Yung-Chih Chen Department of Computer Science University of Massechusetts at Amherst 140 Governors Drive University of Massachusetts Amherst, MA 01003-9264 email: yungchih {AT} cs.umass.edu

• Mobility Modeling and Performance Evaluation
• Pattern Recognition and Mobility Data Mining
• Delay Tolerant Networks and Opportunistic Networks
• Network Protocols

• Ling-Jyh Chen, Yung-Chih Chen. An Analytical Study of People Mobility in Opportunistic Networks. Journal of Information Science and Engineering (JISE) Vol. 26, No.1, pp. 197-214, 2010.

• Yung-Chih Chen, Jim Kurose, and Don Towsley," A mixed queueing network model of mobility in a campus wireless network," in Infocom 2012, Orlando, FL (mini-conf). [Slides] [longer version]
• Yung-Chih Chen, Jim Kurose, and Don Towsley," A simple queueing network model of mobility in a campus wireless network," in MobiCom Student Workshop (S3'11), Las Vegas, NV, Sept 2011[longer version] (Best Theory Session Talk Awarded)
• Yung-Chih Chen, Elisha Rosensweig, Jim Kurose, and Don Towsley," Group Detection in Mobility Traces,," in Mobility Modeling and Performance Evaluation (MoMoPE), Caen, France, June 2010.
• Xiaofeng Lu, Yung-Chih Chen, Ian Leung, Zhang Xiong, and Pietro Lio, A Novel Mobility Model from a Heterogeneous Military MANET Trace", in Proceedings of the 7th international conference on Ad-hoc, Mobile and Wireless Networks (ADHOC-NOW'08), Antipolis, France, 2008.
• Ling-Jyh Chen, Yung-Chih Chen, Tony Sun, Paruveli Sreedevi, Kuan-Ta Chen, Chen-Hung Yu, and Hao-hua Chu, "Finding Self-Similarities in Opportunistic People Networks," in Infocom 2007, Anchorage, AK (mini-conf). [Slides] (Acceptance Rate: ~21%)
• Ling-Jyh Chen, Tony Sun, and Yung-Chih Chen, "Improving Bluetooth EDR Data Throughput Using FEC and Interleaving," in Proceedings of the Second International Conference on Mobile Ad Hoc and Sensor Networks (MSN'06), Springer LNCS 4325, pp. 725-736, Hong Kong, 2006. [Slides] (Acceptance Rate: 31.8%)
• Ling-Jyh Chen, Chen-Hung Yu, Tony Sun, Yung-Chih Chen, and Hao-hua Chu, "A Hybrid Routing Approach for Opportunistic Networks," in Proceedings of the 2006 ACM SIGCOMM Workshop on Challenged Networks (CHANTS'06), pp. 213-220, Pisa, Italy, 2006. [Slides]

Yung-Chih Chen, Yeon-sup Lim, Erich M. Nahum, Richard J. Gibbens, and Don Towsley. "Characterizing 4G and 3G Networks: Supporting Mobility with Multi-Path TCP," UMass Technical Report: UM-CS-2012-022 .

Research Experience

• Setp.'07 - present: Research Assistant, Computer Networks Research Group, UMass-Amherst
• Jan.'06 - July'07 : Research Assistant, Institute of Information Science, Academia Sinica, Taiwan
• Mar.'03 - June'04 : Intern of Program for Promoting Academic Excellence of Universities, National Tsing Hua University, Taiwan

Working Experience

• June'09-Aug'09; Research Intern, Bell Labs/Acatel-Lucent, Murray Hill, NJ
  • Perform traffic analysis (pattern/cluster identification) and scheduling on 3G data networks.
• June'08-Aug'08; Research Intern, Raytheon BBN Technologies, Cambridge, MA
  • Design a universal mobility model platform using AI techniques.(now in tech. transition to US Army Research Lab.)
• Aug.'04-Dec.'05; Network Information Officer, Ministry of Foreign Affaris, Taipei, Taiwan
  • Compulsory military service - in department of information and cultural affairs
  • Maintained information systems securely connected with embassies and representative offices over 190 countries.

Course Publications Since 2007, I've taken core courses from CS dept. I tried very hard to turn everything I learned from courses into something practical and relevant to my research. Here are some publications from courses I took - although none of them is considered as part of my thesis....

• Artificial Intelligence (Prof. Victor Lesser)
  [keywords: A* search, path planning, autonomous agent behavior: pursue/evade, flock, obstacle avoidance]

  • ACITA'08 demo (London, UK):Universal Mobility Modeling Framework
    • the software platform is now under technical transition to US Army Research
  • ACITA'09 poster (Maryland, US):Mobility Modeling for MANETs: Generation and Understanding of Mobility Traces
• Performance Evaluation (Prof. Don Towsley)
  [Keywords: Semi-markov model, Stochastic Process, Graph Theory]

  • AdHoc-NOW'08 full paper (Antipolis, France): A Novel Mobility Model from a Heterogeneous Military MANET Trace
  • ACITA'08 full paper (London, UK): On Secure Network Structures in the Lakehurst Trace
  • ACITA'09 poster (Maryland, US): Modeling Lakehurst Trace

• Machine Learning (Prof. Sridhar Mahadevan)
  [keywords: k-means, Spectral Clustering, PCA, Kalman Filter, Time Series Analysis]

  • ACITA'09 poster (Maryland, UK)
  • MoMoPE'10 full paper (Caen, France):Group Detection in Mobility Traces
  • Synthesis Project 2010: Trace-Driven Group Mobility Modeling

• A Mixed Queueing Network Model of Mobility in a Campus Wireless Network. Infocom, Orlando, 03/2012
• A Simple Queueing Network Model of Mobility in a Campus Wireless Network. ACITA, Maryland, 09/2011
• A Simple Queueing Network Model of Mobility in a Campus Wireless Network. MobiCom S3 workshop, Las Vegas, 09/2011
• A Simple Queueing Network Model of Mobility in a Campus Wireless Network. EITC, Harvard University, 08/2011
• Mobility Modeling and Its Challenges. Network Research Lab, Academia Sinica, Taiwan, 02/2011
• Group Mobility Modeling. INRIA, Sophia-Antibes, France, July 2010
• Group Detection in Mobility Traces. MoMoPE Workshop, Caen, France, June 2010
• Group Mobility Modeling. Technicolor, Paris, France, June 2010
• Group Detection in Mobility Traces. ACITA, Maryland, Aug. 2009
• Modeling Lakehurst Trace. ACITA, Maryland, Aug. 2009
• Universal Mobility Model Framework (UMMF). Raytheon BBN Technologies, Cambridge, MA, Aug. 2008
• Finding Self-Similarities in Opportunistic People Networks. INFOCOM, Anchorage, USA, May 2007.[PPT]
• Improving Bluetooth EDR Data Throughput Using FEC and Interleaving. MSN, Hong Kong, China, Dec. 2006. [PPT]

• Languages: C/ C++, Perl, JAVA, Assembly, HTML, Java Script
• Applications: R (S-Plus), MATLAB, LaTeX
• Operation Systems: Linux, UNIX, MS-Windows

• Madarin Chinese: native, English: fluent, German: fair, Spanish: basic