50 citations · 207 across the 37 of their papers we have counts for
8 papers · 1 filter
Mobile Testbeds with an Attitude
Sungwook Moon, Ahmed Helmy
There have been significant recent advances in mobile networks, specifically in multi-hop wireless networks including DTNs and sensor networks. It is critical to have a testing env…
Spatio-Temporal Modeling of Wireless Users Internet Access Patterns Using Self-Organizing Maps
Saeed Moghaddam, Ahmed Helmy
User online behavior and interests will play a central role in future mobile networks. We introduce a systematic method for large-scale multi-dimensional analysis of online activit…
Analysis of Spatio-Temporal Preferences and Encounter Statistics for DTN Performance
Gautam S. Thakur, Udayan Kumar, Ahmed Helmy +1
Spatio-temporal preferences and encounter statistics provide realistic measures to understand mobile user's behavioral preferences and transfer opportunities in Delay Tolerant Netw…
Similarity Analysis and Modeling in Mobile Societies: The Missing Link
Gautam Thakur, Ahmed Helmy, Wei-Jen Hsu
A new generation of "behavior-aware" delay tolerant networks is emerging in what may define future mobile social networks. With the introduction of novel behavior-aware protocols,…
Data-driven Co-clustering Model of Internet Usage in Large Mobile Societies
Saeed Moghaddam, Ahmed Helmy, Sanjay Ranka +1
Design and simulation of future mobile networks will center around human interests and behavior. We propose a design paradigm for mobile networks driven by realistic models of user…
SHIELD: Social sensing and Help In Emergency using mobiLe Devices
Gautam S. Thakur, Mukul Sharma, Ahmed Helmy
School and College campuses face a perceived threat of violent crimes and require a realistic plan against unpredictable emergencies and disasters. Existing emergency systems (e.g.…
PROTECT: Proximity-based Trust-advisor using Encounters for Mobile Societies
Udayan Kumar, Gautam Thakur, Ahmed Helmy
Many interactions between network users rely on trust, which is becoming particularly important given the security breaches in the Internet today. These problems are further exacer…
Understanding periodicity and regularity of nodal encounters in mobile networks: A spectral analysis
Sungwook Moon, Ahmed Helmy
Study on human mobility is gaining increasing attention from the research community with its multiple applications to use in mobile networks, particularly for the purpose of messag…