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As life expectancy in the industrialized world increases, so does the number of elders with chronic health conditions such as diabetes and congestive heart failure who require complex self-management routines. We present a motivational exercise gaming system whose goal is to increase the activity of elders with complex chronic conditions. Our gaming system, initially deployed unattended, showed discouraging...
Wireless sensor networks can play an important role in detecting disasters and navigating the personnel out of dangerous areas. In emergency navigation applications, personal safety and evacuation time of human beings are commonly considered criteria. Consequently, existing works mainly focus on finding the shortest safe path for each person. However, in practice, the number of people may be much...
Network lifetime is crucial to 3D Under Water Sensor Networks (UWSNs) because it decreases more seriously than in 2D scenarios as the radius of the monitored region grows. We utilize sink mobility to solve the problem intuitively because the sink deployed in a vehicle is controllable while sensors are hard to be retrieved and recharged. It is hard to extend the results in 2D scenarios, i.e., a circular...
Navigation with wireless sensor networks (WSNs) can help people escape safely from an emergency. Previous navigation algorithms attempt to find safe and efficient escape paths for individuals under various environmental dynamics but ignore possible congestion caused by the individuals rushing for the exits. Moreover, all the previous works have overlooked the fact that the emergency rescue force can...
Most previous localization and tracking systems in wireless sensor networks are based on RF signals, ultrasounds, and UWB. However, systems using RF signals suffer accuracy fluctuations and systems using ultrasound or UWB need extra hardware. In our paper, we propose to utilize light, an easily accessible and pervasive resource in our daily life, and off-the-shelf TelosB Motes to achieve the goal...
Consisting of sensors and vehicles, Underwater Sensor Networks (UWSNs) are deployed to perform collaborative monitoring tasks over a given region, such as water quality monitoring, mining equipment monitoring, oceanographic data collection, pollution surveillance, etc. However, comparing with terrestrial wireless sensor networks, it is more crucial to prolong network lifetime for UWSNs since the varying...
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