2019
Quantifying Process Variations and Its Impacts on Smartphones
Guru Prasad Srinivasa, Scott Haseley (Google), Mark Hempstead (Tufts University), and Geoffrey Challen (University of Illinois)
Proceedings of the 2019 IEEE International Symposium on Performance Analysis of Systems and Software (ISPASS'19). CORE 2018: B. Acceptance rate: 30%.
Lessons from Four Years of PhoneLab Experimentation
Jinghao Shi (Facebook), Edwin Santos, and Geoffrey Challen (University of Illinois)
arXiv:1902.01929
2018
VeriFi: Model-Driven Runtime Verification Framework for Wireless Protocol Implementations
Jinghao Shi (Facebook), Shuvendu Lahiri (Microsoft Research), Ranveer Chandra (Microsoft Research), and Geoffrey Challen (University of Illinois)
arXiv:1808.03406
2017
Wireless Protocol Validation Under Uncertainty
Jinghao Shi (Facebook), Shuvendu Lahiri (Microsoft Research), Ranveer Chandra (Microsoft Research), and Geoffrey Challen (University of Illinois)
An International Journal Volume 51 Formal Methods in System Design (FMSD). ERA 2010: A.
Separated by Birth: Hidden Differences Between Seemingly-Identical Smartphone CPUs
Guru Prasad Srinivasa, Rizwana Begum (Drexel University), Scott Haseley (Google), Mark Hempstead (Tufts University), and Geoffrey Challen (University of Illinois)
Proceedings of the 18th Workshop on Hot Topics in Mobile Computing Systems and Applications (HotMobile'17). CORE 2014: C. Acceptance rate: 36%.
Measuring and Improving Smartphone QoE Using the Screen as a Sensor (Poster)
Scott Haseley (Google) and Geoffrey Challen (University of Illinois)
Proceedings of the 18th Workshop on Hot Topics in Mobile Computing Systems and Applications (HotMobile'17).
2016
Algorithms for CPU and DRAM DVFS Under Inefficiency Constraint
Rizwana Begum (Drexel University), Guru Prasad Srinivasa, Geoffrey Challen (University of Illinois), and Mark Hempstead (Tufts University)
Proceedings of the 34th IEEE International Conference on Computer Design (ICCD'16).
Wireless Protocol Validation Under Uncertainty
Jinghao Shi (Facebook), Shuvendu Lahiri (Microsoft Research), Ranveer Chandra (Microsoft Research), and Geoffrey Challen (University of Illinois)
Proceedings of the 16th International Conference on Runtime Verification (RV'16).
Recipient of the Best Paper Award
Qoe-Centric Mobile Operating System Design (Poster)
Scott Haseley (Google) and Geoffrey Challen (University of Illinois)
Proceedings of the 14th International Conference on Mobile Systems, Applications and Services (MobiSys'16).
A Walk on the Client Side: Monitoring Enterprise Wifi Networks Using Smartphone Channel Scans
Jinghao Shi (Facebook), Lei Meng (Notre Dame University), Aaron Striegel (Notre Dame University), Chunming Qiao, Dimitrios Koutsonikolas, and Geoffrey Challen (University of Illinois)
Proceedings of the 2016 IEEE International Conference on Computer Communications (INFOCOM'16). CORE 2014: A*. Acceptance rate: 18%.
Why and How to Use PhoneLab
Jinghao Shi (Facebook), Edwin Santos, and Geoffrey Challen (University of Illinois)
GetMobile Mobile Computing and Communications Review, Volume 19 Issue 4.
2015
Robust, Cost-Effective and Scalable Localization in Large Indoor Areas
Tong Guan, Wen Dong, Dimitrios Koutsonikolas, Geoffrey Challen (University of Illinois), and Chunming Qiao
Proceedings of the 2015 Global Communications Conference, Exhibition, and Industry Forum (GLOBECOM'15). CORE 2014: B.
Jouler: A Policy Framework Enabling Effective and Flexible Smartphone Energy Management
Anudipa Maiti, Yihong Chen, and Geoffrey Challen (University of Illinois)
Proceedings of the 7th International Conference on Mobile Computing, Applications and Services (MobiCASE'15).
Energy-Performance Trade-offs on Energy-Constrained Devices with Multi-Component DVFS
Rizwana Begum (Drexel University), Guru Prasad Srinivasa, David Werner (Drexel University), Jerry Ajay (University at Buffalo), Geoffrey Challen (University of Illinois), and Mark Hempstead (Tufts University)
Proceedings of the 2015 IEEE International Symposium on Workload Characterization (IISWC'15). Acceptance rate: 33%.
A Little Sharing Goes a Long Way: The Case for Reciprocal Wifi Sharing
Jinghao Shi (Facebook), Liwen Gui, Dimitrios Koutsonikolas, Chunming Qiao, and Geoffrey Challen (University of Illinois)
Proceedings of the 2nd Workshop on Hot Topics in Wireless (HotWireless'15). Acceptance rate: 63%.
Pocket Data: The Need for TPC-MOBILE
Oliver Kennedy, Jerry Ajay (University at Buffalo), Geoffrey Challen (University of Illinois), and Lukasz Ziarek
Proceedings of the 7th Technology Conference on Performance Evaluation and Benchmarking (TPCTC'15).
Crowdsourcing Available Parking and Available Storage Using Smartphones (Thesis)
Anandatirtha Nandugudi (University of Memphis)
Defended 6/5/2015.
maybe We Should Enable More Uncertain Mobile App Programming
Geoffrey Challen (University of Illinois), Jerry Ajay (University at Buffalo), Nick DiRienzo (Optimizely), Oliver Kennedy, Anudipa Maiti, Anandatirtha Nandugudi (University of Memphis), Sriram Shantharam, Jinghao Shi (Facebook), Guru Prasad Srinivasa, and Lukasz Ziarek
Proceedings of the 16th Workshop on Hot Topics in Mobile Computing Systems and Applications (HotMobile'15). CORE 2014: C. Acceptance rate: 28%.
The Missing Numerator: Toward a Value Measure for Smartphone Apps
Anudipa Maiti and Geoffrey Challen (University of Illinois)
Proceedings of the 16th Workshop on Hot Topics in Mobile Computing Systems and Applications (HotMobile'15). CORE 2014: C. Acceptance rate: 28%.
Crowdsourcing Access Network Spectrum Allocation Using Smartphones (Poster)
Jinghao Shi (Facebook), Zhangyu Guan, Chunming Qiao, Tommaso Melodia (Northeastern University), Dimitrios Koutsonikolas, and Geoffrey Challen (University of Illinois)
Proceedings of the 16th Workshop on Hot Topics in Mobile Computing Systems and Applications (HotMobile'15).
2014
Controlling Smartphone User Privacy via Objective-driven Context Mocking
Nick DiRienzo (Optimizely) and Geoffrey Challen (University of Illinois)
Proceedings of the 6th International Conference on Mobile Computing, Applications and Services (MobiCASE'14). Acceptance rate: 29%.
The PocketLocker Personal Cloud Storage System
Anandatirtha Nandugudi (University of Memphis), Carl Nuessle, Geoffrey Challen (University of Illinois), Emiliano Miluzzo (AT&T Labs Research), and Yih-Farn Chen (AT&T Labs Research)
Proceedings of the 6th International Conference on Mobile Computing, Applications and Services (MobiCASE'14). Acceptance rate: 29%.
Crowdsourcing Access Network Spectrum Allocation Using Smartphones
Jinghao Shi (Facebook), Zhangyu Guan, Chunming Qiao, Tommaso Melodia (Northeastern University), Dimitrios Koutsonikolas, and Geoffrey Challen (University of Illinois)
Proceedings of the 13th ACM Workshop on Hot Topics in Networks (HotNets'14). CORE 2014: A. Acceptance rate: 22%.
Should Smartphone Users Mock Apps?
Nick DiRienzo (Optimizely) and Geoffrey Challen (University of Illinois)
Proceedings of the 6th ACM HotPlanet Workshop (HotPlanet'14).
PocketParker: Pocketsourcing Parking Lot Availability
Anandatirtha Nandugudi (University of Memphis), Taeyeon Ki, Carl Nuessle, and Geoffrey Challen (University of Illinois)
Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp'14). CORE 2014: A*. Acceptance rate: 14%.
Enabling MOOC Collaborations Through Modularity
Geoffrey Challen (University of Illinois) and Margo Seltzer (Harvard University)
Proceedings of the 2014 Learning with MOOCs Practitioner’s Workshop (LWMOOCs'14).
The Mote is Dead. Long Live the Discarded Smartphone!
Geoffrey Challen (University of Illinois), Scott Haseley (Google), Anudipa Maiti, Anandatirtha Nandugudi (University of Memphis), Guru Prasad Srinivasa, Mukta Puri, and Junfei Wang
Proceedings of the 15th Workshop on Hot Topics in Mobile Computing Systems and Applications (HotMobile'14). CORE 2014: C. Acceptance rate: 31%.
New Interfaces for Achieving Power Agility on Mobile Devices (Poster)
Guru Prasad Srinivasa, Rizwana Begum (Drexel University), Scott Haseley (Google), Mark Hempstead (Tufts University), and Geoffrey Challen (University of Illinois)
Proceedings of the 15th Workshop on Hot Topics in Mobile Computing Systems and Applications (HotMobile'14).
Smartphone Users Want to be Mocked (Poster)
Nick DiRienzo (Optimizely), Gino Buzzelli (Microsoft), and Geoffrey Challen (University of Illinois)
Proceedings of the 15th Workshop on Hot Topics in Mobile Computing Systems and Applications (HotMobile'14).
Recipient of the Best Poster Award
2013
PhoneLab: A Large Programmable Smartphone Testbed (Invited)
Anandatirtha Nandugudi (University of Memphis), Anudipa Maiti, Taeyeon Ki, Fatih Bulut, Murat Demirbas, Tevfik Kosar, Chunming Qiao, Steven Y. Ko, and Geoffrey Challen (University of Illinois)
Proceedings of the 1st International Workshop on Sensing and Big Data Mining (SENSEMINE'13).
Model-Free HVAC Control Using Occupant Feedback
Sean Purdon (University of Queensland), Brano Kusy (CSIRO ICT Center), Raja Jurdak (CSIRO ICT Center), and Geoffrey Challen (University of Illinois)
Proceedings of the 2nd IEEE International Workshop on Global Trends in Smart Cities (goSmart'13). Acceptance rate: 50%.
Participant Behavior in PhoneLab (Poster)
Anandatirtha Nandugudi (University of Memphis), Anudipa Maiti, Fatih Bulut, Sonali Batra, Taeyeon Ki, Geoffrey Challen (University of Illinois), Murat Demirbas, Steven Y. Ko, Tevfik Kosar, and Chunming Qiao
Proceedings of the 3rd Conference on the Analysis of Mobile Phone Datasets (NetMob'13).
2011
The Case for Power Agile Computing
Geoffrey Challen (University of Illinois) and Mark Hempstead (Tufts University)
Proceedings of the 13th Workshop on Hot Topics in Operating Systems (HotOS-XIII). CORE 2014: A. Acceptance rate: 25%.
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