiring any prior synchronization information. The key challenge is to operate the radio at a low duty cycle but still ensure that discovery is fast, reliable, and predictable over a range of operating conditions. Disco nodes pick a pair of prime numbers such that the sum of their reciprocals is equal to the desired radio duty cycle. Each node increments a local counter with a globallyfixed period. If a node's local counter value is divisible by either of its primes, then the node turns on its radio for one period. This protocol ensures that two nodes will have some overlapping radio on-time within a bounded number of periods, even if nodes independently set their own duty cycle. Once a neighbor is discovered, and its wakeup schedule known, rendezvous is just a matter of being awake during the neighbor's next wakeup period,for synchronous rendezvous, or during an overlapping wake period, for asynchronous rendezvous.
</blockquote>

Links: [http://www.cs.berkeley.edu/~prabal/pubs/papers/dutta08disco.pdf Paper]

=== October 31, 2008 - Octav Chipara ===

Paper:
<blockquote>G. Zhou, J. Liu, C. Wan, M. Yarvis, and J. Stankovic, BodyQoS: Adaptive and Radio-Agnostic QoS for Body Sensor Networks, Infocom, April 2008. </blockquote>

Abstract:
<blockquote>As wireless devices and sensors are increasingly
deployed on people, researchers have begun to focus on wireless
body-area networks. Applications of wireless body sensor networks
include healthcare, entertainment, and personal assistance,
in which sensors collect physiological and activity data from
people and their environments. In these body sensor networks,
quality of service is needed to provide reliable data communication
over prioritized data streams. This paper proposes BodyQoS,
the first running QoS system demonstrated on an emulated body
sensor network. BodyQoS adopts an asymmetric architecture, in
which most processing is done on a resource rich aggregator,
minimizing the load on resource limited sensor nodes. A virtual
MAC is developed in BodyQoS to make it radio-agnostic, allowing
a BodyQoS to schedule wireless resources without knowing
the implementation details of the underlying MAC protocols.
Another unique property of BodyQoS is its ability to provide
adaptive resource scheduling. When the effective bandwidth of
the channel degrades due to RF interference or body fading
effect, BodyQoS adaptively schedules remaining bandwidth to
meet QoS requirements. We have implemented BodyQoS in NesC
on top of TinyOS, and evaluated its performance on MicaZ
devices. Our system performance study shows that BodyQoS
delivers significantly improved performance over conventional
solutions in combating channel impairment.</blockquote>

Links: [http://www.cs.virginia.edu/~stankovic/psfiles/BodyQoS-1.pdf Paper]

=== November 7, 2008 - Sangeeta Bhattacharya ===

Paper:
<blockquote>Shah, R. C., Nachman, L., and Wan, C. 2008. On the performance of Bluetooth and IEEE 802.15.4 radios in a body area network. In Proceedings of the ICST 3rd international Conference on Body Area Networks (Tempe, Arizona, March 13 - 17, 2008). ICST (Institute for Computer Sciences Social-Informatics and Telecommunications Engineering), ICST, Brussels, Belgium, 1-9. </blockquote>

Abstract:
<blockquote>The last few years have seen the emergence of many applications such as wellness, chronic disease management and assisted living that require pervasive sensing of people and the environment. Many of these applications require on-body sensing of various parameters including heart-rate, caloric burn, activity, temperature, etc. Low power wireless technologies are a key enabler for these applications, as it allows distributed sensing and aggregation without the cost of wiring the individual. Bluetooth is a well established low power wireless technology and has the advantage of being integrated into many handheld devices today whereas IEEE 802.15.4 has gained momentum in wireless sensor networks over the last few years due to its low power and cost. The performance of these radios in the context of WSN applications has been explored and published in numerous papers. However there hasn't been a lot of work exploring the effect of the human body on the performance of these radios. We have designed and conducted experiments on multiple people to measure the effect of the human body on the performance of Bluetooth and IEEE 802.15.4. We have explored different activities (sitting, standing and walking) as well as many sensor locations (ear, chest, waist, knee and ankle). Finally we explored the co-existence of both of these radios. In this paper, we present the results of these experiments and provide a detailed analysis of the suitability of these radios for body area networks.</blockquote>

Links: [http://portal.acm.org/citation.cfm?id=1460291# Paper]

=== November 14, 2008 - Greg Hackmann ===

<pre>
NAWMS: Nonintrusive Autonomous Water Monitoring System.
Younghun Kim, Thomas Schmid, Zainul M. Charbiwala, Jonathan Friedman, Mani B. Srivastava.
SenSys '08.
</pre>

Links: [http://nesl.ee.ucla.edu/~neslfw/documents/conference/2008/fp1569121580-kim.pdf Paper] [http://nesl.ee.ucla.edu/~neslfw/documents/slides/2008/Sensys2008_NAWMS.pdf Slides]

=== November 21, 2008 - Yong Fu===
Paper:
<blockquote>
Padala, P., Shin, K. G., Zhu, X., Uysal, M., Wang, Z., Singhal, S., Merchant, A., and Salem, K. 2007. Adaptive control of virtualized resources in utility computing environments. In Proceedings of the 2nd ACM Sigops/Eurosys European Conference on Computer Systems 2007 (Lisbon, Portugal, March 21 - 23, 2007). EuroSys '07. ACM, New York, NY, 289-302. DOI= http://doi.acm.org/10.1145/1272996.1273026
</blockquote>

Abstract:
<blockquote>
Data centers are often under-utilized due to over-provisioning as well as time-varying resource demands of typical enterprise applications. One approach to increase resource utilization is to consolidate applications in a shared infrastructure using virtualization. Meeting application-level quality of service (QoS) goals becomes a challenge in a consolidated environment as application resource needs differ. Furthermore, for multi-tier applications, the amount of resources needed to achieve their QoS goals might be different at each tier and may also depend on availability of resources in other tiers. In this paper, we develop an adaptive resource control system that dynamically adjusts the resource shares to individual tiers in order to meet application-level QoS goals while achieving high resource utilization in the data center. Our control system is developed using classical control theory, and we used a black-box system modeling approach to overcome the absence of first principle models for complex enterprise applications and systems. To evaluate our controllers, we built a testbed simulating a virtual data center using Xen virtual machines. We experimented with two multi-tier applications in this virtual data center: a two-tier implementation of RUBiS, an online auction site, and a two-tier Java implementation of TPC-W. Our results indicate that the proposed control system is able to maintain high resource utilization and meets QoS goals in spite of varying resource demands from the applications.
</blockquote>

Links: [[media:virtual-eurosys07.pdf|Paper]], [http://classes.cec.wustl.edu/~cse730/slides/eurosys07.ppt Slides]

=== November 28, 2008 - N/A ===

''Thanksgiving''

=== December 5, 2008 - Vincent Guo ===
<pre>
The Beta Factor: Measuring Wireless Link Burstiness. Kannan Srinivasan (Stanford University, US);
Maria Kazandjieva; Saatvik Agarwal; Philip Levis (Stanford, US). SenSys'08.
</pre>

links:[http://sing.stanford.edu/pubs/sensys08-beta.pdf paper]

=== December 12, 2008 - N/A ===

=== December 19, 2008 - Chengjie Wu ===

<pre>
Passive diagnosis for wireless sensor networks.
Kebin Liu, Mo Li, Yunhao Liu, Minglu Li, Zhongwen Guo, Feng Hong.
SenSys 2008.
</pre>

Links: [[http://delivery.acm.org/10.1145/1470000/1460424/p113-liu.pdf?key1=1460424&key2=9308509221&coll=GUIDE&dl=GUIDE&CFID=14316947&CFTOKEN=76055040 Paper]]

''Winter Break''

Seminar Fall 2008

2009-12-24T01:33:12Z

Liangfok: /* October 24, 2008 - Justin Luner */

=== September 12, 2008 - Sangeeta Bhattacharya ===

<blockquote>Lorincz, K., Chen, B., Waterman, J., Werner-Allen, G., and Welsh, M.
2008. Resource aware programming in the Pixie OS. In Proceedings of
the 6th ACM Conference on Embedded Network Sensor Systems (Raleigh,
NC, USA, November 05 - 07, 2008). SenSys '08. ACM, New York, NY,
211-224. DOI= http://doi.acm.org/10.1145/1460412.1460434</blockquote>

=== September 19, 2008 - Greg Hackmann ===

<pre>
A Measurement Study of Vehicular Internet Access Using In Situ Wi-Fi Networks.
Vladimir Bychkovsky, Bret Hull, Allen K. Miu, Hari Balakrishnan, Samuel Madden.
MobiCom 2006.
</pre>

Links: [http://nms.lcs.mit.edu/papers/meas-mobicom06.pdf Paper] [http://nms.lcs.mit.edu/papers/meas-mobicom06.ppt Slides]

=== September 26, 2008 - Yong Fu ===
Paper:
<blockquote>
Gong Chen, Wenbo He, Jie Liu, Suman Nath, Leonidas Rigas, Lin Xiao, and Feng Zhao,
"Energy-Aware Server Provisioning and Load Dispatching for Connection-Intensive Internet Services"
NSDI 2008, San Francisco, CA, April 2008.
</blockquote>

Abstract:
<blockquote>Energy consumption in hosting Internet services is becoming a pressing issue as these services scale up. Dynamic server provisioning techniques are effective in turning off unnecessary servers to save energy. Such techniques, mostly studied for request-response services, face challenges in the context of connection servers that host a large number of long-lived TCP connections. In this paper, we characterize unique properties, performance, and power models of connection servers, based on a real data trace collected from the deployed Windows Live Messenger. Using the models, we design server provisioning and load dispatching algorithms and study subtle interactions between them. We show that our algorithms can save a significant amount of energy without sacrificing user experiences.</blockquote>

Links: [http://research.microsoft.com/~liuj/publications/provisioning-nsdi08.pdf Paper] [http://research.microsoft.com/~liuj/publications/provisioning-nsdi08.pptx Slides]

=== October 3, 2008 - Vincent Guo ===
Paper:

<blockquote>A Measurement Study of Interference Modeling and Scheduling in Low Power Wireless Networks. Ritesh Maheshwari (Stony Brook University, US); Shweta Jain (Staccato Communications, US); Samir Das (Stony Brook University, US). SenSys'08.</blockquote>

Abstract:

<blockquote>Accurate interference models are important for use in transmission scheduling algorithms in wireless networks. In this work, we perform extensive modeling and experimentation on two 20-node TelosB motes testbeds { one indoor and the otheroutdoor { to compare a suite of interference models for their modeling accuracies. We ¯rst empirically build and validate the physical interference model via a packet reception rate vs. SINR relationship using a measurement driven method. We then similarly instantiate other simpler models,such as hop-based, range-based, prot-
ocol model,etc. The modeling accuracies are then evaluated on the two testbeds using transmission scheduling exper-
iments. We observe that while the physicalinterference model is the most accurate, it is still far from perfect,
providing a 90-percentile error about 20-25% (and 80 percentile error 7-12%),depending on the scenario. The accura-
cy of the other models is worse and scenario-speci¯c. The second best model trails the physical model by roughly
12-18 percentile points for similar accuracy targets. Somewhat similar throughput performance di®erential between
models is also observed when used with greedy scheduling algorithms. Carrying on further, we look closely into the
the two incarnations of the physical model {`thresholded'(conservative, but typically considered in literature)
and `graded' (more realistic). We show via solving the one shot scheduling problem, that the graded version can
improve `expected throughput' over the thresholded version by scheduling imperfect links.
</blockquote>

Links: [http://www.wings.cs.sunysb.edu/~ritesh/Papers/Ritesh-Sensys08-Interference.pdf Paper], [http://www.cse.wustl.edu/wsn/images/3/3f/A_measurement_study_of_interference_modeling_and_scheduling_in_LPWN_2.odp Slides] (open document format)

=== October 10, 2008 - Chengjie Wu ===
Paper:
<blockquote>
Hui, J. W. and Culler, D. E. 2008. IP is dead, long live IP for wireless sensor networks. In Proceedings of the 6th ACM Conference on Embedded Network Sensor Systems (Raleigh, NC, USA, November 05 - 07, 2008). SenSys '08. ACM, New York, NY, 15-28. DOI= http://doi.acm.org/10.1145/1460412.1460415
</blockquote>

Abstract:
<blockquote>
A decade ago as wireless sensor network research took off many researchers in the field denounced the use of IP as inadequate and in contradiction to the needs of wireless sensor networking. Since then the field has matured, standard links have emerged, and IP has evolved. In this paper, we present the design of a complete IPv6-based network architecture for wireless sensor networks. We validate the architecture with a production-quality implementation that incorporates many techniques pioneered in the sensor network community, including duty-cycled link protocols, header compression, hop-by-hop forwarding, and efficient routing with effective link estimation. In addition to providing interoperability with existing IP devices, this implementation was able to achieve an average duty-cycle of 0.65%, average per-hop latency of 62ms, and a data reception rate of 99.98% over a period of 4 weeks in a real-world home-monitoring application where each node generates one application packet per minute. Our results outperform existing systems that do not adhere to any particular standard or architecture. In light of this demonstration of full IPv6 capability, we review the central arguments that led the field away from IP. We believe that the presence of an architecture, specifically an IPv6-based one, provides a strong foundation for wireless sensor networks going forward.
</blockquote>

Links: [http://www.cs.berkeley.edu/~jwhui/pubs/jhui-sensys08-ipv6.pdf Paper]

=== October 17, 2008 - N/A ===

''Fall Break''

=== October 24, 2008 - Justin Luner ===
Paper:
<blockquote>
Dutta, P. and Culler, D. 2008. Practical asynchronous neighbor discovery and rendezvous for mobile sensing applications. In Proceedings of the 6th ACM Conference on Embedded Network Sensor Systems (Raleigh, NC, USA, November 05 - 07, 2008). SenSys '08. ACM, New York, NY, 71-84. DOI= http://doi.acm.org/10.1145/1460412.1460420
</blockquote>

Abstract:
<blockquote>
We present Disco, an asynchronous neighbor discovery and rendezvous protocol that allows two or more nodes to operate their radios at low duty cycles (e.g. 1%) and yet still discover and communicate with one another during infrequent, opportunistic encounters without requiring any prior synchronization information. The key challenge is to operate the radio at a low duty cycle but still ensure that discovery is fast, reliable, and predictable over a range of operating conditions. Disco nodes pick a pair of prime numbers such that the sum of their reciprocals is equal to the desired radio duty cycle. Each node increments a local counter with a globallyfixed period. If a node's local counter value is divisible by either of its primes, then the node turns on its radio for one period. This protocol ensures that two nodes will have some overlapping radio on-time within a bounded number of periods, even if nodes independently set their own duty cycle. Once a neighbor is discovered, and its wakeup schedule known, rendezvous is just a matter of being awake during the neighbor's next wakeup period,for synchronous rendezvous, or during an overlapping wake period, for asynchronous rendezvous.
</blockquote>

Links: [http://www.cs.berkeley.edu/~prabal/pubs/papers/dutta08disco.pdf Paper]

=== October 31, 2008 - Octav Chipara ===

Paper:
<blockquote>G. Zhou, J. Liu, C. Wan, M. Yarvis, and J. Stankovic, BodyQoS: Adaptive and Radio-Agnostic QoS for Body Sensor Networks, Infocom, April 2008. </blockquote>

Abstract:
<blockquote>As wireless devices and sensors are increasingly
deployed on people, researchers have begun to focus on wireless
body-area networks. Applications of wireless body sensor networks
include healthcare, entertainment, and personal assistance,
in which sensors collect physiological and activity data from
people and their environments. In these body sensor networks,
quality of service is needed to provide reliable data communication
over prioritized data streams. This paper proposes BodyQoS,
the first running QoS system demonstrated on an emulated body
sensor network. BodyQoS adopts an asymmetric architecture, in
which most processing is done on a resource rich aggregator,
minimizing the load on resource limited sensor nodes. A virtual
MAC is developed in BodyQoS to make it radio-agnostic, allowing
a BodyQoS to schedule wireless resources without knowing
the implementation details of the underlying MAC protocols.
Another unique property of BodyQoS is its ability to provide
adaptive resource scheduling. When the effective bandwidth of
the channel degrades due to RF interference or body fading
effect, BodyQoS adaptively schedules remaining bandwidth to
meet QoS requirements. We have implemented BodyQoS in NesC
on top of TinyOS, and evaluated its performance on MicaZ
devices. Our system performance study shows that BodyQoS
delivers significantly improved performance over conventional
solutions in combating channel impairment.</blockquote>

Links: [http://www.cs.virginia.edu/~stankovic/psfiles/BodyQoS-1.pdf Paper]

=== November 7, 2008 - Sangeeta Bhattacharya ===

Paper:
<blockquote>Shah, R. C., Nachman, L., and Wan, C. 2008. On the performance of Bluetooth and IEEE 802.15.4 radios in a body area network. In Proceedings of the ICST 3rd international Conference on Body Area Networks (Tempe, Arizona, March 13 - 17, 2008). ICST (Institute for Computer Sciences Social-Informatics and Telecommunications Engineering), ICST, Brussels, Belgium, 1-9. </blockquote>

Abstract:
<blockquote>The last few years have seen the emergence of many applications such as wellness, chronic disease management and assisted living that require pervasive sensing of people and the environment. Many of these applications require on-body sensing of various parameters including heart-rate, caloric burn, activity, temperature, etc. Low power wireless technologies are a key enabler for these applications, as it allows distributed sensing and aggregation without the cost of wiring the individual. Bluetooth is a well established low power wireless technology and has the advantage of being integrated into many handheld devices today whereas IEEE 802.15.4 has gained momentum in wireless sensor networks over the last few years due to its low power and cost. The performance of these radios in the context of WSN applications has been explored and published in numerous papers. However there hasn't been a lot of work exploring the effect of the human body on the performance of these radios. We have designed and conducted experiments on multiple people to measure the effect of the human body on the performance of Bluetooth and IEEE 802.15.4. We have explored different activities (sitting, standing and walking) as well as many sensor locations (ear, chest, waist, knee and ankle). Finally we explored the co-existence of both of these radios. In this paper, we present the results of these experiments and provide a detailed analysis of the suitability of these radios for body area networks.</blockquote>

Links: [http://portal.acm.org/citation.cfm?id=1460291# Paper]

=== November 14, 2008 - Greg Hackmann ===

<pre>
NAWMS: Nonintrusive Autonomous Water Monitoring System.
Younghun Kim, Thomas Schmid, Zainul M. Charbiwala, Jonathan Friedman, Mani B. Srivastava.
SenSys '08.
</pre>

Links: [http://nesl.ee.ucla.edu/~neslfw/documents/conference/2008/fp1569121580-kim.pdf Paper] [http://nesl.ee.ucla.edu/~neslfw/documents/slides/2008/Sensys2008_NAWMS.pdf Slides]

=== November 21, 2008 - Yong Fu===
<pre>
Adaptive Control of Virtualized Resources in Utility Computing Environments
Padala, P., Shin, K., Zhu, X., Uysal, M., Wang, Z., Singhal, S., Merchant A., Salem, K.
EuroSys 2007
</pre>

Links: [[media:virtual-eurosys07.pdf|Paper]], [http://classes.cec.wustl.edu/~cse730/slides/eurosys07.ppt Slides]

=== November 28, 2008 - N/A ===

''Thanksgiving''

=== December 5, 2008 - Vincent Guo ===
<pre>
The Beta Factor: Measuring Wireless Link Burstiness. Kannan Srinivasan (Stanford University, US);
Maria Kazandjieva; Saatvik Agarwal; Philip Levis (Stanford, US). SenSys'08.
</pre>

links:[http://sing.stanford.edu/pubs/sensys08-beta.pdf paper]

=== December 12, 2008 - N/A ===

=== December 19, 2008 - Chengjie Wu ===

<pre>
Passive diagnosis for wireless sensor networks.
Kebin Liu, Mo Li, Yunhao Liu, Minglu Li, Zhongwen Guo, Feng Hong.
SenSys 2008.
</pre>

Links: [[http://delivery.acm.org/10.1145/1470000/1460424/p113-liu.pdf?key1=1460424&key2=9308509221&coll=GUIDE&dl=GUIDE&CFID=14316947&CFTOKEN=76055040 Paper]]

''Winter Break''

Seminar Fall 2008

2009-12-24T01:28:34Z

Liangfok: /* October 10, 2008 - Chengjie Wu */

=== September 12, 2008 - Sangeeta Bhattacharya ===

<blockquote>Lorincz, K., Chen, B., Waterman, J., Werner-Allen, G., and Welsh, M.
2008. Resource aware programming in the Pixie OS. In Proceedings of
the 6th ACM Conference on Embedded Network Sensor Systems (Raleigh,
NC, USA, November 05 - 07, 2008). SenSys '08. ACM, New York, NY,
211-224. DOI= http://doi.acm.org/10.1145/1460412.1460434</blockquote>

=== September 19, 2008 - Greg Hackmann ===

<pre>
A Measurement Study of Vehicular Internet Access Using In Situ Wi-Fi Networks.
Vladimir Bychkovsky, Bret Hull, Allen K. Miu, Hari Balakrishnan, Samuel Madden.
MobiCom 2006.
</pre>

Links: [http://nms.lcs.mit.edu/papers/meas-mobicom06.pdf Paper] [http://nms.lcs.mit.edu/papers/meas-mobicom06.ppt Slides]

=== September 26, 2008 - Yong Fu ===
Paper:
<blockquote>
Gong Chen, Wenbo He, Jie Liu, Suman Nath, Leonidas Rigas, Lin Xiao, and Feng Zhao,
"Energy-Aware Server Provisioning and Load Dispatching for Connection-Intensive Internet Services"
NSDI 2008, San Francisco, CA, April 2008.
</blockquote>

Abstract:
<blockquote>Energy consumption in hosting Internet services is becoming a pressing issue as these services scale up. Dynamic server provisioning techniques are effective in turning off unnecessary servers to save energy. Such techniques, mostly studied for request-response services, face challenges in the context of connection servers that host a large number of long-lived TCP connections. In this paper, we characterize unique properties, performance, and power models of connection servers, based on a real data trace collected from the deployed Windows Live Messenger. Using the models, we design server provisioning and load dispatching algorithms and study subtle interactions between them. We show that our algorithms can save a significant amount of energy without sacrificing user experiences.</blockquote>

Links: [http://research.microsoft.com/~liuj/publications/provisioning-nsdi08.pdf Paper] [http://research.microsoft.com/~liuj/publications/provisioning-nsdi08.pptx Slides]

=== October 3, 2008 - Vincent Guo ===
Paper:

<blockquote>A Measurement Study of Interference Modeling and Scheduling in Low Power Wireless Networks. Ritesh Maheshwari (Stony Brook University, US); Shweta Jain (Staccato Communications, US); Samir Das (Stony Brook University, US). SenSys'08.</blockquote>

Abstract:

<blockquote>Accurate interference models are important for use in transmission scheduling algorithms in wireless networks. In this work, we perform extensive modeling and experimentation on two 20-node TelosB motes testbeds { one indoor and the otheroutdoor { to compare a suite of interference models for their modeling accuracies. We ¯rst empirically build and validate the physical interference model via a packet reception rate vs. SINR relationship using a measurement driven method. We then similarly instantiate other simpler models,such as hop-based, range-based, prot-
ocol model,etc. The modeling accuracies are then evaluated on the two testbeds using transmission scheduling exper-
iments. We observe that while the physicalinterference model is the most accurate, it is still far from perfect,
providing a 90-percentile error about 20-25% (and 80 percentile error 7-12%),depending on the scenario. The accura-
cy of the other models is worse and scenario-speci¯c. The second best model trails the physical model by roughly
12-18 percentile points for similar accuracy targets. Somewhat similar throughput performance di®erential between
models is also observed when used with greedy scheduling algorithms. Carrying on further, we look closely into the
the two incarnations of the physical model {`thresholded'(conservative, but typically considered in literature)
and `graded' (more realistic). We show via solving the one shot scheduling problem, that the graded version can
improve `expected throughput' over the thresholded version by scheduling imperfect links.
</blockquote>

Links: [http://www.wings.cs.sunysb.edu/~ritesh/Papers/Ritesh-Sensys08-Interference.pdf Paper], [http://www.cse.wustl.edu/wsn/images/3/3f/A_measurement_study_of_interference_modeling_and_scheduling_in_LPWN_2.odp Slides] (open document format)

=== October 10, 2008 - Chengjie Wu ===
Paper:
<blockquote>
Hui, J. W. and Culler, D. E. 2008. IP is dead, long live IP for wireless sensor networks. In Proceedings of the 6th ACM Conference on Embedded Network Sensor Systems (Raleigh, NC, USA, November 05 - 07, 2008). SenSys '08. ACM, New York, NY, 15-28. DOI= http://doi.acm.org/10.1145/1460412.1460415
</blockquote>

Abstract:
<blockquote>
A decade ago as wireless sensor network research took off many researchers in the field denounced the use of IP as inadequate and in contradiction to the needs of wireless sensor networking. Since then the field has matured, standard links have emerged, and IP has evolved. In this paper, we present the design of a complete IPv6-based network architecture for wireless sensor networks. We validate the architecture with a production-quality implementation that incorporates many techniques pioneered in the sensor network community, including duty-cycled link protocols, header compression, hop-by-hop forwarding, and efficient routing with effective link estimation. In addition to providing interoperability with existing IP devices, this implementation was able to achieve an average duty-cycle of 0.65%, average per-hop latency of 62ms, and a data reception rate of 99.98% over a period of 4 weeks in a real-world home-monitoring application where each node generates one application packet per minute. Our results outperform existing systems that do not adhere to any particular standard or architecture. In light of this demonstration of full IPv6 capability, we review the central arguments that led the field away from IP. We believe that the presence of an architecture, specifically an IPv6-based one, provides a strong foundation for wireless sensor networks going forward.
</blockquote>

Links: [http://www.cs.berkeley.edu/~jwhui/pubs/jhui-sensys08-ipv6.pdf Paper]

=== October 17, 2008 - N/A ===

''Fall Break''

=== October 24, 2008 - Justin Luner ===
<pre>
"Practical Asynchronous Neighbor Discovery and Rendezvous for Mobile Sensing Applications,"
Prabal Dutta and David Culler,
In Proceedings of the Sixth ACM Conference on Embedded Networked Sensor Systems (SenSys'08). To appear.
</pre>

Links: [http://www.cs.berkeley.edu/~prabal/pubs/papers/dutta08disco.pdf Paper]

=== October 31, 2008 - Octav Chipara ===

Paper:
<blockquote>G. Zhou, J. Liu, C. Wan, M. Yarvis, and J. Stankovic, BodyQoS: Adaptive and Radio-Agnostic QoS for Body Sensor Networks, Infocom, April 2008. </blockquote>

Abstract:
<blockquote>As wireless devices and sensors are increasingly
deployed on people, researchers have begun to focus on wireless
body-area networks. Applications of wireless body sensor networks
include healthcare, entertainment, and personal assistance,
in which sensors collect physiological and activity data from
people and their environments. In these body sensor networks,
quality of service is needed to provide reliable data communication
over prioritized data streams. This paper proposes BodyQoS,
the first running QoS system demonstrated on an emulated body
sensor network. BodyQoS adopts an asymmetric architecture, in
which most processing is done on a resource rich aggregator,
minimizing the load on resource limited sensor nodes. A virtual
MAC is developed in BodyQoS to make it radio-agnostic, allowing
a BodyQoS to schedule wireless resources without knowing
the implementation details of the underlying MAC protocols.
Another unique property of BodyQoS is its ability to provide
adaptive resource scheduling. When the effective bandwidth of
the channel degrades due to RF interference or body fading
effect, BodyQoS adaptively schedules remaining bandwidth to
meet QoS requirements. We have implemented BodyQoS in NesC
on top of TinyOS, and evaluated its performance on MicaZ
devices. Our system performance study shows that BodyQoS
delivers significantly improved performance over conventional
solutions in combating channel impairment.</blockquote>

Links: [http://www.cs.virginia.edu/~stankovic/psfiles/BodyQoS-1.pdf Paper]

=== November 7, 2008 - Sangeeta Bhattacharya ===

Paper:
<blockquote>Shah, R. C., Nachman, L., and Wan, C. 2008. On the performance of Bluetooth and IEEE 802.15.4 radios in a body area network. In Proceedings of the ICST 3rd international Conference on Body Area Networks (Tempe, Arizona, March 13 - 17, 2008). ICST (Institute for Computer Sciences Social-Informatics and Telecommunications Engineering), ICST, Brussels, Belgium, 1-9. </blockquote>

Abstract:
<blockquote>The last few years have seen the emergence of many applications such as wellness, chronic disease management and assisted living that require pervasive sensing of people and the environment. Many of these applications require on-body sensing of various parameters including heart-rate, caloric burn, activity, temperature, etc. Low power wireless technologies are a key enabler for these applications, as it allows distributed sensing and aggregation without the cost of wiring the individual. Bluetooth is a well established low power wireless technology and has the advantage of being integrated into many handheld devices today whereas IEEE 802.15.4 has gained momentum in wireless sensor networks over the last few years due to its low power and cost. The performance of these radios in the context of WSN applications has been explored and published in numerous papers. However there hasn't been a lot of work exploring the effect of the human body on the performance of these radios. We have designed and conducted experiments on multiple people to measure the effect of the human body on the performance of Bluetooth and IEEE 802.15.4. We have explored different activities (sitting, standing and walking) as well as many sensor locations (ear, chest, waist, knee and ankle). Finally we explored the co-existence of both of these radios. In this paper, we present the results of these experiments and provide a detailed analysis of the suitability of these radios for body area networks.</blockquote>

Links: [http://portal.acm.org/citation.cfm?id=1460291# Paper]

=== November 14, 2008 - Greg Hackmann ===

<pre>
NAWMS: Nonintrusive Autonomous Water Monitoring System.
Younghun Kim, Thomas Schmid, Zainul M. Charbiwala, Jonathan Friedman, Mani B. Srivastava.
SenSys '08.
</pre>

Links: [http://nesl.ee.ucla.edu/~neslfw/documents/conference/2008/fp1569121580-kim.pdf Paper] [http://nesl.ee.ucla.edu/~neslfw/documents/slides/2008/Sensys2008_NAWMS.pdf Slides]

=== November 21, 2008 - Yong Fu===
<pre>
Adaptive Control of Virtualized Resources in Utility Computing Environments
Padala, P., Shin, K., Zhu, X., Uysal, M., Wang, Z., Singhal, S., Merchant A., Salem, K.
EuroSys 2007
</pre>

Links: [[media:virtual-eurosys07.pdf|Paper]], [http://classes.cec.wustl.edu/~cse730/slides/eurosys07.ppt Slides]

=== November 28, 2008 - N/A ===

''Thanksgiving''

=== December 5, 2008 - Vincent Guo ===
<pre>
The Beta Factor: Measuring Wireless Link Burstiness. Kannan Srinivasan (Stanford University, US);
Maria Kazandjieva; Saatvik Agarwal; Philip Levis (Stanford, US). SenSys'08.
</pre>

links:[http://sing.stanford.edu/pubs/sensys08-beta.pdf paper]

=== December 12, 2008 - N/A ===

=== December 19, 2008 - Chengjie Wu ===

<pre>
Passive diagnosis for wireless sensor networks.
Kebin Liu, Mo Li, Yunhao Liu, Minglu Li, Zhongwen Guo, Feng Hong.
SenSys 2008.
</pre>

Links: [[http://delivery.acm.org/10.1145/1470000/1460424/p113-liu.pdf?key1=1460424&key2=9308509221&coll=GUIDE&dl=GUIDE&CFID=14316947&CFTOKEN=76055040 Paper]]

''Winter Break''

Seminar Fall 2008

2009-12-24T01:25:01Z

Liangfok: /* October 17, 2008 - Chien-Liang Fok */

Seminar Fall 2008

2009-12-24T01:23:39Z

Liangfok: /* November 7, 2008 - Sangeeta Bhattacharya */

Seminar Fall 2008

2009-12-24T01:18:20Z

Liangfok: /* October 31, 2008 - Octav Chipara */

Seminar Fall 2008

2009-12-24T01:14:24Z

Liangfok: /* October 3, 2008 - Vincent Guo */

Seminar Fall 2008

2009-12-24T01:13:58Z

Liangfok: /* October 3, 2008 - Vincent Guo */

Seminar Fall 2008

2009-12-24T01:02:29Z

Liangfok: /* September 26, 2008 - Yong Fu */

CSE730x Research Seminar

2009-12-04T19:59:45Z

Liangfok: /* December 4, 2009 - N/A */

{| align="right"
| __TOC__
|}

* '''Instructors:''' [http://www.cse.wustl.edu/~lu Chenyang Lu] and [http://www.cse.wustl.edu/~roman Gruia-Catalin Roman]
* '''Time: Friday at 2-3:30pm, Location: Bryan 509C'''

This seminar examines fundamental and emerging concepts in concurrency and distribution by studying seminal papers and recent research results. Broad topics of interest include models of concurrency, mobile computing, parallel architectures, sensor networks, distributed algorithms, and specialized protocols. Each semester, the seminar emphasizes different themes reflecting the current research interests of the participants.

The theme of this semester's seminar is Wireless Sensor Networks. We will read and discuss papers from recent major conferences on mobile, wireless, and sensor networks and systems. These conferences include:

* [http://sensys.acm.org/ SenSys]
* IPSN ([http://portal.acm.org/citation.cfm?id=984626&coll=portal&dl=ACM&CFID=26359144&CFTOKEN=96957034 ACM Archive])
* MobiCom ([http://portal.acm.org/toc.cfm?id=SERIES395&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* MobiSys ([http://www.sigmobile.org/mobisys/2006/ 2006], [http://portal.acm.org/toc.cfm?id=SERIES11190&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* NSDI ([http://www.usenix.org/events/nsdi07/ USENIX Website])
* [http://sosp.org/ SOSP]
* OSDI ([http://www.informatik.uni-trier.de/%7Eley/db/conf/osdi/ Archive website])
* RTSS ([http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000619 IEEE Archive])
* RTAS (IEEE Archive: [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000616 part1] [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000621 part2])
* SIGCOMM ([http://www.sigcomm.org/ Website])
When choosing a paper to present, you may look through the conferences mentioned above, or view the [[List of Potential Papers|list of potential papers]].

=== August 28, 2009 - Abu Sayeed Saifullah ===

''WirelessHART''

=== September 4, 2009 - Octav Chipara ===

''Reliable Clinical Monitoring.''

=== September 11, 2009 - Yong Fu ===
<blockquote>Feedback Thermal Control for Real-time Systems</blockquote>

=== September 18, 2009 - Chengjie Wu ===

<blockquote> Miroslav Pajic and Rahul Mangharam, Anti-Jamming for Embedded Wireless Networks, IPSN 09, Apr. 2009.</blockquote>

Paper: [http://mlab.seas.upenn.edu/node/109]

=== September 25, 2009 - Weijun (Vincent) Guo ===

<blockquote>Surviving Sensor Network Software Faults
Yang Chen (University of Utah), Omprakash Gnawali (USC), Maria Kazandjieva (Stanford University), Philip Levis (Stanford University), John Regehr (University of Utah)

<hr><hr>
Abstract
We describe Neutron, a version of the TinyOS operating system that efficiently recovers from memory safety bugs.
Where existing schemes reboot an entire node on an error, Neutron’s compiler and runtime extensions divide programs
into recovery units and reboot only the faulting unit. The TinyOS kernel itself is a recovery unit: a kernel safety violation
appears to applications as the processor being unavailable for 10–20 milliseconds. Neutron further minimizes safety violation cost by supporting “precious” state that persists across reboots. Application data, time synchronization state, and routing tables
can all be declared as precious. Neutron’s reboot sequence conservatively checks that precious state is not the source of
a fault before preserving it. Together, recovery units and precious state allow Neutron to reduce a safety violation’s cost
to time synchronization by 94% and to a routing protocol by 99:5%. Neutron also protects applications from losing data.
Neutron provides this recovery on the very limited resources of a tiny, low-power microcontroller.
</blockquote>

Paper: [http://www.sigops.org/sosp/sosp09/papers/chen-sosp09.pdf pdf][http://www.cse.wustl.edu/wsn/images/3/3b/Surviving_Sensor_Network_Software_Faults.pptx my slides]

=== October 2, 2009 - Sisu Xi ===

=== October 9, 2009 - N/A ===
''Canceled due to RTAS deadline.''

=== October 16, 2009 - N/A ===

''Fall Break''

=== October 23, 2009 - Louis Thomas ===
* The Hitchhiker's Guide to Successful Wireless Sensor Network Deployments" by Barrenetxea et al.
** Link: http://www.csce.uark.edu/~nilanb/teaching/papers/Barrenetxea.pdf

=== October 30, 2009 - N/A ===
''Canceled due to IPSN deadline''

=== November 6, 2009 - Mo Sha ===

=== November 13, 2009 - Yong Fu ===

=== November 20, 2009 - Greg Hackmann ===

<blockquote>RACNet: A High-Fidelity Data Center Sensing Network. Chieh-Jan Mike Liang, Jie Liu, Liqian Luo, Andreas Terzis, Feng Zhao. SenSys 2009.
</blockquote>

Links: [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet.pdf Paper], [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet_Slides.pdf Slides]

=== November 27, 2009 - N/A ===
''Thanksgiving Break''

=== December 4, 2009 - Chien-Liang Fok ===

<blockquote>Ramanathan, N., Schoellhammer, T., Kohler, E., Whitehouse, K., Harmon,
T., and Estrin, D. 2009. Suelo: human-assisted sensing for exploratory
soil monitoring studies. In Proceedings of the 7th ACM Conference on
Embedded Networked Sensor Systems (Berkeley, California, November 04 -
06, 2009). SenSys '09. ACM, New York, NY, 197-210. DOI=
http://doi.acm.org/10.1145/1644038.1644058</blockquote>

=== December 11, 2009 - Abu Sayeed Saifullah ===

=== December 18, 2009 - N/A ===

''Winter Break''

==Previous Semesters==
* [[Seminar Summer 2009|Summer 2009]]
* [[Seminar Spring 2009|Spring 2009]]
* [[Seminar Fall 2008|Fall 2008]]
* [[Seminar Summer 2008|Summer 2008]]
* [[Seminar Spring 2008|Spring 2008]]
* [[Fall 2007]]
* [[Summer 2007]]
* [[Spring 2007]]
* [[Fall 2006]]
* [[Spring 2006]]
* [[Fall 2005]]
* [[Spring 2005]]
* [[Fall 2004]]
* [[Spring 2004]]
* [[Fall 2003]]
* [[Spring 2003]]
* [[Fall 2002]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2002.html Spring 2002]
* [http://userfs.cec.wustl.edu/~cs673/fall.2001.html Fall 2001]
* [http://userfs.cec.wustl.edu/~cs673/spring.2001.html Spring 2001]
* [[Fall 2000]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2000.html Spring 2000]
* [http://cec.wustl.edu/~cs673/backUp/fall.1998.html Fall 1998]
* [http://cec.wustl.edu/~cs673/backUp/spring.1998.html Spring 1998]

CSE730x Research Seminar

2009-12-02T16:17:43Z

Liangfok: /* December 4, 2009 - Chien-Liang Fok */

{| align="right"
| __TOC__
|}

* '''Instructors:''' [http://www.cse.wustl.edu/~lu Chenyang Lu] and [http://www.cse.wustl.edu/~roman Gruia-Catalin Roman]
* '''Time: Friday at 2-3:30pm, Location: Bryan 509C'''

This seminar examines fundamental and emerging concepts in concurrency and distribution by studying seminal papers and recent research results. Broad topics of interest include models of concurrency, mobile computing, parallel architectures, sensor networks, distributed algorithms, and specialized protocols. Each semester, the seminar emphasizes different themes reflecting the current research interests of the participants.

The theme of this semester's seminar is Wireless Sensor Networks. We will read and discuss papers from recent major conferences on mobile, wireless, and sensor networks and systems. These conferences include:

* [http://sensys.acm.org/ SenSys]
* IPSN ([http://portal.acm.org/citation.cfm?id=984626&coll=portal&dl=ACM&CFID=26359144&CFTOKEN=96957034 ACM Archive])
* MobiCom ([http://portal.acm.org/toc.cfm?id=SERIES395&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* MobiSys ([http://www.sigmobile.org/mobisys/2006/ 2006], [http://portal.acm.org/toc.cfm?id=SERIES11190&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* NSDI ([http://www.usenix.org/events/nsdi07/ USENIX Website])
* [http://sosp.org/ SOSP]
* OSDI ([http://www.informatik.uni-trier.de/%7Eley/db/conf/osdi/ Archive website])
* RTSS ([http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000619 IEEE Archive])
* RTAS (IEEE Archive: [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000616 part1] [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000621 part2])
* SIGCOMM ([http://www.sigcomm.org/ Website])
When choosing a paper to present, you may look through the conferences mentioned above, or view the [[List of Potential Papers|list of potential papers]].

=== August 28, 2009 - Abu Sayeed Saifullah ===

''WirelessHART''

=== September 4, 2009 - Octav Chipara ===

''Reliable Clinical Monitoring.''

=== September 11, 2009 - Yong Fu ===
<blockquote>Feedback Thermal Control for Real-time Systems</blockquote>

=== September 18, 2009 - Chengjie Wu ===

<blockquote> Miroslav Pajic and Rahul Mangharam, Anti-Jamming for Embedded Wireless Networks, IPSN 09, Apr. 2009.</blockquote>

Paper: [http://mlab.seas.upenn.edu/node/109]

=== September 25, 2009 - Weijun (Vincent) Guo ===

<blockquote>Surviving Sensor Network Software Faults
Yang Chen (University of Utah), Omprakash Gnawali (USC), Maria Kazandjieva (Stanford University), Philip Levis (Stanford University), John Regehr (University of Utah)

<hr><hr>
Abstract
We describe Neutron, a version of the TinyOS operating system that efficiently recovers from memory safety bugs.
Where existing schemes reboot an entire node on an error, Neutron’s compiler and runtime extensions divide programs
into recovery units and reboot only the faulting unit. The TinyOS kernel itself is a recovery unit: a kernel safety violation
appears to applications as the processor being unavailable for 10–20 milliseconds. Neutron further minimizes safety violation cost by supporting “precious” state that persists across reboots. Application data, time synchronization state, and routing tables
can all be declared as precious. Neutron’s reboot sequence conservatively checks that precious state is not the source of
a fault before preserving it. Together, recovery units and precious state allow Neutron to reduce a safety violation’s cost
to time synchronization by 94% and to a routing protocol by 99:5%. Neutron also protects applications from losing data.
Neutron provides this recovery on the very limited resources of a tiny, low-power microcontroller.
</blockquote>

Paper: [http://www.sigops.org/sosp/sosp09/papers/chen-sosp09.pdf pdf][http://www.cse.wustl.edu/wsn/images/3/3b/Surviving_Sensor_Network_Software_Faults.pptx my slides]

=== October 2, 2009 - Sisu Xi ===

=== October 9, 2009 - N/A ===
''Canceled due to RTAS deadline.''

=== October 16, 2009 - N/A ===

''Fall Break''

=== October 23, 2009 - Louis Thomas ===
* The Hitchhiker's Guide to Successful Wireless Sensor Network Deployments" by Barrenetxea et al.
** Link: http://www.csce.uark.edu/~nilanb/teaching/papers/Barrenetxea.pdf

=== October 30, 2009 - N/A ===
''Canceled due to IPSN deadline''

=== November 6, 2009 - Mo Sha ===

=== November 13, 2009 - Yong Fu ===

=== November 20, 2009 - Greg Hackmann ===

<blockquote>RACNet: A High-Fidelity Data Center Sensing Network. Chieh-Jan Mike Liang, Jie Liu, Liqian Luo, Andreas Terzis, Feng Zhao. SenSys 2009.
</blockquote>

Links: [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet.pdf Paper], [http://www.cs.jhu.edu/~cliang4/public/doc/2009_SenSys_RACNet_Slides.pdf Slides]

=== November 27, 2009 - N/A ===
''Thanksgiving Break''

=== December 4, 2009 - N/A ===

''Canceled due to RTSS.''

=== December 11, 2009 - Abu Sayeed Saifullah ===

=== December 18, 2009 - N/A ===

''Winter Break''

==Previous Semesters==
* [[Seminar Summer 2009|Summer 2009]]
* [[Seminar Spring 2009|Spring 2009]]
* [[Seminar Fall 2008|Fall 2008]]
* [[Seminar Summer 2008|Summer 2008]]
* [[Seminar Spring 2008|Spring 2008]]
* [[Fall 2007]]
* [[Summer 2007]]
* [[Spring 2007]]
* [[Fall 2006]]
* [[Spring 2006]]
* [[Fall 2005]]
* [[Spring 2005]]
* [[Fall 2004]]
* [[Spring 2004]]
* [[Fall 2003]]
* [[Spring 2003]]
* [[Fall 2002]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2002.html Spring 2002]
* [http://userfs.cec.wustl.edu/~cs673/fall.2001.html Fall 2001]
* [http://userfs.cec.wustl.edu/~cs673/spring.2001.html Spring 2001]
* [[Fall 2000]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2000.html Spring 2000]
* [http://cec.wustl.edu/~cs673/backUp/fall.1998.html Fall 1998]
* [http://cec.wustl.edu/~cs673/backUp/spring.1998.html Spring 1998]

Toggling an External Pin on the Imote2

2009-10-26T04:56:30Z

Liangfok: /* TinyOS 2.x */

Sometimes toggling an external pin is useful when evaluating an Imote2. By toggling this pin at certain intervals, an oscilloscope can be used to measure the latency of an operation. The following instructions describe how to toggle pin 14 of interface J7 via the interface that controls the red LED.

See the [[media:Imote2-ds-rev2_2.pdf|Intel Imote2 Engineering Data Sheet]] for the locations of interface J2 and pin 14.

When measuring the voltage of pin 14, it is high when red is off and low when red is on.

== TinyOS 1.x ==

Open the following file:

<pre>$TOSROOT/tos/platforms/imote2/hardware.h</pre>

On line 141, change 103 to be 94.

== TinyOS 2.x ==

Open the following file:

<pre>$TOSROOT/tos/platforms/intelmote2/hardware.h</pre>

On line 192, change 103 to be 94.

Another option is to change 103 to 95, which toggles GPIO pin 93 (this is better in that it does not conflict with ITS400 sensor board). This maps to pin number 31 of connector J7.

CSE730x Research Seminar

2009-10-23T15:28:51Z

Liangfok: /* October 23, 2009 - Louis Thomas */

{| align="right"
| __TOC__
|}

* '''Instructors:''' [http://www.cse.wustl.edu/~lu Chenyang Lu] and [http://www.cse.wustl.edu/~roman Gruia-Catalin Roman]
* '''Time: Friday at 2-3:30pm, Location: Bryan 509C'''

This seminar examines fundamental and emerging concepts in concurrency and distribution by studying seminal papers and recent research results. Broad topics of interest include models of concurrency, mobile computing, parallel architectures, sensor networks, distributed algorithms, and specialized protocols. Each semester, the seminar emphasizes different themes reflecting the current research interests of the participants.

The theme of this semester's seminar is Wireless Sensor Networks. We will read and discuss papers from recent major conferences on mobile, wireless, and sensor networks and systems. These conferences include:

* [http://sensys.acm.org/ SenSys]
* IPSN ([http://portal.acm.org/citation.cfm?id=984626&coll=portal&dl=ACM&CFID=26359144&CFTOKEN=96957034 ACM Archive])
* MobiCom ([http://portal.acm.org/toc.cfm?id=SERIES395&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* MobiSys ([http://www.sigmobile.org/mobisys/2006/ 2006], [http://portal.acm.org/toc.cfm?id=SERIES11190&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* NSDI ([http://www.usenix.org/events/nsdi07/ USENIX Website])
* [http://sosp.org/ SOSP]
* OSDI ([http://www.informatik.uni-trier.de/%7Eley/db/conf/osdi/ Archive website])
* RTSS ([http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000619 IEEE Archive])
* RTAS (IEEE Archive: [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000616 part1] [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000621 part2])
* SIGCOMM ([http://www.sigcomm.org/ Website])
When choosing a paper to present, you may look through the conferences mentioned above, or view the [[List of Potential Papers|list of potential papers]].

=== August 28, 2009 - Abu Sayeed Saifullah ===

''WirelessHART''

=== September 4, 2009 - Octav Chipara ===

''Reliable Clinical Monitoring.''

=== September 11, 2009 - Yong Fu ===
<blockquote>Feedback Thermal Control for Real-time Systems</blockquote>

=== September 18, 2009 - Chengjie Wu ===

<blockquote> Miroslav Pajic and Rahul Mangharam, Anti-Jamming for Embedded Wireless Networks, IPSN 09, Apr. 2009.</blockquote>

Paper: [http://mlab.seas.upenn.edu/node/109]

=== September 25, 2009 - Weijun (Vincent) Guo ===

<blockquote>Surviving Sensor Network Software Faults
Yang Chen (University of Utah), Omprakash Gnawali (USC), Maria Kazandjieva (Stanford University), Philip Levis (Stanford University), John Regehr (University of Utah)

<hr><hr>
Abstract
We describe Neutron, a version of the TinyOS operating system that efficiently recovers from memory safety bugs.
Where existing schemes reboot an entire node on an error, Neutron’s compiler and runtime extensions divide programs
into recovery units and reboot only the faulting unit. The TinyOS kernel itself is a recovery unit: a kernel safety violation
appears to applications as the processor being unavailable for 10–20 milliseconds. Neutron further minimizes safety violation cost by supporting “precious” state that persists across reboots. Application data, time synchronization state, and routing tables
can all be declared as precious. Neutron’s reboot sequence conservatively checks that precious state is not the source of
a fault before preserving it. Together, recovery units and precious state allow Neutron to reduce a safety violation’s cost
to time synchronization by 94% and to a routing protocol by 99:5%. Neutron also protects applications from losing data.
Neutron provides this recovery on the very limited resources of a tiny, low-power microcontroller.
</blockquote>

Paper: [http://www.sigops.org/sosp/sosp09/papers/chen-sosp09.pdf pdf][http://www.cse.wustl.edu/wsn/images/3/3b/Surviving_Sensor_Network_Software_Faults.pptx my slides]

=== October 2, 2009 - Sisu Xi ===

=== October 9, 2009 - N/A ===
''Canceled due to RTAS deadline.''

=== October 16, 2009 - N/A ===

''Fall Break''

=== October 23, 2009 - Louis Thomas ===
* The Hitchhiker's Guide to Successful Wireless Sensor Network Deployments" by Barrenetxea et al.
** Link: http://www.csce.uark.edu/~nilanb/teaching/papers/Barrenetxea.pdf

=== October 30, 2009 - N/A ===
''Canceled due to IPSN deadline''

=== November 6, 2009 - Mo Sha ===

=== November 13, 2009 - Yong Fu ===

=== November 20, 2009 - Greg Hackmann ===

=== November 27, 2009 - N/A ===
''Thanksgiving Break''

=== December 4, 2009 - Chien-Liang Fok ===

=== December 11, 2009 - Abu Sayeed Saifullah ===

=== December 18, 2009 - N/A ===

''Winter Break''

==Previous Semesters==
* [[Seminar Summer 2009|Summer 2009]]
* [[Seminar Spring 2009|Spring 2009]]
* [[Seminar Fall 2008|Fall 2008]]
* [[Seminar Summer 2008|Summer 2008]]
* [[Seminar Spring 2008|Spring 2008]]
* [[Fall 2007]]
* [[Summer 2007]]
* [[Spring 2007]]
* [[Fall 2006]]
* [[Spring 2006]]
* [[Fall 2005]]
* [[Spring 2005]]
* [[Fall 2004]]
* [[Spring 2004]]
* [[Fall 2003]]
* [[Spring 2003]]
* [[Fall 2002]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2002.html Spring 2002]
* [http://userfs.cec.wustl.edu/~cs673/fall.2001.html Fall 2001]
* [http://userfs.cec.wustl.edu/~cs673/spring.2001.html Spring 2001]
* [[Fall 2000]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2000.html Spring 2000]
* [http://cec.wustl.edu/~cs673/backUp/fall.1998.html Fall 1998]
* [http://cec.wustl.edu/~cs673/backUp/spring.1998.html Spring 1998]

CSE730x Research Seminar

2009-09-30T16:41:54Z

Liangfok: /* October 2, 2009 - Chien-Liang Fok */

{| align="right"
| __TOC__
|}

* '''Instructors:''' [http://www.cse.wustl.edu/~lu Chenyang Lu] and [http://www.cse.wustl.edu/~roman Gruia-Catalin Roman]
* '''Time: Friday at 2-3:30pm, Location: Bryan 509C'''

This seminar examines fundamental and emerging concepts in concurrency and distribution by studying seminal papers and recent research results. Broad topics of interest include models of concurrency, mobile computing, parallel architectures, sensor networks, distributed algorithms, and specialized protocols. Each semester, the seminar emphasizes different themes reflecting the current research interests of the participants.

The theme of this semester's seminar is Wireless Sensor Networks. We will read and discuss papers from recent major conferences on mobile, wireless, and sensor networks and systems. These conferences include:

* [http://sensys.acm.org/ SenSys]
* IPSN ([http://portal.acm.org/citation.cfm?id=984626&coll=portal&dl=ACM&CFID=26359144&CFTOKEN=96957034 ACM Archive])
* MobiCom ([http://portal.acm.org/toc.cfm?id=SERIES395&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* MobiSys ([http://www.sigmobile.org/mobisys/2006/ 2006], [http://portal.acm.org/toc.cfm?id=SERIES11190&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* NSDI ([http://www.usenix.org/events/nsdi07/ USENIX Website])
* [http://sosp.org/ SOSP]
* OSDI ([http://www.informatik.uni-trier.de/%7Eley/db/conf/osdi/ Archive website])
* RTSS ([http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000619 IEEE Archive])
* RTAS (IEEE Archive: [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000616 part1] [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000621 part2])
* SIGCOMM ([http://www.sigcomm.org/ Website])
When choosing a paper to present, you may look through the conferences mentioned above, or view the [[List of Potential Papers|list of potential papers]].

=== August 28, 2009 - Abu Sayeed Saifullah ===

''WirelessHART''

=== September 4, 2009 - Octav Chipara ===

''Reliable Clinical Monitoring.''

=== September 11, 2009 - Yong Fu ===
<blockquote>Feedback Thermal Control for Real-time Systems</blockquote>

=== September 18, 2009 - Chengjie Wu ===

<blockquote> Miroslav Pajic and Rahul Mangharam, Anti-Jamming for Embedded Wireless Networks, IPSN 09, Apr. 2009.</blockquote>

Paper: [http://mlab.seas.upenn.edu/node/109]

=== September 25, 2009 - Weijun (Vincent) Guo ===

<blockquote>Surviving Sensor Network Software Faults
Yang Chen (University of Utah), Omprakash Gnawali (USC), Maria Kazandjieva (Stanford University), Philip Levis (Stanford University), John Regehr (University of Utah)

<hr><hr>
Abstract
We describe Neutron, a version of the TinyOS operating system that efficiently recovers from memory safety bugs.
Where existing schemes reboot an entire node on an error, Neutron’s compiler and runtime extensions divide programs
into recovery units and reboot only the faulting unit. The TinyOS kernel itself is a recovery unit: a kernel safety violation
appears to applications as the processor being unavailable for 10–20 milliseconds. Neutron further minimizes safety violation cost by supporting “precious” state that persists across reboots. Application data, time synchronization state, and routing tables
can all be declared as precious. Neutron’s reboot sequence conservatively checks that precious state is not the source of
a fault before preserving it. Together, recovery units and precious state allow Neutron to reduce a safety violation’s cost
to time synchronization by 94% and to a routing protocol by 99:5%. Neutron also protects applications from losing data.
Neutron provides this recovery on the very limited resources of a tiny, low-power microcontroller.
</blockquote>

Paper: [http://www.sigops.org/sosp/sosp09/papers/chen-sosp09.pdf pdf][http://www.cse.wustl.edu/wsn/images/3/3b/Surviving_Sensor_Network_Software_Faults.pptx my slides]

=== October 2, 2009 - Sisu Xi ===

=== October 9, 2009 - N/A ===
''Canceled due to RTAS deadline.''

=== October 16, 2009 - N/A ===

''Fall Break''

=== October 23, 2009 - Louis Thomas ===

=== October 30, 2009 - N/A ===
''Canceled due to IPSN deadline''

=== November 6, 2009 - Mo Sha ===

=== November 13, 2009 - Yong Fu ===

=== November 20, 2009 - Greg Hackmann ===

=== November 27, 2009 - N/A ===
''Thanksgiving Break''

=== December 4, 2009 - Chien-Liang Fok ===

=== December 11, 2009 - Abu Sayeed Saifullah ===

=== December 18, 2009 - N/A ===

''Winter Break''

==Previous Semesters==
* [[Seminar Summer 2009|Summer 2009]]
* [[Seminar Spring 2009|Spring 2009]]
* [[Seminar Fall 2008|Fall 2008]]
* [[Seminar Summer 2008|Summer 2008]]
* [[Seminar Spring 2008|Spring 2008]]
* [[Fall 2007]]
* [[Summer 2007]]
* [[Spring 2007]]
* [[Fall 2006]]
* [[Spring 2006]]
* [[Fall 2005]]
* [[Spring 2005]]
* [[Fall 2004]]
* [[Spring 2004]]
* [[Fall 2003]]
* [[Spring 2003]]
* [[Fall 2002]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2002.html Spring 2002]
* [http://userfs.cec.wustl.edu/~cs673/fall.2001.html Fall 2001]
* [http://userfs.cec.wustl.edu/~cs673/spring.2001.html Spring 2001]
* [[Fall 2000]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2000.html Spring 2000]
* [http://cec.wustl.edu/~cs673/backUp/fall.1998.html Fall 1998]
* [http://cec.wustl.edu/~cs673/backUp/spring.1998.html Spring 1998]

CSE730x Research Seminar

2009-09-30T16:41:42Z

Liangfok: /* December 4, 2009 - Sisu Xi */

{| align="right"
| __TOC__
|}

* '''Instructors:''' [http://www.cse.wustl.edu/~lu Chenyang Lu] and [http://www.cse.wustl.edu/~roman Gruia-Catalin Roman]
* '''Time: Friday at 2-3:30pm, Location: Bryan 509C'''

This seminar examines fundamental and emerging concepts in concurrency and distribution by studying seminal papers and recent research results. Broad topics of interest include models of concurrency, mobile computing, parallel architectures, sensor networks, distributed algorithms, and specialized protocols. Each semester, the seminar emphasizes different themes reflecting the current research interests of the participants.

The theme of this semester's seminar is Wireless Sensor Networks. We will read and discuss papers from recent major conferences on mobile, wireless, and sensor networks and systems. These conferences include:

* [http://sensys.acm.org/ SenSys]
* IPSN ([http://portal.acm.org/citation.cfm?id=984626&coll=portal&dl=ACM&CFID=26359144&CFTOKEN=96957034 ACM Archive])
* MobiCom ([http://portal.acm.org/toc.cfm?id=SERIES395&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* MobiSys ([http://www.sigmobile.org/mobisys/2006/ 2006], [http://portal.acm.org/toc.cfm?id=SERIES11190&type=series&coll=ACM&dl=ACM&CFID=26358907&CFTOKEN=49744667 ACM archive])
* NSDI ([http://www.usenix.org/events/nsdi07/ USENIX Website])
* [http://sosp.org/ SOSP]
* OSDI ([http://www.informatik.uni-trier.de/%7Eley/db/conf/osdi/ Archive website])
* RTSS ([http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000619 IEEE Archive])
* RTAS (IEEE Archive: [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000616 part1] [http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000621 part2])
* SIGCOMM ([http://www.sigcomm.org/ Website])
When choosing a paper to present, you may look through the conferences mentioned above, or view the [[List of Potential Papers|list of potential papers]].

=== August 28, 2009 - Abu Sayeed Saifullah ===

''WirelessHART''

=== September 4, 2009 - Octav Chipara ===

''Reliable Clinical Monitoring.''

=== September 11, 2009 - Yong Fu ===
<blockquote>Feedback Thermal Control for Real-time Systems</blockquote>

=== September 18, 2009 - Chengjie Wu ===

<blockquote> Miroslav Pajic and Rahul Mangharam, Anti-Jamming for Embedded Wireless Networks, IPSN 09, Apr. 2009.</blockquote>

Paper: [http://mlab.seas.upenn.edu/node/109]

=== September 25, 2009 - Weijun (Vincent) Guo ===

<blockquote>Surviving Sensor Network Software Faults
Yang Chen (University of Utah), Omprakash Gnawali (USC), Maria Kazandjieva (Stanford University), Philip Levis (Stanford University), John Regehr (University of Utah)

<hr><hr>
Abstract
We describe Neutron, a version of the TinyOS operating system that efficiently recovers from memory safety bugs.
Where existing schemes reboot an entire node on an error, Neutron’s compiler and runtime extensions divide programs
into recovery units and reboot only the faulting unit. The TinyOS kernel itself is a recovery unit: a kernel safety violation
appears to applications as the processor being unavailable for 10–20 milliseconds. Neutron further minimizes safety violation cost by supporting “precious” state that persists across reboots. Application data, time synchronization state, and routing tables
can all be declared as precious. Neutron’s reboot sequence conservatively checks that precious state is not the source of
a fault before preserving it. Together, recovery units and precious state allow Neutron to reduce a safety violation’s cost
to time synchronization by 94% and to a routing protocol by 99:5%. Neutron also protects applications from losing data.
Neutron provides this recovery on the very limited resources of a tiny, low-power microcontroller.
</blockquote>

Paper: [http://www.sigops.org/sosp/sosp09/papers/chen-sosp09.pdf pdf][http://www.cse.wustl.edu/wsn/images/3/3b/Surviving_Sensor_Network_Software_Faults.pptx my slides]

=== October 2, 2009 - Chien-Liang Fok ===

=== October 9, 2009 - N/A ===
''Canceled due to RTAS deadline.''

=== October 16, 2009 - N/A ===

''Fall Break''

=== October 23, 2009 - Louis Thomas ===

=== October 30, 2009 - N/A ===
''Canceled due to IPSN deadline''

=== November 6, 2009 - Mo Sha ===

=== November 13, 2009 - Yong Fu ===

=== November 20, 2009 - Greg Hackmann ===

=== November 27, 2009 - N/A ===
''Thanksgiving Break''

=== December 4, 2009 - Chien-Liang Fok ===

=== December 11, 2009 - Abu Sayeed Saifullah ===

=== December 18, 2009 - N/A ===

''Winter Break''

==Previous Semesters==
* [[Seminar Summer 2009|Summer 2009]]
* [[Seminar Spring 2009|Spring 2009]]
* [[Seminar Fall 2008|Fall 2008]]
* [[Seminar Summer 2008|Summer 2008]]
* [[Seminar Spring 2008|Spring 2008]]
* [[Fall 2007]]
* [[Summer 2007]]
* [[Spring 2007]]
* [[Fall 2006]]
* [[Spring 2006]]
* [[Fall 2005]]
* [[Spring 2005]]
* [[Fall 2004]]
* [[Spring 2004]]
* [[Fall 2003]]
* [[Spring 2003]]
* [[Fall 2002]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2002.html Spring 2002]
* [http://userfs.cec.wustl.edu/~cs673/fall.2001.html Fall 2001]
* [http://userfs.cec.wustl.edu/~cs673/spring.2001.html Spring 2001]
* [[Fall 2000]]
* [http://userfs.cec.wustl.edu/~cs673/spring.2000.html Spring 2000]
* [http://cec.wustl.edu/~cs673/backUp/fall.1998.html Fall 1998]
* [http://cec.wustl.edu/~cs673/backUp/spring.1998.html Spring 1998]

Toggling a TelosB ADC Pin

2009-09-22T16:05:16Z

Liangfok: /* TinyOS 2.x */

== TinyOS 1.x ==
First do this in StdControl.init():

<pre>
TOSH_MAKE_ADC3_OUTPUT();
</pre>

To set the pin high:
<pre>
TOSH_SET_ADC3_PIN();
</pre>

To set the pin low:
<pre>
TOSH_CLR_ADC3_PIN();
</pre>

You can of course switch the ADC number, and maybe even replace it with GIO#.

== TinyOS 2.x ==

In TinyOS 2.x, pins are toggled via interface tos/chips/msp430/pins/HplMsp430GeneralIO.nc.

There is a configuration file called "HplMsp430GeneralIOC" in the same directory that provides multiple instances of the above interface, one for each port. The port corresponds to the port number of the MCU, some of which map to exposed pins on the TelosB. See the schemetics of the TelosB to determine which ports map to which exposed pins on the PCB. Toggling the port consists of calling the following commands:

<blockquote>
HplMsp430GeneralIO.makeOutput() 
HplMsp430GeneralIO.clr() 
HplMsp430GeneralIO.set() 
HplMsp430GeneralIO.toggle()
</blockquote>

Here is an example application that demonstrates how to toggle pins on the TelosB in TinyOS 2.x: [http://www.cse.wustl.edu/~liang/software/t2/TelosBPinToggleT2.zip Link]

Toggling a TelosB ADC Pin

2009-09-22T16:04:08Z

Liangfok: /* TinyOS 2.x */

== TinyOS 1.x ==
First do this in StdControl.init():

<pre>
TOSH_MAKE_ADC3_OUTPUT();
</pre>

To set the pin high:
<pre>
TOSH_SET_ADC3_PIN();
</pre>

To set the pin low:
<pre>
TOSH_CLR_ADC3_PIN();
</pre>

You can of course switch the ADC number, and maybe even replace it with GIO#.

== TinyOS 2.x ==

In TinyOS 2.x, pins are toggled via interface tos/chips/msp430/pins/HplMsp430GeneralIO.nc.

There is a configuration file called "HplMsp430GeneralIOC" in the same directory that provides multiple instances of the above interface, one for each port, some of which map to exposed pins on the TelosB. The port corresponds to the port number of the MCU. Toggling the port consists of calling the following commands:

<blockquote>
HplMsp430GeneralIO.makeOutput() 
HplMsp430GeneralIO.clr() 
HplMsp430GeneralIO.set() 
HplMsp430GeneralIO.toggle()
</blockquote>

Here is an example application that demonstrates how to toggle pins on the TelosB in TinyOS 2.x: [http://www.cse.wustl.edu/~liang/software/t2/TelosBPinToggleT2.zip Link]

Toggling a TelosB ADC Pin

2009-09-22T16:03:34Z

Liangfok: /* TinyOS 2.x */

== TinyOS 1.x ==
First do this in StdControl.init():

<pre>
TOSH_MAKE_ADC3_OUTPUT();
</pre>

To set the pin high:
<pre>
TOSH_SET_ADC3_PIN();
</pre>

To set the pin low:
<pre>
TOSH_CLR_ADC3_PIN();
</pre>

You can of course switch the ADC number, and maybe even replace it with GIO#.

== TinyOS 2.x ==

In TinyOS 2.x, pins are toggled via interface tos/chips/msp430/pins/HplMsp430GeneralIO.nc.

There is a configuration file called "HplMsp430GeneralIOC" in the same directory that provides multiple instances of the above interface, one for each port. The port corresponds to the port number of the MCU. Toggling the port consists of calling the following commands:

<blockquote>
HplMsp430GeneralIO.makeOutput() 
HplMsp430GeneralIO.clr() 
HplMsp430GeneralIO.set() 
HplMsp430GeneralIO.toggle()
</blockquote>

Here is an example application that demonstrates how to toggle pins on the TelosB in TinyOS 2.x: [http://www.cse.wustl.edu/~liang/software/t2/TelosBPinToggleT2.zip Link]

Toggling a TelosB ADC Pin

2009-09-22T16:02:43Z

Liangfok: /* TinyOS 2.x */

== TinyOS 1.x ==
First do this in StdControl.init():

<pre>
TOSH_MAKE_ADC3_OUTPUT();
</pre>

To set the pin high:
<pre>
TOSH_SET_ADC3_PIN();
</pre>

To set the pin low:
<pre>
TOSH_CLR_ADC3_PIN();
</pre>

You can of course switch the ADC number, and maybe even replace it with GIO#.

== TinyOS 2.x ==

In TinyOS 2.x, pins are toggled via interface tos/chips/msp430/pins/HplMsp430GeneralIO.nc.

There is a configuration file with a similar name in the same directory as above that provides multiple instances of the above interface, one for each port. The port corresponds to the port number of the MCU. Toggling the port consists of calling the following commands:

<blockquote>
HplMsp430GeneralIO.makeOutput() 
HplMsp430GeneralIO.clr() 
HplMsp430GeneralIO.set() 
HplMsp430GeneralIO.toggle()
</blockquote>

Here is an example application that demonstrates how to toggle pins on the TelosB in TinyOS 2.x: [http://www.cse.wustl.edu/~liang/software/t2/TelosBPinToggleT2.zip Link]

Toggling a TelosB ADC Pin

2009-09-22T16:02:17Z

Liangfok: /* TinyOS 2.x */

== TinyOS 1.x ==
First do this in StdControl.init():

<pre>
TOSH_MAKE_ADC3_OUTPUT();
</pre>

To set the pin high:
<pre>
TOSH_SET_ADC3_PIN();
</pre>

To set the pin low:
<pre>
TOSH_CLR_ADC3_PIN();
</pre>

You can of course switch the ADC number, and maybe even replace it with GIO#.

== TinyOS 2.x ==

In TinyOS 2.x, pin toggling is controlled via interface tos/chips/msp430/pins/HplMsp430GeneralIO.nc.

There is a configuration file with a similar name in the same directory as above that provides multiple instances of the above interface, one for each port. The port corresponds to the port number of the MCU. Toggling the port consists of calling the following commands:

<blockquote>
HplMsp430GeneralIO.makeOutput() 
HplMsp430GeneralIO.clr() 
HplMsp430GeneralIO.set() 
HplMsp430GeneralIO.toggle()
</blockquote>

Here is an example application that demonstrates how to toggle pins on the TelosB in TinyOS 2.x: [http://www.cse.wustl.edu/~liang/software/t2/TelosBPinToggleT2.zip Link]

Toggling a TelosB ADC Pin

2009-09-22T16:02:05Z

Liangfok: /* TinyOS 2.x */

== TinyOS 1.x ==
First do this in StdControl.init():

<pre>
TOSH_MAKE_ADC3_OUTPUT();
</pre>

To set the pin high:
<pre>
TOSH_SET_ADC3_PIN();
</pre>

To set the pin low:
<pre>
TOSH_CLR_ADC3_PIN();
</pre>

You can of course switch the ADC number, and maybe even replace it with GIO#.

== TinyOS 2.x ==

In TinyOS 2.x, pin toggling is controlled via interface tos/chips/msp430/pins/HplMsp430GeneralIO.nc.

There is a configuration file with a similar name in the same directory as above that provides multiple instances of the above interface, one for each port. The port corresponds to the port number of the MCU. Toggling the port consists of calling the following commands:

<blockquote>
HplMsp430GeneralIO.makeOutput() 
HplMsp430GeneralIO.clr()
HplMsp430GeneralIO.set()
HplMsp430GeneralIO.toggle()
</blockquote>

Here is an example application that demonstrates how to toggle pins on the TelosB in TinyOS 2.x: [http://www.cse.wustl.edu/~liang/software/t2/TelosBPinToggleT2.zip Link]

Toggling a TelosB ADC Pin

2009-09-22T15:59:56Z

Liangfok: /* TinyOS 2.x */

== TinyOS 1.x ==
First do this in StdControl.init():

<pre>
TOSH_MAKE_ADC3_OUTPUT();
</pre>

To set the pin high:
<pre>
TOSH_SET_ADC3_PIN();
</pre>

To set the pin low:
<pre>
TOSH_CLR_ADC3_PIN();
</pre>

You can of course switch the ADC number, and maybe even replace it with GIO#.

== TinyOS 2.x ==

In TinyOS 2.x, pin toggling is controlled via interface tos/chips/msp430/pins/HplMsp430GeneralIO.nc.

There is a configuration file with a similar name in the same directory as above that provides multiple instances of the above interface, one for each port. The port corresponds to the port number of the MCU. Toggling the port consists of calling the following commands:

<pre>
HplMsp430GeneralIO.makeOutput()
HplMsp430GeneralIO.clr()
HplMsp430GeneralIO.set()
HplMsp430GeneralIO.toggle()
</pre>

Toggling a TelosB ADC Pin

2009-09-22T15:59:17Z

Liangfok: /* TinyOS 2.x */

== TinyOS 1.x ==
First do this in StdControl.init():

<pre>
TOSH_MAKE_ADC3_OUTPUT();
</pre>

To set the pin high:
<pre>
TOSH_SET_ADC3_PIN();
</pre>

To set the pin low:
<pre>
TOSH_CLR_ADC3_PIN();
</pre>

You can of course switch the ADC number, and maybe even replace it with GIO#.

== TinyOS 2.x ==

In TinyOS 2.x, pin toggling is controlled via the following interface:

<blockquote>
tos/chips/msp430/pins/HplMsp430GeneralIO.nc
</blockquote>

There is a configuration file with a similar name in the same directory as above that provides multiple instances of the above interface, one for each port. The port corresponds to the port number of the MCU. Toggling the port consists of calling the following commands:

<pre>
HplMsp430GeneralIO.makeOutput()
HplMsp430GeneralIO.clr()
HplMsp430GeneralIO.set()
HplMsp430GeneralIO.toggle()
</pre>

Toggling an External Pin on the Imote2

2009-09-22T01:44:02Z

Liangfok:

Toggling a TelosB ADC Pin

2009-09-22T01:12:25Z

Liangfok: /* TinyOS 1.x */

Toggling a TelosB ADC Pin

2009-09-22T01:11:43Z

Liangfok:

File:ITS400 Datasheet.pdf

2009-09-22T00:43:06Z

Liangfok:

File:Imote2 hardware ref.pdf

2009-09-22T00:42:23Z

Liangfok:

Imote2 Documents

2009-09-22T00:42:16Z

Liangfok:

[[Image:IMote2.png|left|thumb|200px|An Intel Imote2]]
[[Image:IMote2 Arch.png|left|thumb|200px|The Intel Imote2 System Architecture]]

== Imote2 ==
* [http://tech.groups.yahoo.com/group/intel-mote2-community/ Yahoo Group]
* [[media:Imote2_Datasheet.pdf|Crossbow Technologies Imote2 Data Sheet]]
* [[media:Imote2_hardware_ref.pdf|Crossbow Technologies Imote2 Hardware Reference Manual]]
* [[media:Imote2-ds-rev2_2.pdf|Intel Imote2 Engineering Data Sheet]] - This document has useful pin-connector diagrams.

== ITS400 Sensor Board ==
[[Image:ITS400.png|left|thumb|200px|The Imote2 ITS400 Sensor Board]]
* [[media:ITS400_Datasheet.pdf|Crossbow Technologies ITS400 Sensor Board Datasheet]]
* [[media:Intel.ITS400.DataSheet.pdf|Intel ITS400 Sensor Board Engineering Datasheet]]
* [[media:LIS3L02DQ.pdf|LIS3L02DQ 3-Axis Accelerometer]]. This is the accelerometer that is on the ITS400 sensor board.

Imote2 Documents

2009-09-22T00:41:04Z

Liangfok:

[[Image:IMote2.png|left|thumb|200px|An Intel Imote2]]
[[Image:IMote2 Arch.png|left|thumb|200px|The Intel Imote2 System Architecture]]

== Imote2 ==
* [http://tech.groups.yahoo.com/group/intel-mote2-community/ Yahoo Group]
* [[media:Imote2_Datasheet.pdf|Crossbow Technologies Imote2 Data Sheet]]
* [[media:Imote2-ds-rev2_2.pdf|Intel Imote2 Engineering Data Sheet]] - This document has useful pin-connector diagrams.

== ITS400 Sensor Board ==
[[Image:ITS400.png|left|thumb|200px|The Imote2 ITS400 Sensor Board]]
* [[media:ITS400_Datasheet.pdf|Crossbow Technologies ITS400 Sensor Board Datasheet]]
* [[media:Intel.ITS400.DataSheet.pdf|Intel ITS400 Sensor Board Engineering Datasheet]]
* [[media:LIS3L02DQ.pdf|LIS3L02DQ 3-Axis Accelerometer]]. This is the accelerometer that is on the ITS400 sensor board.

Imote2 Documents

2009-09-22T00:39:48Z

Liangfok:

[[Image:IMote2.png|left|thumb|200px|An Intel Imote2]]
[[Image:IMote2 Arch.png|left|thumb|200px|The Intel Imote2 System Architecture]]

== Imote2 ==
* [http://tech.groups.yahoo.com/group/intel-mote2-community/ Yahoo Group]
* [[media:Imote2_Datasheet.pdf|Crossbow Technologies Imote2 Data Sheet]]
* [[media:Imote2-ds-rev2_2.pdf|Intel Imote2 Engineering Data Sheet]] - This document has useful pin-connector diagrams.

== ITS400 Sensor Board ==
[[Image:ITS400.png|left|thumb|200px|The Imote2 ITS400 Sensor Board]]
* [http://www.cs.wustl.edu/shm/images/8/8f/ITS400_Datasheet.pdf Crossbow Technologies ITS400 Sensor Board Datasheet]
* [http://www.cs.wustl.edu/shm/images/0/07/Intel.ITS400.DataSheet.pdf Intel ITS400 Sensor Board Engineering Datasheet]
* [[media:LIS3L02DQ.pdf|LIS3L02DQ 3-Axis Accelerometer]]. This is the accelerometer that is on the ITS400 sensor board.

File:Imote2-ds-rev2 2.pdf

2009-09-22T00:39:05Z

Liangfok:

File:Imote2 Datasheet.pdf

2009-09-22T00:39:01Z

Liangfok:

Imote2 Documents

2009-09-22T00:38:52Z

Liangfok:

[[Image:IMote2.png|left|thumb|200px|An Intel Imote2]]
[[Image:IMote2 Arch.png|left|thumb|200px|The Intel Imote2 System Architecture]]

== Imote2 ==
* [http://tech.groups.yahoo.com/group/intel-mote2-community/ Yahoo Group]
* [[media:Imote2_Datasheet.pdf|Crossbow Technologies Imote2 Data Sheet]]
* [[media:Imote2-ds-rev2_2.pdf|Intel Imote2 Engineering Data Sheet]]
* [http://www.cs.wustl.edu/shm/images/4/43/Imote_overview.pdf Intel Imote2 Overview] - This document has useful pin-connector diagrams.

== ITS400 Sensor Board ==
[[Image:ITS400.png|left|thumb|200px|The Imote2 ITS400 Sensor Board]]
* [http://www.cs.wustl.edu/shm/images/8/8f/ITS400_Datasheet.pdf Crossbow Technologies ITS400 Sensor Board Datasheet]
* [http://www.cs.wustl.edu/shm/images/0/07/Intel.ITS400.DataSheet.pdf Intel ITS400 Sensor Board Engineering Datasheet]
* [[media:LIS3L02DQ.pdf|LIS3L02DQ 3-Axis Accelerometer]]. This is the accelerometer that is on the ITS400 sensor board.

CSE730x Research Seminar

2009-09-17T15:17:06Z

Liangfok: /* September 11, 2009 - */

CSE730x Research Seminar

2009-09-17T15:16:43Z

Liangfok: /* September 4, 2009 - Octav Chipara */

CSE730x Research Seminar

2009-09-12T16:49:43Z

Liangfok: /* October 2, 2009 - Mo Sha */

CSE730x Research Seminar

2009-09-12T16:49:29Z

Liangfok: /* November 6, 2009 - Chien-Liang Fok */

Chien-Liang Fok

2009-09-07T08:30:20Z

Liangfok: /* Journal Papers */

__NOTOC__
[[image:liang-mug.jpg|right|75px]]

I am a graduate research assistant in the [http://www.cse.wustl.edu Department of Computer Science] at [http://www.wustl.edu Washington University in Saint Louis]. I am part of the [[WU_WSN_Research_Lab|wireless sensor network research group]] and [http://mobilab.wustl.edu Mobile Computing Laboratory]. My advisors are [http://www.cse.wustl.edu/~roman Gruia-Catalin Roman] and [http://www.cse.wustl.edu/~lu Chenyang Lu].

My primary research focus is on developing highly flexible middleware for wireless sensor networks. See [[#Projects|Projects]] for more details.

'''Contact:''' Office: Jolley 519, Phone: 314-935-7526, Fax: 314-935-7302, E-Mail liangfok [at] wustl [dot] edu

== Publications ==
=== Journal Papers ===
* '''C.-L. Fok''', G.-C. Roman, and C. Lu, [http://www.cs.wustl.edu/%7Elu/papers/taas-agilla.pdf Agilla: A Mobile Agent Middleware for Self-Adaptive Wireless Sensor Networks], ACM Transactions on Autonomous and Adaptive Systems, Special Issue on Self-Adaptive and Self-Organising Wireless Networking Systems. Volume 4, Issue 3, Article 16, July 2009, pp. 1-26. DOI= http://doi.acm.org/10.1145/1552297.1552299 ''Note: Extended version of the ICDCS'05 paper.''
* S. Bhattacharya, '''C.-L. Fok''', C. Lu and G.-C. Roman, "[[media:mlds.pdf|MLDS: A Flexible Location Directory Service for Tiered Sensor Networks]]," Computer Communications, Special Issue on Advanced Location-based Services, Computer Communications 31 (2008) 1160-1172. (Extended version of the DCOSS'07 paper)

=== Conference Papers ===

* '''Fok, C.-L.''', Roman, G.-C., Lu, C., [http://www.springerlink.com/content/882040862145t22u/ Enhanced Coordination in Sensor Networks through Flexible Service Provisioning], Proceedings of the 11th International Conference on Coordination Models and Languages (Coordination 2009), Field, J., Vasconcelos, V., (editors), Lecture Notes in Computer Science 5521, Springer-Verlag, Lisbon, Portugal, June 2009, pp. 66-85.

* Sangeeta Bhattacharya, '''Chien-Liang Fok''', Chenyang Lu, and Gruia-Catalin Roman, “[[media:mlds.pdf|Design and Implementation of a Flexible Location Directory Service for Tiered Sensor Networks]],” International Conference on Distributed Computing in Sensor Systems (DCOSS'07), June 2007.

* Gregory Hackmann, '''Chien-Liang Fok''', Gruia-Catalin Roman, and Chenyang Lu. "[http://www.google.com/url?sa=t&ct=res&cd=1&url=http%3A%2F%2Fwww.cse.wustl.edu%2F~lu%2Fpapers%2Fdcoss06_agimone.pdf&ei=hPH7R9GLFZbQiAG81cz3BA&usg=AFQjCNHX8iKMMoHysQjdd24Vu0klznNc6g&sig2=zcaXvJ9HrZMv_IsTAdq5Gw Agimone: Middleware Support for Seamless Integration of Sensor and IP Networks]." Proceedings of 2006 International Conference on Distributed Computing in Sensor Systems (DCOSS '06).

* Daniel Massaguer, '''Chien-Liang Fok''', Nalini Venkatasubramanian, Gruia-Catalin Roman, and Chenyang Lu. [[media:explore-wsn-aamas06.pdf|Exploring sensor networks using mobile agents]]. In Proceedings of the Fifth international Joint Conference on Autonomous Agents and Multiagent Systems (Hakodate, Japan, May 08 - 12, 2006). AAMAS '06. ACM, New York, NY, 323-325.

* Chenyang Lu, Guoliang Xing, Octav Chipara, '''Chien-Liang Fok''', and Sangeeta Bhattacharya, “[http://portal.acm.org/citation.cfm?id=1069387&jmp=cit&coll=GUIDE&dl=GUIDE&CFID=59781424&CFTOKEN=63577541# A Spatiotemporal Query Service for Mobile Users in Sensor Networks],” International Conference on Distributed Computing Systems (ICDCS'05), Columbus, OH, June 2005.

* '''Chien-Liang Fok''', Gruia-Catalin Roman, Chenyang Lu. "[[media:icdcs05-agilla.pdf|Rapid Development and Flexible Deployment of Adaptive Wireless Sensor Network Applications]]." In Proceedings of the 24th International Conference on Distributed Computing Systems (ICDCS'05), Columbus, Ohio, June 6-10, 2005, pp. 653-662.

* '''Chien-Liang Fok''', Gruia-Catalin Roman, Chenyang Lu. "[[media:spots05-agilla.pdf|Mobile Agent Middleware for Sensor Networks: An Application Case Study]]" In Proceedings of the 4th International Conference on Information Processing in Sensor Networks (IPSN'05), Los Angeles, California, April 25-27, 2005, pp. 382-387.

=== Book Chapters ===
* Fok, C.-L., Roman, G.-C., Lu, C., "Software Support for Application Development in Wireless Sensor Network," A. Corradi and P. Bellavista (editors), Handbook of Mobile Middleware, CRC Press, September 2006.

=== Workshop Papers ===
* '''Chien-Liang Fok''', Gruia-Catalin Roman, Chenyang Lu. "[http://doi.acm.org/10.1145/1317103.1317104 Towards a Flexible Global Sensing Infrastructure]." SIGBED Rev. 4, 3 (Apr. 2007), 1-6. ([[media:liang-gsi07.ppt|ppt]])

=== Demo Abstracts ===
* Fei Sun, '''Chien-Liang Fok''', Gruia-Catalin Roman. [[media:sChat-ipsn07.pdf|sChat: A Group Communication Service Over Wireless Sensor Networks]]. In Proceedings of the 6th international Conference on information Processing in Sensor Networks (Cambridge, Massachusetts, USA, April 25 - 27, 2007). IPSN '07. ACM, New York, NY, 543-544.

* Sangeeta Bhattacharya, '''Chien-Liang Fok''', Chenyang Lu, and Gruia-Catalin Roman, “[[media:mads_sensys06.pdf|Demo Abstract: A Hierarchical Location Directory Service Across Sensor and IP Networks]],” ACM Conference on Embedded Networked Sensor Systems (SenSys'06), November 2006.

* Gregory Hackmann, '''Chien-Liang Fok''', Gruia-Catalin Roman, Chenyang Lu, Christopher Zuver, Kent English and John Meier. "[[media:sensys05_cargo.pdf|Demo Abstract: Agile Cargo Tracking Using Mobile Agents]]." In Proceedings of the Third Annual Conference on Embedded Networked Sensor Systems (SenSys 2005). November 2-4, 2005. Page 303.

* Sangeeta Bhattacharya, Octav Chipara, Brandon Harris, Chenyang Lu, Guoliang Xing, '''Chien-Liang Fok''', “[[media:mq_sensys04demo.pdf|Demo Abstract: MobiQuery - A Spatiotemporal Data Service for Sensor Networks]],” ACM Conference on Embedded Networked Sensor Systems (SenSys'04), Baltimore, MD, November 2004.

=== Posters ===
* "sChat: A Group Communication Service Over Wireless Sensor Networks", Fei Sun, '''Chien-Liang Fok''', Gruia-Catalin Roman, IPSN 2007, Boston, MA. Download: [[media:sChat-poster-ipsn07.pdf|pdf]], [[media:sChat-poster-ipsn07.ppt|ppt]]
* "Efficient Network Exploration and Fire Detection using Mobile Agents in a Wireless Sensor Network" - (MURI ONR 3-Year Review, Baltimore, MD. Nov 19, 2004)
* "Fluid Software Infrastructure for Wireless Sensor Networks." (NSF NOSS PI Meeting, Harvard University, Oct 17-18, 2005)
* "AgiTrack: Agile Cargo Tracking Using Mobile Agents." (SenSys'05, San Diego, CA, Nov 2-4, 2005)

=== Presentations ===
* [[media:MURI-ONR-4Yr-Agilla.ppt|MURI ONR 4-Year Review]], University of Illinois, Urbana-Champaign. Oct 7, 2005.

=== Technical Reports ===

== Projects ==
* [http://mobilab.wustl.edu/projects/limone/ Limone] - a lightweight middleware for coordination in wireless ad hoc networks
* [http://mobilab.wustl.edu/projects/agilla/index.html Agilla] - the first mobile agent middleware for wireless sensor networks
* [http://userfs.cec.wustl.edu/%7Esn4rowing/ TinyCoxswain] - the use of wireless sensor networks for monitoring crew performance in racing shells.

== Funding ==
* [http://formal.cs.uiuc.edu/contessa/ CONTESSA MURI]
* [http://www.nsf.gov/ NSF] - [http://www.nsf.gov/dir/index.jsp?org=CISE Directorate for Computer & Information Science & Engineering (CISE)]

== Random Links ==
* [http://www.cse.wustl.edu/~liang/research/sn/equipment/index.html Lab Equipment]
* [http://www.cse.wustl.edu/~liang/tinyos-install/ TinyOS Installation Notes]
* [http://www.cse.wustl.edu/~liang/software/index.htm Software]
* [http://www.cse.wustl.edu/~liang/research/imote/index.html Imote1 Notes]
* [http://msdn06.e-academy.com/elms/Storefront/Home.aspx?campus=washu_csce MSDN E-Academy]

CSE730x Research Seminar

2009-09-04T00:30:22Z

Liangfok:

CSE730x Research Seminar

2009-09-02T06:01:17Z

Liangfok:

CSE730x Research Seminar

2009-09-01T05:01:51Z

Liangfok: /* December 11, 2009 - Abu Sayeed Saifullah */

CSE730x Research Seminar

2009-08-31T17:11:46Z

Liangfok:

CSE730x Research Seminar

2009-08-31T07:36:55Z

Liangfok: