Refereed Conference/Workshop Articles

A. Helal, A. Khaled, and W. Lindquist, "The Importance of Being Thing, Or the Trivial Role of Powering Serious IoT Scenarios," In Proceedings of the 39th IEEE International Conference on Distributed Computing Systems (ICDCS), Dallas, Texas, July 7-10, 2019.

E. Wilson, A. Helal, C. Bull and M. Honary, "Persuasive Health: Back to the Future," In Proceedings of 13 EAI International Conference on Pervasive Computing Technologies for Healthcare (Pervasive Health), Trento, Italy, May 2019.

JW Lee and A. Helal, "Context Awareness Computing in Smart Spaces Using Stochastic Analysis of Sensor Data," In Proceedings of the International Conference on Intelligent Human Systems Integration, San Diego, CA, February 2019.

E. Lagerspetz, J. Leppanen, E. Peltonen, H. Flores, P. Nurmi, S. Tarkoma, N. Davies, and A. Helal, "CoCoon: Collaborative and Opportunistic cloudlets," submitted to the 4th ACM/IEEE International Conference on Internet of Things Design and Implementation (IoTDI19)

A. Khaled, W. Lindquist, and A. Helal, "Demo Abstract: DIY Health IoT Apps," In Proceedings of the 18th ACM Sensor Systems Conference (SenSys), Shenzen, China, November 4-7, 2018.

X. Liu, X. Zhang, Y. Wang, J. Zhou, A. Helal, Z. Xu, W. Zhang, and A. Cao, "PARMTRD: Parallel Association Rules Based Multiple-Topic Relationships Detection," In Proceedings of the International Conference on Web Services, Seattle, USA. June 2018.

A. Khaled and A. Helal, "A Framework for Inter-Thing Relationships for Programming the Social IoT," In Proceedings of the IEEE World Forum on IoT, Singapore, February 2018.

A. Helal, A. Khaled, and V. Gutta, "Demo: Atlas Thing Architecture Enabling Mobile Apps as Things in the IoT," Proceedings of the 23rd Annual International Conference on Mobile Computing and Networking (MobiCom), Snowbird, Utah, USA, Oct 2017.

S. Liu, A. Helal and JW Lee, "High Fidelity Simulation and Visualization of Activities of Daily Living," Proceedings of the 15th International Conference on Smart Homes and Health Telematics (ICOST), Paris, France, Aug 2017.

Xin Liu, Feng Wang, Sumi Helal, Zhongwei Li, Pingjun Zou and Yiwen Wang, "Topic detection Based on Similar Networks," Proceedings of the IEEE International Conference on Systems, Man, and Cybernetics (SMC), Banff, Canada, October 2017.

JW Lee and A. Helal, "Inferring Contexts From Human Activities in Smart Spaces," in Proceedings of the 29th International FLAIRS Conference on Artificial Intelligence, Key Largo, Florida, May 2016.

A. DAloia, M. Lelli, D. Lee, A. Helal, and P. Bellavista, "Cicero: Middleware for Developing Persuasive Mobile Applications," in Proceedings of the 11th International Conference on Persuasive Technologies, Salzburg, Austria, April 2016.

D. Kim, C. Lee, and A. Helal, "Enabling Elastic Services for OSGi-Based Cloud Platforms," Proceedings of the 7th International Conference on Ubiquitous and Future Networks (ICUFN 2015), 2015.

S. Liu, A. Helal, and J.W. Lee, "Activity Playback Modeling for Smart Home Simulation," Proceedings of the 13th International Conference on Smart Homes and Health Telematics (ICOST), 2015.

A. Helal and Y. Xu, "Scalable and Energy-Efficient Cloud-Sensor Architecture for Cyber Physical Systems," NSF Workshop on Big Data Analytics in CPS: Enabling the Move from IoT to Real-Time Control, Apr 2015.

Y. Xu and A. Helal, "An Optimization Framework for Cloud-Sensor Systems," Proceedings of the 6th IEEE International Conference on Cloud Computing, 2014.

P. Raj and A. Helal, "Palantir: Crowdsourced Newsification using Twitter," Proceedings of the 11th International Conference on Ubiquitous Intelligence and Computing (UIC), 2014.

Y. Xu and A. Helal, "Application Caching for Cloud-Sensor Systems," Proceedings of the 17th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 14), 2014.

V. Thanasias, C. Lee, and S. Helal, "Budget-Aware Workflow Scheduling in the Cloud," Proceedings of the 6th International Conference on Ubiquitous and Future Networks (ICUFN 14), 2014.

E. Cho, J. Choi, and A. Helal, "A Formal Modeling on Exceptions for Context Aware Systems," Proceedings of the 3rd IEEE International Workshop on Modeling and Verifying Distributed Applications (MVDA), in conjunction with COMPSAC 14, 2014.

JW. Lee, A. Helal, Y. Sung, and K. Cho, "Context Activity Selection and Scheduling in Context-driven Simulation," Proceedings of the Symposium on Theory of Modeling and Simulation (TMS '14), 2014.

E. Cho, J. Choi, and A. Helal, "Dynamic Parameter Filling for Semantic Exceptions in Context-Aware Systems," Proceedings of the 10th International Conference on Ubiquitous Intelligence and Computing (UIC), 2013.

JW. Lee, A. Helal, and Y. Sung, "Algorithms for Scalable Context-driven Simulation for Human Activities," Proceedings of the 10th International Conference on Ubiquitous Intelligence and Computing (UIC), 2013.

P. Savolainen, A. Helal, J. Reitmaa, K. Kuikkaniemi, G. Jacucci, M. Rinne, M. Turpeinen, and S. Tarkoma, "SpaceifyA Client-Edge-Server Ecosystem for Mobile Computing in Smart Spaces," poster in the 19th ACM International Conference on Mobile Computing and Networking (MobiCom13), 2013.

C. Lee, V. Thanasias, E. Kim, and A. Helal, "A Context-Aware Service Discovery Framework Based on UPnP and CC/PP," Proceedings of the 6th International Conference on Information, 2013.

Y. Sung, A. Helal, J.W. Lee, and K. Cho, "Bayesian-Based Scenario Generation Method for Human Activities," Proceedings of the ACM SIGSIM Conference on Principles of Advanced Discrete Simulation (PADS), 2013.

J.W. Lee, A. Helal, Y. Sung, and K. Cho, "A Context-Driven Approach to Scalable Human Activity Simulation," Proceedings of the ACM SIGSIM Conference on Principles of Advanced Discrete Simulation (PADS), 2013.

E. Kim and A. Helal, "Fuzzy Logic Based Activity Life Cycle Tracking and Recognition," Proceedings of the 11th International Conference on Smart Homes and Health Telematics (ICOST), 2013.

D. Lee, A. Helal, and Y. Sung, "Persuasion Assessment in 3G Telehealth Systems," Proceedings of the 11th International Conference on Smart Homes and Health Telematics (ICOST), 2013.

D. Lee and A. Helal, "From Activity Recognition to Situation Recognition," Proceedings of the 11th International Conference on Smart Homes and Health Telematics (ICOST), 2013.

A. Helal, K. Cho, W. Lee, Y. Sung, J.W. Lee, and E. Kim, "3D Modeling and Simulation of Human Activities in Smart Spaces," Proceedings of the 9th International Conference on Ubiquitous Intelligence and Computing (UIC), 2012.

E. Cho and A. Helal, "Toward Efficient Semantic Exceptions in Context-Aware Systems," Proceedings of the IEEE Conference on Computers, Software and Applications (COMPSAC), 2012.

E. Cho and A. Helal, "Towards Efficient Detection of Semantic Exceptions in Context Aware Systems," Proceedings of WEISS 2012: International Workshop on Embedded Intelligence and Smart Systems, in conjunction with the 9th International Conference on Ubiquitous Intelligence and Computing (UIC), 2012.

C. Chen. A. Helal, S. de Deugd, and A. Smith, "Toward a Collaboration Model for Smart Spaces," Proceedings of the Third International Workshop on Software Engineering for Sensor Network Applications (SESENA), in conjunction with ACM/IEEE International Conference on Software Engineering (ICSE), 2012.

Y. Xu, A. Helal, M. Thai, and M. Schmalz, "Optimizing Push/Pull Envelopes for Energy-Efficient Cloud-Sensor Systems," Proceedings of the 14th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM), 2011.

E. Kim, A. Helal, C. Nugent, and J.W. Lee, "Assurance-Oriented Activity Recognition," Proceedings of the International Workshop on Situation, Activity and Goal Awareness (SAGAware), in conjunction with ACM Ubicomp Conference, 2011.

C. Chen and A. Helal, "A Device-Centric Approach to a Safer Internet of Things," Proceedings of the International Workshop on Networking and Object Memories for the Internet of Things (NOMe-IoT), in conjunction with ACM Ubicomp Conference, 2011.

E. Kim and A. Helal, "Modeling Human Activity Semantics for Improved Recognition Performance," Proceedings of the 8th International Conference on Ubiquitous Intelligence and Computing (UIC), 2011.

E. Cho and A. Helal, "A Situation-Based Exception Detection Mechanism for Safety in Pervasive Systems," Proceedings of the IEEE/IPSJ 11th Annual International Symposium on Applications and the Internet (SAINT), 2011.

E. Kim and A. Helal, "Practical and Robust Activity Modeling and Recognition," Proceedings of the 8th International Conference on Wearable Micro and Nano Technologies for Personalized Health, 2011.

D. Nguyen, N. Nguyen, M. Thai, and A. Helal, "On Optimal Algorithm for Coverage Hole Healing in Hybrid Sensor Networks," Proceedings of the 7th IEEE International Conference on Wireless Communication and Mobile Computing, 2011.

A. Helal, J.W. Lee, S. Hossain, E.J. Kim, H. Hagras, and D. Cook, "Persim-Simulator for Human Activities in Pervasive Spaces," Proceedings of the 7th International Conference on Intelligent Environments, 2011.

E. Kim and A. Helal, "The Making of a Dataset for Smart Spaces," Proceedings of the 7th International Conference on Ubiquitous Intelligence and Computing, 2010.

C. Chen and A. Helal, "Toward a Programming Model for Safer Pervasive Spaces," Proceedings of the 7th International Conference on Ubiquitous Intelligence and Computing, 2010.

E. Kim and A. Helal, "Revisiting Human Activity Frameworks," Proceedings of the 2nd International ICST Conference on Sensor Systems and Software (S-Cube), 2010.

R. Tiwari, M. Thai, and A. Helal, "Localized Energy Efficient Detection and Tracking of Dynamic Phenomena," Proceedings of the IEEE Global Communications Conference (GlobComm), 2010.

A. Helal, E. Kim, and S. Hossain, "Scalable Approaches to Activity Recognition Research," Proceedings of the Workshop Titled "How to Do Good Activity Recognition Research? Experimental Methodologies, Evaluation Metrics, and Reproducibility Issues, in conjunction with Pervasive 2010, 2010.

D. Lee, A. Helal, and B. Johnson, "An Action-Based Behavior Model for Persuasive Telehealth," Proceedings of the 8th International Conference on Smart Homes and Health Telematics (ICOST), 2010.

S. Hossain, A. Helal, J.W. Lee, and H. Hagras, "PerSim: A Simulator of Human Activities in Pervasive Spaces," Pervasive 2010 Poster Program, 2010.

P. Angin, B. Bhargava, and A. Helal, "A Mobile-Cloud Collaborative Traffic Lights Detector for Blind Navigation," Proceedings of the First IEEE International Workshop on Mobile Cloud Computing (MCC) in conjunction with the 11th International Conference on Mobile Data Management (MDM), 2010.

C. Chen, Y. Xu, K. Li, and A. Helal, "Reactive Programming Optimizations in Pervasive Computing," Proceedings of the IEEE/IPSJ 10th Annual International Symposium on Applications and the Internet (SAINT), 2010. Best Paper Award.

R. Bose and A. Helal, "Sensor-Aware Adaptive Push-Pull Query Processing in Wireless Sensor Networks," Proceedings of the 6th International Conference on Intelligent Environments (IE), 2010.

A. Elfaham, H. Hagras, A. Helal, S. Hossain, J.W. Lee, and D. Cook, "A Fuzzy Based Verification Agent for the PerSim Human Activity Simulator in Ambient Intelligent Environments," Proceedings of the IEEE World Congress on Computational Intelligence, 2010.

C. Chen, R. Bose, and A. Helal, "Atlas: An Open Model for Automatic Integration and Tele-programming of Smart Objects," Proceedings of the 3rd International Workshop on Design and Integration Principles for Smart Objects (DIPSO 2009), in conjunction with Ubicomp, 2009.

H. Lee, J. Park, and A. Helal, "Estimation of Indoor Physical Activity Level Based on Footstep Vibration Signal Measured by MEMS Accelerometer for Personal Health Care Under Smart Home Environments," Proceedings of the Second International Workshop on Mobile Entity Localization and Tracking in GPS-less Environments (MELT), in conjunction with Ubicomp, 2009.

J.W. Park and A. Helal, "TouchView: Cognitive Assistance for MPS Children," poster and demonstration program, Proceedings of the 11th ACM International Conference on Ubiquitous Computing (Ubicomp 09), 2009.

R. Bose and A. Helal, "Localized In-network Detection and Tracking of Phenomena Clouds using Wireless Sensor Networks," Proceedings of the International Conference on Intelligent Environments (IE), 2009.

A. Mendez-Vazquez, A. Helal, and D. Cook, "Synthesizing Datasets for Pervasive Spaces," Proceedings of the International Conference on Intelligent Environments (IE), 2009.

M. Schmalz, A. Mendez -Vazquez, and A. Helal, "Algorithms for the Detection of Chewing Behavior in Dietary Monitoring Applications," Proceedings of SPIE Technical Symposium: Mathematics of Data/Image Coding, Compression, and Encryption with Applications XII, vol. 7444A, 2009.

M. Weitzel, A. Smith, D. Lee, S. de Deugd, and A. Helal, "Participatory Medicine: Leveraging Social Networks in Telehealth Solutions," Proceedings of the 7th International Conference on Smart Homes and Health Telematics (ICOST), 2009.

C. Chen and A. Helal, "Device Integration in SODA Using the Device Description Language," Proceedings of the IEEE/IPSJ Symposium on Applications and the Internet, 2009. Best Paper Award.

A. Helal, A. Mendez-Vazquez, and S. Hossain, "Specification and Synthesis of Sensory Datasets in Pervasive Spaces," Proceedings of the IEEE Symposium on Computers and Communications (ISCC 09), 2009.

A. Mendez-Vazquez, A. Helal, and D. Cook, "Simulating Events to Generate Synthetic Data for Pervasive Spaces," Proceedings of the Workshop on Developing Shared Home Behavior Datasets to Advance HCI and Ubiquitous Computing Research, in conjunction with the ACM HCI Conference, 2009.

A. Helal and C. Chen, "The Gator Tech Smart House: Enabling Technologies and Lessons Learned," Proceedings of the 3rd International Convention on Rehabilitation Engineering & Assistive Technology, 2009.

A. Helal, S. Lim, R. Bose, H. Yang, H. Kim, and Y. Cho, "Experience of Enhancing the Space Sensing of Networked Robots Using Atlas Service-Oriented Architecture," Proceedings of the 8th Asia-Pacific Conference on Computer Human Interaction (APCHI), 2008.

R. Bose and A. Helal, "Observing Walking Behavior of Humans Using Distributed Phenomenon Detection and Tracking Mechanisms," Proceedings of 2nd International Workshop on Practical Applications of Sensor Networks, held in conjunction with the International Symposium on Applications and the Internet (SAINT), 2008.

R. Bose and A. Helal, "Distributed Mechanisms for Enabling Virtual Sensors in Service Oriented Intelligent Environments," Proceedings of 4th IET International Conference on Intelligent Environments (IE), 2008.

A. Abukmail and A. Helal, "A Near-Zero Run-time Energy Overhead within a Computation Outsourcing Framework for Energy Management," Proceedings of the 5th International Conference on Information Technology New Generations (ITNG), 2008.

H. Yang and A. Helal, "Safety Enhancing Mechanisms for Pervasive Computing Systems in Intelligent Environment," Proceedings of the Middleware Support for Pervasive Computing Workshop, held in conjunction with IEEE PerCom, 2008.

H. Kim, H. Yang, R. Bose, and A. Helal, "Enhancing the Sentience of URC Using Atlas Service-Oriented Architecture," Proceedings of 8th International Workshop on Human-friendly Welfare Robotic Systems (HWRS), 2007.

J. Xia, C. Chang, T. Kim, H. Yang, R. Bose, and A. Helal, "Fault-Resilient Ubiquitous Service Composition," Proceedings of the 3rd IET International Conference on Intelligent Environments (IE), 2007.

H. Yang, J. King, A. Helal, and E. Jansen, "A Context-Driven Programming Model for Pervasive Spaces," Proceedings of the 5th International Conference on Smart Homes and Health Telematic (ICOST), 2007.

R. Bose, A. Helal, V. Sivakumar, and S. Lim, "Virtual Sensors for Service Oriented Intelligent Environments," Proceedings of the Third IASTED International Conference on Advances in Computer Science and Technology, 2007.

C. Lee. S. Ko, S. Lee, W. Lee, and A. Helal, "Context-Aware Service Composition for Mobile Network Environments," Proceedings of the 4th International Conference on Ubiquitous Intelligence and Computing (UIC), 2007.

H. El-Zabadani, A. Helal, and H. Yang, "A Mobile Sensor Platform Approach to Sensing and Mapping Pervasive Spaces and their Contents," Proceedings of the International Conference on New Technologies of Distributed Systems, 2007.

J. Zhang, S. Jones, J. Wang and A. Helal, "DPQ: Using a Distributed Priority Queue to Improve Ad hoc TCP Performance," Proceedings of the 4th International Conference on Information Technology: New Generations (ITNG), 2007.

J. King, R. Bose, S. Pickles, A. Helal, S. Vanderploeg, and J. Russo, "Atlas A Service-Oriented Sensor Platform," Proceedings of the 1st IEEE International Workshop on Practical Issues in Building Sensor Network Applications (SenseApp), 2006.

C. Lee, S. Yoon, E. Kim, and A. Helal, "An Efficient Service Propagation Scheme for Large-Scale MANETs," Proceedings of the 4th International Workshop on Middleware for Pervasive and Ad-Hoc Computing (MPAC), in connection with ACM/IFIP/USENIX 7th International Middleware Conference, 2006.

J. Zhang and A. Helal, "Video Diffusion: A Routing Failure Resilient, Multi-Path Mechanism to Improve Wireless Video Transport," Proceedings of the European Symposium on Mobile Media Delivery (EuMob), 2006.

J. Zhang and A. Helal, "UbiNet: A Generic and Ubiquitous Service Provider Framework," Proceedings of the International Conference on Software Engineering Advances (ICSEA), 2006.

H. Yang, S. Lim, J. King, and A. Helal, "Open Issues in Nomadic Pervasive Computing," Proceedings of UbiSys 2006the Workshop on System Support for Ubiquitous Computing, in conjunction with the 8th Annual Conference on Ubiquitous Computing (Ubicomp), 2006.

S. Lim and A. Helal, "Encapsulation and Entity-Based Approach of Interconnection between Sensor Platform and Middleware of Pervasive Computing," Proceedings of the 3rd International Symposium on Ubiquitous Computing Systems (UCS), 2006.

R. Bose, J. King, H. El-zabadani, S. Pickles, and A. Helal, "Building Plug-and-Play Smart Homes Using the Atlas Platform," Proceedings of the 4th International Conference on Smart Homes and Health Telematics (ICOST), 2006, pp. 265272.

H. El-Zabadani, A. Helal, and M. Schmaltz, "PerVision: An Integrated Pervasive Computing/Computer Vision Approach to Tracking Objects in a Self-Sensing Space," Proceedings of the 4th International Conference on Smart Homes and Health Telematics (ICOST), 2006, pp. 315318.

E. Jansen, H. Yang, and A. Helal, "Automated Verification of Proper Choreography Implementation," Proceedings of the IEEE/IPSJ International Symposium on Applications and the Internet (SAINT), 2006.

A. Abukmail and A. Helal, "A Pervasive Internet Approach to Fine-Grain Power-Aware Computing," Proceedings of the IEEE/IPSJ International Symposium on Applications and the Internet (SAINT), 2006.

S. Willis and A. Helal, "RFID Information Grid and Wearable Computing Solution to the Problem of Way-finding for the Blind User in a Campus Environment," Proceedings of the 9th Annual IEEE International Symposium on Wearable Computers, 2005.

C. Lee, A. Helal, and D. Nordstedt, "Jini Proxy Architecture for Impromptu Mobile Service Access," Proceedings of the Workshop on Next Generation Service Platforms for Future Mobile Systems (SPMS 2006), in conjunction with the IEEE/IPSJ International Symposium on Applications and the Internet (SAINT), 2006.

H. Yang, E. Jansen, and A. Helal, "A Comparison of Two Programming Models for Pervasive Computing," Proceedings of the Workshop on Ubiquitous Networking and Enablers to Context Aware Services, in conjunction with the IEEE/IPSJ International Symposium on Applications and the Internet (SAINT), 2006.

J. Tian and A. Helal, "Performance of MIP over WLAN in Rapid Moving Environments," Proceedings of the 4th ACS/IEEE International Conference on Computer Systems and Applications, 2006.

J. Tian and A. Helal, "Rapid Mobility of MIP over WLAN," Proceedings of the International Conference on Computer Networks and Mobile Computing (ICCNMC), Lecture Notes in Computer Science vol. 3619, Springer-Verlag, 2005; ISSN 0302-9743, ISBN 3-540-28102-9.

Ali, W. Aref, R. Bose, A. Elmagarmid, A. Helal, I. Kamel, and M. Mokbel, "NILE-PDT: A Phenomenon Detection and Tracking Framework for Data Stream Management Systems," Proceedings of the VLDB 2005 Conference, 2005.

Y. Kaddourah, J. King, and A. Helal, "Cost-Precision Tradeoffs in Unencumbered Floor-Based Indoor Location Tracking," Proceedings of the Third International Conference on Smart Homes and Health Telematics (ICOST), 2005, pp. 7582.

H. El-Zabadani, A. Helal, and B. Abudlrazak, "Self-Sensing Spaces: Smart Plugs for Smart Environments," Proceedings of the 3rd International Conference on Smart Homes and Health Telematics (ICOST), 2005, pp. 9198.

D. Kochhar and A. Helal, "The ProxyGatorServer-side Wireless Toolkit," Proceedings of the IEEE International Conference on Information and Computer Science (ICICS), 2004.

E. Hernandez and A. Helal, "Predictive Mobile IP for Rapid Mobility," Proceedings of the 4th IEEE Workshop on Wireless Local Networks (WLN), 2004.

T. Divekar and A. Helal, "PEMOCO: An Infrastructure for Personal Mobile Commerce on Java Enabled Smart Phones," Proceedings of the IASTED International Conference on Advances in Computer Science and Technology, 2004.

J. Russo, A. Sukojo, S. Helal, R. Davenport, and W. Mann, "SmartWave Intelligent Meal Preparation System to Help Older People Live Independently," Proceedings of the 2nd International Conference on Smart Homes and Health Telematics (ICOST), 2004.

M. Al-Turkistany and A. Helal, "Intelligent Adaptation Framework for Wireless Thin-Client Environments," Proceedings of the International Conference on Computing, Communications and Control Technologies (CCCT), 2004.

W. Gu and A. Helal, "An XML Based Solution to Delivering Adaptive Web Content for Mobile Clients," Proceedings of the International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS), 2004.

W. Gu and A. Helal, "x-ICP: A Mobile Web Caching Protocol," Proceedings of the International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS), 2004.

L. Ran, A. Helal, and S. Moore, ""Drishti: An Integrated Indoor/Outdoor Blind Navigation System and Service," Proceedings of the 2nd IEEE Pervasive Computing Conference, 2004.

C. Lee and A. Helal, "A Multi-tier Ubiquitous Service Discovery Protocol for Mobile Clients," Proceedings of the 2003 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS), 2003.

A. Helal, C. Giraldo, Y. Kaddourah, C. Lee, H. Zabadani, and W. Mann, "Smart Phone Based Cognitive Assistant," Proceedings of the 2nd International Workshop on Ubiquitous Computing for Pervasive Healthcare Applications (UbiHealth), 2003.

A. Helal and W. Mann, "Integrating Smart Phones with Smart Spaces for Elder Care," abstract in Proceedings of the ASA International Conference on Aging, Disability and Independence, High Technology Track, 2003.

A. Helal, C. Lee, C. Giraldo, Y. Kaddoura, H. Zabadani, R. Davenport, and W. Mann, "Assistive Environments for Successful Aging," Proceedings of the 1st International Conference on Smart Homes and Health Telematics (ICOST), 2003.

C. Manescu and A. Helal, "Fast 2D Wavelet Transform through a Novel Twisted-Packed Technique," Proceedings of the 9th International Conference on Distributed Multimedia Systems, 2003.

C. Lee and A. Helal, "A Multi-tier Ubiquitous Service Discovery Protocol for Mobile Clients," Proceedings of the 2003 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS), 2003.

P. Pradhan and A. Helal, "An Efficient Algorithm for Maintaining Consistent Group Membership in Ad Hoc Networks," Proceedings of the First International Workshop on Mobile Distributed Computing (MDC), in conjunction with ICDCS '03, 2003.

A. Helal, N. Desai, V. Verma, and C. Lee, "Konark A Service Discovery and Delivery Protocol for Ad-Hoc Networks," Proceedings of the IEEE Wireless Communication and Networking Conference (WCNC), 2003.

M. Chinta, A. Helal, and C. Lee, "ILC-TCP: An Interlayer Collaboration Protocol for TCP Performance Improvement in Mobile and Wireless Environments," Proceedings of the IEEE Wireless Communication and Networking Conference (WCNC 02), 2003.

W. Gu and A. Helal, "Extended Internet Caching Protocol: A Foundation for Building Ubiquitous Web Caching," Proceedings of the ACM Symposium on Applied Computing (SAC), 2003.

J. Zhang, A. Helal, and J. Hammer, "UbiData: Ubiquitous Mobile File Service," Proceedings of the ACM Symposium on Applied Computing (SAC), 2003.

A. Helal, B. Winkler, C. Lee, Y. Kaddourah, L. Ran, C. Giraldo, and W. Mann, "Enabling Location-Aware Pervasive Computing Applications for the Elderly," Proceedings of the 1st IEEE Pervasive Computing Conference, 2003, pp. 531536.

S. Shekar, P. Nair, and A. Helal, "iGrocer- A Ubiquitous and Pervasive Smart Grocery Shopping System," Proceedings of the ACM Symposium on Applied Computing (SAC), 2003.

Y. Xia and A. Helal, "A Dynamic Data/Currency Protocol for Mobile Database Design and Reconfiguration," Proceedings of the ACM Symposium on Applied Computing (SAC), 2003.

C. Lee and A. Helal, "Context Attributes: An Approach to Enable Context-awareness for Service Discovery," Proceedings of the 3rd IEEE/IPSJ Symposium on Applications and the Internet, 2003, pp. 2230.

V. Renganarayanan, A. Helal, and A. Nalla, "Internet Agents for Effective Collaboration," Proceedings of the 4th International Workshop on Mobile Agents for Telecommunication Applications (MATA), 2002.

S. Arumugam, A. Helal, and A. Nalla, "aZIMAS: Web Mobile Agent System," Proceedings of the 6th IEEE International Conference on Mobile Agents (MA), 2002.

C. Giraldo, A. Helal, and W. Mann, "mPCA A Mobile Patient Care-Giving Assistant for Alzheimer Patients," Proceedings of the 1st International Workshop on Ubiquitous Computing for Cognitive Aids (UbiCog), in conjunction with 4th International Conference on Ubiquitous Computing (UbiComp), 2002.

E. Hernandez and A. Helal, "RAMON: Rapid Mobility Network Emulator," Proceedings of the 27th Annual IEEE Conference on Local Computer Networks (LCN), 2002.

M. Lanham, A. Kang, J. Hammer, and A. Helal, "Format-Independent Change Detection and Propagation in Support of Mobile Computing," Proceedings of the XVII Brazilian Symposium on Databases (SBBD), 2002.

A. Helal and J. Lu, "E-service Based Information Fusion: A User-Level Information Integration Framework," Proceedings of the Fourth Workshop on Technologies for E-Services, in conjunction with VLDB, 2002.

J. Meng, R. Krithivasan, S. Su, and A. Helal, "Flexible Inter-enterprise Workflow Management using E-Services," Proceedings of the 4th IEEE International Workshop on Advanced Issues of E-Commerce and Web-based Information Systems (WECWIS), 2002.

A. Nalla and A. Helal, "aZiMA: Almost Zero Infrastructure Mobile Agents System," Proceedings of the IEEE Wireless Communication and Networking Conference (WCNC), 2002.

A. Khushraj and A. Helal, "inCoda: Incremental Hoarding and Reintegration in the Coda File System," Proceedings of the 2nd IEEE/IPSJ Symposium on Internet Applications (SAINT), 2002.

S. Shah, E. Hernandez, and A. Helal, "CAD-HOC: A CAD Like Tool for Generating Mobility Benchmarks in Ad-Hoc Networks," Proceedings of the 2nd IEEE/IPSJ Symposium on Applications and the Internet (SAINT), 2002.

J. Meng, S.Y.W. Su, H. Lam, and A. Helal, "Achieving Dynamic Inter-organizational Workflow Management by Integrating Business Processes, Events, and Rules," Proceedings of the 35th Hawaii International Conference on System Sciences (HICSS-35), 2002.

A. Helal, S. Su, J. Meng, R. Krithivasan, and A. Jagatheesan, "The Internet Enterprise," Proceedings of the 2nd IEEE/IPSJ Symposium on Applications and the Internet (SAINT), 2002.

C. Lee and A. Helal, "An ns-Based Bluetooth LAP Simulator," Proceedings of the 26th Annual IEEE Conference on Local Computer Networks (LCN), 2001.

E. Hernandez and A. Helal, "Examining Mobile-IP Performance in Rapidly Mobile Environments: The Case of a Commuter Train," Proceedings of the 26th Annual IEEE Conference on Local Computer Networks (LCN), 2001, pp. 365372.

A. Helal, S. Moore, and B. Ramachandran, "Drishti: An Integrated Navigation System for Visually Impaired and Disabled," Proceedings of the 5th International Symposium on Wearable Computer (ISWC), 2001.

R. Krithivasan and A. Helal, "BizBuilder - An e-Services Framework Targeted for Internet Workflow," Proceedings of the 3rd Workshop on Technologies for E-Services, in conjunction with VLDB 2001, Lecture Notes in Computer Science vol. 2193, Springer, 2001.

D. Buszko, W. Lee, and A. Helal, "Decentralized Ad-Hoc Groupware API and Framework for Mobile Collaboration," Proceedings of the ACM International Conference on Groupware (Group), 2001.

R. Loy and A. Helal, "Active Mode Power Management for Mobile Devices," Proceedings of the 5th World Multi-Conference on Systemics, Cybernetics and Informatics, 2001. Best Paper in Session Award.

A. Helal, J. Hammer, J. Zhang, and A. Abhinav, "A Three-tier Architecture for Ubiquitous Data Access," Proceedings of the ACS/IEEE International Conference on Computer Systems and Applications, 2001.

S. Ramamurthy and A. Helal, "Optimizing Thin Clients for Wireless Computing via Localization of Keyboard Activity," Proceedings of the 2001 International Performance, Computing, and Communications Conference, 2001.

A. Helal, M. Wang, A. Jagatheesan, and R. Krithivasan, "Brokering Based Self-Organizing E-Service Communities," Proceedings of the 5th International Symposium on Autonomous Decentralized Systems (ISADS), 2000.

C. Aksoy and A. Helal, "Optimizing Thin Clients for Wireless Active-Media Applications," Proceedings of the 3rd IEEE Workshop on Mobile Computing Systems and Applications (WMCSA), 2000.

L. Sampath, A. Helal, and J. Smith, "UMA-based Wireless and Mobile Video Delivery Architecture," Proceedings of the SPIE Voice, Video, and Data Communications Symposium, part of Photonics East, 2000.

A. Helal, C. Lee, Y. Zhang, and G. Richard, "Towards Integrating Wireless LANs with Wireless WANs Using Mobile IP," Proceedings of the IEEE Wireless Communications and Networking Conference (WCNC), 2000.

A. Helal and H. Li, "Rainbow: A Java and Web-based Distributed Database System for Classroom Education and Scientific Research," demo paper, Proceedings of the 26th Very Large Data Bases Conference (VLDB), 2000.

J. Meng, A. Helal, and Stanley Su, "An Ad-Hoc Workflow Architecture Based on Mobile Agent and Rule-Based Processing," special session on Software Agent-Oriented Workflows, Proceedings of the International Conference on Parallel and Distributed Computing Techniques and Applications, 2000.

H. El-Rewini, P. Kannadath, A. Helal, and H. Ali, "The Effect of Mobility Behavior on the Performance of Mobile IP," Proceedings of the 12th IEEE International Conference on Parallel and Distributed Computing Systems, 1999.

A. Helal, "Efficient Quorum Selection Heuristics in Replicated Databases," Proceedings of the IEEE International Performance, Computing, and Communications Conference (IPCCC), 1998.

A. Helal, Y. Taha, and K. Ahmed, "Modeling Data Dependency and Consistency in Data Warehousing," Proceedings of the 7th IEEE International Conference On Computer Theory and Applications, 1997.

Y. Taha, A. Helal, and K. Ahmed, "A Stochastic Consistency Model for Data Warehousing," Proceedings of the Third Americas Conference on Information Systems, The Heterogeneous Database Interoperability and Data Warehousing Mini-Track, Indianapolis, Indiana, Aug 1997.

R. Bayardo, B. Bohrer, R. Brice, A. Cichocki, J.Fowler, A. Helal, V. Kashyap, T. Ksiezyk, G. Martin, M. Nodine, M. Rashid, Rusinkiewicz, R. Shea, C. Unnikrishnan, A. Unruh, and D. Woelk, "InfoSleuth: Semantic Integration of Information in Open and Dynamic Environments," Proceedings of the 1997 ACM International Conference on the Management of Data (SIGMOD), 1997. Also appeared as a book chapter in "Readings in Agents," Michael Huhns and Munindar Singh, Editors, Foreword by Les Gasser, Morgan Kaufman Publishing Inc., ISBN 1-55860-495-2, Published Oct 1997.

M. Ahmed, A. Helal, A. Belal, and K. Ahmed, "Optimized Tree Structure for Associative Queries," Proceedings of the Third ACM Joint International Conference on Computer Science and Informatics, Research Triangle Park, North Carolina, Mar 1997.

J. Meyer, H. El-Rewini, and A. Helal, "WinMPI: An MPI Port for Windows," Proceedings of the IASTED International Conference on Parallel and Distributed Computing and Systems, Chicago, Illinois, Oct 1996.

A. Helal, Y. Kim, A. Elmagarmid, and A. Heddaya, "Transaction Optimization," Proceedings of the ATMA Workshop on Advanced Transaction Models and Architectures, In conjunction with VLDB'96, Goa, India, Sept 1996. A more elaborate and expanded version of this paper appeared as a book chapter.

A. Helal and J. Fortner, "ScaleTool: A GUI-Based Database Scalability Evaluation Tool," Proceedings of the IASTED International Conference on Modeling and Simulation, Pittsburgh, Pennsylvania, Apr 1996.

A. Helal, D. Yuan, F. Gherfal, and A. Elmagarmid, "Evaluating Data Allocation Schemes in Shared-Nothing Parallel Databases," Proceedings of the IEEE International Conference on Electronics, Circuits and Systems, Amman, Jordan, Dec 1995.

A. Helal, S. Balakrishnan, S. Ramachandra, and M. Dunham, "A Generic Architecture for Data Access in Mobile Environments," Proceedings of the Second Annual ACM Joint Conference on Information Sciences (JCIS 95), Wrightsville Beach, North Carolina, Sept 1995.

A. Helal and K. Khalil, "Traffic Analysis and Characterization of A Local Area Network with Different Classes of Users," Proceedings of the 8th International Conference on Parallel and Distributed Computing Systems, Orlando, Florida, Sept 1995.

A. Helal, B. Welch, and R. Elmasri, "A Resilient Application-Level Failure Detection System for Distributed Computing Environments," Proceedings of the IEEE Symposium on Advances in Computers and Communications, Alexandria, Egypt, June 1995.

A. Helal and B. Bhargava, "Performance Evaluation of The Quorum Consensus Replication Method," Proceedings of the IEEE International Computer Performance and Dependability Symposium (IPDS'95), Erlangen, Germany, Apr 1995.

A. Helal, T. Ku, and J. Fortner, "Quasi-Dynamic Two-Phase Locking," Proceedings of the Third International Conference on Information and Knowledge Management (CIKM'94), Washington D.C., Nov 1994.

A. Helal, "Large-Scale Global Naming Services," Proceedings of the ISMM International Conference on Intelligent Information Management Systems, Washington D.C., June 1994.

A. Helal, T. Ku, and R. Elmasri, "Comparative Performance Analysis of Exclusive and Balanced Concurrency Control Algorithms," Proceedings of the International Conference on Parallel and Distributed Systems, Taipei, Taiwan, Dec 1993.

A. Helal, T. Ku, R. Elmasri, and S. Mukherjee, "Adaptive Transaction Scheduling," Proceedings of the International Conference on Information and Knowledge Management (CIKM'93), Washington D.C., Nov 1993.

B. Bhargava and A. Helal, "Efficient Availability Mechanisms in Distributed Database Systems," Proceedings of the International Conference on Information and Knowledge Management (CIKM'93), Washington D.C., Nov 1993.

A. Helal, Y. Zhang, and B. Bhargava, "Surveillance for Controlled Performance Degradation During Failures," Proceedings of the 25th Hawaii International Conference on System Sciences, Jan 1992.

B. Bhargava and A. Helal, "Replication Experiments in the RAID Distributed Database System," Proceedings of the Indian Computing Conference, Hyderabad, India, Nov 1990.

B. Bhargava, K. Friesen, A. Helal, and J. Riedl, "Adaptability Experiments in the RAID Distributed Database System," Proceedings of the 9th IEEE Symposium on Reliable Distributed Systems, Huntsville, Alabama, Oct 1990.

A. Helal, J. Srinivasan, and B. Bhargava, "SETH: A Quorum-Based Replicated Database System for Experimentation with Failures," Proceedings of the 5th IEEE International Conference on Data Engineering, Los Angeles, Feb 1989.

A. Elmagarmid and A. Helal, "Supporting Updates in Heterogeneous Distributed Database Systems," Proceedings of the 4th IEEE International Conference on Data Engineering, Los Angeles, Feb 1988.

M. Nagi, A. Helal, and A. Elmagarmid, "Optimistic vs. Pessimistic Concurrency Control: A Comparative Study," Proceedings of the 15th International Conference on Parallel Processing, St. Charles, Illinois, Aug 1986.

A. Helal, A. Elmagarmid, and A. Hurson, "A Paradigm for Concurrency Control Performance Evaluation," Workshop of Future Directions on Computer Architecture and Software, Charleston, South Carolina, May 1986, pp. 228235.