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The potential of crowdsourcing for complex problem solving has been revealed by smartphones. Nowadays, vehicles have also been increasingly adopted as participants in crowd-sourcing applications. Different from smartphones, vehicles have the distinct advantage of predictable mobility, which brings new insight into improving the crowdsourcing quality.(More)
Due to the low cost and ease of deployment, wireless sensor networks (WSNs) are emerging as sensing paradigms that the structural engineering field has begun to consider as substitutes for traditional tethered structural health monitoring (SHM) systems. Different from other applications of WSNs such as environmental monitoring, SHM applications are much(More)
Running regularly is a good way to keep fit. However, people's laziness usually stop them from keep up. Motivated by the competition and achievement system in many video games, we propose Runking, a mobile social network based persuasion system for running exercise. Runking can rank users' exercise records among friends and push those who are lazier than(More)
  • Zongjian He
  • 2012
Vehicular networks have brought the opportunity for new applications to improve the safety and driving experiences. With the help of VANETs, data can be disseminated among vehicles to transfer important data, such as collision warnings. Conventionally, structure based topology like R-Tree is used for stationary networks like wireless sensor networks.(More)
Wireless Sensor Networks (WSNs) are often deployed in hostile environments and an adversary can potentially capture sensor nodes. This is a typical white-box attack context, i.e., the adversary may have total visibility of the implementation of the build-in cryptosystem and full control over its execution platform - the sensor nodes. Existing encryption(More)
With the advances in telecommunications, more and more devices are connected to the Internet and getting smart. As a promising application scenario for carrier networks, vehicular communication has enabled many traffic-related applications. However, the heterogeneity of wireless infrastructures and the inflexibility in protocol deployment hinder the real(More)
Seat-level positioning of a smartphone in a vehicle can provide a fine-grained context for many interesting in-vehicle applications, including driver distraction prevention, driving behavior estimation, in-vehicle services customization, etc. However, most of the existing work on in-vehicle positioning relies on special infrastructures, such as the stereo,(More)
Network virtualization in cloud computing environment has attracted many attentions recently. With the help of network virtualization, VMM is able to provide fine-grained isolation among different VMs. However, the performance and overhead introduced by network virtualization is also important concerns when applying network virtualization to the cloud(More)
This paper presents an accelerometer-based human activity recognition system using wearable wireless body area network using ZigBee. Android mobile phone is made a part of wireless sensor network to act as a base station, which displays live information to the user. The lightweight sensor devices running Contiki and the feature of wireless design enable the(More)